JP2002090255A - Inspection apparatus for water leakage in newly installed water pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection apparatus by which the existence of a water leakage in a water pipe newly installed at a house or the like is inspected before the water pipe is connected to a public main water pipe, which eliminates a waste that a T-shaped pipe is interposed in, and inserted into, the newly installed water pipe in advance so as to be buried wastefully in conventional cases and by which the water leakage can be inspected at low costs and easily. SOLUTION: A straight pipe 2 is installed at the central connection port of the T-shaped pipe 1. A water pressure gage 4 is installed at the tip of the straight pipe. The straight pipe is connected to a pressure pump 8 via an on-off valve 6. The T-shaped pipe is interposed in the interval L between a water- source-side pipe 13 which is installed so as to attach a water meter 19 and a demand-side pipe 14. Connection ports at both ends of the T-shaped pipe are connected respectively to the water-source-side pipe and the demand-side pipe via diameter adaptors 10, 10. The on-off valve is opened, the pressure pump is operated, test water is pressure-fed into the demand-side pipe, the on-off valve is closed, and a change in the water pressure gage is monitored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting a water pipe in a house or the like for water leakage before connecting the water pipe to a public water main.

[0002]

2. Description of the Related Art For example, when connecting a new water pipe installed in a house to a public water main pipe, the water pipe must be inspected for water leakage. According to the conventional inspection method, a T-tube is inserted in advance at an appropriate place of a newly installed water pipe, a water pressure gauge and a feed water pressurizing pump are attached to a branch port, and test water is pumped into the water pipe. Then, the presence or absence of water leakage was determined by monitoring the fluctuation of the water pressure gauge.

In the water leak inspection device disclosed in Japanese Patent Application Laid-Open No. Hei 10-227713, the handle of a newly installed ordinary water tap is removed, a water pressure gauge and a feed water pressurizing pump are attached, and test water is pumped and sealed. And monitor the fluctuation of the water pressure gauge.

[0004]

However, in the above-mentioned conventional inspection method, there is not always a suitable place for inserting the T-tube, and the T-tube is buried and killed only for use in this inspection. Therefore, there is a problem that the piping cost is increased. In addition, the inspection apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 10-227713 also has a problem that there is not always a suitable water tap for inspection.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a water leak inspection device for a newly installed water pipe according to the present invention is provided with a straight pipe at a center connection port of a T-shaped pipe, and a tip of the straight pipe. A water pressure gauge is provided in the tank, and the straight pipe is connected to a pressurizing pump via an on-off valve. The T pipe is provided at an interval between a water source side pipe and a demand side pipe provided for mounting a water meter.
By connecting both ends of the T-shaped pipe to the water source side pipe and the demand side pipe via a diameter adapter, and opening the on-off valve and operating the pressurizing pump, the demand side pipe is connected. After the test water is pressure-fed, the on-off valve is closed to monitor the fluctuation of the water pressure gauge. Further, the present invention is characterized in that in the above-mentioned water leakage inspection device, an air vent is attached to the straight pipe.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing main components of a water leakage inspection apparatus according to the present invention, wherein 1 is a T-shaped pipe, 2 is a straight pipe connected by screwing a cap nut 3 to its central connection port, Reference numeral 4 denotes a water pressure gauge provided at the end of the straight pipe via a base member 5. Reference numeral 6 denotes an on-off valve provided in a branch on the base member 5 of the water pressure gauge. A pressurizing pump 8 (shown in FIG. 3) is connected to the end of the on-off valve via a hose 7. Reference numeral 9 denotes an air vent provided on the base member 5 on the side opposite to the on-off valve 6. Reference numerals 10 and 10 are diameter adapters formed so that the hexagon nuts 11 and 11 can be screwed into the connection ports at both ends of the T-tube 1.

Reference numeral 12 denotes a meter box buried on the road surface side of the site of a new house or the like.
3 and the demand-side pipe 14 are provided opposite to each other with a predetermined interval L for mounting a water meter. Reference numeral 15 denotes a water stopcock provided on the water source side pipe 13. Numerals 16 and 17 are cap nuts respectively provided at both ends of the pipes for connecting the water meters. The thicknesses of the pipes 13 and 14 are set respectively according to the size of the house and the demand for water.

In order to inspect the newly installed water supply pipe in a house or the like connected after the demand-side pipe 14 for water leakage with this apparatus, the connection ports 18, 18 of the diameter adapters 10, 10 are checked. Cap nuts 1 for pipes 13 and 14
6 and 17 are appropriately selected, and the hexagon nut portions 11 and 11 of the diameter adapters 10 and 10 are screwed into the connection ports at both ends of the T-tube 1. As shown, the T-tube 1 is interposed at the interval L by screwing the cap nuts 16 and 17 into the connection ports 18 and 18 of the diameter adapters 10 and 10, respectively. Then, the on-off valve 6 is opened, water is poured into the pressurizing pump 8, and by operating the handle of the pressurizing pump 8, test water is pressure-fed into the straight pipe 2 via the hose 7, and the demand side piping 14 Is filled with the test water, the air vent 9 is opened if necessary to release the air in the pipe, the water pressure in the pipe is increased, and the pointer of the water pressure gauge 4 becomes 17.5. When the pressure reaches about the atmospheric pressure, the on-off valve 6 is closed and closed. And after 2-3 hours, the water pressure gauge 4
And confirm that the water pressure in the piping has not dropped significantly. If there is water leakage from any of the pipes, the water pressure drops, so that the inspection can easily find the water leakage.

After the inspection is completed, the T-tube 1 is removed together with the diameter adapters 10 and 10, and a water meter 19 is attached to the interval L as shown in FIG. Water supply can be started.

If the thickness of the newly installed pipes 13 and 14 is larger than that of the above-described embodiment as illustrated in FIG. 5, the diameter of the connection ports 18 and 18 of the diameter adapters 10 and 10 is changed to the pipe diameter. This inspection apparatus can always be used only by selecting ones corresponding to 13 and 14 (selectable from several types because there are standards). Further, by providing the air vent plug 9 so as to allow the air remaining in the straight pipe 2 to escape, the presence or absence of water leakage can be inspected more accurately.

[0011]

As described above, the water leakage inspection device of the present invention
A straight pipe is provided at the center connection port of the T-shaped pipe, a water pressure gauge is provided at the tip of the straight pipe, and the straight pipe is connected to the pressurizing pump via an on-off valve, and a water meter is attached. The T-shaped pipe is interposed in the space between the water source side pipe and the demand side pipe provided for this purpose, and both ends of the T-shaped pipe are connected to the water source side pipe and the demand side pipe via a diameter adapter, respectively. After the test water is pumped into the demand side pipe by opening the on-off valve and operating the pressurizing pump, the on-off valve is closed to monitor the fluctuation of the water pressure gauge. There is no waste such as inserting a T-tube in advance and burying it.
There is a beneficial effect that allows easy inspection at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a water leakage inspection device for a newly installed water supply pipe showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state of use of the water leakage inspection device in FIG. 1; .

FIG. 3 is a side view of a newly-installed water pipe showing a use state of the water leakage inspection device in FIG. 1;

FIG. 4 is a perspective view of a water supply pipe after a water leak test.

FIG. 5 is a side view of a newly-installed water pipe showing a use state of the water leakage inspection device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 T-tube 2 Straight pipe 4 Water pressure gauge 6 On-off valve 8 Pressurizing pump 9 Air vent 10 Diameter adapter 12 Meter box 13 Water source side piping 14 Demand side piping 19 Water meter L Interval

Claims (2)

[Claims] 1. A straight pipe is provided at a center connection port of a T-shaped pipe, a water pressure gauge is provided at a tip of the straight pipe, and the straight pipe is connected to a pressurizing pump via an on-off valve. The T-shaped pipe is interposed between a water source side pipe and a demand side pipe provided for mounting a water meter, and both ends of the T-shaped pipe are connected to a water source side pipe and a demand side via a diameter adapter. The test water is pumped into the demand side pipe by connecting the pipe to the pipe and opening the on-off valve to operate the pressurizing pump, and then the on-off valve is closed to monitor the fluctuation of the water pressure gauge. Water leak inspection device for new water pipes. 2. The water leak inspection device for a newly installed water pipe according to claim 1, wherein an air vent is attached to the straight pipe.