JP2008190647A - Pipe leakage prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recyclable pipe leakage prevention device capable of easily, quickly, and surely preventing leakage and having sustainability. <P>SOLUTION: This pipe leakage prevention device comprises a bag body 110 in surface contact with the outer peripheral surface of a pipe 200, a valve 120 for sealing by force-feeding a fluid into the bag body 110, and a frame body 130 installed around the bag body 110 and the pipe 200. The bag body 110 is deformed when the fluid is force-fed from the valve 120 thereinto, and closely fitted to the outer peripheral surface of the pipe 200 since the deformation is limited by the frame body 130. By closely adhering to the outer peripheral surface, a hole 210 formed in the pipe 200 is closed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe leakage prevention tool for closing a hole as an emergency measure and preventing leakage of a fluid flowing inside the pipe when a hole is formed in the pipe.

  When leakage of fluid flowing inside the pipe occurs from the hole formed in the existing pipe, the pipe system is first stopped, and then the pipe is replaced or repaired such as welding. However, when large repairs are not required, such as when holes and cracks are small, or when the apparatus cannot be stopped for a while, it is necessary to repair the piping while the apparatus is operating.

  As a conventional pipe repairing method, for example, in a water distribution pipe, a method of applying an epoxy resin adhesive to a hole formed in the water distribution pipe has been often used.

  Further, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 5-223197), for water leakage at the joint portion of the piping, a packing material such as rubber is installed around the joint portion, and a water blocking band is placed on the packing material. The method of fastening is also used.

Further, in Patent Document 2 (Japanese Patent No. 3453480), a member provided with a female screw hole at the center is bonded and fixed to a leaking portion existing on the outer surface of a pipe using an adhesive, and the short screw hole is formed in the female screw hole. A jig is disclosed in which a dimension bolt is screwed and integrated via a sealant. According to the said structure, it is supposed that a leakage prevention rate can be improved rather than the method using the above-mentioned epoxy resin adhesive, and the method of fastening a water stop band.
JP-A-5-223197 Japanese Patent No. 3453480

  However, the method of applying the epoxy resin adhesive to the holes is simple, but the flexibility of the epoxy resin is insufficient, so that the leakage prevention rate is low and the durability of the epoxy resin is unsatisfactory. Moreover, in the method of fastening the water stop band as described in Patent Document 1, the water leakage prevention rate is relatively better than when an epoxy resin adhesive is used, but it is suitable for various pipe diameters. Since it was necessary to prepare various types of water-stop bands, it was expensive and economically disadvantageous.

  Further, when the jig described in Patent Document 2 is used, it takes a long time to dry the adhesive for fixing the jig to the pipe, so that it is not suitable for an emergency treatment. In addition, when the above-mentioned jig is used for the suction piping, the components of the adhesive are mixed in the piping and become impurities, which may adversely affect the processing using the piping and cause a great deal of damage. It was. Further, once the jig is bonded to the pipe, it is impossible to reuse the jig itself, which is disadvantageous in terms of economy and environment.

  In view of this technical background, an object of the present invention is to provide a reusable pipe leakage prevention tool that can prevent leakage easily, quickly and reliably, and has excellent durability.

  In order to solve the above problems, according to an aspect of the present invention, a bag body that is in surface contact with the outer peripheral surface of a pipe, a valve for press-fitting a fluid into the bag body, and a bag body, A frame body that is installed by winding a tube, the bag body is deformed by press-fitting a fluid from a valve, and the deformation is limited by the frame body, and the bag body is in pressure contact with the outer peripheral surface of the tube, Provided is a pipe leakage prevention tool characterized by closing a hole formed in a pipe.

  That is, when a fluid is press-fitted (filled) into the bag body that is in surface contact with the outer peripheral surface of the pipe, deformation is limited by the frame body, so that the bag body is pressed against the outer peripheral surface between the two by the pressure of the fluid. To do. Thereby, the hole formed in the outer peripheral surface of a pipe | tube can be plugged up with a bag body, and the leak prevention effect of the fluid which flows through the inside of a pipe | tube is acquired reliably.

  Further, the present invention closes the hole by the pressing force without using an adhesive or the like, and therefore does not require time required for the adhesive or the like to solidify. For this reason, it is possible to prevent leakage of the fluid flowing through the inside of the pipe from the hole formed in the pipe very quickly. Moreover, since a bag body is installed in a pipe | tube only with a frame body, without using an adhesive agent etc., it can remove easily. Therefore, it can be reused, which is advantageous in terms of economy and environment.

  The surface which contacts the pipe | tube of the bag body in the above-mentioned piping leak prevention tool may have comprised the shape along the outer peripheral surface of a pipe | tube. As a result, the bag body can easily adhere to the outer peripheral surface of the pipe from the stage where the fluid pressure is low, and the holes formed in the pipe can be more reliably closed. Further, since the bag body is along the pipe before the fluid is press-fitted, the frame body can be easily wound around the bag body and the pipe, and workability can be improved.

  The film thickness of the bag body in the above-described pipe leakage prevention tool may be thicker at a portion not supported by the frame body. Tensile stress in the direction of expansion is applied to the portion of the bag that is not supported by the frame body by the pressure of the fluid press-fitted inside. For this reason, although the probability that a bag body will be easy to tear is high, the whole intensity | strength improves by making the part which is not supported by a frame as mentioned above thick, and a tear can be prevented. Therefore, it can be set as the bag body which can endure high pressure, and can be applied also to a pipe | tube with a high in-pipe pressure. On the other hand, by increasing the thickness of only the unsupported part, the flexibility of the bag body is improved and the adhesion is secured, and the increase in manufacturing cost is suppressed by reducing the material cost. Can do.

  The valve in the above-described pipe leakage prevention tool may be a check valve. Since the check valve moves the fluid only in one direction, it is easy to introduce the fluid into the bag body and the workability is improved.

  As described above, according to the pipe leakage preventing device according to the present invention, the bag body is pressed and brought into close contact with the hole formed in the pipe, thereby easily, quickly and reliably leaking the fluid flowing from the hole to the inside of the pipe. It is possible to provide a pipe leakage prevention tool that can be prevented and reused.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Note that dimensions, materials, and other specific numerical values shown in the following examples are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. Further, in the present specification and drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
A first embodiment of a pipe leakage preventing tool according to the present invention will be described. FIG. 1 is a diagram showing how the pipe leakage prevention tool according to the first embodiment is used. 2A and 2B are diagrams for explaining the configuration of the pipe leakage prevention device, in which FIG. 2A is a view for explaining a bag body, FIG. 2B is a view for explaining a frame body, and FIG. It is a figure explaining a procedure. FIG. 3 is a cross-sectional view illustrating a state in which a pipe leakage prevention tool is attached.

  As shown in FIG. 1, a pipe leakage preventing device 100 according to the present embodiment includes a bag body 110 that is in surface contact with the outer peripheral surface of a pipe 200, and a valve that seals the bag body 110 by fluid injection. 120 and a frame body 130 wound around the bag body 110 and the tube 200.

  Although there is no limitation on the shape of the bag body 110 shown in FIG. 2A, it is preferable that the bag body 110 has a generally flat shape in order to be deformed by the internal pressure. In particular, since it is necessary to be in close contact with the outer peripheral surface of the tube 200, it is preferable that at least the surface in contact with the tube 200 is a flat surface. Further, the size of the bag body 110 may be any size as long as it can sufficiently cover a hole 210 described later.

  The material of the bag body 110 may be any material having airtightness and flexibility (deformable property) that can be deformed by internal pressure. In addition, although the material of the bag body 110 may be provided with elasticity, in order to enclose a high-pressure fluid, it is better that the elasticity is small. The specific material can be appropriately selected according to the material, temperature, pressure, etc. of the fluid flowing through the target pipe 200. For example, when examining the temperature, as shown in FIG. 6, the heat resistant temperature of each material is examined, and a material in which the temperature of the target fluid falls within the safe heat resistant temperature can be suitably selected.

  The fluid press-fitted into the bag body 110 may be a gas or a liquid. However, it is preferable to use a gas because it is easy to apply pressure and is easy to handle. At this time, inexpensive and highly safe air, nitrogen gas, or inert gas can be suitably used as the gas. In the case of a liquid, inexpensive water can be suitably used.

  The valve 120 of the bag body 110 is provided to press-fit a fluid into the bag body 110 having airtightness. The valve 120 can be of any known configuration, and can be selected according to the fluid that fills the interior of the bag body 110. By providing the valve 120 in this way, the fluid filled inside can be drained. Therefore, the bag body 110 can be reused, which is advantageous in terms of economy and environment.

  The valve 120 may be a check valve that can only flow toward the inside. This eliminates the need to close the valve after the bag 110 is filled with fluid, so that it can be reliably press-fitted and workability can be improved.

  The frame 130 shown in FIG. 2B is installed so as to wind the bag body 110 and the pipe 200, that is, surround both. In other words, the frame body 130 is attached to the tube 200, and the bag body 110 is disposed between the tube 200 and the frame body 130. Since the frame body needs to be wound around the tube 200 while the apparatus is in operation, the frame body is not a continuous annular body but is configured to be connectable after being wound.

  There is no limitation on the material of the frame body 130, as long as it has rigidity or non-stretchability to resist the pressure received from the bag body 110. In the present embodiment, the frame body 130 is a rigid body made of a metal material. The frame body 130 is provided with a hinge 130a so as to be wound around the tube 200, and can be connected with a screw fastening portion 130b. The frame body 130 may be configured as two or more separate bodies that do not have a hinge portion. As another configuration, a flexible material such as nylon or polypropylene resin may be used, or a metal belt having a caterpillar structure may be used. In this case, the mechanism of the connecting portion may be configured to be hooked and connected by the engaging portion and the engaging portion in addition to the fastening method.

  In addition, when the pipe 200 is installed along the wall (or ceiling) and the frame cannot be inserted between the pipe 200 and the wall, the frame 130 has a flat surface such as a wall, ceiling, or floor at both ends. It may be one that can be fixed to.

  The material of the tube 200 itself is not limited, and the fluid flowing inside may be of any kind, temperature, and pressure. As described above, the material of the bag body 110 can be appropriately selected according to the type, temperature, and pressure of the fluid flowing in the pipe 200.

  A method for repairing the hole 210 formed in the pipe 200 using the pipe leakage preventing tool 100 according to the present embodiment will be described below.

  As shown in FIG. 2 (c), the bag body 110 is brought into surface contact with the hole 210 which is a leakage portion formed in the pipe 200. Next, the bag body 110 and the tube 200 are wound together by the frame body 130, and the fastening portion 130b is fastened and connected.

  Next, fluid is pressed into the bag body 110 through the valve 120 into the bag body 110. Thereafter, the valve 120 is closed to seal the fluid, and the bag body 110 is closed while maintaining the pressure.

  As shown in FIG. 3, when a fluid is press-fitted into the bag body 110 from the valve 120, the bag body 110 is deformed and pressed so as to be sandwiched between both the frame body 130 and the pipe 200. Then, since the frame body 130 is a rigid body or a non-stretchable material, the deformation of the bag body 110 is restricted, and the bag body 110 comes into pressure contact with the outer peripheral surface of the tube 200. Therefore, the bag body 110 can be closed by matching the position of the hole 210 formed in the tube 200. For this reason, the leakage of the fluid flowing through the inside of the pipe from the hole 210 formed in the pipe 200 can be prevented.

  That is, according to the present embodiment, the hole 210 formed in the outer peripheral surface of the tube 200 can be closed by press-fitting a fluid into the bag body 110 that is in surface contact with the outer peripheral surface of the tube 200, which is simple, quick, and It is possible to reliably prevent leakage of fluid flowing from the hole 210 to the inside of the pipe.

  Moreover, since the pipe leak prevention tool 100 according to the present embodiment closes the hole 210 by a pressing force without using an adhesive or the like, it does not require time required for the adhesive or the like to solidify. For this reason, the leakage of the fluid flowing through the inside of the pipe from the hole 210 formed in the pipe 200 can be prevented quickly. In addition, since the bag body 110 is installed on the tube 200 using only the frame body 130 without using an adhesive or the like, it can be easily removed. For this reason, the pipe leakage prevention tool 100 and the pipe 200 can be reused, which is advantageous in terms of economy and environment.

(Second embodiment)
A second embodiment of the pipe leakage preventing tool according to the present invention will be described. About the part which overlaps with said 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. FIG. 4 is a view for explaining a bag body according to the second embodiment.

  In the first embodiment, it has been described that the bag body 310 of the pipe leakage prevention tool 100 preferably has a flat surface in contact with the outer peripheral surface of the pipe 200. However, if it is certainly a flat surface, it can be brought into close contact with the outer peripheral surface, but the bag body 310 needs to be entirely curved along the outer peripheral surface of the tube 200. This requires pressure to bend the bag 310 as a whole (not used for close contact) and there is a loss of energy.

  Therefore, as shown in FIG. 4, in the present embodiment, the contact surface 310 a that contacts the tube 200 of the bag body 310 is formed so as to form a shape along the outer peripheral surface of the tube 200 from the beginning. As a result, the bag 310 is likely to be in close contact with the outer peripheral surface of the pipe 200 from the stage where the fluid pressure is low, and the hole 210 formed in the pipe 200 can be more reliably closed. In addition, since the bag body 310 is along the pipe 200 before the fluid is press-fitted, the frame body 130 can be easily wound around the bag body 310 and the pipe 200, and workability can be improved.

(Third embodiment)
A third embodiment of the pipe leakage preventing tool according to the present invention will be described. About the part which overlaps with said 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. FIG. 5 is a diagram illustrating a bag according to the third embodiment.

  In said 1st embodiment, it demonstrated that the film | membrane pressure of the bag body 110 of the piping leak prevention tool 100 should just be able to endure a pressure. However, a tensile stress in a direction of expanding due to the pressure of the fluid press-fitted inside acts on a portion of the bag that is not supported by the frame. For this reason, since the bag body is easily torn at the unsupported portion, it is necessary to increase the membrane pressure as a whole in order to withstand the high pressure.

  Therefore, as shown in FIG. 5, in this embodiment, the film pressure of the side surface portion 410a that is not supported by the frame body of the bag body 410 is formed to be thicker than the other portions. As a result, the strength of the side surface portion 410a can be improved and tearing can be prevented. Therefore, it can be set as the bag body which can endure higher pressure, and can be applied also to a pipe | tube with a high in-pipe pressure. In addition, the thickness of only the side surface portion 410a is increased compared to increasing the overall film pressure, thereby improving the flexibility of the bag body to ensure adhesion and increasing the manufacturing cost by reducing the material cost. Can be suppressed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in each of the above embodiments, the bag body and the frame body have been described as separate members. However, the present invention is not limited to this, and the bag body is attached and fixed to a predetermined position of the frame body in advance by bonding or the like. Also good. Thereby, workability | operativity can be improved further.

  In the above-described embodiment, an example in which a hole formed in a pipe is closed has been described. However, the present invention is not limited to this example, and the present invention can be applied to closing a hole formed in a plane.

  INDUSTRIAL APPLICATION When a hole is formed in piping, this invention can be utilized as a piping leak prevention tool for plugging a hole as an emergency measure and preventing the leakage of the fluid which flows through the inside of a pipe | tube.

It is a usage condition figure of the piping leak prevention tool concerning a first embodiment. It is a figure explaining the structure of a piping leak prevention tool. It is sectional drawing explaining the state which attached the piping leak prevention tool. It is a figure explaining the bag concerning 2nd embodiment. It is a figure explaining the bag concerning a third embodiment. It is a figure explaining the resin material and the heat-resistant temperature about each material.

Explanation of symbols

100 Pipe leakage prevention tool 110, 310, 410 Bag body 120 Valve 130 Frame body 200 Pipe 210 Hole

Claims (4)

A bag body in surface contact with the outer peripheral surface of the tube;
A valve for press-fitting a fluid into the bag body for sealing;
A frame body that is installed by winding the bag body and the tube,
The bag body is deformed by press-fitting a fluid from the valve, and the deformation is restricted by the frame body so that the bag body is in pressure contact with the outer peripheral surface of the tube and closes the hole formed in the tube. Piping leak prevention device characterized by   The pipe leakage prevention tool according to claim 1, wherein a surface of the bag body that contacts the pipe has a shape along an outer peripheral surface of the pipe.   The pipe leakage prevention tool according to claim 1, wherein the bag body is formed to have a film thickness that is thicker in a portion that is not supported by the frame than in a portion that is supported.   The pipe leakage prevention tool according to claim 1, wherein the valve is a check valve.

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