JPS5989884A - Method and device for lining duct - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is intended for use in repairing or reinforcing pipes mainly buried underground, such as gas pipes, water pipes, power lines, communication lines, etc. The present invention relates to a method and apparatus for lining. Conventionally, as a method of lining the inner surface of this type of pipe, a cylindrical flexible lining material is inserted into the pipe while turning the inner and outer surfaces completely inside out using fluid pressure, and the turned lining material t is inserted into the pipe by the fluid pressure. A method of crimping and adhering to the road surface is known. This method can be used to construct long pipes in a trench where most of the pipe is buried underground by only digging out both ends of the pipe, and the pipe can be constructed with some force. It is a method that has been attracting particular attention in recent years as an extremely excellent method, which may be bent (it may be bent) and can be performed in a short time with extremely simple operations.

By the way, in the above method, the lining material 9 is bonded to the inner surface of the pipe with an adhesive, which does not contain volatile components and can be firmly bonded, and does not adhere to the inner surface of the pipe after lining. Reaction-curing adhesives are usually used to create a so-called vibe-in-vibe structure in which the tension members form separate rigid pipes.

However, in order to cure a reaction-curing adhesive, it is necessary to heat it. There are adhesives that cure at room temperature, but they take a long time to harden, and those with a short curing time may begin to harden during the lining work, making it impossible to work. Therefore, it is best to fully feed a heat medium such as hot water into the lining V material after inserting the lining material inside out to heat and harden the adhesive, but in order to fully feed the heat medium, When the fluid pressure inside the lining material is reduced, the lining material peels off from the inner surface of the pipe, and air gets trapped between them and freezes, so that even if the lining material is pressurized again, it is no longer able to adhere tightly to the pipe pipe. It becomes possible.

The present invention was made in view of the above circumstances, and it is possible to inject a heating medium into the lining material without completely reducing the fluid pressure after the lining material is turned inside out and inserted into the pipe. , provides a method and apparatus for completely curing the adhesive to complete the bonding process.

1 and 2 show an apparatus 1 according to the invention.

1 is a pressure vessel, and a side plate 8 is provided on one side of a body 2, and the other side is closed with a lid 4. Side plate 8 and lid 4
A reel 7 consisting of a shaft 5 and a 7-lunge 6.6 is rotatably supported, and one end of the shaft 5 is airtightly supported by the lid 4 and protrudes from the lid 4. )・Handle 8 is fixed. Further, the other end of the shaft 5 is airtightly supported by the side plate 3, and the shaft 5 is
A hollow 9 is formed at the center of the shaft at the end of the shaft, and a heat medium inlet pipe 11 is connected to the shaft through a rotary joint 10. A heat medium discharge port 12'z is provided in the center of the shaft 5 and communicates with the hollow space 9 from the outer periphery of the shaft 5, and a hose 14 is connected to the heat medium discharge port 12 through the entire elbow pipe 13. A hanging groove 15 is fitted around the outer periphery of the end of the hose 14 to prevent the hose 14 from being flattened by external force.

A peephole 17 into which an acrylic resin plate 16 is fitted is provided at the upper and rear portions of the body 2, and an acrylic resin penlight mounting member 18 is attached to the front end of the upper portion.
The inside of the pressure vessel 1 is illuminated with light from a penlight, and the inside can be seen through a peephole 17. Further, in the drawing, 19 is a pressure fluid inlet, which is connected to a pressure source (such as a pressure regulator) through a pressure regulator, and 2.
0 is a discharge port, which is opened through valve 1, and 21
9 is a gauge installation port where a pressure gauge is attached.

An annular protrusion 22 is provided on the front end surface of the body 2, and grooves 28 and 24 are formed on the inner periphery of the annular protrusion 22.
A gasket 25 is fitted in B, and a plurality of pawls 26 are fitted in the groove 24, and the pawls 26 are always biased by a spring 27 in the direction of protruding from the groove 24.

A cover plate 28 closes the opening 29 in the annular projection 22, and is airtightly fitted into the annular projection 22 by a packing 25 and prevented from being removed by a claw 26. 30 is an operation ring, and by pushing it into the metal annular projection 22, the pawl 26 is pushed into the groove 24 against the elasticity of the spring 27, and the cover plate 28 is pushed into the entire annular projection 22. It can be extracted from.

A nozzle 32 having a part 81' at its tip is protruded from the center lower part of the lid plate 28, one end of a corrugated pipe 33 is fitted to the outer periphery of the structure 81, and a retaining ring 84 and a tightening ring 3 are fitted.
5 and is fixed to the nozzle 32 by. 86 is a rotor attached to the other end of the corrugated pipe 33. A structure part 88 is provided at the rear end of the main body 37 of the cap 86, and the other end of the corrugated pipe 33 is fitted onto the outer periphery of the structure part 88, and is fixed by a retaining ring 39 and a tightening ring 40.

Reference numeral 41 denotes a fixed tube at the front of the 36, and a structure 42 is also formed at the rear of the tube, and the tip of a lining material 43 is held between the inner periphery of the main body 37 of the base 36 and a tightening ring. 44. There are 7 langes 45 at the front end of the fixed tube 41.
1-! is provided in the conduit 4-6. ! has been established.

Note that the device of the present invention is not limited to this embodiment. For example, the opening 29 in the pressure vessel 1
It is also possible to connect the nozzle 82 and the nozzle 86 with a rigid Wl pipe having a universal joint or the like. Matanozosamado 1
7 and the penlight mounting member 18 are not essential components.

The method for lining the conduit all around the device C will now be explained.

First, a flexible cylindrical lining material 48'fc having a length equal to or slightly longer than the length of the pipe 46 is prepared, and the inner surface of the lining material 43 is completely coated with adhesive. Next, this lining material 4
A thin hose 14' (5) with a length equal to the length of Heat medium outlet f-1471 is formed. Then τ, hose 1
A spring 15 is fully fitted to the outer periphery of the rear end of the hose 14, and an elbow pipe 13 is provided at the metal heat medium discharge port 12 at the rear end of the hose 14.
The reel 7 is rotated by the handle 8, the hose 14 is wound around the entire reel 7, and the lining material 4B'f is further wound thereon. Then, the entire tip of the lining material 43 is fixedly supported in an annular manner by the cap 86, and the cap 86 is further fixed to the conduit 46.

Next, when a pressure fluid (for example, compressed air) is fed from the pressure fluid inlet 19, the pressure of the fluid acts on the rear part of the annular fixed part of the lining material 43, and the lining material 43 is pushed inside the structure 42. A folded portion 48 is formed on the side. Then, the inner lining material 43 is folded back [7
Portion 48 advances within conduit 46. Therefore, the inner lining material 9 material 43
is pulled and reeled out sequentially while rotating the reel 7,
The folded portion 48 (Jl) is then sequentially turned over, and the adhesive is inserted into the conduit 46 by the fluid pressure.
is crimped onto the inner surface of the

FIG. 3 shows a state in which the lining material 43 is turned over over its entire length and is crimped over the entire length of the conduit 46. The hose 14, which was located at the tip of the rear end Fi conduit 46 of the lining material 43 and was connected thereto, is inserted into the inside out lining material 43. In this state, when a heat medium (for example, hot water) is completely fed into the hollow 9 of the shaft 5 from the heat medium inlet pipe 11 through the rotary joint 1O, this heat medium flows from the heat medium discharge port 12 through the entire elbow pipe 13 and into the hose. 14 through v1 heat medium outlet 4
7 into the lining material 48, the adhesive is completely heated from the inside of the lining material 43, and hardening is accelerated.

The heating medium, which has completely heated the adhesive and cooled itself, flows back inside the lining material 48 to the rear, returns to the pressure vessel l, and is discharged from the exhaust Fh port 20.

In this way, when the heat medium is completely passed through and the adhesive is sufficiently heated and cured, the supply of the heat medium is stopped, the heat medium is completely discharged, and the lining material 43 is cut off at both ends of the pipe line 46, as appropriate. If all the terminals are treated by the method described above, the lining work 9 of the pipe line 46 is completed.According to the present invention, the inner liner material 43 is turned over and inserted into the pipe line 46, and After the adhesive is crimped onto the inner surface of the conduit 46, a heating medium can be passed through the lining material 43 without reducing the fluid pressure inside the lining material 43 to heat the adhesive and fully accelerate curing. Therefore, the lining material 43 does not peel off from the pipe line 46, and the pipe line 46 can be correctly lined over the entire length thereof. In addition, the work of turning over the lining material and feeding and discharging the heat medium can all be done only on the rear end side of the pipe wI46, making the work easy and
It can be done in a short time without requiring any manpower.

In addition, in the device of the present invention, since the heating medium is fed into the hose 14 through the shaft 5 of 1 J, it is possible to immediately start feeding the heating medium immediately after the lining material 48 is turned over and installed. can. Moreover, since the hose 14 has a structure that prevents it from flattening due to external force near the connection part with the heat medium discharge port 13, the excess hose 14 is removed from the shaft when the lining V material 43 is turned over and installed, as shown in FIG. 5
The hose 14 is wound around the hose 14 and has a circular cross section, so there is no problem in feeding the heat medium. However, in this case, the reel 7 would need to be large to wrap the entire hose, so the reel 7 would need to be large enough to wrap around the hose 14 for several tens of meters near the connection part with the heat medium discharge port 12 at the rear end of the hose 14. Only a few ηl have the above-mentioned structure, and the other parts can be easily folded flat.
It is preferable that In addition, in order to prevent the hose 14 from flattening due to the total external force, the hose 14 must be
A hanging spring 15 may be fitted to the outer periphery of 4°14,
Alternatively, a hose with a structure that is basically resistant to collapse, such as an ordinary air hose or a corrugated hose, may be used. In this case, all hoses from several tens of holes to several meters that are hard to collapse are connected to the heat medium discharge port 12, and a hose joint that can be easily folded into a flat shape is connected to the tip of the hose, and a lining material 43 is connected to the tip of the hose. It is better to do so.

The length of the hose 14 can be accurately calculated from the length of the pipe line 46, but in general there will be some error due to the bending of the pipe line, the error in the length of the lining liner 48, etc. .

If the length of the lining V material 43 or the hose 14 is short, the lining material 4
When the end 1 of the conduit 46 is not crimped when the end 1 of the conduit 46 is turned over, it causes an extremely inconvenient sound, so the length has to be made with some margin, but the thickness is insufficient for this margin. The setting should be such that the portion of the hose 14 that does not flatten out is extended out from the shaft 5 to some extent when the lining material 48 is turned over.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the apparatus of the present invention, in which FIG. 1 is a longitudinal sectional view at the center and FIG. 2 is a sectional view at the center. FIG. 3 is a central longitudinal cross-sectional view conceptually showing the complete state in which the inner lining material has been turned inside out in the method of the present invention. 1...Pressure vessel, 5...Shaft, 7
...Reel, 9...Hollow, lO...
...Rotating joint, 12...Heat! Discharge port, 14
...Hose, 19 ... Pressure fluid inlet, 20 ... Discharge port, 36 ... Mouthpiece, 4
3... Lining 9 materials, 46... Conduit, 47
...Heating medium outlet, 48...Folded part. Patent applicant: Tokyo Gas Co., Ltd. Name: K +9 J -Kuruu

Claims (1)

[Claims] 1. At one end of the conduit, one end of a flexible lining material whose inner surface is fully coated with adhesive is fixedly supported in an annular shape, and the other end of the lining material is A hose of the same length as y is connected to the tension V material, and fluid pressure is applied to the rear part of the annular fixed part of the lining material, and the lining V is formed at the folded part formed there.
While turning the material over so that the inside is on the outside, the folded part is advanced inside the pipe, and the turned-over lining material is crimped onto the inner surface of the pipe via the adhesive metal, and the lining V material is stretched over its entire length. The hose is then turned over and crimped onto the inner surface of the pipe, and the hose is inserted into the turned-over lining material, and then a heating medium such as hot water is fed into the hose from the rear to line the hose from near the tip. A method for lining a pipe line, comprising: causing the adhesive to flow into the interior of the pipe, causing the adhesive to harden with the heat medium, and discharging the cooled heat medium from the rear end of the cooled heat medium lining material. 2. A pressure vessel having a pressurized fluid inlet, a discharge port, and a cap which is fixedly supported in an annular manner with a V-shaped inner lining, and has a pressure vessel portion inside which supports the reel so as to be freely rotatable, and one end of the shaft of the reel. is the inner wall, the tip of which protrudes outside the pressure vessel, and the entire heating medium inlet is formed by a rotary joint, while the central part of the shaft is provided with a heating medium outlet that communicates with the hollow space, and the heating medium outlet Hose? A device for lining a route, which is connected to the hose and is not flattened by an external force at least in the vicinity of the connection portion with the heat medium discharge port 1 of the hose.