JPH0356718Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is designed to repair or repair parts of pipe bodies such as pipe joints where leakage occurs or is likely to occur in underground pipelines such as gas pipes. This invention relates to a cover for sealing the pipe body of an underground pipeline used when repairing the seal for the purpose of preventive maintenance.

[Conventional technology]

When repairing an underground pipeline using a sealing cover as described above, a part of the pipe body at the repair point (pipe joint part) is exposed in a hole opened above ground by excavation, and the outside of the exposed part of the pipe body is The seal is repaired by wrapping the sealing cover from the outside, but in this case, the above-mentioned repair cover is made of heat-shrinkable synthetic material as described in Japanese Utility Model Publication No. 53-44104. The cover body is constructed of a resin sheet member, and the cover body is repaired by blowing flame from the outside to cause the cover body to adhere to the pipe body and seal by shrinking due to heating.
As described in Publication No. 3099, the cover body made of a flexible sheet member is wrapped around the tube body, and both ends are tightened with tightening bands, and then the annular space inside the cover is filled with sealing resin and solidified. It is known that the seal can be repaired by repairing the seal.

In the case of the former prior art, since flame is sprayed to heat the pipe, if the pipe to be repaired is a gas pipe and there is a gas leak in the repaired area, there is a risk of ignition. Since the work must be carried out with the gas flow interrupted within the repair area, there is an inconvenience that causes a great deal of inconvenience to gas demand customers in the vicinity of the repaired area.

In this respect, in the latter prior art, there is no need to interrupt the gas flow even in the pipe body where leakage occurs, so there is no problem like the former prior art mentioned above, but on the other hand, the annular space inside the cover Since sealing resin is filled and pressure is applied to the resin to solidify the resin to seal the leakage area, it is essential to take measures to prevent the filled resin from leaking out of the cover.

[The problem that the idea attempts to solve]

The present invention is based on a sealing cover that is repaired by filling the cover with resin and solidifying it, as seen in the latter prior art.

In such a sealing cover, since filling pressure is applied to the resin injected into the cover to solidify the resin as described above, it is necessary to take measures to prevent the resin from leaking out of the cover. When the joint edges of the cover wrapped around the pipe body are securely bound with a fastener, the problem that arises is that it is necessary to prevent resin leakage from the fastener joint (joint of the cover edges). at the same time,
Additionally, measures are required to prevent resin from leaking from the fastener seam due to the pressure applied to the injected resin.

The present invention addresses the above-mentioned problems and solves the problem of the resin injected into the cover leaking out from the fastener binding part, and at the same time, it also solves the problem of the resin injected into the cover leaking out from the fastener seam. The purpose of the present invention is to provide a cover for a body seal.

[Means to solve the problem]

In order to achieve this purpose, the pipe body sealing cover according to the present invention includes: (A) a fastener that binds both joint edges is sewn to the joint edge of the sheet-like cover body wrapped around the outside of the pipe body; (B) A cover main body to which the fastener is sewn, extending inwardly over one side of the joint edge of the cover body to which the fastener is sewn, straddling the other side of the joint edge, and affixed to the inner surface of the cover body to be joined by the fastener. (C) Extending the intervening crosslinked sheet piece to cover the inside of the seam of the fastener belt piece sewn to the other side joint edge while sealing the inside of the joint; (C) extending the crosslinked sheet piece; At the seam of the fastener belt piece sewn to the joint edge on one side,
One end of the sealing piece is sandwiched between the belt piece and the cover body and sewn at the same time, and the free end of the sealing piece is folded back and glued to the inside of the belt piece so that the seam is stapled. It is characterized by being configured to cover.

[Effect]

In such a configuration, at the joint part of the cover main body that is joined by fastener binding, a crosslinked sheet piece extending from one joint edge is pasted over the other joint edge and attached to the inner surface thereof. This ensures the sealing performance of the cover joint and prevents resin from leaking from the fastener joint.

Furthermore, the inside seam of the fastener belt piece sewn to the joint edge on the other side is covered by the above-mentioned cross-linked sheet piece, and the seam inside of the fastener belt piece sewn to the joint edge on the other side is covered by the cross-linked sheet piece. At the seam of the fastener belt piece, the free end of the seal piece, which is sandwiched between the belt piece and the cover body and one end sewn at the same time, is folded back and glued so that the seam is double-stitched. Since the structure covers the fastener belt piece, leakage of resin from the seam portion of the fastener belt piece is also prevented.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a perspective view of a tube seal cover showing an embodiment of the present invention, and Fig. 2 is an enlarged perspective view showing the fastener joint of the cover body. The cover body is shown. The cover body 1 is made of an airtight woven fabric whose inner surface is coated with resin. And cover body 1
is wrapped around the pipe joint A (see Figures 3 to 5), which is the repaired part of the pipe body, like the conventional one. A bulging portion 1c large enough to surround the flange portion of the pipe fitting portion A is formed at the intermediate portion between the right end portion 1a that is wrapped around the pipe body and the left end portion 1b that is wrapped around the other pipe body. Note that a cushion sheet 2a made of foamed resin is provided on each inner surface of the right end 1a and left end 1b of the cover body 1 to improve the tightness to the pipe body when tightening with the tightening bands 8, 8, which will be described later. , 2b are attached respectively.

In addition, the joint edge of the cover main body 1 that is wrapped around the tube constitutes a binding part using the fastener 3, so that a fastener belt piece 3a having a convex chuck claw on one side is attached to one joint edge, and a fastener belt piece 3a having a convex chuck claw is attached to the other side. A fastener belt piece 3b having a concave chuck claw on the other side to be combined therewith is sewn and fixed to the joining edge. These pair of fastener belt pieces 3a, 3b extend longer on both sides than the left and right width of the cover main body 1, and a slider 3c for binding is provided on one end side.
By moving c, both fastener belt pieces 3a, 3
When the chuck claws b are engaged with each other, the cover body 1
The joint edges of the two are joined to each other.

In the present invention, the fastener belt piece 3
One side (in the illustrated embodiment, the side to which the fastener belt piece 3a is fixed) of the joining edge of the cover main body 1 that is joined to each other by the binding of the parts a and 3b.
A bridging sheet piece 4 is extended to the joining edge of the other side and extends to the inner inner surface thereof, and when the end edge of the cover body 1 is joined by binding with the fastener 3, the above-mentioned The extending end of the crosslinked sheet piece 4 extends to the side of the joint edge to which the other fastener belt piece 3b is fixed, and is attached to the inner inner surface thereof. In addition, the above-mentioned crosslinked sheet piece 4 is
In the illustrated embodiment, left and right cushion sheets 2a are made of a cushion material made of foamed resin, etc., and are attached to the inner surfaces of the right end 1a and left end 1b of the cover body 1, as shown in FIG. ,2b
It extends for a required length over the entire width of the one joining edge in the width direction in a continuous form.

The crosslinked sheet piece 4 has an adhesive 4 on its outer surface.
c is applied to the outer surface of the sheet via the adhesive 4c, and a removable release sheet 4a is applied to the half-width portion of the free end in the extending length direction as shown in FIG. Also, a non-peelable sheet 4b that does not peel off is stuck to the half-width portion on the base end side (the portion corresponding to the binding portion of the fastener belt pieces 3a, 3b). In this embodiment, the release sheet 4a
and the non-peelable sheet 4b are made of release paper that can be separated along perforations 4d cut in the boundary between the two, and by peeling off the release sheet 4a, the surface coated with the adhesive 4c is exposed. Then, the free end side of the cross-linked sheet piece 4 is stuck to the inner surface of the other cover joining edge by the exposed adhesive 4c, and the binding part of the fastener 3 (joint part of the cover main body 1) is attached.
In addition, the above-mentioned crosslinked sheet piece 4 covers the inside of the seam 3b' of the fastener belt piece 3b sewn to the other cover joining edge.

Furthermore, when sewing the fastener belt piece 3a to the joint edge of the extended side of the crosslinked sheet piece 4 described above, as shown in FIG. One end of a band-shaped seal piece 10 sandwiched between them is sewn at the same time, and the free end side of the seal piece 10 is attached to the seam 3.
a' is folded back to the inside of the belt piece 3a so as to be double-stitched, and is glued so as to cover the inside of the seam 3a'.

In the illustrated embodiment, air-tight membranes 2a', 2b', 4' are formed on the inner surfaces of the cushion sheets 2a, 2b and the crosslinked sheet pieces 4. Further, on the outer surface of the cover main body 1, a guide protrusion 5 is protrudingly provided to regulate the band position when the tightening bands 8, 8 are tightened at the cover right end 1a and left end 1b, and the guide protrusion 5 is provided. A hook piece 9 is provided adjacent to the strip 5.

Further, a ventilation tube 6 is connected to the cover main body 1, and is located above the bulge 1c and communicates with the bulge 1c. A sealing resin filling tube 7 is connected to the bulging portion 1c and communicating with the opening.

To explain an example of repairing an underground pipe using the repair cover main body 1 configured as described above, first, as a pre-work step, the pipe body at the repair location (pipe joint part A) is cleaned to the minimum required size. Excavate the area in a hole that opens above the ground (see Figure 3).

The repair cover body 1 is assembled with the pair of fastener belt pieces 3a and 3b separated.
, and as shown in FIG.
either one side of the fastener belt pieces 3b, 3b or the other side of the fastener belt pieces 3b, 3b in the illustrated embodiment.
(b side) as a set, both ends of which are lowered into the excavated hole from the ground, bypassed under the pipe joint A using a hook rod, etc., and pulled up from the opposite side.
And this pulled up fastener belt piece 3
By pulling both ends of b and 3b, the unfolded cover body 1 is set to pass under the pipe joint A at the repair location (see FIG. 5).

In this state, a pair of fastener belt pieces 3a,
Both ends (4 pieces) of each fastener belt piece 3b extend outside the excavation hole and are located on the ground, and then a pair of fastener belt pieces 3
Slider 3 with a and 3b on one end side
When c is moved, the fasteners 3 are bound as shown in FIG. 6, and as a result of this binding, the winding joint edges of the repair cover main body 1 are joined to each other. The cover body 1 is wrapped and set so as to cover the pipe joint part A.

In this case, if the release sheet 4a is peeled off prior to binding the fastener 3, when the joint edges of the cover body 1 are adhered to each other by binding the fastener 3, one joint edge The extending portion of the extending cross-linked sheet piece 4 extends so as to bridge the inner inner surface of the other joint edge, and the half-width portion on the free end side is bonded to the other side by the adhesive 4c applied to the outer surface. By being attached to the inner inner surface of the edge, sealing performance at this portion is ensured, and the joint portion of the joining edge of the cover main body 1 due to the binding of the fastener 3 is airtightly sealed.

After the repair cover main body 1 is wrapped and set so as to cover the pipe joint part A at the repair location as described above, as shown in FIG. The left end portion 1b is tightened and fixed with a tightening belt 8 wound around it, and then, as shown in FIG. The air remaining in the gap between the outer surface of the joint part A and the outer surface of the joint part A is discharged upward through the tube 6, and the annular space in the bulge part 1c is filled with sealing resin.

When injecting and filling this sealing resin, a required filling pressure is applied to the injected resin in order to ensure the sealing effect by sufficiently infiltrating the resin into the gap of the pipe joint A where leakage occurs. In this case, the joint part of the cover body 1 wrapped around the pipe joint A at the repair point is bound by the fastener 3; The bridging sheet piece 4 extending from one joint edge is attached to the inner surface of the joint of the cover main body 1 extending over the other joint edge, so that the cover joint is sealed. The properties of the fastener 3 are ensured, and resin leakage from the binding portion of the fastener 3 is prevented.

Furthermore, due to the above-mentioned filling pressure applied to the injected resin, a phenomenon occurs in which the resin oozes out from the seams of the fastener belt pieces 3a and 3b, but in this case, the seam 3b' of the fastener belt piece 3b on one side is The inside of the fastener belt piece 3a is covered with the bridging sheet piece 4, and the seam 3a' of the fastener belt piece 3a on the other side is a seal piece 10 which is sandwiched between the belt piece 3a and the cover body 1 and whose one end is simultaneously sewn. Since the free end of the sealing piece 10 is folded back and glued to cover the seam 3a' to cover the inside of the seam 3a', the sealing piece 10 can be removed from the seam of the fastener belt pieces 3a and 3b. Resin leakage is also prevented.

After the above-mentioned work steps, wait for the sealing resin to solidify over time, and then, as shown in FIG. The excavated hole was backfilled and the repair completed.

[Effect of idea]

As explained above, according to the sealing cover according to the present invention, the joint part of the cover body 1 wrapped around the pipe joint part A at the repair location is bound by the fastener 3, and At the joint part of the cover main body 1 that is joined by the fastener 3, a bridge sheet piece 4 extending from one joint edge is pasted on the inner inner surface of the joint part straddling the other joint edge. Since the cover main body 1 is attached, the sealing performance of the joint portion of the cover main body 1 is ensured, and leakage of resin from the fastener binding portion can be prevented.

Further, in the pair of fastener belt pieces 3a and 3b sewn to the joint edge of the cover main body 1, the seam 3b' of one of the fastener belt pieces 3b is covered on the inner side of the seam by the above-mentioned bridging sheet piece 4. , the seam 3a' of the fastener belt piece 3a on the other side is bag-stitched by the free end of a seal piece 10, which is sandwiched between the belt piece 3a and the cover body 1 and one end of which is sewn at the same time. Since the structure is such that the belt piece 3a is folded back and glued to the inside of the belt piece 3a and the inside of the seam is covered, the resin oozes out from the seam of the fastener belt pieces 3a and 3b and leaks due to the filling pressure applied to the injected resin. Inconveniences caused by this can also be prevented.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a pipe body seal cover according to an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the fastener joint of the cover body, and Fig. 3 is a pipe joint at a repair location. FIG. 4 to FIG. 9 are perspective perspective views showing the work steps. 1... Seal cover body, 1a... Right end of cover body, 1b... Left end of cover body, 1c
...Middle bulging part of the cover main body, 2a, 2b...Cushion sheet, 3...Fastener, 3a, 3b
... Fastener belt piece, 3a', 3b'... Seam of fastener belt piece, 3c... Slider, 4...
...Crosslinked sheet piece, 4a... Release sheet, 4b...
Non-peelable sheet, 4c... Adhesive, 5... Guide protrusion, 6... Ventilation tube, 7... Resin-filled tube for sealing, 8... Sealing belt, 9... Hook,
10... Seal piece, A... Pipe joint part to be repaired.

Claims (1)

[Scope of claim for utility model registration] A part of the pipe body of an underground pipe to be repaired is exposed in a hole opened above ground by excavation, a sealing cover is wrapped around the outside of the exposed part of the pipe body, and both ends are tightened. After tightening with a band, the cover is filled with sealing resin and solidified to repair the seal. , a fastener is sewn to bind both jointed edges, and a fastener is sewn to one side of the jointed edge of the cover main body to which the fastener is sewn, and extends inwardly over the other side of the jointed edge and on the inner surface thereof. The intervening cross-linked sheet piece is extended to seal the inside of the joint of the cover main body that is pasted and joined by the fastener, and to cover the inside of the seam of the fastener belt piece sewn to the joining edge on the other side. At the seam of the fastener belt piece sewn to the joint edge on one side of the extended cross-linked sheet piece, one end of the sealing piece is sewn at the same time, sandwiched between the belt piece and the cover body. A tube body for an underground pipe, characterized in that the free end side of the seal piece is folded back and adhered to the inside of the belt piece so as to cover the inside of the seam so as to cover the seam. Seal cover.