JPH05123912A - Drilling method for branching part of pipeline with lining and equipment therefor - Google Patents

Abstract

PURPOSE:To prevent cloth from remaining on the peripheral edge of a through hole as pieces of cloth or fiber chips and from remaining partially connected to the cutting section by performing drilling on the lining blocking a branching section from the inner side of the pipeline at the branching section of a pipeline or the face to which the cloth is exposed out of a branch pipe. CONSTITUTION:A lining member 2 is stuck to the internal surface of a pipeline 1, and a branching section is blocked by the lining member 2. The lining member 2 comprises cloth 5 arranged on the outer surface of a main layer comprising SMC4, and the cloth 5 is exposed to the inside of a branch pipe 3. A drilling bit 8 is inserted through the junction pipe 3, and drilling is performed from the side of the face of the lining member 2 on which the cloth 5 is exposed by the drilling bit 8. With this constitution, a through hole 7 without disorder is bored. In the case where the cloth 5 is arranged on the inner surface of the SMC due to the convenience in lining work, drilling is performed with a drilling bit 8 from the inside of the main pipeline 1 to which the cloth 5 is exposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipeline that is mainly buried in the ground such as a sewer pipe, and after the pipeline is lined with a lining material and then the pipeline is blocked. The present invention relates to a method for perforating a part and allowing a conduit and a branch pipe to communicate with each other.

[0002]

2. Description of the Related Art As a method for lining sewer pipes, etc., a sheet molding compound (SMC) is prepared by dispersing glass fibers in a curable resin liquid such as unsaturated polyester resin to thicken the curable resin liquid. Sheet,
It is rolled into a tubular shape to form an inner lining material, which is drawn into the pipeline, expanded to conform to the inner surface of the pipeline, and heated to cure the curable resin liquid, and the FRP rigid on the inner surface of the pipeline. A method of forming a pipe lining is known.

Further, in this method, in order to prevent local strain of the lining material when the lining material is expanded, SM is used.
It is also practiced that a cloth such as a thin woven cloth is arranged on one side of C and the SMC and the cloth are integrally rolled to form an inner lining material so that the cloth is on the outside.

On the other hand, when the pipeline has a branch portion, when the pipeline is lined, the lining material 2 formed on the inner surface of the pipeline 1 closes the branch portion as shown in FIG. And pipeline 1
The communication with the branch pipe 3 is lost, and the pipe line is no longer used.

Therefore, it has been practiced to perforate the liner 2 having the branched portion closed from the inside of the pipe line 1 so that the pipe line 1 and the branch pipe 3 are communicated with each other. A hole saw or the like can be used to perforate the lining material 2.
It is also possible to use the special instrument shown in Japanese Patent Publication No. 161607/1990.

[0006]

However, in the pipe lined with the lining material 2 in which the SMC 4 and the fabric 5 are superposed as described above, when the perforation is performed from the inside of the pipe line 1 as described above, The fabric 5 forming the outer surface is SM
It may peel off from C4 and may not be perforated properly.

In particular, since SMC4 has a thickened curable resin liquid in which glass fibers are dispersed, it has poor fluidity and the curable resin liquid does not impregnate the fabric 5, so that the fabric 5 is applied to the surface of the SMC4. Only attached, not integrated. Therefore, at the time of punching, the cloth 5 is easily separated and peeled off.

That is, as shown in FIG. 2, when the hole Saw 6 is used for punching, the hardened SMC 4 is cut into a circle to form a through hole 7, but the cloth 5 wrapping the outer surface of the SMC 4 is SM.
The cloth 5 does not peel off from the surface of the C4 and is not perforated by the hole saw 6 as a part of the rigid lining material 2 integral with the SMC 4.

As a result, although the cloth 5 is partially cut by moving the hole saw 6 upward, it cannot be cut off from the lining material 2 over the entire circumference, and finally it is shown in FIG. As described above, it remains partially connected to the cut portion 4'of the SMC 4 and cannot be completely cut.

When the boring bit 8 as shown in Japanese Utility Model Laid-Open No. 63-161607 is used for boring, the rigid SMC 4 at the branch portion may be cut by the boring bit 8 to form the through hole 7. However, even in this case, since the cloth 5 is soft, it cannot be cut together with the SMC 4.

Although the cloth 5 can be broken by moving the punching bit 8 upward while rotating at a high speed, the cloth 5 is torn apart unlike the case of grinding a rigid material. Is torn and part remains on the inner circumference of the through hole 7,
Further, the fibers in the cloth 5 are loosened to form fiber scraps 9 and cover the through holes 7.

Therefore, the cut portion 4'and the fiber waste 9 remain in the through hole 7 and hinder the communication between the branch pipe 3 and the pipe line 1. In particular, in the sewer pipe, sewage containing solids passes, so the solids are caught by the cut portion 4'and the fiber scraps 9, and the pipe line is clogged at the branch portion.

The present invention has been made in view of such circumstances, and is an inner lining material 2 in which SMC 4 and fabric 5 are overlapped.
The branch portion of the pipe lined with the
The purpose is to allow the branch pipe 3 and the conduit 1 to smoothly communicate with each other without causing a hole.

[0014]

The first aspect of the present invention relates to a perforation method, in which a lining material formed by superposing a main layer formed by impregnating fibers with a curable resin liquid and a thin cloth is used as a conduit. A pipe lined inside the pipe line at the branch portion of the pipe line or among the branch pipes, in which the curable resin liquid is cured to form an inner lining made of a rigid FRP pipe on the inner surface of the pipe line. From the surface where the cloth is exposed, the inner liner that closes the branch portion is perforated.

The second invention is also a perforation method, wherein an inner lining material made by superposing a main layer formed by impregnating fibers with a curable resin liquid and a thin cloth is arranged in a pipe line to obtain the above-mentioned curability. In a pipeline formed by curing a resin liquid to form a rigid FRP pipe lining on the inside surface of the pipeline, the inside of the pipeline at the branch portion of the pipeline or the surface of the branch pipe where the fabric is exposed From the opposite side, the branch is pierced into the closed lining, and then the peripheral edge of the through-hole is ground from the surface through which the cloth is exposed by passing a through-hole through the punched tool.

A third aspect of the present invention relates to a punching tool, which is characterized in that a grinding tool is integrally attached to a rear portion of the punching tool.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 shows an embodiment of the first invention,
As shown in (a), an inner lining material 2 is laid on the inner surface of the pipe line 1 and is lined, and the lining material 2 closes the branch portion.

In the lining material 2, a cloth 5 is arranged on the outer surface of the main layer made of SMC 4, and the cloth 5 is exposed in the branch pipe 3 at the branch portion.

Then, the perforation bit 8 is inserted through the branch pipe 3, and the perforation bit 8 perforates the lining material 2 from the side where the cloth 5 is exposed. As a result, as shown in FIG. 4B, the through holes 7 having no disturbance are formed.

When the cloth 5 is arranged on the inner surface of the SMC 4 for the convenience of the lining work, as shown in FIG. 5, the cloth 5 is perforated with a perforation bit 8 from the side of the main pipe 1 where the cloth 5 is exposed.

In FIGS. 4 and 5, the case where the perforation bit 8 is used for perforation is described, but even when the perforation is performed using the hole saw 6, the perforation is performed from the side where the fabric 5 is exposed so that there is no disturbance. Through holes 7 can be formed.

Next, FIG. 6 shows an embodiment of the second invention.
In this embodiment, a liner 2 is lined and lined on the inner surface of the pipe 1, and the branching is closed by the liner 2. The lining material 2 has the cloth 5 arranged on the outer surface of the SMC 4, and the cloth 5 is provided at the branching portion.
Are exposed in the branch pipe 3.

Thus, in FIG. 6 (a), the punch bit 8
Pierces the lining material 2 at the branch portion from the side opposite to the exposed surface of the cloth 5, that is, the side inside the main pipe 1. Here, as described in the conventional example, the cloth 5 is shredded and the fiber scraps 9 are generated.

Next, as shown in FIG. 6B, a wire brush 10 having a diameter slightly larger than the diameter of the through hole 7 is inserted into the through hole 7 from the inside of the main pipe 1, and the wire brush 10 surrounds the periphery of the through hole 7. The portion is ground from the side where the cloth 5 is exposed, that is, from the inside of the branch pipe 3, and the scraps of the cloth 5 and the fiber scraps 9 remaining on the periphery of the through hole 7 are removed.

Since individual wires of the wire brush 10 are flexible and can be bent, they can easily pass through the through holes 7 having a diameter smaller than the diameter of the wire brush 10, and the periphery of the through holes 7 is ground to prevent disturbance. Through holes 7 can be formed.

FIG. 7 shows another embodiment of the second invention,
This is an example of a case where the branch portion of the lining material 2 is perforated with a hole saw 6.

FIG. 7A shows a state in which the lining material 2 that closes the branch portion of the pipe line 1 is perforated from the inside of the main pipe 1 by the hole saw 6 on the side opposite to the face on which the fabric 5 is exposed. The cut portion 4 ′ is partially connected by the cloth 5.

Next, as shown in FIG. 7B, the wire brush 10 is inserted into the through hole 7 from the inside of the main pipe 1, and the peripheral edge of the through hole 7 is exposed by the wire brush 10 to the side where the fabric 5 is exposed, that is, Grinding is performed from the inside of the branch pipe 3, and the cloth 5 that connects the peripheral edge of the through hole 7 and the cut portion 4 ′ is cut. After that, the wire brush 10 is returned to the inside of the main pipe 1, and the cut-out portion 4'is cut through the through hole 7
Through mains 1 through.

FIG. 8 shows some examples of the punching device of the third invention, which shows the drilling of the lining material 2 and the subsequent grinding of the peripheral edge of the through hole 7 in the method of the second invention. It is a perforating device that can be performed in one step.

FIG. 8 (a) shows a wire brush 10 integrally attached to the rear portion of the head of the perforating bit 8. After the perforating bit 8 is used to perforate the lining material 2 at the branching portion, the perforating bit 8 is used as it is. Can be moved upward through the through hole 7, and while being pulled back into the main pipe 1, the peripheral edge of the through hole 7 can be ground with the wire brush 10 to remove the scrap of the cloth 5 and the fiber waste 9.

Further, FIG. 8B shows a wire brush 10 integrally attached to the rear portion of the hole saw 6, and after the hole saw 6 is used to punch the branch liner 2, the hole saw 6 is passed through the through hole 7 as it is. Move it up and main 1
While pulling back inward, the peripheral edge of the through hole 7 can be ground with the wire brush 10 to cut the cloth 5 connecting the cut portions 4 '.

FIG. 8 (c) shows a structure in which a grinding blade 11 is integrally formed on the rear peripheral edge of the head of the drill bit 8, and the drill bit 8 is used to drill the branch liner 2 and then the drill bit is used as it is. 8 is moved up through the through hole 7 and is oscillated while being pulled back into the main pipe 1, and the peripheral edge of the through hole 7 is ground by the grinding blade 11 to remove the scrap of the cloth 5 and the fiber waste 9. it can.

FIG. 8 (d) shows a grinding blade 11 integrally formed on the rear edge of the hole saw 6, which is used to punch the branch liner 2 with the hole saw 6 and then to pass the hole saw 6 through the through hole 7 as it is. It is possible to move the cloth 5 upward through the main pipe 1, swing it while pulling it back into the main pipe 1, grind the peripheral edge of the through hole 7 with the grinding blade 11, and cut the cloth 5 connected to the cut portion 4 ′.

FIG. 9 shows a situation in which the present invention is applied to perforate when the lining material 2 has the cloth 5 on its inner surface. The lining material 2 is opposite to the cloth 5 from the inside of the branch pipe 3. The perforation is performed by the perforation bit 8, and then the periphery of the through hole 7 is ground by the wire brush 10.

Also in this case, the hole saw 6 can be used as the punching tool, and the grinding blade 11 can be used as the grinding tool.

In the above description, the wire brush 10 and the grinding blade 11 are given as examples of the grinding tool for grinding the peripheral edge of the through hole 7, but a buff, a disc grinder or the like may be used.

However, in the present invention, since the cloth 5 is pressed against the hardened SMC 4 by the grinding tool to grind it, the grinding tool is likely to be clogged by the ground fiber or resin. Therefore, it is most preferable to use a wire brush that is relatively unlikely to cause clogging as the grinding tool.

[0039]

In the first aspect of the present invention, since the cloth 5 in the lining material 2 is pierced from the exposed side, the piercing bit 8
The punching tool such as the hole saw 6 and
4 will be punched while being pressed against the fabric 4, and the fabric 5 will be SMC.
4 does not come off, and the fabric 5 is perforated prior to the SMC 4.

Therefore, when the perforation is performed by the perforation bit 8, the fabric 5 is perforated integrally with the SMC 4, and the cut end of the fabric 5 does not remain on the peripheral edge of the through hole 7 or the fiber scrap 9 is not generated.

Even when the hole saw 6 is used for punching, the fabric 5 is pressed against the SMC 4 and the fabric 5 is cut before the SMC 4. Therefore, when the cut portion 4'is cut off from the SMC 4, the fabric 5 has already been cut. It has been cut all the way around and will not remain partially connected.

Further, in the second invention, since the branch portion of the lining material 2 is perforated from the side opposite to the side where the cloth 5 is exposed, at this stage, as in the conventional example, the perforation bit 8 is formed.
In the case of using, the cut edge of the cloth 5 remains on the periphery of the through hole 7 or the fiber scrap 9 is generated, and in the case of punching with the hole saw 6, the cloth 5 is not partially cut and the cut portion 4'will remain connected.

Then, in the next step, the grinding tools 10, 11
Through the through hole 7, and the peripheral edge of the through hole 7 is ground from the side where the cloth 5 is exposed, whereby the cloth 5 connecting the scraps remaining on the peripheral edge of the through hole 7, the fiber waste 9, and the cut portion 4 ' The part is ground and removed, and the peripheral edge of the through hole 7 is adjusted.

Further, in the device of the third invention, the lining material 2 is perforated by the perforating tools 6 and 8 at the tip end thereof, and the through hole 7 is formed.
After forming the hole, the punching tool can be passed through the through hole 7 as it is, and the periphery of the through hole 7 can be ground with the grinding tools 10 and 11 integrally attached to the rear part of the punching tools 6 and 8 while retracting the tool. The perforation and the subsequent grinding of the peripheral edge of the through hole 7 can be performed in one step.

[0045]

According to the present invention, in the case where the pipe line 1 is lined with the lining material 2 formed by superposing the main layer 4 made of fibers impregnated with the curable resin liquid and the thin cloth 5, the pipe When the branch portion of the passage 1 is perforated, the cloth 5 does not remain as a scrap or a fiber scrap 9 on the peripheral edge of the through hole 7, or remains partially connected with the cut portion 4 ′. The branch pipe 3 and the conduit 1 can be smoothly communicated with each other by adjusting the peripheral edge, and a solid substance or the like is not caught and clogged.

Further, according to the perforating device of the third aspect, the perforation of the lining material 2 and the subsequent grinding of the peripheral edge of the through hole 7 can be performed in one step, so the work is simple and can be performed in a short time. You can

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing a state of a branched portion of a lined pipe.

FIG. 2 is a central longitudinal sectional view showing a state in which a lining material at a branch portion of a pipeline is perforated with a hole saw by a conventional method.

FIG. 3 is a central vertical cross-sectional view showing a state in which a lining material at a branch portion of a pipeline is perforated with a perforation bit by a conventional method.

FIG. 4 is a view showing a state in which the fabric is perforated by the method of claim 1 in a branch portion of the lining material on the outer surface of the main layer,
(A) shows before piercing, (b) shows after piercing.

FIG. 5 shows a state in which a cloth is perforated by a method of claim 1 in a branch portion of an inner lining material on an inner surface of a main layer,
(A) shows before piercing, (b) shows after piercing.

6A and 6B show a state in which a branch portion of the lining material is punched with a punch bit by the method of claim 2, wherein FIG. 6A shows a state immediately after punching with the punch bit, and FIG. 6B shows a through hole with a grinding tool. The state where the peripheral edge of is ground is shown.

FIG. 7 shows a state in which a branch portion of the lining material is punched with a hole saw by the method of claim 2, (a) shows a state immediately after punching with a hole saw, and (b) shows a peripheral edge of a through hole with a grinding tool. It shows the state of being ground.

FIG. 8 is a front view showing various examples of the punching device according to claim 3;

FIG. 9 is a central longitudinal cross-sectional view showing a state where the branch portion of the lining material having the cloth on the inner surface of the main layer is perforated by the method of claim 2.

[Explanation of symbols]

 1 Pipeline 2 Lining Material 3 Branch Pipe 4 SMC (Main Layer) 5 Cloth 6 Hole Saw (Drilling Tool) 7 Through Hole 8 Drilling Bit (Drilling Tool) 10 Wire Brush (Grinding Tool) 11 Grinding Blade (Grinding Tool)

Claims (3)

[Claims] 1. An inner lining material made by superposing a main layer made of fibers impregnated with a curable resin liquid and a thin cloth is arranged in a pipe line, and the curable resin liquid is cured to form an inner surface of the pipe line. In the pipeline that forms the lining made of rigid FRP pipe,
From the surface of the inside of the pipe in the branch portion of the pipe or the surface of the branch pipe where the fabric is exposed, perforation is performed on the lining that closes the branch, the branch of the lined pipe. Drilling method 2. An inner lining material formed by superposing a main layer formed by impregnating fibers with a curable resin liquid and a thin cloth is arranged in a pipe line, and the curable resin liquid is cured to form an inner surface of the pipe line. In the pipeline that forms the lining made of rigid FRP pipe,
From the inside of the pipe in the branch portion of the pipe or from the side opposite to the surface of the branch pipe where the fabric is exposed, perforate the inner lining that closes the branch, and then pass the perforated hole through a grinding tool. A method for punching a branched portion of a lined pipe, characterized by grinding a peripheral edge of a through hole from a surface where a cloth is exposed. 3. A drilling instrument for a branched portion of a lined pipe, wherein a grinding tool is integrally attached to a rear portion of the punching tool.