JPS5963542A - Method for testng airtightness of weld zone of repaired material - Google Patents

Abstract

PURPOSE:To inspect simply watertightness and airtightness of a repaired and reinforced place by providing an opening hole at the outside of a weld zone of a repaired material and charging highly pressurized fluid forcedly from this opening hole between the original material of the repaired material weld part and a repaired material, and checking the presence or absence of the pressure reduction of said fluid. CONSTITUTION:A opening hole is provided at the outside of a weld zone 2a of a welded repaired material 2, the highly pressurized fluid is charged forcibly from this opening hole between an original material 1 of the part 2a and the material 2 and the presence or absence of the pressure decrease of said fluid is checked. The pressurized fluid is charged forcibly by a manual pump 5 with fitting an adapter 4a to the opening hole. The presence or absence of the airtightness can be inspected by checking the presence or absence of the pressure reduction after standing the fluid for fixed hour by a pressure gauge 8 provided to the adapter 4b through a gauge pipe 7, with fitting the adapter 4b to the opening hole provided to the part 2a. If soap water is poured to circumference of the part 2a, the airtightness can be checked more simplly.

Description

[Detailed Description of the Invention] "Unexploded tsu" refers to leakage of water at repair and reinforcement points in ships under repair, etc. In ships under repair, etc., watertight areas such as the bottom shell, the ship's side shell, the walls of inboard tanks, or the bulkheads of cargo holds, etc. When repairing or reinforcing a steel plate, in addition to directly replacing the steel plate, the tabling method is often used, in which the hole (deteriorated part) is closed with a repair member ('doubler).

However, when repairing and reinforcing using the tabling method, the most important problem is conducting a tightness test. Until now, there was no established method for carrying out this 7＠ test, so it was difficult to carry out the pressure test on ships undergoing repairs, etc., and the large volume of water pressure required for partial repairs. Even one sword that has no choice but to perform a chiado,
A solution to this inconvenience is desired. In addition, although hose tests have been used as a substitute in such cases, hose tests do not allow sufficient confirmation of watertightness and tightness, and leakage accidents have also occurred at repaired areas below the water surface. There is.

The present invention aims to solve such inconveniences and provide a method for testing the airtightness of a welded part of a repaired member by which the watertightness and tightness of a repaired and reinforced part can be easily inspected. However, the hole in the old material was closed with a repair member, and the area between the periphery of the hole and the repair member and between the hole and the periphery of the repair member were welded to the outside of the welded part of the repair member. The method is characterized in that a hole is provided, and after press-fitting high-pressure fluid through the hole between the old material of the welded portion of the repair member and the repair member, it is checked whether or not the pressure of the press-fit fluid has decreased.

Hereinafter, the two density test method according to the present invention will be explained using the embodiments shown in the drawings.

1) When repairing and reinforcing by the doubler method, as shown in Figure 1, the hole (deteriorated area) Xa in the old material 1 is closed with a repair member (doubler) 2; Fillet welds 3a and 3b are used to weld between the periphery of the portion 18 and the reinforcing member 2 and between the perforated portion 1a and the periphery of the reinforcing member 2. In the method of the present invention, as shown in FIG. 2, an opening (F@, not shown) is provided on the outside of the welded part 2a of the welded repair member 2, and high-pressure fluid is supplied to the welded part 2a through this opening. The pressure fluid is press-fitted between the material 1 and the reinforcing member 2, and the presence or absence of pressure reduction of the pressurized fluid is checked. adapter 4a
The pressurized fluid is inserted into the hand pump 5 via a hose 6 that connects the hand pump 5 and the adapter 4a. Note that the pressurized fluid is not limited to a manual method such as the hand pump 5, but can also be press-fitted using other methods. It may be something that is done.

In addition, to check whether or not there is tightness, fit the adapter 4b into an opening (not shown) provided in the welded part 2a, and use a pressure gauge 8 provided on the adapter 4b via a gauge pipe 7.
This can be done by checking whether the pressure of the injected fluid has decreased after it has been left for a while, or by spraying soapy water around the periphery of the welded part 2a, it is easy to check the airtightness. can.

In addition, in FIG. 2, 9 is the pressure regulating pulp, 10 is the plug welding part, and hereafter, as explained in the embodiment shown in the drawings, the repair part welding according to the present invention is shown. According to the glue density test method, it can be easily used in confined spaces such as inside tanks or for off-shore repairs of repair ships, and its practical effects are extremely large.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view showing the repaired area using the doubling method.
FIG. 2 is an explanatory diagram of the method of the present invention. 1... Old issue 1a... Hole section 20, car, 1-piece member 2a... fist welding section 4a, 4b... adapter 511118 pump 8... head pressure gauge Patent applicant Mitsubishi Heavy Industries, Ltd. Patent attorney Mitsuishi Shibu (and 1 other person) Figure 1 Figure 2

Claims (1)

[Claims] The hole in the old edition was closed with a repair member, and an opening was made on the outside of the welded part of the repair member, which was welded between the periphery of the hole and the repair member and between the hole and the periphery of the repair member. A repair member welding part is provided, and after supplying high-pressure fluid through the opening between the old material and the repair member of the repair member welding part, it is checked whether or not there is a pressure decrease in the pressure-injected fluid. The 2C tenuto method.