JP2023030690A - Exhaust system for pipe lining - Google Patents

Abstract

To provide an exhaust system for pipe lining that suppresses an effect of steam being exhausted.SOLUTION: An exhaust system 38 for pipe lining of the present invention includes: an exhaust duct 382 having an exhaust port 382b for exhausting steam to an outside at a downstream end of a steam exhaust channel 382a through which steam heating a thermosetting resin impregnated in a lining material 10 lining a rainwater drainage pipe D flows is formed inside; and a second compressor 383 that feeds outside air into the steam exhaust channel 382a.SELECTED DRAWING: Figure 2

Description

The present invention relates to a pipeline lining exhaust device for exhausting steam that has heated a lining material.

Some of the underground pipelines, such as rainwater drainage pipelines and sewer pipelines, are damaged due to aging, ground subsidence, fluctuations in ground pressure, and the like. When repairing a damaged pipeline, it is preferable to carry out without excavation from the viewpoint of reducing repair costs and minimizing traffic disturbances.

Therefore, as a non-cutting repair method for pipelines, various techniques have been proposed in which a tubular lining material impregnated with a thermosetting resin is pressed against the inner peripheral wall of the pipeline, and the inner peripheral wall is lined with the lining material ( For example, see Patent Document 1, etc.). Moreover, even when a pipeline is newly buried, the inner peripheral wall of the newly buried pipeline may be lined with a lining material.

In the pipeline lining technique proposed in Patent Document 1, high-temperature air heated by a heating means is sent into the lining material. The high-temperature air presses and heats the lining material against the inner surface of the pipeline, and the curing of the thermosetting resin of the lining material progresses. By continuing the supply of high-temperature air for a predetermined period of time, the strength of the cured thermosetting resin can be improved after the curing of the thermosetting resin of the lining material is completed. After the hot air is supplied, the lining material is cut and the cut pipe mouth is finished, if necessary.

By the way, in order to efficiently supply heat to the lining material, high-temperature steam is also sent into the lining material. Even when high-temperature steam is used, the steam is sequentially fed into the lining material until the thermosetting resin impregnated in the lining material is cured and strengthened. By passing through the inside of the lining material, the steam whose heat has been taken away by the lining material is exhausted from an exhaust duct provided on the ground. When the steam is exhausted near the road, the exhausted steam is cloudy and may obstruct the visibility of drivers of vehicles passing around. As a countermeasure against this, it has been proposed to extend the exhaust duct as high as possible (see, for example, Patent Document 2, etc.).

JP 2017-52228 A JP 2018-89877 A

However, simply raising the height of the exhaust duct may cause the exhausted steam floating around to come down to the vicinity of the ground due to its own weight or wind. is likely to interfere with

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide an exhaust system for lining pipelines, which suppresses the influence of steam to be exhausted.

The pipe lining exhaust device of the present invention for solving the above problems is
A steam discharge channel through which steam generated by heating the thermosetting resin impregnated in the lining material lining the pipe flows is formed inside, and an exhaust port for discharging the steam to the outside is provided at the downstream end of the steam discharge channel. an exhaust duct;
and an outside air supply device for sending outside air into the steam discharge channel.

According to the pipe lining exhaust system of the present invention, outside air is added to the steam flowing through the steam discharge channel, so the concentration of the steam exhausted from the exhaust port is reduced. As a result, it is possible to prevent the exhausted steam from obstructing the field of view.

Further, in the exhaust system for pipe line lining of the present invention,
The exhaust duct has a duct body that defines the steam discharge channel, and a branch pipe that allows external air supplied from the external air supply device to flow into the steam discharge channel,
The branch pipe may be installed at an angle with respect to the steam discharge channel so as to approach the steam discharge channel toward the downstream side of the steam discharge channel.

According to this exhaust system for lining pipes, the outside air supplied from the outside air supply device flows into the steam discharge passage in the direction toward the exhaust port. Together with the gas, it flows to the downstream side to promote exhaustion. As a result, it becomes easier to send new high-temperature steam to the inside of the lining material.

Here, the branch pipe may be connected to the duct main body. Further, the branch pipe may send outside air toward the downstream side of the steam discharge passage. Furthermore, the branch pipe may be inclined at an angle of 15 degrees or more and 75 degrees or less with respect to the duct body. Additionally, the duct body may extend upward.

Furthermore, in the pipeline lining exhaust device of the present invention,
The branch pipe may be connected to the duct main body at a downstream portion of the steam discharge passage.

According to this pipeline lining exhaust system, the external air sent from the external air supply system tends to flow toward the relatively nearby exhaust port and is unlikely to flow back upstream. It is suppressed that it becomes a resistance to the flow of steam to the downstream side. This also makes it easier to send fresh high-temperature steam to the inside of the lining material.

Furthermore, in the exhaust system for pipeline lining of the present invention,
The duct body has a cylindrical inner peripheral surface,
The branch pipe may cause the outside air supplied by the outside air supply device to flow into the steam discharge channel so as to swirl along the inner peripheral surface.

According to this pipe lining exhaust system, the outside air supplied from the outside air supply device creates a swirling flow in the steam discharge passage, and the steam flowing through the steam discharge passage swirls while being mixed with the outside air. to the exhaust port. Since the steam is exhausted from the exhaust port while swirling, the exhausted steam easily diffuses. As a result, the concentration of the exhausted vapor becomes thinner, so that obstruction of the view can be further suppressed.

Here, the branch pipe may feed the outside air supplied by the outside air supply device into the steam discharge channel from a tangential direction to the inner peripheral surface when viewed from the longitudinal direction of the exhaust duct.

Further, in the exhaust system for pipe line lining of the present invention,
A silencer is provided to suppress noise of the steam discharged from the exhaust port,
The exhaust duct may be connected to the silencer.

The silencer can suppress the noise of the exhausted steam. Here, the exhaust duct may be detachably connected to the silencer.

ADVANTAGE OF THE INVENTION According to this invention, the exhaust apparatus for lining of pipelines which suppressed the influence of the steam exhausted can be provided.

1 is a perspective view showing an embodiment of a lining material used for lining a pipeline; FIG. FIG. 2 is a cross-sectional view schematically showing how the pipeline lining system is used and lined with the lining material shown in FIG. 1; (a) is a front view showing the exhaust duct shown in FIG. 2, and (b) is a cross-sectional view of the exhaust duct shown in FIG. 3 is a flow chart showing the process of lining a storm drain pipe at a construction site with the pipe lining system shown in FIG. 2; 4 is a graph roughly showing an example of changes in the temperature of heating steam supplied to the internal space of the lining material, etc. FIG. (a) is a side view showing a modification of the exhaust duct shown in FIG. 3, and (b) is a plan view of the exhaust duct shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the pipe lining system of the present invention is used in a pipe lining system for lining rainwater drainage pipes that are buried under the road surface of an expressway and drain rainwater on the expressway between the road shoulder side and the median strip side. A description will be given using an example in which an exhaust device is applied.

FIG. 1 is a perspective view showing one embodiment of a lining material used for lining a pipeline.

A lining material 10 shown in FIG. 1 is a sleeve-like material used when lining the inner peripheral wall of a rainwater drainage pipe D (see FIG. 2) buried in the ground. FIG. 1 shows a state in which a sleeve-shaped lining material 10 is flattened. The lining material 10 is formed by integrating two sleeve-like lining materials, a base hose 100 and a calibration hose 110 . Hereinafter, the radially outer side of the lining material 10 will simply be referred to as the outer side, and the radially inner side will simply be referred to as the inner side. The base hose 100 is positioned outside the calibration hose 110 . The calibration hose 110 is thinner than the base hose 100 .

The base hose 100 has a substrate layer 101 and an outer film layer 102 . The base material layer 101 shown in FIG. 1 is a polyester nonwoven fabric. The base material layer 101 is not limited to polyester, and may be a nonwoven fabric made of an organic fibrous material such as nylon, acrylic, vinylon, or a woven fabric made of the organic fibrous material. It may be a non-woven or woven fabric made of inorganic fibrous material such as carbon fiber or glass fiber, or a combination of organic fibrous material and inorganic fibrous material.

The base material layer 101 shown in FIG. 1 is impregnated with a compound. The compound with which the base material layer 101 is impregnated is mainly composed of vinyl ester (epoxy acrylate) resin. Incidentally, unsaturated polyester resin, urethane acrylate resin, or the like may be used instead of vinyl ester resin. A vinyl ester resin is a type of thermosetting resin that is crosslinked by a radically polymerizable monomer. The compound contains a cross-linking agent, a viscosity modifier, a filler, a curing agent (peroxide, etc.), various additives, and the like.

The outer film layer 102 covers the base layer 101 from the outside, and has a function of suppressing exudation of the compound impregnated in the base layer 101 to the outside. That is, the outer film layer 102 is impermeable to water. The outer film layer 102 shown in FIG. 1 has a laminated structure (PE/NY/PE) in which nylon (NY) is sandwiched between polyethylene (PE). Instead of polyethylene, another polyolefin such as polypropylene may be used, and a single-layer structure instead of a laminated structure may be used.

Calibration hose 110 has a base layer 111 and a stretch layer 112 . Like the base layer 101 of the base hose 100, the base layer 111 of the calibration hose 110 shown in FIG. 1 is also a polyester non-woven fabric. The base material layer 111 is not limited to polyester, and may be a nonwoven fabric made of an organic fibrous material such as nylon, acryl, vinylon, or a woven fabric made of the organic fibrous material. It may be a non-woven or woven fabric made of inorganic fibrous material such as carbon fiber or glass fiber, or a combination of organic fibrous material and inorganic fibrous material.

The base material layer 111 of the calibration hose 110 shown in FIG. 1 is also impregnated with the compound. The compound used for the calibration hose 110 also has a thermosetting resin as its main component. Thermosetting resins selected from saturated polyester acrylates can be used. This compound also contains a cross-linking agent, a viscosity modifier, a filler, a curing agent (peroxide, etc.), various additives, and the like.

The stretchable layer 112 is made of polyurethane forming the innermost peripheral surface of the lining material 10 and has excellent stretchability. That is, it is superior in extensibility to the outer film layer 102 of the base hose 100 .

Next, a method for manufacturing the lining material shown in FIG. 1 will be described. The method described here is performed in the factory.

First, an appropriate material suitable for the pipeline to be lined is prepared. Materials prepared here include a base hose 100 not impregnated with a compound and a calibration hose 110 similarly not impregnated with a compound. These hoses (100, 110) are sleeve-like ones cut to a length corresponding to the length of the pipeline to be lined, and are prepared separately. In the base hose 100 prepared here, the outer film layer 102 is positioned on the outside, and the substrate layer 101 is positioned on the inner side of the outer film layer 102 . On the other hand, the calibration hose 110 has the extension layer 112 positioned outside and the base layer 111 positioned inside the extension layer 112 . That is, the state of the calibration hose 110 shown in FIG. 1 is reversed.

In addition, base hose main agent, filler (filler), curing agent (peroxide, etc.), and various additives, which are the basis of the compound impregnated in the base hose 100, are also prepared. The main agent for the base hose prepared here contains vinyl ester, which is a thermosetting resin, as a main component (50% by weight or more). Cross-linking agents and viscosity modifiers are also used in the compound. Furthermore, silica as a thixotropic agent, cobalt naphthenate as a hardening accelerator, and a polymerization inhibitor are also used in the base hose main agent.

In addition, a calibration hose main compound, a filler (filler), a curing agent, and various additives, which are the basis of the compound impregnated in the calibration hose 110, are also prepared. The main agent for the calibration hose also contains a thermosetting resin as a main component. Compounds for calibration hoses also use methacrylates as crosslinkers and viscosity modifiers.

Resin mixing is then performed. Here, the base hose main agent, filler, curing agent, and various additives are mixed to prepare a base hose compound. A calibration hose main compound, filler, curing agent, and various additives are also mixed to prepare a calibration hose compound.

Subsequently, the base material layer 101 of the base hose 100 is impregnated with the prepared base hose compound. Further, the base material layer 111 of the calibration hose 110 is impregnated with the prepared compound for calibration hose. The base layer 101 of the base hose 100 is saturated with a compound, and the base layer 111 of the calibration hose 110 is supersaturated with a compound. That is, the impregnation ratio of the compound is set higher for the base material layer 111 of the calibration hose 110 than for the base material layer 101 of the base hose 100 . Thus, the base hose 100 impregnated with the compound and the calibration hose 110 inside which the base material layer 111 impregnated with the compound are positioned are separately prepared. The base material layer 101 of the base hose 100 may be supersaturated with a compound, and the base material layer 111 of the calibration hose 110 may be saturated with a compound.

Next, the calibration hose 110 is reversely inserted inside the base hose 100 impregnated with the compound. In the inverted insertion, the calibration hose 110 with the base material layer 111 positioned inside is turned over so that the base material layer 111 faces outside, and the calibration hose 110 is inserted inside the base hose 100 . The calibration hose 110 is inserted into the inside of the base hose 100 from one end side of the base hose 100 and reversely inserted by the force of air or water. Since the calibration hose 110 is thinner than the base hose 100, it can be easily reversed. By reversing and inserting the calibration hose 110, the base material layer 101 of the base hose 100 and the base material layer 111 of the calibration hose 110 come into contact with each other, and the two sleeves of the base hose 100 and the calibration hose 110 shown in FIG. The lining material 10 in which the shaped members are integrated is completed. As shown in FIG. 1, the outermost surface of the lining material 10 is constituted by the outer film layer 102 and its innermost surface is constituted by the stretch layer 112. Between the outer film layer 102 and the stretch layer 112, a thermoset Base material layers 101 and 111 impregnated with a flexible resin are arranged. After that, a steam supply tube 36 (see FIG. 2) for supplying steam for heating the lining material 10 is inserted inside the stretch layer 112 .

The completed lining material 10 is flattened, zigzag-folded, and stored at a low temperature. The completed lining material 10 may be stored at a low temperature in a wound state. The lining material 10 stored at a low temperature is transported to the construction site in a folded or wound state by a refrigerator car.

Next, each device of the pipeline lining system 3 will be described.

FIG. 2 is a cross-sectional view schematically showing the use of the pipeline lining system and lining with the lining material shown in FIG. FIG. 2 shows how the pipeline lining system 3 is installed on the shoulder side of a two-lane expressway HW. FIG. 2 also shows a vehicle V traveling in the lane on the side of the median strip and a triangular cone TC for preventing the vehicle V from entering the lane on the shoulder side. Although FIG. 2 shows the rainwater drainage pipe D extending horizontally, the rainwater drainage pipe D is actually installed at the shoulder of the road in order to flow down the rainwater to the median strip side. It is slightly slanted so that the median strip side is positioned lower than the side. Conversely, rainwater may flow down to the road shoulder side. In that case, the rainwater drainage pipe D is slightly inclined so that the road shoulder side is positioned lower than the median strip side.

As shown in FIG. 2, the expressway HW is provided with a gutter G, a shoulder-side catch basin B1, a center-side catch basin B2, a rainwater drainage pipe D, and a drainage pipe P. The gutter G extends along the shoulder of the highway HW. Rainwater falling on the highway HW flows into the gutter G. The shoulder-side water collection basins B1 are scattered at predetermined intervals in the extension direction of the expressway HW. This shoulder-side catch basin B1 is a catch catch basin for collecting rainwater that has flowed into the gutter G. The center-side catch basins B2 are also scattered at predetermined intervals in the extension direction of the expressway HW. The rainwater drainage pipe D is made of concrete and is buried under the road surface of the expressway HW. This rainwater drainage pipeline D corresponds to an example of a pipeline. Rainwater collected in the shoulder-side catch basin B1 by the rainwater drainage pipe D flows down to the center-side catch basin B2. The drain pipe P is a pipe for draining rainwater that has flowed down to the central catch basin B2 to the outside of the expressway HW. FIG. 2 shows a state in which a plurality of cracks C1 to C4 have occurred in the rainwater drainage pipe D. As shown in FIG. FIG. 2 also shows how the rainwater drainage pipe D is lined with a lining material 10 over its entire length. In addition, in FIG. 2, the sizes of the shoulder-side catch basin B1, the center-side catch basin B2, and the rainwater drainage pipe line D are exaggerated.

The pipeline lining system 3 includes a boiler 31, a first compressor 32, a mixing device 33, a shoulder-side jig 34, a supply hose SH, an exhaust hose CH, a center-side jig 35, and a steam supply. A tube 36 , a drain discharge pipe 37 and an exhaust device 38 are provided. This pipeline lining system 3 is installed at the construction site to line the rainwater drainage pipeline D.

The boiler 31, the first compressor 32 and the mixing device 33 are mounted on a boiler vehicle (not shown) parked on the ground. From the boiler 31, superheated steam heated to over 100° C., for example, is sent out. The steam sent out from the boiler 31 may be saturated steam. The first compressor 32 and the mixing device 33 are also installed on the ground near the boiler 31 . The first compressor 32 compresses outside air (air) and sends it out. The superheated steam sent out from the boiler 31 and the outside air sent out from the first compressor 32 are both supplied to the mixing device 33 and mixed. Hereinafter, the gas in which the superheated steam and the outside air mixed and sent out by the mixing device 33 will be referred to as heating steam. A pipe connecting the boiler 31 and the mixing device 33 is provided with a steam valve 311 , and a pipe connecting the first compressor 32 and the mixing device 33 is provided with a first air valve 321 . By operating the steam valve 311 and the first air valve 321 to adjust the throttle amount, the temperature of the heating steam sent out from the mixing device 33 can be adjusted, and the flow rate of the heating steam can be adjusted.

The road-shoulder jig 34 is arranged near the lower end of the road-shoulder catch basin B1. The shoulder-side jig 34 includes a shoulder-side plug member 341 , a shoulder-side tightening member 342 and a tube tightening member 343 . The road-shoulder plug member 341 has a steam supply pipe 3411 and a steam discharge pipe 3412, and has a cylindrical shape with the shoulder side end face closed except for the inside of the steam supply pipe 3411 and the steam discharge pipe 3412. A steam supply pipe 3411 and a steam discharge pipe 3412 pass through the end face on the side of the closed shoulder and are fixed to the end face. 2, the shoulder-side end of the lining material 10 is tightened by the road-shoulder-side tightening member 342 against the outer peripheral surface of the cylindrical portion of the road-shoulder-side plug member 341, thereby tightening the shoulder-side plug member 341. fixed to the cylinder. In addition, when the heating steam is supplied, the shoulder-side end of the steam supply tube 36 is fixed to the steam supply pipe 3411 by tightening the tube tightening member 343 against the outer peripheral surface of the steam supply pipe 3411 .

The supply hose SH is a hose having one end connected to the mixing device 33 and the other end connected to the steam supply pipe 3411 of the shoulder plug member 341 . The exhaust hose CH is a hose having one end connected to the steam discharge pipe 3412 of the shoulder-side plug member 341 and the other end connected to the later-described silencer 381 of the exhaust device 38 . An exhaust valve CH1 for adjusting the flow rate of the fluid flowing through the exhaust hose CH is provided in the exhaust hose CH. The heating steam whose temperature has been lowered to some extent by heating the lining material 10 is discharged from the steam discharge pipe 3412 and flows into the exhaust hose CH. Hereinafter, the heating steam discharged from the steam discharge pipe 3412 after completing the heating function is simply referred to as steam.

The central jig 35 is arranged near the lower end of the central catch basin B2. The central jig 35 includes a central fastening drum 351 and a central fastening member 352 . The central fastening drum 351 is a cylindrical drum with both ends open. 2, both the central end of the lining material 10 and the central end of the steam supply tube 36 are fastened to the outer peripheral surface of the central fastening drum 351 by the central fastening member 352. It is Instead of using the center fastening drum 351, the center end of the lining material 10 and the road shoulder end of the steam supply tube 36 may be tied together. However, by using the central fastening drum 351, the central end of the lining material 10 and the central end of the steam supply tube 36 can be tightly fastened. As will be described later, heating steam is supplied to the inside of the lining material 10 and the inside of the steam supply tube 36 . By firmly tightening the central end of the lining material 10 and the central end of the steam supply tube 36, the heating steam can be prevented from leaking out from the central end. As the lining material 10, a material whose center side end is closed in advance may be used. Similarly, the steam supply tube 36 may be pre-closed at the central end.

As described above, the steam supply tube 36 is fixed to the steam supply pipe 3411 at the shoulder side end and fixed to the center fastening drum 351 at the center side end when the heating steam is supplied as shown in FIG. there is Thus, the steam supply tube 36 extends inside the lining material 10 from the shoulder-side water collection pit B1 to the center-side water collection pit B2. In other words, the steam supply tube 36 extends over the entire length of the storm drain line D. As shown in FIG. Hereinafter, the space inside the lining material 10 and outside the steam supply tube 36 will be referred to as an internal space IS. The steam supply tube 36 is provided with round holes 362 with a diameter of about 1 cm at intervals of 1 m from the road shoulder side to the median strip side, and a slit hole in the vicinity of the center side water collection pit B2 closest to the median strip side. 361 is provided. The slit hole 361 is, for example, about 1 to 2 cm wide and about 10 to 20 cm long. In FIG. 2, the slit hole 361 and the round hole 362 are drawn rather large. As shown in FIG. 2, the slit holes 361 and the round holes 362 are arranged in a row in the extending direction of the rainwater drainage pipe D, and the round holes 362 are also arranged on the opposite side of the steam supply tube 36 by 180 degrees in the circumferential direction. The slit holes 361 are arranged in a row in the extending direction of the rainwater drainage pipe D. From the slit hole 361 and the round hole 362, the heating steam sent out from the mixing device 33 into the steam supply tube 36 via the supply hose SH and the steam supply pipe 3411 blows out.

The drain discharge pipe 37 is inserted near the end of the lining material 10 on the side of the median strip. In FIG. 2, for the convenience of illustration, the drain discharge pipe 37 is shown inserted into the upper portion of the lining material 10, but in reality the drain discharge pipe 37 is inserted into the lower end portion of the lining material 10. is A certain amount of heat is taken away from the heating steam by the lining material 10 , so that part of the heating steam changes to drain in the internal space IS of the lining material 10 . A pipe provided with a valve 371 is connected to the drain discharge pipe 37 . By opening the valve 371 , the drain generated in the internal space IS is discharged to the outside of the lining material 10 .

The exhaust device 38 includes a silencer 381 , an exhaust duct 382 and a second compressor 383 . This exhaust device 38 corresponds to an example of a pipeline lining exhaust device. A space having a cross-sectional area larger than that of the exhaust hose CH is formed inside the silencer 381 . In addition, a sound deadening material is arranged inside the sound deadening device 381 . The heating steam contains sound waves such as the sound of the boiler 31, and there are cases where the heating steam generates sounds when it passes through each part. The muffler 381 muffles these sounds.

The exhaust duct 382 is detachably connected to the silencer 381 . Inside the exhaust duct 382, a steam discharge channel 382a (see FIG. 3) through which steam flows is formed. The exhaust duct 382 has an exhaust port 382b that exhausts the steam that has passed through the steam exhaust passage 382a to the outside. The configuration of this exhaust duct 382 will be described in detail later.

The second compressor 383 compresses outside air (air) and sends it out. This second compressor 383 corresponds to an example of an outside air supply device. The exhaust duct 382 and the second compressor 383 are connected by an air supply hose AH. The air supply hose AH is provided with a second air valve AH1. By operating the second air valve AH1 to adjust the throttle amount, it is possible to adjust the flow rate of the outside air sent into the steam discharge passage 382a.

3(a) is a front view showing the exhaust duct shown in FIG. 2, and FIG. 3(b) is a cross-sectional view of the exhaust duct shown in FIG. 3(a) taken along the line AA.

As shown in FIGS. 3A and 3B, the exhaust duct 382 has a duct main body 3821 and branch pipes 3822 . The duct body 3821 extends vertically and has a cylindrical inner peripheral surface 382c. The duct main body 3821 is made of a thin metal plate, and has a cylindrical outer peripheral surface. An exhaust port 382b is formed at the upper end of the duct body 3821 . A notch 382e is formed at the lower end of the duct main body 3821 for attaching the exhaust duct 382 to the silencer 381 (see FIG. 2). Although not shown, a notch 382e having the same shape is also formed on the opposite side of the duct main body 3821 by 180 degrees in the circumferential direction. The silencer 381 has an outer periphery with a diameter substantially equal to the inner periphery of the duct main body 3821, and is provided with a protrusion (not shown) that protrudes upward. A pair of bosses projecting in the circumferential direction are formed on the projecting portion. The exhaust duct 382 is detachably connected to the silencer 381 by fitting the pair of bosses into the pair of notches 382e of the duct main body 3821 and rotating the exhaust duct 382 by a predetermined angle about its extending direction as the rotation center direction. be. As shown in FIG. 3(b), inside the duct main body 3821, a steam discharge passage 382a is formed, the downstream end of which serves as an exhaust port 382b. The steam that has been muffled by the muffler 381 passes through the protrusions provided on the muffler 381 and flows into the steam discharge flow path 382a.

The branch pipe 3822 is connected to the duct body 3821 at a downstream portion of the steam discharge flow path 382a in the middle of the duct body 3821 in the extending direction. In other words, the branch pipe 3822 is connected to the duct body 3821 at a position closer to the exhaust port 382b at the downstream end than the upstream end of the steam discharge passage 382a defined by the duct body 3821 . The branch pipe 3822 can also be said to be a confluence pipe that merges with the duct main body 3821 . The branch pipe 3822 is installed at an angle of 45 degrees with respect to the steam discharge channel 382a so as to approach the steam discharge channel 382a as it goes downstream in the steam discharge channel 382a. This inclination angle is preferably 15 degrees or more and 75 degrees or less. As shown in FIG. 3(b), a coupling port 382d is formed at the coupling portion between the duct main body 3821 and the branch pipe 3822. As shown in FIG. As shown in FIG. 2, the projecting end of the branch pipe 3822 is connected to the air supply hose AH extending from the second compressor 383 . As a result, the outside air supplied from the second compressor 383 passes through the air supply hose AH and the branch pipe 3822 and is sent from the coupling port 382d to the steam discharge passage 382a. As described above, the inclination angle of the branch pipe 3822 with respect to the steam discharge channel 382a is preferably 15 degrees or more and 75 degrees or less. When the inclination angle is less than 15 degrees, it takes time for the steam flowing through the steam discharge channel 382a and the outside air supplied from the second compressor 383 to be sent to the steam discharge channel 382a to mix in the steam discharge channel 382a. It takes. For this reason, there is a possibility that some of them may be exhausted from the exhaust port 382b without being mixed. Further, if the inclination angle of the branch pipe 3822 exceeds 75 degrees, the effect of promoting the downstream flow of the steam flowing through the steam discharge passage 382a is weakened, and the steam is sent to the steam discharge passage 382a. There is a possibility that part of the outside air may flow back and block the flow of steam flowing through the steam discharge passage 382a.

Next, a pipeline lining construction method for lining the rainwater drainage pipeline D with the pipeline lining system 3 using the lining material 10 described so far will be described.

FIG. 4 is a flow chart showing the process of lining a storm drain pipe at a construction site with the pipe lining system shown in FIG.

At the construction site, preparations for construction are first made (step S1). Here, the lane on the shoulder side of the expressway is closed to traffic, and the lining material 10 is transported to the construction site by a refrigerator truck. Next, the inside of the rainwater drainage pipe D is washed and the rainwater drainage pipe D is inspected using a television camera running in the rainwater drainage pipe D (step S2). By this investigation, the location of damage in the rainwater drainage pipe D is confirmed.

Subsequently, the lining material 10 is pulled into the rainwater drainage pipe D together with the steam supply tube 36 inserted inside (step S3). The lining material 10 is pulled into the rainwater drainage pipe D from the insulated vehicle together with the steam supply tube 36 through the shoulder-side water collection pit B1. Here, first, a winch is installed in the vicinity of the entrance of the center side catchment pit B2, the rear end of the wire wound around the winch is inserted into the center side catchment pit B2, and the wire is passed through to the shoulder side catchment pit B1. Let Then, the head portion of the lining material 10 is tied together with the head portion of the steam supply tube 36 at the rear end portion of the wire, and the wire is wound up with a winch to supply the lining material 10 with steam to the rainwater drainage pipe D to be lined. retract with tube 36; When the wire is wound until the head portion of the lining material 10 and the steam supply tube 36 comes out of the connection portion of the lining rainwater drainage pipe D with the center side catch basin B2, the winch is stopped to complete the drawing. At the completion of drawing-in, the ends of the lining material 10 and the steam supply tube 36 on the side of the median strip are protruded from the rainwater drainage pipe D into the center-side catch basin B2. On the other hand, the shoulder-side end of the lining material 10 is not drawn into the rainwater drainage pipe D and remains in the shoulder-side catch basin B1.

Next, the lining material 10 is set in the rainwater drainage pipe D (step S4). In this set, first, the wire binding the lining material 10 and the head portion of the steam supply tube 36 is removed. Then, the ends of the lining material 10 and the steam supply tube 36 on the side of the median strip are pressed against the central fastening drum 351 and fastened to the central fastening drum 351 by the central fastening member 352 . As a result, the lining material 10 and the end of the steam supply tube 36 on the side of the median strip are sealed. Also, the steam supply pipe 3411 is fitted to the end of the steam supply tube 36 on the road shoulder side, and the steam supply tube 36 is tightened by the tube tightening member 343 from the outer peripheral side. Further, the cylindrical portion of the road shoulder plug member 341 is fitted to the end of the lining material 10 on the road shoulder side, and the road shoulder side tightening member 342 is tightened from the outer peripheral side of the lining material 10 . As a result, the road shoulder between the lining materials 10 is also sealed, and only the steam supply pipe 3411 to which the steam supply tube 36 is connected and the steam discharge pipe 3412 connect the inside and outside of the lining material 10 .

In addition, in step S4, the boiler vehicle is parked in the vicinity of the entrance of the shoulder-side water collection basin B1 instead of the refrigerator vehicle. As a result, the first compressor 32, the mixing device 33 and the exhaust device 38 are installed on the ground. Also, the exhaust device 38 is installed on the ground. One end of the supply hose SH is connected to the mixing device 33 , and the other end is connected to the steam supply pipe 3411 of the shoulder plug member 341 . One end of the exhaust hose CH is connected to the steam discharge pipe 3412 of the shoulder plug member 341 , and the other end is connected to the silencer 381 of the exhaust device 38 .

When the above preparations are completed, the first compressor 32 is started by fully opening the exhaust valve CH1, and outside air is started to be supplied to the mixing device 33, the supply hose SH, the steam supply pipe 3411 and the steam supply tube . As a result, the steam supply tube 36 expands into a columnar shape, and outside air begins to blow into the internal space IS of the lining material 10 through the slit hole 361 and the round hole 362 . If the outside air continues to be supplied even after the steam supply tube 36 is inflated, the amount of outside air blown out from the slit hole 361 and the round hole 362 increases, and the inside space IS is filled with the blown outside air. As the exhaust valve CH1 is gradually closed, the lining material 10 expands and expands in diameter. When the lining material 10 is sufficiently inflated, the outer film layer 102 of the lining material 10 is pressed against the inner peripheral wall of the rainwater drainage pipe D. The pressing state (pressure) of the lining material 10 against the rainwater drainage pipe D is confirmed, and the opening degree of the exhaust valve CH1 is adjusted so that the pressing state is just right (step S5).

Subsequently, the steam valve 311 is opened to send out the superheated steam from the boiler 31, and the mixing device 33 mixes the superheated steam with the outside air from the first compressor 32 and starts supplying it to the internal space IS. At this time, the temperature of the heating steam delivered from the mixing device 33 is adjusted by adjusting the opening of the steam valve 311 . Further, if necessary, the degree of opening of the first air valve 321 and the degree of opening of the exhaust valve CH1 are adjusted to adjust the flow rate of the heating steam sent out from the mixing device 33 and the pressure of the lining material 10 against the rainwater drainage pipe D. Adjust pressure. The heating steam delivered from the mixing device 33 is adjusted to approximately 80 to 100.degree. Details of this adjustment will be described later. The sent heating steam blows out from the slit hole 361 and the round hole 362 into the internal space IS, contacts the extension layer 112, and the lining material 10 is kept pressed against the inner peripheral wall and heated by the heating steam. be done. Then, the supply of the heating steam is continued until the heating time obtained in advance by experiments has elapsed, as will be described later. Further, immediately after starting the supply of heating steam, the second compressor 383 is started, the second air valve AH1 is fully opened, and outside air is sent to the steam discharge passage 382a defined by the duct main body 3821 (step S6). . At the stage of step S5, the steam valve 311 may be opened to send out the superheated steam from the boiler 31 and supply the heating steam to the internal space IS. In that case, it is preferable to start the second compressor 383wp at the stage of step S5 to send outside air into the steam discharge passage 382a.

In this step S6, the heating steam supplied to the internal space IS on the side of the median strip of the lining material 10 flows through the internal space IS toward the steam discharge pipe 3412 provided in the shoulder-side plug member 341, and the temperature gradually increases. is declining. The steam discharged from the steam discharge pipe 3412 is sent to the silencer 381 through the exhaust hose CH. The steam that has passed through the silencer 381 flows through the steam discharge passage 382a of the exhaust duct 382, and after or while being mixed with the outside air sent from the second compressor 383, is discharged to the atmosphere from the exhaust port 382b. Here, when the mixed gas of steam and outside air starts to be exhausted from the exhaust port 382b, the opening degree of the second air valve AH1 may be adjusted according to the state of the mixed gas, such as the color of the mixed gas and the emission sound of the steam. The drain generated in the internal space IS in step S6 is discharged to the outside of the lining material 10 through the drain discharge pipe 37 and the pipe provided with the valve 371 as described above.

FIG. 5 is a graph roughly showing an example of changes in the temperature of heating steam supplied to the internal space of the lining material. In the graph shown in FIG. 5, the horizontal axis represents time and the vertical axis represents temperature (° C.). A solid line graph roughly represents the temperature of the heating steam supplied to the internal space IS. The temperature here is the set temperature of the heating steam delivered from the mixing device 33 , that is, the set temperature of the mixing device 33 . Furthermore, the temperature of the lining material 10 itself, more specifically, the temperature between the outer film layer 102 of the lining material 10 and the rainwater drainage pipe D is measured at each of the shoulder side end and the median strip side end of the lining material 10. are doing. However, it is possible to measure the temperature between the base layer 101, the base layer 111, the outer film layer 102 and the base layer 101, or the stretched layer 112 and the base layer 111 at each end of the lining material 10. good. The temperature at the bottom of the lining material 10 may be measured, or the temperature at the top of the lining material 10 may be measured. The dashed-dotted line graph roughly represents the temperature measured at the end of the lining material 10 on the median strip side, and the dotted line graph roughly represents the measured temperature at the end of the lining material 10 on the shoulder side. Alternatively, an optical fiber may be installed over the entire length of the lining material 10 and the temperature of the lining material may be measured at a plurality of points to control the temperature of the heating steam delivered from the mixing device 33 .

The temperature change of the lining material 10 occurs with a delay with respect to the temperature change of the heating steam supplied to the internal space IS. Furthermore, the temperature change at the road shoulder side end of the lining material 10 occurs later than the temperature change at the median strip side end of the lining material 10 .

In step S6 described above, the steam valve 311 is opened, the heating steam is first raised to about 80° C., and the heating steam at about 80° C. is supplied to the internal space IS for a while. Since the thermosetting resin generates curing heat when curing, the temperature of the lining material 10 rises once, reaches a peak temperature (approximately 90° C. in the example shown in FIG. 5), and then decreases. The temperature of the thermosetting resin itself rises to over 100° C. at the peak of its curing exotherm. In FIG. 5, the heat-resistant temperature of the extension layer 112 is represented by a chain double-dashed line. The heat resistance temperature of the extension layer 112 is 120° C., and when the temperature of the thermosetting resin rises to this temperature, the extension layer 112 melts. If heating steam at a high temperature (for example, 100°C) is supplied before the generation of curing heat, the temperature of the thermosetting resin may reach 120°C due to superimposition of the curing heat. For this reason, until the curing heat is generated, a slightly lower heating steam is supplied in anticipation of the curing heat generation, so that the temperature of the thermosetting resin does not reach 120 ° C even if the curing heat generation is superimposed. ing.

On the other hand, after it is detected that the temperature of the lining material 10 has changed from an increase to a decrease after curing heat is generated, the temperature of the heating steam is increased. More specifically, after it is detected that the temperature of the lining material 10 changes from an increase to a temperature decrease, and furthermore, when it is detected that the temperature of the lining material 10 has settled down to a substantially constant temperature, mixing is performed. The set temperature of the device 33 is raised from 80°C to 100°C. At the time when the temperature of the lining material 10 changes from rising to falling and settles down to a substantially constant temperature, curing of the thermosetting resin is completed to a sufficient level. By supplying heating steam at a higher temperature from this state, the strength of the thermosetting resin can be increased. In the example shown in FIG. 5, the temperature of the lining material 10 is heated to approximately the same temperature as the peak temperature. The temperature of the heating steam (set temperature of the mixing device 33) may be determined according to the degree of improvement in the strength of the thermosetting resin. For example, if the strength can be expected to be improved by heating the lining material 10 to a temperature higher than the peak temperature (80°C), it is possible to heat the lining material 10 to a higher temperature within a range not exceeding the heat resistant temperature (120°C). preferable.

When the thermosetting resin is further heated by the heating steam whose temperature has been raised, the increase in strength does not change after a certain period of time has passed. Keep The heating time may be 30 minutes to 90 minutes. By continuing to supply the heating steam, the thermosetting resin impregnated in the base layers 101 and 111 hardens and increases in strength while the lining material 10 is pressed against the inner peripheral wall of the rainwater drainage pipe D. In addition, the inner peripheral wall of the rainwater drainage pipe D is lined with the lining material 10, and a new independent pipeline is formed inside the inner peripheral wall of the rainwater drainage pipe D with the lining material 10.

Then, in step S7 shown in FIG. 4, the boiler 31 is stopped and the steam valve 311 is closed to supply outside air (room temperature air) instead of heating steam to cool the hardened lining material 10 .

After that, the pipe ends of the lining material 10 are finished (step S8). In this pipe mouth finishing, the lining material 10 is applied to the shoulder-side end and the median strip-side end of the rainwater drainage pipe D so as to match the joints with the shoulder-side water collection pit B1 and the center-side water collection pit B2. Cut and cure the cut part.

Finally, the state of the inner peripheral wall formed by the stretched layer 112 of the lining material 10 is finally confirmed by a television camera (step S9), the construction site is cleaned up (step S10), and the rainwater drainage pipe D is lined. The whole process ends.

According to the exhaust device 38 and the pipeline lining system 3 using the exhaust device 38 described above, outside air is added to the steam flowing through the steam discharge channel 382a, so the concentration of the steam exhausted from the exhaust port 382b is reduced. . Therefore, the steam discharged from the exhaust port 382b becomes nearly transparent. In addition, the addition of outside air increases the release speed of the steam exhausted from the exhaust port 382b, making it easier for the exhausted steam to scatter upward. As a result, it is possible to prevent the exhausted steam from obstructing the visibility of drivers of vehicles passing around. Furthermore, the odor of the resin impregnated in the lining material 10 may be added to the exhausted steam, but the addition of outside air makes the odor less intense. These suppress the influence of the exhausted steam on the surroundings.

Further, since the branch pipe 3822 is installed at an angle with respect to the steam discharge passage 382a so as to approach the steam discharge passage 382a toward the downstream side of the steam discharge passage 382a, The outside air sent into the steam discharge channel 382a flows in the direction toward the exhaust port 382b in the steam discharge channel 382a. For this reason, the outside air does not hinder the downstream flow of the steam flowing through the steam discharge passage 382a, and rather facilitates the flow of steam downstream of the steam discharge passage 382a, thereby facilitating exhaust from the exhaust port 382b. be done. As a result, it is easier to send new heating steam from the mixing device 33 into the internal space IS. Furthermore, since the branch pipe 3822 is connected to the duct main body 3821 at the downstream portion of the steam discharge passage 382a, the connecting portion is relatively close to the exhaust port 382b. As a result, the outside air sent from the second compressor 383 tends to flow smoothly toward the exhaust port 382b where the flow resistance is reduced, so that the outside air prevents the steam flowing through the steam discharge passage 382a from moving downstream. It is suppressed that it becomes. As a result, it is easier to send new heating steam from the mixing device 33 into the internal space IS. In addition, since the exhaust duct 382 is connected to the silencer 381, the noise of the exhausted steam can be suppressed. In addition, since the silencer 381 is located upstream of the exhaust duct 382, the outside air supplied from the second compressor 383 does not pass through the silencer 381 and is stagnant within the silencer 381, thereby hindering the exhaust of steam. No fear. Furthermore, since the exhaust duct 382 can be detachably attached to the silencer 381, for example, at a construction site where the influence of the exhausted steam does not need to be considered, the exhaust duct 382 without the branch pipe 3822 can be connected to the silencer 381 for construction. It becomes easy to respond flexibly according to the environment of the site.

Next, a modified example of the exhaust device 38 will be described. In the following description, components having the same names as those described so far may be given the same reference numerals as those used so far, and overlapping descriptions may be omitted.

6(a) is a side view showing a modification of the exhaust duct shown in FIG. 3, and FIG. 6(b) is a plan view of the exhaust duct shown in FIG. 6(a).

As shown in FIGS. 6(a) and 6(b), the exhaust duct 382 of this modification differs from the exhaust duct 382 shown in FIG. The branch pipe 3822 is connected to the duct body 3821 so that the outside air supplied by the second compressor 383 (see FIG. 2) and sent to the steam discharge passage 382a swirls along the inner peripheral surface 382c of the duct body 3821. there is Specifically, when viewed from the longitudinal direction of the exhaust duct 382, the branch pipe 3822 protrudes in the tangential direction of the inner peripheral surface 382c with respect to the duct main body 3821. As shown in FIG. As a result, the outside air supplied by the second compressor 383 is sent from the tangential direction to the inner peripheral surface 382c toward the downstream side of the steam discharge passage 382a into the steam discharge passage 382a.

The exhaust device 38 using the exhaust duct 382 of this modified example and the pipeline lining system 3 using the exhaust device 38 also have the same effect as the previous embodiment. In addition, by using the exhaust duct 382 of this modified example, the outside air sent from the second compressor 383 creates a swirling flow in the steam discharge passage 382a. Due to the swirling flow, the steam flowing through the steam discharge passage 382a and the outside air sent from the second compressor 383 are easily mixed. In addition, since the mixed gas in which the steam and the outside air are mixed is exhausted from the exhaust port 382b while swirling, the exhausted mixed gas is easily diffused in the atmosphere. As a result, it is possible to more reliably prevent the steam from obstructing the visibility of drivers of vehicles passing around. Also, as the gas mixture diffuses in the atmosphere, the vapor smells less intense.

The present invention is not limited to the embodiments and modifications described so far, and can be modified in various ways within the scope of the claims. For example, in the present embodiment, an example in which the exhaust device 38 is applied to the pipe lining system 3 lining the rainwater drainage pipe D for draining rainwater on the expressway HW was used, but the rainwater drainage pipe for draining rainwater on a general road is used. The exhaust device 38 may also be applied to a pipeline lining system 3 lining other pipelines such as sewage pipelines carrying sewage and underground power lines containing power cables. Further, the pipeline lining system 3 to which the exhaust device 38 of the present embodiment is applied can be used not only for repairing existing pipelines but also for forming the inner peripheral surface of new pipelines. The lining material 10 in the present embodiment may be of any form as long as it is cured by heating, and may be in the form of a sheet, for example. Furthermore, the branch pipe 3822 may be installed so as to be connected at right angles to the duct main body 3821, and the steam discharge flow is increased so as to approach the steam discharge flow channel 382a as it goes upstream in the steam discharge flow channel 382a. It may be installed at an angle of more than 90 degrees with respect to the path 382a. However, in these installation modes, the outside air sent from the second compressor 383 to the steam discharge channel 382a flows into the steam discharge channel 382a in the direction opposite to the exhaust port 382b at a certain rate. The outside air may interfere with the downstream flow of the steam flowing through the steam discharge channel 382a. On the other hand, since turbulence is generated in the steam discharge channel 382a, it is expected that the steam flowing through the steam discharge channel 382a is easily mixed with the inflowing outside air. Furthermore, the branch pipe 3822 may be connected to the duct main body 3821 at the upstream portion of the steam discharge channel 382a. However, when connected in this way, the distance from the connecting portion to the exhaust port 382b is relatively long. may become difficult to smoothly flow toward the downstream side of the steam discharge channel 382a. On the other hand, since the distance from the connecting portion to the exhaust port 382b is longer, it can be expected that the outside air flowing into the steam discharge channel 382a is easily mixed with the steam.

In addition, even if the constituent elements are included only in the description of each of the modified examples described above, the constituent elements may be applied to other modified examples.

3 pipeline lining system 10 lining material 38 exhaust device (pipe line lining exhaust device)
381 silencer 382 exhaust duct 382a steam discharge channel 382b exhaust port 383 second compressor (external air supply device)
3821 Duct main body 3822 Branch pipe D Rainwater drainage pipe

Claims (5)

A steam discharge channel through which steam generated by heating a thermosetting resin impregnated in a lining material lining the pipe flows is formed inside, and an exhaust port for discharging the steam to the outside is provided at the downstream end of the steam discharge channel. an exhaust duct;
An exhaust device for lining a pipeline, comprising: an external air supply device for supplying external air to the steam discharge passage. The exhaust duct has a duct body that defines the steam discharge channel, and a branch pipe that allows external air supplied from the external air supply device to flow into the steam discharge channel,
The branch pipe is installed at an angle with respect to the steam discharge channel so as to approach the steam discharge channel toward the downstream side of the steam discharge channel. 2. The exhaust system for lining pipelines according to 1. 3. The pipe lining exhaust device according to claim 2, wherein the branch pipe is connected to the duct main body at a downstream portion of the steam discharge passage. The duct body has a cylindrical inner peripheral surface,
4. The branch pipe according to claim 2, wherein the outside air supplied by the outside air supply device flows into the steam discharge channel so as to swirl along the inner peripheral surface. Exhaust device for pipeline lining. A silencer is provided to suppress noise of the steam discharged from the exhaust port,
5. The pipe lining exhaust system according to claim 1, wherein said exhaust duct is connected to said silencer.

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