JPH09138123A - Pipe-inserted ultrasonic-wave probing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compact a device and improve measuring efficiency. SOLUTION: On a rod body 7, which has a core aligning wool brush 1 and can advance along the central axial line of a pipe P, a probe 2, which transmits and receives ultrasonic waves S in parallel with the rod body 7, and a conical reflecting member 6, which directs the ultrasonic waves S from the probe 2 toward the pipe wall at a right angle, are mounted. Thus, the ultrasonic waves are irradiated at one time over the entire surface of the inner wall of the pipe P even without a motor and rotating parts required in a conventional device, and the high-speed measurement of the pipe thickness can be securely performed. Since a conventional slip ring is not required, the generation of noises is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe insertion type ultrasonic probe device suitable for measuring the pipe thickness of a boiler heat exchanger.

[0002]

2. Description of the Related Art As a conventional tube-insertion type ultrasonic probe device, there is one shown in FIG.
The ultrasonic probe 2, the rotary holder 3, the slip ring 4, and the motor 5 are configured to be mounted on the strip 7. By rotating the rotary holder 3 with the motor 5 and moving the entire apparatus, the pipe thickness is measured over the entire circumference of the pipe, and signals are transferred by the slip ring 4.

[0003]

By the way, the conventional pipe-insertion type ultrasonic probe as described above has the following problems. (1) Since the scale on the inner surface of the pipe is caught in the bearing portion of the rotary holder 3, it takes a lot of time to remove the scale. (2) Due to the same reason, the motor 5 may become unusable, resulting in high cost. (3) Since the signal is transferred by the slip ring 4, noise is likely to occur. (4) Since it is a rotary type, it is easy for data to have missing teeth. (5) The measurement speed is slow. The present invention aims to solve such problems.

[0004]

In order to achieve the above-mentioned object, a tube insertion type ultrasonic probe according to the present invention has a centering bristle brush and is capable of advancing along the central axis of the tube. And an ultrasonic probe attached to the same body for transmitting and receiving ultrasonic waves, and a transducer of the probe is arranged so as to transmit ultrasonic waves in parallel with the above-mentioned body. At the same time, a reflecting member that reflects the ultrasonic wave transmitted from the vibrator in a direction perpendicular to the central axis of the pipe and directs it toward the wall of the pipe is provided so as to face the vibrator. Is characterized by.

As described above, when the ultrasonic waves transmitted from the diaphragm of the ultrasonic probe in parallel with the central axis of the tube are directed to the wall portion of the tube through the reflecting member, the sectional shape of the tube is formed. The thickness of the tube can be appropriately measured by selecting the shape of the reflecting member according to the above. Further, the pipe insertion type ultrasonic probe according to the present invention is characterized in that the vibrator is formed in a disc shape and the reflecting member is formed so as to have a conical reflecting surface. This makes it possible to radiate ultrasonic waves all over the circumference of the pipe all at once and measure the pipe thickness at a time, and it is possible to appropriately measure the pipe thickness particularly for a pipe having a circular cross section.

Furthermore, the pipe insertion type ultrasonic probe of the present invention is characterized in that the reflecting member is provided so as to be fixed to the ultrasonic probe. The reflected ultrasonic waves are accurately incident on the tube wall.

Further, the pipe insertion type ultrasonic probe according to the present invention is characterized in that the reflecting member is arranged in front of the ultrasonic probe with respect to the traveling direction of the ultrasonic probe. When the reflecting member is arranged in front of the ultrasonic probe in this way, the pipe thickness can be measured deep inside the end portion of the pipe.

Further, in the above-described tube insertion type ultrasonic probe of the present invention, since the slip ring in the conventional apparatus is not necessary, noise is reduced and the entire circumference of the tube can be measured at one time. Therefore, there is no omission of data.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A pipe-insertion type ultrasonic probe according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing its usage state, and FIG. FIG. 3 is an explanatory diagram showing a waveform measured by the above apparatus.

As shown in FIG. 1 and FIG. 2, the tube insertion type ultrasonic probe of this embodiment also has a centering bristle brush 1 for a cable that can travel along the central axis of the circular tube P. A strip body 7 and an ultrasonic probe 2 attached to the strip body 7 for transmitting and receiving ultrasonic waves are provided.

In this apparatus, in particular, the disk-shaped transducer 2a of the ultrasonic probe 2 is arranged so as to be capable of transmitting the ultrasonic wave S in parallel with the strip 7, and is transmitted from the same transducer 2a. A reflecting member 6 having a conical reflecting surface for reflecting the generated ultrasonic wave S in a direction perpendicular to the central axis of the pipe P and directing it toward the wall of the pipe P is provided so as to face the transducer 2a. There is. The reflecting member 6 is fixedly provided on the ultrasonic probe 2, and the positional relationship between the two is such that the reflecting member 6 is located in front of the ultrasonic probe 2 in the traveling direction of the ultrasonic probe 2. It is like this.

Since the pipe insertion type ultrasonic probe of the present invention is constructed as described above, the disc-shaped transducer 2a of the ultrasonic probe 2 is inserted through the conical reflection surface of the reflection member 6. Ultrasonic waves are simultaneously emitted over the entire circumference of the inner wall of the tube P, and the tube thickness can be measured at one time. 3A and 3B show waveforms measured by the present apparatus. FIG. 3A is a waveform diagram of a healthy portion of the pipe P, and FIG. 3B is a waveform diagram of a defective portion (thin portion) of the pipe P. In the present embodiment, the shape of the reflecting member 6 is formed in a conical shape, but the shape of the reflecting member can be appropriately selected according to the cross-sectional shape of the pipe, and thereby the pipe thickness is appropriately measured. be able to.

Further, by fixing the reflecting member 6 to the ultrasonic probe 2, the ultrasonic waves reflected from the reflecting member 6 can be accurately incident on the tube wall, and the ultrasonic probe 2 can be used.
By arranging it in front of the probe 2 with respect to the traveling direction of, the pipe thickness can be measured deep inside the end portion of the pipe P. As described above, according to the pipe insertion type ultrasonic probe of the present embodiment, the motor and the slip ring, which are required in the conventional device, become unnecessary, and the generation of noise and the like from the slip ring, the conventional It is possible to prevent the occurrence of the missing portion of the data, which has been a problem in the rotary type device. In addition, the entire device can be downsized to be applied to a small diameter pipe, and the measurement speed is increased, and since there are no rotating parts, maintenance is facilitated and inspection cost is reduced.

[0014]

As described in detail above, the following effects can be obtained with the pipe-insertion type ultrasonic probe according to the present invention. (1) Since the ultrasonic waves transmitted from the diaphragm of the ultrasonic probe parallel to the strip are directed to the wall of the tube through the reflecting member, the ultrasonic wave of the reflecting member can be changed according to the sectional shape of the tube. The pipe thickness can be appropriately measured by selecting the shape. (2) When the vibrator is formed in a disc shape, and the reflecting member is formed to have a conical reflecting surface, the ultrasonic waves are radiated simultaneously over the entire circumference in the tube, The pipe thickness can be measured at a time, and the pipe thickness can be appropriately measured especially for a pipe having a circular cross section. (3) When the reflecting member is arranged in front of the ultrasonic probe with respect to the traveling direction of the ultrasonic probe, the ultrasonic waves reflected from the reflecting member are accurately incident on the tube wall. . (4) When the reflecting member is arranged in front of the ultrasonic probe, the pipe thickness can be measured deep inside the end of the pipe. (5) The motor and slip ring, which were required in the conventional device, are no longer required, and the noise from the slip ring and the missing parts of the data, which was a problem in the conventional rotary device, are not generated. Will be prevented. (6) In addition to downsizing the entire device, it can be applied to small diameter pipes, the measurement speed is high, and because there are no rotating parts, maintenance is easy and inspection costs are reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a usage state of a pipe insertion type ultrasonic probe according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the apparatus shown in FIG.

3 shows a waveform measured by the device of FIG. 1, (a)
The figure is a waveform diagram of a healthy part of the pipe, and the diagram (b) is a waveform diagram of a defective part (thin wall part) of the pipe.

FIG. 4 is a side view of a conventional tube insertion type ultrasonic probe.

[Explanation of symbols]

 1 Alignment hair brush 2 Ultrasonic probe 2a Transducer 3 Rotating holder 4 Slip ring 5 Motor 6 Reflecting member 7 Article P tube S Ultrasonic wave

Claims (4)

[Claims] 1. A linear body having a centering bristle brush and capable of advancing along a central axis of a tube, and an ultrasonic probe mounted on the linear body for transmitting and receiving ultrasonic waves, The transducer's transducer is arranged so that it can emit ultrasonic waves parallel to the above-mentioned strip, and it also reflects the ultrasonic waves emitted from the transducer in a direction perpendicular to the central axis of the tube. A tube insertion type ultrasonic probe device, characterized in that a reflecting member is provided so as to face the wall of the tube so as to face the vibrator. 2. The ultrasonic probe according to claim 1, wherein the vibrator is formed in a disc shape and the reflecting member is formed to have a conical reflecting surface. A pipe insertion type ultrasonic probe device characterized by the above. 3. The ultrasonic probe device according to claim 1, wherein the reflecting member is provided so as to be fixed to the ultrasonic probe.
Pipe insertion type ultrasonic probe. 4. The ultrasonic probe according to claim 1, wherein the reflecting member is located in front of the ultrasonic probe with respect to the traveling direction of the ultrasonic probe. An ultrasonic probe device for insertion into a tube, characterized in that it is provided.