JPH0658315U - Thickness reduction indicator - Google Patents

Abstract

(57) [Summary] [Purpose] When the wall thickness of a non-measured body is below a specified value, this is displayed near the measurement point so that the measurer can easily confirm the degree of decrease in the wall thickness. [Structure] The wall thickness reduction degree display device 10 includes a probe 14 and a marker 16. The probe 14 is housed and fixed in the first mounting hole 12a of the holder 12. The marker 16 is housed in the second mounting hole 12b of the holder 12 adjacent to the first mounting hole 12a. The marker 16 has a second mounting hole 12b.
A marker body 16a that moves inside, a permanent magnet 16b that is fixed to the marker body 16a, and a second mounting hole 12b.
And an electromagnet 16c fixed to the inside of the. Non-measurement body 2
When the wall thickness of 0 is less than or equal to the preset threshold value, the control current output to the electromagnet 16c is reversed to operate the marker 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wall thickness reduction degree display device for measuring a wall thickness using ultrasonic waves or the like and displaying the measurement point when the wall thickness is a predetermined value or less.

[0002]

[Prior art]

 In general, metal pipes used for gas pipes, etc. must regularly detect the erosion condition on the inner surface to prevent gas leaks and other accidents. The inner surface diagnosis of the metal pipe is designed to detect the wall thickness of the pipe, and is performed using, for example, an ultrasonic measuring device for a pipe disclosed in Japanese Utility Model Laid-Open No. 3-273106 (G01B 17/02).

That is, when the inner surface of the metal pipe is diagnosed, the inspection of the minimum wall thickness and the erosion state (the average distribution of the remaining wall thickness) are inspected. When manually operating a sensor such as an ultrasonic probe for this internal diagnosis, a mesh-like marking is made in advance on the outside of the pipe, and a number of these marked detection positions are measured sequentially.

[0004]

[Problems to be solved by the device]

 However, in such a conventional pipe inner surface diagnosis, the probe is applied to the marking point on the outside of the pipe as described above, and the wall thickness is measured. Displayed on the control panel placed away from the probe. Therefore, it is necessary for the measurer to visually check the measurement result by applying the probe to the marking point, and then moving the line of sight to the control panel while keeping the probe applied. is there. Therefore, it is necessary to move the line of sight back and forth many times in order to perform the inner surface diagnosis of each marking point, which complicates the measurement work. Therefore, if the marking is subdivided in order to improve the accuracy of measuring the wall thickness of the pipe, there is a problem that a great deal of labor and time are required.

In view of such conventional problems, the present invention displays the near-measurement point when the wall thickness of the non-measuring body is below a predetermined value, thereby easily measuring the degree of decrease in wall thickness. It is an object of the present invention to provide a wall thickness reduction degree display device that can be confirmed by a person.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, the first configuration of the present invention is a probe for detecting the wall thickness of a non-measuring body, and non-measuring when the wall thickness detected by this probe is below a predetermined value. A marker that marks the body and a holder that holds the probe and the marker in close proximity are provided.

In order to achieve such an object, the second configuration of the present invention is a probe for detecting the wall thickness of a non-measuring body, and the wall thickness detected by this probe is a predetermined value or less. Sometimes a marker that marks the non-measuring body, a holder that holds these probe and marker close to each other, and a warning sound that emits a warning sound when the thickness detected by the probe is below a specified value And a device.

[0008]

[Action]

 In the first configuration of the wall thickness reduction degree display device according to the present invention having the above configuration, the probe and the marker are held in close proximity to each other via the holder, and the measurement point of the non-measurement body is held. When the wall thickness is detected by applying a probe, if the wall thickness is equal to or less than a predetermined value, it is possible to mark the vicinity of the measurement point with a marker. Therefore, the measurer can confirm the degree of wall thickness reduction at the measurement point while visually observing the probe, and can more easily perform the wall thickness inspection of the non-measured body.

In addition, in the second configuration of the wall thickness reduction display device according to the present invention, in addition to the first configuration, when the wall thickness detected by the probe is less than or equal to a predetermined value. Since the warning device that emits a warning sound is provided, the degree of decrease in wall thickness can be confirmed by hearing, and the confirmation work of the degree of decrease in wall thickness can be performed more reliably and easily.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of an essential part showing one embodiment of a thickness reduction degree display device 10 according to the present invention.

That is, the thickness reduction degree display device 10 of the present embodiment is provided with the probe 14 and the marker 16 which are held in close proximity to each other via the holder 12 as shown in FIG. .

The probe 14 is housed and fixed in a first mounting hole 12 a opened at the lower end of the holder 12. The probe 14 has a built-in ultrasonic wave transmitter and receiver, receives the reflection of the ultrasonic wave transmitted from the transmitter by the receiver, and outputs this signal to the control panel 18, whereby the pipe 10 The wall thickness can be accurately detected by the control panel 18.

The marker 16 is housed in a second mounting hole 12b formed in the holder 12 adjacent to the first mounting hole 12a. The marker 16 is fixed to the marker body 16a movably accommodated in the second mounting hole 12b, the permanent magnet 16b fixed to the upper end of the marker body 16a, and the inner upper surface of the second mounting hole 12b. And an electromagnet 16c to be inserted.

The conversion of the magnetic pole of the electromagnet 16c is controlled by a control current output from the control board 18, and normally, the electromagnet 16c is set to a magnetic pole different from the upper magnetic pole of the permanent magnet 16b, and the marker main body 16a is moved upward. Attracted to. On the other hand, when the magnetic poles of the electromagnetic stone 16c are reversed, the repulsive force generated between the electromagnet 16c and the permanent magnet 16b pushes the marker body 16a downward to open the lower end of the second mounting hole 12b. The non-measurement body 20 is marked by projecting from the portion. In this embodiment, a carbon rod is used as the marker body 16a. The control board 18 inputs the detection signal of the probe 14 and judges the degree of decrease in the wall thickness of the non-measuring body 20 from this input signal, and this wall thickness is less than or equal to a preset threshold value. In this case, the control current output to the electromagnet 16c is inverted.

Further, the control panel 18 is provided with a buzzer 22 as a warning means for emitting a warning sound when the wall thickness is below a threshold value, and outputs a reverse current to the electromagnet 16c and at the same time. The buzzer 22 is set to ring.

In the wall thickness reduction degree display device of the present embodiment having the above-described configuration, when the probe 14 is applied to the measurement point P of the non-measuring body 20, the wall thickness is detected when the wall thickness is detected. When the thickness is equal to or less than the preset threshold value, the current output from the control panel 18 to the electromagnet 16c of the marker 16 is reversed to operate the marker 16 and mark the non-measurement body 20. At this time, since the probe 14 and the marker 16 are arranged close to each other, the mark can be attached in the vicinity of the measurement point P.

As described above, in this embodiment, when the wall thickness reduction degree at the measurement point P is equal to or larger than the predetermined value, the mark can be automatically provided in the vicinity of the measurement point P. It is possible to confirm the degree of wall thickness reduction at the measurement point P in the state where the tentacle 14 is visually observed. Therefore, it is not necessary for the measurer to alternately shift the line of sight to the probe and the control panel as in the conventional case, and the thickness inspection work of the non-measurement body 20 can be performed more easily and the time required for the inspection can be increased. Can be significantly reduced.

Further, in this embodiment, the control panel 18 is provided with a buzzer 22 to activate the marker 16 when the wall thickness is less than or equal to the stress value, and to make the buzzer 22 sound a warning sound. The degree of decrease in wall thickness can also be confirmed by hearing, and the work of confirming the degree of decrease in wall thickness can be performed instantly and more reliably and easily.

[0019]

[Effect of device]

 As described above, in the wall thickness reduction degree display device according to claim 1 of the present invention, when the wall thickness is less than or equal to a predetermined value in the proximity of the probe that detects the wall thickness of the non-measuring body, Since a marker for marking the measurement object is provided, the mark can be marked by this marker so that the measurer can confirm the degree of wall thickness reduction at the measurement point while visually observing the probe. it can. Therefore, it is not necessary to frequently move the line of sight during the thickness inspection, and the thickness inspection of the non-measured body can be performed more easily and accurately.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a warning device is provided which emits a warning sound when the wall thickness detected by the probe is equal to or less than a predetermined value. Therefore, the degree of reduction in wall thickness can be confirmed by hearing, and various excellent effects can be obtained such that the confirmation work can be performed quickly and surely.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a wall thickness reduction degree display device according to an embodiment of the present invention.

[Explanation of symbols]

 10 Thickness reduction display device 12 Holder 14 Probe 16 Marker 18 Control panel 20 Non-measuring body 22 Buzzer (warning device)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isao Sakado 4-33 Kitahama East, Chuo-ku, Osaka City, Osaka Prefecture Obayashi Corporation Main Store (72) Inventor Mitsuru Shimizu 2-3 Kandaji-cho, Chiyoda-ku, Tokyo Stock company Obayashi Corporation Tokyo head office (72) Inventor Shigezai Harada 2-3 Kandajimachi, Chiyoda-ku, Tokyo Stock company Obayashi Corporation Tokyo head office (72) Norimu Mukai 1-10 Higashi Sakura, Higashi-ku, Nagoya, Aichi Prefecture −19 Obayashi Nagoya Branch Office

Claims (2)

[Scope of utility model registration request] 1. A probe for detecting the wall thickness of a non-measuring body, a marker for marking the non-measuring body when the wall thickness detected by the probe is below a predetermined value, and these probes. A wall thickness reduction degree display device, comprising: a holder that holds the marker and the marker in close proximity to each other. 2. A probe for detecting the wall thickness of a non-measuring body, a marker for marking the non-measuring body when the wall thickness detected by the probe is below a predetermined value, and these probes. And a marker that holds the marker in close proximity to each other, and a warning device that emits a warning sound when the wall thickness detected by the probe is less than or equal to a predetermined value. apparatus.