JP2020082408A - Repairing method for existing pipe and repairing system for existing pipe - Google Patents

Abstract

To provide a repairing method for an existing pipe and a repairing system for the existing pipe capable of efficiently curing a photocurable lining material according to the existing pipe or the circumstances of its surroundings while preventing degradation of the lining material due to a temperature rise.SOLUTION: A repairing method for an existing pipe of this invention includes a curing step of causing a tubular lining material 20 to adhere to an inner wall face of an existing pipe 70 and curing the lining material by radiating light using a mobile light radiation device 30 introduced into an inside of the lining material. The light radiation device 30 includes radiation sections 31 and surface temperature sensors 34 that measure surface temperatures of the lining material 20. In the curing step, at least one of the followings is performed: lowering outputs of the radiation sections and increasing a supply amount of compressed air, when a measured temperature by one of the surface temperature sensors 34 is equal to or lower than a predetermined light radiation allowable temperature Tand the measured temperature is equal to or higher than a first surface temperature T.SELECTED DRAWING: Figure 1

Description

The present invention relates to an existing pipe repair method and an existing pipe repair system, and more particularly to an existing pipe repair method and an existing pipe repair system using a photo-curable lining material.

Existing pipes buried in the ground, such as sewer pipes, have deteriorated due to long-term use, and their useful lives are generally about 50 years. In recent years, the number of sewer pipes that have exceeded the service life is increasing, and as a result of dilapidated sewer pipes, groundwater and sediment around the sewer pipes flow into the pipe line due to cracks in the pipe line, etc. Cavities are created, causing the ground to sink. In addition, the sewer pipes are susceptible to ground movements such as earthquakes, and for some reasons, some kind of repair is required at a predetermined time.

As a method of repairing such a buried existing pipe, a method of forming an inner layer pipe with a photocurable lining material is known (for example, Patent Document 1).

In this repair method, after introducing an uncured tubular light-curable lining material into the existing pipe in a folded state, both ends of the lining material are closed by closing members, and compressed air is injected into the closed space. The lining material is supplied and brought into close contact with the inner wall surface of the existing pipe from the folded state. In this state, hot air is supplied into the lining material to raise the temperature of the lining material. After that, the lining material is hardened by irradiating the inner surface of the lining material with light by a movable light irradiation device introduced inside the lining material, and the inner surface of the existing pipe is covered with the hardened lining material (inner layer pipe). ..

JP, 2008-000924, A

In the repair method described in Patent Document 1, the internal temperature of the lining material is raised before the light is applied to the lining material by the light irradiation device, thereby shortening the curing time by the light irradiation and increasing the curing efficiency. be able to.

However, the time required to cure the lining material depends on the environmental conditions of the existing pipe and its surroundings during light irradiation, such as the presence or absence of groundwater around the existing pipe, the material of the existing pipe, and the temperature change due to the reaction heat of light curing. Since the temperature of the lining material is overheated more than necessary due to the reaction heat from light irradiation, part of it deteriorates, or conversely, the lining material is cooled by the groundwater around the existing pipe. As a result, the time required for curing may increase.

The present invention has been made in view of the above problems, and an object thereof is to prevent the deterioration of the lining material due to the temperature rise when performing light irradiation on the photo-curable lining material, while preserving the existing pipe or An object of the present invention is to provide a method for repairing an existing pipe and a system for repairing an existing pipe, which can efficiently harden a lining material according to the environmental conditions around it.

The invention according to claim 1 for achieving the above object,
By adhering the tubular lining material to the inner wall surface of the existing pipe buried in the ground, while supplying compressed air to the inside of the lining material, by the movable light irradiation device introduced inside the lining material, In a method of repairing an existing pipe including a curing step of curing the lining material by irradiating the inner surface of the lining material with light,
The light irradiation device has an irradiation unit that irradiates light, and a surface temperature sensor that measures the surface temperature of the lining material,
In the curing step,
When the temperature measured by the surface temperature sensor is equal to or lower than a preset allowable light irradiation temperature and the measured temperature is equal to or higher than a predetermined first surface temperature, a decrease in output of the irradiation unit and a supply amount of compressed air Of at least one of the above.

According to this configuration, the temperature measured by the surface temperature sensor is equal to or lower than the preset allowable light irradiation temperature, that is, the temperature at which overheating of the lining material does not occur, and the measured temperature is equal to or higher than the predetermined first surface temperature. In such a high temperature state, by increasing at least one of the output of the irradiation unit and the supply of compressed air, it is possible to suppress an increase in the surface temperature of the lining material. Thereby, the lining material can be efficiently cured by continuously performing light irradiation while preventing overheating of the lining material.

The invention according to claim 2 is the method for repairing an existing pipe according to claim 1,
A plurality of the surface temperature sensors are provided at intervals in the moving direction of the light irradiation device,
In the curing step,
When the measured temperature of all the surface temperature sensors is equal to or lower than a preset light irradiation allowable temperature and the measured temperature of at least one surface temperature sensor selected in advance is equal to or higher than the first surface temperature, the irradiation unit Is reduced and at least one of the compressed air is increased.

According to this configuration, the surface temperature of the lining material can be detected more accurately by the plurality of surface temperature sensors, and at least one preselected one of the plurality of surface temperature sensors has a predetermined first surface temperature. In the above case, by suppressing the rise in the surface temperature of the lining material, it is possible to more reliably prevent the lining material from overheating and further improve the curing quality of the lining material.

The invention according to claim 3 is the method for repairing an existing pipe according to claim 2,
In the curing step,
A predetermined second surface in which the measured temperatures of all the surface temperature sensors are equal to or lower than a preset allowable light irradiation temperature and the measured temperature of at least one surface temperature sensor selected in advance is lower than the first surface temperature. When the temperature is equal to or lower than the temperature, at least one of a decrease in moving speed of the light irradiation device, an increase in output of the irradiation unit, and a decrease in compressed air supply amount is performed.

According to this configuration, the temperature measured by all the surface temperature sensors is within the temperature range in which overheating of the lining material does not occur, and the surface temperature sensor detected in advance is lower than the first surface temperature. When the temperature is lower than the predetermined second surface temperature, at least one of the decrease of the moving speed of the light irradiation device, the increase of the output, and the decrease of the compressed air supply amount is applied to the lining material. Curing can be accelerated by sufficiently irradiating light or raising the temperature.

The invention according to claim 4 is the method for repairing an existing pipe according to claim 2 or 3,
The surface temperature sensor is a front surface temperature sensor located at the frontmost part in the moving direction of the light irradiation device, a rear surface temperature sensor located at the rearmost part in the moving direction, the front surface temperature sensor and the rear surface temperature sensor. And one or more intermediate surface temperature sensors located between
In the curing step, the moving speed of the light irradiation device, the output of the irradiation unit, and the supply of compressed air so that the measured temperature of at least one intermediate surface temperature sensor is equal to or higher than the measured temperature of the rear surface temperature sensor. It is characterized by controlling at least one of the quantities.

According to this configuration, since the temperature of the lining material rises when the photo-curing reaction starts and the surface temperature starts to decrease when the photo-curing reaction ends, the measured temperature of at least one middle surface temperature sensor is the rear surface temperature. By controlling the temperature to be equal to or higher than the temperature measured by the sensor, the photocuring reaction can be completed when the rear surface temperature sensor passes. This makes it possible to surely cure the lining material.

The invention according to claim 5 is the method for repairing an existing pipe according to claim 4,
Of the plurality of surface temperature sensors, the movement of the light irradiation device is such that the measured temperature of the intermediate surface temperature sensor adjacent to the rear surface temperature sensor is equal to or higher than the measured temperature of the rear surface temperature sensor and is the highest temperature. At least one of the speed, the output of the irradiation unit, and the supply amount of compressed air is controlled.

According to this configuration, it is possible to reduce unnecessary irradiation of light and increase the curing efficiency of the lining material while ensuring the curing of the lining material.

The invention according to claim 6 is the method for repairing an existing pipe according to any one of claims 1 to 5,
It is arranged between the existing pipe and the lining material, and includes an outer surface temperature sensor for measuring the temperature of the outer peripheral surface of the lining material,
In the curing step, when the temperature measured by the outer surface temperature sensor is equal to or lower than a predetermined low threshold temperature, the moving speed of the light irradiation device decreases, the output of the irradiation unit increases, and the amount of compressed air supplied. At least one of the reductions is performed.

According to this configuration, the outer peripheral surface of the lining material that comes into contact with the inner wall of the existing pipe is cooled by the effect of the existing pipe cooled by the surrounding groundwater. When the temperature of the outer peripheral surface of the lining material is low, that is, when the temperature of the outer peripheral surface of the lining material is low, the outer peripheral surface temperature of the lining material is decreased by decreasing the moving speed of the light irradiation device and/or increasing the output of the irradiation unit. Can be increased to properly cure the lining material.

The invention according to claim 7 is
With a tubular lining material that is introduced into the existing pipe buried in the ground,
Air supply means for supplying compressed air to the inside of the lining material,
A movable light irradiation device having a surface temperature sensor for measuring the surface temperature of the lining material and an irradiation unit for irradiating light,
A control device that is connected to the air supply unit and the light irradiation device, and controls the air supply unit and the light irradiation device based on the temperature measured by the surface temperature sensor;
By the light irradiation device introduced into the inside of the lining material, in the repair system of the existing pipe for irradiating light from the inside of the lining material to cure the lining material,
The control device is
When the temperature measured by the surface temperature sensor is equal to or lower than the preset light irradiation allowable temperature and the measured temperature is equal to or higher than the predetermined first surface temperature, the output of the irradiation unit is reduced and the air supply means is used. At least one of the increase of the compressed air supply amount is performed.

According to this configuration, the temperature measured by the surface temperature sensor is equal to or lower than the preset light irradiation allowable temperature, that is, within the temperature range in which overheating of the lining material does not occur, and the detected surface temperature is the predetermined first surface. When the temperature is higher than or equal to the temperature, at least one of decreasing the output of the irradiation unit and increasing the amount of compressed air supplied can suppress an increase in the surface temperature of the lining material. Thereby, the lining material can be efficiently cured by continuously performing light irradiation while preventing overheating of the lining material.

According to the existing pipe repairing method and the existing pipe repairing system of the present invention, when performing light irradiation on the photo-curing lining material, the existing pipe and its part are prevented while preventing deterioration due to temperature rise of the lining material. The lining material can be efficiently cured according to the surrounding environmental conditions.

Sectional drawing which shows typically the repair system of the existing pipe which concerns on this invention. Configuration diagram of the repair system. The side view which shows a light irradiation device. The figure explaining a repair process. The figure explaining a repair process. The graph which shows the example of temperature distribution by a surface temperature sensor. The figure explaining a repair process. The side view which shows the modification of a light irradiation device. Sectional drawing explaining the example of a change of a repair system.

FIG. 1 is a sectional view schematically showing an existing pipe repair system 10 according to the present invention, and FIG. 2 is a configuration diagram of the repair system 10. The repair system 10 of the present embodiment is applied to repair a sewer pipe 70 which is an existing pipe buried in the ground. The sewer pipe 70 is disposed between the two manholes 72 and 73 and communicates them. On the upstream side and the downstream side of the sewer pipe 70, water stop members 74 and 75 for blocking the flow of the sewage at the time of repair work are installed. As the water blocking members 74 and 75, a rubber packer that expands by supplying a fluid such as air to the inside can be used.

The repair system 10 includes a lining material 20 that forms a rehabilitation pipe, and a light irradiation device 30 that irradiates the lining material 20 with light, and also includes a compressor (air supply means) 12, a styrene concentration detector 14, and monoxide. A carbon concentration detector 16, a deodorizing device 18, and a control device 40 are provided. The control device 40 is connected to each of the light irradiation device 30, the compressor 12, the styrene concentration detector 14, the carbon monoxide concentration detector 16 and the deodorizing device 18 by wire or wirelessly, and receives data received from these devices. It is possible to record, and it is possible to control the operating states of the light irradiation device 30, the compressor 12, and the deodorizing device 18 based on the received data.

The lining material 20 is flexible in the uncured state, and is formed into a tubular shape that conforms to the shape of the sewer pipe 70 so as to have an outer diameter corresponding to the inner diameter of the sewer pipe 70 after curing. As the material of the lining material 20, for example, an impregnated base material made of fiber or the like (as an example, a fiber base material such as glass fiber or polyester fiber or a nonwoven fabric such as felt) is impregnated with a photocurable resin composition. can do. The photocurable resin composition may include a polymerizable resin, a polymerizable unsaturated monomer and a photopolymerization initiator, for example, a polymerizable resin such as an unsaturated polyester resin or a vinyl ester resin in a solvent such as styrene. A melted product can be used. As the photopolymerization initiator, for example, a polymerization initiator for ultraviolet rays which accelerates the polymerization of the resin by ultraviolet rays or a photopolymerization initiator which can accelerate the polymerization of the resin by the actions of both ultraviolet rays and visible rays can be used.

The lining material 20 includes an inner film and an outer film that protect the inner surface and the outer surface, respectively. As a material for the inner film and the outer film, for example, a polyethylene film, a polypropylene film, a polyethylene terephthalate film or the like can be used. The inner film is transparent to at least the light emitted from the light irradiation device 30, and the outer film does not transmit the light emitted from the light irradiation device 30 to the outside of the photocurable lining material 20. It is preferable to use a light-shielding film as used in the photo-curing reaction. As the light-shielding film, for example, a laminated film having a colored film layer such as yellow between two transparent polyethylene films can be used. The inner film is peeled off after the lining material 20 is cured.

The light irradiation device 30 is configured to be movable, and includes an irradiation unit 31, a surface temperature sensor 34, an atmosphere temperature sensor 36, and an imaging unit 37, as shown in FIGS. 1 and 3. Further, the light irradiation device 30 is connected to the control device 40 mounted on the ground construction vehicle 50 via the cable material 49. In the light curing operation, the light irradiation device 30 moves in the sewer pipe 70 by pulling the cable material 49. In the following description, in the light irradiation device 30, the side on which the cable material 49 that is forward in the moving direction is attached is referred to as the front side, and the side on which the imaging device 37 that is backward in the moving direction is attached is referred to as the rear side.

A plurality of irradiation units 31 are provided so as to form a line in the moving direction of the light irradiation device 30, and in the present embodiment, from the front side, the first irradiation unit 31A, the second irradiation unit 31B, the third irradiation unit 31C, and the third irradiation unit 31C. Five irradiation units, that is, a four irradiation unit 31D and a fifth irradiation unit 31E are provided. Both ends of each irradiation unit 31 are supported by the support 32. The irradiation unit 31 of the present embodiment is a tubular lamp (for example, a metal halide lamp, a mercury lamp, a gallium lamp, or the like that can irradiate a wavelength in the range of ultraviolet rays to visible light). The number of irradiation units 31 is not limited to this and may be one or more. One or more pipe bodies 33 are provided between adjacent support bodies 32, and preferably three pipe bodies 33 are provided so as to be equidistant in the circumferential direction of the irradiation unit 31. Inside the pipe body 33 and the support body 32, a lead wire for supplying electric power to each irradiation unit 31 is inserted. This conducting wire is connected to the power supply unit mounted on the ground construction vehicle 50 through the inside of the cable material 49 attached to the support 32, and each irradiation unit 31 is individually turned on by the control device 40. The extinction can be controlled and the irradiation output can be adjusted individually. Between each irradiation part 31, a traveling means 38 is provided which is movable in the pipeline while preventing the irradiation part 31 from colliding with the inner wall of the tubular lining material 20.

The surface temperature sensor 34 measures the inner surface temperature of the lining material 20, and a plurality of surface temperature sensors 34 are provided at intervals in the moving direction of the light irradiation device 30. In the present embodiment, the surface temperature sensors 34 are arranged at equal intervals. A surface temperature sensor 34 is attached to each of the four supports 32. As the surface temperature sensor 34, for example, a non-contact type IR sensor (infrared temperature sensor) can be used. In the present embodiment, the front surface temperature sensor 34A located at the frontmost part in the moving direction of the light irradiation device 30, the rear surface temperature sensor 34E located at the rearmost part in the moving direction, the front surface temperature sensor 34A and the rear surface temperature. It has one or more intermediate surface temperature sensors 34B, 34C, 34D located between the sensors 34E. By providing a plurality of surface temperature sensors 34 in this way, it is possible to simultaneously detect the surface temperatures of the lining material 20 at a plurality of locations in the pipe axis direction.

The ambient temperature sensor 36 is for measuring the ambient temperature in the lining material 20, and is provided on the support 32 located at the center in the moving direction of the light irradiation device 30. As the ambient temperature sensor 36, for example, a platinum resistance temperature sensor can be used. Note that a plurality of ambient temperature sensors 36 may be provided, and in such a case, they are arranged at intervals in the moving direction, and in particular, they may be arranged on the front side and the rear side of the light irradiation device 30, respectively. preferable. The measurement data of the surface temperature sensor 34 and the ambient temperature sensor 36 are transmitted to the control device 40 via a conductor in the cable material 49.

The image pickup unit 37 is, for example, a television camera capable of picking up an image of the inside of the conduit, and is installed at the rear end of the light irradiation device 30. The imaging data is transmitted to the control device 40 and displayed on the display means 46 (for example, a monitor screen) of the control device 40. The image pickup means 37 may be attached to each of the front end portion and the rear end portion of the light irradiation device 30.

The compressor 12 is mounted on a construction vehicle 50 on the ground and supplies compressed air to the inside of the lining material 20 via a hose 52. The amount of compressed air supplied by the compressor 12 can be adjusted automatically by the controller 40 or manually by the operating means 42. Further, the repair system 10 may include a cooler that cools air together with the compressor 12, and may be configured to be able to supply cooled compressed air.

The styrene concentration detector 14 and the carbon monoxide concentration detector 16 are arranged downstream of the lining material 20 in the compressed air feeding direction and upstream of the deodorizing device 18, and pass through the lining material 20. The styrene concentration and the carbon monoxide concentration in the air are measured.

The deodorizing device 18 is disposed on the ground and performs a process of removing an odor-causing substance contained in the gas that has passed through the lining material 20. Specifically, the air discharged from the lining material 20 is taken into the deodorizing device 18 arranged on the ground via the hose 54, is subjected to odor treatment, and is then discharged to the outside. The deodorization device 18 may have a structure in which a concentration measuring device for measuring the concentration of the odor-causing substance in the gas before flowing into the deodorization processing unit is provided on the upstream side.

The control device 40 includes, for example, an operation means 42 such as an operation panel and a switch button and a display means 46 such as a monitor screen, an information processing means such as a CPU, a storage means 44 such as a RAM and a ROM, an input/output interface and the like. It is configured with a computer. The control device 40 is configured to control the traveling speed of the light irradiation device 30, the irradiation output of the irradiation unit 31, and the supply amount of compressed air by the compressor 12 based on the measurement result of the surface temperature sensor 34. The control of the other connected devices by the control device 40 can be performed by either one or both of automatic control based on the received data and manual control performed by the operator using the operation unit 42.

A predetermined light irradiation allowable temperature T _P , a predetermined first surface temperature T _1, and a predetermined second surface temperature T ₂ for the lining material 20 are set in the storage means 44. The light irradiation allowable temperature T _P is a control temperature value at which the lining material 20 does not deteriorate due to overheating. The first surface temperature T ₁ is lower than the light irradiation allowable temperature T _P , and the second surface temperature T ₂ is lower than the first surface temperature T ₁ , so that the operating states of the light irradiation device 30 and the compressor 12 are controlled. This is the reference temperature value to be changed. The light irradiation allowable temperature T _p , the first surface temperature T _1, and the second surface temperature T ₂ change depending on the material of the lining material 20. As an example, the light irradiation allowable temperature Tp is 150° C., the first surface The temperature T ₁ can be 120° C. and the second surface temperature T ₂ can be 25° C.

Further, in the storage means 44, a predetermined ambient temperature control value for the ambient temperature inside the lining material 20 is set. The ambient temperature control value is a temperature value at which the lining material 20 does not deteriorate due to overheating. Further, in the storage means 44, a styrene concentration control value and a carbon monoxide concentration control value, which are control values for ensuring safety, are set for the styrene concentration and the carbon monoxide concentration, respectively.

The control device 40 further notifies the operator by a visual and/or audible method that the measurement result by each of the temperature sensors 34, 36 and each of the detectors 14, 16 has reached the above-mentioned predetermined control value. The notification means 46 is provided. The notification unit 46 can be, for example, an alarm device that generates an alarm sound when the control value is exceeded. When at least one of the measurement results of the temperature sensors 34 and 36 and the detectors 14 and 16 exceeds a predetermined control value, the notification unit 46 notifies. In addition, the reference of the notification when the surface temperature sensor 34 exceeds the light irradiation allowable temperature T _P which is the control value is one of a plurality of surface temperature sensors 34A, 34B, 34C, 34D, 34E that is arbitrarily determined. It can be set when the surface temperature sensor 34 exceeds the allowable light irradiation temperature T _P. In the present embodiment, when the measured value of the intermediate surface temperature sensor 34D adjacent to the rear surface temperature sensor 34E exceeds the allowable light irradiation temperature T _P , notification is given, and the irradiation unit 31 is turned off to perform light irradiation. The movement of the device 30 is stopped. After that, the surface temperature is continuously measured, and after the measured value falls within a predetermined workable range, the curing work is restarted.

In addition, the storage means 44 of the control device 40 stores the compressed air by the compressor 12 when performing the hardening work based on the thickness of the lining material 20, the material, the inner diameter, the thickness, etc. of the sewer pipe 70 to be repaired. The standard supply amount per unit time, the standard moving speed of the light irradiation device 30, and the standard output value of each irradiation unit 30 (that is, the standard light irradiation amount per unit time) are set. In the curing step described below, the control device 40 controls the compressor 12 and the light irradiation device 30 by using the standard air flow rate, the standard moving speed, and the standard output value as initial values.

Next, a method of repairing the sewer pipe 70 using the repair system 10 will be described.

First, as shown in FIG. 4, the uncured lining material 20 is introduced into the sewer pipe 70 from one manhole 72 by the traction operation of the traction device 60 installed on the ground (lining material introducing step). The towing device 60 includes a towing rope 62, and the towing rope 62 attached to the tip end of the lining material 20 is pulled from the other manhole 73 side so that the lining material 20 is drawn into the sewer pipe 70.

Next, compressed air is supplied to the inside of the introduced lining material 20 by the compressor 12 to expand and expand the diameter of the lining material 20 and bring it into close contact with the inner wall surface of the sewer pipe 70. Both ends of the lining material 20 are closed by end packers 24 and 25 having necessary through holes. Then, the light irradiation device 30 is introduced into the expanded lining material 20.

The light irradiation device 30 is introduced into the sewer pipe 70 from one manhole 72, and is pulled to the other manhole 73 by using a tow rope (not shown), so that the curing work start position of the sewer pipe 70 shown in FIG. Can be moved up to. During this movement, by imaging the inner surface of the lining material 20 by the imaging means 37 and visually recognizing it on the display means 46 of the control device 40, it is possible to determine whether the lining material 20 is abnormal, for example, whether the inner film is damaged or not. Can be investigated. Then, if necessary, hot air is supplied into the lining material 20 to raise the temperature of the lining material 20.

Next, while supplying compressed air to the inside of the lining material 20, the irradiation part 31 is turned on to irradiate the inside of the lining material 20 with light to cure the curable resin composition contained in the lining material 20 (curing). Process). The lining material 20 is hardened while being pressed against the inner wall of the sewer pipe 70 by supplying compressed air. In the air supply operation during the curing operation, relatively low temperature air (for example, an atmosphere having a temperature lower than the temperature inside the lining material 20, more preferably, a cooler is used to cool the heat generated by light curing. Air) is introduced. In the present embodiment, the light irradiation device 30 is moved from one manhole 73 to the other manhole 72 so that the blowing direction of the compressed air indicated by the white arrow and the moving direction of the light irradiation device 30 are opposite directions. While irradiating light. Further, during the curing work, an image of the inner surface of the lining material 20 is picked up by the image pickup means 37 and it is confirmed whether or not there is a hardening defect.

At the curing work start position shown in FIG. 5, a predetermined time is opened in the order of the fifth irradiation unit 31E, the fourth irradiation unit 31D, the third irradiation unit 31C, the second irradiation unit 31B, and the first irradiation unit 31A. The irradiation unit 31 is turned on. After all the irradiation units 31 are turned on and the output value reaches a predetermined standard output value, the light irradiation device 30 is moved at a predetermined standard moving speed. At this time, the amount of compressed air supplied by the compressor 12 is a predetermined standard amount of supply. In the curing step, the operation is performed while confirming that the measured temperature and the measured concentration are within the predetermined control values by the respective sensors 34, 36 and the respective detectors 14, 16.

In the curing process, when all the irradiation units 31 are turned on and the light irradiation device 30 starts moving, the control device 40 determines the moving speed of the light irradiation device 30 and the irradiation based on the measurement result of each surface temperature sensor 34. The irradiation output of the unit 31 and the amount of compressed air supplied by the compressor 12 are controlled. FIG. 1 shows a moving state of the light irradiation device 30 in the curing step. FIG. 6 is a graph showing an example of the temperature distribution measured by each surface temperature sensor 34. In FIG. 6, A is the front surface temperature sensor 34A, B is the first intermediate surface temperature sensor 34B, and C is the first surface temperature sensor 34B. Second intermediate surface temperature sensors 34C and 34D are third intermediate surface temperature sensors 34D and E are rear surface temperature sensors 34E.

The control device 40 determines that the measured temperatures of all the surface temperature sensors 34 are equal to or lower than the light irradiation allowable temperature T _P and that the measured temperature of at least one surface temperature sensor 34 selected in advance is equal to or higher than the first surface temperature T ₁ . In this case, at least one of decreasing the output of the irradiation unit 31 and increasing the supply amount of compressed air is performed. In the present embodiment, when the intermediate surface temperature sensors 34B and 34C have the first surface temperature T ₁ or higher (see the temperature distribution in the high temperature state of FIG. 6), the intermediate surface temperature sensor 34B and/or the intermediate surface temperature sensor 34B. The output of at least one irradiation unit 31 adjacent to the surface temperature sensor 34C is decreased below the standard output value, and the moving speed of the light irradiation device 30 is set lower than the standard moving speed. Instead of this, or at the same time, the supply amount of compressed air may be increased above the standard supply amount. By performing such control, it is possible to secure a light irradiation amount necessary for curing the lining material 20 while suppressing a rapid increase in the surface temperature of the lining material 20. Further, since the light irradiation can be continuously performed while preventing the lining material 20 from overheating, the lining material 20 can be efficiently cured.

The control in the high temperature state is not limited to this. For example, when the output of the irradiation unit 31 is first reduced and then the high temperature state is not resolved, the supply amount of the compressed air may be increased.

Further, the control device 40 determines that the measured temperatures of all the surface temperature sensors 34 are equal to or lower than the preset light irradiation allowable temperature T _P , and the measured temperature of at least one surface temperature sensor 34 selected in advance is the second. When the surface temperature is equal to or lower than T ₂ , at least one of decreasing the moving speed of the light irradiation device 30, increasing the output of at least one irradiation unit 31 and reducing the supply amount of compressed air is performed. I do. In the present embodiment, when at least one intermediate surface temperature sensor 34 among the three intermediate surface temperature sensors 34B, 34C, 34D has a second surface temperature T ₂ or less (the temperature distribution in the low temperature state of FIG. (See), the outputs of all the irradiation units 31 are made larger than the standard output value, and the moving speed of the light irradiation device 30 is made lower than the standard moving speed. By performing such control, the lining material 20 can be sufficiently irradiated with light and the temperature of the lining material 20 can be raised to accelerate the curing.

The control in the low temperature state is not limited to this. For example, when the output of the irradiation unit 31 is increased first, and then the low temperature state is not eliminated, the moving speed of the light irradiation device 30 is reduced and further eliminated. If this is not the case, the supply amount of compressed air may be made lower than the standard supply amount.

The surface temperature sensor 34 that serves as a reference for switching the control can be arbitrarily selected, but it is preferable to include at least one intermediate surface temperature sensor 34. Further, the light irradiation amount, the moving speed, and the degree of increase or decrease in the compressed air supply amount can be set in advance in the control device 40. In the control described above, in the case of the proper state 1 or the proper state 2 shown in FIG. 6, the curing work is continued without changing the settings of the light irradiation device 30 and the compressor 12.

Further, as a more preferable control method, the control device 40 is configured such that the measured temperature of the at least one intermediate surface temperature sensor 34 is higher than the measured temperature of the front surface temperature sensor 34A and is equal to or higher than the measured temperature of the rear surface temperature sensor 34E. (That is, a temperature equal to or higher than the temperature measured by the rear surface temperature sensor 34E), at least the moving speed of the light irradiation device 30, the output of at least one irradiation unit 31, and the supply amount of compressed air. You may make it control one. In such a case, at least one of the light irradiation amount, the moving speed of the light irradiation device 30, and the compressed air supply amount is changed with respect to the lining material 20 in the proper state 2 of FIG. Generally, the temperature of the lining material 20 rises with the lapse of time when curing starts due to the polymerization reaction due to light irradiation, and the temperature starts to drop when the peak temperature is reached and the polymerization reaction ends. Therefore, by performing such control, the photo-curing reaction can be completed when the rear surface temperature sensor 34E passes, and the lining material 20 can be more reliably cured.

As a more preferable control method, as in the temperature distribution in the proper state 1 of FIG. 6, among all the surface temperature sensors 34, the measured temperature of the intermediate surface temperature sensor 34D adjacent to the rear surface temperature sensor 34E is the rear surface temperature sensor 34E. To control at least one of the moving speed of the light irradiation device 30, the output of at least one irradiation unit 31, and the supply amount of compressed air so that the temperature becomes equal to or higher than the measurement temperature of the surface temperature sensor 34E. You can By performing such control, it is possible to make the lining material 20 reach the peak temperature near the rear end portion of the light irradiation device 30, and as a result, while curing the lining material 20 reliably, unnecessary light irradiation is reduced. The curing efficiency can be increased.

Further, when the temperature measured by the atmosphere temperature sensor 36 becomes equal to or higher than the atmosphere temperature control value, the control device 40 stops the traveling of the light irradiation device 30 and turns off the irradiation unit 31. As a result, overheating of the lining material 20 can be prevented. After that, the ambient temperature is continuously measured, and after the measured value falls within a predetermined workable range, the curing work is restarted.

In the curing step, the styrene concentration detector 14 measures the styrene concentration in the air that has passed through the lining material 20, and the work is performed while confirming that the concentration is below the styrene concentration control value. When the styrene concentration is equal to or higher than the control value, regardless of the measurement results of the surface temperature sensor 34 and the ambient temperature sensor 36, the alarm device is activated, the irradiation unit 31 of the light irradiation device 30 is turned off, and the traveling is stopped. The amount of air sent by the compressor 12 is increased. Then, the styrene concentration is continuously measured, and after the measured concentration value falls within a predetermined workable range, the curing work is restarted. In this way, when the concentration of flammable styrene exceeds the control value and there is a concern that the temperature will rise due to a fire or the like, the irradiation unit 31 of the light irradiation device 30 is turned off to prevent the temperature rise and to send the light. Ventilation is performed so that the amount of styrene is decreased by increasing the amount of air, so that a fire can be prevented and the lining material 20 can be prevented from overheating.

Further, in the curing step, the carbon monoxide concentration detector 16 measures the carbon monoxide concentration in the air that has passed through the lining material 20 to confirm that the carbon monoxide concentration is below a predetermined limit value. I do. When the concentration of carbon monoxide is equal to or higher than a predetermined limit value, the alarm device is activated to turn off the irradiation unit 31 of the light irradiation device 30 regardless of the detection results of the surface temperature sensor 34 and the ambient temperature sensor 36, and the vehicle travels. Stop. Then, the carbon monoxide concentration is continuously measured, and after the measured concentration value falls within a predetermined workable range, the curing work is restarted. Thus, for example, when the carbon monoxide concentration exceeds the limit value due to the smoldering combustion of the lining material 20 or the like, the irradiation by the light irradiation device 30 is stopped to prevent the temperature rise and the fire from being generated by the combustion. You can

After the curing work is completed, as shown in FIG. 7, the light irradiation device 30 is removed, the inner film is peeled off, the cured lining material 20 is subjected to the pipe mouth treatment, and the water blocking members 74 and 75 are removed. .. In the pipe mouth treatment step, the lining material 20 is cut off in accordance with the opening shape at the joint between the sewer pipe 70 and the manholes 72, 73. The cutting of the lining material 20 can be performed, for example, by cutting the cured lining material 20 into a circular shape with a cutter of a cutting machine. As a result, the inner wall of the sewer pipe 70 is covered with the lining material 20 that is hardened and formed integrally therewith.

As described above, in the repair system 10 of the present embodiment, by controlling the light irradiation device 30 and the compressor 12 based on the temperature measured by the surface temperature sensor 34, the sewage pipe 70 to be repaired in the curing operation is controlled. In order to prevent the lining material 20 from deteriorating due to a rise in temperature, the lining material 20 can be prevented from deteriorating depending on environmental conditions around the sewage pipe 70, such as the presence or absence of groundwater around the sewage pipe 70, the material of the sewage pipe 70, and the temperature change associated with the reaction heat of photocuring. However, the lining material 20 can be efficiently cured. Further, by recording the measured values of the surface temperature, the atmospheric temperature, the carbon monoxide concentration, and the styrene concentration with time by the control device 40, it is possible to analyze the situation when an abnormality occurs and improve the curing efficiency by light irradiation. It can be useful.

Next, a modified example of the light irradiation device 30 will be described with reference to FIG. In the light irradiation device 30, the irradiation unit 31 includes a cylindrical main body and a plurality of LEDs (light emitting diodes) 35 provided on the outer peripheral surface of the main body. The body portion 37 can be formed in a cylindrical shape or a prism shape, and in the case of the prism shape, the LEDs 35 are preferably arranged at equal intervals on each side wall. Note that the other configuration of the light irradiation device 30 is the same as that of the above-described embodiment, and thus the description thereof is omitted.

Next, a modified example of the repair system 10 of the present invention will be described with reference to FIG. Note that FIG. 9 is an enlarged sectional view of an essential part showing a curing process by the repair system 10.

In the repair system 10 of the modified example, in the step of introducing the lining material 20, the outer surface temperature sensor 39 that measures the temperature of the outer surface of the lining material 20 between the inner wall surface of the sewer pipe 70 and the outer peripheral surface of the lining material 20. Is provided.

The outer surface temperature sensor 39 is in the form of a thin sheet, and can be configured to be attached to the outer surface of the lining material 20 in advance, and a plurality of outer surface temperature sensors 39 are provided at a predetermined interval in the cylinder axis direction of the lining material 20. .. Each outer surface temperature sensor 39 is connected to the control device 40 via a conductor (not shown).

In the curing step, the temperature of the outer surface of the lining material 20 is continuously measured by each outer surface temperature sensor 39. In general, the measurement temperature is high on the outer surface of the lining material 20 where an exothermic reaction due to photocuring occurs. The control device 40 selects the one having the highest measured temperature among the temperature values measured by each outer surface temperature sensor 39, and when the selected measured temperature is equal to or lower than the preset low threshold temperature, the light irradiation is performed. At least one of reducing the moving speed of the device 30, increasing the output of the irradiation unit 31, and reducing the supply amount of compressed air is performed. In this modification, the low threshold temperature is set to a temperature equal to or lower than the above-mentioned second surface temperature T ₂ . Of the plurality of irradiation units 31, the irradiation unit 31 whose output is increased is preferably located on the front side in the moving direction of the light irradiation device 30 with respect to the outer surface temperature sensor 39 having the highest measured temperature.

The outer surface temperature sensor 39 can be left in the sewer pipe 70 without being removed by cutting the conducting wire after the hardening work of the lining material 20.

The outer peripheral surface of the lining material 20 that comes into contact with the inner wall of the sewer pipe 70 is cooled by the influence of the sewer pipe 70 cooled by groundwater. However, as in this modification, the temperature of the outer peripheral surface of the lining material 20 is measured. When the measured temperature is low, the outer peripheral surface temperature of the lining material 20 can be increased by decreasing the moving speed of the light irradiation device 30 or increasing the output of the irradiation unit 31. Thereby, the lining material 20 can be hardened more appropriately.

The present invention is not limited to the above-described embodiments and modified examples, and various modifications can be made without departing from the spirit of the invention.

For example, the surface temperature sensor 34 may be installed in the light irradiation device 30 in place of the plurality of surface temperature sensors 34. When there is one surface temperature sensor 34, when the measured temperature of the surface temperature sensor 34 is equal to or lower than the light irradiation allowable temperature P _{1 and is} equal to or higher than the predetermined first surface temperature T ₁ , the output of the irradiation unit 31. And at least one of the increase in the supply amount of compressed air are performed, and when the temperature measured by the surface temperature sensor 34 is the second surface temperature T ₂ or less, the moving speed of the light irradiation device 30 is decreased. At least one of increasing the output of the irradiation unit 31 and increasing the output of the irradiation unit 31 is performed. Further, in this case, it is preferable that the surface temperature sensor 34 is attached to the center position in the moving direction of the light irradiation device 30 or to the rear of the center position.

10 Repair system 12 Compressor (air supply means)
14 Styrene concentration detector 16 Carbon monoxide concentration detector 18 Deodorizer 20 Lining material 30 Light irradiation device 31 Irradiation part 32 Support 34A Front surface temperature sensor 34B, 34C, 34D Intermediate surface temperature sensor 34E Rear surface temperature sensor 36 Atmosphere temperature sensor 40 Control device 70 Sewer pipe 72,73 Manhole

Claims (7)

By adhering the tubular lining material to the inner wall surface of the existing pipe buried in the ground, while supplying compressed air to the inside of the lining material, by the movable light irradiation device introduced inside the lining material, In a method of repairing an existing pipe including a curing step of curing the lining material by irradiating the inner surface of the lining material with light,
The light irradiation device has an irradiation unit that irradiates light, and a surface temperature sensor that measures the surface temperature of the lining material,
In the curing step,
When the temperature measured by the surface temperature sensor is equal to or lower than a preset allowable light irradiation temperature and the measured temperature is equal to or higher than a predetermined first surface temperature, a decrease in output of the irradiation unit and a supply amount of compressed air The method for repairing an existing pipe is characterized by performing at least one of the above. A plurality of the surface temperature sensors are provided at intervals in the moving direction of the light irradiation device,
In the curing step,
When the measured temperature of all the surface temperature sensors is equal to or lower than a preset light irradiation allowable temperature and the measured temperature of at least one surface temperature sensor selected in advance is equal to or higher than the first surface temperature, the irradiation unit 2. The method for repairing an existing pipe according to claim 1, wherein at least one of the reduction of the output of the device and the increase of the supply amount of the compressed air is performed. In the curing step,
A predetermined second surface in which the measured temperatures of all the surface temperature sensors are equal to or lower than a preset allowable light irradiation temperature and the measured temperature of at least one surface temperature sensor selected in advance is lower than the first surface temperature. The method according to claim 2, wherein at least one of the moving speed of the light irradiation device, the output of the irradiation unit, and the supply amount of compressed air is reduced when the temperature is equal to or lower than the temperature. Repairing existing pipes. The surface temperature sensor is a front surface temperature sensor located at the frontmost part in the moving direction of the light irradiation device, a rear surface temperature sensor located at the rearmost part in the moving direction, the front surface temperature sensor and the rear surface temperature sensor. And one or more intermediate surface temperature sensors located between
In the curing step, the moving speed of the light irradiation device, the output of the irradiation unit, and the supply of compressed air so that the measured temperature of at least one intermediate surface temperature sensor is equal to or higher than the measured temperature of the rear surface temperature sensor. The method for repairing an existing pipe according to claim 2, wherein at least one of the quantities is controlled. Of the plurality of surface temperature sensors, the movement of the light irradiation device is such that the measured temperature of the intermediate surface temperature sensor adjacent to the rear surface temperature sensor is equal to or higher than the measured temperature of the rear surface temperature sensor and is the highest temperature. The method of repairing an existing pipe according to claim 4, wherein at least one of a speed, an output of the irradiation unit, and a supply amount of compressed air is controlled. It is arranged between the existing pipe and the lining material, and includes an outer surface temperature sensor for measuring the temperature of the outer peripheral surface of the lining material,
In the curing step, when the temperature measured by the outer surface temperature sensor is equal to or lower than a predetermined low threshold temperature, the moving speed of the light irradiation device decreases, the output of the irradiation unit increases, and the amount of compressed air supplied. At least 1 is performed among reduction, The repair method of the existing pipe of any one of Claims 1-5 characterized by the above-mentioned. With a tubular lining material that is introduced into the existing pipe buried in the ground,
Air supply means for supplying compressed air to the inside of the lining material,
A movable light irradiation device having a surface temperature sensor for measuring the surface temperature of the lining material and an irradiation unit for irradiating light,
A control device that is connected to the air supply unit and the light irradiation device, and controls the air supply unit and the light irradiation device based on the temperature measured by the surface temperature sensor;
By the light irradiation device introduced into the inside of the lining material, in the repair system of the existing pipe for irradiating light from the inside of the lining material to cure the lining material,
The control device is
When the temperature measured by the surface temperature sensor is equal to or lower than the preset light irradiation allowable temperature and the measured temperature is equal to or higher than the predetermined first surface temperature, the output of the irradiation unit is reduced and the air supply means is used. An existing pipe repair system characterized by performing at least one of increasing the amount of compressed air supplied.

Images