JPH03223596A - Leakage preventive device for tube - Google Patents

Abstract

PURPOSE:To prevent a leakage phenomenon securely by covering a leaking position together with a tube or a tube connection with an adequate shell, composing the contact part of the shell and the tube to allow to contact closely, and filling a sealing material such as a coating material into the inside of the shell when necessary. CONSTITUTION:Positioning a tube connection part which consists of a mechanical joint generating a leaking phenomenon, at the center, a packing 20 is held on the gland surfaces of flanges 8, the tube 2 and the tube connection part is covered with capped semicircular tube bodies 7 and 7, fastening the upper and lower opposing flanges 8 with bolts and nuts 21 through the bolt holes to fix an outer shell 10. After that, a seal rubber 12 is installed between a seal case ring 11 and the tube 2, a nut 14 is fixed to a bolt 15 to press a ring 13 after loading the ring 13 further on the rubber 12, and the installing work is completed. In order to prevent the leaking phenomenon more securely, a hardening type sealing material is filled from an inlet pipe 18 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to the prevention of leakage phenomena in pipes of piping systems used for the purpose of moving fluids such as gases and liquids, and in pipe connections that connect the pipes. This invention relates to a leak prevention device for pipes that is used for repairing areas where leakage is occurring, or for repairing areas where leakage is likely to occur when the internal fluid pressure is increased even if there is no current leakage.

(Prior art) Conventionally, in piping systems used for the purpose of moving fluids such as gases and liquids, when a leak occurs in the pipe itself, the leakage area is caulked or an appropriate member is placed in contact with it. If a leak occurs at the joint between pipes, tighten it with a band to prevent leakage, and in the case of a joint between a pipe and a flange, fix the leakage point or the vicinity of the leakage point. In the case of joints between flanges, the strength of the flange bolts is increased, and when various mechanical joints are used, leakage prevention devices are used to prevent leakage. .

In addition, repairs to areas where there is a risk of leakage due to an increase in the pressure of the fluid inside the pipe are considered on a case-by-case basis.

(Problem to be solved by the invention) In the case of leak prevention using caulking as described above, the caulking itself requires advanced technology and is extremely difficult to implement.Furthermore, it is easy when the leakage is small, but when the leakage amount is large. The disadvantage is that it is difficult to prevent leakage.

Furthermore, when a suitable member is brought into contact with the leakage point and tightened with a band, it is extremely difficult to reliably prevent leakage for a long period of time.

Furthermore, when tightening the flange to increase the strength, there is a drawback that the effect is lost if the performance of the backing held between the flange deteriorates.

Furthermore, when mechanical joints are used, a leakage prevention device suitable for each joint is required, which inevitably leads to high costs.

Furthermore, in the case of reinforcing parts where there is a risk of leakage due to an increase in internal pressure, each case has to be considered uniquely, and as with mechanical joints, this has the disadvantage of being expensive.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems in the prior art. The above-mentioned problems can be solved by providing a pipe leakage prevention device in which the contact portion between the outer shell and the pipe can be brought into close contact with each other, and a sealing material such as caulking material is filled inside the outer shell as necessary. It aims to solve the problem.

The present invention has two lids with a through hole in the center having a diameter slightly larger than the outer diameter of the tube to be repaired, and a half-cylindrical body with lids that is divided into two by a plane passing through the axis in the length direction. It consists of an outer shell having a volume capable of enclosing a limb pipe or a pipe connecting part, with flanges provided at each cut end of the body, and equipped with a sealing device around the internal passage hole to press the pipe into contact with the pipe, This leakage prevention device for a pipe is characterized in that an internal gap between the pipe or the pipe connecting portion is filled with a curable sealing material as required.

In addition, the present invention provides a cylindrical portion having a required length and an inner diameter slightly larger than the outer diameter of the pipe to be repaired, and then cutting the body portion and the cylindrical portion at appropriate points in the length direction. A cylindrical outer shell having a volume capable of accommodating a limb or a tube connection is equipped with a sealing device that brings the tube into pressure contact with the outer periphery of the cylindrical portion, and the tube or tube connection is This leakage prevention device for pipes is characterized in that a curable sealing material is filled in the gap between the pipes and the outer periphery thereof is covered with a reinforcing material to form a reinforcing layer.

In addition, the present invention provides a through hole having a diameter larger than the outer diameter of the tube to be repaired in both opposing walls on the same axis, and at each cut end of the two-handed sphere divided into two by a plane passing through the axis. It consists of a spherical outer shell provided with a flange and having a volume capable of enclosing a limb pipe or pipe connection part, and the end of the through hole is equipped with a sealing device that presses against the pipe, and if necessary, the pipe or pipe connection part is This is a leakage prevention device for pipes characterized in that an internal gap between the connecting portion and the connecting portion is filled with a curable sealant.

(Function) The leak prevention device for pipes encloses the pipe or pipe connection part in a sealable outer container, and if necessary, fills the inside with a sealing material and solidifies it, so the leakage point is sealed and the leakage phenomenon is prevented. can be reliably prevented.

Furthermore, since the pipe leakage prevention device is equipped with an outer shell and a sealing device by tightening bolts, it is extremely easy to install compared to conventional leakage prevention methods.

In addition, leakage prevention devices for pipes can be used for pipe connections such as the pipe itself, flanges of different sizes and attachment methods, and various mechanical joints, so it is extremely versatile in terms of usage, so the amount of use can be reduced. It also increases and can be manufactured at low cost.

〔Example〕

The present invention will be described in detail below based on a first embodiment shown in FIGS. 1 to 4. 1 is made of a material such as steel and has a through hole 3 drilled in the center with a diameter equal to or slightly larger than the outer diameter of the pipe 2 to be repaired. Contains a pipe connecting part 9 consisting of a pipe 2 or a mechanical joint, with a U-shaped flange 8 provided at each cut end of a double-covered semi-cylindrical body 7.7 divided into two along the plane passing through the core. It is formed with a cylindrical outer shell 10 made of a material such as steel and has a large volume, and is further provided with two lids 4° around the internal through hole 5.3, along with a half-cylindrical body 7.7 with both lids. 5, a seal rubber 12 fitted between the seal case ring 11 and the pipe 2, a seal rubber 12 fitted between the seal case ring 11 and the pipe 2, and a seal rubber 12 fitted between the seal case ring 11 and the pipe 2. A sealing device consisting of a ring 13 placed on the seal rubber 12, and a tightening bolt 15 whose bottom part is fixed to the side covers 4 and 5, passes through the seal rubber 12 and the ring 13, and has a nut 14 screwed onto its tip. 16 (by tightening the nut 14, the ring 13
The sealing rubber 12 is pressed against the side covers 4, 5 and the pipe 2 to seal the gap 17 between the side covers 4, 5 and the pipe 2), and the necessary This is a leakage prevention device for a pipe that solidifies the inside by filling the gap between the connecting part 9 and the outer shell 10 with a sealing material such as a hardening type caulking material using an injection pipe 18 or the like. As shown in FIG. 3, the backing 20 is held in the bolt hole, and the upper and lower opposed flanges 8 are tightened with bolts and nuts 21 to assemble both covered cylindrical bodies 7, 7 to the outer shell 10. Also, the bolts 15 are inserted through the bolt holes 22. This is a bolt hole drilled in the hook 13.

The method of using this pipe leakage prevention device 1 will be described in detail below. First, the nut 14 of the sealing device 16 is removed from the bolt 15, the ring 13 and the seal rubber 13 are removed, and the outer shell 10 is separated into the semi-cylindrical body 1.1 with both lids, and then the mechanical joint where the leakage phenomenon occurs is removed. The backing 20 is held on the ground surface of the flange 8 so that the pipe connecting portion 9 consisting of the pipe connecting portion 9 is located approximately in the middle, and the semi-cylindrical body 7 with both lids is attached.
7 wraps the pipe 2 and the pipe connection part 9, and the outer shell 10 is fixed by tightening the upper and lower opposing flanges 8 with bolts and nuts 21 through each bolt hole 19.

Next, after fitting the seal rubber 12 between the seal case ring 11 and the pipe 2, and placing the ring 13 on top of it, the nut 14 is screwed onto the bolt 15 to close the ring 1.
Press 3 to complete the installation.

In order to more reliably prevent leakage phenomena, the injection pipe 18
It is best to inject and solidify a hardening type sealing material.

In this case, the leakage prevention device 1 encloses the tube connection portion 9 where the leakage phenomenon has occurred together with the tube 2 in the outer shell 10, and maintains it in a completely sealed state by the backing 20 of the flange 8 and the sealing device 16. In order to solidify the internal void with a sealing material,
A leakage phenomenon occurring in the pipe 2 and the pipe connection part 9 can be reliably prevented.

In addition, since the leak prevention device 1 can attach the outer shell 10 and the sealing device 16 by tightening bolts to the location where a leak phenomenon occurs, it does not require more advanced technology than conventional caulking. It is extremely easy to install.

In addition, the pipe leak prevention device 1 can be used for the pipe 2 itself, and for pipe connections 9 such as flanges of different sizes and attachment methods, and various mechanical joints, and furthermore, it can be used to prevent leakage from occurring due to an increase in the internal pressure of the fluid. It is extremely versatile as it can also be used to repair areas where there are concerns about
Since the amount used increases, it can be manufactured at a low cost.

In the first embodiment described above, the outer shell 10 was formed into a cylindrical shape from steel, but instead of steel, it may be formed from a synthetic resin such as FILP, which has the same mechanical strength, and is secured by the backing 20. If it can be fixed in a sealed state with the flange 8, it may be formed into an elliptical or rectangular cross section instead of a cylinder.

The sealing device 16 used was of the type shown in FIG. 4, but instead, as shown in FIG. An O-ring 23 that comes into contact with the end of a certain through hole 3, a presser ring 25 that has a notch 24 on its inner circumference that makes contact with the O-ring 23, and a presser ring 25 whose bottom part is fixed to the side lids 4 and 5. Insert the tip
A sealing device 26 consisting of a tightening bolt 15' having a ζ nut 14' screwed therein may also be used. The function of this sealing device 26 is similar to that of the sealing device 16. Also, instead of these two sealing devices 16.26, an annular backing simply fitted into the through hole 3 of the both lids 4.5 may be used, in which case both upper and lower opposing flanges 8 .8 is pressed against the outer wall of the tube 2 and bites into the end of the through hole 3.

Further, although a hardening type caulking material is used as a sealing material, an appropriate synthetic resin having equivalent properties may be used instead.

Further, although a case is shown in which a mechanical joint is used for the pipe connecting portion 9, the same effect can be applied when other types of mechanical joints or flanges are used instead of this mechanical joint.

The present invention will be described in detail below based on a second embodiment shown in FIGS. 6 and 7. 27 is a cylindrical portion 29 having a required length and having a through hole 28 having a diameter that is the same as or slightly larger than the outer diameter of the pipe 2 to be repaired.
were provided at both ends, and the body portion 30 and both cylindrical portions 29.29 were cut at appropriate locations in the length direction to make them expandable, and end portions 29' and 30' that could be overlapped were formed at the cut locations. , tube 2
Alternatively, a cylindrical outer shell 31 made of either natural or synthetic rubber with a required thickness and having a volume that can contain the pipe connecting part 9 made of a mechanical joint is filled with a hardening type caulking material in the gap of the pipe 2 or the pipe connecting part 9. A reinforcing layer 33 of a required thickness is formed by filling the outer periphery of the sealing material 32 with a reinforcing cord made of suitable chemical fibers. This is a leakage prevention device for pipes equipped with a sealing device 34 made of a punch band or the like that is pressed into contact with the tube.

The method of using this pipe leakage prevention device 27 will be described in detail below. First, a base was built around the pipe connection part 9 consisting of a mechanical joint where a leakage phenomenon had occurred by solidifying a sealing material 32 such as a hardening type caulking material using another suitable formwork. Afterwards, the outer shell 31 is expanded to contain the base, and the outer shell 31 and the ends 31' and 29' of the cylindrical part 29 are expanded.
Glue and fix with adhesive.

Next, a reinforcing cord made of a suitable chemical fiber is radially wound around the outer periphery of the outer shell 31 including both cylindrical parts 29.29 to form a reinforcing layer 33 of a required thickness. A sealing device 34 made of a punch band or the like is attached to the outer periphery of the pipe to complete the installation of the pipe leakage prevention device 27.

The effect of the leakage prevention device 27 is the same as that of the leakage prevention bag @1 in the first embodiment.

In the second embodiment described above, the outer shell 31 is made of either natural or synthetic rubber, but it may be made of synthetic resin having equivalent properties instead.

In addition, a reinforcing layer 33 was formed around the outer circumference of the outer shell 31 by radially winding a reinforcing cord made of a suitable chemical fiber, but when the fluid pressure inside the tube 2 is low, this reinforcing layer 33 is removed and the outer i.
Tape the appropriate places on 31.

The tightening may be fixed with a string or the like.

Further, although a hardening type caulking material is used for the sealing material 32, a synthetic resin having the same characteristics may be used instead.

In addition, a leak prevention device 2 is installed at the pipe connection section 9 where the leakage phenomenon occurs.
1, the outer shell 31 was attached after forming a base made of the sealing material 32 on the pipe connecting portion 9 in advance. After the outer shell 31 is attached to the tube connecting portion 9, the inside may be filled with the sealing material 32.

The present invention will be described in detail below based on the third embodiment shown in FIGS. 8 and 9. 35 has a through hole 36 larger than the outer diameter of the pipe 2 to be repaired on both walls facing each other on the same axis, and a seal case ring 38 having a cross-sectional shape having a bottom 37 inside at the end of the through hole 36. A tube 2 or a tube having a semicircular flange 40 at each cut end of both hemispheres 39 and 39 which are fixedly fixed and divided into two together with the through hole 36 and the seal case ring 38 along a plane passing through the axis. A seal case ring 38 is made of a spherical outer shell 41 made of a material such as steel and has a volume that can accommodate the connecting portion 9, and is fixed to the end of the through hole 36.
, a seal rubber 42 fitted between the seal case ring 38 and the tube 2, and a ring 43 fitted between the seal case ring 38 and the tube 2 and placed on the seal rubber 42, sealing the bottom. It is fixed to the bottom 37i of the case ring 38 and passes through the seal rubber 42 and the ring 43, and the nut 14 is attached to the tip thereof.
A sealing device 4 consisting of a tightening pole l-15" screwed onto the
4 (by tightening the nut 14'', the seal rubber 42 pressed through the ring 43 is pressed against the seal case ring 38
The bottom part 37 of the pipe 2 is pressed against the pipe 2 to seal the gap between the bottom part 31 and the pipe 2). This is a leakage prevention device for pipes filled with the same sealing material 32 as in the embodiment. 45 is a bolt hole provided in the flange 40, and the backing 46 shown in FIG.
Both hemispheres 39 and 39 are assembled into the outer shell 41 by tightening the upper and lower opposing flanges 40. Also, 48 is bolt 1
A bolt hole drilled in the ring 43 into which the 5″ is inserted, 4
Reference numeral 9 denotes an injection port for filling the sealing material 32, and this government leakage prevention device @35 can be used in the same manner as the leakage prevention device 1 in the first embodiment. Further, the operation and effect are the same as those of the first and second embodiments.

In the third embodiment described above, the outer shell 41 is made of steel and formed into a spherical shape, but instead of the steel material, it is made of a synthetic resin having the same properties, and instead of the spherical shape, it is formed into an elliptical shape. It's okay.

Further, the sealing device 44 was formed by directly fixing the seal case ring 38 to the end of the through hole 36.
A flange protruding to the outside is fixed to the end of the sealing device 16 in the first embodiment, and instead of the side plate 4.5 in FIG. May be equipped with.

(Effect of the invention) Since the present invention has the above configuration, it has the following effects.

(1) The pipe or pipe connection part is enclosed in a sealable outer shell, and if necessary, a sealing material is filled inside and solidified, so the leakage point is sealed and the leakage phenomenon is reliably prevented. Its functionality is extremely excellent.

(2) Compared to conventional leakage prevention methods, the device is extremely simple, so the number of repair man-hours can be significantly reduced.

(3) Since it has extremely high versatility in terms of usage, the amount of use can also be increased, making it possible to manufacture it at a low cost, contributing to an increase in corporate profits.

[Brief explanation of drawings]

The drawings show each embodiment of the present invention, and FIGS.
Example, Figures 6 and 7 are the second embodiment, Figures 8 and 9 are the third embodiment, Figure 1 is the front view, Figure 2 is the side view, and Figure 3 is the A. -A sectional view, Fig. 4 is a sectional view of the main part of the sealing device with a part cut away, Fig. 5 is a sectional view of the main part of another sealing device with a part cut away, Fig. 6 is a side view, and Fig. 7 is a sectional view of the main part of the sealing device. B-
B sectional view, FIG. 8 is a side view, and FIG. 9 is an E-0 sectional view. 1.27.35... Pipe leakage prevention device 2... Pipe
3,28.36...Through hole, 5...Side cover 6.30...Body part...Semi-cylindrical body with lid 8
, 4o...Flange...Pipe connection part 10.3
1.41...Outer shell 1.38...Seal case ring 2.42...Seal rubber 3.25.43...Ring 4.14.14"...Nut 5.16.15...・Bolts 6.26, 34.44... Sealing device 0.46... Backing 3... O-ring 24... Notch 9... Cylindrical part 32... Sealing material 3... Reinforcement layer 3
7... Bottom 9... Hemisphere

Claims (1)

[Scope of Claims] 1) Both lids have a through hole in the center with a diameter slightly larger than the outer diameter of the tube to be repaired, and both lids are divided into two by a plane passing through the axis in the length direction. It consists of an outer shell having a volume capable of enclosing the pipe or the pipe connecting part, with a flange provided at each cut end of the half-cut cylindrical body with a lid, and a sealing device for press-contacting the pipe to the periphery of both the through holes. A leakage prevention device for a pipe, characterized in that the internal gap between the pipe or the pipe connection part is filled with a hardening type sealing material as required. 2) A seal case ring that can be divided into two and is fixed to the side cover around the through hole, a seal rubber fitted into the gap between the seal case ring and the tube, a ring placed on the surface of the seal rubber, and a bottom part. A sealing device for a pipe according to claim 1, further comprising a tightening bolt which is fixed to a side cover, passes through the seal rubber and a ring, and has a nut screwed onto its tip. Leak prevention device. 3) An O-ring that is fitted into the pipe and abuts against the end of the through hole, a retainer ring that abuts the O-ring through a notch provided on the inner circumferential side of the lower end, and an O-ring whose bottom part is fixed to the lid and the 2. The leakage prevention device for a pipe according to claim 1, further comprising a sealing device comprising a tightening bolt which is inserted through a retaining ring and has a nut screwed onto its tip. 4) The leakage prevention device for a pipe according to any one of claims 1 to 3, characterized in that it has an outer shell made of either steel or synthetic resin. 5) Provide a cylindrical part of the required length with an inner diameter slightly larger than the outer diameter of the pipe to be repaired at both ends, and cut the body part and the cylindrical part at appropriate points in the length direction to make it expandable. , a cylindrical outer shell having a volume capable of enclosing the pipe or pipe connection part is equipped with a sealing device that presses the pipe against the outer periphery of the cylindrical part, and a hardening type seal is provided in the gap of the pipe or pipe connection part. A leakage prevention device for a pipe, characterized in that the pipe is filled with a reinforcing material and, if necessary, the outer periphery thereof is covered with a reinforcing material to form a reinforcing layer. 6) The leakage prevention device for a pipe according to claim 5, further comprising a cylindrical outer shell made of synthetic rubber having a required thickness. 7) The leakage prevention device for a pipe according to claim 5 or 6, further comprising a reinforcing layer formed of a reinforcing cord made of radially wound chemical fiber. 8) A through hole with a diameter larger than the outer diameter of the pipe to be repaired is provided in both opposing walls on the same axis, and a flange is attached to each cut end of both hemispheres divided into two by a plane passing through the axis. a spherical outer shell having a volume capable of enclosing the tube or tube connection, and equipped with a sealing device at the end of the through hole to press the tube into contact with the tube, as necessary. A leakage prevention device for pipes, characterized in that an internal gap between the pipe and the pipe is filled with a curable sealing material. 9) A seal case ring with an L-shaped cross section that can be divided into two, fixed to the end of the through hole, a seal rubber fitted into the gap between the seal case ring and the pipe, and a ring placed on the surface of the seal rubber. Claim 8: A sealing device comprising a tightening bolt whose bottom part is fixed to the seal case ring, passes through the seal rubber and the ring, and has a nut screwed onto its tip. Leakage prevention device for pipes as described in .