JP6958900B2 - Heating device - Google Patents

Description

The present invention relates to a heating device that heats a curable resin impregnated in a lining material, which is cured by heating.

There are pipelines buried in the ground, such as sewage pipelines through which sewage flows and underground conduits in which power cables are housed. This pipeline may be cracked, the joint portion may be separated to form a gap, or the joint portion may be displaced to form a step due to an earthquake or aging. In addition, even if the pipe is not deteriorated, a gap or a step may be formed in the joint portion when a new pipeline is laid. For example, when a new mounting pipe (branch pipe) branched from the main pipe is laid, a gap or a step may occur at the connecting portion between the main pipe and the mounting pipe.

When repairing a pipeline having cracks or gaps, it is preferable to perform the repair without excavation from the viewpoint of reducing the repair cost and minimizing traffic obstacles. Therefore, a technique has been proposed in which a tubular lining material impregnated with a curable resin whose curing is promoted by heating is pressed against the inner peripheral surface of a pipeline to perform lining (for example, Patent Document 1).

In the pipeline repair described in Patent Document 1, a tubular lining impregnated with a thermosetting resin is used for lining a mounting pipe connecting a main pipe and a basin formed by digging about 1 m from the ground surface, for example. The material is inverted and inserted into the mounting pipe from the inlet on the box side of the mounting pipe by compressed air. The tip of the cylindrical lining material inserted in reverse reaches the connecting portion between the main pipe and the mounting pipe, and the outlet of the heat-resistant hose connected from the boiler on the ground is located inside the connecting portion. Next, the heated air heated by the heater on the ground is blown out from the outlet, and the heated air is supplied to the space surrounded by the inner peripheral surface of the inverted-inserted tubular lining material, and the lining material is put into the pipeline. While pressing against the peripheral surface, the curing of the thermosetting resin impregnated in the lining material is promoted by the heat of the heated air.

Japanese Unexamined Patent Publication No. 06-71753

However, the total length of the mounting pipe may reach up to 10 m, and the length of the heat-resistant hose is longer than that. When the heated air that has passed through the heat-resistant hose of 10 m or more is blown out from the outlet located at the tip of the space, the temperature drops considerably, and the thermosetting resin impregnated in the lining material is cured. Problems such as not being able to promote sufficiently have been confirmed. For example, even if air is heated to 200 ° C by a boiler installed on the ground and then supplied, the heated air blown out from the outlet located at the tip of the space may drop to 30 ° C. Has been reported.

In view of the above circumstances, an object of the present invention is to provide a heating device capable of sufficiently accelerating the curing of the curable resin impregnated in the lining material.

The heating device of the present invention that solves the above object
A heating heater that is inserted into the space surrounded by the inner peripheral surface of a cylindrical lining material impregnated with a curable resin that accelerates curing by heating.
A hose that connects to the heater and supplies fluid to the heater from outside the space.
A discharge port that discharges the fluid supplied from the hose and heated by the heater into the space, and
A mesh member that covers the discharge port at intervals from the discharge port,
It is characterized by having a temperature measuring means for measuring the temperature of the fluid discharged from the mesh of the mesh member.
again,
The temperature measuring means may measure the temperature of the fluid discharged from the mesh of the mesh member by using a thermocouple locked to the mesh member.
again,
A heating heater that is inserted into the space surrounded by the inner peripheral surface of a cylindrical lining material impregnated with a curable resin that accelerates curing by heating.
A hose that connects to the heater and supplies fluid to the heater from outside the space.
The heating device may have a discharge port for discharging the fluid supplied from the hose and heated by the heating heater into the space.

According to the heating device of the present invention, the heating heater is inserted into the space. In the space, the heating heater and the discharge port can be brought close to each other, and the fluid immediately after being heated is discharged from the discharge port to sufficiently accelerate the curing of the curable resin impregnated in the lining material. The curable resin may be a resin that does not cure at room temperature and does not cure unless heated, or a resin that cures at room temperature but accelerates curing by heating. Further, the lining material is a so-called bottomed cylindrical lining material, and the tip is closed. On the other hand, the rear end may be closed or open. Further, the fluid may be air, water or water vapor. Further, the heater and the discharge port may be adjacent to each other, only a part thereof may be overlapped, or the whole may be overlapped.

Further, it is preferable that the discharge port is covered with a mesh member at a distance from the discharge port.

A high-temperature fluid can be discharged from the discharge port, and if the discharge port directly hits the inner peripheral surface of the lining material, the inner peripheral surface may be damaged by heat. The mesh member is provided to prevent the discharge port from directly hitting the inner peripheral surface of the lining material.

Further, a sliding member that slides on the inner peripheral surface of the lining material is provided.
The heating heater is inserted into the space by sliding the sliding member on the inner peripheral surface of the lining material.
The sliding member may be in a mode in which the distance from the discharge port remains constant.

According to this aspect, the heating heater can be easily slid in the space by the sliding member, and the sliding member is not a complicated mechanism and is suitable for miniaturization and weight reduction. That is, three sliding members are provided at 120-degree intervals or four at 90-degree intervals in the circumferential direction around the discharge port, and each of the three or four sliding members is with the discharge port. The structure is much simpler than the one in which the outer diameter connecting three or four sliding members is increased or decreased so as to match the inner diameter of the lining material by changing the distance between the two. This is because it is not necessary to maintain the discharge port at the radial center position of the space. Even if the discharge port is located at any position in the radial direction of the space, that is, at a position deviated from the radial center position, a sufficiently hot fluid is discharged from the discharge port, so that the lining material is impregnated. The curing of the cured resin can be sufficiently promoted without bias in the circumferential direction of the lining material.

The sliding member may be a rotatable roller or a sled-shaped member. Further, the sliding member may be provided in a plurality (for example, three or four) in the circumferential direction, or may be provided in only one.

Further, it is preferable that the hose has a strength that allows the heater to be pushed in when the heater is inserted into the space.

That is, it is preferable that the hose has a strength that does not normally buckle when the heater is inserted into the space. As the material used for the hose, a material having high strength is more suitable than a material having a high heat resistant temperature. According to this hose, the heater can be efficiently inserted into the space.

According to the heating device of the present invention, the curing of the curable resin impregnated in the lining material can be sufficiently promoted.

It is a figure which shows the pipeline repair device installed at a construction site. It is a flowchart which shows the flow of the pipeline repair method for repairing a mounting pipe. It is a figure for demonstrating the lining material forming process, the storage process, and the attachment process shown in FIG. It is a figure which shows the state which the lining material was inverted from the reversing port to the length which can be inserted into a mounting pipe. It is a figure which shows the state after starting the reverse pressure welding process (step S5) shown in FIG. It is a figure which shows the state which the reverse pressure welding process (step S5) was completed. It is a figure which shows the mouth part. It is a figure which shows the heating apparatus of this embodiment. It is a figure which shows the state that the heating process was started. It is a figure which shows the state that the main body part of a heating device is moved from the front end part of the space surrounded by the inner peripheral surface of a lining material toward the rear end part. It is a figure for demonstrating the collection process using a storage part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The heating device of the present invention can be used for repairing the inner surface of a pipeline such as a sewer pipe, and can be particularly preferably used for repairing the inner surface of a mounting pipe branched from the main pipe. Therefore, in the following description, an embodiment used for repairing the inner surface of the mounting pipe will be described as an example.

FIG. 1 is a diagram showing a pipeline repair device installed at a construction site, and FIG. 2 is a flowchart showing a flow of a pipeline repair method for repairing an attachment pipe.

In the description here, the mounting pipe 71 connecting the main pipe 72 and the basin 73 is to be repaired. The length of the mounting pipe 71 in the extending direction, that is, the length from the basin-side opening 71a located on the basin 73 side to the main pipe-side opening 71b located on the main pipe 72 side is about 5 m to 10 m. It may exceed 10 m.

First, as shown in step S1 of FIG. 2, a device installation step of installing the pipeline repair device 1 shown in FIG. 1 is carried out around the pipeline to be repaired. Before carrying out the device installation process, a high-pressure washer is used to remove deposits and the like inside the mounting pipe 71, and a TV camera or the like is used to check the situation inside the mounting pipe 71 and the mounting pipe 71 and the main pipe. It is desirable to check the connection status with 72.

In FIG. 1, the pipeline repair device 1 is installed in the vicinity of the box 73 to which the attachment pipe 71 to be repaired is connected. The pipeline repair device 1 shown in FIG. 1 has a storage unit 2 in which a lining material is stored and a mouth portion 3 connected to the storage unit 2. Further, FIG. 1 also shows the compressed air supply means 4 connected to the storage portion 2 of the pipeline repair device 1.

The storage unit 2 has a winding member 21 for winding the lining material and a pressure regulator 22 to which the compressed air supply means 4 is connected to receive the compressed air. The storage unit 2 of the present embodiment stores the lining material in a state of being wound around the winding member 21 by rotating the handle 211 of the winding member 21. The storage state of the lining material in the storage unit 2 is not limited to this, and may be, for example, a storage state in which the lining material is folded and stored.

The mouth portion 3 has a reversing port 31 open on the left side in FIG. The reversing port 31 is an opening to be attached with one end of the lining material stored in the storage portion 2 folded outward, and the folded portion of the lining material is provided by an end fixture 311 such as a band or a belt. It is fixed.

The compressed air supply means 4 has a compressor 41 and a hose 42. The hose 42 connects the pressure regulator 22 of the storage unit 2 and the compressor 41. The compressed air produced by the compressor 41 flows through the hose 42 and is supplied from the pressure regulator 22 into the housing 2.

Subsequently, the lining material forming step shown in FIG. 2 is carried out (step S2). Here, the base hose and the calibration hose that have been transported from the factory to the construction site are used. The base hose is made by coating the outside of a cylindrically processed non-woven fabric with an opaque film, by drawing a special knit woven fabric into an opaque tube, or by processing a chopped strand mat into a cylindrical shape. A tube drawn into a permeable tube or the like can be used. The calibration hose is a polyester fiber woven fabric coated with soft vinyl chloride, plays a role of pressing the base hose from the inside toward the mounting pipe at the time of construction, and is collected after the construction. These base hoses and calibration hoses are cut to a suitable length at the construction site in consideration of the length of the mounting pipe 71, the depth and size of the basin 73, and the like shown in FIG. Prepare a calibration hose that is slightly longer than the base hose. In addition, the base hose is impregnated with a thermosetting resin using a roller or the like at the construction site. The thermosetting resin to be impregnated is not particularly limited, but an unsaturated polyester resin or an epoxy resin can be exemplified, and a curing agent is added. A curing accelerator is added to the unsaturated polyester resin, and an adhesive and a defoaming agent are added to the epoxy resin.

FIG. 3 is a diagram for explaining a lining material forming step, a storage step, and a mounting step shown in FIG. As shown in FIGS. 3A and 3B, the tip of the base hose 81 impregnated with the thermosetting resin is tied with a string-like body 80 such as a rope, and the string-like body 80 is wound up. The base hose 81 is completely pulled into the calibration hose 82 from the opening 82e on one end side of the calibration hose 82 to form the lining material 8 (step S2). In the lining material 8 formed in step S2, the calibration hose 82 is longer than the base hose 81, the calibration hose 82 is located on the outside, and the base hose 81 is located on the inside of the calibration hose 82. There is.

Subsequently, the string-like body 80 that bound the tip of the base hose 81 is unwound, and this time, as shown in FIG. 3C, one end of the calibration hose 82 is tied and closed. The one end closed here becomes the tip when the calibration hose 82 finishes reversing, and is therefore hereinafter referred to as the tip 82a. Next, one end of the reversing belt 83 is tied to the tied tip 82a. The other end of the reversing belt 83 is attached to the winding member 21 of the storage portion 2. By rotating the handle 211, the reversing belt 83 is wound around the winding member 21, and eventually the lining material 8 also has the reversing port 31. And is wound around the winding member 21 as shown in FIG. 3 (d). As a result, the lining material 8 is stored in the storage unit 2 (step S3).

Further, as shown in FIG. 3D, the end of the lining material 8 on the side opposite to the side wound by the winding member 21 is fixed at the end in a state of being folded outward from the reversing port 31. It is attached to the mouth 3 by the tool 311 (step S4). FIG. 3 (e) is an enlarged cross-sectional view showing a portion where the lining material 8 is attached to the reversing port 31 of the mouth portion 3. As shown in FIG. 3E, when the lining material 8 is attached to the reversing port 31 of the mouth portion 3, the base hose 81 is located inside the calibration hose 82 in the mouth portion 3, and the reversing port 31 is used. At the portion folded outward, the base hose 81 is located outside the calibration hose 82.

Subsequently, preparations are made to carry out the reverse pressure welding step (step S5) shown in FIG.

FIG. 4 is a diagram showing a state in which the lining material is inverted from the inversion port to a length that can be inserted into the mounting pipe.

When the compressor 41 of the compressed air supply means 4 is operated and the compressed air is supplied from the pressure regulator 22 into the storage portion 2 as shown by the arcuate arrow in FIG. 4, FIGS. 3 (d) and 3 (e) are shown. As shown in the above, the lining material 8 attached to the reversing port 31 is sent out from the reversing port 31 while being reversed by the pressure of the supplied compressed air. Here, the pressure regulator 22 is operated when the length of the lining material 8 sent out from the reversing port 31 while reversing reaches a level that can be slightly inserted into the mounting pipe 71 from the box-side opening 71a. Temporarily stop the supply of compressed air.

FIG. 5 is a diagram showing a state after the reverse pressure welding step (step S5) shown in FIG. 2 is started, and FIG. 6 is a diagram showing a state in which the reverse pressure welding step (step S5) is completed.

The tip of the lining material 8 inverted halfway is inserted into the mounting pipe 71 through the box-side opening 71a, and the preparation for carrying out the inverted pressure welding step (step S5) shown in FIG. 2 is ready.

Next, the pressure regulator 22 is operated to restart the supply of compressed air into the storage unit 2, and the reverse pressure welding step (step S5) is started. When the compressed air starts to be supplied to the storage portion 2 again, as shown in FIG. 5, the lining material 8 inserted into the mounting pipe 71 is inverted by the pressure of the supplied compressed air toward the main pipe 72. It will grow. Eventually, as shown in FIG. 6, the tip of the base hose 81 stays near the edge of the main opening 71b, whereas the tip of the calibration hose 82 is from the main opening 71b to the inside of the main 72. The reverse pressure welding step (step S5) is completed. The tip 82a of the calibration hose 82 is tied and closed, and one end of the reversing belt 83 is tied to the tip 82a. A reversing belt 83 extending from the tip 82a runs in the space (space surrounded by the calibration hose 82) S surrounded by the inner peripheral surface of the lining material 8 shown in FIG. 6, and the reversing belt 83 is wound. It is connected to the taking member 21. An appropriate tension can be applied to the lining material 8 inserted into the mounting pipe 71 by the pressure of the compressed air by manually operating the winding member 21 to which the reversing belt 83 is connected. Further, when the lining material 8 does not proceed smoothly, it is preferable to perform the winding operation by the winding member 21. As a result, the lining material 8 can be smoothly inverted and inserted into the mounting pipe 71.

Further, as shown in an enlarged view of the circled portion in FIG. 6, the lining material 8 inverted and inserted into the mounting pipe 71 has a base hose 81 superimposed on the inner surface of the mounting pipe 71, and the base thereof. The calibration hose 82 is located inside the hose 81. The pressure of the supplied compressed air is applied to the calibration hose 82, and as shown by an arrow in the enlarged view of FIG. 6, the base hose 81 is pressure-welded toward the mounting pipe 71 via the calibration hose 82. Will be done. This pressure welding corresponds to the pressure welding in the reverse pressure welding step (step S5) shown in FIG.

Next, the separation step (step S6) shown in FIG. 2 is carried out.

FIG. 7 is a diagram showing a mouth portion.

The mouth portion 3 is fixed to the storage portion 2 by a tightening ring 32. FIG. 7A is a plan view showing the tightening ring 32. The tightening ring 32 has a lever 321 and a ring member 322. The lever 321 can be rotated between the clamped position and the unclamped position, and FIG. 7A shows the lever 321 in the clamped position. When the lever 321 is rotated to the clamp position, the diameter of the ring member 322 is reduced to the tightened state. On the other hand, when the lever 321 is rotated to the unclamped position, the diameter of the ring member 322 is increased and the lever 321 is released. When fixing the mouth portion 3 to the storage portion 2, after rotating the lever 321 to the unclamped position, the opening 23 of the storage portion 2 shown in FIG. 1 has a connection opening 33 opposite to the reversing port 31. The lever 321 is rotated to the clamp position in the state where the above is matched.

On the contrary, in the separation step (step S6) shown in FIG. 2, the lever 321 is rotated to the unclamping position while the mouth portion 3 is fixed to the storage portion 2, and the mouth portion 3 is removed from the storage portion 2. .. Next, the connection opening 33 of the mouth portion 3 is closed with a lid. The storage portion 2 from which the mouth portion 3 has been removed in this separation step can be reused for the steps from the storage step (step S3) to the insertion step (step S6) in the pipeline repair of other attachment pipes. It becomes easy to repair the mounting pipes in parallel.

FIG. 7B shows a plan view of the lid body, and FIG. 7C shows a front view of the lid body.

The lid 35 is provided with a hose hole 350 through which a hose of a heating device (not shown) is passed, three holes 351 to 353, a peephole 354, and a pair of handles 355, and the lid 35 is provided with a pair of handles 355 on the back surface side. A U-bolt 356 to which the reversing belt 83 is connected is provided. Each hole 350 to 353 is provided with a socket protruding toward the front side. A pressure gauge (not shown) is mounted in any one of the three holes 351 to 353. Auxiliary air is supplied from the other hole, and the remaining one hole is used as an exhaust hole.

FIG. 8 is a diagram showing a heating device of this embodiment.

The heating device 5 of the present embodiment includes a main body 51 and a hose 52 connected to the rear side of the main body 51. The main body 51 has an equilateral triangular tubular frame 510, and a mesh member 511 is attached to the tip (front end) of the tubular frame 510. FIG. 8A is a view (rear view) of the main body 51 as viewed from the rear side. As shown in FIG. 8A, sliding rollers 512 are provided at three locations on the main body 51 at intervals of 120 degrees in the circumferential direction with the cylindrical frame 510 as the center. FIG. 8B shows the heating device 5 from a position (2 o'clock position) just between the sliding roller 512 at the 12 o'clock position and the sliding roller 512 at the 4 o'clock position shown in the figure (a). Corresponds to the side view seen. In FIG. 8B, the left side of the figure is the front side (tip side), and the right side is the rear side. Two sliding rollers 512 are provided in each of the front-rear directions. The sliding roller 512 may be replaced with a sled-shaped sliding member. The alternate long and short dash line shown in FIG. 8A is a line representing the inner peripheral surface 8u of the lining material 8. The outer diameter of connecting the sliding rollers 512 provided at three locations at intervals of 120 degrees in the circumferential direction is much smaller than the diameter of the inner peripheral surface 8u of the lining material 8, and as shown in FIG. 8A, The sliding roller 512 at the 4 o'clock position and the sliding roller 512 at the 8 o'clock position come into contact with the inner peripheral surface 8u of the lining material 8. In some cases, only one type of sliding roller 512 (for example, only the sliding roller 512 at the position of 12) may come into contact with the inner peripheral surface 8u of the lining material 8. Each sliding roller 512 is rotatably attached by a mounting stay 513 fixed to an equilateral triangular tubular frame 510, and the mounting stay 513 does not bend or expand. Therefore, when each sliding roller 512 slides on the inner peripheral surface 8u of the lining material 8, the distance from the cylindrical frame 510 does not change and remains constant. On the other hand, the mounting stay 513 of the sliding roller 512 bends or expands so that the tubular frame 510 always coincides with the center point of the space S surrounded by the inner peripheral surface 8u of the lining material 8. Therefore, a structure is also conceivable in which the outer diameter of connecting the sliding rollers 512 provided at three locations at intervals of 120 degrees in the circumferential direction is increased or decreased. However, when this structure is adopted, not only the structure becomes complicated, but also it becomes easy to break down. In addition, the device becomes large and heavy, and the cost also increases. In the present embodiment, a discharge port 515a for discharging heated air is provided on an extension line of the central axis of the tubular frame 510. However, since sufficiently hot air is discharged from this discharge port 515a, the lining is provided. The curing of the curable resin impregnated in the material 8 can be sufficiently promoted without bias in the circumferential direction of the lining material 8. Therefore, it is not necessary to always match the discharge port 515a with the center point of the space S, and it is not necessary to adopt the above structure. Therefore, the heating device 5 can be made smaller and lighter, and the cost can be reduced. be able to.

As shown in FIG. 8B, a heater unit 515 is arranged inside the cylindrical frame 510 as shown by a dotted line. When the inner diameter of the mounting pipe is φ100 mm to 300 mm, the heater unit 515 is supplied with air at a flow rate of 50 to 5000 L / min, and the supplied air is supplied to a maximum of several hundreds by a built-in electric heating mechanism (not shown). It can be heated to ° C. and discharged from the discharge port 515a at the tip. The discharge port 515a is provided on an extension line on the tip end side of the central axis of the cylindrical frame 510, and is not separated from the tip end of the electric heating mechanism by as much as 1 cm. The positional relationship between the discharge port 515a and the electric heating mechanism may be adjacent to each other. Alternatively, a part of the electric heating mechanism may be exposed and a discharge port 515a may be formed around the exposed part, or the entire electric heating mechanism may be exposed and the entire exposed electric heating mechanism may be exposed. There may be a discharge port 515a around the. The discharge port 515a is covered with a mesh member 511 at intervals from the discharge port 515a. Therefore, the discharge port 515a does not come into direct contact with the inner peripheral surface 8u of the lining material 8, and the heated air discharged from the discharge port 515a is discharged from a large number of meshes of the mesh member 511. High-temperature heated air can be discharged from the discharge port 515a, and when the discharge port 515a directly hits the inner peripheral surface 8u (calibration hose 82 in this case) of the lining material 8, the inner peripheral surface 8u heats up. A mesh member 511 is provided to prevent the discharge port 515a from directly hitting the inner peripheral surface 8u of the lining material 8 because the mesh member 511 may be damaged.

Further, a thermocouple 516 is connected to the terminal protruding from the tubular frame 510. The tip of the thermocouple 516 is locked to the mesh member 511, and the thermocouple 516 can directly measure the temperature of the heated air discharged from the mesh of the mesh member 511.

Air supplied to the electric heating mechanism built in the heater unit 515 flows through the hose 52 connected to the rear side of the main body 51. Further, the hose 52 also contains a conducting wire for supplying power to the electric heating mechanism built in the heater unit 515, and further contains a conducting wire for the thermocouple 516. The conducting wire may be pulled out of the hose 52.

In the separation step (step S6) shown in FIG. 2, when the mouth portion 3 is removed from the storage portion 2, the other end of the reversing belt 83 attached to the take-up member 21 is removed from the take-up member 21, and FIG. It is connected to the U bolt 356 of the lid body 35 shown in 1. Further, before closing the connection opening 33 of the mouth portion 3 with the lid body 35, a hose 52 having a tip connected to the main body portion 51 of the heating device 5 shown in FIG. 8 is provided from the rear end to the hose provided on the lid body 35. After passing through the hole 350 and inserting the main body 51 into the space S surrounded by the inner peripheral surface 8u of the lining material 8, the connection opening 33 of the mouth 3 is closed with the lid 35, and the separation step ( Step S6) is completed.

When the separation step (step S6) is completed, the insertion step (step S7) shown in FIG. 2 is carried out, and the main body 51 of the heating device 5 shown in FIG. 8 is surrounded by the inner peripheral surface 8u of the lining material 8. The space (the space surrounded by the calibration hose 82) S is inserted up to the tip end portion.

In the previous separation step, the space S surrounded by the inner peripheral surface 8u of the lining material 8 from the time when the mouth portion 3 is removed from the storage portion 2 until the connection opening 33 of the mouth portion 3 is closed by the lid 35. Although the pressure drops once, in the insertion step, auxiliary air is supplied from any one of the three holes 351 to 353 of the lid 35 shown in FIG. 7 (b), and the pressure in the space S is increased. The volume of the space S becomes sufficiently large. On this basis, the main body 51 of the heating device 5 is gradually pushed into the space S by the hose 52. The hose 52 is made of nylon and is hard. Therefore, when the main body 51 is pushed into the space S, the hose 52 is normally not buckled. That is, the hose 52 has a strength that allows the main body 51 to be pushed in when the main body 51 is inserted into the space S. The hose 52 is not limited to nylon, and may be made of a material having a certain strength. That is, as the material used for the hose 52, a material having high strength is more suitable than a material having a high heat resistant temperature.

When the main body 51 of the heating device 5 is inserted up to the tip of the space S, the insertion step is completed and the heating step (step S8) shown in FIG. 2 is started.

FIG. 9 is a diagram showing how the heating process is started.

The main body 51 of the heating device 5 reaches the tip of the space (space surrounded by the calibration hose 82) S surrounded by the inner peripheral surface 8u of the lining material 8 shown in FIG. The rear end portion of the lining material 8 from the basin side opening 71a to the inside of the basin 73 and further to the ground side is raised substantially vertically, and the rear end portion of the lining material 8 is an inverted mouth portion 3. It remains connected to the mouth 31. In the mouth portion 3, the connection opening 33 is closed with a lid 35.

One end of the reversing belt 83 is connected to the tip 82a of the calibration hose 82 shown in FIG. 9, and the other end of the reversing belt 83 is attached to the U bolt 356 of the lid 35 (see FIG. 7C). It is tied.

Further, the hose 52 extending from the main body 51 of the heating device 5 shown in FIG. 9 goes out to the ground side through the hose hole 350 of the lid 35 and is connected to the compressor 41 of the compressed air supply means 4. .. Further, a pressure gauge 36 is attached to the lid 35 shown in FIG.

Further, the conducting wire passing through the hose 52 for supplying power to the electric heating mechanism is taken out from the hose 52 on the ground side and via a controller (not shown) for adjusting the heating temperature of the electric heating mechanism. , Connected to a generator (not shown). Further, the lead wire of the thermocouple 516 that passed through the hose 52 is also taken out from the hose 52 on the ground side, connected to a temperature measuring means (not shown), and discharged from the mesh of the mesh member 511. The temperature of the heated air is monitored.

In the heating step (step S8), compressed air is supplied to the main body 51 of the heating device 5 that has reached the tip portion through the hose 52. Further, power is started to the electric heating mechanism (not shown) built in the heater unit 515 shown in FIG. 8 (b), and the compressed air supplied from the hose 52 is heated by the tip portion of the lining material 8 to heat it. The generated air is immediately discharged from the discharge port 515a, and is discharged from a large number of meshes of the mesh member 511 to the tip portion in the space S. The temperature of the heated air emitted from the multiple meshes of the mesh member 511 is monitored by the thermocouple 516, and the temperature of the heated air is the temperature at which the calibration hose 82 does not melt, and the thermosetting resin. The controller (not shown) that adjusts the heating temperature of the electric heating mechanism is operated while looking at the temperature measuring means (not shown) so that the temperature at which the curing is promoted (for example, 60 ° C. to 80 ° C.) is reached. Further, the pressure in the space S can be measured by the pressure gauge 36 mounted on the lid 35, and the pressure of the compressed air is adjusted by operating the pressure regulator 22 by observing the value of the pressure gauge 36. do. As shown in an enlarged view of the circled portion in FIG. 9, the base hose 81 is pressed toward the mounting tube 71 via the calibration hose 82 by the heated air that has just been heated in the space S. , The base hose 81 is heated, and the curing of the thermosetting resin impregnated in the base hose 81 is promoted.

In the present embodiment, the air in the space S is released to the atmosphere from the exhaust hole of any one of the three holes 351 to 353 provided in the lid 35, but for exhaust. The heated air exhausted from the holes may be returned to the compressor 41 and circulated.

Further, in the present embodiment, the main body 51 of the heating device 5 is moved in the space S in the extending direction of the mounting pipe 71.

FIG. 10 is a diagram showing a state in which the main body of the heating device is moved from the front end portion of the space surrounded by the inner peripheral surface of the lining material toward the rear end portion.

Since the air in the space S is opened to the atmosphere from the exhaust hole in the lid 35, the heated air moves to the lid 35 side after being discharged from a large number of meshes of the mesh member 511. I will do it. In the space S, in the vicinity of the large number of meshes of the mesh member 511, the amount of heat required to accelerate the curing of the thermosetting resin is sufficient, but a certain distance from the large number of meshes of the mesh member 511. At the above distance, the amount of heat required to accelerate the curing of the thermosetting resin is lost. Therefore, the hose 52 connected to the main body 51 is pulled by a predetermined distance every predetermined time, and the positions of a large number of meshes of the mesh member 511 are moved to the rear end side. Alternatively, the movement of the main body 51 (a large number of meshes of the mesh member 511) may be continuously moved by slowing the moving speed instead of such a stepwise movement. In any case, the base hose 81 was impregnated by keeping the positions of the numerous meshes of the mesh member 511 within a certain area until the thermosetting resin was completely cured or almost cured. The thermosetting resin is gradually cured from the front end side (main pipe 72 side) toward the rear end side. In FIG. 10, the main body 51 is pulled up to the vicinity of the box-side opening 71a. When the main body 51 is moved to the lid 35 side (when pulled up), as shown in FIG. 8A, the sliding roller 512 at the 4 o'clock position and the sliding roller at the 8 o'clock position 512 comes into contact with the inner peripheral surface 8u of the lining material 8 and slides. Alternatively, only one of the sliding rollers 512 (for example, only the sliding roller 512 at the position 12) may come into contact with the inner peripheral surface 8u of the lining material 8 and slide.

After the main body 51 is pulled up until it is completely pulled out from the box-side opening 71a, the heating step of step S8 is completed. That is, after the main body 51 is completely ejected from the box-side opening 71a, the power supply to the electric heating mechanism (not shown) of the main body 51 is stopped first, and then the compressor 41 is stopped.

Further, when the heat of curing is generated to a considerably high temperature by the polymerization reaction when the thermosetting resin is cured, the heat of curing can be used to accelerate the curing of the resin. For example, when the heat resistant temperature of the calibration hose 82 is raised and heated steam of 100 ° C. is discharged from the discharge port 515a, the curing heat generation temperature may reach 120 ° C. When heating is started from the tip of the space surrounded by the inner peripheral surface of the lining material, the curing heat generated at the tip gradually propagates (heat transfer) toward the rear end, and reaches the opening 71a on the box side. Curing progresses. At this time, once the heat of curing is generated at the tip portion, the heat-curable resin may be cured only by the heat of curing propagating toward the rear end, or the heating device 5 is rearranged. By heating while moving to the end side, it is possible to promote the propagation of the curing heat to the rear end side, or it is possible to assist the heating itself. Further, the heating device 5 may be continuously moved toward the rear end side, or may be repeatedly moved and stopped toward the rear end side. In particular, in the latter case, the heat of curing is surely generated at the stop, the heat of curing is repeatedly propagated over a short distance to the next stop, and the heat of cure is used to efficiently heat the heat. Curing of the curable resin can be accelerated.

Here, when a photo-curing resin is used, the photo-curing resin is cured only at the portion irradiated with light, so even if the rear end side is cured, it is unknown whether the intermediate portion is irradiated until the light is cured. , It is difficult to determine whether the photocuring resin has been cured over the entire length of the mounting tube. On the other hand, by utilizing the property that the curing heat generated in the thermosetting resin propagates from the front end side to the rear end side as described above, if the resin on the rear end side is cured, the resin on the front end side is also cured. Therefore, the completion of curing of the thermosetting resin over the entire length of the mounting tube can be determined only by confirming the completion of curing on the rear end side. That is, the curing method here is to complete the curing of the curable resin of the tubular lining material impregnated with the thermosetting resin whose curing is promoted by heating from the front end portion to the rear end side of the lining material. A curing method for curing to a position, in which a heating step of heating the tip portion of the lining material and the curable resin impregnated on the rear end side of the tip portion of the lining material after the heating step is performed are performed. The curing method is characterized by having a curing step of curing and a curing confirmation step of confirming that the curable resin at the curing completion position of the lining material is cured. In this curing method, when the curable resin at the curing completion position is uncured, the curing step is continued, and when it is confirmed that the curing step is cured, the curing step is terminated. Further, the curing step may be a step of heating the curable resin from the tip portion toward the curing completion position, or the curing heat generated at the tip portion propagates from the tip portion to the curing completion position. It may be a step of waiting for the curing to be carried out, or it may be a step of assisting by heating the propagation of the heat of curing or by heating the curing by the propagation of the heat of curing.

After the temperature inside the mounting tube 71 has dropped to about room temperature, the recovery step (step S9) shown in FIG. 2 is performed. In this recovery step, the simplest method is to manually pull the reversing belt 83. As a result, the tip 82a of the calibration hose 82 is pulled out to the ground side. Since the thermosetting resin of the base hose 81 is pressed against the mounting pipe 71 and the thermosetting resin is cured, the calibration hose 82 is peeled off from the base hose 81, and the base hose 81 remains inside the mounting pipe 71.

When the calibration hose 82 is completely removed from the mounting pipe 71, the base hose 81 is cut at the box side opening 71a, and the calibration hose 82 and the cut base hose 81 are collected.

It is also possible to carry out the collection step using the storage unit 2.

FIG. 11 is a diagram for explaining a collection process using the storage unit.

As shown in FIG. 11, the lid 35 is removed from the mouth 3, and the mouth 3 is connected to the storage 2. Further, the compressed air supply means 4 is also connected to the storage unit 2. Further, the reversing belt 83 is attached to the take-up member 21. Next, the reversing belt 83 is wound by the winding member 21 by rotating the handle 211 while supplying air from the compressed air supply means 4 into the lining material 8 with a very weak pressure, and the calibration hose 82 is used. The tip 82a of the hose is pulled toward the ground side. The enlarged view of the circled portion shown in FIG. 11 shows that the base hose 81 remains inside the mounting pipe 71, and the inner peripheral surface of the mounting pipe 71 is lined by the base hose 81. There is.

Even in the recovery step using the storage unit 2, when the calibration hose 82 is completely taken out from the mounting pipe 71, the base hose 81 is cut at the box side opening 71a, and the calibration hose 82 and the cut base hose 81 are recovered. .. In the recovery process using the storage unit 2, the calibration hose 82 is peeled off while supplying weak pressure air into the lining material 8, so that an appropriate pressure is applied to the calibration hose 82, and the calibration hose is recovered at the time of recovery. It is possible to avoid a situation in which the 82 is twisted or its shape is deformed.

Since it is not necessary to close the mouth portion 3 in the recovery step, a winding means dedicated to recovery of the calibration hose 82 may be used separately from the storage portion 2.

Finally, if necessary, the box side opening 71a is finished with a pipe opening finishing material, and if the hardened base hose 81 protrudes from the main pipe side opening 71b, the pipe line repair is completed by cutting it. ..

In the pipeline repair using the heating device 5 shown in FIG. 8 described above, the electric heating mechanism is inserted into the space S surrounded by the inner peripheral surface of the lining material 8, and the electric heating mechanism is inserted. Since the heated air is supplied into the space S from the immediate vicinity of the lining material, the curing of the curable resin impregnated in the lining material is sufficiently promoted by the air immediately after heating. As a result, the heating step of step S8 shown in FIG. 2 is shortened, and the time for the entire pipeline repair is also shortened.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, the resin to be heated is not limited to a thermosetting resin, and may be a resin that cures at room temperature but accelerates curing by heating. For the lining material, the calibration hose is inverted and inserted into the base hose in the factory, and at the construction site, the base hose in which the calibration hose is inverted is pulled into the pipe as it is, and then inside the calibration hose. The heating device 5 may be inserted into the. Further, although the example of the mounting pipe 71 has been described, the pipes other than the mounting pipe 71 can also be constructed by using the heating device 5. Further, water may be supplied to the electric heating mechanism of the heating device 5 instead of air, and water vapor may be discharged from the discharge port 515a.

Finally, I will add what I have explained so far.

(Appendix 1)
A tubular lining material impregnated with a curable resin impregnated with a curable resin that accelerates curing by heating is invertedly inserted into a pipe line, and the curable resin is cured by heating the lining material with a heating fluid to cure the pipe. In a pipeline repair system that repairs the inner surface of a road
A storage unit for storing the lining material and
A mouth portion having a reversing port connected to the storage portion and attached with one end of the lining material stored in the storage portion opened.
A compressed fluid is supplied to the storage portion, and the lining material having one end attached to the reversing port is sent out from the reversing port while being inverted toward the inside of the pipeline by fluid pressure, and the lining material is sent out from the reversing port while being inverted. Compressible fluid supply means that presses against the inner surface,
A heating means that is inserted into the lining material inverted in the pipeline and heats the supplied fluid in the lining material.
A pipeline repair system comprising a hose connected to the heating means and supplying a fluid to the heating means from the outside of the lining material.

(Appendix 2)
The storage portion can be separated from the mouth portion by leaving the mouth portion to which one end of the lining material is attached on the lining material side while the heating means is still inserted in the lining material. The pipeline repair system according to Appendix 1, which is characterized in that it is a simple one.

(Appendix 3)
The pipeline repair system according to Appendix 1 or 2, wherein the heating means is movable in the extending direction of the pipeline in the lining material inverted in the pipeline.

(Appendix 4)
A tubular lining material impregnated with a curable resin impregnated with a curable resin that accelerates curing by heating is invertedly inserted into a pipe line, and the curable resin is cured by heating the lining material with a heating fluid to cure the pipe. In the pipeline repair method for repairing the inner surface of the road,
A storage process for storing the lining material in the storage unit, and
An attachment step of attaching the lining material stored in the storage portion to the reversing opening of the mouth portion connected to the storage portion with one end opened.
The compressed fluid is supplied from the compressed fluid supply means to the storage portion, and the lining material having one end attached to the reversing port is sent out from the reversing port while being inverted toward the inside of the pipeline by fluid pressure, and the lining material is sent out. Inversion pressure welding step of pressure welding to the inner surface of the pipeline,
An insertion process for inserting a heating means for heating the supplied fluid into the lining material inverted in the pipeline.
A fluid is supplied to the heating means inserted in the insertion step, and the curable resin is cured while the lining material is pressed against the inner surface of the pipeline by the fluid heated in the lining material by the heating means. A pipeline repair method comprising a heating step to promote.

(Appendix 5)
With the heating means still inserted in the lining material, the mouth portion to which one end of the lining material is attached is left on the lining material side, and the storage portion is separated from the mouth portion. The pipeline repair method according to Appendix 4, which is characterized by having a step.

(Appendix 6)
The pipeline according to Appendix 4 or 5, wherein the heating step is a step of moving the heating means in the lining material inverted in the pipeline in the extending direction of the pipeline. Repair method.

(Appendix 7)
The reverse pressure welding step is a step of reversing the lining material in which the base hose impregnated with the curable resin is inserted into the calibration hose so that the calibration hose is located inside the base hose.
The pipeline repair method according to any one of Supplementary note 4 to 6, further comprising a recovery step of recovering the calibration hose after the curable resin is cured by carrying out the heating step.

1 Pipeline repair device 2 Storage part 21 Winding member 3 Port part 31 Reversing port 35 Lid body 4 Compressed air supply means 5 Heating device 51 Main body part 511 Mesh member 512 Sliding roller 515 Heater unit 515a Discharge port 52 Hose 71 Mounting pipe 71a basin side opening 71b main pipe side opening 72 main pipe 73 basin 8 lining material 8u inner peripheral surface 81 base hose 82 calibration hose 83 reversing belt

Claims (4)

A heating heater that is inserted into the space surrounded by the inner peripheral surface of a cylindrical lining material impregnated with a curable resin that accelerates curing by heating.
A hose that connects to the heater and supplies fluid to the heater from outside the space.
A discharge port that discharges the fluid supplied from the hose and heated by the heater into the space, and
A mesh member that covers the discharge port at intervals from the discharge port,
A heating device including a temperature measuring means for measuring the temperature of a fluid discharged from the mesh of the mesh member. The first aspect of claim 1, wherein the temperature measuring means measures the temperature of a fluid discharged from the mesh of the mesh member by using a thermocouple locked to the mesh member . Heating device. A sliding member that slides on the inner peripheral surface of the lining material is provided.
The heating heater is inserted into the space by sliding the sliding member on the inner peripheral surface of the lining material.
The heating device according to claim 1 or 2, wherein the sliding member has a constant distance from the discharge port. The heating according to any one of claims 1 to 3, wherein the hose has a strength capable of pushing the heating heater into the space when the heating heater is inserted into the space. Device.

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