JP4841962B2 - Piping lining method - Google Patents

Description

  The present invention relates to a pipe lining apparatus and a pipe lining method used for applying paint to pipes such as buried pipes, drain pipes and water supply pipes after cleaning.

  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 placed inside and outside the building, forming scale substances with rust. is doing. In order to remove the odor and restore the function of the pipe, the pipe is periodically cleaned using a cleaning device to completely remove the scale material adhering to the pipe. After cleaning the pipe, in order to recover and rehabilitate the hygiene and durability of the pipe, a coating with a predetermined thickness is applied in a layer form in the pipe by a lining device (see, for example, Patent Document 1).

As shown in FIG. 9 as an example, the lining device of Patent Document 1 has a lining cloth tube 50 that can be turned upside down connected to a cable body 51 together with a resin tube 49. As the driving pressure is supplied into the pipe 52 and the ridge body 51 is fed out, the liner layer is moved in the depth direction while the inner peripheral surface of the lining cloth pipe 50 reversed to the front and back is brought into close contact with the inner wall of the pipe 52. 53 is formed.
JP 2004-291605 A

In this lining device, when the branch pipe 54 is connected to the pipe 52 as another pipe, the communication port 54 a through which the pipe 52 and the branch pipe 54 communicate with each other is blocked by the lining cloth pipe 50.
For this reason, it is necessary to insert a cutting tool (not shown) into the branch pipe 54 and cut out a portion that closes the communication port 54a of the lining cloth pipe 50 to open the opening. Since the branch pipe 54 is small in diameter, it is necessary to remotely operate the cutting tool to open the opening, and even a skilled worker has the disadvantage that labor and time are required and the workability of coating is lowered.

  The present invention has been made in view of the above circumstances, and its purpose is to form an opening in a lining cloth pipe in advance, so that the opening joins the pipe and another pipe along with the reversing operation thereof. Because it communicates in position, it is not necessary to cut out the opening of the lining cloth pipe with a cutting tool after painting, and the piping lining that improves the workability significantly because the painting work is efficiently performed in a short time by rational labor saving. It is to provide an apparatus and a piping lining method.

(About claim 1)
In the piping lining method , a lining cloth pipe that is impregnated with liquid paint and can be turned over on both sides is pressed with the feeding operation of the striated body, and the inner circumferential surface of the lining cloth pipe that is turned upside down is applied to the inner wall of the pipe. While in close contact, the liner layer is formed by moving in the depth direction of the pipe in an inverted state. The pipe is connected at a joining position where it joins another pipe, and an opening corresponding to the joining position is formed in advance in the lining cloth pipe . Thereby, in the process of moving the lining cloth pipe in the pipe, the opening communicates with another pipe at the joining position.

  As the reversing operation of the lining cloth pipe proceeds, the opening of the lining cloth pipe communicates with other pipes at the merging position, so it is not necessary to cut open the lining cloth pipe with a cutting tool after painting. With labor saving, painting work can be performed efficiently in a short time, and workability can be greatly improved.

(Attached to the claim 2)
The resin tube is slightly longer than the lining cloth tube, covers the outer periphery of the lining cloth tube, and is inverted together with the lining cloth tube. The resin tube is configured to press the inner wall of the pipe a tip opening of the lining cloth tube upon termination of the paint, the pull-out operation of the rope member, provided so as to peel off from the inner periphery of the lining cloth tube ing.
At this time, the resin tube prevents dripping of the paint and presses the inverted lining cloth pipe against the inner wall of the pipe, so that the lining cloth pipe adheres to the inner wall of the pipe evenly and closely and forms a good liner layer. Contribute to.

(Claim 3)
The lining cloth tube is wound around a wire by a manual reel, and is drawn out together with the wire by suction pressure during coating, and is reversed and moved in the pipe.
By using a manual reel, the lining cloth tube can be fed out with a simple structure and in an advantageous cost.

(About claim 4)
When the opening of the lining cloth pipe communicates with another pipe at the merging position, a pressure sensing part is provided for detecting a change in the internal pressure of the pipe. It has a determination part which detects whether the output received from this pressure sensing part is more than predetermined value. The determination unit actuates when the decision on the output equal to or higher than a predetermined value, and a notification unit to alert the user to the communicating pipe. Thereby, the operator is informed that the opening communicates with another pipe at the joining position, and it is easy to advance the painting work, which can contribute to the efficiency of the work .

(Claim 5)
Lining cloth tube is made of flexible fabric including a chemical fiber fiberglass or polyethylene. For this reason, the lining cloth pipe becomes a toughness cloth that is robust and excellent in durability, and can be used repeatedly over a long period of time.

  In the present invention, by forming an opening in the lining cloth tube in advance, the opening communicates with the merging position between the pipe and the other pipe as the lining cloth pipe is reversed. For this reason, it is not necessary to cut the lining cloth tube with a cutting tool after painting, and the painting work is efficiently performed in a short time by rational labor saving, and the workability is greatly improved.

  1 to 3 show a first embodiment 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. 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, the indoor horizontal pipe 4 of each floor 1F to 12F has a pipe network 6 having a kitchen drain 6b, a wash drain 6c, a laundry drain 6d and a bathroom drain 6e on one end side as shown in FIG. Provided. Prior to 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. It is recovered by a pipe rehabilitation vehicle (VacL machine) Va (see arrows A, B, C, D).

FIG. 3 shows a lining method in which the inner wall 6a of the pipe network 6 is coated as a liner layer 7 after cleaning. 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 that is robust and excellent in durability.
This lining cloth pipe 10 has an outer diameter that can be arbitrarily set within a range of 1 to 4 mm in thickness, and this outer diameter becomes a dimension according to the inner diameter of the pipe network 6 and is impregnated with a paint on the front and back sides. It is set so that it can be reversed.

The lining cloth tube 10 impregnated with the paint is wound around the winding portion 18a of the reversing machine 18 via the striated body G inserted through the pressure feeding tube 20 with the outer peripheral portion covered with the resin tube 13. ing.
In the reversing step, the lining cloth tube 10 is drawn out from the winding portion 18 a, and the base end portion of the lining cloth tube 10 is turned over together with the resin tube 13 so as to be fitted into the piping network 6.

One end portion G1 of the rope body G is connected to the distal end portion of the resin tube 13, and this distal end portion is releasably fitted and connected to the distal end opening portion 10A of the lining cloth tube 10. The length of the resin tube 13 is set slightly longer than the length of the lining cloth tube 10. As a result, as will be described later, when the distal end portion of the resin tube 13 protrudes from the distal end opening portion 10A of the lining cloth tube 10, the resin tube 13 firmly presses the distal end opening portion 10A against the inner wall 6a of the piping network 6. I am doing so.
In the pressure application step, a moving force in the depth direction of the piping network 6 is applied to the lining cloth tube 10 by the driving pressure of the blower 31, and the lining cloth tube 10 is pressed (see arrow M in FIG. 3).

  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. As for the driving pressure supplied to the piping network 6, the pump Pm and the universal piping rehabilitation vehicle Va of FIG. 2 may be operated instead of the blower 31 to apply suction pressure to the piping network 6.

  A remote control camera (not shown) is arranged from the reversing machine 18 to the lining cloth tube 10, and the feeding mode of the lining cloth tube 10 with respect to the piping network 6 can be monitored by the monitor P according to the amount of movement of the rope body G. It is like that.

In this case, a branch pipe 11 is connected to the pipe network 6 as another pipe. An opening 10 </ b> B communicating with the branch pipe 11 is formed in the lining cloth pipe 10 in advance at a joining position 11 </ b> A where the pipe network 6 joins the branch pipe 11.
That is, the arrival dimension from the inlet 6z of the piping network 6 to the joining position 11A is measured, and the opening 10B is provided at a position corresponding to the arrival dimension from the inlet 10z of the lining cloth pipe 10. The opening 10 </ b> B has a diameter T equivalent to the diameter W at the joining position 11 </ b> A of the branch pipe 11. As a result, as the reversing operation of the lining cloth tube 10 proceeds, the opening 10B of the lining cloth tube 10 matches the merging position 11A of the branch tube 11 without excess or deficiency.

  In the moving step, the inner circumferential surface of the lining cloth pipe 10 that is reversed upside down is moved in the depth direction of the piping network 6 in a reversed state while being in close contact with the inner wall 6 a of the piping network 6. Along with this, the resin tube 13 protrudes from the tip opening 10A of the lining cloth tube 10 and strongly presses the tip opening 10A against the inner wall 6a of the piping network 6. In the curing step, hot air generated by a boiler, a pressure feeding device (not shown) or the like is sent to the piping network 6 to dry and cure the lining cloth tube 10.

  Thus, the liner layer 7 (for example, with a thickness of about 2 to 3 mm) is formed in which the lining cloth tube 10 impregnated with the paint is turned upside down and is in close contact with the inner wall 6a of the pipe network 6. At the end of the lining construction, the connection of the tip opening 10A of the lining cloth tube 10 to the resin tube 13 can be released. At this time, the strip body G is wound around the winding portion 18a, and the resin tube 13 is peeled off from the inner peripheral portion of the liner layer 7 and pulled out of the pipe network 6 (see arrow N in FIG. 3). In this state, as shown by a two-dot chain line in FIG. 3, the tip opening 10A of the lining cloth tube 10 becomes free as a reverse end and is in close contact with the terminal opening 6A of the piping network 6.

  Thus, when performing the lining construction, the inner circumferential surface of the lining cloth pipe 10 is brought into close contact with the inner wall 6a of the piping network 6 by applying driving pressure to the piping network 6 and moving the lining cloth pipe 10 while inverting it. Thus, the uniform liner layer 7 is formed. For this reason, cracks, seams, pinholes, corrosion holes, and the like are completely closed by the construction of the liner layer 7, and rehabilitation repair is performed on the piping network 6.

In the configuration described above, the opening 10B having the diameter T equal to the diameter W at the joining position 11A of the branch pipe 11 is formed in the lining cloth at a position where the lining cloth pipe 10 matches the joining position 11A of the branch pipe 11 without excess or deficiency. The tube 10 is formed in advance.
For this reason, as the reversing operation of the lining cloth tube 10 proceeds, the opening 10B of the lining cloth tube 10 communicates with the branch tube 11 at the joining position 11A. As a result, there is no need to open the lining cloth tube 10 with a cutting tool after painting, and the painting work can be efficiently performed in a short time by rational labor saving, and workability can be greatly improved.

FIG. 4 shows a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that, in addition to the branch pipe 11, two branch pipes 21 and 22 are formed at different positions in the pipe network 6.
The lining cloth pipe 10 is formed with openings 10C and 10D so as to match the joining positions 21A and 22A of the branch pipes 21 and 22 in accordance with the reversing operation thereof {in FIG. Dotted line, see solid line in (b) of the figure}. Even when a plurality of branch pipes 11, 21, and 22 exist as in the second embodiment, the same effects as in the first embodiment can be obtained.

  FIG. 5 shows a third embodiment of the present invention. The difference between the third embodiment and the first embodiment is that a Y-shaped tube 6M including three branch tubes 6m, 6n, and 6p is provided. The lining cloth pipe 10 is formed with an opening 10E that matches the joining position 6q of the branch pipe 6n as the reversing operation proceeds (see FIGS. 5A and 5B). When applied to the Y-shaped tube 6M having the branch pipes 6m, 6n, and 6p as in the third embodiment, the same effect as in the first embodiment can be obtained.

  FIG. 6 shows a fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment in that the cross pipe 6K is formed by connecting the branch pipe 6N to the pipe network 6 in an orthogonal state. In the piping network 6, openings 10B formed on both sides of the lining cloth pipe 10 are set so as to coincide with the joining position 6s of the branch pipe 6N {see (a) of FIG. 6}.

  In the branch pipe 6N, the openings 10F formed on both sides of the lining cloth pipe 10 are set so as to coincide with the joining position 6t of the branch pipe 6N {see FIG. 6 (a)}. For this reason, after painting the piping network 6, the lining cloth pipe 10 that reverses the inside of the branch pipe 6 </ b> N has a painting configuration that penetrates the lining cloth pipe 10 in the piping network 6 through the opening 10 </ b> B {FIG. (B) Reference}. When applied to the cross tube 6K having the branch pipe 6N as in the fourth embodiment, the same effect as in the first embodiment can be obtained.

  FIG. 7 shows a fifth embodiment of the present invention. The fifth embodiment differs from the first embodiment in that a manual reel 25 is used in place of the reversing machine 18. For this reason, the wire 14 tied to the distal end portion 13 a of the resin tube 13 is wound around the winding wheel 25 a of the reel 25. At the time of painting, the wire 14 is unwound from the winding wheel 25 a by the suction pressure of the universal pipe rehabilitation vehicle Va in FIG. 1, and the lining cloth pipe 10 is reversed and moved in the pipe network 6.

  At the end of painting, the handle 25b is turned, the wire 14 is wound around the winding wheel 25a, and the resin tube 13 is collected. By using this manual reel 25, the lining cloth tube 10 can be fed out and the resin tube 13 can be wound and recovered with a simple structure and in an advantageous cost.

  FIG. 8 shows a sixth embodiment of the present invention. The sixth embodiment differs from the first embodiment in that when the opening 10B of the lining cloth pipe 10 communicates with the branch pipe 11 at the joining position 11A, the notification section 30 is turned on or off by a change in the internal pressure of the piping network 6. It is made to operate as.

In other words, a pressure sensitive unit 33 that detects a change in the internal pressure of the piping network 6 is provided as a pressure sensitive sensor. It has the determination part 32 which detects whether the output received from this pressure sensing part 33 is more than predetermined value. When the determination unit 32 determines that the output is equal to or greater than a predetermined value, the notification unit 30 is activated.
When the opening 10 </ b> B of the lining cloth pipe 10 communicates with the branch pipe 11 at the joining position 11 </ b> A, the internal pressure of the piping network 6 rapidly decreases, so that the notification unit 30 is activated via the pressure sensing unit 33 and the determination unit 32. Thus, the operator is informed that the opening 10B of the lining cloth pipe 10 communicates with the branch pipe 11 at the joining position 11A, and the painting work is facilitated to contribute to the work efficiency.

(Modification)
(A) The application target of the present invention is not limited to the branch pipe 11, the Y-shaped pipe 6 </ b> M, and the cross-shaped pipe 6 </ b> K as long as there is a joining position formed by connecting a plurality of pipes.
(B) In the lining cloth pipe 10, the tip opening portion 10A to be brought into close contact with the end opening portion 6A of the pipe network 6 is provided, but a tip closing portion may be used instead of the tip opening portion 10A.
(C) As the piping network 6, not only a drain pipe but also an air conditioning duct or an exhaust duct (industrial duct, kitchen duct) may be applied.

  In the present invention, by forming an opening in the lining cloth pipe in advance, the opening communicates with the merging position of the pipe and the other pipe as the lining cloth pipe is reversed. For this reason, it is not necessary to cut the lining cloth tube with a cutting tool after painting, and the painting work is efficiently performed in a short time due to labor saving. The demand from plumbers focusing on efficient workability increases, and it can be widely applied to the chemical and mechanical industries 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 coating (Example 1). It is a general view of the piping network which performs coating (Example 1). (A) is a longitudinal cross-sectional view which shows the aspect which constructs a lining cloth pipe in the piping network which has a branch pipe, (b) is a longitudinal cross-sectional view which shows the connection of a piping network and a branch pipe (Example 1). . (A) is a longitudinal cross-sectional view which shows the aspect which constructs a lining cloth pipe in the piping network to which the several branch pipe was connected, (b) is a longitudinal cross-sectional view which shows the connection of a branch pipe and a piping network (implementation) Example 2). (A) is a longitudinal cross-sectional view which shows the aspect which constructs a lining cloth pipe | tube in a Y-shaped pipe, (b) is a longitudinal cross-sectional view which shows the connection of branch pipes (Example 3). (A) is a longitudinal cross-sectional view which shows the aspect which constructs a lining cross pipe in a cross pipe, (b) is a longitudinal cross-sectional view which shows the connection of a piping network and a branch pipe (Example 4). (Example 5) which is a perspective view which shows the aspect which pays out a lining cloth pipe | tube with a reel. (Example 6) which is a longitudinal cross-sectional view which shows the aspect which constructs a lining cloth pipe | tube in the piping network which has a branch pipe. It is a longitudinal cross-sectional view which shows the aspect which constructs the conventional lining cloth pipe.

Explanation of symbols

1 Vent pipe (pipe)
2 Sewage main (piping)
3 Miscellaneous drainage main (pipe)
4 indoor horizontal pipe (pipe)
6 Piping network (piping)
7 Liner layer 10 Lining cross pipe 11, 21, 22, 6m, 6n, 6p, 6N Branch pipe (pipe)
10B, 10C, 10D, 10E, 10F Opening 11A, 6q, 6s, 6t Junction position 13 Resin tube 14 Wire 25 Manual reel 30 Notification unit 32 Judgment unit 33 Pressure sensing unit G Strip body G1 One end

Claims (5)

While pressing the lining cloth pipe impregnated with liquid paint and reversible on the front and back with the feeding operation of the striated body, while bringing the inner peripheral surface of the lining cloth pipe reversed on the front and back into close contact with the inner wall of the pipe, In the pipe lining method of forming a liner layer by moving in the depth direction of the pipe in an inverted state,
The pipe is connected at a merging position where it merges with other pipes, an opening corresponding to the merging position is formed in the lining cloth pipe in advance, and the lining cloth pipe is moved in the pipe, A pipe lining method comprising a step of communicating the opening with the other pipe at the joining position . It is slightly longer than the lining cloth pipe, covers the outer periphery of the lining cloth pipe, and reverses together with the lining cloth pipe, and the end opening of the lining cloth pipe is formed on the inner wall of the pipe as the paint ends. The piping lining method according to claim 1 , further comprising: a resin tube that is pressed and peeled off from an inner peripheral portion of the lining cloth pipe by an operation of pulling out the striated body . The lining cloth tube is wound through the wire by manual reels, at the time of coating, to claim 1, characterized in that the reverse moving is fed together with the wire by the suction pressure in the pipe The piping lining method described . When the opening of the lining cloth pipe communicates with the other pipe at the merging position, a pressure sensing part that detects a change in the internal pressure of the pipe, and whether the output received from the pressure sensing part is equal to or greater than a predetermined value a judging unit for detecting whether actuates when the determination unit determines the output equal to or higher than a predetermined value, according to claim 1, characterized in that it comprises a notification unit to alert the user to communication of said pipe Piping lining method. The lining cloth tube, pipe lining method according to claim 1, characterized in that it is a flexible fabric comprising a chemical fiber fiberglass or polyethylene.

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