JP3418258B2 - Pipe line lining 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 pipeline lining method for inserting a synthetic resin lining material into an existing pipeline, and particularly to a large-scale pipe warmer or boiler for heating the lining material. The present invention relates to a pipeline lining method that does not require heating equipment.

[0002]

2. Description of the Related Art Existing pipelines buried underground or the like are corroded and deteriorated due to long-term construction, and there is a concern that leakage from defective portions such as pinholes may occur. One of the solutions is a method of pulling a synthetic resin pipe such as a PVC pipe into the aged pipe and rehabilitating the aged pipe. This P
Since the VC pipe has a protective property at room temperature,
After rehabilitation repair, it is known to have excellent anti-seismic properties against earthquakes.

Next, an example of the above-mentioned construction method is shown in FIG.
This will be described with reference to (b) and FIG. As shown in the figure, the flat PVC pipe 50 is connected to the boiler 54.
It is softened by steam heating by a pipe warmer 53 equipped with and is drawn into the conduit P by a pulling wire 55 using a winch 52. Then, as shown in FIG. 12B, the PVC pipe after being inserted into the pipe is expanded again by steam heating to fit the inside surface of the pipe line. Then, PVC as it is
By replacing the inside of the pipe with pressurized air and cooling and hardening the PVC pipe, a new lining pipe having the required strength and shape retention is formed in the pipe line P.

[0004]

By the way, the above-mentioned conventional pipe lined construction method has some problems as described below. One of them requires a pipe warmer and a boiler in order to draw the PVC pipe into the pipe P and fit the inner surface of the pipe. In addition, since the PVC pipe must be fitted to the inner surface of the pipeline and then the interior of the pipeline is replaced with pressurized air to harden the PVC pipe once softened, an air compression facility for generating pressurized air is required. Has become indispensable. Therefore, it is difficult to reduce the construction cost because a large-scale facility is required for the lining construction of the pipeline and the thermal energy required for each work is considerably used.

The second is that when the PVC pipe as the lining material is drawn into the conduit P, no shape processing is applied to the PVC pipe, so that the existing conduit where communication cables and the like are laid is installed. On the other hand, the communication cable in the pipeline must be temporarily removed before the lining work. Since the removed communication cable is laid inside the pipeline again after the lining construction, the labor required for the construction is added, and the cost of the whole construction is further increased.

In view of the above-mentioned problems, the present invention, when constructing a lining for a preexisting pipeline using a resin lining material, constructs a proper pipeline lining without using large-scale equipment. At the same time, in the case of communication cable piping, the purpose is to provide a pipeline lining method that can be installed without removing the communication cable.

[0007]

In order to achieve the above-mentioned object, the present invention provides a pipeline lining construction method in which a resin lining material is inserted and crimped into a pipeline for constructing a lining,
The inner lining material is formed by rolling a resin sheet member so as to have a gap of a required width, and forming rail portions facing each other with the gap therebetween, and fitting a spacer in the gap. In such a state, the outer diameter thereof is made to be approximately the same as the inner diameter of the pipeline, and the lining material in a reduced diameter state and the spacer are inserted into the pipeline from one end opening of the pipeline. Then, the lining material is expanded in diameter in the conduit, and the spacer is partially fitted and positioned in the gap, and the spacer is press-fitted into the gap at one end side of the conduit. Is loaded on the rail portion of the lining material and the press-fitting jig is moved to the other end side to press-fit the spacer into the gap portion and crimp the lining material to the inner surface of the pipeline. Lining method.

Another feature is that an adhesive is distributed on the pressure-bonding surface of the spacer and the spacer is fixed to the inner surface of the conduit when the spacer is press-fitted.

Further, an adhesive bag containing an adhesive resin is disposed on the pressure-bonding surface of the spacer, and when the spacer is press-fitted, the spacer is made of an adhesive resin that flows out due to the damage of the adhesive bag due to the pressure input. Another feature is that it is fixed to the inner surface of the road.

Further, another feature is that unevenness is formed on both side surfaces of the gap portion, and corresponding unevenness which can be engaged with the uneven side surface is formed on both side surfaces of the spacer. .

[0011]

According to the present invention having the above-described structure, the lining material is formed by rolling the resin sheet member into a substantially cylindrical shape having a gap portion of a required width. The diameter can be reduced and it can be easily retracted into the conduit. At that time, when a communication cable or the like is laid in the pipeline, the communication cable is held in the lining material through the gap and drawn into the pipeline. Then, after expanding the diameter of the lining material in the pipe line and restoring it to a substantially cylindrical shape, a spacer is fitted in the gap portion, and from one end side to the other end side of the pipe line along the rail portion integrally formed with the lining material. Move the press fitting jig.
By the movement of the press-fitting jig, the spacers are sequentially press-fitted into the gap portion, so that the diameter of the lining material is further expanded and pressure-bonded into the pipe line to form the lining pipe inside the pipe line. Pipe line lining method can be implemented.

Further, by disposing an adhesive bag containing an adhesive or an adhesive resin on the pressure-bonding surface of the spacer, when the spacer is press-fitted, in the case of the adhesive bag, the adhesive resin is crushed on the pressure-bonding surface. By flowing out, the spacer is fixed to the inner wall of the conduit. Therefore, the spacer will not fall out of the gap due to vibration such as an earthquake.

Further, by providing the concavo-convex portions on both side surfaces of the spacer and both end portions of the gap portion, it is possible to prevent the spacer from coming off due to the fitting force thereof.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 indicates an lining material drawn into the existing pipeline P, and the lining material 1 is a material used for a PVC pipe or the like having a protective formation,
A substantially rectangular resinous sheet member having a length approximately equal to the total length of the pipe P is rolled into a substantially cylindrical shape, and at that time, a gap portion 1a having a width L is formed, and the gap portion is further formed. 1a
Rail portions 1b are formed so as to face each other with the pinch in between. The end surface of the gap portion 1a is formed to be an inclined surface, and when the lining material 1 is formed into a cylindrical shape, the inside of the lining material 1 is widened as shown in FIG. . Further, the rail portion 1b is provided with the lining material 1
Is formed over the entire length thereof, and is formed in a U-shaped concave section so that a later-described press-fitting jig can be inserted and moved along the same.

Since the lining material 1 formed in this way has the gap portion 1a over the entire length thereof, it is given a higher flexibility than the conventional lining material which has not been shape-processed,
It can be inserted into the conduit P even without being heated. At that time, since the continuous gap portion 1a is provided over the entire length of the lining material 1, the lining material 1 is
As shown in FIG. 2, it can be deformed into a V shape and reduced in diameter, so that it can be easily drawn into the conduit P. that time,
When a communication cable or the like is laid inside the pipeline, the communication cable is held in the liner 1 through the gap 1a and drawn into the pipeline P.

In FIG. 3, reference numeral 3 denotes a spacer fitted and press-fitted over the entire length of the gap portion 1a of the lining material 1 after being inserted into the conduit P. The spacer 3 has a length that is substantially the same as the entire length of the lining material 1, and further has a trapezoidal cross section in a trapezoidal shape so as to fit in the gap portion 1a. As a result, the spacer 3 can be smoothly fitted into the gap portion 1a, and in the state of being fitted and press-fitted into the gap portion 1a of the lining material 1, its outer diameter is equal to the inner diameter of the conduit P. It will be about the same.

Further, as shown in FIG. 3, the adhesive is distributed on the pressure-bonding surface of the spacer 3 which is in contact with the inner surface of the conduit P. The adhesive is applied on the pressure-bonding surface of the spacer 3, or as shown in FIG. 3, an adhesive bag 5 in which an adhesive resin is embedded in thin vinyl is placed on the pressure-bonding surface of the spacer 3 at a predetermined interval. It is arranged.

Next, the construction method of the present invention will be described. First, as shown in FIG. 2, the lining material 1 is deformed into a V shape and reduced in diameter, and then drawn into the conduit P using a winch or the like. On this occasion,
When a communication cable or the like is laid inside the conduit P, the communication cable is held in the liner 1 through the gap portion 1a and drawn into the conduit P. Further, the spacer 3 is pulled into the pipe line P. Next, the lining material 1 drawn into the pipeline P is expanded at one end or both ends of the pipeline P by using a hand or a jig to be restored into a substantially cylindrical shape, and if necessary, temporarily held in that state. Stop it. And the gap portion 1a formed in a trapezoidal shape
Then, the spacer 3 is fitted. At this time, since the spacer 3 is formed in a trapezoidal cross-sectional shape, the positioning at the time of fitting becomes easy, and by fitting the spacer 3 further, as shown in FIG. It becomes possible to position within. At that time, the spacer 3 fitted in the gap portion 1a may extend over the entire length of the gap portion 1a, or may be, for example, only a partial end portion. Further, although the gap portion 1a is described as being located above in the drawing, it may be located below or laterally, and particularly when it is located below, the spacer 3 can be fitted relatively easily. Will be able to.

Next, the spacer 3 is press-fitted into the gap 1a with a jig 7.
Press in using. As shown in FIGS. 5 and 6, the press-fitting jig 7 has a substantially rectangular cross section and its upper surface abuts on the inner surface of the lining material 1 so that the shape can be loaded on the rail portion 1b of the lining material 1. Is formed in an arc shape. Also,
The outer surface is made of metal or the like having low frictional resistance in order to smoothly move the rail portion 1b. The pulling wire 9 is connected to the press-fitting jig 7 configured as described above and is inserted in advance from one end side to the other end side of the conduit P. And in FIG.
As shown in FIGS. 6 and 7, the press-fitting jig 7 is loaded into the rail portion from one end of the rail portion 1b and pulled along the rail portion to the other end. As the press-fitting jig 7 is pulled from one end to the other end, the spacer 3 positioned as shown in FIG. 4 is completely press-fitted into the gap portion 1a. When the spacer 3 is press-fitted into the gap 1a, the adhesive bag 5 disposed on the pressure-bonding surface of the spacer 3 bursts and the adhesive flows out to the contact surface between the spacer 3 and the inner surface of the conduit P. It will be. Thereby, the spacer 3 is fixed to the inner surface of the conduit P so as not to fall off.

After the spacer 3 is completely fitted and press-fitted into the gap portion 1a of the conduit P, the press-fitting jig 7 is removed from the rail portion 1b. FIG. 8 shows a state after the spacer 3 is press-fitted. Since the lining material 1 in which the spacer 3 is press-fitted in the gap portion 1a is adapted to spread in the circumferential direction of the pipe line P, it is pressed into the pipe line. Therefore, it is possible to perform the liner lining work without performing the conventional work of fitting the lining material to the inner surface of the pipe line by using the heating means.

In FIG. 9, when the lining material 1 is formed into a cylindrical shape, the end surface of the gap portion 1a has an inverse tapered shape in which the inside is narrowed, and the gap portion 1a is formed into a substantially inverted trapezoidal shape. Will be done. The spacer 3 is also formed in an inverted trapezoidal shape so as to fit in the gap 1a. After the spacer 3 is fitted and press-fitted into the gap portion 1a thus formed by the above-described method, the mating surface between the gap portion 1a and the spacer 3 is formed in an inverse tapered shape. Since the pressing force of (1) acts in the upward direction, that is, on the inner wall side of the conduit P, the spacer is fixed without dropping from the gap portion 1a. Further, by making the width of the spacer 3 slightly wider than the width of the gap portion 1a, the spacer 3 which is forcibly pressed in is inserted.
Will be more reliably fixed to the gap portion 1a.

Further, FIGS. 10 and 11 show the spacer 3 and the gap portion 1a of the lining material 1 having other shapes. 10 and 11, unevenness is formed on both end surfaces of the lining material 1, that is, both side surfaces of the gap portion 1a, and unevenness that can be engaged with the unevenness is formed on both side surfaces of the spacer 3. . By using the gap portion 1a having the irregular side surface and the spacer 3, the spacer 3 does not fall off without using an adhesive as described above, and the pipe line tensioning work according to the present invention can be performed more efficiently. Become.

[0023]

According to the present invention, since the lining material is formed by rolling a resin sheet member into a substantially cylindrical shape having a gap portion of a required width, the lining material is deformed into a V-shape and contracted. It has a diameter that allows it to be easily retracted into the conduit. Since the spacer is pressed into the gap to expand the lining material in the circumferential direction, the entire lining material can be crimped to the inner wall of the pipe line, and a proper pipe can be used without using a pipe warmer or a boiler as in the past. The road lining method can be constructed. As a result, the facility cost can be significantly reduced, and the thermal energy required for each construction can be completely saved.

Further, when the lining work is performed on the existing pipe on which the communication cable is laid, the communication cable can be held in the lining material through the gap.
It will be possible to perform lining work without removing the existing communication cable. Therefore, it becomes possible to completely eliminate the labor required for removing the communication cable from the pipe to be lined and laying it again after the liner construction, as in the conventional case, and it is possible to reduce the cost of the entire construction.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lining material of the present invention.

FIG. 2 is a sectional view of the pipeline showing a state in which the lining material is inserted into the pipeline.

FIG. 3 is a perspective view showing a spacer inserted into a gap portion of an inner lining material.

FIG. 4 is a cross-sectional view of the conduit showing a state in which a part of the spacer is aligned with the gap portion.

FIG. 5 is a vertical cross-sectional view of a pipeline when a spacer is press-fitted into a gap using a press-fitting jig.

FIG. 6 is a perspective view showing a press-fitting jig.

FIG. 7 is a cross-sectional view of a pipe line when a spacer is press-fitted into a notch using a press-fitting jig.

FIG. 8 is a cross-sectional view of the pipeline showing a state after the spacer is inserted into the gap portion of the lining material.

9 is a cross-sectional view of a conduit showing a trapezoidal spacer in the opposite direction to that shown in FIG.

FIG. 10 is a cross-sectional view of a pipeline showing a gap and a spacer whose side surfaces are uneven.

FIG. 11 is a cross-sectional view of a conduit showing a gap and a spacer whose side surfaces are uneven.

FIG. 12 (a) is a perspective view showing a state before expansion of a conventional lining material.

FIG. 12 (b) is a perspective view showing a state of the conventional lining material after expansion.

FIG. 13 is an explanatory view showing a pipe lined lining method in the prior art.

[Explanation of symbols]

1 lining material 1a gap 1b Rail section 3 spacers 5 adhesive 7 Press-fitting jig 9 Towing wire

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 1/00 B29C 63/30 F16L 55/16

Claims (4)

(57) [Claims] 1. A pipe liner lining method in which a resin liner material is inserted and crimped into a pipe line for constructing a liner, wherein the liner material is formed by rolling a resin sheet member to form a gap portion having a required width. Rail portions facing each other with a gap therebetween are formed in a substantially cylindrical member formed so that the outer diameter of the rail portion is approximately the same as the inner diameter of the pipeline when the spacer is fitted in the gap portion. A lining material having a reduced diameter and the spacer are inserted into the pipeline from one end opening of the pipeline to expand the diameter of the lining material in the pipeline, and the spacer is used as a gap portion. And position it by partially fitting it into the rail, and at one end side of the pipe line, insert a press-fitting jig for press-fitting the spacer into the gap into the rail portion of the lining material, and move the press-fitting jig to the other end side. By moving, the spacer is pressed into the gap and the lining material is removed. A pipe liner lining method characterized by crimping to the inside of the pipe line. 2. The pipeline lining construction method according to claim 1, wherein an adhesive is distributed on a pressure-bonding surface of the spacer, and the spacer is fixed to the inner surface of the pipeline when the spacer is press-fitted. . 3. An adhesive bag containing an adhesive resin is provided on the pressure-bonding surface of the spacer, and when the spacer is press-fitted, the spacer is made of an adhesive resin that flows out due to the rupture of the adhesive bag due to the pressure input. The pipe lining method according to claim 1, wherein the pipe lining is fixed to the inner surface of the passage. 4. A concavo-convex shape is formed on both side surfaces of the gap portion,
The pipe liner lining method according to claim 1, wherein corresponding concave and convex shapes that can be engaged with the concave and convex side surfaces are formed on both side surfaces of the spacer.