JPH0650719Y2 - Cover for pipe seal of underground pipe - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a pipe sealing cover for repairing a part of a pipe from the outside, such as a pipe joint portion of an underground laying pipe, for example, a gas pipe.

[Prior art]

This type of pipe seal cover has a hole that opens to the ground, exposes the portion of the pipe to be repaired of the underground pipe, and covers the cover body outside the exposed portion of the pipe. It is used in a repairing method in which an annular space formed between the cover body and the tubular body is wrapped and filled with a sealant to be solidified and the portion to be repaired of the tubular body is sealed from the outside (for example, a special method). (See Japanese Utility Model Laid-Open No. 61-96285 and Japanese Utility Model Laid-Open No. 61-70689). In this case, in order to fill the annular space with the sealant, a sealant injection tube, an internal space and a lead-out tube for leading out the excess sealant are connected to the cover body, and the sealant is inserted via the former. While filling
Internal air is discharged through the latter, and excess sealant is led out. In this way, the sealing agent must be hardened while the annular space is completely filled with the sealing agent.
For this reason, it is necessary to hang and place both the tubes above the cover body until they cure. This is because if the tube hangs down below the cover body, the sealing agent will flow out from the tube and the sealing agent in the annular space will be replaced with air, resulting in failure to fill the sealing agent at a certain angle.

[Problems to be solved by the device]

The problem here is until the sealant hardens.
Since the tube must be hoisted and placed, it is not possible to backfill the drill hole, so it takes considerable time to complete the work. The present invention has been made based on the above-mentioned circumstances. Underground laying pipes that enable backfilling of excavation holes and reduction of work time before the sealing agent filled in the cover body is cured. The present invention aims to provide a cover for sealing a tubular body.

[Means for Solving the Problems]

In order to achieve the above-mentioned target, the present invention is as follows: (1) Excavating a hole open to the ground, exposing a portion of a pipe body of an underground pipe to be repaired, and outside the exposed portion of the pipe body. A sealant injection tube for filling the sealant into the annular space formed between the cover body and the tubular body by enclosing the cover body in the inner space and the air for drawing out the excess sealant from the annular space. And the like, the sealing agent is filled into the annular space and solidified to seal the portion to be repaired of the tubular body from the outside. Enclose both tubes in the connection to the cover body,
And a metal tube that can be compressed and deformed to close both tubes, (2) both of the metal tubes are made of copper or a metal similar thereto having high extensibility at room temperature, (3) the above The cover body has a tubular portion that projects outward at the connecting portion with both tubes, and the end portions of the both tubes are folded back at the end portions of the both metal pipes and Located outside, fitted into the tubular part,
A belt wound around the tubular portion is fastened between the both metal tubes and the tubular portion, (4) a contact portion between the inner surfaces of the both metal tubes and the inner tubes, and both The contact part between the outer surface of the metal tube and the folded back tubes is bonded with an adhesive, respectively. (5) The sealing agent injection tube is a bag made of a squeezed tube containing a sealing agent. The sealant is connected and is configured to inject the sealant into the annular space in the cover body by pressing the bag.

[Action]

With the above-described structure, the cover for the pipe body of the underground laying pipe of the present invention encloses both tubes in the connecting portion of the sealant injecting tube and the injecting tube to the cover body, and compresses and deforms to close both tubes. Since a metal tube that can be used is provided, when the sealant is injected and filled into the annular space and then both metal tubes are compressed and deformed, the connecting portion between the sealant injection tube and the extraction tube is closed, and the annular space is Complete and sufficient sealing is performed, and even if earth pressure is directly applied to the annular space from the outside of the cover body when backfilling the excavation hole, the sealing is not broken. Since both metal tubes are made of copper or a metal similar to this, which has great extensibility at room temperature, when an operator uses a tool to compress and deform both metal tubes, the work is easy to complete, and when sealing, There is no risk of damage to both metal tubes. The cover body has a tubular portion that protrudes outward at the connecting portion with both tubes, and the ends of both tubes are folded back at the ends of both metal tubes to the outside of the ends of the metal tubes. It is positioned and fitted to the tubular part, and is fastened between the metal tube and the tubular part by a belt wound around the tubular part, so the joint part between both tubes and the cover body is sufficient. Is strong,
The pressure resistance at the time of injecting the sealant can be improved, and when the both metal tubes are compressed and deformed, the displacement of the both metal tubes with respect to the both tubes is prevented. Since the inner surface of both metal pipes and the inner tubes are in contact with each other, and the outer surface of both metal pipes and the folded back tubes are in contact with each other with an adhesive, respectively. The pressure resistance and airtightness between the metal tube and the joint between the tubes and the cover body are improved. The sealant injection tube is connected to a bag made of a squeezed tube containing the sealant, and by pressing this bag, the sealant is injected into the annular space in the cover body. Filling the sealant into the annular space is achieved by a simple operation of pressing.

【Example】

Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. In the drawings, reference numeral 1 is a cover body, which is used for repairing the reduced diameter pipe joint portion A. The cover body is made of a woven cloth that is coated with a resin to ensure airtightness, and between the binding portion 1a that surrounds the small diameter pipe portion and the binding portion 1b that surrounds the large diameter pipe portion. There is a bulge 1c of a size that surrounds the flange A'of the pipe joint portion A. Cushion sheets 2 and 2'made of foamed resin such as polyurethane are attached to the inner surfaces of the binding portions 1a and 1b in order to bring the cover body 1 into close contact with the small diameter tube B and the large diameter tube C. Non-permeable membrane for airtightness on the inner surface
2a and 2a 'are formed. In addition, an upper overlapping portion 1x to which the cushion sheets 2 and 2'are not adhered is formed on one side edge of the cover body 1, and the other side edge is aligned with end portions. , A sealing piece 3 of which about half is fixed to the cover body 1 is provided. In addition, a sealant injection tube 4 is connected to the cover body 1 at a position close to the seal piece 3,
When the cover body 1 is wound around the reduced diameter pipe fitting portion, the upper overlapping portion 1x aligned with the connecting portion of the tube 4
A tube 5 for drawing out air or the like is connected to the cover body 1 at a position close to. In this embodiment, the tube 4 and 5 are provided with a cylindrical portion 1m which is integrally formed with the cover body 1 and protrudes outward at the connecting portion of the tubes 4 and 5, as shown in FIG. Also, the connecting portions 4a and 5a of the tubes 4 and 5 described above.
Metal tubes 6 and 7 fitted to the tubes 4 and 5 are provided in the vicinity, and the ends of the tube 4 are folded back to cover the outside of the metal tubes 6 and 7, and in this state, the tube It is inserted in the 1 m portion. In this case, the inner surfaces of the metal tubes 6 and 7 and the outer surfaces of the tubes 4 and 5 are adhered with an adhesive 8, and the metal tubes 6 and 7 are also bonded.
The outer surface of the tube and the folded-back portions 4a and 5a of the tubes 4 and 5 are bonded with an adhesive 8. Then, by applying the band 9 to the outside of the cylindrical portion 1m and fastening it, the tubes 4 and 5 are fixed together with the metal tubes 6 and 7 in the cylindrical portion 1m. In this case, the tubular portion 1m and the folded portion 4a of the tubes 4 and 5
It is advisable to bond between 5 and 5a with an adhesive. In this way, the tubes 4 and 5 are tightly and firmly connected to the cover body 1 at their connecting portions. Next, the airtight repair of the underground laying pipe, in this case, the reduced diameter pipe joint portion A using the cover body 1 will be described.
As is well known, a hole D that opens to the ground is excavated to expose the reduced-diameter pipe joint portion A laid underground therefor to be repaired. Then, the cover body 1 is lowered into the hole D, one side of the cover body 1 is passed under the pipe joint portion A and the other side is taken out,
With this pipe pulled up, the pipe joint portion A is located in the center of the cover body 1, and both ends of the cover body 1 are covered with the small diameter pipe B and the large diameter pipe C connected to the pipe joint portion A. In addition, the respective end surfaces of the cushion sheets 2 and 2'are brought into contact with each other, and in this state, the cover body 1 is wrapped around the pipe joint portion A. At this time, apply the adhesive to the seal piece 3 and place it,
The upper overlapping portion 1x is attached to the seal piece 3. Next, the seal piece 3 is folded back at the end of the overlapping portion 1x, and the folded portion of the seal piece 3 is attached to the upper surface of the upper overlapping portion 1x. Then, the bands 10 and 11 are fastened to the outside of the binding portions 1a and 1b of the cover body 1 so that the both ends of the cover body 1 are respectively a small diameter pipe B and a large diameter pipe C
Stick to. In this state, the sealant E is injected under pressure through the tube 4 into the annular space formed between the cover body 1 and the pipe joint portion A. On the other hand, from the tube 5, the air in the annular space is replaced with the sealing agent E and pushed out, and the annular space is filled with the sealing agent E. When the cover body 1 is sufficiently expanded, the excess sealant overflows into the tube 5 up to a predetermined height. When this state is reached, the metal pipes 6 and 7 are sequentially compressed and deformed (squeezed) into a flat shape by using a tool to close the tube 4 and the tube 5. Therefore, not only is the pressure resistance of the closed portion sufficiently obtained, but even if external pressure is applied to the cover body 1, there is no risk that the sealing agent filling the annular space will break through the closed portion and flow out. In this way, after the cover body 1 is filled with the sealant to ensure the airtightness in the pipe joint portion A, the tubes 4 and 5 are left in the hole D and the hole D is immediately backfilled. This operation may be performed before the sealing agent E is hardened. Since the bag 4'is connected to the tube 4 in a state where it is integrally formed as seen in the embodiment, the sealing agent filled therein is annularly pressed by pressing the bag 4 '. It can be pressed into the space. Therefore, the squeezing rod 12 is wound around the end of the sack 4 ′, and while the squeezing rod 12 is wound around the squeezing rod 12, the squeezing rod 12 is squeezed in the same manner as tube squeezing.
The annular space is filled with the sealing agent E from the inside through the tube 4.

[Effects of the Invention] With the above-described configuration, the present invention can achieve the following effects. Since a metal tube which surrounds both tubes and is capable of closing both tubes by compressing and deforming is provided at the connecting portion of the sealant injecting tube and the extracting tube to the cover body, when both metal tubes are compressively deforming. , Since the connecting portion of the sealant injection tube and the lead-out tube is blocked and the annular space is completely and sufficiently sealed, the drill hole can be backfilled before the sealant is hardened. The working time can be greatly reduced. Further, even when earth pressure is directly applied to the annular space from the outside of the cover body when backfilling the excavation hole, the seal is not broken. Since both metal pipes are made of copper or a similar metal that has great extensibility at room temperature, when an operator uses a tool to compress and deform both metal pipes, the work is easy to complete, and when closing, both metal pipes are closed. There is no risk of damage to the metal pipe. The cover body has a tubular portion that protrudes outward at the connecting portion with both tubes, and the ends of both tubes are folded back at the ends of both metal tubes to the outside of the ends of the metal tubes. It is positioned and fits into the tubular part, and is fastened between both metal tubes and the tubular part with a belt wound around the tubular part, so the joint part between both tubes and the cover body is sufficiently It is possible to increase the strength and to improve the pressure resistance at the time of injecting the sealant. Further, when compressing and deforming both metal tubes, it is possible to prevent the displacement of both metal tubes with respect to both tubes. Since the inner surface of both metal tubes and the inner tubes are in contact with each other and the outer surface of both metal tubes and the folded tubes are in contact with each other with adhesive, both tubes and the cover are covered. It is possible to improve pressure resistance and airtightness at the joint with the main body. The sealant injection tube is connected to a bag made of a squeezed tube containing the sealant, and by pressing this bag, the sealant is injected into the annular space in the cover body. Filling the sealant into the annular space can be achieved by a simple operation of pressing. And the repair by the cover can be unitized.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a situation in which the cover of the present invention is adopted for repairing a pipe joint, and FIG. 3 shows a connecting portion between a tube and a cover body. The longitudinal sectional views shown in FIGS. 4A to 4D are vertical side views showing the repair process. DESCRIPTION OF SYMBOLS 1 ... Cover main body, 1a, 1b ... Bundling part, 1c ... Bulging part, 1x ... Upper overlapping part, 1m ... Cylindrical part, 2, 2 '... Cushion sheet, 2a, 2a' ... Non-venting membrane, 3 ... Sealing pieces, 4,5 ... tubes, 4 '... bags, 4a, 5a ... connecting portions, 6,7 ... metal tubes, 8 ... adhesives, 9 ... bands, 10,11 ... bands, 12 ... diaphragms.

Claims (5)

[Scope of utility model registration request] 1. A cover body in which a hole to be opened to the ground is excavated to expose a portion of a pipe body of an underground pipe to be repaired, and a cover body is covered on the outside of the exposed portion of the pipe body. In the annular space formed between the tubular body and the pipe body, connect a sealant injection tube for filling the sealant and a lead-out tube such as air for leading out the internal air and the surplus sealant from the annular space, In the one in which the portion to be repaired of the tubular body is sealed from the outside by filling and solidifying the sealing agent in the annular space, both tubes are connected to the cover body of the sealing agent injecting tube and the extracting tube. Siege,
Also, a cover for sealing a pipe body of an underground laying pipe, which is provided with a metal pipe that can be compressed and deformed to close both tubes. 2. The cover for sealing a pipe body of an underground laying pipe according to claim 1, wherein both of the metal pipes are made of copper or a metal similar thereto having high extensibility at room temperature. 3. The cover body has a tubular portion projecting outward at a connecting portion with both tubes, and ends of the both tubes are folded back at ends of the both metal tubes. It is located outside the end of the metal pipe, is fitted into the tubular portion, and is fastened between the metal pipe and the tubular portion by a belt wound around the tubular portion. The cover for pipe body sealing of an underground laying pipe according to claim 1 or 2. 4. An inner surface of each of the metal tubes and an inner surface of the tubes contacting each other, and an outer surface of each of the metal tubes contacting each other of the folded tubes are bonded with an adhesive. The cover for sealing a pipe body of an underground laying pipe according to claim 1, 2 or 3, wherein 5. The sealing agent injecting tube is connected to a bag made of a squeezed tube containing a sealing agent, and by pressing the bag, the sealing agent is injected into an annular space in the cover body. The cover for sealing a pipe body of an underground laying pipe according to claim 1, 2, 3, or 4, which is configured.