KR101293636B1 - Method of rubber lining for pipe - Google Patents

Abstract

PURPOSE: A method for lining the inside of a rubber pipe is provided to prevent a part of the rubber plate from delaminating caused by losing adhesive by obtaining a uniform thickness of the adhesive positioned between the rubber plate and the pipe. CONSTITUTION: A method for lining the inside of a rubber pipe comprises the steps of: leveling surfaces (S100); cutting a rubber plate (S200); spreading adhesive (S300); attaching the rubber plate (S400); removing an air tube (S500); and processing by heat (S600). The step of spreading the adhesive includes a first process, a first drying process, an intermediate process, a second drying process, a prime process, and a third drying process. The second drying process dries the pipe which is processed in the intermediate process at room temperature for 4-5 hours. The third drying process dries the pipe which is processed in the prime process at room temperature for 11-13 hours. [Reference numerals] (S100) Step of leveling surfaces; (S200) Step of cutting a rubber plate; (S300) Step of spreading adhesive; (S400) Step of attaching the rubber plate; (S500) Step of removing an air tube; (S600) Step of processing by heat

Description

Rubber lining method inside the pipe {Method of rubber lining for pipe}

The present invention relates to a rubber lining method inside a pipe for rubber lining inside an industrial special pipe requiring rustproofing and chemical resistance, wherein an adhesive is applied to an inner surface of a pipe from which rust or foreign matter is removed, and an applied adhesive At the same time, the cut rubber plate attached to the inside of the pipe is also coated with an adhesive on one side, and then dried under a certain condition. The present invention relates to a rubber lining method inside a pipe to continuously strengthen the adhesion between the inner surface of a pipe and a rubber plate by using the same.

Metal pipes are used for industrial oil pipes for transporting oil, special chemicals, special liquid materials such as acids, alkalis or highly corrosive liquids, or transport pipes for transporting mixed solids such as coal with water. Synthetic rubber was attached to the inner surface of the resin. As a result, the rust resistance and chemical resistance of the pipe are improved to extend the life of the pipe, and to realize the effect of improving productivity and reducing labor costs.

In addition, the rubber lining method in the conventional pipe is mainly used the following method.

In other words, when the inner diameter of the pipe is large enough for a person to enter it, the person directly enters the inside of the pipe, and then the adhesive is applied to the inner surface of the pipe, which is generally made of metal, and the upper portion of the adhesive is made of synthetic resin. Or by attaching a rubber sheet; If the inner diameter of the pipe is small enough for human beings to enter it, apply an adhesive to the inner surface of the pipe using a roller, a brush or a spray nozzle, and apply a synthetic rubber sheet on the upper side of the pipe in the longitudinal direction of the pipe. After being pushed in and drawn in, high pressure air was injected into the pipe to attach a rubber plate to the inner surface of the pipe.

The following is a representative prior art relating to the rubber lining method inside the pipe.

Domestic registered utility model No. 20-0404768 relates to abrasion resistant ceramic pipe, which is melted rubber or raw rubber on one side of the ceramic tiles arranged in succession or vulcanized and then rolled in a circle so that the ceramic tiles form an inner diameter. It relates to a wear-resistant ceramic pipe in which a rubber circular pipe having a projection line portion is fitted in an outer diameter thereof and the outer surface is attached thereto.

The prior art extends the use and replacement period by increasing wear resistance to prevent abrasion, etc. generated on the inner diameter surface when transferring the granular soils, which are raw materials used in steelmaking, cement plants, smelters, and thermal power plants. Although there is an effect that can be made, the manufacturing method according to the complex configuration occurs a difficult problem, the situation that requires continuous research and development to solve this problem.

The present invention has been made to improve the problems according to the prior art of the rubber lining method inside the pipe, the rubber lining method of the conventional pipe inside the rubber inside the pipe when the pipe inner diameter is small enough to enter the human Since the lining method generally makes it possible to easily insert the rubber sheet in a round state into the pipe by using a low viscosity adhesive, the adhesive applied to the inner surface of the pipe is lost by the rubber sheet introduced into the pipe. A problem has arisen that it is difficult to ensure a uniform coating thickness; This caused a problem that the rubber plate attached as the rubber lining material easily fell off the inner surface of the pipe; Although the high pressure inside the pipe must be maintained continuously until the adhesive is hardened even when the rubber plate is injected with high pressure air into the pipe where the rubber plate is inserted into the pipe, the high pressure holding time is required to improve productivity. The main purpose is to provide a solution to the problem that the rubber sheet is not firmly attached to the inner surface of the pipe or that the adhesive force is deteriorated due to the high pressure air injected into the air between the rubber sheet and the inner surface of the pipe. It is.

The present invention has been made to solve the above-

Surface smoothing step of removing rust or foreign matter on the inner surface of the pipe; Rubber plate cutting step of cutting a rubber plate having an area corresponding to the inner surface of the pipe; An adhesive applying step of applying and drying the adhesive in a plurality of layers on the inner surface of the pipe subjected to the surface smoothing step, and applying the adhesive to one side of the rubber plate subjected to the rubber plate cutting step; The rubber plate treated with the adhesive coating step is wound on an air tube having a diameter corresponding to the inner diameter of the pipe so that the adhesive coated surface faces outwards, the rubber plate is bonded to overlap the joints at both ends of the rubber plate, and the air tube wound on the outer surface is wound inside the pipe. A rubber plate attaching step of injecting air into the air tube and then bonding one side of the rubber plate coated with the adhesive to the inner surface of the pipe coated with the adhesive; An air tube removing step of removing an air tube located inside the pipe treated with the rubber plate attaching step; It proposes a rubber lining method inside the pipe comprising a; heat treatment step of vulcanizing the pipe treated air removing step.

The rubber lining method of the inside of the pipe according to the present invention as described above, by drying the adhesive applied to the inner surface of the pipe and one side of the rubber plate in a certain condition, because the rubber sheet is introduced into the pipe in a state where the adhesive is hardened to some extent It is possible to obtain an effect of preventing a part of the adhesive located between the inner surface of the pipe and the rubber plate from being lost by the rubber plate introduced into the pipe; Thereby, the thickness of the adhesive positioned between the rubber sheet and the pipe can be ensured uniformly, and the effect of preventing partial peeling of the rubber sheet due to the loss of the adhesive can be obtained; While the adhesive is cured, the air tube continuously applies a constant pressure from the rubber plate toward the inner surface of the pipe, so that the rubber sheet can be cured while the pipe is pressed against the inner surface.

1 is a block diagram showing the procedure of the rubber lining method inside the pipe according to a preferred embodiment of the present invention.
Figure 2 is a block diagram showing the main process sequence of the rubber lining method inside the pipe according to a preferred embodiment of the present invention.
Figure 3 is a partial cross-sectional perspective view showing a pipe manufactured by a rubber lining method inside the pipe according to a preferred embodiment of the present invention.
Figure 4 (a) to (b) is a partial cross-sectional view showing a pipe manufactured by a rubber lining method inside the pipe according to a preferred embodiment of the present invention.

The present invention relates to a rubber lining method inside a pipe for rubber lining inside an industrial special pipe requiring rustproofing and chemical resistance, and selecting a surface for removing rust or foreign matter from the inner surface of the pipe 10 (S100). Wow; Rubber plate cutting step (S200) for cutting the rubber plate 20 having an area corresponding to the inner surface of the pipe (10); Applying and drying the adhesive in a plurality of layers on the inner surface of the pipe 10 subjected to the surface smoothing step (S100), and applying the adhesive 60 to one side of the rubber plate 20 subjected to the rubber plate cutting step (S200). Adhesive application step (S300); The adhesive plate (S300) is wound around the rubber plate 20, the adhesive coating surface is wound to the outside in an air tube having a diameter corresponding to the inner diameter of the pipe 10, the joint portion 70 at both ends of the rubber plate 20 After binding to overlap, the air tube wound on the outer surface of the rubber plate 20 is introduced into the pipe 10 in the longitudinal direction, and then injected into the air tube of the rubber plate 20 coated with the adhesive 60 Rubber plate attachment step (S400) for bonding the side and the inner surface of the pipe 10, the adhesive is applied; An air tube removing step (S500) of removing an air tube located inside the pipe 10 in which the rubber plate attaching step (S400) is processed; The air tube removing step (S500) relates to a rubber lining method inside the pipe comprising a; heat treatment step (S600) for vulcanizing the treated pipe (10).

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 4 showing preferred embodiments of the present invention.

Specifically, the surface leveling step (S100) is a treatment step for removing rust or foreign matter on the inner surface of the pipe 10, which is introduced into the pipe 10 to remove rust or foreign matter attached to the inner surface. Any method may be used, but a sanding grinder having a length corresponding to the pipe 10 and mounted on a guide bar that can be inserted into the pipe 10 can be rotated about the longitudinal direction of the guide bar. It is preferable to process by.

In addition, since the inner surface of the pipe 10 treated by the surface smoothing step S100 is removed rust or foreign matter, the applied adhesive can be securely attached.

In addition, the rubber plate cutting step (S200) is a processing step of cutting the rubber plate 20 having an area corresponding to the inner surface of the pipe 10, and a butyl-based rubber material or EPDM, known as a material having antirust and chemical resistance. Ethylene Prophlene Diene Monomer) A rubber plate 20 made of rubber is cut at the inner circumference of the inner surface of the pipe 10.

At this time, if the width (length corresponding to the inner circumference of the pipe 10) of the cut rubber plate 20 is shorter than the inner circumference of the pipe 10, a portion where the rubber plate 20 is not attached to the inner surface of the pipe 10 is formed. The self-explanatory length should be longer than the inner circumference of the pipe 10, and more preferably, the joints 70 at both ends in the width direction of the rubber plate 20 attached to the inside of the pipe 10 are fixed to each other as shown in FIG. It is preferable that it is comprised so that area may overlap.

That is, if the width of the cut rubber plate 20 exactly matches the inner circumference of the pipe 10, the aesthetics inside the pipe 10 may be beautiful, but the gas, liquid or the like flowing into the pipe 10 may be obtained. Since a flowable material such as a flowable solid may continuously damage between both ends in the width direction of the rubber plate 20, the rubber plate 20 attached by the adhesive may easily fall, so that the width of the rubber plate 20 may be reduced. It is preferable to be cut to a length longer than the inner periphery of (10) and attached to the inner surface of the pipe 10 by an adhesive while overlapping a predetermined area with each other.

In connection with the above, it will be apparent that the processing order of the surface leveling step S100 and the rubber plate cutting step S200 can be freely determined according to the judgment of the operator.

In addition, the adhesive coating step (S300) is to apply and dry the adhesive in a plurality of layers on the inner surface of the pipe 10 treated with the surface leveling step (S100), rubber plate cutting step (S200) one side of the rubber plate 20 treated As a treatment step of applying the adhesive 60 to the adhesive, the inner surface of the pipe 10 and the one side of the rubber plate 20 with each other, but the general pipe 10 and a rubber material composed of a metal material It is a treatment step for improving the adhesive force between the rubber plate (20).

That is, the adhesive applied to the inner surface of the pipe 10 is dried and constitutes a plurality of layers formed by being applied a plurality of times and dried a plurality of times, and the adhesive applied directly to the inner surface of the pipe 10 has excellent adhesion to metal. Another adhesive applied to the inner surface of the pipe 10 and applied to the upper surface of the dried adhesive using the one having the characteristics is applied to one side of the rubber plate 20 and the adhesive applied directly to the inner surface of the pipe 10. It is desirable to use those having chemical properties that can lead to firm adhesion with the applied adhesive.

In addition, a plurality of layers of adhesive applied to the inner surface of the pipe 10 is preferably treated to dry completely after the lower adhesive layer is applied, but before another adhesive layer is applied to the top, which is inside the pipe 10 This is to realize good adhesion between the cotton and the adhesive or the lower adhesive and the upper adhesive.

In addition, the adhesive 60 applied to one side of the rubber plate cutting step (S200) treated rubber plate 20 is a rubber plate (using an adhesive 60 having a chemical property similar to that of the rubber plate 20 of the material used in the present invention) It is preferable to induce excellent adhesion between the adhesive layer 20 and the adhesive 60, and the adhesive 60 applied to one side of the rubber plate 20 is applied to the uppermost layer of the multiple layers of adhesive applied to the inner surface of the pipe 10. It is desirable to use those that can be strongly bonded to each other.

In connection with the above, a plurality of layers of the adhesive applied to the inner surface of the pipe 10 according to the present invention has a state of being dried after being applied, the adhesive 60 applied to one side of the rubber plate 20 It is desirable to keep dry or only the surface dry.

That is, generally, the metal material and the rubber material have different physical and chemical properties, and thus are difficult to adhere to each other. The present invention is a plurality of adhesive layers applied to the inner surface of the pipe 10 to change the components of the adhesive a plurality of times. Strong adhesion between the metal pipe 10 and the rubber plate 20 made of rubber is realized.

In addition, the present invention is configured so that the adhesive applied to the inner surface of the pipe 10 remains completely dried and the adhesive 60 applied to one side of the rubber plate 20 remains undried or only the surface dried. Thus, when the rubber plate 20 is introduced into the inner surface of the pipe 10 in the rubber plate attachment step (S400), the loss and non-uniformity of the adhesive 60 is minimized.

Specifically, the adhesive is applied to the inner surface of the pipe 10 or the inner surface of the pipe 10 and one side of the rubber plate 20 by a general rubber lining method inside the pipe 10, and the rubber sheet into the pipe 10. When the 20 is drawn in, the liquid adhesive having a predetermined thickness and applied viscosity is pushed in the direction of the rubber plate 20 drawing by the input of the rubber plate 20, and the pushed adhesive moves to one end of the pipe 10. Spilled out and lost, there is a problem that the coating thickness of the adhesive is non-uniform due to the lost adhesive.

On the contrary, in the present invention, the adhesive layer having a predetermined thickness applied to the inner surface of the pipe 10 maintains a state in which the lower adhesive layer is firmly adhered to the inner surface of the metal pipe 10, and the upper adhesive layer is While realizing the effect of maintaining the state to be firmly adhered to the adhesive layer applied to the rubber plate 20, while having a dried state is flowed when the rubber plate 20 is drawn into the pipe 10 The effect is not lost.

In addition, since the adhesive 60 applied to one side of the rubber plate 20 allows the thickness of the entire adhesive having a viscous liquid state to be significantly thinner than that of the prior art, the rubber plate 20 for the inside of the pipe 10 is provided. The effect of allowing the adhesive (the entire adhesive between the inner surface of the pipe 10 and the rubber plate 20) to be minimally flowed at the time of introduction of the adhesive material is realized, and the adhesive 60 applied to one side of the rubber plate 20 is If only the surface has a dried state, the adhesive 60 flows less when the rubber sheet 20 is drawn into the pipe 10, thereby reducing the pulling resistance due to the viscosity of the adhesive.

In connection with the above, one side of the rubber plate 20 to which the adhesive 60 is applied in the adhesive application step (S300) is the adhesive 60 applied to the worker or surroundings before the following rubber plate attachment step (S400) is processed. In order to prevent the sticking, a film or sheet of synthetic resin material that can be easily released from the adhesive 60 may be temporarily attached.

In addition, the present invention is the inner surface of the pipe 10, the surface of the first coating 30 (S100) treated with an isocyanate-based adhesive and xylene solvent to the inner surface of the pipe 10 of the adhesive coating step (S300). An initial process of applying; A first drying process of drying the pipe 10 treated with the initial process at room temperature (15-25 ° C.) for 4-8 hours; Applying an intermediate (40) mixed with a chloroprene-based adhesive and a xylene solvent to an upper surface of the initial agent (30) in the pipe (10) subjected to the primary drying process; A secondary drying process of drying the pipe 10 subjected to the intermediate process at room temperature for 4 to 5 hours; Top coat 50 coated with an adhesive of any one of butyl rubber bond, EPDM bond or NR bond and toluene solvent to the upper surface of the middle agent 40 in the pipe 10 subjected to the secondary drying process Process; A third drying process of drying the pipe 10, which has been subjected to the top coat process, at room temperature for 11 to 13 hours; may be treated to include an adhesive on the inner surface of the pipe 10 more preferably.

Specifically, the initial process is a process of applying the first agent 30, which is an adhesive having a property of being firmly bonded to the metal material on the pipe 10 of the metal material, the adhesive agent of the metal and rubber generally used Although it can be used as (30), it is preferable to use the thing which mixed the isocyanate type adhesive agent which is excellent in adhesive force with a metal in xylene solvent, The commercial product which mixed the chemlok-6108 and xylene solvent as a commercial product (30). It is preferable to use.

In addition, the mixing ratio between the isocyanate-based adhesive and the xylene solvent may be configured at an appropriate ratio as the coating method of the initial process uses any one of a roller, a brush, or a spray nozzle.

In addition, the first drying process is a process of drying the supernatant 30 by maintaining the pipe 10 subjected to the initial process at room temperature (15-25 ° C.) for 4-8 hours, when the drying temperature is less than 15 ° C. When the time exceeds 8 hours, the problem of productivity decreases, and when the temperature exceeds 25 ° C., the drying time is controlled to less than 4 hours, but the isocyanate-based adhesive deteriorates, thereby deteriorating physical properties. It is preferable to be dried.

In addition, the intermediate process is applied to the inner surface of the pipe 10 by the initial process and the intermediate to ensure excellent adhesion between the supernatant 30 dried by the primary drying process and the top coat 50 of the following process The process of applying the middle agent 40 to the upper surface of the supernatant 30 in the pipe 10 subjected to the primary drying process, the middle agent 40 is an isocyanate-based adhesive and a top coating agent (30) Any adhesive may be used as long as it is an adhesive capable of firmly adhering any one of (50) butyl rubber bond, EPDM bond or NR bond, but it is preferable to use a mixture of chloroprene-based adhesive and xylene solvent. As a commercial product of the intermediate agent 40, it is preferable to use the intermediate agent 40 which mixed the chemlok-205 and the xylene solvent.

In addition, the mixing ratio between the chloroprene-based adhesive and the xylene solvent may be configured at an appropriate ratio according to the intermediate coating method using any one of a roller, a brush, or a spray nozzle.

In addition, the secondary drying process is a process of drying the intermediate agent 40 by maintaining the pipe 10 subjected to the intermediate process at room temperature (15 ~ 25 ℃) for 4 to 5 hours, the drying temperature is less than 15 ℃ When the time exceeds 5 hours, the problem of productivity decreases, and when the temperature exceeds 25 ° C., the drying time is controlled to less than 4 hours, but the chloroprene-based adhesive deteriorates, thereby deteriorating physical properties. It is preferable to be dried.

In addition, the top coat process is the upper surface of the middle agent (40) inside the pipe (10) in which the top coat 50, a mixture of any one of a butyl rubber bond, EPDM bond or NR bond and toluene solvent 50 As a process of coating on, the top coat 50 can be firmly adhered to the middle coat 40 and any adhesive agent having properties similar to the adhesive 60 adhered to one side of the rubber plate 20 can be used. However, it is preferable to use what mixed the adhesive agent and toluene solvent of any one of butyl rubber bond, EPDM bond, or NR bond.

In addition, the mixing ratio between the adhesive of any one of the butyl rubber bond, EPDM bond or NR bond and the xylene solvent may be configured in an appropriate ratio as the coating method of the top coat process using any one of a roller, a brush or a spray nozzle.

In addition, the third drying process is a process of drying the top coat 50 by maintaining the pipe 10 treated with the top coat process at room temperature (15-25 ° C.) for 11-13 hours, and drying when the drying temperature is less than 15 ° C. When the time exceeds 13 hours, the problem of productivity is reduced, and when the temperature exceeds 25 ℃, the drying time is controlled to less than 11 hours, but the problem occurs that the physical properties deteriorate due to degradation of the top coat 50, the temperature within the above range It is preferred to be dried for a time.

In connection with the above, the present invention is applied to the adhesive 60 mixed with toluene solvent any one of the butyl-based rubber bond, EPDM bond or NR bond on one side of the rubber plate 20 of the adhesive coating step (S300). And, after the adhesive 60 is applied, it is configured to dry for 1 to 2 hours at room temperature (15 ~ 25 ℃), the adhesive 60 applied to one side of the rubber plate 20 surface only dried state It can be configured to have.

That is, when the adhesive 60 applied to one side of the rubber plate 20 is introduced into the pipe 10 while maintaining only the surface of the rubber plate 20, the adhesive 60 and the pipe 10 applied to the rubber plate 20 are introduced into the pipe 10. The friction between the adhesive applied and dried inside can be reduced, and as a result, an effect of reducing the loss due to the flow of the adhesive 60 applied to the rubber plate 20 can be obtained.

At this time, when the adhesive 60 of the type applied to one side of the rubber plate 20 is dried at a temperature of 15 ℃, the drying time is more than 2 hours, a problem that the productivity is reduced, to a temperature exceeding 25 ℃ When dried, the drying time is controlled to less than 1 hour, but because the adhesive 60 is excessively cured, resulting in a problem that the adhesive strength is lowered, it is preferable that the drying process be performed at a temperature and time within the above range.

In addition, the rubber plate attachment step (S400) is wound around the rubber plate 20 treated with the adhesive coating step (S300) to the outer surface of the adhesive 60 coated on the air tube having a diameter corresponding to the inner diameter of the pipe 10, the rubber plate ( 20) The joints 70, which are connected at both ends, are overlapped, and the air tube wound on the outer surface of the rubber plate 20 is introduced into the pipe 10 in the longitudinal direction, and then air is injected into the air tube to form an adhesive ( 60 is a treatment step of adhering one side of the rubber plate 20 coated with the inner surface of the pipe 10 coated with the adhesive.

At this time, the air tube has a certain length corresponding to the longitudinal direction of the pipe 10, and when the air is filled in the air tube is enough to compress the rubber plate 20 wound on the outside in the direction of the inner surface of the pipe 10 Has a diameter.

In addition, when the film or sheet is attached to prevent the adhesive 60 from adhering to the rubber plate 20 coated with the adhesive 60 on one side, the air tube on which the rubber plate 20 is wound is removed by removing the film or sheet. It should be drawn longitudinally into the pipe 10.

In addition, the rubber plate 20 wound on the air tube has an outer diameter smaller than the inner diameter of the pipe 10 to which the adhesive is applied, and when the rubber plate 20 is drawn together with the air tube into the pipe 10, the adhesive 60 applied to one side of the rubber plate 20. ) Is preferably applied to the inner surface of the pipe 10 so as to interfere with the dried adhesive to a minimum.

In addition, the rubber plate attaching step (S400) is the air inlet provided at one end of the air tube (the other end is closed) when the air tube wrapped with the rubber plate 20 on the outer surface into the pipe 10 is completed. By injecting high pressure air through the adhesive 60 is applied to one side of the rubber plate 20 is applied to the inner surface of the pipe 10 is firmly adhered to the dried adhesive.

At this time, the air pressure injected into the air tube can be appropriately adjusted according to the judgment of those skilled in the art, and the holding time of the air pressure can be freely adjusted according to the judgment of those skilled in the art, but the adhesive 60 applied to the rubber plate 20 is completely cured. It is more preferable to maintain the air pressure until In addition, when the rubber plate 20 is firmly attached to the inner surface of the pipe 10, the air tube removing step (S500) for removing air from the air tube is performed.

In addition, the heat treatment step (S600) is a step of vulcanizing the pipe 10 treated with the air tube removing step (S500). Process for ~ 8 hours.

In addition, the present invention is treated after the air tube removing step (S500) after the heat treatment step (S600), the air tube after the rubber plate attachment step (S400) is 20 to 30% by volume of the air was injected into the outside of the air tube After the heat treatment step (S600) may be configured to be processed. At this time, the discharge of the air of the air tube 20 to 30% by volume than when the heat treatment step (S600) treatment is performed by the heat applied in the heat treatment step (S600) or the air tube bursts or the rubber plate 20 and the pipe ( 10) This is to prevent the adhesive located between the inside from being broken by the high pressure of the air tube.

The order of manufacturing the pipe 10 having the rubber plate 20 attached thereto by the rubber lining method inside the pipe according to the present invention is as follows.

First, a sanding grinder mounted on one end of a guide bar having a length corresponding to the pipe 10 is inserted into an inner surface of the metal pipe 10 having a length of 5 m and an inner diameter of 10 cm to remove rust and foreign matter. Thereafter, the rubber plate 20 made of EPDM rubber material having a length corresponding to the length of the pipe 10 is cut to have a width of 3 to 6 cm longer than the inner diameter of the pipe 10.

Subsequently, on the inner surface of the pipe 10 from which the rust and foreign matters were removed, the first agent 30 (mixed with a chemlok-6108 and xylene solvent in a weight ratio of 4: 1) to an average thickness of 20 μm. Spray coating, the spray coating is applied to the first coating 30 in a state in which a guide bar (corresponding to the length of the pipe 10) provided with a plurality of adhesive spray nozzles at equal intervals into the inside of the pipe 10 (10) Process by spraying inside.

In addition, the pipe 10 is applied to the inner surface of the supernatant 30 is dried for 5 hours at a temperature of 20 ℃.

Thereafter, the supernatant 30 is mixed with the intermediate 40 (the chemlok-205 and the xylene solvent in a weight ratio of 1:30 on the upper surface of the supernatant 30 in the dried pipe 10). ) Is sprayed with an average thickness of 20 µm. At this time, the injection device uses the same principle as that of the first injection device 30.

In addition, the pipe 10 is applied to the upper surface of the middle agent 40, the primer 10 is dried for 4 hours at a temperature of 20 ℃.

Thereafter, the intermediate agent 40 has an average thickness of 20 μm on the upper surface of the intermediate agent 40 inside the pipe 10 in which the intermediate agent 40 is dried (mixing EPDM bond and toluene in a 1:30 weight ratio). Spray with. At this time, the injection device uses the same principle as that of the first injection device 30.

In addition, the pipe 10 coated with the EPDM bond, which is the upper coating agent 50, on the upper surface of the middle coating agent, is dried at a temperature of 20 ° C. for 12 hours.

In addition, the adhesive 60 (mixing EPDM bond and toluene in a 1: 30 weight ratio) was applied to one side of the rubber plate 20 cut in the above by using a roller with an average thickness of 20 μm, and the temperature of 20 ° C. After drying for 1 hour, only the surface of the adhesive 60 is slightly dried (undried). Then, the synthetic resin film is covered on the upper surface of the adhesive 60 to protect the adhesive.

In addition, the adhesive 60 is applied to the undried rubber plate 20 is wound around the air tube so that the adhesive 60 is applied to the outer surface. At this time, both ends of the rubber plate 20 in the width direction overlap each other by about 5 cm.

Thereafter, the synthetic resin film covered on one side of the rubber plate 20 is removed, and the air tube on which the rubber plate 20 is wound is pushed into the pipe 10. At this time, those skilled in the art may fasten the string to the front end of the air tube or the rubber plate 20, and then first penetrate the line into the pipe 10 and pull the line and push the air tube into the pipe 10. have.

When the inlet of the air tube in which the rubber plate 20 is wound into the pipe 10 is completed, high-pressure air is injected into the air tube so that one side of the rubber plate 20 to which the adhesive 60 is applied and the inside of the pipe 10 are filled. The applied and dried top coat layer can be firmly adhered to each other.

In addition, after 12 hours, the air of the air tube is drained, the air tube is removed from the inside of the pipe 10, the pipe 10 having the rubber plate 20 attached to the steam heat processor is introduced, and then vulcanized at atmospheric pressure for 50 hours. The rubber plate 20 completes the pipe attached thereto.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10 pipe 20 rubber plate
30: beginner 40: intermediate
50: top coat 60: adhesive bonded to the rubber sheet
70: joint
S100: Surface leveling step S200: Rubber plate cutting step
S300: adhesive application step S400: rubber plate attachment step
S500: air tube removal step S600: heat treatment step

Claims (4)

Surface smoothing step (S100) for removing rust or foreign matter on the inner surface of the pipe (10);
Rubber plate cutting step (S200) for cutting the rubber plate 20 having an area corresponding to the inner surface of the pipe (10);
Applying the first surface 30 of the pipe 10, the isocyanate-based adhesive and the xylene solvent on the inner surface of the pipe (10) treated with the surface smoothing step (S100) Initial process; A first drying process of drying the first processed pipe 10 at room temperature for 4-8 hours; Applying an intermediate (40) mixed with a chloroprene-based adhesive and a xylene solvent to an upper surface of the initial agent (30) in the pipe (10) subjected to the primary drying process; A secondary drying process of drying the pipe 10 subjected to the intermediate process at room temperature for 4 to 5 hours; Top coat 50 coated with an adhesive of any one of butyl rubber bond, EPDM bond or NR bond and toluene solvent to the upper surface of the middle agent 40 in the pipe 10 subjected to the secondary drying process Process; Adhesive coating step (S300) comprising ;; a third drying process for drying the pipe 10, the process of the top coat process for 11 ~ 13 hours at room temperature;
The adhesive plate (S300) is wound around the rubber plate 20, the adhesive coating surface is wound to the outside in an air tube having a diameter corresponding to the inner diameter of the pipe 10, the joint portion 70 at both ends of the rubber plate 20 After binding to overlap, the air tube wound on the outer surface of the rubber plate 20 is introduced into the pipe 10 in the longitudinal direction, and then injected into the air tube of the rubber plate 20 coated with the adhesive 60 Rubber plate attachment step (S400) for bonding the side and the inner surface of the pipe 10, the adhesive is applied;
An air tube removing step (S500) of removing an air tube located inside the pipe 10 in which the rubber plate attaching step (S400) is processed;
Rubber lining method inside the pipe, characterized in that it comprises a; heat treatment step (S600) for vulcanizing the treated pipe (10) the air tube removing step (S500).
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