JPH0336608Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a plug structure for sealing water pipes that seals the water pipes connected to apartments and other buildings under construction before faucets are installed. .

[Conventional technology]

The conventional plug structure for sealing water pipes is as follows:
For example, those shown in FIGS. 5 and 6 are known. Numeral 1 is a water pipe, and multiple pipes are installed in each room of the condominium under construction, and an elbow 2 is attached to the tip. And this elbow 2
is normally positioned and arranged in the faucet mounting hole 4 of the wall 3 of the apartment so that there is no gap. A plug 6 is attached to the elbow 2 for water sealing until the faucet of the water faucet 5 is finally attached. The plug 6 has a generally cylindrical shape with a bottom, has a threaded portion 8 on the bottom end 7 side, and a hexagonal wrench surface 10 on the base end 9 side. Then, the surface portion 10 is rotated using a wrench (not shown) so that the threaded portion 8 is screwed into the elbow 2.

[Problems with conventional technology]

However, with such a conventional plug structure for sealing water pipes, when a water pressure test is performed to check for water leaks in the water pipe 1, water is first introduced into the water pipe 1 to bleed air. This air can be removed by once removing the plug 6 from the elbow 2. For this reason, when the plug 6 was removed, a large amount of water gushed out from the elbow 2, causing a problem in that the vicinity of the faucet mounting hole 4 and even the floor surface were covered with water. Furthermore, after removing the air, the plug 6 had to be screwed into the elbow 2 again, and the threaded portion 8 of the plug 6 had to be wrapped with sealing tape, which was a hassle. and,
If the plug 6 is long with respect to the faucet mounting hole 4, the wrench surface 10 will be exposed to the outside, and this surface 10 may be damaged during construction, in which case it will be difficult to remove the plug 6 from the elbow 2. It was something like that. In addition, faucets 5 in apartments and other buildings usually have two types of diameters, large and small, and two types of plugs 6 with different diameters of threaded portions 8 are used accordingly. For this reason, there was a tendency for one or the other to be in short supply at work sites, which often required an emergency, and in such cases, the procurement could not be made in time.

[Means for solving problems]

Means for solving the above problems will be explained below using FIGS. 1 to 4 corresponding to the embodiment.

In this invention, as a plug structure for sealing water pipes, the plug 20 has a threaded portion 2 for the elbow 2.
1, and an inner plug 26 which is inserted into the inner cavity 23 of the outer plug 22 through an opening 25 on the proximal end 24 side and is screwed together and movable forward and backward.

This outer plug 22 has a bottom end 2
7, an air vent hole 28 penetrating toward the inner cavity 23 side, a valve hole 30 at the end 29 of the air vent hole 28 on the inner cavity 23 side, and a valve hole 30 from the valve hole 30 to the base end 2.
The internal threaded part 33 on the 4th side and the vertical wall 235 of the stepped part 234 on the proximal end 24 side from the internal threaded part 33 are provided with an internal hollow part 23.
A groove 236 for removing the outer plug 22 is formed so as to face the outer plug 22. Then the bottom of the tip 2
In order to correspond to the different inner diameters of the water pipes 1 to be water-sealed, specifically the elbows 2, the outer diameters of the threaded portions 21 of 7 are changed from the small diameter to the base end 24 side in order from the tip bottom 27 side to the base end 24 side. A first different-diameter threaded portion 337 and a second different-diameter threaded portion 338 are provided, each of which changes to a larger diameter.

The inner plug 26 is formed of a cylindrical valve body 260 and an inner plug body 50. The valve body 260 has its tip 46
A is provided with a tapered valve part 47, and one side of the valve part 47 is an inlet 51 that opens on the circumferential surface slightly closer to the proximal end 48a, and the other side is an inlet 51 that opens to the peripheral surface slightly closer to the proximal end 48a than the valve part 47.
The inner plug main body 50 is provided with a fitting hole 261 on the tip end 46b side, and this fitting hole 261 is connected to the outer diameter of the valve body 260. The base end 48a side of the valve body 260 can be freely fitted in a close state, and its depth is such that the inlet 51 of the valve body 260 is not hidden when fitted. It is said to belong to Further, the inner plug main body 50 has a connecting port 510b that opens at the bottom of the fitting hole 261 and communicates with the connecting port 510a of the valve body 260 on one side, and a base end 48b on the other side.
It is provided with a bypass passage 53b serving as an outlet port 52 opening on the side circumferential surface, and further provided with an external screw 49 that is screwed into the internal threaded portion 33 of the outer plug 22 at the tip 46b.

[Effect]

Next, the effect will be explained.

First, the plug 20 has first different diameter threaded portions 337 corresponding to different inner diameters depending on the elbow 2 to be sealed.
and a second different diameter threaded portion 338, 1
Depending on the size of the diameter of the elbow 2, the two plugs 20 can be used as either the first different diameter threaded part 337 or the second different diameter threaded part 33.
8 can be selectively used. For this reason, conventional 2
Instead of having to prepare different types of plugs, only one type of plug is required, which prevents one from running out during work. When attaching the plug 20 to the elbow 2 of the water pipe 1, a wrench (not shown) is applied to the surface portion 10 of the outer plug 22 to screw the threaded portion 21 into the elbow 2. When performing a water pressure test to check for water leaks in the water pipe 1, water is first introduced into the water pipe 1 and air within the water pipe 1 is vented.
This air is removed by rotating the groove 54 of the inner plug 26 with a screwdriver (not shown).
is moved slightly backward (to the right in FIG. 2), and the valve hole 30, which had been closed by the valve portion 47, is opened.
At the same time, the air is discharged to the outside through the air vent hole 28 → valve hole 30 → inlet 51 → connection port 510a → connection port 510b → outlet 52 → inner space 23. Then, when the air bleeding is finished and water starts to come out, the inner plug 26 is instantly rotated in the opposite direction to move the inner plug 26 forward (to the left in Figure 2), and the valve hole 30 in the "open" state is inserted into the valve section. Set it to "closed" at 47. Therefore, it is not necessary to once remove the plug 6 from the elbow 2 and bleed out the air during the water pressure test, as is the case in the past, and it is possible to prevent a large amount of water from flowing around the elbow 2, on the floor, and elsewhere. Also, the troublesome effort of reattaching the plug 6 to the elbow 2 using sealing tape can be saved.

Finally, close the main valve (not shown) of the water pipe 1 and attach the plug 2 to each elbow 2 to attach the faucet of the water faucet 5.
0 from the elbow 2, if the surface part 10 is damaged during construction and becomes unusable, remove the inner plug 26 from the outer plug 22 and insert the inner hollow part 23 into the groove 236 for removing the outer plug 22. By applying and rotating a tool (not shown) inserted inside, the outer plug 22 is inserted into the elbow 2.
This means that it can be removed more easily.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 4. Incidentally, the same parts as in the prior art are denoted by the same reference numerals, and redundant explanation will be omitted.

Reference numeral 20 denotes a plug for sealing water pipes, which has a generally cylindrical shape as a whole, and includes an outer plug 22 equipped with a threaded portion 21 for the elbow 2, and an outer plug 22 that is inserted into the inner cavity 23 of the outer plug 22 through an opening 25 on the proximal end 24 side. The inner plug 26 is screwed together and is movable forward and backward.

The outer plug 22 has an air vent hole 28 that penetrates toward the inner space 23 at approximately the center of the bottom end 27, and an end 29 of the air vent hole 28 on the inner space 23 side.
is the valve hole 30. An internal threaded portion 33 is formed by adding a step to the circumferential surface 32 of the inner cavity 23 on the proximal end 24 side of the valve hole 30 . Furthermore, a stepped portion 234 is formed closer to the proximal end 24 than the internal threaded portion 33.
A groove 236 for removing the outer plug 22 is provided in the vertical wall 235 facing the inner space 23 and facing the inner space 23 . In the illustrated example, the width of this groove 236 is one, but it is also possible to form a plurality of grooves 236 with appropriate widths. It is also possible to further form a plurality of stepped portions 234 toward the base end 24 and provide grooves 236 there. And further the tip bottom 2
7 includes a threaded part consisting of a first different diameter threaded part 337 and a second different diameter threaded part 338 each corresponding to an inner diameter that differs depending on each water pipe 1 to be sealed, specifically the elbow 2. There are 21. That is, the first different diameter threaded portion 337 has a small outer diameter to accommodate the small diameter elbow 2, and the second different diameter threaded portion 338 has the first different diameter to accommodate the large diameter elbow 2. The diameter is larger than the outer diameter of the threaded part 337, and the base end 24 is
A first different diameter threaded portion 337 and a second different diameter threaded portion 338 are arranged in this order toward the side.

The inner plug 26 is formed of a cylindrical valve body 260 and an inner plug body 60. The valve body 260 has a tapered valve part 47 at its distal end 46a, and one side thereof is an inlet 51 that opens on the circumferential side slightly closer to the proximal end 48a than the valve part 47, and the other side is the proximal end. 48a
The inner plug main body 50
is provided with a fitting hole 261 on the distal end 46b side, and this fitting hole 261 has an inner diameter approximately equal to the outer diameter of the valve body 260, so that the proximal end 48a side of the valve body 260 can be freely fitted in a tight state. The depth is such that the introduction port 51 of the valve body 260 is not hidden when the valve body 260 is fitted. In addition, one side of the inner plug body 50 opens at the bottom of the fitting hole 261 and forms a connection port 510b that communicates with the connection port 510a of the valve body 260, and the other side opens at the circumferential surface on the base end 48b side. It is provided with a bypass path 53b serving as an outlet 52, and further provided with an external screw 49 that is screwed into the internal threaded portion 33 of the outer plug 22 at the tip 46b. Furthermore, the inner plug 26
A slit-like groove 54 is provided in the base end 48b of the plug, and a tool (not shown) is used to adjust the threaded state of the outer plug 22 and the inner plug 26 so that the inner plug 26 can move forward and backward. . That is, the valve hole 30 of the outer plug 22 can be opened and closed by the valve portion 47. In addition, the inner plug 26 always connects the valve hole 30 of the outer plug 22 to the valve portion 4.
It is screwed to the outer plug 22 so as to close at 7.

Next, the operating state of the embodiment will be explained.

First, the plug 20 has first different diameter threaded portions 337 corresponding to different inner diameters depending on the elbow 2 to be sealed.
and a second different diameter threaded portion 338, 1
Depending on the size of the diameter of the elbow 2, the two plugs 20 can be used as either the first different diameter threaded part 337 or the second different diameter threaded part 33.
8 can be selectively used. For this reason, conventional 2
Instead of having to prepare different types of plugs, only one type of plug is required, which prevents one from running out during work. When attaching the plug 20 to the elbow 2 of the water pipe 1, a wrench (not shown) is applied to the surface 10 of the outer plug 22, and the first different diameter threaded part 337 to the second different diameter threaded part 338 of the outer plug 22 are attached to the elbow. 2. Selectively screw together according to the diameter of 2. At this time, it is more preferable to use a sealing tape in terms of water sealing effect. When performing a water pressure test to check for water leaks in the water pipe 1, water is first introduced into the water pipe 1 and air within the water pipe 1 is vented.
This air is removed by rotating the groove 54 of the inner plug 26 with a screwdriver (not shown).
is moved slightly backward (to the right in Fig. 2) and the valve hole 3 is
The valve portion 47, which was closed at 0, is now opened. At the same time, the air is discharged to the outside through the air vent hole 28 → valve hole 30 → inlet 51 → connection port 510a → connection port 510b → outlet 52 → inner space 23. When the air bleeding is finished and water begins to come out, the inner plug 26 is instantly rotated in the opposite direction to move the inner plug 26 forward (to the left in Figure 2) and open the valve hole 30 which is in the "open" state. The valve part 47 is set to "close". Therefore, it is not necessary to once remove the plug 6 from the elbow 2 to bleed air during a water pressure test, as is the case in the past, and it is possible to prevent a large amount of water from flowing around the elbow 2, on the floor, and elsewhere. Also, the troublesome effort of reattaching the plug 6 to the elbow 2 using sealing tape can be saved. And finally, water pipe 1
When removing the plug 20 from the elbow 2 in order to close the main valve (not shown) and attach the faucet of the water faucet 8 to each elbow 2, rotate the surface part 10 in the opposite direction with a wrench (not shown) and remove the plug 20 from the elbow 2. Remove it. In addition, when the surface part 10 is damaged during construction and becomes unusable, the inner plug 26 can be removed from the outer plug 22, and a tool (not shown) can be applied to the groove 236 for removing the outer plug 22 and rotated. This means that the outer plug 22 can be removed from the elbow 2. Finally, the water tap 5 is attached to the elbow 2.

〔effect〕

As explained above, the plug structure for sealing water pipes according to this invention is provided with a plurality of threaded portions of different diameters, each corresponding to a different inner diameter depending on the elbow to be sealed. With one plug, you can select either the first different diameter threaded part or the second different diameter threaded part depending on the diameter of the elbow. Since only one type is required, it is possible to prevent one type from running out during work. Furthermore, when testing the water pressure of water pipes, air is discharged from the valve hole through the inlet of the bypass passage and the outlet, and then the inner plug is instantly rotated to close the valve hole with the valve at its tip. This eliminates the need to remove the plug from the elbow and bleed the air when testing water pressure, which has the effect of preventing a large amount of water from flowing around the elbow or onto the floor. be. Furthermore, it is possible to eliminate the troublesome effort of reattaching the plug to the elbow using sealing tape, which also has the effect of improving work efficiency. Finally, when removing the plug from the elbow, if the surface of the outer plug is damaged during construction and becomes unusable, remove the inner plug from the outer plug, place a tool in the groove for removing the outer plug, and rotate. This also has the effect that the outer plug can be removed from the elbow.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of this invention with the outer plug and inner plug of a plug structure for sealing water pipes separated, Fig. 2 is an overall sectional view of the plug structure, and Fig. 3 Figure 4 is a side view of the plug structure viewed from the opening side, Figure 4 is a side view of the valve body of the inner plug and the inner plug body separated, Figure 5 is a faucet attached to the elbow of the water pipe. FIG. 6 is a perspective view showing an elbow and a conventional plug. 1,20...Plug, 2...Elbow, 8,21
...Threaded part, 22...Outer plug, 23...Inner space, 24...Proximal end, 25...Opening, 26...Inner plug, 7, 27...Tip bottom, 28...Air vent hole, 30...Valve hole, 33...Inner threaded part, 2
36...Groove for removing outer plug, 337...
...First different diameter threaded part, 338... Second different diameter threaded part,
47... Valve part, 49... External thread part, 50... Inner plug body, 51... Inlet, 52... Outlet, 53... Bypass path.

Claims (1)

[Claim for Utility Model Registration] A water pipe seal that seals water before installing a faucet by screwing the threaded part provided on the bottom side of the tip of a generally cylindrical plug with a bottom into the elbow of the water pipe. In the plug structure for water, the above-mentioned plug includes an outer plug that has a threaded portion for the elbow, and an inner plug that is inserted into the inner cavity of the outer plug from an opening on the proximal side and is screwed and movable back and forth. This outer plug consists of an air bleed hole that penetrates toward the inner cavity in the approximate center of the bottom of the tip, a valve hole at the end of the air bleed hole on the inner cavity side, and a valve hole that extends from the valve hole to the proximal end. and a groove for removing the outer plug formed in the vertical wall of the stepped portion on the proximal end side of the internal threaded portion, facing the inner cavity, and further provided with a seal in the threaded portion. In order to accommodate the different inner diameters of each water pipe, the inner The plug has a tapered valve portion at the tip, an external threaded portion provided on the proximal end side of the valve portion at a portion corresponding to the internal threaded portion of the outer plug, and an inlet that spans the inlet between the valve portion and the external threaded portion. A plug structure for sealing water in water pipes, characterized in that it has outlet ports on the proximal end side of the outer threaded portion, and a bypass passage passing through the inner plug body.