KR20090079304A - Tube for repairing a pipe - Google Patents

Abstract

A tube for pipe repair is provided to offer easy usability and convenience by preventing breakage due to pressure and to offer economical efficiency with a small amount of electricity. A tube(100) for pipe repair includes a nonwoven tube(110), a carbon heater(120), and a high tensile tube(130). The thermosetting resin is dipped to the nonwoven tube. The carbon heater is installed at the nonwoven tube, and solidifies the thermosetting resin by generating the heat. The carbon heater is one of heating textile manufactured with conductive carbon, a heat film, and a heating paint coating layer. The high tensile tube is formed on an inner side of the nonwoven tube, and carbon heater is installed between the nonwoven tube and the high tensile tube.

Description

Tube for repairing a pipe}

The present invention relates to a tube for repairing pipes, which supplies heat uniformly throughout the thermosetting resin to enable uniform curing of the entire tube, shorten the time required for curing, and are easy to manufacture and handle.

In general, a pipe is a pipe for moving rainwater, domestic sewage, and the like, and is a structure that is buried and mounted underground.

When such pipes are buried for a long time and cracked, cracks are generated, which causes cracks in the joints connecting the pipes, and obstructs the flow of sewage due to sedimentation. Excavation of the ground is required to replace the entire pipe. Since the replacement of such a pipe is expensive and time-consuming, a method of repairing the pipe instead of the replacement of the pipe by excavation is mainly developed and used.

Conventional piping repair methods include a pipe repair method using the SET method, and such a SET method involves placing a tube impregnated with a thermosetting resin inside a pipe to be repaired, and then blowing hot hot air into the tube to blow the tube into the sewer pipe inner wall. At the same time, the tube is cured.

However, the SET method, which is a conventional pipe repair method, requires a device such as a boiler, a generator, and a compressor to generate hot air by continuously injecting hot hot air into the tube for a predetermined time to harden the tube. The hot air supplied to is easily cooled and the heat loss is large, and noise is generated greatly in the process of supplying the hot air, and the temperature difference between the side where the hot air is supplied and the side where the hot air is discharged from the tube causes uneven curing of the tube and There was a problem causing an increase in the curing time.

In order to solve this problem, in Korean Patent Registration No. 0719439, "Tube of Piping Repair Equipment", a tube is provided that is provided with a heating wire and a heating element to cure the thermosetting resin.

The tube of the conventional pipe repair apparatus is installed in a nonwoven fabric impregnated with a thermosetting resin, a non-woven fabric, and a heating wire for curing the thermosetting resin by being heated by being supplied with an applied current, and being installed in the nonwoven fabric and in contact with the heating wire to heat. It is configured to include a heating element that cures the thermosetting resin by receiving, the heating element is formed in the form of a metal wire or chip that is installed to cross the heating wire.

As described above, the tubes of the pipe repair apparatus according to the prior art for repairing pipes need a nichrome wire that is directly generated by electricity supply due to the method of using a heating wire, and thus, there is a fear of disconnection of the heating wire during operation and movement. Not only is it high, but heat is not generated due to disconnection of the heating wire, and the heat generated from the heating wire is supplied through a separate heating element, which makes it difficult to supply uniform heat to the entire tube due to the temperature difference between the heating wire and the heating element. There was a problem that the risk of fire is high because heat is generated directly.

In addition, the tube of the conventional plumbing repair device is sensitive to the heat supply area and the curing rate for each delivery site when the thermosetting resin is cured, and additional equipment is required to insert the heating wire and the heating element of the metal mesh into the reinforcing tube. Since the crimping process of the hot wire and the metal mesh in the nonwoven tube is difficult, the tube manufacturing process was difficult.

The present invention supplies heat uniformly throughout the thermosetting resin to enable curing throughout the tube, shorten the time required for curing, and facilitate manufacturing and handling.

The tubing for repairing pipes according to the present invention is a tube for repairing a pipe installed on the inner side of a pipe, wherein the non-woven tube impregnated with a thermosetting resin and the nonwoven tube are installed in the nonwoven tube, and generate radiation heat by supplying power to the thermosetting resin. It includes a carbon heating element for curing.

The present invention is easy to manufacture by forming and processing a variety of forms of the heating element for supplying heat to the thermosetting resin, the carbon heating element generates far-infrared radiation heat by electrical resistance, excellent heat transfer efficiency and uniform curing of the tube It is made quickly, and there is no risk of ignition on the contact surface, so it is safe from the danger of fire, the heating temperature can be freely adjusted, and there is no short circuit or damage of the conductive wires caused by wrinkles, etc. It is easy to transfer heat even in the case of partial cutting and it is economical because it uses less electricity. In the case of the heating fiber, the fabric itself acts as a high-tension jacket to prevent bursting due to pressure when inflated, and it is manufactured by reducing the number of sockets for power supply as compared to a tube having a heating element method of a heating wire and a metal mesh. And the installation has a convenient effect.

In addition, when the power supply is cut off, the existing heating method is a direct heat form, and the residual heat remains in the nichrome wire, and the temperature gradually decreases, whereas the carbon heating element does not retain heat, which is very safe.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a cross-sectional view showing a tube for repairing a pipe according to a first embodiment of the present invention, Figure 2 is a view showing each layer of the tube for repairing a pipe according to a first embodiment of the present invention. As shown, the tubing repair tube 100 according to the present invention includes a non-woven tube 110, the carbon heating element 120 is installed on the non-woven tube (110).

Piping maintenance pipe 100 according to the present invention can be used for water supply pipes as well as sewer pipes buried underground.

Nonwoven fabric 110 is impregnated with a thermosetting resin, made of a tubular shape, the carbon heating element 120 is provided on the inner surface.

The carbon heating element 120 generates heat by external power supply to supply heat to the thermosetting resin of the nonwoven fabric tube 110 so that the thermosetting resin is cured while the nonwoven fabric tube 110 is expanded to be in close contact with the inner surface of the pipe. do.

Carbon heating element 120 is a heat generating fiber made of conductive carbon in this embodiment, for example, as shown in Figure 3, made of carbon or carbon coated carbon fiber yarn 121 and plywood 122 It is manufactured in the form of a woven fabric may be sewn together when the nonwoven tube 110 is manufactured. That is, the soft nonwoven tube 110 and the fabric of the heat generating fibers are sewn to face each other, and at this time, the conductive wire 123 of the heat generating fabric is sewn to be positioned outside the sewing line.

As shown in FIG. 3, the carbon heating element 120 made of a heat generating fiber is provided with conductive wires 123 side by side on both sides and connected to an external power supply unit on each conductive wire 123. The socket 124 is provided.

On the other hand, the high tension tube 130 having a high tension to withstand the pneumatic pressure for expansion, etc. inside the nonwoven fabric 110 may be provided.

The high tension tube 130 forms a double tube together with the nonwoven tube 110, and a carbon heating element 120 is installed between the nonwoven tube 110 and the carbon heating element 120 sewn and fixed to the nonwoven tube 110. ) Or may be fixed by other means. In addition, the film 140 is fixed to the inside of the high tension tube 130 by attachment or other methods to smooth the flow of the fluid moving through the pipe.

4 is a view showing each layer of the piping repair tube according to the second embodiment of the present invention exposed. As shown, the tubing repair tube 200 according to the second embodiment of the present invention, as in the first embodiment, the non-woven tube 210 and the carbon heating element 220 installed in the nonwoven tube 210 It includes, the high-tensile tube 230 and the film 240 (shown in Figure 6) may be installed inside the nonwoven tube 210, the configuration except for the carbon heating element 220 is the same as the first embodiment I will omit the explanation.

The carbon heating element 220 is a heat-generating film made of conductive carbon in this embodiment, and is a film laminated with carbon coated with a thin film of synthetic resin or paper.

The carbon heating element 220 of the heat generating film is bonded to the outer circumferential surface of the high tension tube 230 is inserted into the nonwoven fabric 210 is installed, at this time, the carbon heating element 220 is bonded to the inner surface of the nonwoven fabric 210, etc. It can be fixed by the method.

In addition, when the carbon heating element 220 of the heat generating film is bonded to the high tension tube 230 with an adhesive tape, the conductive wire 221 portion of the carbon heating element 220 is bonded to the outside of the adhesive tape, and the conductive line 221 is attached. The carbon heating elements 220 are installed to form two rows side by side in the longitudinal direction, and each of the conductive lines 221 is provided with a socket 222 for connecting with an external power supply.

FIG. 5 is a view illustrating each layer of a pipe for repairing a pipe according to a third exemplary embodiment of the present invention. FIG. As shown in the drawing, a nonwoven tube 310 and a carbon heating element 320 installed in the nonwoven tube 310 are provided as in the first embodiment, and the high tension tube 330 and the film are disposed inside the nonwoven tube 310. 340 (shown in FIG. 6) may be installed, and components other than the carbon heating element 320 are the same as in the first embodiment, and thus description thereof will be omitted.

The carbon heating element 320 is an exothermic coating layer formed by applying a conductive carbon coating, which is a carbon-based organic polymer compound, in the present embodiment. In this case, the heating paint may be directly applied to the inner surface of the nonwoven fabric 310 to form a heating paint coating layer. Preferably, the conductive wire 321 for supplying power is attached to the outer circumferential surface of the high tension tube 330, and the conductive The exothermic paint is sprayed on the outer circumferential surface of the high tension tube 330 to which the wire 321 is attached to form an exothermic coating layer, and a socket 322 is provided on the conductive wire 321 to be connected to an external power supply.

Referring to the operation of the tubing repair tube according to the present invention having such a configuration as follows.

As shown in FIG. 6, the tubing repair tubes 100, 200 and 300 according to the present invention are installed along the length direction in the pipe 1 to be repaired, and then both ends of the tubes 100, 200 and 300 are sealed with a sealing cover 410 and 420. By supplying a fluid, such as air, from the fluid supply 500 through the connecting tube 510 to any one of the sealing covers 410 and 420, the tubes 100, 200 and 300 are expanded to the inner side of the pipe 1. Make sure they are in close contact.

When the tubes 100, 200, and 300 are in close contact with the inner surface of the pipe 1, the sockets 124, 222, and 322 are connected to the reel wire 600 so that power is supplied from an external power supply unit (not shown), so that the carbon heating elements 120, 220, and 320 are exposed to electrical resistance. The heat generated by the carbon heating elements 120, 220, and 320 may be supplied to the thermosetting resin of the nonwoven fabric tubes 110, 210, and 310.

The carbon heating elements 120, 220, and 320 dissipate heat over the entire area, thereby supplying heat uniformly and quickly to the entire area of the nonwoven tubes 110, 210, and 310, thereby curing not only the entire thermosetting resin impregnated in the nonwoven tubes 110, 210, and 310, but also curing. Shorten the time required for

On the other hand, by connecting the connection unit 520 through the connection pipe 510 from the sealing cover (410,420) by measuring the pressure and temperature inside the tube (100,200,300) by the connection unit 520, through the measured pressure and temperature By adjusting the pressure of the air supplied to the tube (100,200,300) not only to ensure that the tube (100,200,300) is in close contact with the inner surface of the pipe (1), but also to adjust the temperature of the carbon heating elements (120,220,320) to properly adjust the degree of curing of the thermosetting resin Done.

According to the most preferred embodiments of the present invention, the heating element used for curing the thermosetting resin can be processed and molded in various forms as compared to the conventional method using the heating wire, unlike the existing heating wire indirect rather than direct heat By using far-infrared radiant heat, it is not only excellent in heat transfer efficiency to thermosetting resin but also hardening inside and outside of tube at the same time, so it is excellent in curing efficiency and unlike the existing heating wire, it is safe from fire because there is no risk of ignition on the contact surface with heating element.

In addition, as compared with the heat transfer method through the conventional heat transfer body, the heating of the heating fiber, the heating film, and the heating paint coating layer not only enables uniform heat supply throughout the thermosetting resin, but also the temperature required for curing the thermosetting resin. It is possible to reduce the time of arrival, to freely control the heating temperature, and to be economical due to the low electricity consumption.

And, in the case of the heating element of the existing heating wire and the metal mesh, there is a high possibility of short-circuit or cutting due to weak wrinkles or folds, but the heating element according to the present invention does not cause short-circuits such as hot wires or breakage due to wrinkles or folding. It is easy to manufacture and handle, and heat transfer is easy even in the case of partial cutting.

In addition, in the case of the exothermic fiber of carbon, it acts as a high tension jacket to prevent the tube from bursting, and is made of carbon, resin, additives to prevent environmental pollution because it does not contain any toxic substances or environmental hormones.

In addition, in the case of using the heating element of the existing heating wire and the metal mesh, it is inconvenient to connect the electric socket for each heating wire, but in the case of the carbon heating element, only two conductive wires need to be connected.

In addition, the tube of the heating element inserting method of the heating wire and the metal mesh of the existing heating wire required a mechanical device and a process of laminating the heating wire insertion and the heating element of the metal mesh to the tube, but in the case of the heating fiber or the heating film It is easy to manufacture the tube according to the present invention by cutting and inserting and sewing the nonwoven tube, or by applying a coating to the required portion of the exothermic paint, so that a separate machine and an adhesion process are not required.

As described above, specific embodiments have been described in the detailed description of the present invention, but it is obvious that the technology of the present invention can be easily modified by those skilled in the art, and such modified embodiments are defined in the claims of the present invention. It will be included in the technical idea described.

1 is a cross-sectional view showing a tube for repairing pipes according to a first embodiment of the present invention;

2 is a view showing each layer of the piping repair tube according to the first embodiment of the present invention exposed;

3 is a plan view showing a heat generating fiber of the tube for repairing pipes according to the first embodiment of the present invention,

4 is a view showing each layer of the piping repair tube according to the second embodiment of the present invention exposed;

5 is a view showing each layer of the piping repair tube according to a third embodiment of the present invention exposed;

6 is a view showing a state of use of the tube for repairing pipes according to the present invention.

<Description of the code | symbol about the principal part of drawing>

110,210,310: nonwoven tube 120,220,320: carbon heating element

121: carbon fiber yarn 122: plywood

123,221,321: Conductor wires 124,222,322: Socket

130,230,330: High tensile tube 140,240,340: Film

410,420: airtight cover 411,421: inlet

500: fluid supply 510: connection unit

600: reel wire

Claims (3)

In the tube provided on the inner side of the pipe for repairing the pipe, Nonwoven tube impregnated with a thermosetting resin, Carbon heating element which is installed in the non-woven tube, generates heat by supply of power to cure the thermosetting resin Tubing repair tube comprising a. The method of claim 1, The high tension tube is provided inside the nonwoven tube, and the carbon heating element is installed between the nonwoven tube and the nonwoven tube. Plumbing repair tube further comprising. The method according to claim 1 or 2, The carbon heating element, Any one of an exothermic fiber, an exothermic film, and an exothermic coating layer made of conductive carbon Tubing repair tube, characterized in that.

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