JP2009006224A - Apparatus for lining inner wall of pipe and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for lining the inner wall of a pipe and its method in which the durability of a coating layer is improved because the coating layer is uniformly pressed and prepared by the expanding pressure of a covering film tube. <P>SOLUTION: The expanding pressure generated in connection with expanding the covering film tube 22 by the driving pressure of a fan 19 is transferred to the coating layer 17 when the covering film tube 22 moves along the coating layer 17 by reverse rotation in close contact. Thus, the coating layer 17 is prepared under a uniform pressure by the expanding pressure from the covering film tube 22 in an expanding state, and the adhesion of the coating layer 17 to the inner peripheral surface of a vertical pipe 8 is strengthened while the coating layer 17 of a uniform thickness is produced, thereby improving the durability for a longer life. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pipe inner wall lining device and a pipe inner wall lining method in which coating is performed on the outer peripheral portion of a pipe such as a buried pipe, a drain pipe or a water supply pipe.

Many types of foreign matter such as food residues, oils and fats, used detergents, hair, gravel and earth and sand adhere to and accumulate on pipes such as buried pipes and water supply and drainage pipes that are placed inside or outside the building. Water scale). In order to maintain the function and hygiene of the piping, the cleaning equipment is used to periodically clean the piping to completely remove the scale that adheres to and accumulates on the piping. Since it is necessary to ensure durability and the like after the piping is cleaned, a coating having a predetermined thickness is formed in a layer in the piping by a lining device (see, for example, Patent Document 1).
JP 2004-141843 A

In patent document 1, the bag body which can be expanded / contracted arrange | positioned in a contact state with the coating material supplied to piping is provided. By applying a suction pressure in the pipe, the bag body moves sequentially while spreading the paint on the inner peripheral part of the pipe, thereby coating the inner wall of the pipe.
Since the bag body acts as a spatula for applying the paint to the inner wall of the pipe and uniformly applies the paint, a pipe lining apparatus that is highly workable and cost-effective is realized.

  However, for example, as shown in FIG. 8, the inner surface of the vertical pipe K is slightly thicker, or the freshly painted paint layer J generally tends to hang down due to its own weight. There is a risk of dripping as paint dripping Dp. For this reason, it is difficult to equalize the thickness, and the adhesion of the paint layer J to the vertical tube K is lowered, resulting in a problem that durability is lowered. In particular, when the vertical pipe K is large in diameter and the thickness of the paint layer J is increased, the occurrence of paint dripping Dp is expected to be remarkable.

  The present invention has been made in view of the above circumstances, and the object thereof is to prepare the coating layer uniformly pressed by the expansion pressure of the covering membrane cylinder by a dedicated equalizing means. Accordingly, it is an object of the present invention to provide a pipe inner wall lining device and a pipe inner wall lining method in which the adhesion of a paint layer to the pipe becomes stronger and the service life is improved by improving the durability.

(About claim 1)
In the pipe inner wall lining apparatus having the equalizing means for pressing and equalizing the paint layer applied to the inner peripheral surface of the pipe, the equalizing means has a covering membrane cylinder and a pressure feeding means. The covering membrane cylinder is mounted and set on the inner peripheral surface of the pipe to which the paint layer is applied by reversing the front and back of the opening tip. The pressure feeding means supplies the driving pressure to the opening tip in the pipe, so that the inner peripheral surface of the covering membrane cylinder is pressed in close contact with the coating layer while the covering membrane cylinder is reversed along the coating layer. And proceed.

  When the covering film cylinder advances along the coating layer while being reversed to a close contact state, an expansion pressure generated by expanding the covering film cylinder by the driving pressure is transmitted to the coating layer. For this reason, the coating layer is prepared by being pressed evenly by the expansion pressure from the bulging cover membrane cylinder, and the coating layer adheres firmly to the inner peripheral surface of the pipe as the coating layer thickness becomes uniform. Thus, the durability can be extended by improving the durability.

(About claim 2)
A lamp that moves with the progress of the covering membrane cylinder fed into the pipe and irradiates the coating layer to dry is provided so as to follow the covering membrane cylinder.
In this case, since the curing process is facilitated by drying the coating layer after painting, it can be reused in a short time after the painting operation.

(Claim 3)
The equalizing means includes a boss portion provided rotatably with respect to the covering membrane cylinder, an outer ring portion arranged concentrically with the boss portion and penetrating a plurality of spheres at equal intervals, and radiating from the boss portion. A pressing means is provided that includes a blade portion extending in the direction and connected to the outer ring portion. The blade part receives the driving pressure and rotates to cover the sphere and press it against the membrane cylinder to press the coating layer evenly.
In this case, since the pressing force from the sphere acts on the coating layer in addition to the expansion pressure of the covering film cylinder, the coating layer adheres more uniformly to the piping in accordance with the uniform thickness of the coating layer. be able to.

(About claim 4)
The equalizing means includes a boss portion rotatably provided with respect to the covering membrane cylinder, an outer ring coil spring arranged concentrically with the boss portion and penetrating a plurality of spheres at equal intervals, and a boss portion There is provided pressing means comprising a coil spring type spoke connected between the outer ring coil spring and a blade portion extending radially from the boss portion. The blade portion receives driving pressure and rotates, and the sphere is pressed against the covering membrane cylinder against the urging force of the outer ring coil spring and the coil spring type spoke, thereby pressing the coating layer evenly.

In the paint layer, in addition to the expansion pressure of the cover membrane cylinder, a pressing force from the sphere acts on the paint layer, so that the paint layer adheres to the pipe in accordance with the uniform thickness of the paint layer. It can be made even stronger.
In this case, since the pressing force of the sphere against the covering membrane cylinder is limited by both urging forces of the outer ring coil spring and the coil spring type spoke, the sphere may exert an excessive pressing force on the covering membrane cylinder. There is no.

(Claim 5)
In the pipe inner wall lining method having an equalizing step of pressing and equalizing a paint layer applied to the inner peripheral surface of the pipe, the equalizing step includes a setting step and a pressure feeding step.
In the setting step, the front and back of the opening tip of the covering membrane cylinder are reversed, and the covering membrane cylinder is attached and set to the inner peripheral surface of the pipe to which the paint layer has been applied. In the pumping process, the driving pressure is supplied to the tip of the opening in the pipe, so that the inner peripheral surface of the covering membrane cylinder is pressed against the coating layer while being reversed along the coating layer. And proceed.

  When paint is applied to the pipe, the paint layer receives a substantially uniform bulging pressure from the bulging cover cylinder, and the paint layer adheres to the inner peripheral surface of the pipe as the paint layer thickness becomes uniform. As a result, the service life can be extended by improving the durability.

(About claim 6)
There is a curing process step in which the lamp is moved along with the progress of the covering membrane cylinder fed into the pipe, and the coating layer is irradiated with the lamp and dried.
In this case, as in the case of claim 2, the curing process by drying the paint layer after coating is facilitated, so that it can be reused in a short time after the painting operation.

(About claim 7)
The equalizing means includes a boss portion provided rotatably with respect to the covering membrane cylinder, an outer ring portion arranged concentrically with the boss portion and penetrating a plurality of spheres at equal intervals, and radiating from the boss portion. A pressing means is provided that includes a blade portion extending in the direction and connected to the outer ring portion. The blade portion receives the driving pressure and rotates, and has a pressure equalizing process for covering the sphere and pressing it against the membrane cylinder to press the coating layer evenly.

  Since the pressing force from the sphere acts on the coating layer in addition to the expansion pressure of the cover membrane cylinder, the coating layer adheres to the pipe in line with the uniform thickness of the coating layer as in the third aspect. Can be further strengthened.

(About claim 8)
There is a hot water circulation step in which hot water from the pump is covered by a pumping hose and sprayed to the paint layer through the membrane cylinder, and the hot water after spraying is returned to the pump by a return hose and circulated. For this reason, the paint layer receives heat from hot water to promote chemical changes in the paint, and the paint layer can be made uniform while the paint layer is cured.

  In the present invention, the covering membrane cylinder expands due to the driving pressure, and the coating layer in the pipe receives the expansion pressure of the covering membrane cylinder, so that the coating layer adheres to the piping in accordance with the uniform thickness of the coating layer. Realizes longer life by strengthening.

1 to 4 show Embodiment 1 of the present invention.
FIG. 1 shows an example of lining construction in a drain pipe of a building H, which has a vertical vent pipe 1, a sewage main pipe 2 and a miscellaneous drain main pipe 3 communicating with an external dredger 5 as pipes. An indoor horizontal pipe 4 communicating with each floor F is provided from the miscellaneous drainage main pipe 3.

  In the piping, a vertical pipe 8 is provided as shown in FIG. 2 for flowing miscellaneous waste water through a concrete slab (not shown) in each floor F. When the inner wall portion of the vertical tube 8 is corroded with long-term use and needs to be repaired, the vertical tube 8 is cleaned in advance, and deposits such as dust and scale that have flowed down from the inner wall of the vertical tube 8 are deposited. Is recovered from the external dredge 5 by a universal pipe rehabilitation vehicle 6 (VacL machine) (see FIG. 1). After completion of this cleaning, the pipe inner wall lining device 9 is used.

  The pipe inner wall lining device 9 includes a reversing machine 13 in which a winding wheel 12 is rotatably provided in a housing 11 connected to a blower 10. The opening 11 a of the housing 11 is connected to the lower end opening 8 a of the vertical tube 8 via the connecting body S. The long lining cloth tube 14 is wound around the take-up wheel 12 so that it can be fed out as will be described later, and a cloth such as liquid epoxy resin is impregnated into the cloth. A resin tube 15 inserted so as to cover the outer peripheral surface portion is provided on the outer peripheral surface portion of the lining cloth tube 14.

The thickness of the lining cloth pipe 14 is, for example, 3 to 4 mm, and the outer diameter is formed in a size corresponding to the inner diameter of the vertical pipe 8 to be subjected to lining construction.
The rear end portion of the lining cloth tube 14 and the rear end portion of the resin tube 15 are detachably connected to the guide tube portion 16 that is fed out from the winding wheel 12 of the reversing machine 13. The lining cloth tube 14, the resin tube 15, and the guide tube portion 16 are wound around the winding wheel 12 of the reversing machine 13. At the start of the work, the front and back of the opening tip 14a of the lining cloth tube 14 and the opening tip 15a of the resin tube 15 are reversed and fixed to the lower end opening 8a of the vertical tube 8.

  When the blower 10 is energized, a driving pressure is generated and works on the opening front end portions 14 a and 15 a of the lining cloth tube 14 and the resin tube 15. The coating layer 17 is formed in such a manner that the inner peripheral surface of the lining cloth tube 14 is in close contact with the inner wall of the vertical tube 8 with a substantially uniform thickness evenly and uniformly.

  Accompanying the formation of the coating layer 17 by the lining cloth tube 14, it is possible to repair and completely close cracks, seams, pinholes, corrosion holes and the like generated on the inner wall of the vertical tube 8. The resin tube 15 that is inverted together with the lining cloth tube 14 is pressed against the paint layer 17 by driving pressure, thereby preparing the coating condition of the paint layer 17. After the construction of the paint layer 17, the guide tube portion 16 is wound up by the winder 12 of the reversing machine 13, and the resin tube 15 is peeled off from the paint layer 17 and stored in the housing 11 of the reversing machine 13.

FIG. 3 shows the equalizing means 18 used after the coating layer 17 is applied, and the coating layer 17 applied to the inner peripheral surface of the vertical tube 8 is pressed to equalize the thickness.
The equalizing means 18 includes a blower 19 as a pressure feeding means, a housing 20 connected to the blower 19, a take-up reel 21 provided in the housing 20, and a long cover wound around the take-up reel 21. A membrane cylinder 22. The air outlet 20 a of the housing 20 and the lower end opening 8 a of the vertical tube 8 are connected in an airtight manner by a connecting body 23.

  The raw material of the covering membrane cylinder 22 is a plastic material such as polyethylene, polypropylene, polyester, polyurethane, ethyl vinyl, acetate, or polyvinyl chloride.

  A circulation pump 24 that circulates the hot water Ws from the hot water storage tank 27 </ b> A is provided for the connecting body portion 23. The return hose 25 has one end connected to the connecting body 23 and the other end connected to the suction port 24 a of the circulation pump 24. The flexible pumping hose 25 a has one end portion 25 c connected from the take-up reel 21 to the base end portion 16 a of the guide tube portion 16 and the other end portion connected to the discharge port 24 b of the pump 24.

The end portion 25c of the pumping hose 25a and the base end portion 16a of the guide tube portion 16 are connected by a well-known swivel joint (not shown), and the take-up reel 21 rotates as the guide tube portion 16 is pulled out. Even so, the connection state between the pumping hose 25a and the base end portion 16a of the guide tube portion 16 is maintained.
A plurality of ejection holes p that cover the hot water Ws and spray the membrane tube 22 are formed at the distal end portion of the guide tube portion 16. The temperature of the hot water Ws in the hot water tank 27A is normally set to a temperature range of 40 to 60 ° C., but this set temperature may be 70 to 80 ° C., and can be set as desired according to the use situation. .

  In the equalizing step of the pipe inner wall lining method, the covering membrane cylinder 22 is unwound from the take-up reel 21 and the opening tip 22a of the covering membrane cylinder 22 is turned over. Attached and set to the inner peripheral surface of the lower end opening 8a of the vertical tube 8 together with the opening 23a in an airtight state (setting step).

When the blower 19 is energized, the wind pressure from the blower 19 is supplied as drive pressure into the vertical tube 8 through the housing 20 and the connecting body 23. For this reason, the covering membrane cylinder 22 advances while pressing the inner peripheral surface of the covering membrane cylinder 22 against the coating layer 17 while being reversed along the coating layer 17 from the inverted opening front end portion 22a.
At this time, the circulation pump 24 is operated as necessary, and the hot water Ws from the hot water storage tank 27A is covered and sprayed to the paint layer 17 through the membrane cylinder 22 (hot water circulation step).

  In the above configuration, when the covering film cylinder 22 advances along the paint layer 17 while being reversed to a close contact state, the expansion pressure generated by the covering film cylinder 22 being expanded by the driving pressure is transmitted to the paint layer 17. At this time, the coating layer 17 is prepared by being pressed evenly by the swelling pressure from the covering membrane cylinder 22 in the bulging state. As a result, as the thickness of the paint layer 17 becomes uniform, the adhesion of the paint layer 17 to the inner peripheral surface of the vertical tube 8 becomes stronger, and the life is extended by improving the durability.

  Since there is provided a hot water circulation step in which hot water Ws is sprayed and circulated through the coating film cylinder 22 to the paint layer 17, the paint layer 17 receives heat from the hot water Ws to promote chemical changes in the paint, and the paint layer It is possible to make the thickness uniform while performing the curing process 17. In particular, in winter when the outside air temperature is low, curing can be promoted while applying heat to the paint layer 17 by circulating hot water Ws, which is advantageous in preparing the paint layer 17 evenly.

  When there is a branching agent (not shown) such as a branch pipe, the paint layer 17 of the branch pipe is pierced into an open state when the paint layer 17 is applied. Since the dedicated equalizing means 18 is used after the coating layer 17 is applied, it is not necessary to drill the coating layer 17 when the equalizing means 18 is used. The finish state of the paint layer 17 in the opening of the can be improved.

In a general high-rise building, a collective joint 26 such as a single-pipe drainage type sorbent or a section shown in FIG. 4 is used. The collective joint 26 has cross-sectional shape suddenly changing portions 26a, 26b, and 26c that connect the horizontal pulling pipe 27 and the vertical main pipes 28 and 29, and the diameter of the inside changes suddenly.
In this case, since the covering membrane cylinder 22 is thin, it is faithfully deformed along the shape of the counterpart, closely contacts the inner peripheral surfaces of the cross-sectional shape suddenly changing portions 26a, 26b, and 26c, and the thickness of the coating layer 17 And uniform adhesion of the paint layer 17 can be realized.

FIG. 5 shows a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that a halogen lamp 31 with a socket 30 is connected to the subsequent guide tube section 16 with a string 32.
For this reason, the halogen lamp 31 moves as the covering membrane cylinder 22 fed into the vertical tube 8 advances, and the paint layer 17 is irradiated and dried and cured by energizing the halogen lamp 31 (curing process step). .

  Thereby, since the hardening process by drying of the paint layer 17 after painting is promoted, it can be used for a short time after the painting work. The halogen lamp 31 is connected to the guide tube portion 16 that appears as the covering membrane cylinder 22 is unwound from the take-up reel 21 during operation. The halogen lamp 31 is an example, and any lamp may be used as a heat source that exerts drying and curing on the paint layer 17.

FIG. 6 shows a third embodiment of the present invention. The third embodiment is different from the first embodiment in that the pressing means 34 that covers the sphere 33 and presses against the membrane cylinder 22 is connected to the subsequent guide tube portion 16.
The pressing means 34 is disposed concentrically with the boss portion 36 provided rotatably in the guide tube portion 16 via the bearing 35, and penetrates the plurality of spheres 33 in a bead shape at equal intervals. The outer ring portion 37 includes a plurality of blade portions 38 that extend radially from the boss portion 36 and are connected to the outer ring portion 37.

When the air blower 19 is energized, the blade portion 38 receives the driving pressure together with the outer ring portion 37 and rotates to press the sphere 33 against the membrane cylinder 22 and press the coating layer 17 evenly (pressure equalizing step). .
Since the pressing force from the sphere 33 acts on the coating layer 17 in the third embodiment in addition to the expansion pressure of the covering film cylinder 22, the coating layer 17 for the vertical pipe 8 is made uniform with the uniform thickness of the coating layer 17. The adhesion of can be further strengthened. The pressing means 34 is connected by inserting a bearing 35 into the guide tube portion 16 that appears as the cover membrane cylinder 22 is unwound from the take-up reel 21 during operation.

  FIG. 7 shows a fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in that the outer ring portion 37 is an outer ring coil spring 39 and the outer ring coil spring 39 and the boss portion 36 are connected by a coil spring type spoke 40. The blade portion 38 extending from the boss portion 36 is set to be shorter than the diameter dimension of the outer ring coil spring 39.

In this case, the spherical body 33 presses the covering membrane cylinder 22 against both urging forces of the outer ring coil spring 39 and the coil spring type spoke 40 due to the centrifugal force accompanying the rotation of the blade portion 38.
That is, since the pressing force of the sphere 33 against the covering membrane cylinder 22 is limited by both biasing forces of the outer ring coil spring 39 and the coil spring type spoke 40, the sphere 33 is excessively pressing against the covering membrane cylinder 22. Will not work.

(Modification)
(A) The coating material in Examples 1 to 3 is not limited to the epoxy resin, and the lining cloth tube 14 having excellent strength can be functioned as the coating layer 17 by incorporating FRP as a reinforcing material.
(B) When the lining cloth tube 14 is advanced along the longitudinal tube 8, the driving pressure by the blower 10 is used. However, the lining cloth tube 14 may be advanced in the depth direction by suction using negative pressure.

(C) Although the cross-sectional shape of the lining cloth tube 14 is circular according to the cross-sectional shape of the vertical tube 8, it is not limited to this, and it may be formed into a triangle, a rectangle, a rectangle, an ellipse, or a polygon.
(D) The covering membrane cylinder 22 is not limited to plastic, but may be a cloth or a net, or may also serve as a heat insulating material. In short, the lining cloth tube 14 is closely attached to the vertical tube 8. What is necessary is just to be able to press in a state.

(E) The lining cloth pipe 14 may be applied not only to a drainage pipe but also to a water pipe (water supply pipe, cooling water pipe), an air conditioning duct, an exhaust duct (industrial duct, a kitchen duct), and the like.
(F) The coating on the inner wall of the vertical tube 8 is not limited to the lining cloth tube 14, and may be performed by existing coating means such as using an umbrella-shaped coating bag. In short, the inner wall of the vertical tube 8 is used as a lining. Any material that can be applied with a coating layer may be used.

  In the pipe inner wall lining device, when the covering film cylinder moves along the coating layer while reversing in a close contact state, the driving pressure transmits the inflation pressure generated by expanding the covering film cylinder to the coating layer. For this reason, the coating layer is uniformly pressed and prepared, and the adhesion of the coating layer to the inner peripheral surface of the pipe is strengthened along with the uniform thickness of the coating layer, thereby extending the life. Due to the convenience of extending the service life with a simple operation, demand can be stimulated and applied to the chemical machinery industry through the distribution of related parts.

It is the schematic which shows the lining construction example of the drain pipe used as the object of repair coating (Example 1). It is a longitudinal cross-sectional view which shows the state which attaches a lining cloth pipe | tube to a vertical pipe with a reversing machine, and performs a painting operation (Example 1). (Example 1) which is a longitudinal cross-sectional view which shows the state which presses a covering membrane cylinder to the coating layer of a vertical pipe by the equalization means. It is a perspective view of the collective joint in a single pipe type drainage system (use example in Example 1). (Example 2) which is a longitudinal cross-sectional view which shows the state which presses a covering membrane cylinder on the coating layer of a vertical pipe using a halogen lamp. (A) is a longitudinal cross-sectional view which shows the state which presses a covering membrane cylinder to the coating layer of a vertical pipe using a press means in a pressure equalization preparation process, (b) is a longitudinal section along the AA line of (a). (Example 3) which is a top view. (Example 4) which is a longitudinal cross-sectional view which shows the state which presses a covering membrane cylinder to the coating layer of a vertical pipe using a press means at a pressure equalization preparation process. It is a longitudinal cross-sectional view which shows the internal peripheral surface of the vertical pipe painted with the conventional piping lining apparatus.

Explanation of symbols

1 Vent pipe (pipe)
2 Sewage main (piping)
3 Miscellaneous drainage main (pipe)
4 indoor horizontal pipe (pipe)
8 Vertical pipe (pipe)
8a Lower end opening of vertical pipe 9 Piping inner wall lining device 14 Lining cloth pipe 14a Opening tip of lining cloth pipe 17 Paint layer 18 Equalizing means 19 Blower (pressure feeding means)
22 Cover membrane cylinder 22a Opening tip of cover membrane cylinder 24 Pump 24a Suction port 25 Return hose 25a Pump hose 31 Halogen lamp (lamp)
33 Spherical body 34 Pressing means 36 Boss part 37 Outer ring part 38 Blade part 39 Outer ring coil spring 40 Coil spring type spoke Ws Hot water

Claims (8)

In the pipe inner wall lining device having the equalizing means for pressing and equalizing the paint layer applied to the inner peripheral surface of the pipe,
The equalizing means includes
Reversing the front and back of the opening tip, a cover membrane cylinder that is attached to the inner peripheral surface of the pipe to which the paint layer has been applied, and
By supplying a driving pressure to the opening tip in the pipe, the covering membrane cylinder is reversed along the coating layer, and the inner peripheral surface of the covering membrane cylinder is brought into close contact with the coating layer. A piping inner wall lining device, comprising: a pressure feeding means that advances by being pressed.   The lamp is provided to follow the covering membrane cylinder so as to move along with the progress of the covering membrane cylinder fed into the pipe and irradiate and dry the coating layer. The piping inner wall lining apparatus according to 1.   The equalizing means includes a boss portion provided rotatably with respect to the covering membrane cylinder, an outer ring portion arranged concentrically with the boss portion and penetrating a plurality of spheres at equal intervals, A pressing means comprising a wing portion extending in a radial direction from the boss portion and connected to the outer ring portion is provided, the wing portion is rotated by receiving the driving pressure, and pushes the sphere against the covering membrane cylinder. 2. The pipe inner wall lining device according to claim 1, wherein the coating layer is pressed evenly.   The equalizing means includes a boss portion rotatably provided with respect to the cover membrane cylinder, an outer ring coil spring that is arranged concentrically with the boss portion and penetrates a plurality of spheres at equal intervals, A pressing means comprising a coil spring type spoke connected between the boss part and the outer ring coil spring and a blade part extending radially from the boss part is provided, and the blade part is provided with the driving pressure. And the sphere is pressed against the covering membrane cylinder against the urging force of the outer ring coil spring and the coil spring type spoke to uniformly press the coating layer. The pipe inner wall lining device according to claim 1. In the pipe inner wall lining method having an equalizing step of pressing and equalizing the paint layer applied to the inner peripheral surface of the pipe,
The equalization step includes
A set step of reversing the front and back of the opening tip of the covering membrane cylinder and attaching and setting the covering membrane cylinder on the inner peripheral surface of the pipe to which the paint layer has been applied;
By supplying a driving pressure to the opening tip in the pipe, the covering membrane cylinder is reversed along the coating layer, and the inner peripheral surface of the covering membrane cylinder is brought into close contact with the coating layer. A piping inner wall lining method, comprising: a pressure feeding step that proceeds by pressing.   6. The method according to claim 5, further comprising a curing treatment step of moving the lamp as the covering membrane cylinder fed into the pipe advances and irradiating and drying the coating layer with the lamp. Piping inner wall lining method.   The equalizing means includes a boss portion rotatably provided with respect to the covering membrane cylinder, an outer ring portion arranged concentrically with the boss portion and penetrating a plurality of spheres at equal intervals, and the boss A pressing means comprising a blade portion extending in a radial direction from the portion and connected to the outer ring portion, the blade portion rotating by receiving the driving pressure, and pressing the sphere against the covering membrane cylinder The pipe inner wall lining method according to claim 5, further comprising a pressure equalizing step for uniformly pressing the paint layer.   It has a hot water circulation process in which hot water from a pump is sprayed to the paint layer through the cover membrane cylinder by a pumping hose, and the hot water after spraying is returned to the pump by a return hose and circulated. The pipe inner wall lining method according to any one of claims 5 to 7.

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