JPH03219196A - Water stopper device for water pipe and manhole inverting work using the device - Google Patents

Abstract

PURPOSE:To directly discharge water from an upstream water pipe to a downstream water pipe, and enable performing a work at the bottom of a manhole i a condition free from water by inserting a valve equipped discharge pipe through an elastic plate body comprising an elastic material such as rubber. CONSTITUTION:A water stopper device 1 comprises an elastic material such as rubber, and a discharge pipe 3 equipped with a valve 3a is inserted through the center portion of a disc body 2 having a diameter slightly larger than the inner diameter of a water pipe 7. In performing an inverting work for a manhole 8, the water stopper device 1 is fitted to the upstream water pipe 9 of the manhole 8 for shutting out a water flow. A rubber hose 6 connected to the discharge pipe 3 is passed through the bottom of the manhole 8, and led into the downstream water pipe 10 of the manhole 8. Thereafter, the valve 3a is opened and water in the upstream side is directly discharged to the aforesaid pipe 10. According to the aforesaid construction, the inverting work can be done very easily with the bottom of the manhole 8 kept free from water.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water stopper device for water pipes that is mainly used for inverting manholes and is useful, and a method for inverting manholes using this water stopper device. Conventional technology] Conventionally, various construction work at the bottom of a manhole, namely,
So-called invert work, such as repair work and cleaning work, requires great effort and difficult work because sewage discharged from water pipes such as humid pipes flows at the bottom of the manhole. The dam was temporarily blocked by stacking mortar or sandbags, and urgently needed inversion work was carried out.

[Problem to be solved by the invention] However, invert work requires careful and quick work in a narrow, dark, and poor working environment, such as the bottom of a manhole. time is required.

However, conventional water flow stopping means are only temporary, and often lead to unexpected situations such as gradual seepage from the dam or collapse. Therefore, we have developed a water stopper device for water pipes that allows you to efficiently invert manholes in a suitable working environment without worrying about time or being disturbed by water at the bottom of the manhole. The emergence of a manhole inversion work method has been awaited.

[Means for Solving the Problems] The above-mentioned problems are solved by a water stopper device for a water pipe and a manhole inversion characterized by inserting a drainage pipe provided with a valve into an elastic plate made of an elastic material such as rubber. When working, first install the water pipe on the upstream side of the manhole.

When installing a water stopper device, which is made by inserting a drainage pipe equipped with a valve into an elastic plate made of an elastic material such as rubber, it closes the water pipe on the upstream side, and also closes the drainage pipe or a rubber hose connected to the drainage pipe. The connecting pipe is bypassed through the bottom of the manhole and passed through the water pipe on the downstream side, and then the valve of the drainage pipe is opened to allow the water flowing through the water pipe on the upstream side to be drained to the downstream side without draining into the inside of the manhole. A manhole characterized in that required inversion work is performed at the bottom of the manhole in a non-water flow state without water obstruction by directly discharging water into the water pipe, and after the work is completed, the water stopper device is removed from the water pipe on the upstream side. solved by the invert working method.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 in the figure is a water stopper device of the present invention, which is made of an elastic material such as rubber and is slightly thicker than the inner diameter of the water pipe, and a drain pipe 3 equipped with a valve 3a is inserted into the central part of the disc body 2. It consists of the form of

In the present invention having such a form, the second
As shown in the embodiment shown in the figure, there is an embodiment in which an annular recessed part 4 is formed on the outer circumferential portion of one side of the disc body 2 (the surface in the direction of pushing into the water pipe, which will be described later), and as shown in FIG. Two embodiments are prepared in which a protruding member 5 made of swingable and flexible rubber or the like is further provided protruding from the outer peripheral edge of the disc body 2 of the embodiment shown in FIG.

A flexible rubber hose 6 is connected to the drain pipe 4 depending on the length of the bypass passage. Of course, the drain pipe 4 may be formed to a required length in advance.

The usage state of the water stopper device 11 of the present invention having such a configuration will be explained based on FIG. 3.

First, the disc body 2, which is formed slightly thicker than the inner diameter of the water pipe 7, is pushed into the water pipe 7. In the first embodiment, the disc body 2 is made of an elastic material such as rubber. At the same time, due to the deformation effect of the outer circumferential portion of the disc body 2 in the outward direction (in the opposite direction of pushing) due to the action of the annular recessed part 4 described above, it can be easily and smoothly pushed into the water pipe 7, although it requires a certain amount of force. It will be done.

After the pushing is completed, due to the elastic return action, the deformed state of the outer periphery of the disc body 2 returns to its original state, and the outer periphery of the disc body 2 is crushed against the inner periphery of the water pipe 7 to increase the contact area, and the contact area is increased. 7
It firmly and tightly contacts the inner periphery and completely stops water flow in the upstream water pipe.

In the embodiment shown in FIG. 4, as shown in FIG. 5, the swingable protruding member 5 on the outer periphery of the disk body 2 serves as a guide, and furthermore, the layer is pushed in smoothly. , since this protruding member is easily crushed by the inner periphery of the water pipe 7 after being pushed in, -
A perfect tight contact state with the stage is obtained, and this second
The protruding member 5 on the outer periphery of the disc body 2 of the embodiment also exhibits the effect of adjusting the dimensional deviation caused by expansion and contraction of the disc body 2 during winter and particularly cold and hot summer times.

However, in the present invention, a rubber hose 6 is connected to the drain pipe 3, with one portion passing through a bypass at a required location.
The valve 3a of the drain pipe 3 is opened to allow water in the water pipe 7 to pass by bypass to a required location.

Of course, the rubber hose 6 may be connected to the drain pipe 3 in advance, and the rubber hose 6 may be bypassed to a required location, and the disc body 2 may be pushed into the water pipe 7 and fitted.

Next, a method for inverting a manhole using the water stopper device of the present invention will be explained based on FIG.

First, the water stopper device 1 having the above-described configuration is attached to the water pipe 9 on the upstream side of the manhole 8, and the water pipe 9 on the upstream side is closed.

Further, the drainage pipe 3 or a flexible connecting pipe such as a rubber hose 6 connected to the drainage pipe 3 is passed through the bottom of the manhole 8 and passed through the water pipe 10 on the downstream side.

Thereafter, by opening the valve 3a of the drain pipe 3, the water on the upstream side is bypassed through the drain pipe 3 or a connecting pipe such as a rubber hose 6 without draining into the bottom 8a of the manhole 8, and is then drained into the water pipe IO on the downstream side. Drain directly into the water.

Therefore, the bottom 8a of the manhole 8 is in a state where water does not flow, and one worker can carry out the required inversion work in a suitable environment without worrying about time.

After the work is completed, the water stopper device 1 can be quickly and easily removed from the water pipe 9 on the upstream side.

[Effects of the Invention] However, according to the present invention, even complex and difficult work such as conventional inverting work must be completed within an extremely limited time, and moreover, it is possible to avoid seepage of sewage, etc. It is completely different from working in a bad environment where there is a high risk of unexpected situations such as collapse, and it is possible to carry out work in a sufficient amount of time depending on the content of the work. Moreover, it has been devised so that it can easily maintain the required time perfectly, so it has good workability, and it is especially efficient for inverting manholes, which requires a lot of effort, complicated and difficult work during sewerage construction. Moreover, it can be carried out safely and reliably, and is further useful for improving environmental maintenance through sewerage construction.

[Brief explanation of drawings]

FIG. 1 is a front view of the water stopper device of the present invention;
2 is a sectional view of the water stopper device shown in FIG. 1, FIG. 3 is a sectional view showing the water stopper device shown in FIG. 2 in use, and FIG. 4 is another embodiment of the water stopper device of the present invention. A cross-sectional view showing an example, FIG.
FIG. 6 is a schematic sectional view showing a method of inverting a manhole using the water stopper device of the present invention.

Claims (5)

[Claims] (1) A water stopper device for a water pipe, characterized in that a drainage pipe equipped with a valve is inserted into an elastic plate made of an elastic material such as rubber. (2) A water stopper device for a water pipe, characterized in that a thin wall portion consisting of an annular recessed portion is formed on the pushing direction surface of the elastic plate. (3) A protruding member is installed on the outer periphery of the elastic plate, which is swingable and used for guiding when pushing in, reinforcing the tight contact with the inner periphery of the water cylinder, and for adjusting the degree of expansion and contraction of the elastic plate during cold and hot weather. A water stopper device for a water pipe, characterized in that: (4) A water stopper device for a water pipe, characterized in that a connecting pipe such as a rubber hose can be connected to the drain pipe depending on the length of the bypass passage. (5) When inverting a manhole, first install a water stopper device, which is made by inserting a drainage pipe made of an elastic plate made of an elastic material such as rubber and equipped with a valve, into the water pipe on the upstream side of the manhole. At the same time, close the drain pipe or a connecting pipe such as a rubber hose connected to the drain pipe, bypass the bottom of the manhole and pass it through the downstream water pipe, then open the valve of the drain pipe and close the drain pipe to the upstream side. By directly discharging the water flowing through the water pipe into the downstream water pipe without draining it inside the manhole, the necessary invert work can be performed at the bottom of the manhole without any water obstruction. A manhole inversion work method characterized by removing the water stopper device from the upstream water pipe after completion.