JPH08178171A - Hose-like air bag - Google Patents

Abstract

PURPOSE: To bring a central part into pressure adhesion to a line for sewage, when the central part is expanded during filling of it with air and to prevent remaining of an air reservoir on an outer surface and in a repair spot by a method wherein a first reinforcing layer formed of fibers is formed in each of the two end parts of a hose-form airbag. CONSTITUTION: When a hose-form air bag H formed of a flexible material serving as a main member and when, with the two end parts thereof closed, filling with an internal pressure is effected, the outside diameter of the central part of the hose-form bag H is expanded to 50% or more. A first reinforcing layer 2 formed of fibers arranged in parallel in the longitudinal direction of the hose-form air bag H is arranged at the interior of each of two end parts. Since, as noted above, the two end parts, being apt to rupture, of the hose-form air bag H are reinforced with fibers. By smoothly connecting deformation of the end part and the central part, durability of the part is improved. Since the central part is not reinforced by the fibers, when filling with air is effected, the central part is expanded and forced into pressure adhesion to a line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used for repairing cracks and holes in pipes and the like, in which the surface of a hose-shaped air bag before expansion is entrained with resin such as glass wool and the like. The present invention relates to a hose-shaped air bag that is inflated by inflating it when it reaches the repair location by pressing glass wool against the inside of the conduit for repair.

[0002]

2. Description of the Related Art Conventionally, hose-shaped bladders, which have been mainly used for repairing cracks and holes in pipes and the like, are made only of flexible materials such as rubber, so that the metal fittings at both ends are destroyed early. I often do it. Therefore, a hose-shaped air bag made of a flexible material such as rubber having a reinforcing layer of fibers arranged in parallel with the longitudinal direction of the hose-shaped air bag over the entire hose-shaped air bag is used. Since it cannot be stretched in the longitudinal direction of the hose, the outer surface of the hose-shaped air bag before expansion is entrained in glass wool, etc. When crimping and repairing, there is a problem that it does not surely crimp inside the conduit because it does not expand sufficiently. Also, when air is put into the hose-shaped air bag to expand it and crimp it inside the pipeline, air will be left behind between the outer surface of the hose-shaped air bag and the repaired part, etc. There is also a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made as a result of investigations aimed at solving such problems of the prior art, and an object of the present invention is to break a hose-shaped air bag. Durability is improved by reinforcing both ends with fibers, and the center part expands sufficiently when it is filled with air so that it can be crimped to the pipeline such as sewage. It is to provide a hose-shaped bladder that does not leave air pockets or the like at repair points.

[0004]

The present invention adopts the following constitution in order to achieve the above object. That is,
A hose-shaped air bag made of a flexible material as a main member, and when the inner pressure is filled with both ends closed, the outer diameter of the central part of the hose-shaped air bag expands by 50% or more, and both ends Is characterized by having a first reinforcing layer of fibers arranged in parallel with the longitudinal direction of the hose-shaped air bag. Further, a second reinforcing layer made of fibers arranged substantially at right angles to the longitudinal direction of the hose-shaped bladder is provided inside both ends in the radial direction of the first reinforcing layer, and the hose-shaped bladder of the first reinforcing layer is provided. It is preferable that the length from the end portion in the longitudinal direction is equal to or longer than the length of the second reinforcing layer. This is because the second reinforcing layer is reinforced by the fibers arranged substantially at right angles to the longitudinal direction of the hose-shaped air bag, the outer diameter hardly increases even when the internal pressure is filled, and thus the portion with the reinforcing layer does not exist. When the boundary is located in this part, the rigidity difference in the longitudinal direction is remarkably increased, and the fracture occurs from this part. On the other hand, since the first reinforcing layer is reinforced by the fibers arranged in parallel with the longitudinal direction of the hose-shaped air bag, when this portion is at the boundary with the portion without the reinforcing layer, this portion can increase the outer diameter. Therefore, the rigidity difference in the longitudinal direction does not become so large and does not cause a fracture. Here, as the reinforcing fibers, for example, general fibers such as nylon, polyester, and vinylon can be used.

Furthermore, it is preferable to dispose a plurality of ridges parallel to the longitudinal direction of the hose-shaped air bag on the outer surface of the hose-shaped air bag because air or the like can escape along the ridge during pressure bonding.

[0006]

The present invention improves the durability of this portion by reinforcing the ends of the hose-like air bag, which are easily broken, with fibers to smoothly connect the deformation of the end portion and the center portion, Since the central portion is not reinforced with fibers, it can be sufficiently expanded and filled with pressure when it is filled with air. Furthermore, since a ridge parallel to the hose-shaped air bag is arranged on the outer surface of the hose-shaped air bag, when the hose-shaped air bag is inflated and pressure-bonded to the pipe line, air pockets on the outer surface escape from the groove formed by the ridge. Repair work can be done without it.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a hose-shaped air bag K of the present invention, and FIG. 2 is a sectional view thereof. The structure of the hose-shaped air bag H in this embodiment is mainly used for repairing cracks and holes in pipes and the like, and the inner surface rubber 1 and the hose-shaped air bag on both outer ends thereof. First reinforcing layer 2 made of nylon fibers arranged parallel to the longitudinal direction
And a second reinforcing layer 3 made of nylon fibers arranged substantially perpendicular to the longitudinal direction of the hose-shaped air bag at both outer ends of the reinforcing layer 2, the first reinforcing layer being the hose-shaped air bag. The length of the second reinforcing layer is 30 cm from the end along the longitudinal direction, and the length of the second reinforcing layer is also 15 cm. Although not shown, the reinforcing layers 2 and 3 are each covered with rubber so that the fibers do not come into contact with each other. Further, an outer rubber is provided on the outer side for protection from external damage, and a ridge having a height of 0.5 mm and a width of 1 mm is provided.

In FIG. 3, an internal pressure holding pipe 8 having a length substantially the same as that of the hose-shaped air bag H is inserted, and both ends are fixed by mounting bands 11 so that air does not leak, and then a metal supply / exhaust pipe 6 is provided. FIG. 7 is a partial cutaway view showing that the inner pressure filling is performed at 0.8 kg / cm ² through the air receiving port 9. The internal pressure holding pipe 8 is made of an aluminum alloy in order to reduce the weight, and an air receiving port 9 is stamped in the substantially central portion,
Further, an air receiving coupler 10 is provided. The hose-shaped air bag H is fixed to the internal pressure holding pipe 8 with the mounting band 11. However, unless the length of the mounting band 11 is made shorter than the length of the second reinforcing layer, the meaning of adopting the second reinforcing layer is meant. Be careful because there is no. When the inner pressure of the hose-shaped air bag H is zero, the surface of the hose-shaped air bag H is filled with glass wool impregnated with a resin not shown in the figure, put into the pipeline, and when it reaches the repair location, air is supplied from the air supply / exhaust pipe 6. Put it in and inflate it and crimp glass wool to the inside of the conduit to repair it. At this time, since a ridge is provided on the outer surface of the hose-shaped air bag, air is allowed to escape through the groove of the ridge so that air is not accumulated with the glass wool impregnated at the time of pressure bonding. The groove formed by the ridge becomes almost invisible when the hose-shaped air bag H is inflated by introducing air.

Further, since the internal pressure holding pipe has the water passage 13, it is possible to carry out repair work even if the inside of the pipe is in a water-passing state. When the inside of the pipeline is not in a water-permeable state, the same effect can be obtained by mounting one nipple (not shown) at both ends instead of the internal pressure holding pipe 8 and fixing the nipple so that air does not leak. In this case, one of the nipples needs an air hole for the air supply / exhaust pipe and a coupler.

[0010]

As is apparent from the above description, since the hose-shaped air bag according to the present invention, which is mainly used for repairing cracks and perforations in pipes and the like, has been reinforced at both end portions which are conventionally fragile, The durability can be remarkably improved.
Further, since no reinforcing agent is provided in the central portion, when filled with air, it expands sufficiently and is pressed against the pipe line to obtain a sufficient repair effect. Furthermore, since a plurality of ridges are provided on the outer surface of the hose-shaped air bag in parallel with the longitudinal direction of the hose-shaped air bag, no air pockets or the like occur and the repaired area is not finished unevenly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front sectional view showing an embodiment of the present invention.

FIG. 3 is a diagram in which an internal pressure holding pipe is attached to the hose-shaped air bag of the present invention to inflate air for expansion.

[Explanation of symbols]

 H Hose-shaped air bag 1 Inner surface rubber 2 First reinforcing layer 3 Second reinforcing layer 4 Outer surface rubber 5 Ridge 6 Supply / exhaust pipe 7 Supply / exhaust pipe connecting coupler 8 Internal pressure holding pipe 9 Air receiving port 10 Air receiving port coupler 11 Mounting band 12 Internal pressure Expansion section 13 Water passage

Claims (3)

[Claims] 1. A hose-shaped air bag made of a flexible material as a main member, wherein when the inner pressure of the hose-shaped air bag is filled with both ends of the hose-shaped air bag closed, the hose-shaped air bag is exposed outside. The diameter expands by 50% or more, and inside both ends,
A hose-shaped air bag having a first reinforcing layer made of fibers arranged in parallel with the longitudinal direction of the hose-shaped air bag. 2. A second reinforcing layer made of fibers arranged substantially at right angles to the longitudinal direction of the hose-shaped air bag inside the both end portions, wherein the first reinforcing layer is formed from the end portion of the hose-shaped air bag. The hose-shaped air bag according to claim 1, wherein the length is not less than the length of the second reinforcing layer along the longitudinal direction. 3. The hose-shaped air bag according to claim 1, wherein a plurality of ridges parallel to the longitudinal direction of the hose-shaped air bag are arranged on the outer surface of the hose-shaped air bag.