JP3285755B2 - Abnormality detection device for impact device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the detection of an abnormality in a hitting device.
Equipment, especially the hammering of the hammering pier of the electric dust collection system
This is useful when detecting an abnormal situation. [0002] 2. Description of the Related Art FIG. 5 shows an electric dust collecting apparatus according to the prior art.
FIG. 3 is an explanatory view conceptually showing a hammering bar structure. It is shown in the figure
The dust adhering to the discharge electrode 15 is
(Vibration) acceleration generated when the hammer 11 collides with
Shaken down by degree. The swing of the hammer 11 is next
It is carried out in the following manner. That is, the rotation of the motor 1
Transmission to transmission shaft 5 via gear 2, chain 3, and gear 4
Then, the rotation of the transmission shaft 5 is moved up and down by the crank 6.
It is converted into motion, hammering hammer 7, pulling rod 8, and slide
The metal fitting 9 is moved linearly in the vertical direction. Slide bracket 9 up
To the hammer shaft 19 via the slide fitting 10.
And the hammer 11 is swung up. Predetermined position
When the lifting rod 8 is lifted above the position, the slide fitting 9 is moved.
And the slide fitting 10 are separated, the hammer 11 falls and hammering
Collide with the tool 12. In FIG. 5, reference numeral 13 denotes a support insulator, 1
4 is a support jig, 15 is a discharge electrode, 16 isEnteringMouth duct, 1
7 is an EP chamber wall, and 18 is an outlet duct. [0004] The hammering pier of the electric dust collecting device as described above is used.
A conventional technique for monitoring an abnormality will be described with reference to FIG.
You. FIG. 6 is an extracted and enlarged part of FIG. same
As shown in the figure, the interior of the EP
Hot gas flows, and a high voltage is applied to the discharge electrode 15.
Worker cannot enter inside. Like this
Under the circumstances, the hammer 11 of the hammering device is set at a predetermined time interval.
Or hammering the hammering fixture 12 at a predetermined swing angle.
In order to confirm that
Put the ears on the other end, and hit the hammer 11 and hammer 1
The worker hears the vibration that occurs when
To determine the presence or absence of abnormalities. [0005] SUMMARY OF THE INVENTION However, as described above,
The following problems are associated with the hammering sound monitoring method according to the conventional technology.
There is. That is, the worker hammers by listening
Criteria for individual workers to determine whether there is an abnormality
Work that is not only uneven but also skilled in the work
Staff is needed. In view of the above prior art, the present invention has
Quantitatively grasping the physical quantity allows you to detect hammering
To provide a hitting abnormality detection device capable of detecting a normal condition.
With the goal. [0007] [MEANS FOR SOLVING THE PROBLEMS]
The configuration of Ming is characterized by the following points. [0008] [Means for Solving the Problems] 1) Via a power transmission system
Raise and lower the hammer by the transmitted power
RemoveOnce in one cycle of the power transmission system,Hit a given object
In the abnormality detection device of the impact device configured to perform
Detects vibration generated in the power transmission systemThe output that represents this vibration
Send force signalA first detecting means and a power transmission system;One round
Sends out a pulse signal synchronized with one blow per periodSecond
Detecting means;In the event of an abnormality, the signal is sent from the second detecting means.
From the first detecting means when the pulse signal is transmitted.
That the time delay until the output signal is
Use this to determine whether this time delay is constantThis
Signal processing means for detecting an abnormality of the hitting device.
When. 2) Hammer by power transmitted via power transmission system
Swing up and downOne cycle of the power transmission system
Times,Of a striking device configured to strike a predetermined object
Movement of the power transmission system in the abnormality detection deviceEvery time that move
Sends a pulse signal synchronized withSecond detecting means;
Power transmission system torque due to load acting on the power transmission system
changeAnd sends an output signal indicating this torque change.
ToThird detection means;In the event of an abnormality, the second detection means
From the time of transmission of the transmitted pulse signal, the third detection means
The time delay until the output signal is transmitted fluctuates
To determine whether this time delay is constant
Based onSignal processing means for detecting an abnormality of the hitting device.
To have. 3)The abnormality detection device for the impact device described in 1) above
And In the event of an abnormality, the signal processing means
In addition to the fluctuation, the level of the output signal of the first detecting means
The time delay is constant, taking advantage of the fact that the
The level is higher based on whether or not
The impact device is detected based on whether
That 4)The abnormality detection device of the impact device described in 2) above
And In the event of an abnormality, the signal processing means
In addition to the fluctuation, the level of the output signal of the third
The time delay is constant, taking advantage of the fact that the
The level is higher based on whether or not
The impact device is detected based on whether
That 5)Hammer by the power transmitted through the power transmission system
Swing up and down, one cycle in the power transmission system.
Times, a striking device configured to strike a predetermined object.
In the abnormality detection device, Detect vibration generated in the power transmission system
A first detecting means for outputting an output signal representing the vibration
Steps and A pulse synchronized with each movement of the power transmission system
Second detection means for transmitting a signal; Acts on the power transmission system
To detect changes in the power transmission system torque due to
Detecting means for transmitting an output signal representing a change in torque of the motor
When, In the event of an abnormality, the pulse sent from the second detection means
From the time of signal transmission, the signals transmitted by the first and third detection means are transmitted.
Time delay until each output signal is transmitted
And each of the first and third detecting means
Utilizing that each level of the output signal becomes higher,
Based on whether the time delay is constant or not,
Based on whether the bell is raised or not,
Signal processing means for detecting abnormalities; [0009] [0010] [0011] [0012] [0013] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
It will be described in detail based on FIG. FIG. 1 shows an embodiment of the present invention.
In the explanatory diagram conceptually shown with the hammering mechanism of the air dust collecting device
is there. 5, the same parts as those of FIG.
A duplicate description will be omitted. As shown in FIG. 1, detectors 21a and 21b
Is the aggregate of the ceiling that suspends the support insulator 13
Attached to the transmission shaft 5, respectively, hammer 11 and hammering fitting
12 collides with the slide fitting 9 and the slide fitting 10
This is a detector that detects vibrations that occur when
You. Detector22The pull-up bar 8 is raised and the slide bracket
9 and the slide fitting 10 maintain contact with the hammer shaft 19.
Is rotated and the hammer 11 is swung up, and as a result
When the applied torque increases and the hammer 11 is swung down
Is a torque detector that detects a decrease in torque.
You. The detector 23 detects a pulse synchronized with the rotation of the transmission shaft 5.
Detector. Each output of the detectors 21a, 21b, 22, 23
The force signals are supplied to dedicated amplifiers 24a, 24b, 25, 26, respectively.
After amplification by, for example, can be suitably configured with a personal computer
The signal is processed by the signal processing unit 27, and the result is
The output is provided to the linter 28. FIG. 2 shows signal processing in the signal processing section 27.
It is a flowchart which shows a procedure. As shown in the figure,
The vibration and torque fluctuation of the detectors 21a, 21b, 22 are shown.
The output signal is obtained by comparing the waveform with the rotation pulse signal of the detector 23.
And a time delay Δt with respect to the rotation pulse signal.₁, Δt_TwoSeeking
This time delay Δt₁, Δt_TwoWhether or not is constant
Detect (Step S_1,S_Two) Along with vibration and torque
Signal level ΔL₁, ΔL_TwoSet value R_ef1, R
_ef2Is detected (step S_3,S_Four). FIG. 3 shows a normal state (a) and an abnormal state (b).
Transmission shaft rotation pulse (rotation pulse signal of the detector 23),
Transmission shaft vibration waveform (output signals of detectors 21a and 21b) and
FIG. 4 is a waveform diagram of the torque and torque fluctuation (output signal of the detector 22)
You. If these figures are referred to, the time delay Δ
t₁, Δt_TwoAnd the signal level ΔL₁,
ΔL _TwoIs higher. Therefore,
Their time delay Δt₁, Δt _TwoAnd signal level ΔL₁,
ΔL_TwoAbnormalities can be detected by managing
You. Therefore, step S in FIG._FiveThen
Tep S_1,S_Two, S_3,S_FourIs different based on the processing result of
It is configured to detect normal possibilities. FIG. 4 shows a frequency analysis of the transmission shaft vibration waveform.
This is a characteristic diagram when a spectrum comparison is performed.
You. Referring to the figure, there is a normal time (solid line) and an abnormal time (point
Line) clearly shows a significant difference in spectral characteristics.
Is. Therefore, the normal reference data and real time
An abnormality can be detected by comparing the
Can be. Therefore, as shown in FIG.
R_ef1In the case of, step S₆At the frequency of vibration
An analysis is performed, and this is used as the reference data S₇And comparison determination unit S₈
To determine whether it is significant or not.
You. Step S₉Is Step S_FourAbnormality is detected by
And step S₈Results are "significantly different"
Abnormal S when_TenOtherwise, the message "Abnormal
Is not detected. " Step S₁₁Then step S
_FourAnd the signal level ≤ R_ef2Is detected,
S₈Is determined to have no significant difference, and step S₉so
When it is determined that "no abnormality is detected", it is determined to be normal. In this embodiment, the hammer 11 and the mallet
When the driving shaft 5 and the motor 1
The detectors 21a and 21b detect the vibration transmitted to the gantry.
And a detector 22 for detecting a torque fluctuation of the transmission shaft 5 is provided.
Transmission shaft generated when raising and lowering the lug 11
5 is detected. These vibrations and torque fluctuations
It fluctuates synchronously once per rotation of the transmission shaft 5.
You. In this embodiment, in order to measure the synchronization status,
The rotation pulse of the transmission shaft 5 is detected by the detector 23 and the rotation pulse is detected.
Between vibration and vibration, torque fluctuation and hammering
The presence or absence of vibration level and torque fluctuation level and hammering
The relationship between the presence and absence of abnormalities is grasped in advance, and the data and
The operator compares the data during the
The presence or absence of hammering can be determined without entering the room. In the above embodiment, the detector 22
Detects the torque of the transmission shaft 5, but this is
You may comprise so that the displacement amount of the dynamic shaft 5 may be detected. Required
Is the physical quantity due to the hammer 11 which is the load in this case.
It is only necessary to detect the torque and displacement of the power transmission system
No. For example, the same applies when the load torque of the motor 1 is detected.
The operation and effect of are obtained. In the above embodiment, the hammering mechanism is used.
, But the scope of application is limited to this.
is not. In general, it is a device that hits an object with a hammer
If applicable, it can be applied without restriction. [0026] The present invention will be described specifically with the above embodiments.
As described above, according to the present invention, the hammering device is normal.
Automatically and remotely can be determined remotely.
If it becomes clear, stop the equipment systematically and perform maintenance
Safety and high inspection cost
The width can be reduced. At this time, the individual criterion of the worker varies.
No sticking and no need for skilled workers
The operating status can be accurately grasped without safety, and safety is ensured.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view conceptually showing an embodiment of the present invention. FIG. 2 is a flowchart illustrating a processing procedure of a signal processing unit in FIG. 1; FIG. 3 is a waveform diagram of a transmission shaft rotation pulse, a transmission shaft vibration waveform, and a torque fluctuation in a normal state (a) and an abnormal state (b). FIG. 4 is a characteristic diagram showing frequency analysis characteristics of a transmission shaft vibration waveform. FIG. 5 is a diagram conceptually showing a conventional technique. FIG. 6 is an enlarged view showing a part of FIG. 5; [Description of Signs] 1 Motor 5 Transmission shaft 11 Hammer 12 Hammering tool 19 Hammer shafts 21a, 21b, 22, 23 Detector 27 Signal processing unit

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masamitsu Moto 5-2-4-1 Wadamiyadori, Hyogo-ku, Kobe-shi, Hyogo Dai-ni Ryoko Building Mitsubishi Heavy Industries Environmental Engineering Co., Ltd. (56) References JP2 −227152 (JP, A) Fully open sho 59-95269 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B03C 3/00-3/88 G01M 19/00

Claims (1)

(57) [Claim 1] The hammer is swung up and down by the power transmitted through the power transmission system to form one of the power transmission systems.
An abnormality detection device of a striking device configured to strike a predetermined object once per cycle detects vibration generated in a power transmission system and outputs the detected vibration.
First detection means for transmitting a force signal, and a pulse signal synchronized with one blow per cycle of the power transmission system
And a pulse signal sent from the second detecting means in the event of an abnormality.
Output signal sent from the first detecting means from the time of sending
Taking advantage of the fact that the time delay before sending
Signal processing means for detecting an abnormality of the impact device based on whether or not a time delay of the impact device is constant . 2. A hammer is swung up and down by power transmitted through a power transmission system, and the
An abnormality detection device for a striking device configured to strike a predetermined object once per cycle, wherein a pulse signal synchronized with the movement of the power transmission system is generated each time the power transmission system moves.
Sending a second detecting means for delivering, by detecting changes in torque of the power transmission system attributed to the load acting on the drive train output signal representative of the torque variation
And a pulse signal sent from the second detecting means in the event of an abnormality.
Output signal sent from the third detecting means from the time of sending
Taking advantage of the fact that the time delay before sending
Signal processing means for detecting an abnormality of the impact device based on whether or not a time delay of the impact device is constant . 3. An abnormality of the striking device according to [1].
In the detection device, the signal processing unit may change the time delay when an abnormality occurs.
In addition, the level of the output signal of the first detecting means is high.
Whether the time delay is constant
Whether the level is high in addition to
To detect an abnormality of the percussion device.
An abnormality detection device for a striking device. 4. An abnormality of the hitting device according to [2].
In the detection device, the signal processing unit may change the time delay when an abnormality occurs.
In addition, the level of the output signal of the third detecting means is high.
Whether the time delay is constant
Whether the level is high in addition to
To detect an abnormality of the percussion device.
An abnormality detection device for a striking device. 5. The power transmitted through a power transmission system.
Raise and lower the hammer to lower the power transmission system
A strike configured to strike a given object once per cycle
The abnormality detection device of the striker detects the vibration generated in the power transmission system and outputs
A first detecting means for transmitting a force signal, and a pulse signal synchronized with each movement of the power transmission system.
A second detecting means for transmitting the power, and a torque of the power transmission system caused by a load acting on the power transmission system.
Output of the torque change is detected.
And a pulse signal sent from the second detecting means in the event of an abnormality.
From the first and third detection means from the time of transmission of
Each time delay before sending each output signal fluctuates
And the respective outputs of the first and third detecting means.
By taking advantage of the fact that each level of the signal becomes higher,
Each level based on whether the delay is constant
Of the percussion device based on whether the
Characterized by having signal processing means for detecting
Abnormality detection device for shooting equipment.