JPH10166447A - Partial lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a synthetic resin pipe only for the minimum necessary damaged area in an existing pipe. SOLUTION: A lining material 13 is inserted into an inner tube 5 of a lining jig 1 and the forward end of the material 13 is folded back so as to be superposed on the outer surface of a folded part of the tube 5 fixed to a supporting pipe 3. A shell-shaped sledge 15 is disposed before the jig 1, and the jig 1 storing therein the sledge 15 and material 13 is drawn by means of a drawing wire 11 and a release wire 16 as far as a predetermined repairing location of an existing pipe 12. The wire 16 is pulled at a forward manhole to pull out the sledge 15 and the wire 11 is pulled out at a rearward manhole to the side opposite to the pulling direction and the material 13 is reversed to press it against the inner surface of the pipe 12 to effect hardening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial lining method for forming a synthetic resin pipe in a damaged or deteriorated part of a sewer, a water supply, an oil supply pipe or any other existing pipe.

[0002]

2. Description of the Related Art In recent years, a lining method of forming a synthetic resin pipe on the inner surface of an existing pipe for the purpose of reinforcing the strength of the existing pipe such as a sewer or a water supply, preventing corrosion, preventing water leakage and flooding, or improving the flow rate has been spotlighted. I have.

The conventional lining method is disclosed in, for example,
As disclosed in JP-56531-A and JP-A-2-43024, a method of pulling and inserting the entire length of an existing pipe while heating and softening a lining material made of a thermoplastic resin pipe above its softening point, As disclosed in Japanese Patent Publication No. 12911, etc., the leading end of a guide tube connected to a pressure vessel and forming a pressure space is disposed near the end of an existing pipe such as a manhole, and the leading end of the guide tube is Inverting lining method in which the end of the lining material is folded back and fixed, the reversing surface of the lining material is advanced into the existing pipe by the fluid pressure of the pressure space, the lining material is inserted into the existing pipe, and the entire inner surface of the existing pipe is pressed. Has been adopted.

[0004]

According to the above-mentioned reversing lining method, the lining material can be inserted into the existing pipe and pressed against the inner surface of the existing pipe at the same time, and the synthetic resin pipe can be easily formed on the entire existing pipe. If the synthetic resin tube is formed only in the damaged part or the necessary minimum part that is degraded, if you try to insert the lining material only in that part, the folded end of the lining material will be inserted in the middle part of the existing pipe. In order to fix the part, it is necessary to form a pressure space by arranging the guide pipe connected to the pressure vessel to the middle part of the existing pipe. However, it is not easy to arrange the guide tube up to the middle part of the existing pipe, and it has been difficult to form the synthetic resin pipe only in a necessary part in the existing pipe by the reverse lining method.

For this reason, a lining material is turned upside down from a pipe end to a necessary part in an existing pipe to form a synthetic resin pipe, and then unnecessary parts are cut and removed. If unnecessary portions are cut and discarded in this way, the amount of lining material to be discarded increases, and materials are wasted.

The present invention has been made in order to improve such disadvantages, and has a partial lining in which a synthetic resin pipe can be easily formed only in a damaged part or a required minimum part of an existing pipe. It is intended to provide a construction method.

[0007]

In the partial lining method according to the present invention, a supporting member having a through hole provided with a resilient and locking a first stopper attached to a lead-in wire is provided at a rear end portion. Attach the cylindrical support tube attached to the front end, connect the pressurized fluid supply hose to the rear end, and attach a sealing plate attached with the fluid recovery hose. The inner tube connected to the pressurized fluid supply hose is housed with the front end opened and the rear end sealed, and the front end opening of the inner tube is folded back to form a rear outer periphery of the support tube. Fixed to the surface, storage tube and inner
A flexible resin tube in which a curable resin is impregnated in an inner tube of a lining jig having a pressure space formed by the tube.
In front of the lining jig in which the lining material is stored, the tip of the lining material is inserted into the inner tube fixed to the support tube, and the tip of the lining material is folded over a fixed length and overlapped with the outer peripheral surface of the folded portion of the inner tube. A bullet-type sled having a through hole provided at a predetermined distance in front of the first stopper of the lead-in wire and engaging a second stopper passing through the through hole of the support, and having a detachment wire attached to the front surface. The pull-in wire is drawn from the end of the second stopper side through the through-hole of the support of the lining jig, pulled out from the through-hole of the shell type sled, and the ends of the pull-in wire and the release wire are pulled out of the front manhole.
After pulling the lead wire and release wire with the front manhole and pulling the lining jig containing the sled and the lining material to the predetermined repair position of the existing pipe, the release wire is pulled forward. After pulling out the sled by pulling with a manhole, pulling out the pulling wire in the opposite direction to the drawing direction with the rear manhole, and then forming the pressure formed by the inner tube and the storage tube from the pressurized fluid supply hose. Supply pressurized fluid to the space,
The inner tube is inflated to press the end of the lining material against the inner surface of the existing pipe, and a pressurized fluid is further supplied to insert the inner tube into the existing pipe by inverting the lining material to reverse the lining material. It is characterized by being cured after being pressed against the inner surface of the tube.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the partial lining method of the present invention, a synthetic resin pipe is formed at a damaged or deteriorated portion in an existing pipe by using a lining jig and a drawing jig. Lining jig attached to the tip and a cylindrical support tube mounted on the rear end portion of the support which the through-holes of diameter D ₁ has elasticity provided, the support tube, the pressurized fluid supply e on the rear end -A storage tube with a sealing plate attached with a fluid recovery hose and a fluid recovery hose, and a resin film with tensile strength, with the front end opened and the rear end sealed, and housed inside the storage tube. An inner tube connected to the pressurized fluid supply hose,
The front end opening of the inner tube is folded back and fixed to the rear outer peripheral surface of the support tube, and a pressure space is formed by the storage tube and the inner tube.

The retracting jig is composed of a bullet-shaped sled, a retracting wire and a detaching wire. The bullet-type sled has a reinforcing member having a through hole with a diameter D _{2 at} the tip, and a diameter greater than the diameter D ₂ of the through hole of the reinforcing member at the center of the inner surface. D ₁ wire support is mounted with a through hole of a small diameter D ₃ than are disengaged wire is attached to the front. The lead-in wire passes through the through-hole of the support of the lining jig and the through-hole of the wire support, and is locked to the through-hole of the reinforcing member. From the reinforcing member to the wire support behind the second stopper, A third stopper which is provided at a position corresponding to the distance of the lining jig and which passes through the through hole of the support of the lining jig and is engaged with the through hole of the wire support, and which is provided at a fixed distance behind the third stopper. The lining jig has a first stopper which is locked in a through hole of the support.

When forming a synthetic resin pipe in a damaged or deteriorated portion of an existing pipe, an inner tube of a lining jig is provided with a lining material made of a flexible resin tube impregnated with a curable resin. Then, the tip of the lining material is folded back by a predetermined length and overlapped on the outer peripheral surface of the folded portion of the inner tube fixed to the support tube. A shell-type sled is placed in front of the lining jig that houses the lining material, and the lead-in wire is passed through the through-hole of the lining jig support from the end on the second stopper side. The wire is pulled out from the through hole of the reinforcing member through the hole, and the leading ends of the lead-in wire and the release wire are connected to the front manhole. After pulling in the pull-in wire and the release wire with the front manhole and pulling the lining jig containing the sled and the lining material to a predetermined repair position of the existing pipe, the release wire is pulled with the front manhole. After pulling out the sled and pulling the pull-in wire in the direction opposite to the pull-in direction with a manhole at the rear, pressurized fluid is supplied from the pressurized fluid supply hose into the pressure space formed by the inner tube and the storage tube. The inner tube is expanded to press the end of the lining material against the inner surface of the existing pipe, and further pressurized fluid is supplied to insert the inner tube upside down into the existing pipe to remove the lining material. Invert and press against the existing pipe inner surface, then harden

[0011]

FIG. 1 is a sectional view showing a lining jig, a lining material, and a drawing jig according to an embodiment of the present invention. As shown in the figure, the lining jig 1 has a storage tube 2, a support tube 3, a sealing plate 4, an inner tube 5, and a support device 6. The storage tube 2 is made of a heat-resistant flexible resin pipe, and a support tube 3 made of a metal or hard resin cylindrical tube having a fixed length is attached to a tip thereof, and a pressurized fluid supply hose is provided at a rear end thereof. And a sealing plate 4 to which a fluid recovery hose 8 is attached. The inner tube 5 is made of a resin film having heat resistance and tensile strength. The inner tube 5 is opened at the front end, the rear end is sealed and connected to the pressurized fluid supply hose 7 by the rope 9, and the storage tube 2 is opened. Is housed inside. Inner
The opening of the distal end of the tube 5 is folded back and fixed to the rear side of the outer peripheral surface of the support tube 3. The storage tube 2 and the inner tube 5 form a pressure space 10. The support 6 is made of a plurality of U-shaped springs made of elastic metal or synthetic resin, is attached to the rear end of the support tube 3, and holds the support tube 3 with elastic force acting in the outer peripheral direction. This support 6 has a through hole 61 of a certain size D ₁ through which the lead-in wire 11 passes.
Is provided.

[0012] Lining material 1 lining inside existing pipe 12
Reference numeral 3 denotes a hollow long tube body coated or impregnated with a curable resin such as a woven fabric or a nonwoven fabric, and the length thereof is determined according to the length of a damaged portion or a deteriorated portion in the existing pipe 12. Is determined. The lining material 13 may be formed by combining reinforcing fibers such as glass or carbon with either the inner layer and the outer layer or the inner layer and the outer layer in order to strengthen the strength, and furthermore, the outermost layer and the innermost layer or any one of them. The impermeable layer may be formed by laminating an impermeable film or applying an elastomer resin or the like. The curable resin to be applied or impregnated may be any of a room temperature curable resin, a heat curable resin, a photocurable resin, and the like.

The lining material 13 is folded to reduce the cross-sectional area so that the inner tube 5 can be used in a manhole or outside.
The support tube 3 has a distal end protruding outward from the distal end of the support tube 3 by a predetermined length corresponding to the diameter of the existing pipe 12. The front end of the lining material 13 is folded back so that the inner surface is on the outside, and is overlapped by a fixed length L on the outer peripheral surface of the folded portion of the inner tube 5 fixed to the support tube 3.

The retracting jig 14 has a sled 15 having a bullet-shaped tip, a retracting wire 11 and a detachment wire 16 attached to the sled 15. As shown in the cross-sectional view of FIG. 2, the sled 15 has a reinforcing member 17 attached to the front end, and has wire supports 18 and 19 at the center and rear end of the inner surface. The tip of the sled 15 and the reinforcing member 17 are provided with through holes 171 having a diameter D ₂ through which the lead-in wire 11 passes, and the wire supports 18 and 19 also have through holes 18 having a diameter D _3.
1,191. Reinforcing member 1 has
7 and a third stopper provided at a position corresponding to the distance from the reinforcing member 17 to the wire support 19 at the rear end behind the second stopper 20. It has a stopper 21 and a first stopper 22 provided at a fixed distance behind the third stopper 21.
The second stopper 20 and the third stopper 21 are formed in a conical shape with a tapered rear end, and have an outer diameter d ₁ of the second stopper 20.
And the outer diameter d ₂ of the third stopper 21 and the first stopper 2
Outer diameter d ₃ of 2 is formed such that a relationship of _{d 1 <d 2 <d 3} . The diameter D of the through hole 171 of the reinforcing member 17
₂ and the diameter D ₃ of the through holes 181 and 191 of the wire supports 18 and 19 and the through hole 61 of the support 6 of the lining jig 1.
Outer diameter d ₁ to d is the diameter D ₁ of the respective stoppers 20, 21, 22
₃ is formed so as to satisfy the relationship of D ₂ <d ₁ <D ₃ <d ₂ <D ₁ <d ₃ . The detachment wire 16 is attached to the front of the sled 15.

Lining jig 1 containing lining material 13
When the wire is pulled into the existing pipe 12 from the manhole, the sled 15 of the pull-in jig 14 is arranged in front of the lining jig 1, and the pull-in wire 11 is moved from the end on the second stopper 20 side. After passing through the through hole 61 of the support 6, the wire support 19, 1 of the sled 15 of the drawing-in jig 14.
8 through the through holes 191 and 181, and is pulled out from the through hole 171 of the reinforcing member 17. When the leading end of the pull-in wire 11 is pulled out in this way, the second stopper 2 of the pull-in wire 11
The 0 and the third stopper 21 pass through the through hole 61 of the support 6, but the first stopper 22 hits the through hole 61 of the support 6. In this state, when the tip of the drawing wire 11 is further pulled out, the tip of the lining jig 1 containing the lining material 13 is drawn into the sled 15. When the second stopper 20 hits the reinforcing member 17 and the third stopper 21 hits the wire support 19 at the rear end of the sled 15, the tip of the lining jig 1 is covered with the sled 15 by a certain length. As shown in FIG. 1, the exposed portion of the lining material 13 that is folded back is protected. At this time, since the pull-in wire 11 is supported by the two wire supports 18 and 19 in the sled 15, the leading end of the lining jig 1 can be covered with the sled 15 without hindrance without sagging.

Thereafter, the retracted wire 11 and the detachment wire 1
The front end of the wire 6 is led to the front manhole, and the pull-in wire 11 and the detachment wire 16 are pulled by the front manhole.
The lining jig 1 containing the sled 15 and the lining material 13 is drawn into the existing pipe 12 by keeping the sled 15 and the lining material 13 at constant intervals by the pulling wire 11 and the detachment wire 16. When the lining jig 1 is pulled into the existing pipe 12 in this manner, the distal end of the lining jig 1 is supported by the support 6 on the existing pipe 12.
Of the lining material 13 does not come into contact with the sled 15 or the bottom of the existing pipe 12, so that the folded and exposed portion of the lining material 13 is damaged or the impregnated resin is squeezed. Can be prevented. Further, even if the existing pipe 12 has irregularities, the lining jig 1 can be pulled in stably.

When the lining jig 1 reaches a predetermined repair position of the existing pipe 12, the pulling of the pull-in wire 11 and the detachment wire 16 is temporarily stopped. Then, the detachment wire 16 is pulled by the front manhole and the sled 15 is pulled out. Further, the pull-in wire 11 is pulled out by a manhole at the rear side in a direction opposite to the pull-in direction. At this time, the second stopper 20 and the third stopper 21 attached to the pull-in wire 11 have a tapered conical rear end, so that the through-holes 181 and 191 of the wire supports 18 and 19 of the sled 15 are not provided. It is possible to smoothly pass through the through-hole 61 of the support 6 and collect the entire lead-in wire 11 in the rear manhole.

Thereafter, the pressurized fluid is supplied from the pressurized fluid supply hose 7 to the pressure space 10 formed by the inner tube 5 and the storage tube 2 with the fluid recovery hose 8 closed. When the pressurized fluid is supplied to the pressure space 10, the folded portion of the inner tube 5 first expands as shown in the sectional view of FIG. 3, and the folded and exposed portion of the lining material 13 is the existing pipe. 12 and is pressed and fixed. When the pressurized fluid is further supplied in this state, the inner tube 5 is connected to the existing pipe 1.
2 and the lining material 13 is turned over and the existing pipe 12 is turned over.
Press on the inner surface. The amount of movement of the pressurized fluid supply hose 7 when the liner 13 is inserted upside down is confirmed.
When the entire structure 3 is pressed against the inner surface of the existing pipe 12, the pressure space 10 is passed through the pressurized fluid supply hose 7 and the fluid recovery hose 8.
A heated and pressurized fluid is circulated in the pressure space 10, for example.
The curable resin impregnated in the lining material 13 is cured while being kept at a temperature of 60 to 80 ° C. for a predetermined time.

After the curable resin impregnated in the lining material 13 has hardened, the pressure and temperature of the heated pressurized fluid circulating in the pressure space 10 are reduced, and the pressurized fluid supply hose 7 is moved to the rear And the inner tube 5 is separated from the hardened lining material 13 and collected in the storage tube 2. Thereafter, the pressurized fluid supply hose 7 and the fluid recovery hose 8 are drawn into the rear manhole, and the lining jig 1 is recovered.
A synthetic resin tube is formed in a predetermined portion of the above.

In the above-described embodiment, the case where the curable resin impregnated in the lining material 13 inserted reversely is cured by the temperature of the heating and pressurizing fluid, but depending on the properties of the curable resin impregnated in the lining material 13, It may be cured at room temperature, or may be cured by light from an ultraviolet lamp or the like or heat from a heater or the like.

In the above embodiment, the case where the sled 15 is provided with the two wire supports 18 and 19 has been described.
One wire support 18 may be provided at the center of the sled 15.

[0022]

As described above, the present invention provides a lining jig in which a pressure space is formed by an inner tube and a storage tube having a cylindrical support tube attached to the tip and a sealing plate attached to the rear end. A lining material is inserted into the inner tube of the tool, the tip of the lining material is folded over a predetermined length, and the lining material is overlapped on the outer peripheral surface of the folded portion of the inner tube fixed to the support tube. Since a shell type sled was placed in front of the stored lining jig, and the lining jig storing the sled and the lining material was pulled into the existing pipe with a pull-in wire that locked both the sled and the lining jig, The lining jig containing the lining material can be easily pulled into the existing pipe.

When the lining jig is pulled into the existing pipe, the tip of the lining jig is held at the center of the existing pipe by the support. It is possible to prevent the folded portion of the lining material from being exposed and damage to the exposed portion or squeezing out of the impregnated resin without contacting the inside. Further, even if the existing pipe has irregularities, the lining jig can be pulled in stably.

Further, when the lining jig storing the lining material is pulled into a predetermined position, the sled with the lining jig pulled in can be easily pulled out, so that the sled removal time can be shortened. .

Also, a pressurized fluid is supplied to the pressurized space of the lining jig to expand the inner tube and press the end of the lining material against the inner surface of the existing pipe to fix the lining material. Can be fixed at any position on the existing pipe, the lining material can be inserted only into the damaged or deteriorated part of the existing pipe, and the synthetic resin pipe can be inserted only into the minimum necessary part of the existing pipe. Can be formed.

Further, since the synthetic resin pipe is directly formed only in the necessary minimum portion of the existing pipe, no extra work time is required for removing the unnecessary portion of the lining material, and the material of the lining material can be saved. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing a lining jig, a lining material, and a drawing jig according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a retracting jig.

FIG. 3 is a cross-sectional view showing reversal of the lining material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lining jig 2 Storage pipe 3 Support pipe 4 Sealing plate 5 Inner tube 6 Support tool 7 Pressurized fluid supply hose 8 Fluid recovery hose 10 Pressure space 11 Lead wire 12 Existing pipe 13 Liner 14 Retraction Jig 15 Sled 16 Release wire

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuhiro Marubayashi 2-1-60 Yanagishima, Chigasaki City, Kanagawa Prefecture

Claims (1)

[Claims] 1. A cylindrical support tube having a through-hole provided at a rear end thereof and having a through hole for retaining a first stopper attached to a lead wire and having elasticity is attached to a front end, and a rear end is provided. A pressurized fluid supply hose is communicated to the end, and a storage tube with a sealing plate attached with a fluid recovery hose is made of a resin film having tensile strength. The front end is opened and the rear end is sealed. The inner tube connected to the pressurized fluid supply hose is housed, and the opening at the end of the inner tube is folded back and fixed to the outer peripheral surface of the rear part of the support tube.
A flexible resin tube in which a curable resin is impregnated in an inner tube of a lining jig having a pressure space formed by the tube.
In front of the lining jig containing the lining material, insert the lining material consisting of A bullet-type sled having a through hole provided at a predetermined distance in front of the first stopper of the lead-in wire and engaging a second stopper passing through the through hole of the support, and having a detachment wire attached to the front surface. The pull-in wire is passed through the through-hole of the support of the lining jig from the end on the second stopper side, and then pulled out of the through-hole of the shell type sled. The ends of the pull-in wire and the release wire are moved to the front manhole. After passing through the wire and pulling the pull-in wire and release wire with the front manhole and pulling the lining jig containing the sled and the lining material to the predetermined repair position of the existing pipe, the release wire is After pulling out the sled by pulling with a hole, pulling out the pull-in wire with a manhole on the opposite side to the pull-in direction, and then forming the pressure formed by the inner tube and the storage tube from the pressurized fluid supply hose. A pressurized fluid is supplied to the space, the inner tube is expanded, the end of the lining material is pressed against the inner surface of the existing pipe, and the pressurized fluid is further supplied to invert the inner tube into the existing pipe. A partial lining method characterized in that the lining material is inserted, turned upside down, pressed against the inner surface of the existing pipe, and then hardened.