JPH07926Y2 - Tapping device for lining diagnosis - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping device used for diagnosing deterioration of a lining provided on a chimney inner peripheral wall or the like.

[0002]

2. Description of the Related Art The inner peripheral wall of a chimney provided in various large plants is provided with a mortar lining to protect the inner peripheral wall. Mortar linings are also applied to the walls of various buildings.

Deterioration of these linings causes the lining to float from the wall body, causing cracking and peeling of the lining. Therefore, it has been conventionally inspected whether or not the lining is floating.

In this case, conventionally, an operator hits the wall surface with a hammer, and the hitting sound at that time is compared with the hitting sound in a sound state to detect the presence or absence of the lifting of the lining by intuition. .

[0005]

However, according to the above-mentioned method, there is a problem that the diagnosis of deterioration is likely to be subjective and the striking force is difficult to be uniform, so that a stable striking sound is difficult to obtain. , It took considerable skill to make a proper judgment.

Therefore, an object of this invention is to make it possible to make an objective diagnosis by mechanically tapping.

[0007]

In order to solve the above-mentioned problems, the present invention provides a support leg on the back surface of a substrate and swings a hammer arm hanging downward from the substrate on a fulcrum shaft provided on the substrate. A rotary plate is provided on the rotary shaft of the motor that is freely attached and installed on the substrate, a pin that engages with the tip of the arm over a range of a certain rotation angle is provided on the rotary plate, and a hammer head is provided on the handle integrated with the substrate. This is a structure in which a tap sound collecting microphone is attached.

[0008]

Function: The motor is driven while holding the handle and pressing the supporting leg of the substrate against the lining surface. Each time the rotary plate of the motor makes a half turn, the arm of the hammer disengages from the pin of the rotary plate, and the hammer swings and taps the lining surface.
The impact sound generated at that time is collected by a sound collection microphone and sent to the analysis device.

The operator changes the place to be tap-diagnosed while moving sequentially.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, the tapping device of the embodiment is provided with an upper support leg 2 and a lower support leg 3 made of rubber or the like on the back surface of a square substrate 1. The lower support leg 3 is formed to be taller than the upper support leg 2, so that when the support legs 2 and 3 are brought into contact with the surface of the lining 4, the substrate 1 follows the surface of the lining 4 with a certain inclination. Has become.

A motor 5 is fixed on the surface of the substrate 1.
A rotary plate 7 is attached to the drive shaft 6 of the motor 5, and two pins 8 and 9 are provided on the outer surface of the circuit plate 7 on both sides of the drive shaft 6.

A bearing base 10 is provided on the base plate 1, and an arm 13 of a hammer 12 is swingably supported by a fulcrum shaft 11 provided on the bearing base 10.

The hammer 12 is hung downward, and its upper end is along the outer surface of the rotary plate 7 and within the rotation locus of the pins 8 and 9, and each pin 8 is rotated during one rotation of the rotary plate 7.
It is adapted to be engaged with 9 only within a certain rotation angle range.

At the lower end of the hammer 12, the hammer head 1
4 is provided, and an acceleration pickup 15 is attached to the hammer head 14.

A handle 16 which is bent in a direction away from the lining 4 is attached to the lower end of the substrate 1.
A sound collecting microphone 17 facing the hammerhead 14 is attached to the lower end of the handle 16.

The tapping device of the embodiment is constructed as described above, and when using it, the gondola 1 is used as shown in FIG.
An operator A who rides on 8 holds the handle 16 and presses the support legs 2 and 3 of the substrate 1 against the surface of the lining 4, and the motor 5
Is energized and sequentially moved along the surface of the lining 4.

When the motor 5 is driven and the rotary plate 7 starts to rotate, first one pin 8 is moved to the arm 1 of the hammer 12.
3, the hammer 12 is lifted as shown by the one-dot chain line in FIG. When the pin 8 is disengaged from the arm 13, the hammer 12 swings to the opposite side due to its own weight, the hammer head 14 collides with the surface of the lining 4 (see the chain double-dashed line), and a striking sound is generated. When the rotary plate 7 is further rotated half a turn, the other pin 9 engages with the tip of the arm 13 of the hammer 12, and the impact sound is generated in the same manner as above.

After that, the impact sound is continuously generated in the same manner. The worker A sequentially moves the handle 16 to change the tapping position.

The hitting sound is collected by the sound collecting microphone 17, and waveform processing and data processing are performed in the analyzing device. Further, the acceleration data obtained by the acceleration pickup 15 is also sent to the analysis device and used as calculation data of the magnitude of the striking force.

[0020]

As described above, since the hammer is driven by the rotation of the motor in this invention, the hammering force and the hammering cycle of the hammer are constant, and the deterioration of the lining can be collected easily and objectively. can do.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a front view of the above.

FIG. 3 is a side view of the same use condition as above.

[Explanation of symbols]

 1 substrate 2 upper support leg 3 lower support leg 4 lining 5 motor 6 drive shaft 7 rotary plate 8, 9 pin 10 bearing stand 11 fulcrum shaft 12 hammer 13 arm 14 hammerhead 15 accelerometer 16 handle 17 sound pickup microphone 18 gondola

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taishi Abe 3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture 3-22, Kansai Electric Power Co., Inc. (56) Reference JP-A-2-62960 (JP, A) Actual Kai 63-73668 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A support leg is provided on a back surface of a substrate, a hammer arm hanging downward from the substrate is swingably attached to a fulcrum shaft provided on the substrate, and a rotary plate is attached to a rotary shaft of a motor installed on the substrate. A tapping device for lining diagnosis, wherein a pin that engages with a tip of the arm over a range of a certain rotation angle is provided on the rotary plate, and a tap sound collecting microphone of a hammer head is attached to a handle integrated with the substrate.