JP3377704B2 - Pipe lining construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lining a pipe, and more particularly to a method for forming a resin coating layer on the inner surface of the pipe.

[0002]

2. Description of the Related Art Pipes such as gas pipes and water pipes buried in the ground may be corroded and deteriorated by laying for a long period of time or damaged by external force. Therefore, it has been proposed to apply a lining as one of the measures for preventing such an adverse effect. As one of the construction methods to apply the lining, apply an adhesive to the inner surface of the tubular lining material, insert the lining material into the pipeline while turning it over with fluid pressure, and apply it to the inside-out surface. There is a method of adhering the lining material to the inner surface of the pipe with an adhesive (for example, Japanese Patent Publication No. 60-12220
Issue). Also, as a different method, apply adhesive to the surface of the lining tube folded up and down,
After pulling and inserting the lining tube in the pipe, there is a method of expanding the diameter of the lining tube and adhering the surface thereof to the inner surface of the pipe (for example, JP-A-55-17567).

[0003]

However, the above method has the following problems. In each of the construction methods disclosed in the above-mentioned publications, an adhesive is applied to the lining tube forming the lining material, and the lining tube is adhered to the inner surface of the conduit through the adhesive. Therefore, a material for adhesion is required in addition to the lining material. In addition, the amount of the adhesive is set in advance before the lining tube is inserted into the pipe, so that it may not be possible to obtain the necessary adhesive strength when dried while moving in the pipe. Yes,
There is a possibility that the lining material cannot be firmly attached to the inner surface of the pipe. Further, in the case of the work, in the case of the former construction method, a pressure for causing the forward movement of the lining tube and the turning operation to be performed at the same time is required, so that a facility for pressure supply becomes large. In the case of the latter construction method,
Unlike the former case, the method of inserting the lining material into the duct does not require peeling the surfaces that have been joined together,
When pulling and moving the lining material, a special member such as a cover member is required to reduce the frictional resistance between the lining material and the inner surface of the conduit. Moreover, since a negative pressure or an insertion lump is used to expand the diameter of the lining tube after insertion, there is a problem that the adhesive may fly due to the negative pressure or the insertion lump of the insertion lump may be required. .

On the other hand, the lining material to be installed in the pipe line is required to satisfy the following requirements. First
The shape retention is high, and the second is earthquake resistance.
The first shape-retaining property means that it is not deformed by the pressure of the fluid flowing in the pipeline, and is a condition required because it is desired that the area in the pipeline does not change due to the deformation. Second
As for the earthquake resistance of, a large external force is applied to the pipeline due to an earthquake, etc.
This means that the lining material itself does not break even if the pipe path is damaged, and it is a condition required to maintain the function as a pipe. In order to satisfy such conditions, it is common to use a tubular lining material, as disclosed in the above publication, but the problems when using the lining material are as described above. ,
It is desirable to have a construction method that can be lined without causing such problems.

An object of the present invention is to provide a pipe lining construction method using a resin lining which can satisfy the conditions required as a lining material without preparing the above-mentioned member as the lining material and can be easily constructed. To do.

In order to achieve this object, the invention according to claim 1 expands a resin for lining used in a pipe,
The first step of enclosing in a shrinkable porous mesh tube and drawing the mesh tube into the tube, and the mesh tube drawn into the tube in the first step,
The second step of expanding the mesh hole of the mesh tube by expanding the mesh tube in the radial direction with an expansion hose previously inserted in the mesh tube and allowing the encapsulated resin to flow out of the mesh tube. It is characterized by including a third step of taking out the expansion hose and the mesh tube after the resin flowing out of the mesh tube in the step 2 is cured.

According to a second aspect of the present invention, the lining resin used in the pipe is enclosed in a porous mesh tube capable of expanding and contracting, and the mesh tube is drawn into the pipe. The mesh tube drawn in the tube in step 1 is expanded in the radial direction by the expansion hose previously inserted in the mesh tube to expand the mesh hole of the mesh tube, and the resin enclosed is mesh tube. And a third step of taking out only the expansion hose after the resin flowing out of the mesh tube in the second step is cured.

According to a third aspect of the present invention, the lining resin used in the tube is enclosed in a porous mesh tube capable of expanding and contracting, and the mesh tube is drawn into the tube. The mesh tube drawn in the tube in step 1 is expanded in the radial direction by the expansion hose previously inserted in the mesh tube to expand the mesh hole of the mesh tube, and the resin enclosed is mesh tube. And a third step of taking out the expansion hose and the mesh tube after the resin flowing out of the mesh tube in the second step is cured. It is characterized in that a plurality of lining layers are formed in the tube by repeating the third step.

According to a fourth aspect of the invention, in the pipe lining construction method according to one of the first to third aspects,
The mesh tube is characterized in that the mesh hole is expanded only when it is expanded in the radial direction by the expansion hose.

According to a fifth aspect of the present invention, in the pipe lining construction method according to one of the first to fourth aspects,
In the second step, the expansion hose is characterized in that the mesh tube is radially expanded by the fluid pressure flowing therein.

According to a sixth aspect of the invention, in the pipe lining construction method according to the fifth aspect, the fluid pressure is a high temperature pressure.
Obtained by the influx of force, which results in
It is characterized in that the curing reaction of the resin for curing is accelerated .

According to a seventh aspect of the invention, in the pipe lining construction method according to the fifth or sixth aspect, the fluid pressure is
The feature is that the pressure can be adjusted .

[0013]

According to the first aspect of the present invention, the mesh tube drawn into the pipe is expanded in the radial direction by the expansion hose, so that the mesh hole of the mesh tube is expanded and the resin enclosed in the mesh tube is covered with the resin. Then, after the resin is hardened and the resin is cured, the mesh tube and the expansion hose are taken out, so that the inner surface of the tube is lined with the resin.

According to the second aspect of the present invention, the mesh tube drawn into the pipe is expanded in the radial direction by the expansion hose so that the mesh hole of the mesh tube is expanded and the resin enclosed in the mesh tube is filled with the resin. After the resin is hardened and the resin is cured, only the expansion hose is taken out, so that the inner surface of the pipe is lined with a combination of the resin and the mesh tube.

According to the third aspect of the invention, the mesh tube drawn into the tube is expanded in the radial direction by the expansion hose, whereby the mesh hole of the mesh tube is expanded and the resin enclosed in the mesh tube is filled with the resin. A plurality of lining layers can be formed by repeating the steps of applying the resin to the substrate, curing the resin, and then taking out the mesh tube and the expansion hose.

According to the fourth aspect of the present invention, the mesh hole is expanded only when the mesh tube is expanded in the radial direction, so that the encapsulated resin is prevented from flowing out when the mesh tube is not expanded such as when it is drawn into the tube. it can.

According to the fifth aspect of the invention, the resin can be discharged from the mesh tube only when the fluid pressure flowing into the expansion hose acts, so that the resin is wastefully discharged at a position other than the lining construction position. Absent.

According to the sixth and seventh aspects of the invention, since the hardening reaction of the resin can be accelerated by the fluid pressure of the high temperature pressure water flowing into the expansion hose, the function different from the expansion action of the expansion hose can be exhibited. Moreover, if the fluid pressure can be adjusted, the amount of resin flowing out of the mesh tube can be controlled.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the first to fourth embodiments will be described with reference to the illustrated embodiments.
The described invention will be described. FIG. 1 is a schematic diagram for explaining an outline of an apparatus used in an embodiment of an in-pipe lining construction method according to the invention described in claims 1, 4 to 7. Figure 1
In, the in-pipe lining device 1 is configured to include a mesh tube roller 2, a resin liquid tank 3, and a feeding roller 4. The mesh tube roller 2 is a member installed in the vicinity of the vertical hole 6 that is excavated for the pipe line 5 to which the in-pipe lining is applied, and the mesh tube 7 to be described later is wound and the mesh tube 7 is attached. It can rotate in the direction in which it can be extended.

The structure of the mesh tube 7 is shown in FIG. In FIG. 2, the mesh tube 7 is
It is a porous tube in which fibers are woven and can be expanded and contracted. In the contracted state, mesh holes corresponding to meshes are closed, and when expanded in the radial direction, the mesh holes are expanded. A radially expandable expansion hose 8 is inserted inside the mesh tube 7, and a lining resin 9 is provided between the outer peripheral surface of the expansion hose 8 and the inner peripheral surface of the mesh tube 7. Enclosed. The expansion hose 8 expands when pressure is applied to the inside thereof, and otherwise maintains a contracted state due to its own behavior. The mesh tube 7 and the expansion hose 8 located therein are laminated in a flat state when wound around the mesh tube roller 2 so that the length when wound is not increased.

As the lining resin 9, a resin containing a main agent and a curing agent as components is adopted.
Is contracted and the mesh hole is closed, so that it is enclosed between the inner peripheral surface of the mesh tube 7 and the outer surface of the expansion hose 8 described above. The means for enclosing the lining resin 9 will be described later.

A resin liquid tank 3 is provided as a means for enclosing the lining resin 9 between both the mesh tube 7 and the expansion hose 8. As shown in FIG. 3, the resin liquid tank 3 is a tank capable of containing the resin 9, and includes therein an encapsulating portion 10 for the resin 9, conveying rollers 11, 11 ′ and a feeding roller 12, respectively. . One of the transport rollers (the member indicated by reference numeral 11 in FIG. 3) and the payout roller 12 are disposed on the upstream side and the downstream side of the mesh tube 7 in the payout direction, with the enclosing portion 10 interposed therebetween. It is used for guiding and sandwiching the mesh tube 7. Of these rollers
The delivery roller 12 used for sandwiching and transporting has a friction coefficient on its surface so that the mesh tube 7 can be transported while being delivered. Further, as a treatment of the surface of the feeding roller 12, in order to promote the feeding action utilizing the above-mentioned friction coefficient, knurls or irregularities are formed to increase the clamping pressure per unit area and prevent sliding on the surface of the mesh tube 7. It is sometimes done. Further, the pay-out roller 12 is supported so that the axial center position indicated by the symbol P in FIG. 3 can be moved along the pay-out direction of the mesh tube 7 and the distance between the mesh tube 7 and the facing direction can be adjusted. ing.

FIG. 3 is a schematic diagram for explaining the structure of the enclosing section 10 described above. The enclosing section 10 includes an enlarging member 13. The expansion member 13 is a conical member having a tapered portion 13A that is a hollow portion that expands in diameter from the upstream side to the downstream side in the feeding direction of the mesh tube 7 indicated by the arrow, and has a minimum diameter of the tapered portion 13A. The inner diameter of the portion is set to a value that allows the expansion hose 8 to pass therethrough, and the outer diameter of the maximum expanded diameter portion is set to a diameter that allows the mesh holes of the mesh tube 7 to be expanded.

In the resin liquid tank 3, the resin 9 is sealed inside the mesh tube 7 by the following procedure. The mesh tube 7 carried in by the carrying roller 11 is the enclosing part 1
When the mesh tube 7 is transferred to 0, the mesh tube 7 is expanded.
As it passes through the tapered portion 13A, the mesh hole is expanded in the radial direction to enlarge the mesh hole. The resin 9 can be introduced into the mesh tube 7 having the expanded mesh holes through the mesh holes. In this case, the expansion hose 8
Is inserted into the central portion of the expansion member 13 and is integrated with the tip of the mesh tube 7 so as to prevent the resin from flowing out from the tip. The mesh tube 7 into which the resin 9 has flowed in is fed out by the feeding roller 12
The mesh hole is closed by reducing the diameter at the position, and the resin 9 is sealed between the mesh hole and the outer peripheral surface of the expansion hose 8 located inside. If the resin does not easily flow in through the mesh holes when the mesh tube 7 is spread due to the influence of the viscosity of the resin, a pressure means (not shown) is arranged in the resin liquid tank 3 to press the resin. It is also possible to forcefully flow through the mesh holes of the mesh tube 7.

The axial center position of the feeding roller 12 (in FIG. 3,
The position indicated by the symbol P) controls the amount of resin flowing into the mesh tube 7, and the facing distance between the feeding rollers 12 is the resin filling amount in the mesh tube 7, that is,
By controlling the gap between the outer surface of the expansion hose 8 and the inner peripheral surface of the mesh tube 7, the amount of resin filled in the gap can be regulated. For example, as the axial center position of the pay-out roller 12 is moved to the expansion member 13 side, the length of the mesh tube 7 that changes from the expanded diameter to the contracted diameter is shortened. The amount of resin flowing into the interior of the is reduced. In addition, the gap between the outer peripheral surface of the expansion hose 8 and the outer peripheral surface of the mesh tube 7 is narrowed in accordance with the narrowing of the facing distance between the feeding rollers 12. The control of the amount of resin sealed in the mesh tube 7 is performed in relation to the lining film thickness on the inner surface of the conduit. In order to put together the ends of the mesh tube 7 and the expansion hose 8, both of them are passed through the resin liquid tank 3 before the resin is stored in the resin liquid tank 3, and the other one of the conveyance rollers is used. It is desirable to set a procedure in which the resin is sandwiched between (member shown in FIG. 3 and indicated by reference numeral 11 ′) and collected, and then the resin is stored in an amount capable of immersing the mesh tube 7 in the resin liquid tank 3.

The delivery roller 12 and the transport roller 11 'arranged at the position where the mesh tube 7 is delivered from the resin liquid tank 3 are both rollers which can frictionally sandwich the mesh tube 7 together with the delivery roller 12. However, the rotation speed that determines the payout amount of each of the rollers 11 ′ and 12 used for paying out the mesh tube 7 is equal to or slightly faster than the speed at which the mesh tube 7 is conveyed through the pipeline through the wire. There is. Such a speed relationship is for suppressing the generation of movement resistance of the mesh tube 7 when passing through the inside of the conduit 5.

The construction shown in FIG. 4 is used as a structure for inserting the mesh tube 7 into the inside of the pipe line 5 when the pipe lining is constructed using the pipe lining device 1 as described above. In FIG. 4, a parachute 14 is attached to the tip end portions of the mesh tube 7 and the expansion hose 8 which are passed through the encapsulating portion 10 of the resin liquid layer 3 and then collected and integrated. Parachute 14
Is used as a wire-passing member for inserting the mesh tube 7 into the duct 5, and can be moved in the duct 5 by an air flow generated in the duct 5. The mesh tube 7 and the expansion hose 8 which are inserted into the inside of the conduit 5 by the pulling movement of the parachute 14 are kept in an unexpanded state until the lining is started. The resin being used is kept in a state where it does not flow out.

The mesh tube 7 inserted through the parachute 14 into the conduit 5 is expanded so that the resin 9 is attached to the inner surface of the conduit 5. An expansion hose 8 is used as a member for expanding the mesh tube 7, and a fluid pressure such as high-temperature pressure water can be supplied to the inside of the expansion hose 8 from a fluid pressure supply means (not shown). The fluid pressure using the high-temperature water is set to a pressure at which a sufficient amount of radial expansion is obtained to expand the mesh holes of the mesh tube 7.

The in-pipe lining construction using the in-pipe lining device 1 having the above-mentioned structure is executed according to the following procedure. (1) First step In this step, the mesh tube 7 is drawn into the inside of the conduit 5. To carry out this process, the expansion hose 8
The mesh tube 7 in the state where the
The end portion is pulled out from the mesh tube roller 2 and is carried into the resin liquid tank 3 via the feeding roller 4. The mesh tube 7 carried into the resin liquid tank 3 and the expansion hose 8 located inside the mesh tube 7 are held in advance by the unillustrated gripping means via the enclosing portion 12 between the feeding roller 12 and the conveying roller 11 ′ at the front end and rear portion thereof. Can be moved to a position. Delivery roller 12 and transport roller 1
The mesh tube 7 and the expansion hose 8 which are sandwiched by 1'are assembled by integrating the tips,
When the portion after the tip is fed out from the mesh tube roller 2, the resin is inflated in the radial direction when passing through the enlarging member 13 included in the enclosing portion 10 and the resin is flown into the inside.
The mesh tube 7 and the expansion hose 8 that have passed through the resin liquid tank 3 are temporarily stopped at the time when the tip is extended from the resin liquid tank 3, and the parachute 14 is connected to the tip portion. Although the mesh tube 7 and the expansion hose 8 to which the parachute 14 is connected are drawn into the pipe line 5, an airflow is generated in the pipe line 5 before the drawing. This air flow is obtained by connecting a duct (not shown) from a vacuum suction pump (not shown) to the opening at one end of the pipe 5 and making a negative pressure at one end of the pipe 5. To be
By inserting the parachute 14 into the other end of the conduit 5, the mesh tube 7 is inserted into the conduit 5 as a wire-passing member. Since the mesh tube 7 towed by the parachute 14 has not yet been expanded in the radial direction, the outer diameter dimension thereof is smaller than the inner diameter of the pipeline, and the resin sealed inside is kept in a state of not flowing out. It Therefore, the setting of the feeding amount of the mesh tube 7 in the resin liquid tank 3 and the parachute 14 described above are performed.
Due to the relationship with the moving speed of the mesh tube 7, the mesh tube 7 is stretched along the direction in which the mesh tube 7 is pulled, and it is suppressed that the mesh tube 7 is rubbed against the inner surface of the conduit 5 to reduce the movement resistance. The tip ends of the mesh tube 7 and the expansion hose 8 pulled by the parachute 14 are in a state of extending into the vertical hole 6 located at one end of the pipe line 5, and the tips of the mesh tube 7 and the expansion hose 8 and beyond A part is left inside the conduit 5.

(2) Second Step In this step, high-temperature pressure water, which is a fluid pressure, is supplied to the inside of the expansion hose 8 so that the resin in the mesh tube 7 is discharged to the outside. FIG. 5 is a schematic diagram for explaining this step. In FIG. 5, the mesh tube 7 and the expansion hose 8 that have reached one end of the conduit 5 have the ends of the expansion hose 8 even if the parachute 14 is removed. The mesh tube 7 expands in the radial direction in conjunction with the expansion of the expansion hose 8 because it is integrated and sealed as it is. When high-temperature pressurized water is supplied and the expansion hose 8 expands in the radial direction, the inner peripheral surface of the mesh tube 7 is also pressurized, so that the mesh tube 7 expands in the radial direction and the pipeline 5
The resin 9 that has approached the inner surface of the expansion tube 8 and has been filled into the gap between the inner peripheral surface of the mesh tube 7 and the outer surface of the expansion hose 8 is pushed out by the expansion of the expansion hose 8. In FIG. 5, for the sake of convenience, reference numeral C is used to indicate the means for supplying high-temperature pressurized water. The resin 9 extruded from the inside of the mesh tube 7 is
As indicated by reference numeral 9 ′, a lining film (indicated as a resin lining film in FIG. 5) is formed by applying pressure to and adhering to the inner surface of the conduit 5, and heat transfer from the high temperature pressure water is performed. As a result, the curing reaction between the main component, which is a component of the resin, and the curing agent is promoted.

(3) Third Step In this step, after the resin that has flowed out of the mesh tube 7 and adhered to the inner surface of the conduit 5 in the second step is cured,
The mesh tube 7 and the expansion hose 8 are taken out from the pipe line. When the mesh tube 7 and the expansion hose 8 are taken out, the high temperature pressurized water supplied to the inside of the expansion hose 8 is discharged to reduce the diameter of the expansion hose 8.
FIG. 6 is a schematic diagram for explaining this step. In FIG. 6, the end portion of the expansion hose 8 in which the distal end portions are gathered and integrated with each other is drawn into the mesh tube 7 as shown by an arrow. Mesh tube 7 by pulling in the opposite direction of time
Is pulled out toward the other end side of the pipe line 5 corresponding to the pull-in start end. As a result, the mesh tube 7 integrated with the expansion hose 8 moves together with the expansion hose 8 while the tip portion is folded back and separated from the inner surface of the conduit 5. In addition, since it is a necessary condition for smooth removal of the mesh tube 7 from the resin when the mesh tube 7 is taken out, a material having a good releasability from the resin is used as the material of the mesh tube 7. Preferably.

When the third step is completed, only the resin in a cured state remains on the inner surface of the pipe 5, and the resin lining is completed there. According to the present embodiment, the amount of resin flowing out from the inside of the mesh tube 7 can be controlled by adjusting the pressure of the high temperature pressure water that is the fluid pressure supplied to the expansion hose 8 in the second step. it can. The outflow amount of the resin can be also set by setting the axial center position of the feeding roller 12 of the sealing portion 10 included in the resin liquid tank 3.
The resin lining thickness on the inner surface of the can be set to an optimum thickness.

Next, the invention described in claim 2 will be described below. The invention according to claim 2 comprises steps common to the first step and the second step described in the description of the invention according to claim 1, and in the third step, the mesh tube 7 is left in the pipeline content. It is characterized by placing. FIG. 7 is a schematic diagram for explaining a third step which is an embodiment of the invention described in claim 2, in which the resin is the inner surface of the pipe 5 after the first and second steps are executed. After being adhered to and cured, the expansion hose 8 is taken out. In this step, when performing the second step, the vertical hole 6 of the pipeline 5 is
The mesh tube 7 exposed from the outside and the tip of the expansion hose 8 integrated with the mesh tube 7 are separated by cutting or the like. Cutting the mesh tube 7 and the expansion hose 8 is intended to prevent the cut ends of the mesh tube 7 and the expansion hose 8 from getting in the way when the openings of the conduit 5 are butted and connected to each other after the pipe lining is installed. Is
It is preferable that the process is performed without protruding from the opening at one end of the pipe 5. The expansion hose 8 separated from the mesh tube 7 is taken out to the outside of the conduit 5, but before the take-out, the fluid pressure inside is removed and then pulled out to the outside.

According to the above-described embodiment, the mesh tube 7 is left on the inner surface of the conduit 5 together with the lined resin 9 ', so that the mesh tube 7 is used as a backing material for reinforcing the lined resin. Therefore, the strength of the lining layer can be increased.

Next, the invention according to claim 3 will be described below. The invention according to claim 3 is characterized in that a plurality of lining layers are formed. Therefore, in the embodiment of the invention described in claim 3, the first to third steps described in the embodiment of the invention described in claim 1 are repeated according to the number of lining layers to be formed, and as an example. The above steps are repeated twice to form two lining layers. In this case, when the two lining layers described above are formed by making the characteristics of the resin different in each of the repeated steps, the lining layer using the resin having the characteristic of high shape retention and the seismic resistance are used. And a lining layer using a high resin.

According to this embodiment, the double lining having desired characteristics is provided on the inner surface of the pipeline by repeating the process of sealing the resin having different characteristics in the mesh tube and allowing the resin to flow out to the inner surface of the pipeline. Will be possible.

[0037]

As described above, according to the first aspect of the invention, the mesh tube drawn into the tube is expanded in the radial direction by the expansion hose so that the mesh hole of the mesh tube is expanded and the mesh tube is expanded. The resin enclosed inside is applied to the inner surface of the pipe, and after the resin is cured, the mesh tube and expansion hose can be taken out, so that the inner surface of the pipe can be lined with resin, so there is no need to prepare a tubular lining material in advance. Even the inner surface of the pipeline can be lined. As a result, the conditions required for the lining material can be satisfied without preparing a member as the lining material, and furthermore, the pipe lining construction by the resin lining can be easily performed.

According to the second aspect of the present invention, the mesh tube drawn into the tube is expanded in the radial direction by the expansion hose, so that the mesh hole of the mesh tube is expanded and the resin enclosed in the mesh tube is removed. By coating the inner surface of the pipe and after curing the resin, only the expansion hose is taken out, so that the inner surface of the pipe is lined with a combination of resin and mesh tube. It is possible to form layers.

According to the third aspect of the present invention, the mesh tube drawn into the tube is expanded in the radial direction by the expansion hose, so that the mesh hole of the mesh tube is expanded and the resin sealed in the mesh tube is removed. It is possible to form multiple lining layers by repeating coating on the inner surface of the pipe and hardening the resin, and then taking out the mesh tube and expansion hose.By forming resin layers with different properties as the lining layer, the desired properties can be obtained. It becomes possible to form a lining layer having

According to the invention as set forth in claim 4, since the mesh hole is expanded only when the mesh tube is expanded in the radial direction, in a state where the mesh tube is not expanded such as when it is drawn into the pipe,
Since it is possible to prevent the enclosed resin from flowing out,
It becomes possible to reduce the rubbing resistance at the time of pulling into the pipe and to easily perform the pulling operation.

According to the fifth aspect of the invention, the resin can be discharged from the mesh tube only when the fluid pressure flowing into the expansion hose acts, so that the resin is wastefully discharged at a position other than the lining construction position. It will be possible to prevent this from happening.

According to the sixth and seventh aspects of the invention, since the hardening reaction of the resin can be accelerated by the fluid pressure of the high temperature pressure water flowing into the expansion hose, the function different from the expansion action of the expansion hose can be exhibited. it can. Moreover, if the fluid pressure can be adjusted, it is possible to control the amount of resin flowing out of the mesh tube to set the optimum lining layer thickness and economically consume the resin. become.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a schematic configuration of an apparatus used in an embodiment of the invention described in claims 1, 4 to 7.

2 is a partial cross-sectional view for explaining the structures of a mesh tube and an expansion hose used in the device shown in FIG.

FIG. 3 is a schematic diagram for explaining the structure of a resin encapsulation portion used in the device shown in FIG.

FIG. 4 is a schematic diagram for explaining a configuration of a mesh tube and a pulling means for an expansion hose used in the apparatus shown in FIG.

5 is a partial cross-sectional view for explaining a state when a mesh tube and an expansion hose using the device shown in FIG. 1 are inflated.

FIG. 6 is a partial cross-sectional view for explaining a state where the expanded mesh tube and expansion hose shown in FIG. 5 are drawn out.

FIG. 7 is a partial cross-sectional view for explaining one step during the pipe lining construction according to the embodiment of the invention described in claim 2;

[Explanation of symbols]

1 In-pipe lining device 2 mesh tube roller 3 resin liquid tank 5 pipelines 6 vertical holes 7 mesh tube 8 Expansion hose 9,9 'resin 10 Enclosure 13 Enlargement member 14 Parachute forming a towing member

─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Motomitsu Honda 3-18-3 Daiwa City Kanagawa Pref., Hakko Technical Development Center Co., Ltd. (72) Inventor Hiroaki Kaneko 3-18 Daiwa City Kanagawa Prefectural Government No. 3 Inside the Hakko Technology Development Center, a stock company (56) Reference JP-A-10-146895 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B29C 63/34 F16L 1/00

Claims (7)

(57) [Claims] 1. A lining resin used in a pipe is enclosed in a porous mesh tube capable of expanding and contracting, and the mesh tube is drawn into the pipe in a first step and in the first step. Expand the mesh tube of the mesh tube by expanding the drawn mesh tube in the radial direction by the expansion hose previously inserted in the mesh tube, and let the enclosed resin flow out of the mesh tube. In-pipe lining construction, characterized in that it comprises a second step and a third step of taking out the expansion hose and the mesh tube after the resin flowing out of the mesh tube in the second step is cured. Method. 2. A lining resin used in a pipe is enclosed in a porous mesh tube capable of expanding and contracting, and the mesh tube is drawn into the pipe in the first step and in the first step. Expand the mesh tube of the mesh tube by expanding the drawn mesh tube in the radial direction by the expansion hose previously inserted in the mesh tube, and let the enclosed resin flow out of the mesh tube. An in-pipe lining construction method comprising the step 2 and a third step of taking out only the expansion hose after the resin flowing out of the mesh tube in the second step is cured. 3. A lining resin used in a tube is enclosed in a porous mesh tube capable of expanding and contracting, and the mesh tube is drawn into the tube in the first step and in the first step. Expand the mesh tube of the mesh tube by expanding the drawn mesh tube in the radial direction by the expansion hose previously inserted in the mesh tube, and let the enclosed resin flow out of the mesh tube. The second step and the third step of taking out the expansion hose and the mesh tube after the resin flowing out of the mesh tube in the second step is cured, and the first to third steps are performed. A pipe lining construction method characterized in that a plurality of lining layers are formed in the pipe by repeating. 4. The pipe lining construction method according to claim 1, wherein the mesh tube expands the mesh hole only when the expansion hose expands in the radial direction. Pipe lining construction method. 5. The pipe lining construction method according to any one of claims 1 to 4, wherein in the second step,
The expansion hose is an in-pipe lining construction method, wherein the mesh tube is radially expanded by a fluid pressure flowing therein. 6. The pipe lining construction method according to claim 5, wherein the fluid pressure is obtained by inflowing high temperature pressurized water.
The curing reaction of the resin for the above lining
A pipe lining construction method characterized by being promoted . 7. The in-pipe lining construction method according to claim 5, wherein the fluid pressure is adjustable .