JP2007292118A - Pipe lining device and pipe lining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe lining device and a pipe lining method for actualizing earthquake resistance reclamation to improve the workability of applying a coating to a main waste water pipe from miscellaneous sources on the outdoor side and a pipe network on the indoor side while preventing the crack of a connection portion between the main waste water pipe and the pipe network and the rupture of a corrosive portion even in earthquake. <P>SOLUTION: Since the pipe network 6 is cut off and separated from the main waste water pipe 3 during applying a coating, the coating can be applied to both of them at the same time in a short time with reasonable coating workability to improve cost-advantageous workability. Then, the pipe network and the main waste water pipe 3 are connected together via a flexible joint 17, and so a difference between the quake of the pipe network 6 and the quake of the main waste water pipe 3 in earthquake is absorbed by the flexible joint 17. This actualizes earthquake resistance reclamation to prevent the crack of the connection portion between the main waste water pipe 3 and the pipe network 6 and the rupture of the corrosive portion and maintains water draining function in a washing machine, a restroom, a bathroom and a kitchen on the indoor side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe lining apparatus and a pipe lining method provided with a flexible joint that connects a piping network on the indoor side of a building and a main pipe on the outdoor side when coating for rehabilitation is performed.

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 mains and water supply and drainage pipes installed in buildings, forming scale substances with rust. ing. In order to prevent the odor and restore the function and hygiene of the piping, the piping is periodically cleaned using a cleaning device to completely remove the scale material adhering to the piping.
After cleaning the pipe, in order to recover the hygiene and durability of the pipe, a coating material having a predetermined thickness is applied in layers in the pipe by a lining device (see, for example, Patent Documents 1 and 2).

In Patent Document 1, a moving object in the shape of an umbrella is connected to a rope means in a pipe, moved by a driving pressure, and a paint is pressed against the inner wall of the pipe and applied. In Patent Document 2, a lining cloth tube that can be reversed on both sides is connected to a cable body, and the liner layer is moved by moving it in the depth direction while closely contacting the inner peripheral surface of the lining cloth tube that is reversed on the front and back surfaces to the inner wall of the pipe. Forming.
JP 2005-296720 A JP 2004-291605 A

In this case, the main pipe is connected to the indoor pipe via the branch pipe, and forms a piping system in which the indoor side and the indoor side are continuously connected by the pipe. When painting the main pipe, the communication opening of the branch pipe is blocked by a coating layer or a liner layer that travels across the branch pipe.
For this reason, it is necessary to dispose the robot in the main pipe, remotely operate it through a monitor, and to cut off the closed portion and reproduce the communication opening. As a result, after painting the main pipe outside the room, it is necessary to take a set-up to start painting the pipe inside the room. As a result, in addition to using an expensive robot, the main pipe on the outdoor side and the pipe on the indoor side have to be painted back and forth, which makes the painting work long and inefficient and disadvantageous in cost.

In general, the outdoor main is installed on the concrete slab from the ground, and the indoor piping is installed on the floor and ceiling. Therefore, when an earthquake occurs, the main and the piping have different frequencies and cycles. Will be received individually.
At this time, there is a possibility that the branch pipe from the main pipe repeatedly undergoes a large bending at the root portion to cause a crack or breakage at a corroded portion of the pipe. If a branch pipe or pipe cracks or a corroded part breaks, the drainage function around the washing machine, washroom, bathtub, or kitchen will be delayed, causing a major hindrance to daily life and living in the building. Inconvenience that cannot be continued.

  The present invention has been made in view of the above circumstances. The purpose of the present invention is to improve the workability of painting the main pipe on the outdoor side and the piping network on the indoor side when applying rehabilitation paint, and to receive earthquakes and the like. However, it is an object of the present invention to provide a pipe lining apparatus and a pipe lining method capable of realizing seismic rehabilitation to prevent cracks at the connecting portion between the main pipe and the pipe network and breakage at the corroded portion.

(About claim 1)
The piping network is provided on the indoor side of the building and receives miscellaneous drainage. The main pipe is provided on the outdoor side and connected to a pipe network. The inner wall of the pipe is painted by moving the coating section in the pipe having the pipe network and the main pipe. A pipe-shaped flexible joint is used to connect the cut and separated pipe network and the main pipe when painting the pipe. Shaking of the pipe network and main pipe caused by an earthquake, etc. The difference between and is absorbed by the flexible joint.

In this configuration, the pipe network and the main pipe are cut and separated when painting the pipe, so that when both the pipe network and the main pipe are coated, both can be coated at the same time. For this reason, the workability of the painting is rational, and it takes a short time, which is advantageous in terms of cost and improves the workability.
When there is no need to paint the pipe network or when the pipe network is newly replaced, only the main pipe needs to be painted, and the painting work can be completed more efficiently in a shorter time. The same applies when painting only the piping network.

After painting, the pipe network and the main pipe are connected by the flexible joint, so that the difference between the fluctuation of the pipe network and the main pipe caused by an earthquake or the like can be absorbed by the flexible joint. For this reason, the earthquake rehabilitation which prevents the crack in the connection part of a main pipe and a piping network and the fracture | rupture in a corrosion part is implement | achieved.
Along with this seismic rehabilitation, the drainage function in the washing machine, washroom, bathtub, and kitchen around the room is well maintained. As a result, as an earthquake or the like stops, there is a convenience that can be continued as usual without interrupting daily living.

Because flexible joints can be used to improve seismic rehabilitation, it is easy to increase the customer's willingness to work with this seismic rehabilitation as an added value, which is advantageous for popularizing and expanding the painting-related business.
Also, if the piping network and the main pipe are connected with joint pipes of the same quality, etc., misalignment occurs in the connection structure of the joint pipe with respect to the piping network and the main pipe due to aging, etc. In addition, the connection structure may become unstable.
However, since misalignment with respect to the piping network and the main pipe is absorbed by the flexible joint, local stress is not applied to these connection structures, and a stable connection structure can be maintained over a long period of time.

(About claim 2)
The flexible joint is composed of a bellows-shaped metal cylinder part whose outer peripheral part undulates and a stainless steel mesh band that covers the outer peripheral part of the metal cylinder part. The undulation state of the metal cylinder part is configured to be denser toward the both end parts as compared to the center part.
For this reason, there is an advantage that a high frequency component with a short amplitude can be satisfactorily absorbed at both ends of the metal cylinder portion among the vibrations caused by an earthquake or the like. And since the metal cylinder part of a flexible joint is nonflammable, it meets the requirements on fire prevention measures.

(Claim 3)
The flexible joint is composed of a bellows-shaped metal cylinder part whose outer peripheral part undulates and a stainless steel mesh band that covers the outer peripheral part of the metal cylinder part. The undulation state of the metal cylinder portion is configured to become denser as it goes from the connection end side of the piping network toward the connection end side of the main pipe.
For this reason, there is an advantage that a high frequency component with a short amplitude can be satisfactorily absorbed on the connecting end side of the main pipe in the metal cylinder portion among the vibrations caused by an earthquake or the like. And since the metal cylinder part of a flexible joint is nonflammable, it corresponds to the requirements on fire prevention measures similarly to Claim 2.

(About claim 4)
The flexible joint is composed of a bellows-shaped metal cylinder part whose outer peripheral part undulates and a stainless steel mesh band that covers the outer peripheral part of the metal cylinder part. The undulating state of the metal cylinder part is configured so that the center part is denser than the both end parts.
For this reason, there is an advantage that a high frequency component with a short amplitude can be satisfactorily absorbed by the central portion of the metal cylinder portion among the vibrations caused by an earthquake or the like. And since the metal cylinder part of a flexible joint is nonflammable, it corresponds to the requirements on fire prevention measures similarly to Claim 2.

(About Claim 5 and Claim 8)
The coating portion has a lining cloth tube that is impregnated with a liquid paint and can be reversed on the front and back sides. The liner layer is formed by moving the inner peripheral surface of the lining cloth pipe that is reversed on the front and back sides in the inverted direction while closely contacting the inner wall of the pipe in the inverted state.
For this reason, by moving the inside of the pipe while inverting the lining cloth pipe impregnated with the paint, the inner peripheral surface of the lining cloth pipe is in close contact with the inner wall of the pipe, and the liner layer is uniformly formed with a uniform thickness. be able to.

(About Claim 6 and Claim 9)
The coating part is moved forward and backward in the pipe and moved in the same direction along the axial direction of the pipe by the driving pressure supplied into the pipe, and the first moving body and the second moving body to which the paint is supplied Consists of. When the first moving body and the second moving body move in the pipe by the driving pressure, the second moving body presses the coating material and presses the coating material against the inner wall portion of the piping at the outer peripheral portion of the second moving body. .
For this reason, the outer peripheral part of the second moving body works as a spatula for spreading the paint while spreading it, and uniformly and uniformly applies to the inner wall part of the pipe. As a result, a simple operation of moving the first moving body and the second moving body in the pipe by adjusting the feeding of the cable body is possible while enabling coating with high quality and reliability.

(About claim 7)
In the piping lining method, the piping network is provided on the indoor side of the building and receives miscellaneous drainage. The main pipe is provided on the outdoor side and connected to a pipe network. The inner wall of the pipe is painted by moving the coating section in the pipe having the pipe network and the main pipe. In the painting process, the piping network and the main pipe are cut and separated, and then the piping is painted. In the connecting step, the cut and separated piping network and the main pipe are connected by a cylindrical flexible joint. The flexible joint absorbs the difference between the shaking of the pipe network and the shaking of the main pipe that occur during an earthquake or the like.

In this piping lining method, the piping network and the main pipe are cut and separated when applying the coating to the piping as in the first aspect. Therefore, when applying both the piping network and the main pipe, Painting can be done in parallel.
For this reason, the workability of the painting is rational, and it takes a short time, which is advantageous in terms of cost and improves the workability. When there is no need to paint the pipe network or when the pipe network is newly replaced, only the main pipe needs to be painted, and the painting work can be completed more efficiently in a shorter time. The same applies when painting only the piping network.

  In the present invention, when painting is applied to the piping, painting can be performed on the outdoor main pipe and the indoor piping network in parallel, thereby improving workability. The cut main pipe and the pipe network are connected by a flexible joint. For this reason, even if an earthquake or the like occurs, seismic rehabilitation that prevents cracks at the connection between the main and the pipe network and breakage at the corroded portion is realized.

  1 to 5 show a first embodiment of the present invention. FIG. 1 is an example of lining construction in a drainage piping system of a building H, and has a vertical drain pipe 1, a sewage main pipe 2 and a miscellaneous drainage main pipe 3 communicating with an external dredger 5 as pipes. From the miscellaneous drainage main pipe 3, an indoor horizontal pipe 4 communicating with each floor 1F to 12F is provided.

  As shown in FIG. 2, a pipe network 6 having a kitchen drain port 6b, a wash surface drain port 6c, a laundry drain port 6d, and a bathroom drain port 6e on one end side is used as the piping in the indoor horizontal pipe 4 of each floor 1F to 12F. Provided. Prior to the lining construction of the piping network 6, the piping network 6 is cleaned together with the ventilation pipe 1, the sewage main pipe 2 and the miscellaneous drainage main pipe 3, and the deposits such as rust and scale that have flowed down are externally attached 5 To universal piping rehabilitation vehicle (VacL machine) Va (see arrows A, B, C, D).

After cleaning, coating is applied as a liner layer 7 to the inner wall 3a of the drainage main pipe 3 and the inner wall 6a of the pipe network 6 by a lining method using a pipe lining apparatus (see FIG. 2). The paint is a liquid containing a coloring pigment or an epoxy resin. The lining cloth tube 10 is made of a flexible woven fabric containing glass fibers and chemical fibers such as polyethylene, and constitutes a toughness cloth having excellent durability and durability as a coating portion.
The lining cloth pipe 10 has an outer diameter that can be arbitrarily set within a range of 1 to 4 mm in thickness, and the outer diameter becomes a dimension according to the inner diameter of the miscellaneous drainage main pipe 3 and the pipe network 6. It is set so that it can be reversed on both sides by impregnating.

  The lining cloth tube 10 impregnated with the paint is wound around a winding portion (not shown) of the reversing machine 14 via the cable body G with the outer peripheral portion covered with the resin tube 13. In the reversing operation in the painting process, the lining cloth pipe 10 is drawn out from the winding part, and the base end part of the lining cloth pipe 10 is turned over together with the resin tube 13 so as to be fitted into the miscellaneous drainage main pipe 3 or the piping network 6 ( FIG. 2 shows an example in which the lining cloth pipe 10 is fitted into the miscellaneous drainage main pipe 3).

One end portion of the rope body G is tied to the distal end portion of the resin tube 13 covering the lining cloth tube 10 via the resin tube 13. The length of the resin tube 13 is set slightly longer than the length of the lining cloth tube 10.
In the pressure application step, the lining cloth pipe 10 is moved in the depth direction of the miscellaneous drainage main pipe 3 and the pipe network 6 while being sucked by the driving pressure of the pump Pm. Accordingly, the tip of the lining cloth tube 10 is firmly pressed against the inner peripheral surface of the piping network 6. When the resin tube 13 is peeled off from the lining cloth tube 10 via the cord body G, the lining cloth tube 10 is held in a state of being firmly pressed as the liner layer 7 against the inner wall 6a of the pipe network 6.

  The resin tube 13 mainly presses the lining cloth tube 10 in order to prevent dripping of the paint. The resin tube 13 is not limited to one layer and may be covered over a plurality of layers. The driving pressure supplied to the miscellaneous drainage main pipe 3 and the pipe network 6 may be generated by operating the blower or the universal pipe rehabilitation vehicle Va in FIG. 1 instead of the pump Pm.

  A remote control camera (not shown) is arranged from the reversing machine 14 to the lining cloth tube 10, and the lining cloth tube 10 is fed out to the miscellaneous drainage main pipe 3 and the piping network 6 depending on the amount of movement of the striated body G. Can be monitored by a monitor (not shown).

  When such coating is actually applied to the outdoor drainage main pipe 3 and the indoor piping network 6, as shown by a two-dot chain line in FIG. 3, the connecting portion between the branch pipe 15 and the piping network 6. 16 is cut and separated. Thereafter, the inner wall 3a of the miscellaneous drainage main pipe 3 is coated by the lining cloth pipe 10 fed out from the reversing machine 14 as described above.

  At this time, the opening 15 a for communication between the miscellaneous drainage main pipe 3 and the branch pipe 15 is closed by the lining cloth pipe 10. For this reason, a hole saw (not shown), which is a dedicated tool, is inserted from the branch pipe 15 side, and the opening 15a is reproduced by cutting off the closed portion with the hole saw. The inner wall 15b of the branch pipe 15 is also reproduced by an appropriate method. Coating is applied as a liner layer 7.

  In parallel with this operation, the piping network 6 is coated by the above-described lining cloth tube 10, and the coating of the drainage main pipe 3 and the piping network 6 is finished. Thereafter, the branch pipe 15 of the miscellaneous drainage main pipe 3 and the pipe network 6 are connected using the flexible joint 17 shown in FIG. 4 (connection process).

  The flexible joint 17 includes a bellows-shaped metal cylinder portion 17a whose outer peripheral portion undulates and a stainless steel mesh band 17b that covers the outer peripheral portion of the metal cylinder portion 17a. The undulating state of the metal cylinder portion 17a is an aspect in which the ridges 17c are arranged in parallel at equal intervals from the connection end side 15A of the branch pipe 15 toward the connection end side 6A of the piping network 6.

  Ring-shaped socket portions 18 and 19 are fixed to the left and right open ends of the flexible joint 17. In the connecting step, as shown in FIG. 5, the socket portion 18 of the flexible joint 17 is liquid-tightly fitted to the connecting end side 15 </ b> A of the branch pipe 15, and the other socket portion 19 is connected to the connecting end of the piping network 6. Fits side 6A in a fluid-tight manner. After the connection work by the flexible joint 17 is finished, the painting work for the main drainage pipe 3 and the pipe network 6 is completed.

  In the above configuration, when painting the piping network 6 and the miscellaneous drainage main pipe 3, the piping network 6 and the miscellaneous drainage main pipe 3 are cut and separated, so that both can be coated at the same time. For this reason, the workability of the painting is rational, and it takes a short time, which is advantageous in terms of cost and improves the workability. When there is no need to paint the pipe network 6 or when the pipe network 6 is newly replaced, it is sufficient to paint only the miscellaneous drainage main pipe 3, and the painting work can be completed more efficiently in a shorter time. The same applies to the case where only the piping network 6 is coated.

After painting, the piping network 6 and the branch pipe 15 of the miscellaneous drainage main pipe 3 are connected by the flexible joint 17, so The difference can be absorbed by the flexible joint 17. For this reason, the seismic rehabilitation which prevents the crack in the branch pipe 15 which is a connection part of the miscellaneous drainage main pipe 3 and the piping network 6, and the fracture | rupture in a corrosion part is implement | achieved.
Along with this seismic rehabilitation, the drainage function in the washing machine, washroom, bathtub, and kitchen around the room is well maintained. As a result, as an earthquake or the like stops, there is a convenience that can be continued as usual without interrupting daily living.

Accompanying the earthquake rehabilitation by the flexible joint 17, it becomes easy to promote the customer's willingness to construct with the added value of the seismic rehabilitation, which is advantageous in spreading and expanding the painting-related business.
Further, if the pipe network 6 and the branch pipe 15 of the miscellaneous drainage main pipe 3 are connected by a joint pipe of the same quality as these, the connection structure of the joint pipe to the pipe network 6 and the branch pipe 15 is caused by aging and the like. Deviation may occur, unexpected stress may be applied locally, and the connection structure may become unstable.
However, since the misalignment with respect to the pipe network 6 and the branch pipe 15 is absorbed by the flexible joint 17, local stress is not applied to these connection structures, and a stable connection structure can be maintained over a long period of time. it can.

FIG. 6A shows Example 2 of the present invention.
In Example 2, the undulating state of the metal cylinder part 17a in the flexible joint 17 is an aspect in which the concavo-convex ridges 17c are arranged more closely in parallel to both ends as compared to the central part.
For this reason, there is an advantage that among the vibrations caused by an earthquake or the like, particularly, a high frequency component with a short amplitude can be satisfactorily absorbed at both end portions of the metal tube portion 17a. And since the metal cylinder part 17a of the flexible joint 17 is nonflammable, it meets the requirements on fire prevention measures.

FIG. 6B shows Example 3 of the present invention.
In the third embodiment, the undulating state of the metal cylinder portion 17a in the flexible joint 17 is a mode in which the concavo-convex portion 17c is arranged more closely in parallel toward the connection end side 15A of the branch pipe 15 from the connection end side 6A of the pipe network 6. It is.
For this reason, there is an advantage that among vibrations caused by an earthquake or the like, a high frequency component with a short amplitude can be satisfactorily absorbed by the connecting end side 15A of the branch pipe 15 in the metal cylinder portion 17a. Moreover, since the metal cylinder portion 17a of the flexible joint 17 is nonflammable, it meets the requirements for fire prevention measures as in the second embodiment.

(C) of FIG. 6 shows Example 4 of this invention.
In Example 4, the undulation state of the metal cylinder part 17a in the flexible joint 17 is an aspect in which the concave and convex ridges 17c are arranged closer to each other at the central part than at both ends.
For this reason, there is an advantage that a high frequency component with a short amplitude can be satisfactorily absorbed by the central portion of the metal tube portion 17a among the vibrations caused by an earthquake or the like. Moreover, since the metal cylinder portion 17a of the flexible joint 17 is nonflammable, it meets the requirements for fire prevention measures as in the second embodiment.

FIG. 7 shows a fifth embodiment of the present invention.
In the fifth embodiment, when the miscellaneous drainage main pipe 3 and the pipe network 6 are coated, a parabola-like shape knitted from a plastic fiber such as polyethylene or vinyl chloride, a woven fabric, or the like, in place of the lining cloth pipe 10, is freely deflated and deformed. The first moving body 20 and the second moving body 21 are used. The shape of the first moving body 20 and the second moving body 21 is a shopping bag shape such as a shop, a hood shape, a drawstring shape, a dome shape, a hemispherical shape, a spire shape, a drum shape, a warhead shape, a shell shape, a finger sack shape, It may be a helmet shape, a cone shape, a windsock shape, a trumpet shape, a bell shape, a stocking shape, a saddle shape, a nose column shape or a wedge shape. The point is that the liner layer 7 can be formed by advancing into the coating material S, spreading the coating material S and pressing the coating material S against the inner walls 3a, 6a.

  The first moving body 20 and the second moving body 21 are connected by a control rope 22 at a predetermined interval. As the rope body G is fed out, the following second moving body 21 is processed in the process in which the preceding first moving body 20 and the following second moving body 21 travel in the miscellaneous drainage main pipe 3 (piping network 6). Is displaced in the direction approaching the preceding first moving body 20 by the piston action, and the paint S is pressed and pushed out from the outer peripheral portion of the succeeding second moving body 21.

  Accordingly, the outer peripheral portion of the subsequent second moving body 21 spreads the paint S on the inner wall 3a of the miscellaneous drainage main pipe 3 (inner wall 6a of the piping network 6), and the liner layer 7 having a predetermined thickness is uniformly formed.

  Note that only one of the first moving body 20 and the second moving body 21 may be used. In this case, as the rope body G is unwound, the outer peripheral portion of the moving body spreads the paint S on the inner wall 3a of the miscellaneous drainage main pipe 3 (the inner wall 6a of the piping network 6), and these inner walls 3a (6a ) To form the liner layer 7 having a predetermined thickness evenly. In FIG. 7, spherical balls 20a and 21a are arranged in the first moving body 20 and the second moving body 21, but may be omitted if unnecessary.

(Modification)
(A) In Example 1, the drainage main pipe 3 was coated with the lining cloth pipe 10, and then a hole saw was inserted from the branch pipe 15 to cut off the closed portion of the lining cloth pipe 10, but the lining cloth pipe 10 In addition, a communication opening that matches the opening 15 a of the branch pipe 15 may be formed in advance.
That is, the arrival dimension from the inlet of the miscellaneous drainage main pipe 3 to the opening 15a of the branch pipe 15 is measured, and the opening for communication is provided at a position corresponding to the arrival dimension from the inlet of the lining cloth pipe 10. Is provided. Thereby, as the reversing operation of the lining cloth tube 10 proceeds, the opening portion of the lining cloth tube 10 matches the opening portion 15a of the branch tube 15 without excess or deficiency. For this reason, it is not necessary to use a hole saw when painting the miscellaneous drainage main 3, and the work efficiency is greatly improved.

(B) The 1st moving body 20 and the 2nd moving body 21 in Example 5 are not restricted to a parabola-like thing, A spherical body, a truncated cone body, a cylindrical body, etc. may be sufficient. The point is that the coating material can be pressed against the inner wall as it moves through the pipe. When only one of the first moving body 20 and the second moving body 21 is used, a spherical ball (single or plural) may be connected to the rear of the moving body.
The second moving body 21 may be a bowl-shaped, brown tube-shaped, conical, abacus bead-shaped, cup-shaped, hemispherical painted portion, or a parabolic mesh structure, and paint is applied to the outside through the mesh gap. You may make it discharge | emit to. In short, as long as it is a coating portion that can form a liner layer 7 by applying a paint to its inner wall when painting a pipe, any currently known tool can be applied regardless of the type of tool and method of construction.
Among these tools and methods, air is pumped into the piping with a compressor, etc., and suction is applied to the piping with a pump, etc., or a solid object such as a ball is moved along the piping to paint, and Includes a centrifugal coating device that rotates the spray nozzle in the pipe to paint.
(C) In the first embodiment, the lining cloth pipe 10 is used for both the piping network 6 and the miscellaneous drainage main pipe 3, but for the piping network 6, the first moving body 20 and the second moving body 21 in the shape of an umbrella are used. You may make it give the liner layer 7 using.

(D) As the metal cylinder part 17a of the flexible joint 17, what was formed with nonflammable materials, such as iron, brass, stainless steel, copper, or bronze, may be used.
(E) The piping network 6 may be applied not only to drain pipes but also to air conditioning ducts and exhaust ducts (industrial ducts, kitchen ducts).

It is a schematic longitudinal cross-sectional view which shows the lining construction example of piping used as the object of coating (Example 1). It is a general view of the piping network which performs coating (Example 1). (Example 1) which is an expanded longitudinal sectional view which shows the connection state of the miscellaneous drainage main pipe before painting, and a piping network. It is an expanded longitudinal cross-sectional view which shows the miscellaneous drainage main pipe after painting, a piping network, and a flexible joint (Example 1). It is an expanded longitudinal cross-sectional view which shows the state which connects the miscellaneous drainage main pipe and piping network after a coating by a flexible joint (Example 1). (A), (B), and (C) are enlarged side views of a flexible joint (Example 2, Example 3, and Example 4). It is a schematic longitudinal cross-sectional view which shows the lining construction example of piping used as the object of coating (Example 5).

Explanation of symbols

1 Vent pipe (pipe)
2 Sewage main (piping)
3 Miscellaneous drainage main (pipe)
3a inner wall 4 indoor horizontal pipe (pipe)
6 Piping network (piping)
6A Connection end side of piping network 6a Inner wall 7 Liner layer 10 Lining cross pipe (painted part)
DESCRIPTION OF SYMBOLS 13 Resin tube 15 Branch pipe 15A The connection end side of a branch pipe 15a Opening part 17 Flexible joint 17a Metal cylinder part 17b Mesh band 17c Concavity and convexity part 20 1st moving body 21 2nd moving body 22 Control rope G Line body S paint

Claims (9)

The inner wall of the pipe is moved by moving the coating portion into a pipe having a pipe network provided on the indoor side of the building for receiving miscellaneous drainage and a main pipe provided on the outdoor side and connected to the pipe network. In piping lining equipment for painting,
A pipe-shaped flexible joint used for connecting the cut and separated pipe network and the main pipe when coating the pipe;
A piping lining apparatus characterized in that the flexible joint absorbs the difference between the shaking of the piping network and the shaking of the main pipe that occur during an earthquake or the like.   The flexible joint is composed of a bellows-shaped metal tube portion whose outer peripheral portion undulates and a stainless steel mesh band covering the outer peripheral portion of the metal tube portion, and the undulating state of the metal tube portion is a central portion. The piping lining device according to claim 1, wherein the piping lining device is configured so as to be denser toward both ends.   The flexible joint includes a bellows-shaped metal cylinder portion whose outer peripheral portion undulates and a stainless steel mesh band that covers the outer peripheral portion of the metal cylinder portion, and the undulation state of the metal cylinder portion is the pipe. The piping lining device according to claim 1, wherein the piping lining device is configured so as to become denser from a connecting end side of a net toward a connecting end side of the main pipe.   The flexible joint is composed of a bellows-shaped metal cylinder part whose outer peripheral part undulates and a stainless steel mesh band covering the outer peripheral part of the metal cylinder part, and the undulation state of the metal cylinder part is at both end parts. The piping lining device according to claim 1, wherein the piping lining device is configured to be denser toward a center portion than to the side.   The coating portion has a lining cloth tube that is impregnated with a liquid paint and can be reversed on the front and back sides, and the inner surface of the lining cloth tube that is reversed on the front and back surfaces is in an inverted state while closely contacting the inner wall of the pipe. 2. The pipe lining device according to claim 1, wherein the liner layer is formed by moving in a depth direction of the pipe. The painted part is
From the first moving body and the second moving body, which are moved in the same direction along the axial direction of the pipe and are supplied with paint by the driving pressure which is arranged in the pipe before and after and is supplied into the pipe. Become
When the first moving body and the second moving body move in the pipe by the driving pressure, the second moving body presses the paint, and the paint is applied to the outer periphery of the second moving body. 2. The piping lining device according to claim 1, wherein the piping lining device is applied by being pressed against an inner wall portion of the piping. The inner wall of the pipe is moved by moving the coating part into a pipe having a pipe network that is provided on the indoor side of the building and receives miscellaneous drainage and a main pipe that is provided on the outdoor side and connected to the pipe network. In the piping lining method with the process of painting,
When painting the pipe, a painting process of cutting and separating the pipe network and the main pipe and then painting the pipe;
A connection step of connecting the cut and separated pipe network and the main pipe with a cylindrical flexible joint;
A piping lining method characterized in that the flexible joint absorbs the difference between the shaking of the piping network and the shaking of the main pipe that occur during an earthquake or the like.   The coating portion has a lining cloth tube that is impregnated with a liquid paint and can be reversed on the front and back sides, and the inner surface of the lining cloth tube that is reversed on the front and back surfaces is in an inverted state while closely contacting the inner wall of the pipe. The pipe lining method according to claim 7, wherein the liner layer is formed by moving in a depth direction of the pipe. The painted part is
From the first moving body and the second moving body, which are moved in the same direction along the axial direction of the pipe and are supplied with paint by the driving pressure which is arranged in the pipe before and after and is supplied into the pipe. Become
When the first moving body and the second moving body move in the pipe by the driving pressure, the second moving body presses the paint, and the paint is applied to the outer periphery of the second moving body. 8. The pipe lining method according to claim 7, wherein the pipe lining is applied by being pressed against an inner wall portion of the pipe.

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