JP2001219121A - Method for regenerating drain for miscellaneous use water from apartments - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove stepped parts and joint parts of drains for miscellaneous use water, where foreign matters are internally caught or accumulated materials are easily stuck and efficiently perform a regenerating operation, when the drains are regenerated at apartments. SOLUTION: This method for regenerating the drains is to regenerate the drains consisting of vertical main pipes with branches and bifurcations arranged in a building. In details, the drains for miscellaneous use water at the apartments are regenerated by the process to dry the interior of the drains, the process remove scales and the accumulation of filth containing oils and fats sticking to the interior of the drains and clean the drain, and the process to supply a solventless two-pack epoxy resin and form inner resin pipes of a continuous shape on the inner faces of the drains. Thus, the adopted prices to dry the entire filth sticking to the inner part of the drains all at once and remove the filth and then clean the interior of the drains contributes to the enhancement of an operating efficiency. Further, the later coating process efficiently forms a good-quality and thick coating film, which is, in turn, dried to form the inner resin pipe of a continuous shape, and consequently, the incidence of foreign matters being caught or accumulated decreases and the rapid drainage is achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous resin inner pipe disposed inside a general drainage pipe, which is disposed in a building such as an apartment house or the like and has a branch main pipe and a vertical main pipe. The present invention relates to a method for forming and rehabilitating a miscellaneous drainage pipe.

[0002]

2. Description of the Related Art Conventionally, as a method of rehabilitating such a miscellaneous drainage pipe, a method of rehabilitating a pipe by lining the inner surface of the pipe disclosed in Japanese Patent Application Laid-Open No. 11-156272 is known as a conventional example.

[0003] This prior art uses a brush-shaped rotary applicator that moves while rotating inside the pipe, and uses a lining agent supply hose that moves together with the rotary applicator, and uses these together. Insert from one end to the other end of the pipe to be rehabilitated, pull out the supply hose while discharging the lining agent from the supply hose, and sequentially apply the lining agent discharged by the brush of the moving rotary applicator to the inner surface of the pipe After application, a ball called a pig having a diameter smaller than the inner diameter of the pipe is blown from one end side to the inner surface of the pipe by air to roll, and the lining agent applied previously is stretched to flatten the surface, and the inside of the pipe is flattened. A coating film having a predetermined thickness is formed on the surface.

[0004] A ball called a pig is connected to the back of the spin coating device so as to be dragged, and immediately after the lining agent is applied by the spin coating device, the coating lining agent is stretched by the ball to flatten the surface. A coating film having a predetermined thickness is formed on the inner surface of the tube.

[0005]

However, according to the conventional rehabilitation method, the brush-shaped rotary applicator has a nylon brush connected to a drive shaft of an electric motor by a flexible shaft, and has a lining. The target drainage pipe is a branch pipe branched from the vertical main pipe, and its length is at most 2-3 m and at most 5 m or less. Since the flexible shaft cannot transmit power while being wound, there is a limit on the length of the power transmission. For example, when the flexible shaft is longer than 10 m, it cannot be handled substantially. In addition, there is a problem that lining cannot be performed for a main pipe exceeding 10 m.

In addition, since the lining agent in this conventional example is applied by a rotating brush while being supplied by a supply hose, the drawing speed of the supply hose and the supply amount of the lining agent are adjusted by a kite and the movement of the rotating brush is controlled. Since they must be matched, there is a problem that the work procedure is time-consuming, and it is difficult to apply with a nylon brush unless a lining agent having a long pot life and low viscosity is used.

[0007] Therefore, in the conventional example, a lining agent having a short pot life and a high viscosity is used in order to enable lining even of a long standing main pipe and to form a thick coating film. There is a problem that must be solved in order to be able to perform the lining work even with the use of a.

[0008]

As a specific means for solving the problems of the prior art, the present invention rehabilitates a drainage pipe consisting of a vertical main pipe having at least a branch portion which is piped in a building, A step of drying the inside of the drain pipe, a polishing step of removing and cleaning scale deposits and dirt deposits containing oils and fat components adhering to the inside of the drain pipe, and supplying a solventless two-component epoxy resin. Forming a coating film of a predetermined thickness on the inner surface of the pipe, and detecting the internal state of the drainage pipe by the detecting means at the time of forming the coating film, and adjusting the supply amount of the two-part epoxy resin according to the internal state. Means for drying a formed coating film to form a continuous resin inner pipe on the inner surface of the pipe. .

In the present invention, the step of drying includes blowing hot air or dry air; the step of polishing to remove deposits includes blowing sand-like substances together with a stream of compressed air into a drain pipe; The supply of the two-part epoxy resin of the mold is performed by spraying toward the inner wall surface of the drain pipe and mixing the two liquids immediately before the spraying;
Includes steps to remove and clean dirt deposits, including scales and grease components; means for adjusting the supply of two-part epoxy resin include coating speed moving along the length of the drain, drainage Setting based on the internal conditions of the pipe; as an additional requirement.

In the present invention, the formation of the continuous resin inner pipe on the inner surface of the miscellaneous drainage pipe reduces the possibility of foreign matter being caught or piled up, allows for quick drainage, and allows the entire pipe including the branch portion to be drained. Corrosion progress is prevented and it can be used for a long time.

In addition, by using a resin inner tube forming apparatus composed of an injection head portion, a mixing portion, and a twin hose for supplying a main agent and a curing agent, a good thick coating film can be formed. It can be formed efficiently and promptly, and is dried to form a continuous resin inner tube. An inner tube which is excellent in strength and hardly generates deposits can be obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 schematically shows the situation of some drainage pipes in an apartment house such as an apartment, and the drainage pipe 1 has a vertical main pipe 2 including an extended ventilation pipe from the roof of the top floor to the basement. The horizontal main pipe 3 is provided at the lower end thereof for external drainage. Then, a branch pipe 5 or a ventilation pipe branched through a branch 4 such as a TY joint is connected to the standing main pipe 2 for each individual house on each floor or for each combined ventilation connection (not shown). Have been.

In each individual house, a branch pipe 5
And a sink 6 is connected via a drain trap 7. In addition, in each individual house, drain pipes for a bath, a washing machine, and a wash basin may be separately provided, but this is a method for rehabilitation including these drain pipes.

The drainage is rich in oil stains and various miscellaneous dirt components and foreign matters, and the miscellaneous drainage pipe 1 to which the sink 6 is connected is capable of adhering scales and oils and fat components to the inner surface of the branch pipe 5 branching off from the main pipe 2. In addition to deposits of dirt including the dirt, the flow of drainage is obstructed, and, depending on the location of the drainage pipe, in particular, the vicinity of the branch portion 4 may be corroded and a hole may be formed or a crack may be generated. .

To regenerate the drainage pipe 1 in such a situation, it is necessary to first clean the inside of the drainage pipe 1. In this case, the cleaning step is preliminarily selected in accordance with the degree of adhesion of the sediment inside the gray drainage pipe, that is, the degree of dirt. If the degree of contamination is remarkable, a conventional pipe cleaning device (for example, Japanese Patent Application Laid-Open
No. 9192), most of the deposits are removed by rotating balls and high-pressure washing water, and after the removal, for example, hot air or hot air is supplied to add the inside of the drainage pipe 1. Heat and dry, and then carry out the polishing process by passing sand-like material with compressed air, remove scales that are difficult to fall off, and then introduce compressed air that does not mix sand-like material and clean it thoroughly State.

If the degree of dirt is small (normal case), first, warm air or hot air is blown to dry the sediment inside the gray drainage pipe appropriately, and then the sand is blown by compressed air. Performing the polishing process by passing the state substance,
The dry sediment containing scales that are difficult to fall off is removed, and then only compressed air is introduced to clean the scale. In any of the polishing steps, the supply of the sand-like substance to the compressed air is performed continuously or intermittently, and the polishing step is performed in one direction or reciprocating.

The lining of the main standpipe 2 in the gray drainage pipe 1 with the inside cleaned in this way is shown in FIG.
This will be described with reference to FIG. The vertical main pipe 2 including the extended ventilation pipe has a horizontal main pipe 3 whose upper end is from the roof of the top floor and whose lower end is underground.
The lining is provided from the side of the horizontal main pipe 3 at the lower end.

FIGS. 2A and 2B show an apparatus for forming a resin inner tube used in this lining. This forming apparatus includes a resin injection head section 10, a mixing section 11 for mixing a main agent and a curing agent, and a twin hose 12 for supplying the main agent and the curing agent.

The ejection head unit 10 has a small motor 13 housed therein, and a bowl-shaped head 14 is attached to a rotating shaft 13 a of the small motor 13. The bowl-shaped head 14 is located on the tip end side (lower end side in the figure) of the ejection head unit 10, and has a plurality of small holes or slit-shaped holes 15 provided on the peripheral side wall thereof. The resin paint supplied to 14 is jetted to the outside in a jet state from small holes or slit-shaped holes 15 by centrifugal force due to rotation.

A center holder 16 is attached to the outer peripheral surface of a plurality of portions (in the illustrated embodiment, substantially at the middle and the base side) of the body of the jetting head portion 10. The center holder 16 has a plurality of elastic members mounted radially and inclined toward the head 14, and positions the ejection head unit 10 at, for example, a substantially central portion of the vertical main pipe 2. Things.

The supply of the resin paint to the bowl-shaped head 14 is arbitrarily and appropriately supplied from the base side of the jetting head unit 10 through a supply pipe 17. Since it is located near the inner bottom of 14, the resin paint is evenly dispersed along the bottom and a uniform spray state is obtained as a whole.

The mixing section 11 has a tubular shape of a predetermined length as a whole, and the tip side is connected to the base side of the jetting head section 10 and communicates with the supply pipe 17.
The mixing section 11 is provided with a mixing element 18 of a resin paint supplied in two liquids.

As shown in FIG. 2B, the mixing element 18 has a screw conveyor shape as a whole, and fin-shaped right twisting elements 18a and left twisting elements 18b are alternately arranged. And the number of these left and right twisted elements is about 30. When the supplied two liquids pass through the left and right twisted elements 18a and 18b,
According to the twist of the fin, the fluid near the center is alternately split and transposed toward the tube wall side, and the fluid on the tube wall side is alternately transposed to the central portion side.

At the base side of the mixing section 11, there is provided a junction 19 of resin paint supplied in two liquids.
9 is provided with two connection pipes 20 and 21. A twin hose 12 for supplying the main agent and the curing agent is connected to the connection tubes 20 and 21. For example, the main agent supply side 12 a of the twin hose 12 is connected to the connection tube 2.
At 0, the hardener supply side 12b is connected to the connecting tube 21 via couplers 20a, 21a, respectively.

As shown in FIG. 3, the lining of the standing main pipe 2, that is, the formation of the resin inner pipe, will be described with reference to FIG.
However, even if the length is, for example, 20 m or more, the twin hoses 12 are successively inserted from the upper end of the standing main pipe 2 together with an appropriate traction wire, and then descend to reach the horizontal main pipe 3 at the lower end. At the connecting part of the main pipe 2
Of the twin hose 12 at each end 12
a, 12b via couplers 20a, 21a
0 and 21 are respectively connected, whereby the mixing unit 11 is connected.
At the same time, the jet head 10 can be easily connected, and the towing wire can be connected to the jet head 10 so that the wire can be pulled up independently of the twin hose 12.

In this state, the main agent and the curing agent are supplied from the twin hose 12 to check whether or not the resin has reached the bowl-shaped head 14 of the injection head unit 10. By pulling up the twin hose 12 at a predetermined speed together with the towing wire from a predetermined cutting portion at the upper portion, and turning on the small motor 13 and rotating the head 14 while continuing to supply the resin, the small hole of the head 14 is formed. The resin is sprayed from 15 by centrifugal force and adhered or applied to the inner wall surface of the main pipe 2 to form a substantially uniform resin layer or paint layer 22.

Since the main agent and the curing agent supplied from the twin hose 12 are separately circulated until they are supplied from the connecting pipes 20 and 21 to the mixing section 11, even if a considerably long twin hose 12 is used. , After the work is completed,
Material waste can be eliminated by removing the pieces 1 and collecting them separately.

The resin to be supplied is, for example, a non-solvent type epoxy resin-based paint.
No. -183941 is used, the amount of which is calculated in advance by calculating the diameter, length and thickness of the coating film to be formed on the main pipe 2, and it is 10 to 30% smaller than the calculated amount. Supplied to be somewhat larger. The reason for this is that extra paint is required because it is often used to fill the corrugated holes or cracks near the steps 4 or the branch 4 in the TY joint that connects the pipes. is there.

In this case, for the pulling speed of the pulling wire and the amount of the supplied paint, for example, as shown in FIG. 4, an appropriate control device 23 serving as control means is used. The control device 23 receives, for example, a predetermined numerical value.
There is a numeric keypad 24 for displaying and calculating, and a display unit 25 for confirming and displaying the input or calculated numerical value.
And a display unit 26 for displaying the actual pulling speed of the pulling wire and the supply amount of the paint. The display unit 26 further includes a state detection unit for the ejection head unit 10 and a supply state detection unit for the paint. Is provided, and has a function of changing the setting of the pulling speed or the supply amount of the paint based on the data of the state detection.

The state of the jet head 10 is detected by the state of contact of the center holder 16 with the tube wall. That is, there are a case where the fluctuation of the traction force due to the contact resistance force is detected and a case where the degree of opening of the radially provided center holder 16 is detected. The fluctuation of the traction force is caused by one of the center holders 16, for example, the branch portion 4.
The contact (or the position of the branching portion 4) is immediately detected as a change in the traction force because the contact resistance becomes weaker or stronger due to the fitting into the hole, or the falling or catching in the corroded hole. Yes, it becomes detection data.

The detection of the degree of openness of the center holder 16 is based on the fact that one of the center holders 16 fits into the branch 4 or falls into or gets caught in a corroded hole, one of which is lower than the other center holders. The degree of the opening of the leg is increased or the vibration is caused, so that the existence and position of the branch 4 or the corroded hole can be known. These detections include not only the presence of the branch 4 not shown on the piping drawing, but also the degree of damage to the drain pipe, the presence of a step in the joint part unique to the drain pipe, and the presence / absence of connection of different diameter pipes. Can also detect the status of the piping at the same time,
It becomes the detection data.

Based on these detection data, for example, when a large amount of paint is required at the branch portion 4, the corroded hole or the step portion, the relationship with the pulling-up speed of the jet head 10 is obtained. And calculating the time required for the head 14 to pass through the branch 4, the corroded hole and the step on the basis of the detection data, and reduce the speed of passing through the branch 4, the corroded hole and the step, or increase the discharge amount. As a result, a large amount of paint can be sprayed and a thick paint can be applied in order to fill the vicinity of the branch portion 4, corroded holes, cracks, and the like.

The paint supply state is detected by the head 14.
The discharge amount of the paint is detected at the end of the supply pipe 17 facing the above, and is used as detection data, so that an appropriate discharge amount is always obtained based on the detection data. For example, if the vertically hung twin hose 12 is 20
m, the flow velocity at the tip end side of the twin hose 12 is increased and the supply is excessive, without increasing the supply pressure of the liquid base agent and the curing agent so much. If the hanging state of the twin hose 12 becomes 5 m or less, the flow velocity at the tip end side becomes slow, and the supply amount is reduced. Therefore, the supply pressure must be increased. Is necessary.

Further, when the gray drainage pipe 1 is composed of different diameter pipes whose diameters are sequentially changed from the lower end to the upper end, the lower main pipe part having a large diameter at the lower part and the main pipe part having a small diameter at the upper part are provided. Therefore, the supply amount of the paint and the lifting speed of the ejection head unit 10 are naturally different from each other, and the adjustment must be performed. Therefore, in setting the relationship between the supply amount of the paint and the lifting speed of the ejection head unit 10, these are detected and the control unit 23 for setting the detection is used.
It is necessary. Note that the above description is based on the main
Although the coating from the lower end side has been described, the coating from the upper end side is also possible, and the horizontal main pipe can be similarly coated. Further, a coating film can be formed on each branch pipe by a spray method.

In any case, the paint is sprayed onto the inner wall surface of the vertical main pipe 2 as shown in FIG. 5 while adjusting the lifting speed of the spray head and the supply amount of the paint by using the control device. A thick coating film having a good quality of about 1 to 3 mm can be efficiently and promptly formed, and the formed coating film is forcibly dried by blowing heated (drying) air from the lower end of the main pipe 2, for example. Of course, if it is naturally dried), it becomes a continuous resin inner pipe over the entire length of the vertical main pipe 2. Since the rehabilitation work, that is, the drying step, the polishing (cleaning) step and the painting step are easy and the lining time is shortened, the same day rehabilitation (rehabilitation) can be performed without performing a temporary drainage pipe.

[0036]

As described above, the method of rehabilitating a miscellaneous drainage pipe in an apartment house according to the present invention regenerates a drainage pipe that is provided in a building and has a branch portion and a vertical main pipe and a branched branch pipe. A step of drying the inside of the drainpipe, a step of removing and cleaning scales and dirt deposits containing oil and fat components adhering to the inside of the drainpipe, and a solventless two-part epoxy resin. And forming a continuous resin inner pipe on the inner surface of the pipe by removing the dirt from the inside of the drain pipe together and then removing the dirt. In addition, a good and thick coating film can be efficiently formed by the subsequent coating process, and it is dried to form a continuous resin inner tube. ,
An excellent effect of filling corrosion holes, cracks, and the like in the branch portion and preventing the progress of corrosion and being usable for a long time is exhibited.

Further, the main agent and the curing agent are supplied to the main pipe to be rehabilitated in a separate system, and the two liquids are mixed and jetted immediately before coating, whereby a good thick coating film can be efficiently and promptly formed. The inner pipe is dried and becomes a continuous resin inner pipe.The inner pipe is excellent in strength and hardly produces deposits, and has an excellent effect that relining work by lining can be performed on the same day. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing a situation of a gray drainage pipe in an apartment house to which a rehabilitation method according to an embodiment of the present invention can be applied.

FIGS. 2A and 2B schematically show an apparatus for forming a resin inner tube used in the rehabilitation method, wherein FIG. 2A is a cross-sectional view schematically showing the whole, and FIG. It is a part enlarged sectional view.

FIG. 3 is a side view showing a cross section of a part of the main standpipe, schematically showing a situation in which the rehabilitation method is being performed.

FIG. 4 is a front view showing an example of a control device used in the rehabilitation method.

FIG. 5 is an enlarged sectional view showing a resin inner pipe formed on the inner wall surface of the main standpipe by the rehabilitation method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Miscellaneous drainage pipe 2 Standing main pipe 3 Horizontal main pipe 4 Branch part 5 Branched branch pipe 6 Sink 7 Drain trap 10 Injection head part 11 Mixing part 12 Twin hose 12a Main agent supply side 12b Curing agent supply side 13 Small motor 13a Rotation Shaft 14 Head 15 Hole 16 Center Holder 17 Supply Pipe 18 Mixing Element 18a Right Twist Element 18b Left Twist Element 19 Junction 20, 21 Connection Pipe 20a, 21a Coupler 22 Resin Layer or Paint Layer 23 Controller 24 Numeric Keypad 25, 26, 27 Display

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F16L 41/03 F16L 55/16 55/16 B05C 7/02 // B05C 7/02 9/10 9/10 F16L 41 / 02 A F term (reference) 2D061 AA04 AB10 AE01 3H019 BA04 BA14 BA43 BB01 3H025 EA01 EB23 ED02 EE05 4D075 AG01 AG18 AG23 BB04X BB24X DA14 DA19 DC01 EA27 EB33 4F042 AA26 DA04 DA08 EA33 EA05 EA33

Claims (6)

[Claims] Claims: 1. A method for rehabilitating a drainage pipe composed of a main pipe having at least a branch portion, which is piped in a building, wherein the step of drying the inside of the drainage pipe is attached to the inside of the drainage pipe. A polishing step of removing and cleaning dirt deposits including scale and oil components; a step of supplying a solventless two-component epoxy resin to form a coating film of a predetermined thickness on the inner surface of the pipe; Sometimes includes a means to detect the internal state of the drainage pipe by the detection means and adjust the supply amount of the two-part epoxy resin according to the internal state, dry the formed coating film and form a continuous resin on the inner surface of the pipe A method of rehabilitating miscellaneous drainage pipes in an apartment house, comprising the step of forming an in-house pipe. 2. The method according to claim 1, wherein the step of drying comprises sending hot air or dry air. 3. The method for rehabilitating a drainage pipe in an apartment house according to claim 1, wherein the polishing step of removing the sediment includes blowing sand-like substances together with a compressed air flow into the drainage pipe. 4. The miscellaneous wastewater in an apartment house according to claim 1, wherein the supply of the solvent-free two-component epoxy resin is performed by an injection method toward the inner wall surface of the drain pipe, and the two liquids are mixed immediately before the injection. How to rehabilitate the tube. 5. Prior to the drying step, a scale,
The method for rehabilitating a gray drainage pipe in an apartment house according to claim 1, comprising a step of removing and cleaning a deposit of dirt containing an oil component. 6. The drainage pipe according to claim 1, wherein the means for adjusting the supply amount of the two-part epoxy resin is set based on a coating speed moving along a length direction of the drainage pipe and an internal condition of the drainage pipe. Rehabilitation method of miscellaneous drainage pipes in multifamily housing.