KR20060001256A - A end portion sealing apparatus and method in the whole mend of the waterwork pipe - Google Patents

Abstract

According to the present invention, the polyester felt used for the repair of the snap-lock sleeve and the old pipe is completely attached to the old pipe to be repaired, so that resistance to joint breakage or pipe crack in the main pipe part is good, and reliably prevents the occurrence of lifting or cracking. The present invention relates to an end sealing device and method for repairing water pipes that can be prevented.

The present invention is formed in a plate-shaped body of a cylindrical shape, a plurality of engaging pieces are arranged at predetermined intervals in the circumferential direction at one side predetermined position, so that the other side predetermined position can be fastened corresponding to the coupling piece Elastic expansion means having a coupling hole; A tube repair member attached to an outer surface of the elastic expansion means and compressed to an end of the rehabilitation tube that repairs the old tube by elastic extension thereof; And an attachment means for impregnating the pipe maintenance member and attaching between the rehabilitation pipe and the elastic expansion means.

Snap-lock sleeves, maintenance parts, polyethylene nonwoven felt, polypropylene film, epoxy resin

Description

A end portion sealing apparatus and method in the whole mend of the waterwork pipe}             

1 and 2 is a schematic illustration of a tube repair apparatus according to the prior art.

Figure 3 is a schematic cross-sectional view showing the configuration of an embodiment of the end seal device in the overall maintenance of water pipes according to the present invention.

Figure 4 is a perspective view showing the configuration of a snap lock sleeve which is the main part of the present invention.

FIG. 5 is a schematic plan view, front view and side view showing the snap lock sleeve of FIG. 3 unfolded; FIG.

6a to 6c is a construction procedure of the whole water pipe repair method according to the present invention.

Figure 7 is another example for extending the snap-lock sleeve that is the main part of the present invention, the operation state using the tube stopper.

* Explanation of the codes for the main parts of the drawings

1: snap lock sleeve 2: coupling piece

3: tube repair member 4: epoxy resin

11: Old Officer 12: Packer

13: conservative

The present invention relates to an apparatus and method for maintaining the airtightness of pipe ends in the overall repair of water pipes for repairing damages such as cracks, leaks, etc. of various water pipes used for drinking water, in particular the old pipe and rehabilitation pipe The present invention relates to an apparatus and a method for end sealing in total repair of a water supply pipe which can reliably prevent lifting of the old pipe and the repair pipe by reinforcing the rehabilitation pipe end to the old pipe reliably in the finishing process after repair.

In general, the water supply pipe used for the transfer of drinking water buried in the ground mainly consists of cast iron pipe. If this cast iron pipe is gradually aged over time, it will not only contaminate drinking water by producing iron oxide (rust) due to corrosion, but also act as a cause of cracking or breakage of the cast iron pipe, causing a huge amount of water to leak into the ground. It is urgently required to repair or replace with new water pipe. According to the Ministry of Environment (2002), 14.8% of tap water produced due to aging disappears due to leakage.

In the renovation and renovation of old water pipes buried in the ground, the traditional method of replacing or repairing a new pipe after excavating the ground, and various problems caused by the ground excavation, that is, soil erosion after the ground excavation work However, a non-excavation method for repairing a water supply line without dismantling the road has been used in a manner to solve the problem of waste disposal and congestion in a congested area.

The non-excavation method includes a method of removing impurities such as corrosives and scales in an old water pipe, injecting a chemical into the crack of the water pipe, and repairing it, inserting a tubular polyethylene liner by reversing it, and inserting hot steam and compressed air. The method of inflating and lining was used. However, the repairing method using chemicals can partially repair the entire crack of the pipeline, but it cannot repair the entire corroded interior or the whole of the hole with a large hole. Therefore, the current situation relies heavily on the repair method using the inverted tube.

In the lining repair method using the inverted tube, there was a problem to be solved. That is, the branch pipe should be connected and installed after closely attaching or attaching the old pipe to the repair pipe. In this case, when the branch pipe connection location is drilled for the connection of the repair pipe and the branch pipe, Adhesion or adhesion between the old pipes is lowered, there is a problem that the lifting of the repair pipe is generated. As a result, water is permeated between the close pores by the lifting, and the flow rate in the conduit is lowered due to the wrinkles caused by the contraction.

In order to solve this problem, conventionally, as shown in Figure 1, by repairing the connection portion of the main maintenance pipe 101 and the branch pipe 102 by using a hot melt (103) hot melt adhesive (103) Maintain watertight between the pipe 101 and the branch pipe 102, or end-ring 110 around the perforations of the branch pipe 102 of the main repair pipe 101 as shown in FIG. Alternatively, the water-retaining pipe is pressed against the old pipe by the elastic pressing force using a snap-lock sleeve to maintain watertightness.

However, in the former hot melt adhesive method, there is a problem in that the adhesive detaches with time. The latter type of end ring or snap-lock sleeve uses the elastic force to extend the ring, so that the water pipe adheres closely to the old pipe, so that water is more likely to penetrate into the air gap between the water pipe and the water pipe than the attachment method. There is a problem that requires construction.

On the other hand, in the overall repair of pipelines using a non-excavation method, conventionally, "Utility Model Registration No. 0313869" Drainage non-excavation repair fitting ", Utility Model Registration No. 0313867," Pipe repair member ", Utility Model Registration No. 0334790 "Pipe repair members for the unexcavated filling index total repair method", etc. have been proposed.

The utility model registration No. 0313869 "Sewage pipe non-excavation repair fitting" is to wrap the snap lock sleeve and FRP-type sleeve outside the fitting, and then placed in the repair point of the pipe, and then expand the compressed air by expanding the snap lock sleeve It is a method to make the FRP sleeve close to the old pipe.

In this method, since the FRP sleeve is placed in close contact with the old pipe rather than attached, when the compressibility decreases due to external factors such as the expansion force of the snap lock sleeve is reduced, a gap may occur between the FRP sleeve and the old pipe. In addition, there is a high risk that the lifting occurs over time, it is difficult to maintain confidentiality. In addition, the above structure has a problem that can not be applied to the water conduit due to the material properties of the FRP sleeve.

In addition, the prior art discloses a "tube repair member" of Utility Model Registration No. 0313867 and a "tube repair member for the non-excavation filling index total repair method" of Utility Model Registration No. 0334790. These techniques are a process of inserting a snaplock sleeve into a conduit, expanding with a packer, and then filling it with a liquid or gel repair hardener to repair. This method has the advantage of easy repair due to the use of water-based system. On the other hand, there is a risk of cracking when the branch pipe is connected through the water-repairing part, and when the water-induced water effect is inferior, there is a problem of rebuilding. .

Accordingly, the present invention has been proposed to solve the above problems, by completely reinforcing the end attachment section of the old pipe and rehabilitation pipe by completely attaching the polyester felt used for the repair of the snap lock sleeve and the old pipe to the old pipe. It is an object of the present invention to provide an end sealing device and a method for repairing water pipes in the whole of the water pipe, which have good resistance to joint breakage or crack of the main pipe, and can reliably prevent the occurrence of lifting or gaps.

In addition, the present invention is made of an expandable structure, which can be applied to water pipes of various standards, and the thickness of polyester felt, which is a repair material, can be made thin, so that there is almost no shrinkage of the tube and there is no change in the pipe after repair. Another object is to provide an end seal and a method in the overall repair of a tube.

In order to achieve the above object, the present invention is formed of a plate-shaped body rolled into a cylindrical shape, a plurality of engaging pieces are arranged at predetermined intervals in the circumferential direction at one side predetermined position, the other side predetermined position Elastic expansion means formed with coupling holes to be fastened correspondingly; A tube repair member attached to an outer surface of the elastic expansion means and compressed to an end of the rehabilitation tube that repairs the old tube by elastic extension thereof; And an attachment means for impregnating the pipe maintenance member and attaching the rehabilitation pipe and the elastic expansion means.

In addition, the present invention, the coupling piece protrudes in the circumferential direction on one side, the hole is formed in a position corresponding to the coupling piece on the other side by attaching a polyester nonwoven felt felt to the plate-shaped body in the form of a roll through the adhesive media A first step of manufacturing a male member; A second step of wrapping the tube repair member in an expansion member; A third step of grinding the polypropylene film coated on the outer surface of the polyester nonwoven felt of the tubular repair member; A fourth step of impregnating the adhesive resin on the outer surface of the polyester nonwoven felt felt on which the polypropylene film is ground; A fifth step of positioning the expansion member at the end of the rehabilitation pipe that has repaired the old pipe, and then expanding the diameter of the snap lock sleeve to squeeze the end of the reinforcement pipe by the polyester nonwoven felt; And a sixth step of fixing the adhesive resin of the polyester felt installed on the outer surface of the snap lock sleeve to the inner surface of the rehabilitation pipe.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 3 to 7.

The end gas tightness device and method in the overall repair of the water supply pipe according to the present invention reinforce the attachment part of the old pipe and the rehabilitation pipe at the end of the pipe after the overall repair between the old pipe and the rehabilitation pipe to maintain the airtightness reliably, even when forming the branch hole. It is implemented to prevent lifting.

In the embodiment of the present invention, as shown in Figures 3 to 5 is formed of a plate-like body rolled in a cylindrical shape, a plurality of engaging pieces 2 are arranged at predetermined intervals in the circumferential direction at one side predetermined position A snap lock sleeve (1) formed at the other side at a predetermined position such that a coupling hole (1a) is formed to be fastened corresponding to the coupling piece (2); A maintenance member (3) attached to an outer surface of the snap lock sleeve (1) and compressed to the old rehabilitation pipe (13) by elastic extension thereof; It is impregnated in the water-retaining member (3), and comprises a thermosetting epoxy resin (4) for attaching between the aged rehabilitation pipe 13 and the snap lock sleeve (1).

In the present embodiment, the snap lock sleeve 1 forms a bent portion 1b whose circumferential ends thereof are bent outward so that when the snap lock sleeve 1 is expanded, the snap lock sleeve 13 is compressed in the old rehabilitation pipe 13. It provides the flexibility to give more elastic force.

Further, the engaging piece 2 of the snap lock sleeve 1 has a hook shape positioned to protrude in the direction of being cut and rolled. Therefore, in the state where the snap lock sleeve 1 is wound in a roll form, when the snap lock sleeve 1 is expanded, the hook piece passes over the hole 1 a without difficulty, whereas the opposite side, that is, when it contracts, Since the hook piece is caught in the hole 1a, it is prevented from contracting any more. Therefore, the snap lock sleeve 1 is to be able to prevent deformation or deterioration of the expansion force.

The maintenance member 3 is made of a polyester nonwoven felt on one side, the other side is made of a member coated with a polypropylene film.

The construction method of the present invention configured as described above will be described with reference to Figs. 6A to 6C.

First, looking at a series of processes according to the overall repair of the old pipe 104, to explore the cracks inside the old pipe, lining the inner pipe of the old pipe to remove the rust and clean, then dried. Then, the rehabilitation pipe is inverted and inserted into the old pipe to perform total repair. When the renovation of the old pipe 104 is completed, the airtight process is performed around the regeneration pipe end and the branch hole.

In the airtight process, as shown in FIG. 6A, the coupling piece 2 protrudes in the circumferential direction on one side, and the hole 1a is formed in a position corresponding to the coupling piece 2 on the other side in a roll shape. A tubular repair member (3) is made by attaching a tubular repair member (3) made of polyester nonwoven felt to the snap lock sleeve (1) of the plate-shaped member by means of an adhesive resin.

Then, after wrapping the snap lock sleeve (1) coupled to the tube repair member (3) in the packer 12, the polypropylene film coated on the outer surface of the tube repair member (3) is ground. After the polypropylene film is ground and removed, the exposed polyester felt outer surface is impregnated with a thermosetting epoxy resin.

The packer 11 in which the snap lock sleeve 1 is wound is placed at the end position of the rehabilitation pipe 13 which repaired the old pipe 104.

When the compressed air is injected into the packer 11 and the snap lock sleeve 1 in a roll form is expanded by gradual expansion, the coupling piece 2 passes over the hole 1a, but in the expanded state as much as possible. The coupling piece (2) is caught by the hole (1a) is fastened to be pressed, and then pressurized, after which the epoxy resin impregnated in the water-retaining member (3) is gradually cured and completely attached to the old rehabilitation pipe (13) Done.

After the construction is completed as described above, in the case of forming a branch hole for connecting the branch pipe, even if the renovated old pipe 13 is drilled, the perforated portions of the regenerated pipe 13 and the old pipe 11 are made of polyester nonwoven felt Since it is firmly attached by, the maintenance work for confidentiality is unnecessary.

In the present invention, an example of using a packer that expands by air injection for a structure for expanding a snaplock sleeve, which is a main part, is not limited thereto. As illustrated in FIG. 7, a snaplock sleeve extension made of solid rubber is illustrated. The member 20 can also be used.

The snap-lock sleeve expansion member 20 has a plurality of studs installed in the central portion in the axial direction through the hole rubber plug 21, and axially penetrating in the circumferential direction of the side of the barrel rubber plug 21. It consists of a crimping nut 23 fastened to the bolt 22 and each stud bolt 22. Referring to the working state of this structure, first, the snap lock sleeve (1) is wound around the rubber stopper 21, and then placed in the end of the reinforcement pipe 13, the pressing nut fastened to the stud bolt 22 Tighten (23) to the same pressure using a hydraulic clamping tool. Accordingly, the gong rubber stopper 21 is extended in the radial direction by the fastening pressure of the stud bolt 21 and the pressing nut 23 to expand the snap lock sleeve 1, the snap lock sleeve 1 is rehabilitation By expanding as much as possible from the inner surface of the tube to more firmly press and fix the state attached to the old pipe 11 and rehabilitation pipe 13, thereby preventing the lifting of the old pipe 11 and rehabilitation pipe (13).

On the other hand, in another embodiment of the present invention, when the tube repair member 3 is reattached to a predetermined section of the end of the old pipe 11 and the rehabilitation pipe attached, the tube repair impregnated with the epoxy resin by a reverse method The member 3 is attached to the end of the aged rehabilitation tube 13, the polypropylene film coated on the inner diameter of the tube repair member 3 is ground so that the polyester nonwoven felt is exposed to the outside, and then packer or barrel After placing the snap lock sleeve 1 wrapped on the outside of the rubber in the ground portion, the packer is expanded or the snap lock sleeve 1 is expanded by the axial compression of the rubber to end the regeneration tube 13. It can also be pressurized and installed so that the maintenance member (3) attached to the more firmly attached.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, according to the present invention, the polyester felt is impregnated with a thermosetting resin, and then installed at the end of the rehabilitation pipe by using an expandable snap lock sleeve, thereby lifting or cracking the end of the rehabilitation pipe that completely repairs the old pipe of the water supply main pipe. There is an effect that can prevent the occurrence of reliably.

In addition, it can be applied to water pipes of various standards, there is almost no reduction in diameter, and there is another effect that the construction is easy.

Claims (10)

It is formed of a plate-shaped body rolled in a cylindrical shape, a plurality of coupling pieces are arranged at predetermined intervals in the circumferential direction at one side predetermined position, the coupling hole is formed to be fastened corresponding to the coupling piece at the other predetermined position Elastic expansion means; A tube repair member attached to an outer surface of the elastic expansion means and compressed to an end of the rehabilitation tube that repairs the old tube by elastic extension thereof; And Attachment means impregnated in the pipe maintenance member, and attached between the rehabilitation pipe and the elastic expansion means End airtight device in the water pipe total repair including a. The method of claim 1, And said elastic expansion means is bent outwardly at both ends thereof in the circumferential direction. The method of claim 1, End sealing device in the overall maintenance of the water supply pipe, characterized in that the engaging piece of the elastic expansion means is positioned to protrude in the direction to be cut and rolled. The method of claim 1, The maintenance fitting is one end of the polyester nonwoven felt felt, the other side is the end sealing device in the overall repair of water pipes, characterized in that the other side is coated with a polypropylene film. The method of claim 1, End sealing device in the overall maintenance of water pipes, characterized in that the attachment means made of a thermosetting epoxy resin. The joining piece protrudes in the circumferential direction on one side, and a hole is formed in a position corresponding to the joining piece on the other side, and the polyester nonwoven fabric felt is attached to the plate-shaped body in roll shape by means of an adhesive to produce a maintenance member. First step; A second step of wrapping the tube repair member in an expansion member; A third step of grinding the polypropylene film coated on the outer surface of the polyester nonwoven felt of the tubular repair member; A fourth step of impregnating the adhesive resin on the outer surface of the polyester nonwoven felt felt on which the polypropylene film is ground; A fifth step of positioning the expansion member at the end of the rehabilitation pipe that has repaired the old pipe, and then expanding the diameter of the snap lock sleeve to squeeze the end of the reinforcement pipe by the polyester nonwoven felt; And A sixth step of fixing the adhesive resin of the polyester felt installed on the outer diameter of the snap lock sleeve to the inner surface of the rehabilitation pipe End airtight method in the water pipe total repair including a. The method of claim 6, In the fifth step, the expansion member is made of a packer, wherein the fifth step is injecting compressed air into the packer, and expanding the plate-shaped sleeve in the form of a roll by swelling. End sealing method. The method of claim 6, In the fifth step, the expansion member is composed of a rubber stopper, a plurality of stud bolts installed in the axial direction in the circumferential direction of the side of the rubber stopper, and a pressing nut fastened to each stud bolt. After the snap lock sleeve is wound on the outer surface of the expansion member, by using a hydraulic fastening tool to tighten the pressing nut at the same pressure by expanding the rubber stopper characterized in that the diameter of the snap lock sleeve made to extend End sealing method for the overall repair of water pipes. A first step in which one surface is made of a polyester nonwoven fabric felt, and the other surface is impregnated with an epoxy resin in a pipe repair member coated with a polypropylene film, and then the old pipe is attached to an end of the rehabilitation pipe which has been reinforced; A second step of grinding the polypropylene film of the tubular repair member to expose the polyethylene nonwoven felt to the outside; A third step of protruding the engaging piece in a circumferential direction on one side thereof, and installing a plate-shaped sleeve having a roll shape on an outer surface of the expansion member by forming a hole at a position corresponding to the engaging piece on the other side; A fourth step of positioning the expansion member at the end of the rehabilitation pipe to which the maintenance member is attached after performing the third step, and expanding the expansion member to compress the maintenance member to the rehabilitation pipe; And A fifth step in which the snap lock sleeve, the pipe maintenance member, and the reinforcement pipe are integrally fixed through the epoxy resin; End airtight method in the water pipe total repair including a. The method of claim 9, The first step is an airtight end sealing method of the overall water supply pipe, characterized in that for attaching the pipe maintenance member to the end of the rehabilitation pipe reinforcement of the old pipe in a reversal manner.

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