JP4053808B2 - Rehabilitation of drainage branch pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for rehabilitating drainage branch pipes, and more specifically, for example, in a multi-storey apartment house such as an apartment, for example, the living water circulation of each floor connected to one drainage main pipe which is a shared drainage facility The present invention relates to a drainage branch rehabilitation method for renewing a dedicated drainage branch extending from the facility.
[0002]
[Prior art]
Conventionally, in middle- and high-rise apartments such as condominiums, the drainage pipes (drainage branch pipes in the exclusive areas of each floor) extending from living water facilities such as toilets, kitchens, and bathrooms on each floor are one drainage that is a shared water distribution facility. It is connected to the main pipe, and the domestic wastewater from each floor is gathered in this drain main pipe and drained into sewage or septic tanks. In other words, in middle- and high-rise apartments, etc., drainage branch pipes for each floor are connected to at least one drainage main pipe.
[0003]
Rehabilitation of such drainage branch pipes has not been carried out in the past because the shape of the drainage port is very complicated, the installation of temporary piping is difficult, and the construction period is limited. Recently, the inside of the drainage branch pipe is evacuated from the end of the drainage main pipe with a large suction device, the abrasive branch pipe in each floor exclusive part is sucked with air and abrasives and paint from the drain outlet, and the inner surface of the drainage branch pipe is polished and Techniques for painting have been proposed, and more specific construction techniques are being studied with the aim of practical application.
[0004]
[Problems to be solved by the invention]
However, in the conventional drainage branch rehabilitation method, as will be explained below, when the drainage pipe is clogged other than the original cleaning and inspection openings, it is unavoidable to open the floor and ceiling for cleaning. When a fastening cheese joint is used, it is difficult to sufficiently regenerate the plug fastening cheese joint, and there is a problem that corrosion proceeds from the plug fastening cheese joint even though the drainage branch pipe has been renewed. It was.
[0005]
That is, the plug fastening cheese joint inevitably provides a plug mounting screw or the like in a portion protruding sideways from the flow path, and thereby there is a dead space with respect to running water. Rehabilitation of drainage branch pipes in this area makes it difficult to rehabilitate sufficiently.
[0006]
An object of the present invention is to solve such a conventional problem. For example, in a multi-storey building such as an apartment, a drain branch pipe and a drain pipe dedicated plug connected to the drain branch pipe are provided. An object of the present invention is to provide a drainage branch rehabilitation method capable of sufficiently rehabilitating a stop cheese joint.
[0007]
[Means for Solving the Problems]
The present invention is a drainage branch rehabilitation method, and is configured as follows to solve the above-described technical problem. That is, the present invention regenerates a drainage branch pipe provided with a branch pipe connected to the drainage main pipe and a drainage pipe-dedicated cheese joint having a plug operable from the outside for cleaning or checking the branch pipe. In the method, the paint is sprayed from the tip of the spray nozzle device for painting disposed in the branch pipe or in the drainage pipe dedicated cheese joint to the plug side of the drainage pipe dedicated cheese joint. , Spraying the paint on the inner surface of the drainage pipe dedicated cheese joint, and simultaneously drawing the air inside the pipe from the lower end of the drainage main pipe, thereby painting the inner wall of the drainage pipe dedicated cheese joint, And a step of painting the inner wall of the branch pipe.
[0008]
According to this invention, since the paint is sprayed onto the inner wall by spraying the paint toward the plug side in the drainage pipe dedicated plug-stopping cheese joint, the plugging cheese joint dedicated to the drainage pipe is sufficiently renovated. After the drainage branch pipe is rehabilitated, it is possible to suppress the progress of corrosion from the drainage pipe dedicated cheese joint.
[0009]
Also, before the drain pipe exclusive plug fastening cheese joint and the branch pipe coating step, an abrasive blast nozzle is provided in the branch pipe or the drain pipe exclusive plug fastening cheese joint by mixing abrasive with compressed air From the tip of the apparatus, sprayed toward the plug side in the drain pipe dedicated plug fastening cheese joint, and sprayed the abrasive on the inner wall of the drain pipe dedicated plug joint cheese joint, at the same time, the lower end of the drain pipe main pipe By sucking the air inside the pipe from the plug, the deposits such as rust adhering to the inner wall of the drain pipe exclusive plug fastening cheese joint are removed and the inner wall is polished, and the inner wall of the branch pipe is polished. Process.
[0010]
In this case, if rust or the like is attached inside the drainage pipe plugging cheese joint, the abrasive is sprayed onto the inner wall of the drainage pipe plugging cheese joint and sprayed onto the inner wall. Therefore, it is possible to sufficiently rehabilitate the drain-pipe dedicated plug-stopping cheese joint.
[0011]
Further, the polishing blast nozzle device and the coating spray nozzle device can eject the abrasive and the paint in a direction inclined at a predetermined angle with respect to the inflow direction thereof. The paint can be reliably sprayed to the plug side in the drainage pipe dedicated plug stopper cheese joint.
[0012]
Moreover, the predetermined angle mentioned above can be made into about 45 degrees, and in this case, an abrasive and a coating material can be reliably sprayed also to the upper surface side of a drainage pipe exclusive plug stop cheese joint.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a drainage branch pipe rehabilitation method according to the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a flowchart showing a method for rehabilitating a drainage branch pipe of the present invention. In this rehabilitation method, first, the drain pipe dedicated plug stopper cheese joint is polished (step 1), and then the branch pipe is polished (step 2). Thereafter, the drain pipe dedicated plug-stopping cheese joint is painted (step 3), and finally the branch pipe is painted (step 4). It should be noted that either the drainage pipe-dedicated plug joint cheese joint or the branch pipe may be preceded by either one, or the coating may be preceded by either.
[0015]
Next, each process mentioned above is demonstrated. FIG. 2 shows a case where the private drainage branch pipes 11a, 11b... Connected to the drainage main pipe 10 installed in the multi-storey building are rehabilitated. The main drainage pipes 11a, 11b... Piped to the main pipe 10 and the exclusive portions of the respective floors connected thereto are schematically shown.
[0016]
FIG. 3 shows a case where the exclusive drainage branch pipe 11 a is piped in the ceiling 70. As can be seen from FIG. 3, the exclusive drainage branch pipe 11a includes a main branch pipe 12 directly connected to the drainage main pipe 10, a branch branch pipe 13 connected to the main branch pipe 12 and extending in the horizontal direction, and a main branch. It has a branch pipe 14, 15, 16 connected to the pipe 12 or the branch branch pipe 13 and extending in the vertical direction.
[0017]
Further, at the end of the main branch pipe 12, a drainage pipe dedicated cheese joint (hereinafter referred to as a "plugging cheese joint") 17 is connected to the exclusive drain branch pipe 11a. In the present embodiment, the toothpick pipe 14 is connected to the plug fastening cheese joint 17.
[0018]
Drain ports 18, 19, and 20 are connected to the upper ends of the branch pipes 14, 15, and 16, respectively. For example, when the building is a housing complex, the drainage port 18 is for kitchen drainage, the drainage port 19 is for bathroom drainage, the drainage port 20 is for wash drainage, and the like. 2 indicate connection points between the dedicated drainage branch pipes 11a, 11b,... And the drainage main pipe 10 on each floor.
[0019]
When rehabilitating the inner surfaces of the existing dedicated drainage branch pipes 11a, 11b, etc., as described above, the plug-type cheese joint 17 that has a complicated structure and is difficult to rehabilitate by the conventional method is first polished. And remove iron rust and dirt adhering to the inner surface.
[0020]
As shown in FIG. 2, the plugging cheese joint 17 is polished as shown in FIG. 2. The drainage port 18 of the toothpipe pipe closest to the cheese joint 17, here the toothpipe pipe 14 directly connected to the plugging cheese joint 17. From the above, the flexible supply hose 23 having the polishing blast nozzle device 22 attached to the tip thereof is inserted into the toothpipe 14 and placed in the plug fastening cheese joint 17. .
[0021]
The supply hose 23 extends from the drain outlet 18 of the vertical branch pipe 14 to the abrasive charging machine 25 and is connected to the inlet. A compressed air supply pipe 27 extending from the air compressor 26 is connected to the inlet.
[0022]
As shown in FIG. 4, the polishing blast nozzle device 22 includes a nozzle body 22a, an inlet 22b for connecting the supply hose 23, an outlet 22c for ejecting abrasive, and a hollow shape surrounding the nozzle body 22a. And a spherical cover 22d. The jet port 22c is inclined at a predetermined angle α with respect to the inflow port 22b. In the present embodiment, the angle α is set to approximately 45 °.
[0023]
As shown in FIG. 5, the polishing blast nozzle device 22 is disposed inside the cheese joint 17 via the toothpick tube 14. At this time, the nozzle 22c of the polishing blast nozzle device 22 is adjusted so as to face the plug 17d side of the plug fastening cheese joint 17.
[0024]
Since the polishing blast nozzle device 22 has a spherical cover 22d, even if the internal passage of the plug fastening cheese joint 17 is complicated, the spout 22c and the like are smoothly caught at a predetermined position without being caught by the uneven portion. Can be moved.
[0025]
In the plug fastening cheese joint 17, the main branch pipe 12 is connected to one connection port 17a, and the branch pipe 14 is connected to the other connection port 17b. Further, a plug mounting portion 17c protrudes on the opposite side of the connection port 17a to which the main branch pipe 12 is connected, and a plug 17d operable from the outside is screwed into the plug mounting portion 17c.
[0026]
As shown in FIG. 5, the spout 22c of the polishing blast nozzle 22 disposed in the plug fastening cheese joint 17 is inclined at an angle of approximately 45 ° with respect to the inflow port 22b. When 22b is arranged upward, the spout 22c is directed horizontally or obliquely upward.
[0027]
Thereby, the mixture 30 of the abrasive and the compressed air sent at a predetermined pressure from the supply hose 23 is ejected from the ejection port 22c toward the plug 17d side, and the inner wall surfaces of the plug mounting portion 17c and the plug 17d, in particular, It will collide with the upper surface side. As a result, the deposits 31 such as rust and dirt adhering to the inner surface of the plug fastening cheese joint 17 are removed by collision with the mixture 30 of the abrasive and the compressed air, and the inner surface is polished.
[0028]
At this time, as shown in FIG. 2, one end of the abrasive collecting pipe 32 is connected to the lowermost end of the drainage main pipe 10, and the other end is connected to the abrasive separator 33. A dust collector 35 and a suction device 36 are connected to the abrasive separator 33 via a hose 34.
[0029]
The actual example which grind | polishes the inner surface while removing the deposit | attachment 31 adhering to the inner surface of the plug stop cheese joint 17 of the exclusive drainage branch pipe 11a using the apparatus mentioned above is demonstrated. First, as shown in FIG. 2, air (hot air if necessary) is allowed to flow from the drain outlet 18 of the exclusive drainage branch pipe 11a into the exclusive drainage branch pipe 11a, so that rust and dirt of the plug fastening cheese joint 17 are present. The deposit 31 is dried. When the dirt is severe, it is also preferable to perform pre-cleaning by high-pressure water jet cleaning in advance.
[0030]
Thereafter, a supply hose 23 having a polishing blast nozzle device 22 attached to the tip is inserted into the longitudinal branch pipe 14 from the drain port 18 and disposed in the plug fastening cheese joint 17 in which the polishing blast nozzle device 22 is to be polished. To do. Next, pressurized air is sent from the air compressor 26 to the supply hose 23 via the supply pipe 27, and the abrasive is put into this air by the abrasive charging machine 25.
[0031]
The mixture 30 of the abrasive and the pressurized air passes through the supply hose 23 and is sprayed from the polishing blast nozzle device 22 onto the inner surface of the plug fastening cheese joint 17, and the deposit 31 is removed by this spraying force and polishing is performed. Made. By this method, the inner surface of the plugging cheese joint 17 of the exclusive drainage branch pipe 11a can be finished to about ISO D Sa2 1/2. The original pressure of air when jetting the mixture 30 from the polishing blast nozzle device 22 is 600 KPa.
[0032]
While the mixture 30 was sprayed from the polishing blast nozzle device 22, the suction device 36 and the dust collector 35 were operated, and the air in the exclusive drainage branch pipe 11 a was connected to the lower end opening of the drainage main pipe 10. The abrasive material sucked into the dust collector 35 via the abrasive material collecting pipe 32, the abrasive material separator 33, and the hose 34, whereby the abrasive material ejected from the abrasive blast nozzle device 22 into the plug fastening cheese joint 17 is the abrasive material separator 33. It is collected by.
[0033]
In the case of this embodiment, since the abrasive is blown onto the inner surface of the plug fastening cheese joint 17 with pressurized air for polishing, a small amount of air is required. The air flow used in this way is small, and the air in the drainage main pipe 10 and the exclusive drainage branch pipes 11a, 11b... Is sucked by the suction dust collector 35 from the lower end opening of the drainage main pipe 10. Therefore, the pressure in the exclusive drainage branch pipes 11a, 11b... And the drainage main pipe 10 does not exceed atmospheric pressure.
[0034]
As a result, when the inside of the plug fastening cheese joint 17 is cleaned and polished, the inside of the drainage main pipe 10 and the exclusive branch pipes 11a, 11b... Do not become atmospheric pressure or higher, and therefore the exclusive branch pipes 11a, 11b,. It is possible to prevent the pressurized air from flowing backward and ejecting from the drain outlets 18, 19 and 20.
[0035]
In the same manner, polishing of the plug fastening cheese joint 17 connected to the other exclusive drainage branch pipes 11b, 11c... Is completed, and then the polishing of the exclusive drainage branch pipes 11a, 11b. Done. In this case, it is first ground to remove iron rust, dirt, etc. adhering to the inner surface.
[0036]
As a polishing method at this time, as shown in FIG. 6, when the exclusive drainage branch pipe 11a is rehabilitated, the inside of the drainage branch pipe 11a is dried by flowing air from the drainage port 18. When the dirt in the pipes is severe, each of the exclusive drain branch pipes 11a, 11b,... Is roughly washed with high-pressure jet water in advance.
[0037]
Next, the opening 40 communicating with the uppermost part of the drainage main pipe 10 and the drainage outlets of the drainage branch pipes 11b, 11c,... Connected to the drainage main pipe 10 are closed by appropriate means.
[0038]
The other end of the hose 43 is connected to the air distributor 42 connected to the air compressor 26 by the hose 41, for example, to the drain port 18 of the exclusive drainage branch pipe 11a for rehabilitation, and the abrasive charging machine 25 is interposed therebetween. Edge is put. The other drains 19 and 20 are also connected to the air distributor 42 by the hoses 44 and 45. Further, a pressure gauge 46 for detecting the pressure of the upper portion of the drainage main pipe 10 is installed near the air distributor 42.
[0039]
Thereafter, the air compressor 26 is operated, and the pressurized air mixed with the abrasive in the abrasive charging machine 25 is sent into the exclusive drainage branch pipe 11a. At this time, the pressure of the air to be fed is such that, when the diameter of the exclusive drainage branch pipe 11a is 50A, the air flowmeter 47 is used to observe the air flow rate so that the flow velocity within this pipe diameter is 100 m / sec. The distribution valve of the air distributor 42 is adjusted. At this time, the distribution valve of the air distributor 42 connected to the drain ports 19 and 20 is slightly opened to flow air to prevent the abrasive from flowing back to the drain ports 19 and 20.
[0040]
On the other hand, at this time, the hose 32 extending from the suction device 36 via the dust collector 35 and the abrasive separator 33 is connected to the lower end of the drainage tub main pipe 10 in the same manner as when the plug fastening cheese joint 17 is polished. The air in the main pipe 10 is sucked. At this time, the pressure in the pipe at the connection point 21a between the drainage main pipe 10 and the exclusive drainage branch pipe 11a is set to be substantially atmospheric pressure or lower. Then, the pressure in the drainage main pipe 10 is confirmed by a pressure gauge 46 that detects the upper pressure of the drainage main pipe 10.
[0041]
Usually, the pipe diameter of the drainage main pipe 10 is one or two sizes larger than the pipe diameters of the exclusive drainage branch pipes 11a, 11b. Accordingly, the pressure loss in the drainage main pipe 10 is small with respect to the polishing air amount of the exclusive drainage branch pipes 11a, 11b..., And the suction capacity of the suction device 36 is about minus 20 KPa. Compared to the above, the ability of the suction device 36 to be used can be greatly reduced.
[0042]
As a result, at similar connection points 21b, 21c, and 21d other than the connection point 21a between the exclusive drainage branch pipe 11a and the drainage main pipe 10, the internal pressure is at or below atmospheric pressure, and the exclusive pipes piped to the exclusive sections of each floor No pressurized air is ejected from each drainage outlet of the drainage branch pipes 11b, 11c.
[0043]
When the other exclusive drainage branch pipes 11b, 11c,... Are polished for rehabilitation, the same procedure is performed. At that time, the deposits and abrasives peeled off from the inner surface of the exclusive drainage branch pipe 11a are sucked into the abrasive separator 33 via the hose 32 connected to the end of the drainage main pipe 10, and separated from the air here. The air is trapped by the dust collector 34 and exhausted from the suction device 36.
[0044]
As a result, the inner surfaces of the exclusive drainage branch pipes 11a, 11b,... Are required for subsequent painting without blowing out pressurized air from the drainage outlets 18, 19, 20 of the drainage branch pipes piped to the exclusive portions of each floor. It can be polished well to a certain extent. Further, the additional branch pipes 13, 14, 15, 16 connected to the main branch pipe 12 of the exclusive drainage branch pipe 11a can be similarly cleaned and polished, and other exclusive drainage branch pipes 11b. , 11c... Can be cleaned and polished in exactly the same manner.
[0045]
The exclusive drainage branch pipes 11a, 11b... And the inner surfaces of the plug fastening cheese joints 17 cleaned and polished as described above are then painted. Whichever may be preceded by the order of painting, here, the case where the plug-stopping cheese joint 17 is painted first will be described.
[0046]
FIG. 7 schematically shows a state in which the plug fastening cheese joint 17 is painted. As a paint used for painting the cheese joint 17, a lining paint such as a vinyl ester resin paint or an epoxy paint is used.
[0047]
When using a vinyl ester resin paint, a curing agent / accelerator is added, and in some cases, a retarder is added and mixed and stirred uniformly. When the paint to be used is accommodated in the pressurized container 50, the pressurized container 50 is placed on a digital scale 51, and the amount of paint used which changes every moment during painting is measured in units of g / second. In this way, by placing the pressurized container 50 on the digital balance 51 and measuring the decrease in weight, it is possible to determine the quality of the coating by always measuring the amount of paint discharged.
[0048]
A hose 52 extending from an air compressor (not shown) is connected to the pressurized container 50, and the inside of the pressurized container 50 is pressurized air sent from the air compressor, and the maximum is 600 KPa depending on use conditions. As a result, the coating material is pumped through the tube 53 to the coating spray nozzle device 55 as shown in FIG.
[0049]
As shown in FIG. 7, the spray nozzle device 55 for painting is suspended in the branch pipe 14 from the drain outlet 18 of the exclusive drain branch pipe 11a as in the case of polishing. As shown in FIG. 8, the spray nozzle device for painting 55 has a special structure so that the paint can be ejected from the nozzle port as a spiral airflow.
[0050]
The structure of the spray nozzle device 55 for painting will be briefly described. As shown in FIG. 8, a disk is mounted on the front end portion of the nozzle body 55a having a nozzle tip formed on the front end portion, and further covers the disk. A cap 55b is attached to the. A through hole is formed on the center axis of the disk attached to the front end of the nozzle body 55a and the cap 55b, and the nozzle tip slightly protrudes to the front side of the cap 55b through the through hole.
[0051]
The liquid ejection passage formed in the nozzle tip communicates with a coating material supply passage 55c formed on the central axis of the nozzle body 55a. Further, a compressed air inlet is formed at the rear end of the nozzle body 55a, and this inlet is communicated with the liquid jet passage through a small-diameter jet port, and is formed parallel to the liquid jet passage and radially outside. The bypass passage 55d is communicated with.
[0052]
The above-described hose 53 is connected to the rear end portion of the nozzle body 55a through a connection member 56, and compressed air is supplied to the compressed air inlet. The connecting member 56 is substantially V-shaped, and is set so that the jet outlet of the nozzle body 55 has an appropriate jet angle β with respect to the horizontal direction, and in this embodiment β = 45 °.
[0053]
Further, a screw hole 55e for connecting a hose 77 for supplying paint is formed on the side surface of the nozzle body 55a, and this screw hole 55e communicates with the passage 55c. On the surface of the disk, a plurality of radial grooves are formed in a spiral shape toward the central hole, and the tip of the bypass passage 55d for supplying compressed air communicates with each radial groove on the outer side in the radial direction of the disk. .
[0054]
According to such a spray nozzle device for painting 55, the compressed air for spraying adjusted to a pressure of about 200 KPa is introduced into the bypass passage 55d and the liquid jet passage through the hose 53.
[0055]
This compressed air for spraying flows along a plurality of spiral grooves formed on the surface of the disk so as to create a vortex from the radially outer side toward the center hole, and the nozzle tip outer peripheral surface at the tip of the nozzle tip and the center of the cap It injects from the annular clearance part with the inner peripheral surface of the through hole. As a result, the jet flow becomes a spiral air flow while spreading forward.
[0056]
On the other hand, the coating material supplied from the hose 53 through the passage 55c in the nozzle body 55a rides on the spiral jet of compressed air at the nozzle port, so that the coating material 57 flows into the nozzle port as shown in FIG. Will be ejected in a spiral. As a result, the paint 57 can be sprayed onto the inner wall surface of the plug-fastening cheese joint 17, particularly the upper surface side.
[0057]
Further, as shown in FIG. 7, while spraying the paint 57 from the spray nozzle device 55 for painting, the suction dust collector 36 is operated in the same manner as in the polishing, and the drainage main pipe 10 and the exclusive drainage branch pipe 11a, 11b... Can be sucked into the suction dust collector 36.
[0058]
As a result, the compressed air sprayed from the spray nozzle device 55 for painting into the plug-stopping cheese joint 17 and the volatile components in the paint 57 diffuse into the room from the lower end of the drainage main pipe 10 and the drain outlets 18, 19, 20. Can be prevented.
[0059]
Similarly, the plug fastening cheese joint 17 connected to the other exclusive drainage branch pipes 11b, 11c. Thereafter, the exclusive drainage branch pipes 11a, 11b,.
[0060]
For example, as shown in FIG. 10, when painting the exclusive drainage branch pipe 11 a, the suction type dust collector 36 from the end of the drainage main pipe 10 while feeding the paint into the pipe with the pressurized air from the drain outlet 18 with an appropriate air flow rate. Suction is performed so that the pressure in the pipe at the connection point 21a between the drainage-exclusive branch pipe 11a and the drainage main pipe 10 becomes atmospheric pressure or lower.
[0061]
Specifically, as shown in FIG. 10, an opening 40 communicating with the uppermost portion of the drainage main pipe 10 and the exclusive drainage branch pipes 11 b, 11 c, etc. other than the rehabilitation target connected to the drainage main pipe 10. The drain outlets 18, 19, and 20 are closed by appropriate means. A paint supply 60 is attached to the drain outlet 18 of the exclusive drainage branch pipe 11a for rehabilitation, and the paint supply 60 is connected to an air distributor 42 connected to the air compressor 26 via a hose 41. The other end of the hose 61 is inserted. The other drain ports 19 and 20 are also connected to the air distributor 42 by the hoses 62 and 63.
[0062]
Thereafter, the air compressor 26 is operated, and the paint is fed from the drain port 18 together with the pressurized air. As the paint, it is desirable to use a lining paint such as a vinyl ester paint or an epoxy paint.
[0063]
At that time, when the inside of the pipe is sucked with a suction force of minus 10 KPa by the suction device 36 through the hose 32 connected to the end of the drainage main pipe 10, if the pressurized air pressure from the drain outlet 18 is 20 KPa, the air flow rate Is 7m ^Three The pressure in the pipe at the connection point 12a becomes atmospheric pressure or lower at / min.
[0064]
Then, the pressure in the drainage main pipe 10 is confirmed by a pressure gauge 46 that detects the upper pressure of the drainage main pipe 10. Under this condition, the exclusive drainage branch pipe 11a is painted by flowing the paint for a time determined by the pipe length. Thereafter, the branch branch pipes 13, 15, 16 of the drainage branch pipe 11a are painted in the same manner.
[0065]
In this way, after the coating of all the exclusive drainage branch pipes 11a, 11b... Is completed, the coating film is cured by flowing air from the drainage ports 18, 19, and 20. In the case of a vinyl ester paint mixed with a predetermined curing agent and curing accelerator, it has been confirmed that the coating is cured in about 15 to 20 minutes.
[0066]
As described above, according to the drainage branch rehabilitation method of the present invention, the abrasive blast air nozzle device 22 and the paint spray nozzle device 55 are used to remove the abrasive-air mixture 30 and the paint 57 in the cheese joint 17. By spraying toward the plug 17d side, the inner surface of the plug fastening cheese joint 17 that could not be sufficiently polished and painted by the conventional method can be polished and painted in a short time to sufficiently regenerate. Since it can do, it can suppress that corrosion progresses from the plug stop cheese joint 17 after renovating exclusive drainage branch pipe 11a, 11b ....
[0067]
When the plug fastening cheese joint 17 and the exclusive drainage branch pipes 11a, 11b,... Are polished or painted, the internal camera 70 as shown in FIG. 11a, 11b... Are inserted, and the inside of the tube is illuminated by the illumination device, and the work can be accurately performed while confirming the details with the camera.
[0068]
The in-tube camera 70 is generally used for various in-tube operations. The in-tube camera 70 includes a camera body 71, a lighting device 72, a skid 73, a camera body 71 and a skid 73 arranged around the camera body 71. A spring guard 74 and a camera cable 75 for protecting the connecting portion.
[0069]
The in-tube camera 70 may be inserted into the exclusive drainage branch pipes 11a, 11b,... Separately from the above-described polishing blast nozzle device 22 or coating spray nozzle device 55, or may be inserted integrally. You can also.
[0070]
Moreover, in the above-mentioned embodiment, the exclusive drainage branch pipe 11a is arrange | positioned on a ceiling, the branch pipe 14 extended to a perpendicular direction is connected to the plug stop cheese coupling 17, and it is for grinding | polishing from the drain outlet 18 provided in the upper end. The blast nozzle device 22 and the spray nozzle device for painting 55 are inserted. As shown in FIG. 12, the branch pipe 11n for exclusive drainage is piped on the floor surface 64 (horizontal pipe), and the connection port of the plug fastening cheese joint 17 The present invention can also be applied when the branch pipes 65 and 66 connected to 17a and 17b are horizontally connected.
[0071]
In this case, the polishing blast nozzle device 22 and the coating spray nozzle device 55 are inserted into the cheese joint 17 from the drainage port 68 of the toothpick pipe 67 located closest to the plug fastening cheese joint 17 and moved into the cheese joint 17. By doing so, the plug fastening cheese joint 17 can be polished and painted.
[0072]
Further, in the above-described embodiment, when the plug fastening cheese joint 17 is painted, the spray nozzle device 55 dedicated for painting is used, but a nozzle device having the same shape as the polishing blast nozzle device 22 shown in FIG. 4 is painted. It can also be used as a spray nozzle device.
[0073]
Moreover, although the above-mentioned embodiment demonstrated the case where both a grinding | polishing process and a painting process were performed when rehabilitating the plug stop cheese joint 17 and exclusive drainage branch pipe 11a, 11b ..., a plug stop cheese joint 17 or the exclusive drainage branch pipes 11a, 11b... Are close to a new article and no rust or the like is attached thereto, the polishing process is omitted and only the painting process is performed.
[0074]
Furthermore, although the case where the plug fastening cheese joint 17 is renewed has been described in the above embodiment, the present invention can also be applied to the case where the inspection joint connected to the exclusive branch pipe is rehabilitated.
[0075]
【The invention's effect】
As described above, according to the drainage branch rehabilitation method of the present invention, for example, in a multi-storey building such as a condominium, the inner surface of the exclusive drainage branch of each floor exclusive part connected to the drainage main pipe Paint the inner surface of the drainage plug joint that is connected to this exclusive drainage branch pipe, and if it has rust on the inside, paint it and rehabilitate it Therefore, after refurbishing the branch pipe, it is possible to suppress the progress of the corrosion from the plug stopper cheese joint dedicated to the drain pipe, and the effect of correcting the drain branch pipe can be sufficiently exhibited.
[Brief description of the drawings]
FIG. 1 is a flowchart showing the steps of a drainage branch rehabilitation method according to the present invention.
FIG. 2 is a view showing a polishing method for a drainage pipe-dedicated cheese joint in the drainage branch rehabilitation method of the present invention.
FIG. 3 is a view on arrow A in FIG. 2;
FIG. 4 is a cross-sectional view showing a polishing blast nozzle of the present invention.
FIG. 5 is a view showing a polished state of the drain pipe exclusive plug-stopping cheese joint of the present invention.
FIG. 6 is a diagram showing a method for polishing a dedicated branch pipe in the drainage branch rehabilitation method of the present invention.
FIG. 7 is a view showing a method of painting a drainage pipe-dedicated plug joint cheese joint in the drainage branch rehabilitation method of the present invention.
FIG. 8 is a view showing a spray nozzle device for coating in the drainage branch rehabilitation method of the present invention.
FIG. 9 is a view showing a paint state of a drain pipe dedicated plug-stopping cheese joint in the drainage branch pipe rehabilitation method of the present invention.
FIG. 10 is a view showing a method for coating a dedicated branch pipe in the drainage branch rehabilitation method of the present invention.
FIG. 11 is a diagram showing an in-pipe camera used in the drainage branch rehabilitation method of the present invention.
FIG. 12 is a diagram showing another embodiment of the drainage branch rehabilitation method of the present invention.
[Explanation of symbols]
10 Drainage main pipe
11a, 11b ... Exclusive drainage branch
17 Drainage pipe dedicated plug stopper cheese joint
17d plug
22 Blast nozzle device for polishing
30 A mixture of abrasive and air
31 Deposits
55 Spray nozzle device for painting
57 Paint

Claims (6)

In a method for rehabilitating a drainage branch pipe comprising a branch pipe connected to a drainage main pipe and a drainage pipe-dedicated cheese joint having a plug operable from outside to clean or inspect the branch pipe,
From the front end portion of the spray nozzle device for painting disposed in the branch pipe or the plug stopper cheese joint dedicated to the drain pipe, paint is sprayed toward the plug side of the plug stopper cheese joint dedicated to the drain pipe, and the drain pipe Spraying the paint on the inner surface of the dedicated plug-fastening cheese joint, and simultaneously painting the inner wall of the dedicated drainage pipe-plugging cheese joint by sucking air inside the pipe from the lower end of the drainage main pipe,
And a step of painting the inner wall of the branch pipe. A polishing blast nozzle device in which abrasive is mixed with compressed air and placed in the branch pipe or in the drain pipe dedicated plug joint before the drain pipe plugging cheese joint and the branch pipe coating step. From the tip, sprayed toward the plug side in the drainage pipe dedicated cheese joint, sprayed the abrasive on the inner wall of the drainage pipe dedicated cheese joint, and at the same time, piped from the lower end of the drainage main pipe A process of removing the deposits such as rust adhering to the inner wall of the drainage pipe dedicated plug stopper cheese joint by aspirating the internal air and polishing the inner wall;
The method for rehabilitating a drainage branch pipe according to claim 1, further comprising: polishing the inner wall of the branch pipe. The drainage branch pipe rehabilitation method according to claim 1 or 2, wherein the spray nozzle device for painting ejects the paint in a direction inclined at a predetermined angle with respect to an inflow direction thereof. The drainage branch pipe rehabilitation method according to claim 2 or 3, wherein the polishing blast nozzle device ejects the abrasive in a direction inclined at a predetermined angle with respect to an inflow direction thereof. The drainage branch rehabilitation method according to claim 3 or 4, wherein the predetermined angle is approximately 45 °. The drainage branch pipe rehabilitation method according to any one of claims 1 to 5, wherein the drainage branch pipe is used for draining water from a living water facility for each floor in an apartment house.

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