JP4034437B2 - Pipe opening and closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of an opening / closing device in water supply or sewage pipelines.
[0002]
[Prior art]
Water or sewage usually flows in a concrete pipe having a circular or rectangular cross section, and the work is performed by stopping the flow of water during a downstream accident or maintenance in the pipe. In general, the water stop in this pipe is divided with a hard plate gate, but it is almost impossible to open and close the gate when the pipe is buried in the soil. In order to install a hard-plate gate opening / closing device, a large-scale facility is required, and the cost cannot be increased.
[0003]
For this reason, in recent years, a flexible membrane bag that can be inflated with a fluid has been provided in the pipeline, and when water in the pipeline is required, water or air is introduced into the flexible membrane. Means are used for injecting and filling the flexible membrane bag to close the conduit. Such an opening / closing means includes a support having a flexible membrane bag mounted at a required portion of a pipeline, and a pipe for supplying fluid into the flexible membrane bag. The flexible membrane bag body swells and closes the pipeline. To ensure the closure, a seal rib is provided on the pipeline side, and the rib and the expanded flexible membrane bag body are pressed against each other. And stop the water.
[0004]
However, the sealing ribs ensured the water stoppage, but on the other hand, the manufacturing error of the flexible membrane bag, the difference in fixing with the support, and the construction in the pipeline It was difficult to maintain the water-stopping performance unless the accuracy of the manufacturing and construction such as the accuracy of the surface and the finish of the surface in the pipe line was good.
[0005]
In particular, in terms of the relationship between the seal rib and the flexible membrane bag body, the circumference of the flexible membrane bag body when the bulge is larger than the circumference of the seal rib fixed to the conduit has been applied. In such a case, a gap is generated between the two and water stoppage is not completely performed. On the other hand, when the circumference of the rubber membrane bag is longer, a gap is generated between the flexible membrane bag and the presser fitting of the flexible membrane bag.
[0006]
[Problems to be solved by the invention]
The present invention provides a pipe opening and closing device that makes water stop even when such manufacturing and construction accuracy is poor.
[0007]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, and the gist of the present invention is that fluid is supplied to and discharged from the flexible membrane bag provided in the conduit, and the flexible membrane bag is inflated. -In a pipeline opening / closing device that opens and closes a pipeline, a seal rib is provided in the pipeline where the flexible membrane bag is inflated, and a packing material protrudes along the seal rib. The flexible membrane bag at the time of expansion is brought into contact with the packing material.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The pipe opening and closing device of the present invention has the above-described structure, and is expanded by supplying a fluid into the flexible membrane bag, and this is provided with a seal rib provided in a seal rib provided inside the pipe. The material is pressed against the material to improve the water-stopping property. Therefore, the opening and closing of the switchgear can be reliably performed even if the manufacturing or construction accuracy of the switchgear is not always good, and its practicality is high. .
[0009]
In general, the flexible membrane bag is a rubber membrane bag containing a fiber reinforcing material, the seal rib is made of metal or hard plastic, and the packing material to be attached to this is a rubber or resin elastic body. It is. Of course, it is a person provided with a pump that supplies and discharges fluid into the flexible membrane bag, and the fluid supplied into the flexible membrane bag is water or air.
[0010]
【Example】
Hereinafter, the pipe opening and closing device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view when the pipe opening / closing device of the present invention is mounted in a pipe, and FIG. 2 is a perspective view when the flexible membrane bag body is inflated. In the figure, reference numeral 1 denotes a pipe having a rectangular cross section, and the pipe opening / closing device 2 is attached to the bottom 1a and both sides 1b and 1c by an arbitrary means.
[0011]
The conduit opening / closing device 2 includes a flexible membrane bag body 4 and a metal fitting for fixing the flexible membrane bag body 4 to the conduit, and usually the flexible membrane bag body 4 can be directly fixed to the conduit. However, in some cases, the U-shaped hard plate 3 to which the flexible membrane bag body 4 is attached is fixed to the conduit. The flexible membrane bag 4 is a rubber membrane bag with a fiber reinforced cloth embedded therein. In the following, the example using the U-shaped hard plate 3 will be further described. The edge of the hard plate 3 and the edge of the rubber film bag body 4 are attached to the both side portions 1b and 1c of the pipe line 1 by holding metal fittings. 5 is fixed. In this example, the seal rib 6 is attached by being sandwiched between the presser fittings 5 and 5. Of course, this attachment site is a place where the rubber film bag body 4 is inflated and abuts on both sides 1b and 1c and the ceiling 1d of the pipe.
[0012]
That is, when the pipe line 1 is closed, a fluid is sent from the pump 7 into the rubber film bag body 4, the rubber film bag body 4 is inflated, and pressed against the seal rib 6 to stop water. In the present invention, the seal rib 6 is provided with a packing material 8 projecting from the seal rib 6 at the edge of the seal rib 6 facing the pipe 1, and the rubber film bag body 4 is attached to the packing material 8. The gap between them is eliminated by utilizing the elastic deformation of the packing material 8.
[0013]
FIG. 3 shows the seal rib 6 and the packing material 8 taken out. In this example, a groove 9 is formed at the edge of the seal rib 6, and a long packing made of a rubber elastic body is formed in the groove 9. The material 8 is fitted. The film body 4 is in full pressure contact with the packing material 8 to eliminate the gap.
[0014]
FIG. 4 is a front view of the pipe line, and an opening / closing device is fitted into the pipe line 1, and in this example, the hard plate 3 and the rubber film bag body 4 are fixed to the both side portions 1 b and 1 c by the presser fitting 5. . On the other hand, the seal rib 6 is also sandwiched and fixed by the presser fitting 5, and the seal rib 6 is provided along both side portions 1 b and 1 c and the ceiling portion 1 d of the pipe line 1.
[0015]
FIG. 5 is an enlarged view of the vicinity of the presser fitting 5, and the seal rib 6 is sandwiched and fixed between the pair of presser fittings 5 and 5, and the packing material 8 is provided so as to protrude from the seal rib 6.
[0016]
As can be seen from these drawings, the packing material 8 is provided so as to protrude from the peripheral edge of the seal rib 6, and when the rubber film bag body 4 is inflated, the packing material 8 must be packed before contacting the seal rib 6. The material 8 is brought into pressure contact, and the elastic deformation of the packing material 8 is used to eliminate the gap and increase the water stop effect.
[0017]
FIG. 6 shows another example of the seal rib 6 and the packing material 8, in which a plate-shaped packing material 8 is mounted on one surface of the seal rib 6. An arbitrary means is selected for the integration of both of them, and for example, they may be integrated with an adhesive, or may be integrated using bolts and nuts.
[0018]
FIG. 7 shows still another example of the seal rib 6 and the packing material 8, in which two seal ribs 6 are used and integrated with a packing material interposed therebetween. In this case also, it is integrated with an adhesive or the like, but in this example, it is an example in which it is integrated with a bolt 10 and a nut.
[0019]
【The invention's effect】
The pipe opening and closing device of the present invention has the above-described structure, and the expanded flexible membrane bag body and the packing material attached to the seal rib are in contact with each other. There is no gap between them. For this reason, even if there is a problem in the accuracy of the pipe line or the pipe opening / closing device side, the water stop effect is sufficient.
[Brief description of the drawings]
FIG. 1 is a perspective view of a pipe opening / closing device according to the present invention mounted in a pipe.
FIG. 2 is a perspective view when a flexible membrane bag body is inflated.
FIG. 3 is a view particularly showing the seal rib and packing material taken out.
FIG. 4 is an enlarged front view of a pipeline.
FIG. 5 is an enlarged view of the vicinity of the presser fitting 5;
FIG. 6 is a partial cross-sectional view showing another example of a seal rib and a packing material.
FIG. 7 is a partial cross-sectional view showing still another example of seal ribs and packing materials.
[Explanation of symbols]
1. Pipe line,
1a ... bottom of pipe,
1b, 1c ... both sides of the pipeline,
1d ... the ceiling of the pipeline,
2. Pipe line opening / closing device,
3. Hard plate
4. Flexible membrane bag body,
5. Presser bracket,
6. Seal rib,
7. Pump,
8 Packing,
9 ... groove
10 ... bolts.

Claims (6)

A flexible membrane bag is inflated in a conduit opening and closing device that opens and closes a conduit by supplying and discharging fluid into and out of the flexible membrane bag provided in the conduit. A seal rib is provided in the pipe line of the portion to be performed, and a packing material is projected and attached along the seal rib, and the flexible membrane bag body at the time of expansion is brought into contact with the packing material. Pipeline opening and closing device.  2. The conduit opening and closing device according to claim 1, wherein the flexible membrane bag is a rubber membrane bag containing a fiber reinforcing material.  2. The pipe opening and closing device according to claim 1, wherein the seal rib is made of metal or hard plastic.  2. The pipe opening and closing device according to claim 1, wherein the packing material is an elastic body made of rubber or resin.  The conduit opening and closing device according to claim 1, further comprising a pump for supplying and discharging fluid to and from the flexible membrane bag.  6. The pipe opening and closing device according to claim 5, wherein the fluid is water or air.

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