JP2560431Y2 - Ultrasonic probe for water immersion - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic probe for local water immersion which is used for ultrasonic flaw detection of steel products and the like, and in which a vibrator portion is immersed in an ultrasonic medium such as water in a holder. It is.

[0002]

2. Description of the Related Art In ultrasonic flaw detection of steel products, since the directivity of ultrasonic waves in liquid is sharper, the lower part of an ultrasonic vibrator is immersed in water filled in a holder, and ultrasonic waves are passed through water. An ultrasonic probe for local water immersion that feeds water is used.

FIG. 5 shows an example of a conventional ultrasonic probe for local water immersion, in which a film 2 is attached to the bottom of a holder body 1 via a film fixing bottom ring 3 so that an ultrasonic wave can be obtained. Is formed at the center of the upper lid 4, an ultrasonic transducer (ultrasonic transducer) A is attached, and the air inside the holder main body is released to the outside on the upper side wall of the holder main body 1. An air vent (water blowing) hole 10 is provided.

The holder body 1 is filled with the water W, and the lower part of the ultrasonic vibrator A is immersed in the water W.
Ultrasonic waves are sent through the probe, and the probe is moved horizontally on the steel plate P to perform flaw detection.

[0005]

However, in the case of the conventional ultrasonic probe for local water immersion as described above, since the air vent hole 10 is formed in the upper side surface of the holder main body 1, the steel plate is flawed. In this case, there is a disadvantage that the water W in the holder main body 1 spills out of the air vent hole 10 due to the horizontal movement of the probe.

For this reason, it is necessary to supply water to the holder main body 1, and it is necessary to remove the upper lid 4 and supply water many times during the flaw detection work, and the flaw detection work is interrupted by a troublesome replenishment work. However, there are problems such as a decrease in work efficiency.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the invention is to make it difficult for water as an ultrasonic medium liquid in a holder main body to spill, and to reduce an ultrasonic medium in a holder main body. It is an object of the present invention to provide a water immersion ultrasonic probe capable of naturally supplying water to a space.

[0008]

According to this invention, an ultrasonic medium (eg, water) is filled in a holder body having an upper lid and a bottom plate made of a film or the like which transmits ultrasonic waves, and a lower portion of the ultrasonic vibrator is filled. In the ultrasonic probe for water immersion configured by immersing in the water in the holder main body, an air vent hole is provided in the upper lid, and the partition plate provided in the holder main body causes the lower ultrasonic wave in the holder main body. It is divided into a space for medium and a space for replenishment at the top, and has a double structure vertically. In addition, the partition plate has an ultrasonic vibrator fixed so that a lower portion thereof projects into the ultrasonic medium space, and a communication hole communicating the ultrasonic medium space and the replenishing space is provided. In addition, the space for supply is filled with water.

[0009]

In the above construction, even if the probe is moved horizontally during flaw detection, the air leakage hole is provided in the upper lid of the upper part of the holder body, so that the amount of water leakage from the upper part of the holder body is reduced. If the leak occurs, the water in the replenishing space is merely reduced, and the ultrasonic medium space is not affected at all. Furthermore, even if a small amount of water leaks from the bottom of the holder body or the like, water is naturally replenished from the replenishing space to the space for the ultrasonic medium through the communication hole, and the frequency of replenishing can be greatly reduced.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 1 is a schematic longitudinal sectional view of the ultrasonic probe for water immersion according to the present invention, and FIGS. 2 and 3 are a longitudinal sectional view in a disassembled state and a cross section taken along an arrow showing a specific example thereof. In addition,
Parts that are the same as or correspond to those in the related art are given the same reference numerals.

As shown in FIGS. 1 to 3, the ultrasonic probe for water immersion according to the present invention mainly comprises a holder body 1, a film 2, a film fixing bottom ring 3, a top cover 4, a partition plate 5, and a probe. It is composed of a contact-fixing cylinder 6.

As shown in FIG. 2 and FIG.
Is formed in a cylindrical shape, male threads are formed on the side surfaces of the upper end and the lower end, respectively, and an upper lid 4 is attached to an upper part and a film fixing bottom ring 3 is detachably screwed to a lower part. Film 2
Is a thin disk that closes the lower opening of the holder body 1,
The film fixing bottom ring 3 is attached to the lower end of the holder body 1 in a watertight manner. An opening window 3a is formed at the center of the film fixing bottom ring 3.

A partition plate 5 is horizontally provided on the upper part of the holder body 1 to form a double structure in the upper and lower parts. 8 is formed. An ultrasonic transducer (ultrasonic transducer) A is attached to the partition plate 5 via a probe fixing cylinder 6, and a communication hole 9 for communicating an ultrasonic medium space 7 with a supply space 8 is provided. Drill. Further, an air vent hole 10 is formed in the upper lid 4.

The probe fixing cylinder 6 has an upper large-diameter cylindrical portion 6a.
The ultrasonic transducer A is attached through the mounting hole of the large-diameter cylindrical portion 6a and the small-diameter cylindrical portion 6b, and the small-diameter cylindrical portion 6b is formed in the center of the partition plate 5. It is inserted into the mounting hole 11 provided.

The partition plate 5 and the small-diameter cylindrical portion 6b are provided with mounting holes 11
A plurality of screw through-holes 12 and screw mounting holes 13 are formed at intervals around the periphery of the large-diameter column, and the large-diameter cylindrical portion 6a is fixed to the partition plate 5 with screws (not shown).

For example, two communication holes 9 are arranged outside the screw through-holes 12, and the holes are smoothly narrowed downward, so that water can easily flow from the supply space 8 into the ultrasonic medium space 7. In addition, it is difficult to cause backflow in the opposite direction. The air vent hole 10 is provided at one location so as to be located outside the large-diameter cylindrical portion 6a. A hole 15 from which the connector 14 of the ultrasonic probe A can protrude is formed in the center of the upper lid 4.

In the above-described configuration, the upper lid 4 is removed, water W is put into the holder main body 1, water W is filled from the ultrasonic medium space 7 to the supply space 8, and the upper lid 4 is attached. In this state, flaw detection is performed by horizontally moving the probe.

Since the air vent hole 10 is located at the upper part, the amount of water leaking from the upper part of the holder body 1 during flaw detection can be reduced. The water in the ultrasonic medium space 7 does not decrease as it is, because the water in the space 8 is merely reduced and the ultrasonic medium space 7 in the lower part is not affected at all.

Further, even if water leaks from the bottom of the holder body 1 and the like, and the water in the ultrasonic medium space 7 decreases, the water in the replenishing buffer space 8 flows through the communication hole 9 into the ultrasonic medium space 7. And the frequency of water replenishment can be greatly reduced in combination with the aforementioned water leakage reduction.

Table 1 shows an example in which the flaw detection was actually performed, and the leakage amount per unit area and the flaw detection area per unit time were compared between the present invention, the conventional type (I) and the improved type (II).

As shown in FIG. 4, in the conventional type (I), an air vent hole 10 is provided on the upper side surface of the holder body 1 and an improved type.
(II) is a type provided on the upper lid 4.

[0022]

[Table 1]

In the conventional type (I), since the air vent hole is provided on the side surface, the probe is likely to leak due to horizontal movement of the probe during the flaw detection, and the frequency of water replenishment with the upper cover removed is increased. On the other hand, in the improved type (II), since it was provided on the upper part, the amount of water leakage was reduced, and the frequency of water supply was also reduced. In the present invention, a partition plate is added to the improved type (II) to form a double structure, so that the amount of water leakage from the ultrasonic medium space and the frequency of water supply can be further reduced, and the continuous flaw detection area can be greatly increased. Was completed.

It is needless to say that the continuous flaw detection area can be further increased by making the supply space 8 wider.

[0025]

As described above, the ultrasonic probe for water immersion according to the present invention has an air vent hole in the upper lid, and the holder main body has a double structure with a partition plate, and the ultrasonic medium space and the inside of the holder main body have the same structure. Because it was configured to form a space for replenishment,
The amount of leakage of the ultrasonic medium such as water from the holder body can be reduced, and water and the like can be naturally replenished to the ultrasonic medium space, and the frequency of replenishment of water and the like can be significantly reduced. Thereby, troublesome replenishment work of water and the like can be reduced, flaw detection work can be performed continuously without interruption, and work efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing an ultrasonic probe for water immersion according to the present invention.

FIG. 2 is a longitudinal sectional view showing an embodiment of the ultrasonic probe for water immersion in FIG. 1 in an exploded state.

3 is an arrow view and a cross-sectional view of each part in FIG. 2;

FIG. 4 is a schematic longitudinal sectional view showing a conventional type, an improved type, and the ultrasonic probe for water immersion of the present invention.

FIG. 5 is a schematic longitudinal sectional view showing a conventional ultrasonic probe for water immersion.

[Explanation of symbols]

 Reference Signs List A Ultrasonic transducer W Water 1 Holder body 2 Film 3 Film fixing bottom ring 4 Top lid 5 Partition plate 6 Probe fixing cylinder 6a Large-diameter cylindrical section 6b Small-diameter cylindrical section 7 Ultrasonic medium space 8 Supply space 9 Communication hole Reference Signs List 10 Air vent hole 11 Probe mounting hole 12 Screw through hole 13 Screw mounting hole 14 Connector 15 Connector hole

Claims (1)

(57) [Scope of request for utility model registration] An ultrasonic medium is filled in a holder body having an upper lid and a bottom plate that transmits ultrasonic waves, and water is formed by immersing a lower portion of the ultrasonic vibrator in the ultrasonic medium liquid in the holder body. In the ultrasonic probe for immersion, an air vent hole is provided in the upper lid, and the inside of the holder body is divided into a lower ultrasonic medium space and an upper supply space by a partition plate provided in the holder body, In the partition plate, while fixing the ultrasonic vibrator so that the lower part protrudes into the ultrasonic medium space, provided a communication hole that communicates the ultrasonic medium space and the supply space, the ultrasonic medium space and An ultrasonic probe for immersion in water, wherein the supply space is filled with an ultrasonic medium liquid.