JP5356948B2 - Pig water collecting device for water pipe painting - Google Patents

Description

  The present invention accepts a pig made of a ball-shaped elastic body used for painting in a water supply pipe in a construction for rehabilitating an existing water supply pipe disposed in a high-rise building such as an apartment building such as a condominium or an office building. The present invention relates to an apparatus for collecting.

  Conventionally, in construction (means, etc.) for rehabilitating this type of existing water supply pipe, the inner surface of the water supply pipe is cleaned and then coated (lining) with a solvent-free two-component epoxy resin paint. There is a rehabilitation method in which pigs are used for painting.

  As a first known example in which a pig is used in such a rehabilitation method, the coating section is divided into branch pipes from one end side to the other end side of the existing pipe, and the entire pipe section is divided into each section. A quantity of paint capable of forming a preset film thickness corresponding to the length and inner diameter of the pipe is added all at once, and the paint is blown sequentially from the metamorphic slag flow to the annular flow by the air supply fluid of a predetermined pressure. After forming the primary coating film, a predetermined amount of paint that can be applied up to a position exceeding the position of the second joint member in each divided coating section is supplied as a reference, and the paint is supplied to the air supply fluid or A sliding coating (pig) makes it possible to maintain the state of the metamorphic slag flow at once, forming a secondary coating film, and thinning it on the thin coating film on the start side by secondary coating. By forming the coating film to be corrected, It is that it is possible to form a coating film of the scan good thickness (see Patent Document 1).

  Also, lining (primary coating) is performed in the pipe by supplying gas, and after the primary coating is cured, the coating is re-introduced and has a diameter larger than the inner diameter of the branch pipe, and is open-celled with synthetic resin. The elastic foam (pig) is inserted and the elastic foam is pushed by air pressure to perform lining (secondary coating). A thick coating is formed by sliding coating (see Patent Document 2).

JP 2006-232128 A JP-A-4-187269

  By the way, in the coating (lining) of these rehabilitation methods, a relatively hard pig has recently been used to form a uniform coating film, and immediately after painting using the pig, In any of the conventional examples, no mention is made of a device (means) for receiving a pig jumping out from an end portion of the main pipe.

  This type of water supply pipe generally has at least four branch pipes with respect to the main pipe in a single household, and coating is performed for each branch pipe. Pig is put in and the pig is collected from the base end side (meter mounting end side) of the main pipe, but at the time of painting, the pig is pushed and painted with the required air pressure. After painting is finished, it will jump out from the base end side of the main pipe, and the pig is received by a net-like bag.

  However, since the required air pressure is applied when the pig jumps out, a large bursting sound is generated at the moment of jumping out at a considerable moment. In this state, each branch pipe is painted in the rehabilitation work of the water pipe at each door, so there are four bursts, and each time a large burst of sound reverberates around, causing discomfort. In addition, the neighborhood may be annoyed, and the net-like bag may be torn by repeated jumping, causing the pig to jump out, and there is a risk of damaging items or hitting outsiders is there.

  Therefore, in any of the above-described known techniques, the rehabilitation means for the water supply pipe that is coated using the pig has a problem of recovering the pig safely and without generating a large plosive sound.

As a specific means for solving the above-mentioned problems, the present invention collects pigs immediately after painting in the painting process in the rehabilitation work of existing water pipes, and is a lid that can be opened and closed. A cylinder for connecting to an existing water supply pipe is provided on the front side of the box body provided with an exhaust cylinder on one side, and shock caused by the jumping out of the pig is buffered on the back side of the box body Provided with a water pipe painting pig recovery device, characterized in that a cushioning material of the required thickness is detachably disposed, and a muffler muffler is attached to the exhaust cylinder to mute the popping sound caused by the pig popping out. To do.

In the present invention, the recovery device of the pig water supply pipe coating, before Kifuta body, transparent it is made of plastic; be coupled with coupling tubular body and the water supply pipe is a hose required length; the The connecting cylinder and the exhaust cylinder are provided with clamp fittings as an additional requirement.

  According to the pig water collecting device for collecting paint for water pipes according to the present invention, it is used by connecting to an existing water pipe to be rehabilitated. It can be safely stored in the box body, and the popping sound generated when the pig jumps out is almost silenced by the muffler muffler, so it is possible to completely eliminate the discomfort and nuisance of the neighborhood due to the popping sound. Play.

It is a front view which shows the collection | recovery apparatus of the pig for water supply pipe coating concerning preferable embodiment which concerns on this invention. It is a top view which shows the collection | recovery apparatus of the feed pipe coating pig which concerns on the same embodiment. It is explanatory drawing which showed schematically the condition which uses the collection | recovery apparatus of the water supply pipe coating pig which concerns on the embodiment.

  The present invention will be described based on the illustrated embodiment. 1 and 2, a preferred embodiment of a water pipe painting pig recovery device 1 has a box shape as a whole, and a lid 3 that can be opened and closed is provided at the top of the box body 2. A cylinder 4 for connection with a water supply pipe, which will be described later, is provided protruding, and a clamp metal fitting 5 is provided on the connection cylinder 4 so that a member to be attached such as a hose can be easily connected and detached. ing.

  On one side surface of the box body 2, an air discharge cylinder 6 is provided so as to protrude, and a clamp fitting 7 is also provided on the air discharge cylinder 6, and the muffler muffler 8 is attached and detached via the clamp fitting 7. Easy to install. Cellulose fiber (aperture: 10 microns) is used as the sound absorbing material of the muffler muffler. In addition, a cushioning material 9 made of a sponge plate or the like having a required thickness is detachably disposed inside the box body 2 on the back side.

  The box body 2 may be made of wood or metal, but is preferably made of plastic and has a rectangular shape with a depth when viewed from above, and the lid 3 is made of transparent plastic so that the inside can be seen in the covered state. Are used, and locking flaps 3a and 3b are provided on both side surfaces.

  The water pipe painting pig recovery device 1 having such a configuration is used, for example, as shown in FIG. That is, in the existing water supply pipe to be rehabilitated, one end portion of the main pipe 11 is a meter mounting end section 12, and for example, a branch pipe 13 for a toilet, a branch pipe 14 for a bathroom, and a branch pipe 15 for a toilet are connected to the main pipe 11. The kitchen branch pipes 16 are connected in a branched state. When rehabilitating such an existing water supply pipe, the meter box is removed and a faucet or the like screwed to the end of each branch pipe is removed.

  In the rehabilitation work, as in the past, after the existing water supply pipe is dried, the rust and other deposits are removed by a cleaning process, and then the painting process is continued. There is a description of these details.

  Then, immediately before the coating step, the connecting cylinder 4 of the water pipe painting pig recovery device 1 is connected to the meter mounting end 12 of the existing water pipe via a hose 17 having a required length. In this case, the inner diameter of the hose 17 to be used is approximately the same as the outer diameter of the main pipe 11 in the water supply pipe, and is selected to have a thickness that allows the pig used for painting to pass through without resistance. . In addition, as a pig to be used, for example, a silicon material to which paint is difficult to adhere and having a hardness of about 30 ± 5 and having a spherical surface with a smooth surface, the diameter is the water supply to be painted. It is formed to have a small diameter of about −0.4 to −1 mm with respect to the inner diameter of the tube.

  Even when the water pipe painting pig recovery device 1 is attached in this way, the muffler 8 is open (open) to the outside air, and in this open state, the existing water pipe is painted. Work pipes (not shown) are attached in advance to the ends of the pipes 13 to 16, respectively, and an amount of paint sufficient to paint the inside of each branch pipe is put into the work pipe, and the above-mentioned is provided on the rear side. The hard, spherical pig is put in and painted.

  In this painting, first, painting is performed in order from a position close to the meter mounting end 12. That is, air of a required pressure (0.7 mp) for air supply was blown from the working pipe of the toilet branch pipe 13 and the paint was pushed out by a pig, so that the coating film was evenly formed up to the branch point of the toilet branch pipe 13. Later, the pig inevitably goes to the meter mounting end 12 side that is open to the outside, and since there is no resistance to pushing out the paint, it passes smoothly through the hose 17 and jumps out into the box body 2 vigorously.

  At this time, the popped-out pig hits the cushioning material 9 but is softly received by the cushioning action and stops in the box body 2. A popping sound is generated at the same time as the pop-out, but it is erased by the muffler muffler 8, so there is no sound outside. Is almost lost. The completion of the painting of the toilet branch pipe 13 can be automatically and immediately detected when the pig jumps into the box body 2 and the air pressure for air supply is rapidly attenuated. The end of the branch pipe 13 is plugged so that there is no air flow.

  Subsequently, the bathroom branch pipe 14 and the bathroom branch pipe 15 are sequentially coated in the same manner up to each branch point and plugged, and finally the kitchen branch pipe 16 is coated. In this case, an amount of paint that can coat the main pipe 11 from the tip of the kitchen branch pipe 16 to the meter mounting end 12 is put into the work pipe, and then a pig is put in to obtain the required pressure for air supply. Air is blown to paint.

  In these coatings, for example, the coating up to the branch pipes 13 to 15, that is, the air blowing time is at most about 4 seconds, and the coating from the longest kitchen branch pipe 16 to the meter mounting end 12 is 12 seconds. Is within. Accordingly, the painting time is relatively short, and the four pigs are recovered in the box body 2 of the recovery apparatus 1 with the plosive sound being silenced. In addition, since the cover body 3 is made of a transparent plastic, it can be immediately confirmed that four pigs are accommodated without opening the cover body 3.

  The water pipe paint collecting device according to the present invention is portable and lightweight, and can be easily connected to the meter mounting end of the water pipe using a pipe of the required length at any location. Pigs used for painting are softly received by the cushioning property of the cushioning material provided on the box body, and the muffler muffler can mute the plosive sound and collect it safely and reliably, not only for water supply pipes For example, it can be widely used for painting gas pipes and the like.

DESCRIPTION OF SYMBOLS 1 Collecting apparatus 2 Box body 3 Lid 3a, 3b Lock flap 4 Connection cylinder 5, 7 Clamp metal fitting 6 Exhaust cylinder 8 Silencer muffler 9 Buffer material 11 Main pipe 12 Meter attachment end 13 Toilet branch pipe 14 Branch pipe for bathroom 15 Branch pipe for bathroom 16 Branch pipe for kitchen 17 Hose

Claims (4)

When painting with a pig in the painting process in the rehabilitation work of an existing water pipe, the pig is collected immediately after painting.
A cylinder for connection with the existing water supply pipe is provided on the front side of the box body having an openable / closable lid, and an exhaust cylinder is provided on one side surface.
Inside the back side of the box body, a cushioning material of a required thickness that cushions the impact caused by the jumping out of the pig is detachably disposed,
An apparatus for collecting a pig for painting a water supply pipe, characterized in that a muffler muffler that muffles a plosive sound caused by a pig popping out is attached to the exhaust cylinder. Before Kifuta body, pig recovery apparatus for a water supply pipe paint according to claim 1, characterized in that it is made of transparent plastic. 2. The apparatus for collecting a water pipe painting pig according to claim 1, wherein the connection between the water pipe and the connecting cylinder is a hose having a required length. The pipe collecting device for collecting water pipes according to claim 1, wherein a clamp fitting is provided on the connecting cylinder and the exhaust cylinder.

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