JPS6029663A - Ultrasonic probe device - Google Patents

Abstract

PURPOSE:To discharge easily air of the inside of a housing, and to fill the inside of the housing with defoamed water without mixing ambient air, by supplying water column forming flaw detecting water into the housing, and opening a valve by varying the pressure of water column forming flaw detecting water in the housing by a pressure varying device. CONSTITUTION:A housing 3 is connected in a state that a tank 7 filled with defoamed water, a pipe 8 having a pressure varying device 10 in which the pressure is set to P1 or above, an ultrasonic probe 2 and a rubber plate 5 are provided. In this case, the pressure of defoamed water 6 in the housing 3 is P1 or above, therefore, a valve 11 overcomes the pressing force of a spring 12 to open, air in the housing is discharged by the defoamed water, and the inside of the housing 3 is filled completely with the defoamed water. Also, in this case, the existence of air in a water column part can be confirmed easily by utilizing an ultrasonic wave. Thereafter, when the pressure is set to less than P1, the valve 11 is closed by the spring 12. Subsequently, water for forming a water screen is supplied from a pipe 9, and a flaw can be detected stably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic probe device that detects defects in a material to be inspected using ultrasonic waves. More specifically, the present invention proposes a probe device that easily and stably supplies and holds degassed water as flaw detection water for water column formation in a water column (local water immersion) type probe.

A conventional device of this kind is the one shown in FIG. In the same figure, (11 is the material to be tested, (2) is the ultrasonic probe fixed opposite to the material to be tested (1), (3) is the ultrasonic probe (2) fixed, and a housing for holding degassed water to form a water column; (4) a shoe that directly contacts the test material and keeps the ultrasonic probe +21 in a predetermined position relative to the test material (1); (5) is sandwiched and fixed between the housing (3) and the shoe (4), and +61 is a rubber plate (for example, a silicone rubber plate) that holds the defoamed water together with the housing (31) to form a water column. Defoamed water to form a water column (sword is defoamed water to form a water column (6
), (8) is a pipe that supplies degassed water (6) to form a water column from the tank (7) to the housing (3), and (9) is a pipe that supplies the test side (11 and the rubber plate ( This pipe is connected to the housing (3) in order to supply water through the housing (3) and the shoe (4) into the gap formed between the housing (3) and the shoe (4) to form a water film.

When performing flaw detection using the above ultrasonic probe device, first prepare degassed water in the tank (71).Connect the housing (3) and tank (7) with piping (8).At this time, the housing (3) There is air inside the housing that causes noise during ultrasonic flaw detection.While removing this air,
), either remove the rubber plate (5) and remove the ultrasonic probe (2), or attach the ultrasonic probe (2) and remove the rubber plate. (5), place the ultrasonic probe (21) or the rubber plate (5) on top (7) to remove the air, and fill the housing (3) with defoamed water. 2) or the rubber plate (5) respectively.In this way, degassed water (6) is obtained as the water column forming water column of the ultrasonic probe device, and the shoe (4) is used as the flaw detection water. After contacting the material (11), the flaw detection water for forming a water film supplied from the piping (9) fills the gap between the comb plate (5) and the material to be tested +11, allowing flaw detection to be performed.

The conventional ultrasonic probe device is constructed as described above, so after filling the housing (3) with degassed water, the ultrasonic probe (2) and rubber plate (5) are attached. At this time, there was a risk that surrounding air would enter through the gap created between the housing (3) and the ultrasonic probe (2+) or the rubber plate (5).

Talented. The work required to attach and detach the ultrasonic probe (2) and the rubber plate (5) was extremely complicated. In addition, since the ultrasonic probe (2) and rubber plate (5) are removed, the length of the 9 water column becomes unclear, and it is not easy to use ultrasonic waves to check for the presence of air while filling degassed water. Ta.

This invention was made to improve these drawbacks, and allows air to be removed from the housing without the need for complicated work such as removing or attaching the ultrasonic probe or rubber plate. It is possible to easily supply and hold degassed water to form a water column in the Ujifugu, there is no air contamination from the part where air is excluded, and the presence of air in the housing can be detected using ultrasonic waves. This provides an ultrasonic flaw detection device that can perform

An embodiment of the present invention shown in FIG. 2 will be described below. (1) to (9) are the same or equivalent parts as in Fig. 1, and 01 is between the pipe (9) and the housing (3).
A pressure variable device that varies the pressure of the degassed water (6) in the Ql
) is a valve that opens when the pressure inside the housing reaches a certain value (here, Pl) and closes when the pressure is less than .
1z is a spring that acts to close the valve (ill) at or below the pressure, i.e. when the pressure of the defoamed water in the housing is below this.

The force acting on the valve (1υ) is weaker than the force that the spring presses against the valve, and at P3 or higher, the force acting on the valve (11) is a spring. (7), piping with a pressure variable device set to a pressure higher than or equal to (8), an ultrasonic probe (
2) and the IT housing (3) with the rubber plate (5) attached.
) are concatenated. At this time, the defoamed water (
Since the pressure in 6) is greater than or equal to , valve 01) is operated by spring a
The pressing of z overcomes the force and opens the housing (3), and the inside of the housing (3) is completely filled with degassed water while the air inside the housing is removed by the degassed water. At this time, it is also possible to easily confirm the presence of air in the water column using ultrasonic waves. After that, when the pressure is reduced to less than 0 by the pressure nJ transformer 01, the valve 0υ is closed by the spring (15.At this time, the area around the valve Ql) is completely filled with defoamed water, so there is a risk that air may get mixed in. do not have. Next, piping (9)
Water for forming a water film is supplied, allowing stable flaw detection.

As above. In the ultrasonic probe device according to this invention, 9
By simply operating the pressure variable device, the air inside the housing can be easily removed and the degassed water can be filled into the Haulenge without mixing in the surrounding air. Moreover, it has the effect that the presence of air in the water column can be easily investigated using ultrasonic waves.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional ultrasonic probe device. FIG. 82 is a sectional view of an embodiment of the ultrasonic flaw detection device according to Jin's invention. In the figure, (1) is the test material, (2) is the ultrasonic probe, (3) is the housing, (4) is the seam, (51 is the rubber plate, (6) is the defoamed water, (7 is ; is a tank, (8) is a pipe that supplies degassed water, (9) is a pipe that supplies flaw detection water for forming a water film. fil is a pressure variable device, (lB is a valve,
tdl is a spring. In the drawings, the same or corresponding parts are designated by the same reference numerals. Agent Masuo Oiwa 1 to 1 Figure 2

Claims (1)

[Claims] A water column (local water immersion) type ultrasonic probe that inspects the material to be tested for defects, and a water column (local water immersion) type ultrasonic probe that inspects the material to be tested for defects, and a water column (local water immersion) type ultrasonic probe that is fixed and used for water column formation flaw detection A housing that stores water, a shoe that contacts the test material, a rubber plate that is sandwiched and fixed between the housing and the seam, and piping and a tank that supply the flaw detection water.
A gap between a pressure variable device located between the piping, a valve housed in the housing and configured to open and close based on the pressure within the housing that is changed by the pressure variable device, and the material to be tested and the rubber plate. and a pipe for supplying flaw detection water that forms a water film to the housing, the water column forming flaw detection water is supplied into the housing, and the pressure of the water column forming flaw detection water in the housing is changed by the pressure variable device. Even if the valve is opened by opening the valve, the air inside the housing is removed through the water channel obtained by opening the valve, the area around the valve in the housing is filled with flaw detection water, and the valve is closed by a pressure variable device. An ultrasonic probe device characterized in that a housing is filled with water column-forming flaw detection water without mixing air from around the valve.