JP6574596B2 - Lining device and lining method for inner surface of tubular body - Google Patents

Description

  The present invention relates to a lining apparatus and a lining method for regenerating an inner surface that has been corroded and deteriorated by using a tubular body for a long period of time by resin coating.

As a method of rehabilitating a corroded pipe inner surface by resin coating, the invention described in the following Patent Document 1 is such that a front pig and a rear pig are inserted into a rope passed through the tubular body, and the rope is drawn into the tubular body. Then, a synthetic resin is filled between both pigs, and the resin is lined on the inner wall surface of the pipe by pulling the pig directly with a rope.
Next, the invention described in Patent Document 2 relates to an inner surface coating having a branch pipe in the middle of a mother pipe, and a coating material is filled between a pair of pigs while the branch portion is sealed with a seal body.

The invention described in Patent Document 3 is a method for coating the inner surface of a tubular body having a breathability and an elastic pig ball having a branching and different diameter.
In either case, a rope is inserted into a pair of separated pigs, and the pig is moved by pulling directly with the rope.

JP 2002-233818 A JP 2004-316698 A JP 2004-313856 A

In each of the lining device and the lining method described in Patent Documents 1 to 3, a pair of spaced apart pigs are directly inserted through a wire and connected by pulling the wire, thereby pulling the resin downstream in the pulling direction. It is made to flow out from the side and coats the inner surface of the pipe, and is configured so that the distance between a pair of pigs connected to each other by a wire is reduced.
In any of the patent documents, each pig is connected by a wire, and the traction force of the wire is directly applied to the pig. The traction force damages the pig, and it is difficult to uniformly coat the inner surface of the pipe.

Therefore, the present invention wraps a pig with a net so that the net and the pig can move relative to each other so that the pig can be freely deformed during movement of the pig so that no external force is applied to the pig.
Note that there are cases where the pig moves by compressed air, when the net itself is pulled, and both. In any case, no external force is applied to the pig during towing.

According to the present invention, the front pig (1) and the rear pig (2) that are elastically deformable are arranged apart from each other in the tubular body, and the lining material (3) is accommodated between the pigs. In a lining device that moves inside the tubular body and lines the inner surface of the tubular body with a resin material,
Both pigs (1) and (2) are housed in a single cylindrical net (4) with both ends closed, and the pig (1) (2) and the net (4) are connected within the net (4). A lining device for an inner surface of a tubular body, which is arranged to be relatively movable.

According to the present invention, the front pig (1), the intermediate pig (5), and the rear pig (2) that are respectively elastically deformable are arranged in the tubular body, and each pig (1) ( 5) In the lining device for storing the lining material (3) between (2), moving in the tubular body, and lining the inner surface of the tubular body with a resin material,
Each pig (1) (5) (2) is housed in one cylindrical net (4) closed at both ends, and each pig (1) (5) (2) in that net (4) And a net (4) are arranged so as to be relatively movable.

According to the third aspect of the present invention, a front pig (1), an intermediate pig (5), and a rear pig (2), which are respectively elastically deformable, are disposed in the tubular body, and each pig (1) is arranged. (5) In the lining device for storing the lining material (3) between (2) and lining the inner surface of the tubular body with a resin material,
Each pig (1) (2) is housed in a cylindrical first net (4) and a second net (6) closed at both ends, and an intermediate pig (5) is placed in the second net (6). Similarly, both nets (4) and (6) are connected by a flexible connecting material (7), and in each of the nets (4) and (6), each pig (1) (5) (2) And a net (4) and (6) are lining devices for the inner surface of a tubular body in which relative movement is arranged.

According to the present invention, the front pig (1), the intermediate pig (5), and the rear pig (2) that are respectively elastically deformable are arranged in the tubular body and are separated from each other. (5) In the lining device for storing the lining material (3) between (2) and lining the inner surface of the tubular body with a resin material,
The rear pig (2) is housed in a cylindrical net (4) closed at both ends, and the intermediate pig (5) is also housed in the net (4), and can be accommodated in the front pig (1) not housed in the net. Insert the flexible traction material (9), connect the traction material (9) to the net (4), the front pig (1) is movable on the traction material (9), and the rear pig (2) This is a lining device for the inner surface of the tubular body in which the intermediate pig (5) and the net (4) are arranged to be relatively movable.

The present invention according to claim 5, in any one of claims 1 to 4,
Each pig (1) (2) (5) is made of closed-cell urethane semi-rigid having airtightness, in that the foam density is ^{0.05~0.15 (g / cm 3),} 40% foam compressive hardness 100 to 800 ( N) Yes, with rebound resilience of 20-50 (%) and a hardness measured with Asker rubber hardness meter C type of 1-15,
Each of the nets (4) and (6) is a lining device for an inner surface of a tubular body, which is a fiber material connected or integrated in a net shape.

According to a sixth aspect of the present invention, in the lining device according to the fifth aspect ,
Each net (4) (6) is formed of a chemical fiber, natural fiber, or a combination thereof, and is formed into a cylindrical shape, and the opening at both ends thereof is closed or blocked by one or more of crimping, welding, and bonding. This is a lining device for the inner surface of a tubular body.

The present invention described in claim 7 is a method for lining a tubular body inner surface using the lining device according to any one of claims 1 to 3 or claim 5 or claim 6 .
This is a method of lining the inner surface of a tubular body, wherein the movement of the pigs (1), (2) and (5) is performed by pressurized air pressure.

The present invention according to claim 8 is a lining method for lining a tubular body inner surface using the lining device according to any one of claims 1 to 6 ,
A tubular body in which a flexible traction material (9) is attached to the net (4) and the traction material (9) is moved to move the pig (1), (2), and (5) to perform lining. It is a surface lining method.

The present invention according to claim 9 is a lining method for lining a tubular body inner surface using the lining device according to any one of claims 1 to 6 ,
The pig (1), (2), and (5) are moved by pressurized air pressure, and a flexible traction material (9) is attached to the net (4) to move the traction material (9). Thus, the method is a lining method for the inner surface of the tubular body, in which the pigs (1), (2), and (5) are moved to perform lining.

A tenth aspect of the present invention is the lining method according to any one of the seventh to ninth aspects,
In the case where the branched portion (10) exists in the tubular body,
The inlet (12) of the branch section (10) is closed with a branch closing pig (11), and pressurized air is supplied to the branch section (10) to connect the branch closing pig (11) to its inlet (12). This is a method of lining the inner surface of a tubular body, which is performed while being held.

The present invention according to claim 11 is the lining method according to any one of claims 7 to 9 ,
In the case where the branched portion (10) exists in the tubular body,
The tubular body is formed by closing the inlet (12) of the branch part (10) with the branching closing pig (11) and holding the closing pig (11) at the inlet (12) via the support rod (13). It is a surface lining method.

The present invention according to claim 12 is the lining method according to any one of claims 7 to 11 ,
This is a method of lining an inner surface of a tubular body, which is performed while elastically deforming a pig within a net at a position where the tubular body diameters are different.
According to a thirteenth aspect of the present invention, a front pig (1) and a rear pig (2) that are elastically deformable are disposed in the tubular body, and are lined between the pigs (1) and (2). Store the material (3),
Both pigs (1) and (2) are housed in cylindrical first and second nets (4) and (6) each closed at both ends, and in each net (4) and (6), each pig ( 1) A lining device in which (2) and nets (4) and (6) are arranged so as to be relatively movable and the first and second nets (4) and (6) are connected by a flexible connecting material (7). The lining device is moved through the tubular body, and the inner surface of the tubular body is lined with a resin material,
In the case where the branched portion (10) exists in the tubular body,
This is a method for lining the inner surface of a tubular body, wherein the inlet (12) of the branch part (10) is closed with the closing pig (11) for branching and the closing pig is held at the inlet via the support rod (13). .
According to the present invention, a front pig (1) and a rear pig (2) that are respectively elastically deformable are arranged in a tubular body and spaced apart from each other, and a lining is provided between the pigs (1) and (2). Store the material (3),
Only the rear pig (2) is housed in a cylindrical net (4) that is closed at both ends, and a flexible pulling material (9) is inserted through the front pig (1) that is not housed in the net. (9) is connected to the net (4), the front pig (1) is movable on the traction material (9), and the rear pig (2) and net (4) are arranged to be relatively movable Using the apparatus, the lining apparatus moves in the tubular body, and the inner surface of the tubular body is lined with a resin material,
In the case where the branched portion (10) exists in the tubular body,
This is a method for lining the inner surface of a tubular body, wherein the inlet (12) of the branch part (10) is closed with the closing pig (11) for branching and the closing pig is held at the inlet via the support rod (13). .

  According to the present invention of claim 1, a pair of pigs (1) (2) is housed in a cylindrical net (4) closed at both ends, and the pig (1) ( 2) and the net (4) are arranged so as to be relatively movable. Therefore, the pigs (1) and (2) can freely move in the net (4). And the deformation | transformation of each pig becomes easy and resin coating is performed smoothly and uniformly. Further, even if the net (4) moves, no external force is applied to each pig (1) (2). Therefore, the damage of the pig is prevented and the device has a long life.

  In the invention according to claim 2, the front pig (1), the intermediate pig (5), and the rear pig (2) are housed in a single cylindrical net (4) closed at both ends, and the net In (4), the pigs (1), (5), (2) and the net (4) are arranged to be relatively movable. Therefore, three or more pigs (1) (5) (2) can move freely in the net, each pig can be easily deformed, and the coating material (3) is held between each pig, The resin can be efficiently coated on the inner surface of the pipe.

According to the third aspect of the present invention, the front pig (1) and the rear pig (2) are respectively housed in the cylindrical first net (4) and second net (6) closed at both ends, The pig (5) is also housed in the second net (6), and the two nets are connected by a flexible connecting material (7). Therefore, the interval between both nets can be set freely, and the amount of coating material can be set freely. At the same time, the gap between the pipe and the pig is freely filled by deformation of at least three or more different pigs.

In the invention according to claim 4 , the rear pig (2) is housed in the net (4), and the intermediate pig (5) is also housed in the net (4), and the front pig (1) not housed in the net. A flexible traction material (9) is inserted through, and the traction material (9) is connected to the net (4) so that the front pig (1) is movable on the traction material (9) and each pig ( 2) (5) and the net (4) are arranged so as to be relatively movable. Therefore, the interval between both nets can be set freely, and the amount of coating material can be set freely. The inner surface of the pipe can be efficiently resin-coated by deformation of a plurality of different pigs.

Invention of claim 5, each pig consists independent foam urethane semirigid an airtight, in that the foam density is ^{0.05~0.15 (g / cm 3),} 40% foam compressive hardness 100 to 800 ( N), having a rebound resilience of 20 to 50 (%) and a hardness of 1 to 15 as measured with an Asker rubber hardness tester C type, and the net is a fiber material connected or integrated in a net shape. . Under these conditions, the deformation of the pig is facilitated, and smooth resin coating can be performed without damaging the pig.

In the invention according to claim 6 , as a material of each net, any one of chemical fiber, natural fiber, or a combination thereof is formed into a cylindrical shape, and the opening at both ends is tied or any one of crimping, welding, and bonding. It is obstructed by one or more. Thereby, the device can be easily manufactured.

In the method for lining the inner surface of the tubular body according to the seventh aspect of the present invention, the pig is moved by pressurized air pressure. Thereby, each pig can be moved smoothly and resin coating can be performed.

According to the eighth aspect of the present invention, a flexible traction material (9) is attached to a net, and the traction material (9) is moved to move each pig and perform lining. For this reason, when the air pressure cannot be used in a damaged or branched pipe, each pig can be moved in conjunction with towing. At this time, no external force is applied to the pig, and the damage can be prevented.

According to the method of claim 9 , the pig is moved by pressurized air pressure, a flexible traction material (9) is attached to the net, and the traction material (9) is moved to move each pig. Is used for lining. Thereby, each pig can be moved smoothly and the movement control of a pig can be performed easily.

According to the method of claim 10 , the branch inlet (12) is closed with a branch closing pig (11) and pressurized air is supplied to the branch to close the blocking pig (11) at its inlet (12). ).
Therefore, it is possible to prevent the lining material from flowing out from the branching portion and perform smooth resin coating.

According to the method of claim 11 , the branch inlet (12) is closed with a branch closing pig (11), and the closing pig (11) is connected to the inlet (12) via a support rod (13). It is to hold. This makes it possible to perform resin coating while reliably closing the inlet (12) of the branch portion.

According to the twelfth aspect of the present invention, the pig is elastically deformed in the net at a position where the pipe diameter is different. Thereby, the different diameter part can be smoothly resin-coated.
The inventions described in claims 13 and 14 are based on the effects of the invention described in claim 11.

In the first stage of coating the inner surface of the tubular body (21) by the lining device of the present invention, compressed air (18) is added to the rear pig (2) to move the pair of pigs (1) (2). Show things. The second stage is shown. In another embodiment, the inner surface of the tubular body (21) is coated by the lining device of the present invention, and the traction material (9) is attached to the fastening end (15) of the net (4) that wraps the pig (1) (2). In this example, the lining is performed by pulling them with a pulling force (20) in the direction of an arrow. In another embodiment of the lining device of the present invention, a pig (1) (5) (2) is arranged in an elongated net (4), and the pig (2) is moved to the right by compressed air (18). To move to. The pigs (1) and (2) are individually stored in the nets (4) and (6), and the nets (4) and (6) are connected to each other by the connecting material (7). The pig (2) is moved to the right by the compressed air (18). Furthermore, according to another embodiment of the present invention, the pig (2) (5) is housed in the elongated net (6), and the pig (1) alone is housed in the net (4) at the front thereof. The nets (4) and (6) are connected by the connecting material (7). The pig is moved by the compressed air (18). Furthermore, in another embodiment of the present invention, this example is different from the example of FIG. 1 in that the traction material (9) is connected to the fixed end (15) of the net, and the traction material (9) is directed to the right. By pulling, the pigs (1) and (2) are moved to the right. FIG. 7 is a modified example in which three pigs (1), (5), and (2) are housed in an elongated net (4), and a traction member (9) is connected to them so that each pig moves to the right. Is. In this example, the pigs (1) and (2) are individually stored in the nets (4) and (6), and the fastening ends (15) of the nets (4) and (6) are connected by the connecting material (7). It is a thing. Then, the pulling material (9) is fixed to the net (4) in which the pig (1) is housed, whereby each pig moves to the right. In this example, the pig (1) is housed alone in the net (4), the pair of pigs (2) (5) is housed in the net (6), and the connection between the nets (4) and (6) ( Connected in 7). At the same time, the traction material (9) is fixed to the fixed end (15) of the net (4), and each pig moves to the right. In this example, only the pig (2) is housed in the net (4), the traction material (9) inserted through the pig (1) placed in front is fixed to the net (4), and the traction force (20) It is a tow. The pig (1) can move freely on the traction material (9). The pair of pigs (2) and (5) is housed in the net (4), and the pig (1) arranged in front is positioned alone in the pipe. Then, the traction material (9) inserted through the pig (1) is fixed to the net (4) and moved to the right by the traction force (20). The pig (1) can move freely on the traction material (9). Furthermore, it is another embodiment of the present invention, in which the fixed end (15) of the net (4) is connected to the traction material (9) and pulled to the right, and compressed to the pig (2) side. Air (18) is supplied and it moves to the right. The pigs (1), (5) and (2) are housed in the net (4), and these three pigs move to the right by the traction material (9) and the compressed air (18). The pigs (1) and (2) are individually housed in the nets (4) and (6), and the nets (4) and (6) are connected by the connecting material (7) and pulled by the net (4). The material (9) is connected. Then, each pig moves to the right by the traction material (9) and the compressed air (18). A pair of pigs (2) and (5) are housed in an elongated net (6), and the front pig (1) is housed alone in the net (4), and each net (4) and (6) is connected to a connecting member (7 ) And the traction material (9) is connected to the net (4). Each of the pigs moves to the right by the traction material (9) and the compressed air (18). In yet another embodiment, only the pig (2) is stored in the net (4), and the pig (1) is disposed in the front of the tubular body (21) without being stored in the net, and the front pig (1) The traction material (9) inserted through is fixed to the net (4) and moved to the right by the traction force (20) and the compressed air (18). In this example, the pigs (2) and (5) are housed in an elongated net (4), and the pig (1) is placed in the front of the tubular body (21) without being housed in the net. The traction member (9) inserted through the pig (1) is fixed to the net (4) and moved to the right by the traction force (20) and the compressed air (18). This is another embodiment of the present invention, in which a plurality of branch pipes (17) are connected to a tubular body (21). The inlet (12) of the branching portion is closed with a branch closing pig (11), and compressed air (18) is supplied to hold the branch closing pig (11) on the tubular body (21) side. Alternatively, the branching closing pig (11) is held on the inlet side of the branch pipe (17) via the support rod (13).

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram for performing resin coating on the inner surface of the tubular body (21). In this example, the front pig (1) and the rear pig (2) are separated from each other and connected by a net (4).
The pigs (1) and (2) are elastically deformable, and as an example, are made of airtight semi-rigid independent foam urethane. The firing density is 0.05 to 0.15 (g / cm ³ ), the compression hardness of 40% firing is 100 to 800 (N), and the resilience is 20 to 50 (%). Furthermore, the hardness measured by Asker rubber hardness tester C type is formed with 1-15.

Next, the net (4) is formed of an elongated cylindrical shape whose both ends are fixed by the fixed ends (15). The net (4) is formed of either a chemical fiber or natural fiber, or a combination thereof, and both ends of the cylindrical shape are closed by any one or more of binding, pressure bonding, welding, and adhesion.
The diameters of the pigs (1) and (2) are about 1.0 to 2.0 times the inner diameter of the piping (21) to be lined.
The mesh of the net (4) is formed of about 1 to 25 mesh.
In this example, the pigs (1) and (2) are stored in the net (4), and the lining material (3) is stored between the pigs (1) and (2).

In this example, the pigs (1) and (2) are moved to the right by the compressed air (18).
At this time, the interval between the pigs (1) and (2) is gradually reduced, and the interval between the two changes from the state of FIG. 1 to the state of FIG. With this movement, the inner surface of the tubular body (21) is covered with the resin film (22) by the resin that flows backward from the pig (2).

In the embodiment of FIGS. 1 and 2, the pair of pigs (1) and (2) are moved from the left to the right by the compressed air (18). However, in the embodiment of FIG. 9) Pull to the right and move the pigs (1) and (2) to the right.
That is, the pig (1) (2) is movably accommodated in the cylindrical net (4), and the pulling material (9) is connected to the fixed end (15) of the end of the net (4). . And it is pulled in the direction of tensile force (20). Accordingly, the pig (1) gradually moves to the pig (2) side. Then, the resin is allowed to flow out behind the pig (2) to form a resin film (22) on the inner surface of the tubular body (21).
At this time, the pig (1) gradually moves to the pig (2) side with the movement of the traction material (9), and the space between the pigs (1) and (2) gradually decreases. Even in this example, the pig (1) (2) moves freely in the net (4), and the diameter of the pig (1) (2) changes with the change of the inner diameter of the tubular body (21). To do.

Next, each example of FIGS. 4 to 6 moves the pigs (1), (5), and (2) to the right by compressed air (18).
First, in the example of FIG. 4, three pigs (1), (5) and (2) are stored in the net (4), and they are moved rightward in the tubular body (21) by the compressed air (18). It is something that moves. Also in this example, pigs (1), (5), and (2) move freely within the net (4). Therefore, even if the inner diameter of the tubular body (21) changes, each pig deforms following it.
Further, even when the compressed air (18) is pressurized, each pig is freely elastically deformed in the net (4) according to the pressure and the diameter of the tubular body (21).

Next, in the example of FIG. 5, the pigs (1) and (2) are individually housed in the nets (4) and (6), and they are connected by a connecting material (7). Then, compressed air (18) is supplied to the pig (2) side, whereby the pigs (1) and (2) move in the tubular body (21). Also in this example, the pigs (1) and (2) can move relative to the nets (4) and (6).
That is, each pig is freely deformed in the nets (4) and (6) by the change of the tubular body (21) and the pressing force of the compressed air (18).

  Next, in the example of FIG. 6, a pair of pigs (2) and (5) are housed in an elongated net (6), and another pig (1) is housed alone in another net (4). The upstream net (4) and the downstream net (6) are connected by a connecting material (7). Also in this example, each pig moves to the right by the compressed air (18).

Next, FIGS. 7 to 12 show the movement of the pigs (1), (5), and (2) with the traction material (9).
In FIG. 7, a pair of pigs (1) and (2) are movably accommodated in the net (4), and the fastening end (15) of the net (4) is fastened to the traction material (9). . Then, the tow material (9) is pulled to the right, and the pigs (1) and (2) move in the tubular body (21). Along with the movement, the pig (1) gradually moves to the pig (2) side in the net (4), and the lining material (3) is gradually discharged to the rear of the pig (2), so that the tubular body (21) Lining the inner surface.

In the example of FIG. 8, pigs (1), (5), and (2) are housed in a cylindrical net (4), and moved to the right in the drawing by the traction material (9).
In the example of FIG. 9, the pigs (1) and (2) are individually stored in the nets (4) and (6), and the nets (4) and (6) are connected by the connecting material (7). The other stationary end (15) of the net (4) is connected to the traction member (9), and both pigs move to the right. At this time, the pigs (1) and (2) are freely deformed in the nets (4) and (6), and move relative to the nets (4) and (6).

Next, in the example of FIG. 10, a pair of pigs (2) and (5) are housed in a cylindrical net (6), and the other pig (1) is housed in the net (4) alone. And each net | network (4) (6) is connected with the connection material (7), and the traction material (9) and the net | network (4) are connected. And each pig moves to the right by the traction material (9).
Next, in the example of FIG. 11, only the pig (2) is stored in the net (4), and the pig (1) is not stored in the net. The net (4) is connected to the traction material (9) inserted through the pig (1), and the pig (1) can freely move on the traction material (9). The lining material (3) is accommodated between the pigs (1) and (2), and the inner surface of the tubular body (21) is coated by moving the traction material (9) to the right.

  Next, FIG. 12 shows still another embodiment of the present invention. In this example, a pair of pigs (2) and (5) is housed in the net (4), and the pig (1) is arranged on the upstream side thereof. ing. This pig (1) is not stored in the net, the towing material (9) inserted through the pig (1) is connected to the net (4), and the pig (1) can freely move on the towing material (9). Can move. The lining material (3) is stored between the pigs (1), (5), and (2), and the inner surface of the tubular body (21) is coated by pulling the traction material (9) to the right. is there.

Next, FIG. 13 to FIG. 19 show that the pigs (1), (5), and (2) are moved by pulling the pulling material (9), and compressed by compressed air (18) from the downstream side thereof. Is to move.
Therefore, in the example of FIG. 13, the pigs (1) and (2) are housed in the net (4), the fixed end (15) of the net (4) is connected to the traction material (9), and the downstream side. The pressure of the compressed air (18) is applied to the pig (2) located on the side. The lining material (3) is accommodated between the pigs (1) and (2), and the pigs are moved to the right by the traction material (9) and the compressed air (18). Even in this case, the pig (1) (2) is disposed so as to be relatively movable in the net (4), and the shape of the pig can be deformed according to the inner diameter of the tubular body (21). is there.
In this way, the pigs (1) and (2) are moved by both the compressed air (18) and the traction material (9), thereby facilitating the deformation of each pig and increasing the conveying force of the lining material (3). It is possible to improve and rapidly coat the inner surface of the tubular body (21).

Next, in the example of FIG. 14, the pigs (1), (5) and (2) are stored in the net (4), and the traction material (9) is fixed to the fixed end (15) of the net (4). At the same time, compressed air (18) is added to the pig (2). Then, the lining material (3) is supplied between the pigs (1), (5), and (2), and the net (4) and each pig are moved to the right by the compressed air (18) and the traction material (9). Each pig can be transformed independently.
Next, FIG. 15 shows still another example of the present invention. In this example, the pigs (1) and (2) are separated from each other and individually housed in the nets (4) and (6). (4) The fixed ends (15) of (6) are connected to each other by the connecting material (7), and the traction material (9) is fixed to the net (4). Then, compressed air (18) is supplied to the pig (2) side, and the pulling member (9) is pulled rightward to coat the inside of the tubular body (21).

  Next, in FIG. 16, a pair of pigs (2) and (5) are housed in an elongated net (6), and the pig (1) arranged on the upstream side thereof is housed alone in the net (4). The pulling material (9) is connected to the net (4), and the nets (4) and (6) are connected by the connecting material (7). Then, compressed air (18) is supplied to the pig (2) side and pulled to the right by the pulling material (9). A lining material (3) is housed between the pigs (1), (5), and (2) to coat the inner surface of the tubular body (21).

FIG. 17 shows still another example of the present invention. In this example, only the pig (2) is stored in the net (4), and the pig (1) is not stored in the net. The net (4) is connected to the pulling member (9) inserted through the pig (1), and the respective pulling force (20) is moved to the pig (2) by compressed air (18). The pig (1) can move freely on the traction material (9).
FIG. 18 shows still another example of the present invention. In this example, the pigs (2) and (5) are stored in the net (4), and the pig (1) is not stored in the net. The net (4) is connected to the pulling material (9) inserted through the pig (1) and pulled, and the compressed air (18) is supplied to the pig (2) side, and the compressed air (18) and the pulling Each pig moves to the right by the material (9). The lining material (3) is supplied between the pigs (1), (5) and (2).

Next, FIG. 19 shows still another example of the present invention, in which a plurality of branch pipes (17) are connected to the tubular body (21). In this case, the inlet (12) of each branch pipe (17) is shown. ) Is provided with a branch closing pig (11). Then, compressed air (18) is supplied to the branching closing pig (11), and the branching closing pig (11) is held in that position.
In this example, the branch closing pig (11) is held at the position of the inlet (12) by the support rod (13) instead of the compressed air (18). In this example, the pigs (1) and (2) are moved by the compressed air (18) and the traction material (9). Then, the lining material (3) is accommodated between the pigs (1) and (2), and each pig is moved to the right. At this time, since the branching pigs (11) are arranged at the inlet (12) of the branch pipe (17), when each pig passes through the branch, the lining material (3) is separated from the branching pigs (11). ) There is no leakage to the side.

  In these examples, each pig moves to the right with the pigs (1) and (2) stored in the net (4). Then, the inner surface of the tubular body (21) is coated while each pig is deformed at the open end of the branch pipe (17). Along with the coating, the pig (2) moves in the net (4) by the compressed air (18) to the pig (1) side. Then, the coating material (3) is extruded from the periphery of the pig (2) and is gradually supplied to the inner surface of the tubular body (21) to perform coating.

(Modification)
In each of the above examples, the tubular body (21) has been described as having a constant diameter. However, the present apparatus and the present method are also applied to a case where there is a different-diameter portion whose diameter changes in the middle of the pipe. .
That is, when there is a different diameter portion with a reduced diameter in the middle or end of the tubular body (21), the pig (1) (2) is deformed according to the diameter and passes therethrough, and the different diameter portion. The part can be coated with the lining material (3). At this time, the pigs (1) and (2) can be easily deformed because they are respectively deformable with respect to the net (4). Since the pigs (1) and (2) are movable with respect to the net (4), the traction force of the traction material (9) is not applied to each pig. Therefore, smooth piping coating can be performed without damaging each pig with the coating.

The present invention is applied to a coating on the inner surface of a pipe.

DESCRIPTION OF SYMBOLS 1 Front pig 2 Back pig 3 Lining material 4 Net 5 Intermediate pig 6 Net 7 Connecting material 9 Traction material 10 Branching part 11 Branching block pig

12 Inlet 13 Support rod 15 Fastening end 17 Branch pipe 18 Compressed air 20 Tensile force 21 Tubular body 22 Resin film

Claims (14)

Separated from each other in the tubular body, an elastically deformable front pig (1) and a rear pig (2) are arranged, and a lining material (3) is accommodated between both pigs, and the tubular body is moved to move inside the tubular body. In lining equipment that lines the surface with resin material,
Both pigs (1) and (2) are housed in a single cylindrical net (4) with both ends closed, and the pig (1) (2) and the net (4) are connected within the net (4). A lining device for an inner surface of a tubular body, wherein the lining device is arranged to be relatively movable. A front pig (1), an intermediate pig (5), and a rear pig (2) that are elastically deformable are arranged apart from each other in the tubular body, and a lining material (between each pig (1) (5) (2) ( 3) In a lining device that accommodates, moves through the tubular body, and lines the inner surface of the tubular body with a resin material,
Each pig (1) (5) (2) is housed in one cylindrical net (4) closed at both ends, and each pig (1) (5) (2) in that net (4) And the net (4) are arranged so as to be relatively movable, a lining device for the inner surface of the tubular body. A front pig (1), an intermediate pig (5), and a rear pig (2), which are elastically deformable, are arranged apart from each other in the tubular body, and a lining material is provided between each pig (1) (5) (2). In the lining device for storing (3) and lining the inner surface of the tubular body with a resin material,
Each pig (1) (2) is housed in a cylindrical first net (4) and a second net (6) closed at both ends, and an intermediate pig (5) is placed in the second net (6). Similarly, both nets (4) and (6) are connected by a flexible connecting material (7), and in each of the nets (4) and (6), each pig (1) (5) (2) A lining device for the inner surface of a tubular body in which a net and a net (4) (6) are arranged to be relatively movable. A front pig (1), an intermediate pig (5), and a rear pig (2), which are elastically deformable, are arranged apart from each other in the tubular body, and a lining material is provided between each pig (1) (5) (2). In the lining device for storing (3) and lining the inner surface of the tubular body with a resin material,
The rear pig (2) is housed in a cylindrical net (4) closed at both ends, and the intermediate pig (5) is also housed in the net (4), and can be accommodated in the front pig (1) not housed in the net. Insert the flexible traction material (9), connect the traction material (9) to the net (4), the front pig (1) is movable on the traction material (9), and the rear pig (2) A lining device for an inner surface of a tubular body in which an intermediate pig (5) and a net (4) are arranged to be relatively movable. In any one of Claims 1-4 ,
Each pig (1) (2) (5) is made of closed-cell urethane semi-rigid having airtightness, in that the foam density is ^{0.05~0.15 (g / cm 3),} 40% foam compressive hardness 100 to 800 ( N) Yes, with rebound resilience of 20-50 (%) and a hardness measured with Asker rubber hardness meter C type of 1-15,
Each of the nets (4) and (6) is a lining device for the inner surface of a tubular body in which fiber materials are connected or integrated in a net shape. The lining device according to claim 5 , wherein
Each net (4) (6) is formed of a chemical fiber, natural fiber, or a combination thereof, and is formed into a cylindrical shape, and the opening at both ends thereof is closed or blocked by one or more of crimping, welding, and bonding. A lining device for the inner surface of a tubular body. In the method of lining the inner surface of the tubular body using the lining device according to any one of claims 1 to 3 or claim 5 or claim 6 ,
A method for lining an inner surface of a tubular body, wherein the movement of the pigs (1), (2), and (5) is performed by pressurized air pressure. In the lining method which performs lining of the tubular body inner surface using the lining apparatus in any one of Claims 1-6 ,
A tubular body in which a flexible traction material (9) is attached to the net (4) and the traction material (9) is moved to move the pig (1), (2), and (5) to perform lining. Surface lining method. In the lining method which performs lining of the tubular body inner surface using the lining apparatus in any one of Claims 1-6 ,
The pig (1), (2), and (5) are moved by pressurized air pressure, and a flexible traction material (9) is attached to the net (4) to move the traction material (9). By this, the method for lining the inner surface of the tubular body, in which the pigs (1), (2) and (5) are moved for lining. A lining method according to any one of claims 7 to 9 ,
In the case where the branched portion (10) exists in the tubular body,
The inlet of the branching section (10) is closed with the branching blocking pig (11), and pressurized air is supplied to the branching section (10) to hold the branching blocking pig (11) at the inlet (12). A method for lining the inner surface of a tubular body. A lining method according to any one of claims 7 to 9 ,
In the case where the branched portion (10) exists in the tubular body,
A method for lining an inner surface of a tubular body, wherein an inlet (12) of a branching section (10) is closed with a branching closing pig (11) and the closing pig is held at the inlet via a support rod (13). In the lining method in any one of Claims 7-11 ,
A method of lining an inner surface of a tubular body, wherein the pig is elastically deformed in a net at a position where the diameters of the tubular body are different. Separated from each other in the tubular body, an elastically deformable front pig (1) and a rear pig (2) are arranged, and a lining material (3) is stored between both pigs (1) and (2) ,
Both pigs (1) and (2) are housed in cylindrical first and second nets (4) and (6) each closed at both ends, and in each net (4) and (6), each pig ( 1) A lining device in which (2) and nets (4) and (6) are arranged so as to be relatively movable and the first and second nets (4) and (6) are connected by a flexible connecting material (7). The lining device is moved through the tubular body, and the inner surface of the tubular body is lined with a resin material,
In the case where the branched portion (10) exists in the tubular body,
A method for lining an inner surface of a tubular body, wherein an inlet (12) of a branching section (10) is closed with a branching closing pig (11) and the closing pig is held at the inlet via a support rod (13) . Separated from each other in the tubular body, an elastically deformable front pig (1) and a rear pig (2) are arranged, and a lining material (3) is stored between both pigs (1) and (2) ,
Only the rear pig (2) is housed in a cylindrical net (4) that is closed at both ends, and a flexible pulling material (9) is inserted through the front pig (1) that is not housed in the net. (9) connected to the Internet (4), the front pig (1) is freely moved on the traction member (9), and lining the rear and pig (2) and the Internet (4) are arranged relatively movable Using the apparatus, the lining apparatus moves in the tubular body, and the inner surface of the tubular body is lined with a resin material,
In the case where the branched portion (10) exists in the tubular body,
A method for lining an inner surface of a tubular body, wherein an inlet (12) of a branching section (10) is closed with a branching closing pig (11) and the closing pig is held at the inlet via a support rod (13) .

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