JPH072774Y2 - Water stoppage tools for construction of sewer pipes - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention removes and cleans the sediment, sludge and foreign substances accumulated inside various sewer pipes buried underground, and flows through the sewer pipes when repairing damaged parts of each sewer pipe. The present invention relates to a water stoppage tool for construction of a sewer pipe that is temporarily fitted into a construction pipe to safely remove and repair foreign matters inside while guiding a part of fluid such as water. .

[0002]

2. Description of the Related Art Conventionally, in this type of water shut-off device for a sewer pipe, a metal pipe is inserted into the inner center of a hollow body made of an elastic body, and several bamboo ring-shaped projections are formed on the outer periphery to maintain airtightness. It is known to do so.

[0003]

The water-stopping tool described in the prior art has a wide surface contact with the inner peripheral surface of the pipe, so that the inner surface of the pipe and the water-stopping tool are joined by water pressure or soil. There was a problem that it could not withstand the pressure due to the pressure and could easily move, causing muddy water and sediment to flow out. The present invention has been made in view of the above-mentioned problems of the conventional technology, and the object thereof is to provide a water-stopping tool which is inserted and pressure-contacted to the end of the pipe. An object of the present invention is to provide a water stoppage tool for a sewer pipe, which can firmly move and firmly fix, and can reliably exhibit a water stoppage effect with respect to watertightness.

[0004]

In order to achieve the above object, a water shut-off tool for construction of a sewer pipe according to the present invention is an elastic pipe body inserted into the sewer pipe and a metal cylinder body holding the fitting. It is constructed by connecting with. Spaced portions and press contact projections are alternately provided on the outer circumference of the elastic cylindrical body having a hollow interior, and concave arc portions and press contact portions are formed on the outer circumference of the press contact projections. Further, the intended purpose is achieved by inserting an exhaust pipe and a horizontal air pipe into the inner bottom plate of the metal cylinder.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to the drawings, an embodiment of the present invention will be described. The water shutting tool main body (1) to be inserted from the end of the inner wall of various pipes (A) buried in the ground is ), And an elastic tube body (2) and a metal tube body (3) to which the elastic tube body (2) is attached. The elastic tube body (2)
Is formed of an elastic body made of a material such as a synthetic resin or a synthetic protective film that expands and contracts by the pressure action of air. Further, the elastic cylindrical body (2) is formed into a hollow cylindrical shape, and a predetermined gap portion (6) (6) ... Are formed alternately. Further, the press contact protrusions (5) and (5) are formed with concave arc portions (7) and (7) at the center of the outer circumference, and the concave arc portions (7) and (7) are formed.
The pressure contact portions (8) and (8) are formed on both sides of each.

Next, the metal cylindrical body (3) has an inner bottom plate (10) at a portion integrally attached to the elastic tube body (2), and the inner bottom plate (10) has a central portion. An exhaust pipe (11) made of metal or the like penetrating the elastic tube (2) is provided in the elastic tube (2), and an air discharge port ( Horizontal air pipes (15) having 17) are arranged side by side. In addition, the drainage connecting pipe (1) is connected through a connecting portion (12) provided at the end of the exhaust pipe (11).
3) are connected. Reference numeral (14) is the horizontal air pipe (1
5) shows an air supply tube insertion hole which is inserted through, and (16) shows a connecting air supply tube connected to the horizontal air supply tube (15). Reference numeral (19) denotes a screw hole into which the fixing screw (20) is screwed.

[0007]

The present invention is constructed as described above, and its usage will be described below. The elastic tube body (2) of the water shutting tool body (1) is inserted into the piping (A) for various works. , Connected air pipe (16) and horizontal air pipe (15) from the air supply from the outside
Through the air discharge port (17) into the elastic tube body (2) and inflating it, and the inner wall of the pipe (A) is crimped by the pressure contact projection (5) of the elastic tube body (2). Then, the flow in the construction pipe (A) is blocked. At this time, the press contact portions (8) and (8) on the outer circumference of the press contact protrusion (5) are tightly pressed against the inner surface of the pipe (A) to make them immovable, and are reliably blocked to maintain watertightness. It is a thing. Then, the drainage pipe (11) is used to connect and drain water without stopping the water.

[0008]

As described above, according to the waterproofing tool of the present invention, the fitting is securely fitted to the pipe to maintain the watertightness,
There is an effect that various pipes can be easily removed and that cleaning work or repair work can be surely performed without stopping drainage. Further, since the water shutting tool main body is formed integrally with the elastic tube body and the metal cylinder body, the elastic tube body is stably fixed, and the insertion inside the pipe can be securely inserted without deformation. effective. Further, since the space and the press contact projection are alternately formed at a predetermined interval on the cylindrical outer periphery of the elastic tube body, the whole is firmly formed and the crimpability to the inner surface of the pipe is enhanced. effective. Further, by forming a concave arc portion on the outer periphery of the pressure contact protrusion and pressure contact portions on both sides of the outer periphery,
It has an effect of obtaining high pressure-bonding property and watertightness on the inner surface of the repair pipe. Further, the inner bottom plate provided on the metal cylinder body has an effect of securely supporting the elastic tube body and stably and firmly fixing the exhaust pipe and the horizontal air supply pipe.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical side view showing a state in which the water shut-off tool of the present invention is used in a pipe.

FIG. 2 is a side view of the whole of the present invention.

FIG. 3 is a vertical cross-sectional side view in which the metal cylinder of the present invention is partially cut away.

FIG. 4 is a sectional view of a part of the elastic tube body of the present invention, which is partially cut away.

[Explanation of symbols]

 A piping 1 water-stopping tool main body 2 elastic tube body 3 metal cylinder body 5 pressure contact projection 6 spacing portion 7 concave arc portion 8 pressure contact portion 10 inner bottom plate 11 exhaust pipe 15 horizontal air pipe

Claims (1)

[Scope of utility model registration request] 1. A water-stopping tool for construction of a sewer pipe, which is arranged and blocked in a construction pipe to be repaired, wherein the water-stopping tool body (1).
Is integrally formed of an elastic tube body (2) and a metal tube pair (3), and the elastic tube body (2) is an elastic body as a whole and is formed into a hollow cylindrical shape. On the outer circumference of the elastic tube body (2), predetermined spacing portions (6) and (6) are provided to alternately form pressure contact projections (5) and (5), and the pressure contact projections (5) and (5) are formed. Is
A concave arc portion (7) is provided on the outer periphery, and pressure contact portions (8) and (8) are formed on both sides of the concave arc portion (7), and the inner bottom plate (10) is formed on the metal cylinder body (3). On the other hand, the exhaust pipe (11) and the horizontal air pipe (15) are inserted, the drainage connection pipe (13) is connected to the exhaust pipe (11), and the horizontal air pipe (15) is connected to the horizontal air pipe (16). ) Is a water stop tool for construction of sewer pipes.