JPS60139360A - Resin conveying pig for repairing pipe joint part of existing pipe - Google Patents

Abstract

PURPOSE:To safely move a pig even if a connection part is broken, by using a relatively hard rubbery material as the core material of the central part of the pig and connecting a leading end barrel piece and a mian body barrel piece in such a state that an embedded plate is interposed between both barrel pieces. CONSTITUTION:Pigs 2, 3 are formed of flexible rubbery material and each of them is divided into a plural pieces such as a leading end barrel piece 32 and a main body barrel piece 23 while an embedded plate 39 is interposed between the leading end barrel piece 32 and the main body barrel piece 34 to connect both of them in a columnar shape and a traction cable 4 is secured to the embedded plate 39 and the outer peripheral part of the main body barrel piece is constituted of a soft material and the central part is constituted of a hard material. By this structure, even when the securing and connection with the traction cable are broken in the intermediate part of the pig, the pig is compressed by friction resistance with the inner wall and the abrupt increase of friction resistance is prevented and the pig is safely taken out to the outside.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention is designed to move resin along the inside of the pipe and repair the gap between the pipe joints when repairing the pipe joints of existing vessels that are mainly underground. This relates to a resin conveyor pipe for repairing pipe joints that performs the function of filling pipes into pipes. Existing pipe odor

[This means that the joint of the pipe joint is exposed to the load of vehicles passing over the pipe, earthquakes, etc.
Alternatively, due to changes in the joint condition over time, gaps may appear in the joint, or the constituent materials of the joint may deteriorate, causing leakage. J! pipe joint part of existing pipe! II! It is considered to repair from the inside of the pipe while it is still in its original condition.As a type of this repair method, existing color
Repair to a specified length? Insert a pig that slides into the existing pipe in the repair section from one separation opening in airtight contact with the inner surface of the cylinder with resin placed on the liζ1 side of the pig, and In the process of applying pressure to the resin from the traveling direction 11'I side and pulling it with the whole pig rope, moving inside the pipe toward the other separation amount 1] part,
A method for repairing pipe joints has been proposed in which resin is sequentially filled into the gaps between a plurality of pipe joints intervening and covering an existing pipe. In addition, apply the resin along the inside of the pipe by applying the above repair type 15.)
Regarding the pig to be transferred, a groove for filling with resin and a groove for replacing it are provided on the circumference of the pig, and the resin is placed on the front side of the pig through both grooves, and the resin is poured into the gap of the pipe joint. It has been proposed that the pig is replaced and filled with resin at 1°C. -Ln1 must be open facing the pipe joint while the tow rope is being pulled, so the towing speed of the tow rope is 1i2! Shite,
It can be formed into a circle + 1 shape with a length equivalent to the pig itself. What's more, this pig (can't pass through the bent part of the existing pipe).
L), a relatively flexible material is used, and the tow line passes through the center of the pig and is usually secured at the front or rear end of the pig. However, when the pig is pulled by a tow line, it
The entire pig is compressed and the diameter becomes smaller, which impairs airtightness. Also, if the rear end is fixed and covered, the front side will be compressed due to frictional resistance when towing, increasing the size and reducing the sliding resistance. Increase. When the front and rear ends of the trowel are fixed to the tow rope, the front outer circumference is pulled backward by the -15 beam friction resistance and becomes smaller in diameter, while the rear side is compressed and becomes larger in diameter. It's bad. In particular, the pig has resin placed on its front side (in order to move forward, the resin enters the small diameter part on the front side, reducing the ability to replace the pig into the pipe joint). Therefore, we installed a joint point with the tow rope in the middle of the pig, and maintained airtightness by reducing the compressive force of Yowaka-F on the front side.
It is desirable to have a pig structure that maintains substantial airtightness by suppressing elongation on the rear side (rear side) and allows the pig to be pulled with little sliding resistance. [Object of the Invention] The present invention Even if for some reason the middle part of the pig is connected to the tow rope while moving the resin by towing the pig, the pig can still be moved along the existing pipe without any problem. Therefore, the purpose of the present invention is to provide a pig with a structure coated with a safety bacterium that can be pulled out from the terminal end.
It is composed of flexible rubber feed and has a tip body piece 9.
It is divided into multiple parts such as the main body body part, and the L open end body part and the main body body part J1 are connected in a cylindrical shape with a quick-fitting plate interposed between them, and the center part The outer periphery of the main body body C is made of soft material (4 size, the center part is made of hard material), and the pig is made of soft material at the rear end. [Embodiment] [2] An embodiment of the present invention will be specifically explained with reference to the drawings. Fig.'1 Figure C schematically showing the entire construction equipment
In Fig. 1, reference numeral 1 indicates an existing underground pipe to be repaired, which is connected to a cast iron pipe of a designated jurisdiction using a conventional piping method using a water supply type pipe joint 13. It is a long pipe. When removing the pipe joint 13 of the existing pipe 1, first cut the existing pipe 1 to a length suitable for repair, e.g.
0111) unit repair [Divided into 1 parts, one part 1ii11 part 11 was exposed in a pit A opened on the ground, and the other divided end 12 was exposed in a pit B also opened in the ground -1. , a pig insertion conduit 5, which will be described later, is inserted into these cutting tubes 11 and 12. Connect the pig leakage conduit 6. Then, connect the tow cable 4 through one of the VIG insertion conduits 5 and 4.
Pass it through the existing pipe 1 and pull it out from the other pig lead-out pipe 6, and then wind the end width of this tow rope 4 with a winder 9. 1) A pair of pigs 2 and 3 are attached to the existing pipe with low viscosity resin C applied to the front of the front pig 2 and joint sealing resin applied to the Oar of the rear pig 3. 1, and is pulled and moved inside the tube from the population 1111+ toward the exit side. A plurality of body pieces 21 made of a soft elastic material (for example, a hard Nedelta-prene sponge with a hardness of about 50 degrees) of 4T.
Then, a plurality of fin pieces 22 made of a hard elastic material (for example, neoprene rubber with a hardness of about 60 degrees) are joined alternately. A stud bolt 2G is placed between the front and rear support disks 24.25. 114), which consists of L'lnm L), when tightening the stud bolt 26 (=I'1).
Stiff torso C21. The fin piece 221 and the head piece 23 are integrally connected in tandem.
There is a 414-story eel in Nishimata. A hole 21 is drilled in the center through which the tow rope 4 is passed, and the front side big 2 and the tow rope 4 are connected to each other.
Clamp CI collar 28 installed on the front and rear of front pig 2
．． 29 was quickly arrived at by 'C.
．． 29 is the joint point fixed to the tow rope 4 with the clamp GJ between the seat 281+ and 29b.
These clamps (=J collars 28, 29 are preferably provided at both ends of the flexible pipe inserted into the hole 27.The pipe has the function of passing the tow rope 4, and the I] from the front to the rear) - It also functions as a pressure air supply passage. Note that this pressure air supply passage may be provided separately. Figure 7, E) Enlarged in Figure - (as shown)
A truncated cone-shaped head piece 31 made of a hard elastic material (for example, neoprene rubber with a hardness of about 60 mm) on the leading end side in the direction of movement, and a soft elastic piece 4 immediately following the truncated conical head piece 31! When connecting the truncated cone-shaped body tip piece 32 made of L (for example, a hard neoprene sponge with a hardness of about 50 degrees) and the cylindrical part II part C 33, etc., it becomes Jt, and the front 51E is connected to the rear of it. The rear body piece 34 is made of the same trA quality as the soft If elastic moon.
The hard elastic material and fin pieces 35 made of the same material are alternately connected in tandem to form 4ii6, and the entire body is held between support disks 16 and 37 provided at the front and rear ends. The support circles 1i3G and 37 are tightened with the bolts 38aJ3J and 381 provided at both ends of the ear 38. In addition, the rear support disk 37
is secured to the towline 4 by suitable means, such as clamping means. J. The above-mentioned rear side big 3 (Yo, in the case of the present invention, the trunk piece 33 having a length that accounts for at least most of the total length of the big 3 has a core part 38 made of a relatively hard rubber material in the center) The core member 3a is provided with a material 3b such as the above-mentioned hard neoprene sponge on its outer periphery.
A material is selected that has moderate followability when bending, but has sufficient resistance against elongation. Further, an embedded disk 39 fixed to the tow rope 4 is provided on the leading end side of the columnar trunk piece 33 in the direction of movement 13.
9 is hoop)-39a-C110 Pol l-(II
38a, and the distance between the front support disk 3G and the embedded disk 39 is regulated via the bolt portion 38a. This prevents the trunk end portion 32 from being compressed and deformed more than necessary. In addition, the rear pig 3 (Y, the wire 38T in the middle is the circle that forms the main body of the L and A that are tensioned), and the length of the body H33 is regulated while moving inside the pipe, and the overall length is Even if the pipe is formed to be long relative to the diameter, the flexibility of the body is ensured and the passage resistance at the curved pipe portion is small.Also, the rear big 3 has a resin replacement function ( In order to avoid this problem, resin introduction grooves 17 are formed on the left and right outer peripheral walls of the BIG, and the resin introduction grooves 17 are formed in the left and right outer peripheral walls of the VIG, and the resin introduction grooves 17 are opened in communication toward the front side in the direction of travel. ), in the body piece 33, replacement grooves 18 are formed on the -1- lower outer circumferential wall of the big. It is formed at one aper end 117a, +8a which is inclined diagonally in the direction c toward the rear fj, and the above-mentioned replacement groove 181.L is buried in the big so as to open in the rear direction of the rear pig 3. For example, it is connected to a passage 19 made of polyethylene pipe J-bu.
Insert the low viscosity resin C2 into the existing @1 of the repair section l- and move the joint sealing resin along the inside of the pipe.
During this movement process, a plurality of joints 13 are interposed within the section.
The permanent joint part 13 is shown in Figure 4, J:
9), for example, the artificial diameter section 13a installed at the tube end of one tube is connected to the tube end 13b of the other tube.
A seal 14, which is usually called [hemp JIIl], is stuffed into the abutting μ fitting part, and one part is filled with lead material 15.
It has a structure that is sealed with. As mentioned above, in the existing pipe 1 to be repaired, there is a VIG insertion conduit 5 at one separation end 11, and one at the other end! L end 12
Pig guiding pipes 6 are connected to the pipes 5 and 5, respectively. C+ is shown enlarged in FIGS. 2 and 3. The conduit 5 for inserting the VIG is already installed '1' as shown in Figure 2.
Between the separation ends 11 of 1 [1 part with clamp 51
1S2 are freely connected, and the pig insertion conduit 5 has a
A 1-1 part 5a for resin filling is provided, and a 1.1 opening/closing hole 52 is provided there.An exhaust port 5b is provided at a level lower than that. There is an opening/closing hook 53 on the left side of the opening/closing hole.The resin filling tank 7 connects the hose 7a to the resin filling opening 5a through the opening/closing hook 52. communicated through
The filling pressure to the tank 7 is given to the small compressor 7ch by driving the light lightning machine 7b. Further, as shown in FIG. 3, the pig outlet conduit G is provided with a discharge port 6a for discharging the residual resin, and a lever 01 is provided with an opening/closing hook 01. Further, above the discharge port 61, the conduit 6
In addition, an M8 with a guide reel 81 for leading out the towing cable 4 passing through the 3# pipe G is clamped to the open LJ end of the conduit 6. According to 82, r: Attachment/detachment [several words (]) are mentioned. The above-mentioned mount 8 has a configuration in which the lead-out part C of the tow cable 4 is divided in half. However, the tip of the -C tow cable 4 is Drum 9 of Wooinji 9
A is wound around the tow rope 4, and a pig 2 is attached to the winding rope J.
, 3 is inserted into -C, the existing answer 1 through the insertion conduit 5. During this insertion, first the front side big 2 is inserted, the resin 0 is put into the front side of A, and then the rear side A state in which the big 3 is inserted into the conduit 5 and the gap between the 1 side big 2 and the rear pig 3 corresponds to the resin filling part 5a. Filled with pressure. At this time, the opening/opening cock 53 is opened to let out the air in the gap for the first time, and the air is led out through the discharge port 51). In order to prevent the rear pig 3 from being pulled out from the artificial end of the conduit 5 due to the filling pressure of the resin, a pin 54 is detachably attached to the outer end of the tube 5. enough pig 2
With the gap between ゜ 3 and 3 inches filled with resin, the tow cable 4 is attached and the traction rope is 9 inches long! IJ'C is drawn. 'A:D,':I-kuck 52 is closed upon completion of resin filling 1i. By pulling the tow rope 4, the pigs 2 and 3 are pulled and C1-1<
However, the resin C in front of the pig 2 removes the dust inside the existing pipe 1 and the dust in the space of the pipe joint 13.
191 is deposited along the sticky line 11, and the action of removing C is covered. Effect of the Invention In this way, for the rear pigs 1, 1, and the rear pig 3, where the pigs 2, 3 are pulled by the tow rope 4, the area around the joint between the pig 3 and the tow rope 4 is located on the embedded disk 39. Therefore, a contraction action occurs between the embedded disc 39 and the supporting disc 36 at the tip thereof, and the close contact 1.1 to the inner wall of the existing pipe 1 is promoted. On the other hand, during traction, an elongation action occurs in the body part between the 1 & 39 circles 1 & 39 and the support disk 37 at the rear end, but due to the action of 738 and the bolts and nuts, the Since no elongation occurs, the contact with the inner wall of the existing pipe 1 is substantially maintained without any problem. When the rear pig 3 reaches the position of the pipe joint part 13 by pulling the pigs 2 and 3 (see Figure 9), the resin on the front side of the rear pig 3 is removed from the existing pipe 1 during the towing movement. Sufficient filling pressure is generated at the rear end of the C41 resin to overcome the viscous resistance between it and the inner wall, so this filling B causes the resin to flow into the joint space of the pipe joint 13 via the groove 17. , from the joint space of the pipe joint 13, air receives filling pressure (J) and is naturally pushed rearward via the groove 18. At this time, a negative force is applied to the rear space of the rear pig 3. Air may be suctioned and discharged from the pipe joint part 13 through the groove 18 by applying pressure.In the process of repairing the flat part of the pipe joint, when passing through the existing pipe 1, The rear pig 3 encountered strong resistance due to some obstacles, and the tow line 4
The connection between the and the embedded disc 39 may be broken. This lj1 joint, the rear side big 3 is supported at the connection point between the rear side support disk 37 and the tow rope 4, and is pulled out from the existing pipe 1. At this time, the pig 3 1iLlf on holiday
Even if the compressive force moves due to the frictional resistance with the inner surface of the pipe 1, the trunk piece 33, which is in danger of 111 clothing, will be able to maintain its surrounding sponge material 31 with the help of its core 1J3a. ] The compressive force is applied to the part that prevents the diameter from increasing, so it! A sudden increase in friction 1α to the inner surface of the conduit 1 is avoided. This J, please put the pig in the tow rope,
If the seat τ with the disc 39 is broken, some movement is secured and the pig 3 can be safely pulled out from the existing pipe 1. Repairs to the lower 3° pipe joint 13 have been completed. If so, clamp 82
(Remove the lid 8 and divide it into two parts, and
After listening to Kotsukuro 1, first remove the resin C on the front side of the front pig 2.
Then, the rear pig 3 is derived. 'E Ll, loosen 28a and 28b to the pole 1, release the pongee 1 (pongee 1) of the collar 28, untie the pig 2 and the tow line 4, free the pig 2, and tighten it further. When the tow rope 4 is pulled at 1 inch 9, the pig 2 does not move t!' and only the pig 3 climbs up the inside of the conduit 6. At this time, the residual resin (,
It is discharged to 71, for example to the container 41, by means of the undischarged pipe 6a. In this case, since the M8 is divided into 2" pieces as shown in the figure, the tow rope 4 wound around the woven wire does not interfere with the removal of the pigs 2 and 3. In this embodiment, Although the configuration of the present invention was applied to the rear replacement pig 3, it is of course possible to apply this configuration to a normal through-pig as long as it requires a relatively long pig 414 structure. [Effect of the invention] As described in detail above, the present invention removes the core in the center of the pig and uses a comparatively high quality rubber 't144 material. 6. If the fixed connection with the tow rope is broken, the smell within the existing color - (,
I between the inner wall! 7-1 Dormitory Resistance Big is 1! - Prevents the pig from shrinking and rapidly increasing frictional resistance, allows the pig to be safely carried out of the existing pipe, and prevents the pig from being unable to pull out the existing pipe in the event of a failure. There is an effect that can be done.

[Brief explanation of the drawing]

Figure 1 shows one embodiment of the present invention.
A schematic diagram, Fig. 2 is a schematic side view of the conduit for entering the replacement piston 11, and Fig. 3 is a schematic side view of the conduit for leading out the VIG.
ll! Schematic side view, FIG. 4 is a longitudinal side view showing the pig in a towed state, ff15 is a half-section side view of the front pig, FIG. 6 is a perspective view of the replacement rear pig, and FIG. Figures 7-1y-8 are a front view of the same, and Figure 9 is an enlarged view of the main part showing the state of resin filling. 1... Existing? To, month, 12...minute l1llll end, 1
3... Broom/joint part. 13a...Population IY part, 1 t')b...Tube end, 1
4... Seal (Δ, 15... Lead material, 17. [-
・+lIS strip, 17a, 18a --r- end wall,
19... Passage, 2... Pig, 21... 1111 pieces, 22... Finfish, 23... Head piece, 24.2! i...support disk,
20... Stud pol h, 27... Hole, 211.2
9...Color, 28a, 29a...Bolt, 2
8b, 29b...Brace (J seat, 3...Pig, 3a...Core 1Δ, 31)...Sponge material 1゛11.31...Head piece, 32...Body part Tip piece, 33... Body piece, 34... Rear body piece, 35
... Jishi l'i, 3G, 37... Support disk,
38... Soi λ no, 38a, 38b-... Pol (
・, 38c, 38d -...S・nt139...
Embedded disc, 39a... Oak i~, 4... Traction cable, 40... Supply pipe, 41... Container, 5... Pig insertion conduit, 5a... Resin filling 11.51 )...4 ノ+air bottom part, 51...clamp, 52.53...cock, 54...cross pin, 6...pig outlet conduit, 6a...ill outlet 1'' Part, Gb... Air pressure supply pipe, 61... Opening/closing cock, 7... Resin filling tank, 7a... Small space, 7b...
・Kodenki, 7C...Complete 1su, 8...Ai, 81...Guide reel, 82...Clamp, 9...Winch, 9a...Drum, 10...
・Completuri, 10a...I [Force operation Koninodo, Δ
, B... pit, C, D... resin.

Claims (1)

[Scope of Claims] A resin transporting pig for repairing existing pipes that slides airtight inside the pipe and moves the 4D resin placed on the front side while staying inside the pipe. It consists of a monthly amount of rubber 71, and is divided into multiple parts such as the tip body piece 9 and the body body J1. Connect the two in a cylindrical shape with an embedded plate interposed between them, and make the embedded plate hard against the tow rope passed through the center, and at least b This is a resin transporting pig for repairing pipe joints of membrane pipes.