JP3117922B2 - Inverter seal member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversing device used for a reversing lining method for an existing pipe such as a gas pipe for maintenance.

[0002]

2. Description of the Related Art Various techniques have been developed and proposed for a technique for rehabilitating and repairing existing pipes without digging while laying the existing pipes. For example, there is known a lining method in which a flexible tube is drawn into a tube and attached to the inner surface of the tube. At present, this method has already been put to practical use as an effective repair technique for aging existing pipelines.

[0003] As one of the lining methods, an inverted lining method is also applied. In the inverted lining lining method, a flexible lining tube having an outer diameter substantially equal to the inner diameter of the pipe and in which an adhesive is sealed is introduced into the existing pipe while inverting the inner surface to the outer surface. The lining tube is reverse-adhered to the inner surface of the existing pipe with an adhesive.

[0004] Specifically, first, an adhesive is sealed in a flexible lining tube in advance, and one end of the lining tube is folded back and fixed in an annular shape at one end opening of an existing pipe. Then, a fluid pressure is applied to the formed folded portion so as to press from the rear portion to the other end of the conduit, and the lining tube is inverted and introduced into the tube so that the inner surface becomes the outer surface. In this manner, the folded portion is gradually advanced from one end to the other end of the pipe along the inside of the pipe, and the lined tube is pressed against the inner surface of the pipe by the fluid pressure and the adhesive over the entire length of the existing pipe.

[0005] As another reversing lining method, one end of a lining tube is folded back and fixed in an annular shape at an opening of one end of an existing pipe, and then a suction pump is connected to the other end of the piping to connect the suction pump to the inside of the piping. The tube is turned upside down by generating a negative pressure, and the lining tube is pressed against the inner surface of the tube with the adhesive over the entire length of the existing pipe. Finally, by circulating a heating fluid (liquid) in the inverted lining tube to promote curing of the adhesive, the lining tube is securely bonded to the inner surface of the existing pipe.

[0006]

However, the above-mentioned conventional method has the following problems.

That is, the pressurized reversing lining method requires a large and heavy reversing device. The lining tube after sealing the adhesive is wound flat on a reel and housed in a reversing device, and the reversing device has a communication connection tube that is connected to one end of a pipe to be installed. The lining tube housed in the inverter is inverted and introduced into the pipeline through the communication tube by fluid pressure.

[0008] Since such an inverter is large and heavy, it is inconvenient to carry it to a rehabilitation repair site of a pipeline. Also, when working in the field, such inverters often have a large volume and therefore often cannot be arranged due to lack of space.

In addition, in the case of the suction type reversing lining method, when a pipe to be installed has a corroded hole, there is a problem that air flows in from the corroded hole and the tube is crushed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In a suction lining reversal lining method combined with pressurization, a small-sized and easy-to-handle suction lining can be properly applied to a lining tube. It is an object of the present invention to provide a seal member of a reversing device for a lining that can perform an operation.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a reversing device for folding a flexible lining tube into an existing pipe from one end opening thereof and introducing the tube while reversing the tube. a is, the inverted device, furan <br/> a peripheral position that is disposed in front of the apparatus have a function of fixing the device to one end opening of the existing pipe line, joined to the body portion of the airtight member a cylindrical tube-shaped fixed member provided with the di-section, in the middle of the device,
It is arranged so that the fixing member is inserted into the end position to be joined with the body portion of the airtight member, the folded tube
A ring member and a wall for sandwiching the distal end, and
A reversing member having a cover member fixed to the portion, a pressurized fluid introduction port for applying the pressurized fluid to the tube, and a flange portion of the fixing member, which is disposed so as to fit the reversing member at a subsequent stage of the device. And a hermetic member which is introduced into the apparatus while sealing the tube fed from the rear with two front and rear seal members. Each member can be disassembled and assembled. The members are
A cutout is formed so that the lining tube can be inserted, and at least the tube insertion portion is formed of a soft elastic body.

Further, the seal member is formed of a soft elastic body having a notch at a substantially central portion of a columnar hard elastic member,
The lining tube is formed so as to pass through a notch in the soft elastic body portion.

Further, the hard elastic body is a hard rubber, and the soft elastic body is a sponge having a notch.

[0014]

According to the present invention constructed as described above, the lining tube is inverted and fixed in the device by the reversing member when the lining reversing lining is performed, and the device is fixed by the fixing member to open the one end opening of the pipeline. Can be installed properly. Also, when the pressurized fluid is introduced by the airtight member, the lining tube smoothly penetrates the soft elastic body (sponge) portion of the seal member, and the hard elastic body (hard rubber) lines the pressurized fluid without leaking to the outside. Can act on tubes.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded view of a reversing device according to the present invention.
FIG. 2 is an assembly drawing. As shown in the drawing, a reversing device 1 of the present invention includes a fixing member 2 disposed at a front stage of the device, a reversing member 3 disposed at a middle stage of the device, and an airtight member disposed at a rear stage of the device. It is composed of

The fixing member 2 is made of a plastic material, such as polyethylene or Teflon ( registered trademark ), which has a certain degree of strength and does not easily adhere to a resin.
Alternatively, it is made of another material having the same properties. The fixing member 2 has a cylindrical shape having a flange portion 21 on the outer peripheral surface, and a step is provided on the inner peripheral surface so as to have inner diameters d1 and d2. In addition, a plurality of through holes 23 are formed in the wall portion 22, and these through holes 23 allow the liquid fluid that has entered the fiber layer of the lining tube described later to be discharged from the fiber layer to the outside. . Further, a ring-shaped sealing material 25 is provided on the inner surface of the wall portion 24,
A plurality of screw holes 26 are formed through the wall 24.

The reversing member 3 comprises a main body 31 and a cover member 32. The main body 31 is made of a metal material having a required strength, for example, brass. The main body 31 has a relatively thin wall portion 33 and a relatively thick wall portion 34.
And the inner peripheral surface is tapered. The wall portion 33 can be mounted inside one end of the fixing device 2. In addition, the screw portion 3 is provided on the outer peripheral surface of the wall portion 34.
4a are formed. The ring member 35 is made of an elastic plastic material, and has a tapered wall. The size of the ring member 35 is
The tapered outer peripheral surface can be substantially engaged with the tapered inner peripheral surface of the main body 31. Further, the cover member 32 is made of the same brass material as the main body 31. The cover member 32 has an opening 36,
A screw portion 32a is formed on the inner peripheral surface. Body 31
The cover member 32 can be screwed to the main body 31 by the screw portion 34a formed on the outer peripheral surface of the cover member 32 and the screw portion 32a formed on the inner peripheral surface of the cover member 32.

The airtight member 4 has a substantially cylindrical body 41.
, A first seal member 42, a cylindrical connecting portion 43, and a cap 45 having a second seal member 44. The body part 41 has an inner diameter of the cover member 3.
The outer diameter of the reversing member 3 is slightly larger than the outer diameter of the turning member 2. Then, the flange portion 46 is integrally formed by contacting the flange portion 21 of the fixing device 2. The body 41 has a gas inlet 47, a liquid inlet 48, and a pressure detecting port (not shown) on its circumference.
The first seal member 42 is fitted into the rear end opening. Further, a connecting portion 43 can be screwed and connected to a rear portion of the body portion 41, and a cap 45 provided with a second seal member 44 can be screwed and connected to a rear portion of the connecting portion 43. .

Further, the first seal member 42 is provided as shown in FIG.
As shown in (a), (b), and (c), it is formed in a cylindrical shape, the periphery is made of a hard rubber 42a, and the center part is made of a sponge material 42b. Further, a notch 42c is provided in the radial direction to allow the tube L to pass through the seal member 42. Further, as shown in the cross-sectional view of FIG. 2B, the sponge material 42b is formed in a V-shape or an X-shape so as to reduce the insertion resistance of the tube L. With such a configuration, the tube L smoothly penetrates the seal member 42 and performs a proper sealing action.

Next, the assembled state of the reversing device 1 of the present invention will be described with reference to FIG. First, the fixing device 2 is mounted on one end of the pipeline P to be constructed. At this time, the open end face of the pipe P contacts the step 27 in the fixing device 2.

Next, the ring member 35 is mounted on the inverted lining tube L. In detail, the ring member 35 is oriented in the direction shown in FIG.
5 (almost the same as the width of 5). Then, a claw of a ring setter (not shown) is inserted into the inside of the tip of the reversing tube L, the tip of the tube L is opened, and the tube corresponding to the required length is folded back and put on the outer surface of the ring member 35. Then, the ring member 35 is attached to the main body 31.
Install inside. At this time, due to the elasticity of the ring member 35, one end of the lining tube L is folded and
1 to be fixed in an annular shape. Then, by screwing the cover member 32 to the main body 31, one end of the inverted lining tube L and the ring member 35 are stopped so as not to fall outside.

Finally, the airtight member 4 is connected to the fixing member 2. At the time of connection, the tube L is inserted through the sponge portion 42 b of the first seal member 42 and further inserted through the second seal member 44, and the cap 45 is screwed and connected to the rear portion of the connection portion 43. Then, the flange portion 21 of the fixing member 2
And the flange portion 46 of the airtight member 4 are connected to each other.

Next, the usage of the reversing device 1 of the present invention is shown in FIG.
This will be described with reference to FIG. First, the liquid shielding pig 6 and the resin A are introduced into the pipeline 5 from one end opening 51 of the construction target pipe 5 buried underground. Next, the reversing device 1 of the present invention is attached to the one end opening 51 of the conduit 5, and the small pressure pump 7 is connected to the gas inlet 47 of the reversing device 1. Further, the suction pump 9 is connected to the other end opening 52 of the pipe 5 with the resin recovery tank 8 interposed therebetween.

Then, the suction pump 9 is operated, and the pressurizing pump 7 is additionally operated, so that the liquid shielding pig 6 and the resin A are moved from the one end opening 51 to the other end opening 52 of the pipe 5. While being conveyed, the lining tube L is reversely adhered to the inside of the pipeline 5. At this time, the tube L is smoothly passed through the sponge member 42b of the first seal member 42 by the pressurized fluid of the pressurizing pump 7, and is securely sealed by the first seal member 42. 1. Appropriately acts on the lining tube L without flowing out. Further, even when the material that penetrates the first seal member 42 changes from the lining tube L to the insertion string immediately before the end of the lining lining, the sponge material 42b is soft and elastically deforms following the inserted object. No pressure fluid flows out.

In the present embodiment, the present invention is applied to only the first seal member 42 of the first seal member 42 and the second seal member 44, but the second seal member 44 is also the first seal member 42. The configuration may be the same as described above.

[0026]

By using the sealing member of the reversing device of the present invention configured as described above, the lining tube is reversed and fixed in the device by the ring member of the reversing member when the lining reversing lining is performed. In addition, the device can be appropriately mounted on the one end opening of the pipeline by the fixing member and the airtight member. Also, when the pressurized fluid is introduced by the airtight member, the lining tube smoothly inserts the cutout portion of the soft elastic body (sponge) of the seal member, and leaks the pressurized fluid to the outside by the hard elastic body (hard rubber). Can be applied to the lining tube without the need.

[Brief description of the drawings]

FIG. 1 is an exploded view of a reversing device.

FIG. 2A is a perspective view of a seal member. (B) It is sectional drawing of a sealing member. (C) It is a top view of a sealing member.

FIG. 3 is an assembly view of the reversing device.

FIG. 4 is a diagram illustrating the use of a reversing device.

DESCRIPTION OF REFERENCE NUMERALS 1 reversing device 2 fixing member 21 flange portion 22 wall portion 23 through hole 24 wall portion 25 sealing material 26 screw hole 3 reversing member 31 main body 32 cover member 32a screw portion 33 wall portion 34 wall portion 34a screw portion 35 Ring member 36 Opening 4 Airtight member 41 Body 42 First seal member 42a Hard rubber 42b Sponge material 42c Notch 43 Connecting portion 44 Second seal member 45 Cap 5 Existing pipeline 51 One end opening 52 Other end opening 6 Liquid shielding Pig 7 Pressure pump 8 Resin recovery tank 9 Suction pump L Inverted lining tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-38757 (JP, A) JP-A 56-3620 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 63/00-63/48 F16L 1/00 F16L 55/16 F16L 58/10

Claims (3)

(57) [Claims] 1. A reversing device for introducing a flexible lining tube into a pipeline by turning it over from one end opening of the existing pipeline while introducing the flexible lining tube, wherein the reversing device is disposed at a front stage of the device. It has a function of fixing the device to one end opening of the existing pipe line Te, the body of the airtight member
A cylindrical tubular fixing member provided with a flange portion at an outer peripheral position to be joined with the portion, and the fixing member is joined to the body portion of the airtight member in the middle of the device.
To is arranged to be inserted into the end position, the ring member and the wall portion for clamping the leading end portion folded tube
And a reversing member having a cover member for fixing the wall portion to the body portion, and a reversing member is disposed in a rear stage of the device so as to fit the reversing member,
It has a pressurized fluid introduction port for applying pressurized fluid to the tube and a flange portion joined to the flange portion of the fixed member,
And a hermetic member which is introduced into the apparatus while sealing the tube fed from the rear with two front and rear seal members. Each member can be disassembled and assembled, and the above-mentioned seal member can be inserted through the above-mentioned lining tube. A notch is formed as described above, and at least the tube insertion portion is formed of a soft elastic body. 2. The sealing member according to claim 1, wherein a substantially central portion of the columnar hard elastic member is formed of a soft elastic body having a notch, and a liner tube is inserted into the notch of the soft elastic body. The sealing member for a reversing device according to claim 1, wherein 3. The sealing member according to claim 1, wherein the hard elastic body is hard rubber, and the soft elastic body is a sponge having a notch .