JP3377705B2 - 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,
A first step of enclosing in a shrinkable porous mesh tube, squeezing the mesh tube to define the amount of resin enclosed in the mesh tube, and then pulling the mesh tube into the tube. First
By expanding the mesh tube drawn into the tube in the step of # 1 by the expansion hose that has been inserted in the mesh tube in advance, the mesh hole of the mesh tube is expanded, and the resin enclosed is sealed in the mesh tube. It has a second step of flowing out to the outside, and a third step of leaving at least the resin on the inner surface of the tube after the resin flowing out of the mesh tube in the second step is cured. I am trying.

According to a second aspect of the present invention, a mesh tube is formed into a bellows shape, one end of which is expandable and contractible is folded back, and the mesh tube is prepared together with an expansion hose inserted therein. While extruding the mesh tube in sequence by extruding, after injecting the lining resin used in the tube between the outer surface of the expansion hose and the inner surface of the mesh tube in the unwinding process, the mesh tube The first step of drawing into the tube and the mesh tube drawn into the tube in the first step are 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 a second step of allowing the encapsulated resin to flow out of the mesh tube; After the resin flowing out to the outside of the mesh tube 2 step curing, and characterized in that it comprises a third step of leaving at least the resin tube surface
It is.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the described pipe lining construction method, the third step is characterized in that the expansion hose and the mesh tube are taken out from the pipe after the resin is cured.

The invention according to claim 4 is the invention according to claim 1 or 2.
In the described pipe lining construction method, the third step is characterized in that only the expansion hose is taken out from the pipe.

The invention according to claim 5 is the same as that of claims 1 to 4.
In the pipe lining construction method described in one of them,
It is characterized in that a plurality of lining layers are formed in the tube by repeating the above first to third steps.

According to a sixth aspect of the present invention, there is provided a pipe lining construction method according to any one of the first to fourth 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 seventh aspect of the 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 an eighth aspect of the invention, in the pipe lining construction method according to the seventh 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 ninth aspect of the present invention, in the pipe lining construction method according to the seventh or eighth aspect, the fluid pressure is adjustable .

[0015]

According to the first aspect of the present invention, the resin enclosed in the mesh tube is squeezed to define the amount required for the lining and the mesh tube drawn into the tube is expanded in the radial direction by the expansion hose. Then, the mesh holes of the mesh tube are enlarged, and lining is performed with the resin enclosed in the mesh tube.

According to the second aspect of the present invention, the expansion hose is inserted into the bellows-shaped mesh tube, the bellows-shaped mesh tube is folded back in accordance with the feeding of the expansion hose, and its inner peripheral surface and the outer surface of the expansion hose are folded. A resin can be injected between the two to draw the mesh tube into the tube, and the expansion tube can expand the mesh tube in the radial direction to cause the injected resin to flow out to the inner surface of the tube for lining with the resin.

According to the third aspect of the present invention, the resin enclosed or injected is allowed to flow out, and after the resin is cured, the mesh tube and the expansion hose are taken out to form a lining made of only the resin.

According to the fourth aspect of the present invention, the resin enclosed or injected inside is discharged toward the inner surface of the pipe, and after the resin is cured, only the expansion hose is taken out and the resin and the mesh tube are combined on the inner surface of the pipe. The lining is done.

According to the invention of claim 5, claim 1
By repeating the first to third steps in
Te can be formed a plurality of lining layers.

In the invention according to claim 6, since the mesh hole is expanded only when the mesh tube is expanded in the radial direction, the enclosed resin is prevented from flowing out when the mesh tube is not expanded such as when it is drawn into the tube. it can.

In the invention of claim 7, 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 eighth and ninth 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, a function different from the expansion action of the expansion hose can be exerted. Moreover, if the fluid pressure can be adjusted, the amount of resin flowing out of the mesh tube can be controlled.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the first to third embodiments will be described according to the illustrated embodiments.
The described invention will be described. FIG. 1 is a schematic diagram for explaining the outline of an apparatus used in an embodiment of the pipe lining construction method according to the invention of claims 1, 3 to 9. Figure 1
In, the pipe lining device 1 is configured to include a mesh tube roller 2, a squeezing roller 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, and can maintain a contracted state by its own habits at other times. The resin 9 for the lining is a resin containing a main agent and a curing agent as components, and the inner peripheral surface of the mesh tube 7 and the expansion hose 8 due to the contraction of the mesh tube 7 and closing of the mesh holes. It is enclosed between the outer surface of and. The means for enclosing the lining resin 9 will be described later.

The resin 9 is sealed before the mesh tube 7 is drawn into the pipe line 5. That is, FIG.
Shows the mesh tube 7 and the expansion hose 8 wound around the mesh tube roller 2 before being pulled in. In FIG. 3, the mesh tube 7 wound around the mesh tube roller 2 has an expansion hose 8 inserted therein before being wound around the mesh tube roller 2, and the ends thereof are collected and sealed by a gripper 10. ing. Inside the mesh tube 7 whose tip is sealed,
The resin 9 is injected in advance before being wound. The resin 9 is injected, for example, by pouring it from the tips of the mesh tube 7 and the expansion hose 8 before being sealed. The injected resin 9 does not have to extend over the entire length of the mesh tube 7, and the amount of the resin 9 can be increased so that the mesh hole is not expanded near the tip. The reason for setting such an amount of injected resin is that by squeezing the mesh tube 7, the resin accumulated inside can be transferred in the longitudinal direction of the mesh tube 7 and spread over the entire length of the mesh tube 7. . Therefore, after resin injection,
On the side where the mesh tube 7 whose tip is sealed by the gripper 10 is fed out, the squeezing roller 3 facing the conveying roller 4 is arranged, and the squeezing roller 3 is displaced in the direction shown by the arrow in FIG. By doing so, the facing interval with the transport roller 4 is adjusted.

When the gap between the inner peripheral surface of the mesh tube 7 and the outer surface of the expansion hose 8 is adjusted, the amount filled in the gap is defined as the enclosed amount, and the resin exceeding the enclosed amount is It is transferred in the direction opposite to the feeding direction.

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, the parachute 11 is provided at the tip of the mesh tube 7 and the expansion hose 8 after passing through the squeezing roller 3 and the feeding roller 4.
Is attached. The parachute 11 is used as a wire-passing member that allows the mesh tube 7 to be inserted into the conduit 5, and can move in the conduit 5 by the airflow generated in the conduit 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 11 are kept in an unexpanded state until the lining is started, so that the mesh tube 7 is enclosed inside the mesh tube 7. The resin being used is kept in a state where it does not flow out.

The mesh tube 7 inserted through the parachute 11 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
Before being wound around the mesh tube roller 2, the resin 9 is introduced from the tip portion and the tip portion is collected so that the resin 9 is present between the inner peripheral surface of the mesh tube 7 and the outer surface of the expansion hose 8. Enclosed. The mesh tube 7 with the resin 9 sealed inside is wound around the mesh tube roller 2, and then the space between the squeezing roller 3 and the feeding roller 4 is adjusted to seal the mesh tube 7 per unit area. It is delivered in a specified amount. The mesh tube 7 and the expansion hose 8 that have passed through the squeezing roller 3 and the feeding roller 4.
Is temporarily stopped when the tip is extended, and the parachute 11 is connected to the tip. Parachute 11
Mesh tube 7 and expansion hose 8 connected to each other
Is drawn into the conduit 5, but an airflow is generated in the conduit 5 prior to the drawing. This air flow is in line 5
It can be obtained by connecting a duct (not shown) from a vacuum suction pump (not shown) to the opening at one end and making the one end side in the pipe line 5 a negative pressure. Parachute 11 through pipeline 5
The mesh tube 7 as a wire-passing member is inserted into the conduit 5 by inserting the mesh tube 7 into the other end. Since the mesh tube 7 towed by the parachute 11 has not yet been expanded in the radial direction,
The outer diameter of the resin is smaller than the inner diameter of the conduit so that the resin sealed inside is kept in a state of not flowing out. For this reason,
The mesh tube 7 is stretched along the direction in which the mesh tube 7 is pulled out due to the relationship between the setting of the delivery amount of the mesh tube 7 in the resin liquid tank 3 and the moving speed of the parachute 11, which is described above. It is possible to suppress the sliding resistance and reduce the movement resistance. The tip ends of the mesh tube 7 and the expansion hose 8 pulled by the parachute 11 are in a state of extending into the vertical hole 6 located at one end of the pipe line 5, and 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 ends of the mesh tube 7 and the expansion hose 8 that have reached one end of the conduit 5 are extended hose 8 even if the parachute 11 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,
At least the resin 9'applied to the inner surface of the pipe is left.
As a process for this, the mesh tube 7 and the expansion hose 8 are taken out from the pipe line. Mesh tube 7
When removing the expansion hose 8, the expansion hose 8
The high-temperature pressurized water supplied to the inside of the container is discharged, and the diameter of the expansion hose 8 is reduced. 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. The mesh tube 7 is pulled toward the other end side of the conduit 5 corresponding to the pull-in start end of the mesh tube 7 in the direction opposite to the time. 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 this resin can be also adjusted by adjusting the distance between the squeezing roller 3 and the feeding roller 4,
By using the control by both of them, the lining thickness of the resin on the inner surface of the conduit 5 can be set to the optimum thickness.

A modified example of the third step will be described below. In the third step, the resin 9'applied to the inner surface of the pipe
After curing, the treatment for leaving at least the resin 9'is carried out. As the treatment, the mesh tube 7 is left on the inner surface of the pipe together with the resin 9 '. For this reason,
Only the expansion hose 8 is taken out of the pipe 5. Figure 7
[Fig. 4] is a schematic diagram for explaining the above-mentioned process, in which the expansion hose 8 is taken out after the resin adheres to the inner surface of the conduit 5 and is cured after the first and second steps are performed.
In this step, when performing the second step, the pipeline 5
The mesh tube 7 exposed to the outside from the vertical hole 6 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 preferably performed without protruding from the opening at one end of the conduit 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 embodiment, since the mesh tube 7 is left on the inner surface of the conduit 5 together with the lined resin 9 ', the mesh tube 7 is lined with a reinforced resin backing material, so-called. The strength of the lining layer can be increased by using it as a member having the same function as the spine material.

Next, the invention according to claim 2 will be described. According to the second aspect of the present invention, the bellows-shaped mesh tube 7'is fed back while being folded back, and the feeding is performed by the expansion hose 8, and the resin is injected between the mesh tube 7'and the expansion hose 8. It has a feature. FIG. 8 is a schematic diagram for explaining the injection structure of the resin 9 used in the pipe lining construction method according to the second aspect of the present invention, in which reference numeral 20 indicates a filling tank. The side wall of the filling tank 20 is provided with an insertion portion 20A for supporting the expansion hose 8 so that the expansion hose 8 can be inserted. A resin-filled portion 21 formed of a funnel-shaped opening is formed on the side wall facing the insertion portion 20A. An opening / closing member 22 made of a flexible filler member is arranged inside the resin filling portion 21. Normally, the resin filling portion 21 is closed as shown by a two-dot chain line to prevent the resin from flowing out. Then, when pressure is applied from the inside, the resin-filled portion 21 is opened by being displaced as shown by the solid line. The pressure from the inside in this case means the filling pressure of the resin generated by the filling nozzle 23 described later.

Inside the filling tank 20, the resin filling section 2
In the vicinity of 1, a screw auger 2 supported by a flexible shaft
A filling nozzle 23 having 3A arranged therein is provided. The filling nozzle 23 is capable of flowing the resin in the filling tank 20 inside, and when the screw auger 23A is driven to rotate by the motor 24, the resin 9 present inside is directed to the resin filling portion 21. Flow to create an outflow pressure. This outflow pressure becomes the filling pressure of the resin 9.

On the other hand, on the outer peripheral surface of the resin-filled portion 21, a mesh tube 7'collected in a bellows shape is arranged. The mesh tube 7'can be inverted by sealing the tip and being pushed into the outer surface of the resin-filled portion 21, and when the expansion hose 8 is pushed out in this state, the bellows-like portion is sequentially inverted. Be paid out. Of the end portions of the mesh tube 7 ', the end portion on the opposite side to the end portion on the feeding side is pressed by a pressing means (not shown), and even if the bellows length becomes shorter as it is fed out, it is expanded. The hose 8 is adapted to be delivered following it.

In the filling tank 20 having the above structure, the resin is sealed inside the mesh tube 7'in the following procedure.
First, the expansion hose 8 is pulled out from the hose reel 25 around which the expansion hose 8 is wound and inserted into the filling tank 20, and a portion of a short length from the tip thereof is projected from the resin filling portion 21 to the outside. Maintained in a state. The mesh tube 7 ′ is inverted by pushing the sealed tip into the outer surface of the resin filling portion 21, and the inverted tip is made to face the tip of the expansion hose 8 and They are put together and connected to a traction member (not shown). In this state, since the filling pressure of the resin 9 by the filling nozzle 23 is not yet generated, the opening / closing member 22 is in contact with the outer peripheral surface of the expansion hose 8 and the resin filling portion 21 is closed. There is. When the motor 24 is started and the screw auger 23A rotates, the resin 9 present in the filling nozzle 23 flows, and the flow causes pressure to push the resin 9 toward the resin filling portion 21. Filling nozzle 2
When the filling pressure from 1 acts on the opening / closing member 22, the opening / closing member 22 swings to open the resin filling portion 21 as shown by the solid line in FIG. 8, so that the resin 9 flows out into the mesh tube 7 ′. And the encapsulation is started. When the encapsulation of the resin 9 is started and the mesh tube 7 ′ and the expansion hose 8 are towed by the tow member, both of them are fed out from the resin filling portion 21, and the tow speed corresponds to the outflow speed of the resin 9. Has been. As a result, although the mesh tube 7'is expanded in the pulling direction, the mesh tube 7'is maintained in a state in which it does not expand in the radial direction, which is the direction in which the mesh holes are expanded. 9 does not flow out.

The following procedure is executed for the pipe lining construction using the resin injection mechanism of the above construction. (1 ') First step In this step, in this step, the mesh tube 7 is drawn inside the conduit 5. In order to perform this step, the mesh tube 7 ′ can be inverted by being pushed at the outer surface of the resin-filled portion 21 with its tip sealed, and when the expansion hose 8 is pushed out in this state, , The bellows-shaped part is reversed and fed out. The resin 9 is injected through the filling nozzle 23 into the inside of the mesh tube 7 ′ which is extended in accordance with the extension hose 8 in the inverted state, and the injected resin 9 is squeezed by the squeezing roller 3 and the feeding roller 4. The amount of encapsulation per unit area is defined by the throttling action due to the spacing between and. The mesh tube 7'injected with the resin 9 has a parachute 1 at the tip thereof.
1, the parachute 11 is inserted into the pipe line 5 in which the in-pipe air flow is generated, as in the case described with reference to FIG. It is pulled in and inserted. Since the mesh tube 7 towed by the parachute 11 has not yet been expanded in the radial direction, the outer diameter dimension thereof is smaller than the inner diameter of the conduit, 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 11 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 11 are in a state of extending into the vertical hole 6 located at one end of the pipe line 5, and A part is left inside the conduit 5.

(2 ') Second step In this step, high-temperature pressurized water, which is a fluid pressure, is supplied to the inside of the expansion hose 8 to let the resin in the mesh tube 7 flow out. In this step, the same processing as the step described with reference to FIG. 5 is executed, and even if the parachute 11 is removed, the tip of the mesh tube 7 is integrated with the expansion hose 8 and sealed as it is. The mesh tube 7 expands in the radial direction in conjunction with the expansion of the expansion hose 8. 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 approaches the inner surface of the conduit 5. The resin 9 that has flowed into the gap between the inner peripheral surface of the mesh tube 7 and the outer surface of the expansion hose 8 and is filled therein is pushed out by the expansion of the expansion hose 8. The resin 9 extruded from the inside of the mesh tube 7 becomes a lining film by being pressed and attached to the inner surface of the conduit 5 as in the case described with reference to FIG. The heat transfer accelerates the curing reaction between the main agent, which is a component of the resin, and the curing agent.

(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,
At least the resin 9'applied to the inner surface of the pipe is left.
As the processing for this, as in the case described above, the case where the mesh tube 7 and the expansion hose 8 are taken out from the conduit and the case where only the expansion hose 8 is taken out are selected.

Next, the invention according to claim 5 will be described below. The invention according to claim 5 is characterized in that a plurality of lining layers are formed. Therefore, in the embodiment of the invention described in claim 5, 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
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. In the invention according to claim 5, since it is necessary to leave at least the resin after the resin is hardened, as in the case described above, in the case of taking out both the mesh tube 7 and the expansion hose 8 and in the case of taking out only the expansion hose 8. And are selected.

According to this embodiment, a 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.

[0044]

As described above, according to the first aspect of the invention, the mesh tube filled with the resin is drawn into the tube before being drawn into the tube, and then the mesh tube is radially expanded by the expansion hose. By expanding, the mesh hole of the mesh tube is expanded and the resin enclosed in the mesh tube is applied to the inner surface of the tube, and after the resin has hardened, at least the resin remains, so that the inner surface of the tube can be lined with resin. The inner surface of the conduit can be lined without preparing a tubular lining material in advance. As a result, the conditions required for the lining material can be satisfied without preparing a member as the lining material. Moreover, since the resin enclosed in the mesh tube is enclosed in a prescribed amount before it is drawn into the tube without dipping work, it is possible to prevent contamination of the surrounding area due to resin dripping. Therefore, it is possible to prevent deterioration of the working environment for the pipe lining.

According to the second aspect of the present invention, the expansion hose is inserted into the bellows-shaped mesh tube, and the bellows-shaped mesh tube is folded back while the expansion hose is being extended and the inner peripheral surface and the expansion hose are Resin can be injected between the outer surface and the mesh tube to draw it into the tube, and the expanded hose can expand the mesh tube in the radial direction to allow the injected resin to flow out to the inner surface of the tube and perform lining with the resin. Therefore, the space required for storing the mesh tube can be reduced. Moreover, since the resin is injected into the inside of the mesh tube, it is possible to prevent the resin from leaking to the outside as compared with the case where the resin is introduced from the outside, so that it is possible to prevent the peripheral portion from being contaminated.

According to the third aspect of the present invention, it is possible to form the lining made of only the resin by letting out the resin enclosed or injected inside and taking out the mesh tube and the expansion hose after the resin has hardened. Therefore, no special structure such as a tubular lining material is required, and the lining cost can be reduced.

According to the fourth aspect of the present invention, the resin sealed or injected inside is discharged toward the inner surface of the pipe, and after the resin is cured, only the expansion hose is taken out, and the resin and mesh tube are formed on the inner surface of the pipe. Since the lining layer is formed by combining the resin and the mesh tube, it is possible to form a lining layer having an increased strength by combining the resin and the mesh tube.

According to the invention of claim 5, claim 1
By repeating the first to third steps in
Since a plurality of lining layers can be formed by forming resin layers having different characteristics as the lining layer, it becomes possible to form a lining layer having desired characteristics.

According to the sixth aspect of the present invention, the mesh hole is expanded only when the mesh tube is expanded in the radial direction. Therefore, when the mesh tube is not expanded, such as when it is drawn into the tube,
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 seventh 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 eighth and eighth 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, it is possible to exert a function different from the expansion action of the expansion hose. 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, 3 to 9.

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 taken out.

FIG. 7 is a partial cross-sectional view for explaining a state in which only the expanded hose shown in FIG. 5 is taken out.

FIG. 8 is a schematic diagram for explaining a main part configuration of an apparatus used in an embodiment of the invention described in claim 2.

[Explanation of symbols]

1 In-pipe lining device 2 mesh tube roller 3 Aperture roller 4 feeding rollers 5 pipelines 6 vertical holes 7,7 'mesh tube 8 Expansion hose 9,9 'resin 11 Parachute forming a towing member 20 Resin filling part 21 Resin filling part 22 Opening / closing member 23 Filling nozzle

─────────────────────────────────────────────────── ─── 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-10-146894 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B29C 63/34 F16L 1/00

Claims (9)

(57) [Claims] 1. A resin for lining used in a pipe is enclosed in a porous mesh tube capable of expanding and contracting, and the amount of the resin enclosed in the mesh tube is defined by squeezing the mesh tube. The first step of drawing the mesh tube into the tube,
The mesh tube drawn in the pipe in the first step 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 to seal the enclosed resin. A second step of flowing out to the outside of the mesh tube, and a third step of leaving at least the resin on the inner surface of the tube after the resin flowing out to the outside of the mesh tube in the second step is cured.
The pipe lining construction method is characterized by including the steps of. 2. A mesh tube that is assembled in a bellows shape, is expandable and contractible, and has one end folded back, and prepares a mesh tube that is assembled together with an expansion hose inserted therein, and extrudes the expansion tube to form the mesh. The first step of drawing out the tubes one by one, and after injecting the resin for lining used in the pipe between the outer surface of the expansion hose and the inner surface of the mesh tube in the process of drawing out, the mesh tube And, the mesh tube drawn in the tube in the first step is expanded in the radial direction by an expansion hose previously inserted in the mesh tube to expand the mesh hole of the mesh tube and is enclosed. The second step of allowing the resin to flow out of the mesh tube and the mesh step in the second step described above. After leaked resin is cured to the outside of the cube, the third step and the tube lining how to characterized in that it comprises a allowed to remain at least the resin tube surface. 3. The pipe lining construction method according to claim 1 or 2, wherein in the third step, the expansion hose and the mesh tube are taken out from the pipe after the resin is cured. Method. 4. The in-pipe lining construction method according to claim 1, wherein in the third step, only the expansion hose is taken out of the pipe. 5. The pipe according to claim 1, wherein
In the inner lining construction method, a plurality of lining layers are formed in the pipe by repeating the first to third steps, and the inner lining construction method is characterized. 6. The pipe lining construction method according to any one of claims 1 to 4, wherein the mesh tube expands the mesh hole only when expanded in the radial direction by the expansion hose. Pipe lining construction method. 7. The pipe lining construction method according to claim 1, 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. 8. The pipe lining construction method according to claim 7, 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 . 9. The in-pipe lining construction method according to claim 7, wherein the fluid pressure is adjustable .