JP2594164B2 - Water stopper device for water pipe and method of inverting manhole using such device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a water stopper device for a water pipe useful for inverting manholes and a method of inverting manholes using the water stopper device.

[Prior Art] Conventionally, in so-called inverting work such as repair work, cleaning work, and the like at the bottom of a manhole, sewage discharged from a water pipe such as a fume pipe flows through the bottom of the manhole. As a result, a great deal of labor and difficult work were forced. Usually, this work was temporarily stopped by work such as mortar or sandbags, and the required inverting work was immediately performed.

[Problems to be Solved by the Invention] However, in the inverting work, the required work must be carefully and promptly performed in a narrow and dark place such as the bottom of a manhole and in a poor working environment.
Some work time is required.

However, the conventional water stopping means is only a temporary make-up, and often causes unexpected situations such as gradually seeping out from the damming portion or breaking down. Therefore, a water stopper device for a water pipe capable of performing the manhole inverting operation with high working efficiency under a suitable working environment without worrying about time and without being disturbed by water at the bottom of the manhole, and this device. The emergence of a manhole inverting work method using it has been awaited.

[Means for Solving the Problems] The above-mentioned problem is caused by that air is blown into an outer peripheral portion of a cylindrical body formed by inserting a drain pipe provided with a valve, and the inner peripheral portion of the water pipe is brought into close pressure contact with the water pipe. A tube that can be freely closed is mounted, and a water passage through hole is formed on the side surface of the cylindrical body with the tube mounted on the outer periphery in the upstream side of the water flow pipe. A plate having a diameter larger than the outer diameter is connected, and a hollow plate having an outer periphery having the same diameter as the plate is connected to the outer peripheral end of the cylindrical body in the downstream direction of the water pipe. A flange portion for supporting the tube with the body, an air hole for the tube penetrates the cylinder body and is exposed on the inner surface of the cylinder body, and the drainage pipe has a rubber hose or the like according to a length of a bypass passage. Connection pipes can be connected. In the water stopper device for the water pipe and the manhole inverting work, first, the air is blown into the water pipe on the upstream side of the manhole by sending air to the outer periphery of the cylindrical body through which a drain pipe with a valve is inserted. A tube capable of tightly contacting the inner periphery of the water tube and closing the water tube freely is mounted, and a water passage penetrating through the side surface of the cylindrical body having the tube mounted on the outer periphery in the upstream direction of the water tube. A hollow plate having a hole formed therein and having a larger diameter than the outer diameter of the cylindrical body connected thereto and having an outer circumference of the same diameter as the plate at an outer circumferential end of the cylindrical body in a downstream direction of the water pipe. And connect
A flange portion for supporting the tube is formed by the two plates, and an air hole for the tube penetrates the cylinder and is exposed on the inner surface of the cylinder, and the drain pipe has a length of a bypass passage. A water stopper device that allows connection of a connecting pipe such as a rubber hose according to the condition is attached.The drain pipe or a connecting pipe such as a rubber hose connected to the drain pipe is passed through the bottom of the manhole and passed through the water pipe on the downstream side. Inject air into the tube of the stopper device, inflate it, close the upstream water pipe, open the valve, and directly drain to the downstream water pipe without draining inside the manhole, to achieve a water-free state without obstruction of water Perform the required inversion work at the bottom of the manhole, and after the work is completed, bleed air from the tube of the water stopper device and walk through the water pipe on the upstream side. Is solved by inverting working methods manhole, characterized in that removing the over stopper device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a water stopper device of the present invention,
This water stopper device is provided with a tube 2 which is swelled by injecting air to make close pressure contact with the inner periphery of the water pipe, which can freely close the water pipe, and which is mounted on the outer periphery of the tube 2 and has a valve 3 therein. And a cylindrical body 5 through which the drain pipe 4 is inserted.

The water stopper device 1 is set in a water pipe 7a on the upstream side of a water pipe 7 composed of a fume pipe located at the bottom of the manhole 6. Here, the configuration of the water stopper device 1 will be described in more detail.

That is, the tube 2 is mounted on the outer periphery of the cylindrical body 5. In the present embodiment, a water through hole 8 a is formed on one side of the cylindrical body 5 in the upstream direction with respect to the water pipe 6. A disk 8 having a larger diameter than the outer diameter of the cylindrical body 5 is connected, and a hollow plate 9 whose outer circumference has the same diameter as the disk 8 is replaced with a tube 2 at the outer end in the opposite direction. The disk body 8 and the hollow plate body 9
A flange portion for supporting the tube 2 and preventing detachment from the cylindrical body 5 is formed. Unless the hollow plate 9 is joined to the tube 5 in a very strong screwed state, the hollow plate 9 is swelled by the swelling pressure of the tube 2 when air is sent into the tube 2. Since the screwed state of 9 may be released, it is of course possible to form the hollow plate 9 integrally with the cylindrical body 5 in advance.

Reference numeral 10 denotes an air hole, which penetrates the cylinder 4 and is exposed on the inner surface of the cylinder 4.

Further, in the drain pipe 4 provided with the valve 3, it is possible to connect a rubber hose 11 having high flexibility according to the length of the bypass passage.

In the so-called manhole inverting work in the present invention according to the above configuration, first, the water stopper device 1 according to the above configuration is attached to the water pipe 7a on the upstream side of the manhole 6.

Next, the drain pipe 4 or a rubber hose connected to the drain pipe 4
A flexible connection pipe such as 11 is passed through the bottom of the manhole 6 and passed through the downstream water pipe 7b.

Next, air is sent from the air hole portion 10 to the tube 2 of the water stopper device 1 to inflate the tube 2 and close the upstream water pipe 7. Then the valve 3 of the drain pipe 4
And drain the upstream water to the bottom of the manhole 4 without passing through the drain pipe 4 or the connecting pipe,
Drain directly to the downstream water pipe 7b.

Therefore, the bottom of the manhole 4 is in a non-water-permeable state, so that the worker can perform a required inverting operation in a suitable environment without worrying about time.

After the work is completed, release the air from tube 2
7a, the water stopper device 1 can be removed quickly and easily.

[Effects of the Invention] According to the present invention, however, it is indispensable to perform complicated and difficult work, such as conventional inverting work, within a very limited time, and to exude sewage, etc. It is completely different from work in a bad environment where there is a risk of accidents such as collapse, and it can be performed with sufficient time according to the work content, and it requires complete water-free condition The workability is good because the time can be perfectly maintained, and the manhole inversion work, which requires enormous labor, complicated and difficult work during sewerage work, can be performed efficiently and safely and reliably. Yes, and it is even more useful for improving the environment through sewerage works.

[Brief description of the drawings]

FIG. 1 is a front view of a water stopper device of the present invention,
2 is a right side view, FIG. 3 is a left side view, FIG. 4 is a sectional view showing an internal structure, and FIG. 5 is a description showing a method of inverting manholes using the water stopper device of the present invention. FIG. 1 ... water stopper device, 2 ... tube, 3
… Valve 4… Drain pipe 5… Cylindrical body 6… Manhole 7… Water pipe 7a… Upstream water pipe 7b… Downstream water pipe 8… Disc body 9 … Hollow plate, 10 Air vent 11 Rubber hose

Claims (2)

(57) [Claims] 1. A tube capable of swelling by injecting air into an outer peripheral portion of a cylindrical body through which a drain pipe provided with a valve is inserted to make close contact with an inner periphery of the water pipe so that the water pipe can be freely closed. Attached, and on the side surface of the cylindrical body with the tube attached to the outer periphery in the water pipe upstream direction,
A through hole is formed through which water is required, and a plate having a larger diameter than the outer diameter of the cylindrical body is connected. At the outer circumferential end of the cylindrical body in the downstream direction of the water pipe, the outer circumference has the same diameter as the plate. A hollow plate body to be connected is formed, a flange portion for supporting a tube is formed by the two plate bodies, and an air hole for the tube penetrates the cylindrical body and is exposed on the inner surface of the cylindrical body, and A water stopper device for a water pipe, wherein a connection pipe such as a rubber hose can be connected to the drain pipe according to the length of the bypass passage. 2. In the inverting operation of a manhole, first, air is fed into an outer peripheral portion of a cylindrical body formed by inserting a drain pipe provided with a valve into a water passage pipe on the upstream side of the manhole. A tube capable of tightly contacting the circumference and capable of freely closing the water pipe is mounted, and a through-hole for water flow is formed on a side surface of the cylindrical body having the tube mounted on the outer circumference in the upstream direction of the water pipe. Along with connecting a plate having a diameter larger than the outer diameter of the cylindrical body, a hollow plate having the same outer diameter as the plate is connected to the outer peripheral end of the cylindrical body in the downstream direction of the water pipe. The two plates form a flange portion for supporting the tube, and the air hole for the tube penetrates through the tube and is exposed on the inner surface of the tube. Depending on the type of rubber hose, etc. Attach a water stopper device to which a connecting pipe can be connected, pass a drain pipe or a connecting pipe such as a rubber hose connected to the drain pipe through the bottom of the manhole and through the downstream water pipe, and put air into the water stopper pipe. The valve is opened after the upstream water pipe is closed, the valve is opened, and the water is drained directly to the downstream water pipe without draining inside the manhole. A method of inverting a manhole, comprising performing an inverting operation, and after ending the operation, bleeding air from a tube of the water stopper device and removing the water stopper device from an upstream water pipe.