JP3016324B2 - Drainer for pipes subject to hydraulic pressure test - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for draining a pipe to be subjected to a hydraulic test.

[0002]

2. Description of the Related Art When a casting pipe for water supply is manufactured in a foundry, it is not preferable that the pipe wall has a defect such as a pinhole or a crack. Is commonly done. At the time of this inspection, both ends of a horizontally supported pipe are closed with a face plate or the like, and then the pipe is filled with pressurized water to perform a water pressure test.
If the pipe wall is defective, water leaks from that part.

[0003] If the water leaks, the surface of the pipe gets wet. Therefore, the presence of a defect can be checked by visual observation or by observing the wetness with a water leak inspection device using an image processing technique.

[0004] Observation of this wetting is usually performed in a step after draining the water in the pipe. When draining the water in the pipe, it is common to remove a face plate closing both ends of the pipe and drain the water from the openings at both ends.

[0005]

However, when the amount of water in the pipe is reduced due to the progress of drainage and the power of the discharged water is weakened, as shown in FIG. Water 2 often flows in the water. As a result, specifically, there is a problem that the outer surface of the pipe 1 gets wet in a range of about 50 to 300 mm from the opening end, which causes an erroneous inspection in the above-mentioned water leakage inspection apparatus.

Accordingly, an object of the present invention is to solve such a problem and to prevent the transmission of water to the lower outer surface of the pipe at the time of drainage after the hydraulic pressure test.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for guiding water in a pipe flowing out from the inside of the pipe via the open end into contact with a lower end edge of the open end of the pipe after a hydraulic test. The guide member is provided.

[0008]

According to such a structure, especially when the drainage advances and the momentum of the water flowing out of the opening end of the pipe decreases, this water is guided by the guide member and guided downward. It is discharged outside the tube without flowing along the outer surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 denotes a centrifugally cast cast iron tube which is conveyed horizontally for processing after the casting operation. The tube 10 has a receiving port 12 at one end and an insertion port 14 at the other end. Numeral 16 denotes a hydraulic test position, which is provided with a hydraulic test device showing only the face plate 18. A drainage position 20 is provided at a position adjacent to the hydraulic test position 16. Reference numeral 22 denotes a carriage, which supports the pipe 10 in a horizontal direction, and moves the pipe 10 from a hydraulic test position 16 to a drain position 20.
It can be transported toward. Drainage position from hydraulic test position 16
Water receiving pans 24 for receiving drainage from the inside of the pipe 10 are provided at positions corresponding to both ends of the pipe 10 in the range over 20.

As shown in FIG. 2 and FIG.
Is a lifter 26 that raises and lowers the pipe 10 to a position corresponding to the hydraulic tester according to the diameter of the pipe 10, and a pair of pipes that independently support the receiving port 12 side and the insertion port 14 side of the pipe 10 so as to be able to raise and lower. Cradle
28 and 28. And, these pipe cradle 28, 28
As shown in FIG. 2, the pipe 10 can be supported in the horizontal direction at the hydraulic test position 16 as shown in FIG. 2, and at the drainage position 20 as shown in FIG. Thus, the pipe 10 can be supported in an inclined state.

As shown in FIG. 1 and FIGS. 3 to 5, a triangular plate-shaped guide member 30 is provided at the drain position 20. The guide member 30 is supported upright by a shaft 32 penetrating the guide member 30 in the horizontal direction, and is rotatable around the shaft 32. Shaft body 32 so that it is positioned at
Supported by This guide member 30 can contact the lower edge of the open end of the insertion opening 14 of the tube 10 as shown in the figure.

In such a configuration, the hydraulic test position 16
When the pipe 10 is carried into the pipe, the pipe 10 is
And pressurized water is supplied to the inside thereof to perform a predetermined hydraulic test.

When the water pressure test is completed, the inside of the pipe 10 is opened to the atmosphere to reduce the pressure, and the double-sided plate 18 is removed. It is discharged vigorously toward the bread 24. And at the same time tube 10
Is supported by the tube receiving pedestals 28, 28 of the transport trolley 22, and is moved toward the drain position 20 by the travel of the trolley 22.
Even during this movement, the drainage of the water in the pipe is continued vigorously toward the water receiving pan 24.

When reaching the draining position 20, the pipe 10 is slightly lowered by the transport trolley 22, and as shown in FIG. 4, the lower end edge of the opening end of the insertion opening 14 is a vertex 34 of the triangular guide member 30.
Is contacted near. Then, as shown in FIG.
The water 36 flowing out from the opening end of the insertion opening 14 flows downward through the guide member 30 and flows down into the water receiving pan 24.

[0015] As shown in FIG.
The port 12 of the tube 10 is lifted by 28, and the tube 10 is inclined so that the insertion port 14 side is lowered. Then, as shown in FIG. 5, the guide member 30 moves around the shaft 32 in accordance with the inclination of the pipe 10 while maintaining the state in which the vicinity of the vertex 34 is in contact with the opening end of the insertion opening 14 by its own weight. Slightly rotated.

By inclining the tube 10 in this manner,
The water remaining at the bottom of the pipe 10 effectively flows out through the open end of the insertion opening 14. Then, also at this time, as shown in FIG. 5, the discharged water 36 is transmitted through the guide member 30 and flows out into the water receiving pan 24.

By providing the guide member 30 in this manner, even when the amount of water in the pipe 10 is reduced due to the progress of drainage and the water force of the drainage water 36 is weakened, the drainage water 36 is reliably provided. Is guided by the guide member 30. Therefore, this wastewater 36
Does not flow along the lower outer surface of the open end of the tube 1, so that wetting can be reliably prevented from occurring at this portion.

When the water in the pipe 10 is drained, the pipe 10 is again horizontally supported by the pipe cradles 28, 28, carried out from the drainage position 20, and sent to a water leakage inspection device (not shown).

[0019]

As described above, according to the present invention, the guide member for contacting the lower end edge of the open end of the pipe after the hydraulic test and guiding the water in the pipe flowing out from the inside of the pipe via the open end downward is provided. In particular, in the case where the drainage proceeds and the momentum of the water flowing out from the opening end of the pipe decreases, the water can be guided by the guide member and guided downward, so that the water travels along the lower outer surface of the pipe. Flow to prevent the part from getting wet.

[Brief description of the drawings]

FIG. 1 is a plan view showing an installation state of a draining device for a pipe to be subjected to a hydraulic test according to an embodiment of the present invention.

FIG. 2 is a front view showing a state of a hydraulic test position in FIG. 1;

FIG. 3 is a front view showing a state of a drain position in FIG. 1;

FIG. 4 is an enlarged view showing a drainer according to one embodiment of the present invention.

FIG. 5 is a diagram for explaining the operation of the device of FIG. 4;

FIG. 6 is a cross-sectional view of a tube end for explaining a problem of the related art.

[Explanation of symbols]

 10 Pipe 20 Drainage position 28 Pipe cradle 30 Guide member

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-245510 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 3/00

Claims (1)

(57) [Claims] 1. A draining device for draining water from a pipe that has been subjected to a hydraulic test by filling the pipe with pressurized water after closing both ends of a horizontal pipe, and after the hydraulic test,
A draining device for a pipe to be subjected to a hydraulic test, comprising: a guide member that contacts the lower end edge of the open end of the pipe after the hydraulic test and guides water in the pipe flowing out of the pipe via the open end downward.