JPH0336800Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a water stop device. More specifically, the present invention relates to a water shutoff tool for waterworks, which is used when replacing a water supply pipe without interrupting the water supply.

[Prior Art] As a water shutoff device for waterworks, a water shutoff device consisting of a stopper and a Y-shaped pipe joint is conventionally known. In this case, the cut water supply pipe is stopped with a stopper, a new water supply pipe is connected to the branch pipe side via a Y-shaped pipe joint, and the stopper is connected to the main pipe side of the Y-shaped pipe joint. This allows the water to escape and connect the water supply pipes again.

On the other hand, a gate valve is known as a general pipe opening/closing means.

[Problems to be Solved by the Invention] In the water cutoff device using the above-mentioned stationary piece and Y-shaped pipe joint, when the diameter of the water supply pipe is large, the pipe does not form a straight line, and its range of use is limited. It is also possible to use a gate valve instead of the Y-shaped piping joint, but since gate valves cannot be operated quickly, when removing the stopper, first shut off the water on the downstream side with the stopper before closing the gate. The problem is that the water needs to be shut off with a valve, which requires a lot of work.

The object of the present invention is to provide a water shutoff tool for waterworks that allows piping to be carried in a straight line and can quickly shut off water.

[Means for Solving the Problems] The water stopper of the present invention includes a main body consisting of a straight main pipe and a branch pipe rising from the middle of the main pipe, and a main body that is inserted into the branch pipe and is movable in the axial direction. a stopper that is guided so as not to rotate, has a partition section below the main pipe for partitioning the flow of the main pipe, and has a tapered sealing surface that tapers upwardly above the stopper; A locking member fixed to the upper end and having a tapered surface that comes into close contact with the sealing surface of the plug; a fixing means that is detachably attached to the plug for fixing the plug to the lower end of the locking member; It comprises an operating means that can be attached to and detached from the stopper for operating in the axial direction, and is configured such that the partition is completely removed from the main conduit when fully opened.

[Function] Since the stopper is guided so that it can move freely in the axial direction within the branch pipe and does not rotate, the water in the main pipe can be stopped by simply pushing it down from the outside using a handle or other operating means. . Therefore, the water stop operation can be performed extremely quickly.

To establish communication within the main pipe, simply pull the plug upward using the operating means and press the sealing surface of the plug against the tapered surface of the locking member, allowing the main pipe to communicate and branch pipes to be sealed simultaneously. I can go there.

Thereafter, the stopper may be fixed to the upper end of the branch pipe using a fixing means.

[Example] Next, the water stopper of the present invention will be described with reference to the drawings.

Fig. 1 is a sectional view showing an embodiment of the water stopper of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a sectional view taken along the - line in Fig. 1. FIGS. 1 to 3 are partially cutaway exploded perspective views of the water stopper shown in FIGS. 1 to 3, and FIGS. 5 to 7 are sectional views sequentially showing how to use the water stopper of the present invention.

As shown in FIG. 1, the main body 1 is formed into a T-shape by a straight main pipe 2 and a branch pipe 3 rising from the middle of the main pipe 2. A stopper 4 is inserted into the branch pipe 3 so as to be movable in the vertical direction in the drawing. Branch pipe 3
A cylindrical locking member 5 is screwed onto the upper end of the
Above it, a cap 6 for holding the stopper 4 is shown together with a gasket 7, as will be described later.

As shown in FIGS. 2 and 4, the lower part of the stopper 4 is a partition portion 8 made of a substantially U-shaped flat plate.
A continuous projection 9 is formed around the partition portion 8 along the periphery thereof.

The protrusion 9 fits into a groove 10 (see FIG. 3) formed in a U-shape from the branch pipe 3 to the main pipe 2 of the main body 1, and when the handle 11 is screwed onto the male screw 12, the plug body 4 so as not to rotate, serves as a guide when moving in the vertical direction, and also ensures water stoppage of the main pipe 1.

A tapered portion 13 is provided above the partition portion 8 and has a truncated conical sealing surface that becomes thinner toward the top. The above-mentioned male screw 12 protrudes above the tapered portion 13.

A gasket 15 is interposed between the flange portion 14 of the locking member 5 and the upper end surface of the branch pipe 3, and the lower part of the inner surface of the locking member 5 is tightly fitted to the sealing surface of the tapered portion 13 of the stopper 4. A tapered surface 16 is formed to match. Note that the taper angles of the sealing surface of the plug body 4 and the tapered surface 16 of the locking member 5 are not particularly limited, but a Morse taper or the like may be adopted, for example.

Next, a method of using the water stopper configured as described above will be explained with reference to FIGS. 5 to 7.

First, as shown in FIG. 5, the water supply pipe 21 to which the water supply is not stopped is cut, and the placing piece 22 is quickly inserted to stop the water supply. Connect one end of the main pipe 2 of the main body 1 to the water supply pipe 21 while the water is stopped, braze it,
Seal the two by welding or gluing.

Then, as shown by the imaginary line in Figure 5, handle 1.
With the stopper 4 attached to the stopper 1 waiting in the branch pipe 3, the stopper 22 is quickly pulled out as shown in FIG. 6, and at the same time the stopper 4 is pressed downward. As a result, the water stopper of the present invention can shut off water with almost no water leakage. For lifting and lowering the plug body 4, use the male thread 12 of the plug body 4 at the tip as shown in Fig. 2.
A handle 11 with an internal thread that threads into the handle 11 is used, but is not limited thereto.

While the water is stopped, connect the new water supply pipe 23 to the other end of the main pipe 2 with a cap nut 24, as shown in FIG.
-Connect using a ring 25 or the like.

After the connection work is completed, the plug body 4 is quickly pulled upward so that the tapered portion 13 of the plug body 4 is firmly fitted into the tapered surface 16 of the locking member 5. Thereby, communication within the main pipe 1 is completed while preventing unnecessary water leakage from the branch pipe 3.

Finally, as shown in FIG. 7, the cap 6 is screwed onto the outer periphery of the male screw 12 protruding upward from the locking member 5, and the stopper 4 is fixed. As mentioned above, the packing 7 is interposed between the cap 6 and the upper surface of the flange portion 14 of the locking member 5, thereby ensuring a long-term seal and sealing the sealing surface and the tapered surface 1.
Prevent water leaking from between 6 and 6 to the outside.

The main body 1, plug body 4, locking member 5, cap 6
These can be molded from either metal or synthetic resin depending on the material and thickness of the water supply pipes 21 and 23 used.

Furthermore, the shape of the partition part of the stopper is not limited to a flat plate with parallel front and back surfaces as described above, but may also have a tapered surface that becomes thinner toward the bottom like the valve body of a gate valve. Alternatively, it may have a tapered surface in the shape of a truncated cone. Alternatively, the sealing surface of the partition or tapered portion of the stopper may be formed of a flexible thin stainless steel plate or the like, so that the sealing effect can be enhanced by deformation due to internal pressure.

[Effects of the invention] By using the water stopper of the invention, work such as replacing water supply pipes can be quickly completed, and the water supply pipes maintain a straight arrangement after the work is completed.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the water stopper of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a sectional view taken along the - line in Fig. 1. 1 to 3 are partially cutaway exploded perspective views of the water stopper shown in FIGS. 1 to 3, and FIGS. 5 to 7 are sectional views showing, in order, how to use the water stopper of the present invention. Main symbols in the drawing: 1: Main body, 2: Main pipe, 3: Branch pipe, 4: Plug body, 5: Locking member, 6: Cap, 1
1: Handle.

Claims (1)

[Claims for Utility Model Registration] A main body consisting of a straight main pipe and a branch pipe rising from the middle of the main pipe, and a main body that is inserted into the branch pipe and guided so as to be movable in the axial direction and not rotate. , a plug body having a partition portion below the partition portion for partitioning the flow of the main pipe, and a plug body having a tapered sealing surface that tapers upwardly above the partition portion, and a plug body fixed to the upper end of the branch pipe, a locking member having a tapered surface that comes into close contact with the sealing surface; a fixing means that is removably attached to the plug for fixing the plug to the lower end of the locking member; and a fixing means for operating the plug in the axial direction. A water stopper comprising an operating means that is detachably attached to a stopper body, and the partition portion is completely removed from the main pipe line when fully opened.