JPH0741670B2 - Method and apparatus for lining aisles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for lining a passage, wholly or partially surrounded by walls, such as an aboveground or underground pipeline. According to the method, a flexible hose-shaped lining laminate is inserted into a passage and then expanded by a gas pressure medium such as compressed air to press and maintain the inside of the passage, whereby the inside of the passage is extended. The shape is molded, and then the curable resin contained in the laminate is cured by radiant energy such as light energy.

Conventionally, a method of lining a passage surrounded by a wall such as a water pipe, a sewer or another type of pipeline is known, and in this method, a flexible hose-shaped laminate containing a curable resin is used. This is introduced into a lined passage in an uncured state, and then the curable resin material contained in the hose is cured to form a stable form.

The introduction of the hose lining laminate into the lined passage is either by pulling the laminate into the passage and passing it through the passage, or by inverting the laminate into the passage and passing through the passage. We carry out by that method. When the laminated body is drawn into the passage, first, the laminated body is drawn into the passage and closed at both ends of the passage, and then the laminated body is expanded by the pressure medium in the form of either water or air and brought into contact with the inside of the passage. The laminate is applied to the inner surface shape of the passage, and then the laminate is kept in an expanded state until the curable resin in the laminate is cured. The method of inverting the laminate has been increasing in recent years.To do this, first fix the front end of the hose-shaped laminate to the reversing device facing the passage opening / outside the end. After that, the remaining part of the laminated body is inverted into the passage by the inversion medium and passed into the passage. Such reversal medium is usually a pressurized liquid, preferably water. Further, the reversal medium, during the entire reversing step, that is, as the laminate is inverted into the passage, before the curable resin in the laminate is cured to form a stable laminate, The media acts with sufficient pressure to push the inverted stack into contact with the inside of the passage, thereby conforming the stack to the inside shape.

After the lining laminated body is placed at a predetermined position inside the passage to be lined, the curable resin in the laminated body is cured and promoted.For this reason, according to the most reliable lining method to date, the hose type Heat is supplied by the same medium used for expansion and inversion of the stack. Therefore, such a medium must be heated to the temperature required to initiate the curing of the curable resin. The heated pressure medium, whether water or air, is usually provided between the stack and the heating device in order to compensate for heat loss due to a relatively cold environment and at the same time supply the amount of heat required for curing. It must be circulated to provide the additional heat required during each cycle. At the same time, the heating medium pressurizes the laminated body so that it can be pressed and maintained inside the road to be lined, and the shape along the inside of the passage of the laminated body can be maintained until the shape of the entire laminated body is stabilized by resin curing. I have to do it.

However, it is relatively cumbersome to circulate in the lining laminate introduced into the passages using heated pressurized water or air as the circulation medium, only at the expense of all the equipment for heating and circulating the curing medium. In addition, the cost required to heat the curing medium used to the temperature required for the curing operation is also very high.

Instead of heat curing, i.e., curing by supplying heat with a medium such as water or air, after introducing the hose-shaped laminate into the passage to be lined, the optical radiation source is drawn into the laminate and used. There is a method of performing photo-curing. When curing is performed using radiant energy, such as light energy, the hose-shaped laminate should be conformed to the inner shape of the passageway to be lined prior to initiation of curing so that the radiation source can be drawn into the laminate. In addition, the inside of the passage must be kept inflated or blown up. Regarding the expansion or blowing of the lining laminate,
Pressurized water or compressed air is used even when curing is performed or initiated by light radiant energy in the wavelength range of 300 to 500 nm type.
If water is used, the radiant source must be manufactured so that it can function in water while its wire and cable passages and the connecting components used there are absolutely watertight.
This seems almost impossible in terms of acceptable costs. Furthermore, such a radiation source has to be introduced into a water-filled stack and then moved while always maintaining the radiation source in the central position of the stack, which appears to be a major problem. Due to these problems, in the case of curing the lining laminate by radiant energy such as light energy, compressed air is used as each medium for inversion and expansion, instead of water, and its adoption is increasing.

However, the use of water as a pressure medium occurs even when water is stagnant, especially when air is used as a pressure medium, especially when the laminate is a relatively thick layer and consists of one or more reinforcing layers. Risk, that is, there is no risk of overheating that can cause the laminate to burn during the curing process. In order to cure the resin layer as a whole, the advancing speed of the known curing device had to be reduced.

U.S. Pat. No. 4680066 discloses a known method of curing hose-shaped material in a walled passage with multiple radiation sources. According to this method, water is used as the pressure medium for inverting the hose-shaped material in the passage. Thus, after reversal, there is no risk that the material will burn due to overheating during the curing carried out by the radiant energy of the radiation source. However, a disadvantage of using water as the pressure medium is that it does not ensure a good complete cure of the material, which is obtained with a predetermined and determined cure time and cure rate.

On the other hand, according to the invention, the inversion of the stack is carried out by means of a gaseous pressure medium such as compressed air, which means that there is a risk of stack overheating during curing by radiant energy, which can lead to fire. It means.

Thus, an object of the present invention is to use a gas pressure medium such as compressed air for inversion of a hose-shaped laminate / inversion and for pressing to the inside of the passage even if the curing of the laminate is carried out by radiant energy. Eliminating the risk of fire that may occur in between. Another object of the present invention is to make it possible to ensure a good complete cure of the laminate obtained with a given cure time / cure rate.

Thus, the object of the present invention can be achieved by a method of the type described above characterized by a combination of the following technical matters: Providing the resin with radiant energy required for curing the resin for a predetermined period of time. Forming a radiant energy by moving a plurality of radiant energy sources connected in sequence at a substantially constant speed in a laminate expanded by a gas medium such as compressed air, and compressed air, etc. Effluent of the gaseous medium through the hose-shaped laminate, thereby carrying away any heat that may be generated during the curing process of the resin under continuous pressing of the laminate into the passageway interior.

The present invention will now be described in more detail with reference to the accompanying drawings. FIG. 1 shows an underground pipeline, a hose-shaped lining laminate introduced into the pipeline and expanded,
It is a schematic diagram showing a longitudinal cross section of a required lining device. FIG. 2 is a schematic view showing a connected state of the curing device when the curing device is introduced into the laminated body pressed inside the pipeline, and FIG. 3 is an enlarged longitudinal view showing a part of the curing device of FIG. FIG. 4 is a longitudinal sectional view of the light source wagon, FIG. 5 is a longitudinal sectional view of the ignition wagon, and FIGS. 6 and 7 are plan views showing a light source holding ring provided in the light source wagon.

In FIG. 1, a pipeline, generally designated by reference numeral 1, is to be placed and lined in the ground,
In the figure, it is shown as extending between the two walls 2,3. The step feeders 4 are arranged in a pit designated by 2 and each comprise an alternating membrane 5 in the closure device 6,7. The closing devices 6 and 7 are arranged at a predetermined distance from each other, and the hose type lining laminate 8 is provided.
To gradually feed forward. It should be noted that such a laminated body 8 is shown in FIG.
It is shown already installed therein. The step feeder 4 is arranged substantially vertically in the pit and is connected to the pipeline 1 by a connection feeling 9. Connection pipe 9
At the inlet end 11 of the pipeline 1 comprises a 90 degree angled bend 10 forming the end thereof. The hose-shaped lining laminate 8 is connected to the outside of the end of the pipe bent portion 10 facing the inlet end 11 side after the introduction of the laminate 8 into the pipeline 1.

As mentioned above, the lining laminate 8 is introduced into the pipeline 1 to be repaired by the inner lining, and such introduction is either conducted into the pipeline 1 or reversed by a conventional method. Method. In the embodiment of FIGS. 1 and 2, shown only as an example, the hose-shaped laminate 8 is shown inverted into the pipeline 1, the final end 12 of which is provided by a constant flow valve 13. close. The valve 13 is of a spool type and is provided with a rope passage 14 arranged in the center thereof and several air outlet holes 15 penetrating the valve 13. These outlet holes 15 can be opened and closed by a plug 16 as required, so that the air flow rate can be increased or decreased in the lining laminated body 8 applied inside the pipeline 1. The flow rate control valve 13 is applied to a predetermined position of the end portion 12 during the inversion process of the laminated body 8 and immediately before the completion of insertion of the final end portion 12 into the step feeder 4. If desired, it may be applied to a predetermined location in advance at the time of manufacturing the laminated body in the factory or at another suitable time from the manufacturing time to the reversing time.

The pressure medium required for the inversion, preferably compressed air, is fed to the step feeder 4 via a compressed air line 17 from a medium source of pressurized air, for example a compressor (not shown), outfeeding the feeder 4. section)
It flows into the inside of 18 and the inside of the discharge | emission section and a connection pipe and the inside of the said discharge section and the connection pipe | tube which is inversion which extends in the said feeder 4, and is inversion. After the completion of the inversion, the same compressed air is used as a pressure medium, and the hose-shaped lining laminated body 8 introduced into the pipeline 1 is pressed against the inside of the pipeline 1 to cure the curable resin contained in the laminated body. The whole laminated body 8 is maintained until it becomes a stable form.

The flow control valve 13 is then applied to the final end 12 of the stack and the rope 19 is connected to the flow control valve 13. This rope 19 is used as a braking rope during at least the latter half of the reversing process, and the reversing speed is adjusted by the applicable method accessible from outside the valve 13 until the reversing of the entire lining laminate 8 is completed (see FIG. 1). . In this state (see FIG. 1), the rope 19 passes through the inside of the inversion stack 8 and then up through the connecting pipe 9 and the feeder 4 to be a rope winch 20 that can be operated mechanically or manually.
While the membrane 5 of the two closure devices 6 and / or 7 is pushed through a line 19a from a compressed air line (not shown), thereby enclosing and closing the entire circumference of the rope 19. is doing. That is, in this state, the pressure applied to the inside of the laminated body 8 introduced into the pipeline 1 and the internal pressure from the connecting pipe 9 to the closing devices 6 and 7 that close the membrane 5 are the same.

At this stage, the remaining lining process is mainly only the curing process of the laminate 8 introduced into the pipeline 1. In order to carry out this process, radiant energy such as light energy is used according to the present invention. The curable resin contained in the laminate 8 is prepared by a method suitable for the type of radiant energy used. When using light energy for curing, preferably in the wavelength range 300 to 500 nm,
More preferably, light having a wavelength range of 350 to 450 nm is selected.

The radiant energy required to cure the resin is supplied by a curing device, generally designated 20. The curing device connects several wagons to each other in an articulated manner to form a "train", which consists of a light source wagon 21 and an ignition wagon 22. Each light source wagon 21 comprises a radiation source 23 for emitting curing radiation, while each ignition wagon 22 comprises an ignition and control set (ignition / control set) for two light source wagons 21.
Equipped with 24. In the embodiment shown, the curing device comprises six light source wagons 21, and thus only three ignition wagons 22. However, the numbers of light source wagons and ignition wagons are not limited to the above-mentioned numerical values described only as specific examples, and the radiant energy supplied to achieve the entire curing step by curing the resin contained in the laminate is required. It can be increased or decreased depending on the total amount.

Each wagon is an independent type, but each wagon 21,22
(FIGS. 4 and 5) are provided with substantially identical ends 25, each of which comprises a sleeve-shaped dowel 26 with a support flange 27 at the inner end of the pin.
Is provided. Grip ring placed on the mating pin 26
28 grips six spring legs 29, one end 30 of which is inserted into a hole 31 of the ring 28 and fixed with fixing screws 32. Each such spring leg 29 also comprises a wheel, preferably a set of divisible wheels 23, with the other bent end 34 surrounding the wheel shaft 35 in a twistable manner. In addition, each spring leg 29
Since the spring portion 36 is rotated several times and extends spirally between the positions 30 and 34, the length of each leg is determined according to the rotation speed of the spring portion 36.

The grip ring 28 for the spring leg 29 is held in place by the threaded fixed socket 37 on the sleeve-shaped dowel pin 26 and is in contact with the support flange 27. The fixed socket 37 has its threads acting in cooperation with the corresponding threaded portions 38 on the mating pins 26, and is also provided with a threaded hole 39 for one or several stop screws.
It is possible to prevent accidental rotation of 37.

By using this elastic transporting device composed of the wagon wheel 33, while the optical train connecting the wagons 21 and 22 is pulled in the pipeline 1 to cure the laminate, the wagons 21 and 22 are connected. It is possible to achieve the essential advantage of being able to keep the machine in the central position of the pipeline 1 cross section at all times.
It can be increased by making the number of 3 relatively large. However, the number of wheels can be set to 6 or less without departing from the principle of the present invention. Furthermore, the connection between the wheel 33 and its spring leg 29 makes it possible to adapt the various dimensions of the pipeline 1 to which the wagons 21, 22 are lined by quickly replacing the spring leg with a long one or a short one. So, it is done.

In the small area portion of the sleeve-shaped end alignment pin 26,
A ring 40 is provided coaxially on the outer side of each fixed socket 37. The ring 40 is supported on the dowel pin 26 by means of a fixed ring 41 and comprises two diametrically positioned and extending transport arms 42 in the same direction. The transfer arm 42 is
The wagons 21, 22 can be pivoted at a 90 degree angle with respect to the corresponding transport arm 42 at the other end of the wagon so that they can be connected to each other by a cardan universal joint. The connections between the two trolleys 21, 22 are made by means of a sleeve-shaped intermediate piece 43, in addition to the transfer arm 42 at the mutually rotatable ends of the two trolleys. The intermediate part 43 is jointly connected to the transport arm 42 of one wagon by the axle pins 44 arranged on the diameter, and the transport arm 42 of the other wagon is similarly connected by the axle pins 45 arranged on the diameter. Connect to the joint like. The transfer arm 42 of the latter wagon is the transfer arm 42 of the former wagon.
Is pivotable at a 90 degree angle with respect to each other, so that the axle pins 44, 45 form two connecting shafts which are capable of pivoting movement in two mutually perpendicular directions. The cardan universal joint between the wagons also has an opening through which the cable bundle 60 necessary for power distribution and connection control between different wagons can be drawn into the inside through the joints without obstacles.

Furthermore, each wagon 21, 22 has two conical end shields 46, the small area of which is connected to the support flange 27 of the end fitting pin 26, while the large area of which is gripped by screws 47. Connect to ring 48. The grip ring 48 has a light source 23 for the light source wagon 21 and an ignition / control set 24 for the ignition wagon 22 in an annulus 50 secured to the grip ring 48 by screws 47. The annular body 50 is ignited /
A space 51 having a diameter larger than the height of the control set 24 and allowing the cable bundle 60 to extend within each ignition wagon 22 must be provided. Each ignition / control set 24 is also fixed to the ring 50 of the wagon and at one end of it is provided with connecting means 52 for connecting the set to each radiation source 23 of the light source wagon.

Each light source wagon 21 has a radiation source 23 which is illustrated in UV-lamp form and which is carried by two gripping rings 48.
Specifically, the opening 54 of the wagon grip ring 48 on one side is
Is provided with a non-rotatably arranged socket 53 (see also FIGS. 6 and 7) and is fixed by several fixing screws 55 against the displacement of the ring 48 in the longitudinal direction. Regarding the lamp portion of the radiation source, the radiation source 23 of each wagon is introduced through the corresponding opening 56 and brought into contact with the end of the leaf spring 57 fixed to the rear side of the ring 48. The leaf spring, upon application of the radiation source thereto, can be stretched to exert a reaction force on the radiation source, thereby retaining it in the center of the opening 56. Furthermore, between the grip ring 48 of each light source wagon,
Several tubes, for example three tubes 58, spirally extend. With respect to each tube 58, its end is fixed to each slot 59 on the circumference of the grip ring 48, and the cable bundle is inserted through the inside thereof.
Pull in 60 and wire it to the entire light source wagon 21. tube
Because 58 is helically extended, each point through which the light source train passes has substantially the same amount of radiation while the light source train is retracted and advanced in the applied stack 8 by expansion. Can be radiated.

The train type curing device 20 is housed in the tube 61 before use (see FIG. 2). This tube 61 is connected to the upper part of the step feeder after removing the lid of the tube and connecting the rope 19 to the ends of the wagons 21 and 22 of the curing train, if necessary when applying the apparatus. The cable 60 wound on the cable winch is then passed through the wall inlet in the lid 62 at the end of the tube 61 and the curing train 20.
The tube 61 is pre-pressurized by connecting each of the closing membranes 5 and releasing the closing membrane 5 and introducing compressed air through the compressed air line 17 until a predetermined pressure is reached. The predetermined pressure can be read by a manometer connected to a connecting part 65 of an operation plate (not shown in detail). Light train,
When being introduced into the laminate 8 which is introduced into the pipeline 1 and cured, the rope 19 is used as a tow rope by the mechanical or manual rope winch 63 arranged on the shaft 3, while the cable 60 is used by the cable winch 20. Used as a braking cable or a reverse holding cable. The curing train 20 is pulled through the entire stack 8 to the flow control valve 13 at the final end of the stack in principle, and this final end of the stack is a cord reinforced flexible plastic hose (in the final stage of the reversing process). cord-reinforced flexible-p
It bends upwards in the pit 3 by the last hose 64 (see Fig. 1). In Stand 3, the length of the laminate corresponds to the total length of the light train consisting of the number of ignition and light source wagons 21 and 22 described above of about 2.9 m, which can be shortened substantially. It can be, for example, only 1 m. In this connection, the illustrated light source wagon 21 has a wheel spacing of about 0.23 m and the ignition wagon 22 has a wheel spacing of about 0.23 m.
4 m, the distance between adjacent wheels 33 between two wagons is about 0.12 m. According to the design of the curing train of the present invention, even a relatively narrow bend can be handled while holding the wagons 21 and 22 in the substantially center position at the bend.

The connected curing train 20 has the following features:
The curing can be started by moving the laminate in a direction opposite to the introduction direction of the laminate at a predetermined speed.
That is, the cable 60 is used to pull the energy source 23, while the rope 19 is used to hold and hold the energy source 23 in the direction opposite to the pulling direction.
In such a case, all of the light source wagons 21 of the curing train are not located in the stack 8 portion inside the stand 3, and the radiation source 1 is moved before moving the train 20 into the expanded stack 8. ~ I have to work for a few minutes. During the curing process, the direction of movement of the curing train is preferably opposite to the direction of introduction of the laminate. Because the backward holding rope 19 is much lighter and thinner than the conductive cable 60, the backward holding rope 19 can be held in a tension state.
This is because the reverse direction holding rope 19 is released from the laminated body that is heated to a temperature relatively and substantially higher than the temperature that is possible when 19 is used for towing. That is, in the latter case, the relatively thicker cable 60 is towed along the laminate 8 that is substantially heated by the curing train 20 passing immediately before the cable 60, so that the cable 60 has its laminate. There is a very serious risk of injury to the body in various ways and at least the cable
There is a great risk that a longitudinal recessed "rudder" etc. will be formed after the passage of the. However, this type of damage can be avoided according to the invention by using the direction of travel shown in FIG.

Flow control valve 13 before connecting the curing train radiation source
A large number of holes 15 are opened and a certain amount of air is introduced into the laminate 8 for the removal of heat during the curing process, thus preventing overheating. That is, the number of holes in the valve 13 determines the air flow rate through the stack and thus the cooling effect.

The present invention is not limited to the disclosure of the above specification and the disclosure of the accompanying drawings, and can be modified by various methods within the scope of the concept of the present invention described in the claims below. Can be improved.

Claims (7)

[Claims] 1. A passage completely or partially surrounded by a wall,
For example, when lining a pipeline on the ground or underground, a hose-shaped flexible lining laminate is introduced into the passage and then pressed and maintained inside the passage by a gas pressure medium such as compressed air to maintain the inside of the passage. Forming a conforming form, then curing the resin contained in the laminate with radiant energy such as light energy, supplying a sufficient amount of radiant energy necessary for curing the resin to the resin, and sequentially connecting Laminated body (8) obtained by expanding a plurality of radiant energy sources (23) that have been caused to expand by a gas pressure medium such as compressed air.
By causing the radiant energy to form by moving at a constant speed inside, a gas pressure medium such as compressed air is made to flow out through the hose-shaped laminate (8), whereby the laminate ( The method characterized in that the heat that can be generated during the curing process of the resin is carried out under the continuous pressing of the inside of the passage of 8). 2. A method according to claim 1, wherein the radiant energy source (23) is moved during the curing process of the resin in a direction opposite to the direction of introduction into the passage of the laminate. 3. A conductive cable (60) for a radiant energy source (23) is connected to the radiant energy source (23) and the energy source (23) is expanded by pulling the conductive cable (60). A method as claimed in claim 1 or 2, wherein the stack (8) is advanced along a central path. 4. A passage completely or partially surrounded by a wall,
For example, when lining a pipeline or a trench above ground or underground, a hose-shaped flexible lining laminate is introduced into the passage and then pressed and maintained inside the passage by a gas pressure medium such as compressed air, and the passage concerned. A device for lining the passage by molding a form along the inner side and then curing the resin contained in the laminate with radiant energy such as light energy, the device comprising a plurality of radiant energy generating radiations. Energy sources (23)
Are connected to each other, and the radiation source (23) is connected by a cardan universal joint so that a gas pressure medium such as compressed air can flow out through the hose-shaped laminate (8). A device that is equipped with a device to carry out heat. 5. A device according to claim 4, wherein the cardan universal joint has an opening, through which a conductive cable (60) for the radiant energy source (23) passes. 6. Device according to claim 4, wherein the device for the flow of pressure medium comprises valve means (13) for varying the flow rate of the pressure medium. 7. A valve means (13) is a valve for controlling a flow rate and has a spool shape, and a passage for a rope is provided at a central position of the valve means (13),
Multiple media discharge holes (15) that can be opened and closed by the plug (16)
7. The valve means (13) is provided so as to penetrate therethrough.
The described device.