JP2024004886A - Hammering monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hammering monitoring system which can easily monitor the presence or absence of an abnormality of a hammering device.

SOLUTION: The present invention includes: a vibration detector 2 for detecting a vibration, arranged in a power transmission shaft bearing exposed to the outside of a member to which a vibration caused by hammering of a hammering device 100 propagates; and a monitoring computer 5 for remotely acquiring the result of detection by the vibration detector 2. If the hammering device 100 hammers at every specific hammering time, the vibration detector 2 is activated at every activation time, which is longer than the specific hammering time, and stops working after detecting for nearly the same length of detection time as the specific hammering time.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a hammering monitoring system for monitoring the presence or absence of an abnormality in a hammering device of a dust collector.

Electrical precipitators at power plants are equipped with a hammering device to knock off ash and dust adhering to the discharge electrode and the collecting electrode plate. However, if the crank or pulling rod of this hammering device breaks or breaks and hammering is no longer performed, the efficiency of collecting ash will decrease and the amount of soot and dust discharged from the chimney will increase. For this reason, conventionally, the hammering device has been inspected and patrolled by humans to monitor whether there is any abnormality in the hammering device. At this time, the sound emitted from the hammering devices is listened to to confirm whether there is any abnormality. However, when patrolling multiple hammering devices, it takes time and effort, so daily patrols are mainly done by visual inspection, and regular inspections are required. Because the system conducts focused patrols and listens to targets (once every three months, for example), there was a risk that abnormalities in the hammering device could not be discovered quickly in real time.

On the other hand, there is known a hitting abnormality detection device that can satisfactorily detect abnormalities in hammering by quantitatively understanding a predetermined physical quantity (for example, see Patent Document 1). This device processes the output signals of a detector that detects vibrations generated in the aggregate of the building and the transmission shaft, a detector that detects the torque of the transmission shaft, and a detector that detects the rotational phase of the transmission shaft. This is processed by the department (computer) and detects abnormalities in hammering.

Japanese Patent Application Publication No. 09-276740

However, the impact abnormality detection device described in Patent Document 1 not only has a complicated configuration because it includes various detectors and signal processing units, but also has a problem in that the hammering abnormality detection device is not only complicated in structure but also difficult to detect when the hammering is performed because the detector is disposed inside the hammering device. Equipment must be stopped. In addition, the hammering device performs hammering at predetermined time intervals, but the hitting abnormality detection device described in Patent Document 1 constantly detects vibrations, torque, etc. to monitor the presence or absence of abnormalities, which is inefficient. It is true.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a hammering monitoring system that can easily monitor whether or not there is an abnormality in a hammering device.

In order to solve the above problem, the invention according to claim 1 provides a hammering monitoring system for monitoring the presence or absence of an abnormality in a hammering device for knocking off ash in a dust collector, which includes vibrations caused by hammering of the hammering device. The present invention is characterized in that it includes a vibration detector that is disposed at a part exposed outside of the member through which the vibration is transmitted and detects the vibration, and a monitor that remotely acquires the detection result of the vibration detector.

The invention according to claim 2 is the hammering monitoring system according to claim 1, in which when the hammering device performs hammering at every predetermined hammering time, the vibration detector detects the hammering at each predetermined hammering time. The device is characterized in that it is activated at every activation time which is longer than the predetermined hammering time, and the detection is performed for a detection time that is approximately the same time as the predetermined hammering time, and then the activation is stopped.

According to a third aspect of the invention, in the hammering monitoring system according to the second aspect, when the monitoring device obtains a detection result in which the vibration cannot be detected by the vibration detector at the detection time, the monitoring device issues an alarm. It is characterized by outputting.

The invention according to claim 4 is the hammering monitoring system according to claims 1 to 3, characterized in that the monitor is capable of remotely acquiring detection results by the plurality of vibration detectors. .

According to the invention set forth in claim 1, when the vibration caused by the hammering of the hammering device is detected and monitored by the vibration detector, the detection result is remotely acquired by the monitoring device, so that a person can patrol the hammering device. It becomes possible to monitor whether or not there is an abnormality in the hammering device from a remote location without having to listen to the sound. In addition, since it only includes a vibration detector and a monitoring device, the configuration is simple, and the vibration detector can be installed at a part exposed outside the member to which vibrations caused by hammering are transmitted. There is no need to stop the striking device. In this way, it becomes possible to easily monitor whether or not there is an abnormality in the hammering device.

According to the invention as set forth in claim 2, the vibration detector is activated at every activation time longer than the hammering time during which the hammering device regularly performs hammering, and the vibration detector is not activated all the time. It is efficient and makes it possible to reduce startup power, etc. Furthermore, when the vibration detector is activated, the detection is performed for approximately the same time as the hammering time, so it is possible to reliably detect and monitor vibrations and to monitor whether or not there is an abnormality in the hammering device.

According to the invention set forth in claim 3, if the vibration detector cannot detect vibration during the detection time, an alarm is output from the monitor, so that abnormalities in the hammering device can be known at an early stage. This makes it possible to respond quickly.

According to the invention set forth in claim 4, since the detection results by the plurality of vibration detectors can be obtained remotely by the monitor, it is possible to remotely and centrally monitor the presence or absence of abnormality in the plurality of hammering devices. becomes.

1 is a schematic configuration diagram showing a hammering monitoring system according to an embodiment of the present invention. 2 is a diagram showing the arrangement position of a vibration detector of the hammering monitoring system of FIG. 1. FIG. 2 is a diagram showing activation timing of a vibration detector of the hammering monitoring system of FIG. 1. FIG.

The present invention will be described below based on the illustrated embodiments.

1 to 3 show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram showing a hammering monitoring system 1 according to this embodiment. This hammering monitoring system 1 is a system for monitoring whether there is an abnormality in the hammering device 100 of a dust collector in a power plant, and multiple (for example, 16) hammering devices 100 are concentrated in one place. It is now possible to monitor the situation.

Here, the hammering device 100 is a device that knocks off ash and dust attached to the discharge electrode or dust collection electrode plate of an electric precipitator, and has the same configuration as the existing hammering device that has been used conventionally. Although detailed explanation will be omitted, the general structure is as follows. That is, when the motor rotates, a transmission shaft rotates via a drive gear, a chain, and a driven gear, and a crank disposed on this transmission shaft moves up and down as the transmission shaft rotates. This vertical movement causes the pulling rod to move up and down, and the slide metal fitting placed at the tip of the lifting rod rotates the hammer shaft, causing the hammer to swing up and fall, striking the hammering metal fitting. .

As shown in FIG. 2, in such a hammering device 100, the surfaces (parts) of a casing 103 that covers the bearing 101 of the transmission shaft, the motor 102, the driving gear, the chain, the driven gear, etc. are exposed to the outside ( (can be contacted from the outside), and vibrations and sounds caused by hammering are transmitted to members such as the transmission shaft bearing 101 and the casing 103. Further, the hammering device 100 is configured to perform hammering regularly and continuously at every predetermined hammering time T1. That is, in this embodiment, hammering is performed by striking the hammering metal fitting with a hammer every 90 seconds, for example.

The hammering monitoring system 1 includes a vibration detector 2 disposed in each hammering device 100 and one monitoring computer (monitor) 5 disposed in the central control room of the power plant. The detector 2 and the monitoring computer 5 are communicably connected via a repeater 3 and a gateway 4. That is, the monitoring computer 5 can remotely acquire detection results from the plurality of vibration detectors 2, and can monitor the plurality of hammering devices 100 in the central control room. Here, the repeater 3 and the gateway 4 may be placed anywhere as long as they can communicate, but in this embodiment, the repeater 3 is placed near the entrance of the central control room, and the gateway 4 is placed near the entrance of the central control room. , located in the central control room.

The vibration detector 2 is a detector/sensor that is disposed at an exposed part of a member (a member of the hammering device 100) to which vibrations caused by hammering of the hammering device 100 are transmitted, and detects vibrations caused by hammering. , powered by a built-in battery. That is, in this embodiment, it is attached to the transmission shaft bearing 101 through which vibrations caused by hammering are transmitted and whose surface is exposed to the outside via a magnet, adhesive, or the like. The vibration detector 2 detects vibrations in order to determine whether hammering is being performed properly. Specifically, the vibrations detected include sound, acceleration, speed, etc. means. That is, it is possible to detect and determine whether or not hammering is being performed properly based on the detected acceleration value and the like.

Furthermore, in this embodiment, the vibration detector 2 itself determines whether hammering is being performed properly based on the detected acceleration value and the like. That is, as will be described later, the acceleration value etc. detected when the hammering is properly performed is input and set in advance as the determination threshold value, and when the detected acceleration value etc. is lower than this determination threshold value, It is determined that proper vibration could not be detected, that is, there is an abnormality in the hammering device 100. Then, the detection result as to whether or not proper vibration has been detected is transmitted to the monitoring computer 5.

As described above, in this embodiment, it is determined whether hammering is being performed properly based on the acceleration value etc. detected by the vibration detector 2 itself, but the monitoring computer 5 determines whether or not hammering is being performed properly. Good too. That is, the vibration detector 2 transmits the detected acceleration value, etc. as a detection result to the monitoring computer 5, and the monitoring computer 5 determines whether the acceleration value, etc. is equal to or greater than a determination threshold, that is, whether hammering is being performed properly. It may be determined whether or not.

Such a vibration detector 2 is activated and performs detection at the following timing. That is, as shown in FIG. 3, when the hammering device 100 performs hammering P every predetermined hammering time T1 (for example, 90 seconds), the activation time is longer than the predetermined hammering time T1. It starts every T2 (for example, 24 hours). Then, when activated, detection is continuously performed for a detection time T3 (for example, 90 seconds), which is approximately the same time as the predetermined hammering time T1, and then the activation is stopped. Thereafter, when the activation time T2 further elapses, the operation of starting up again, continuously performing detection for the detection time T3, and stopping the activation is repeated. Through such an operation, for example, the vibration detector 2 is activated once a day for 90 seconds (detection time T3), and if the hammering device 100 is normal, it will detect the vibration caused by the hammering P within 90 seconds. It is something. Here, the detection time T3 may be set slightly longer than the hammering time T1 so that vibrations caused by the hammering P can be detected reliably.

In addition, at the detection time T3, if any of the acceleration values etc. detected continuously (for example, every few seconds) is equal to or higher than the determination threshold value, proper vibration has been detected, that is, the hammering device 100 is normal. It is determined that Further, if any of the continuously detected acceleration values and the like are lower than the determination threshold value, it is determined that the hammering device 100 is abnormal. The frequency of continuous detection and the determination threshold are set so that the presence or absence of an abnormality in the hammering device 100 can be appropriately determined. In other words, based on the duration of vibration caused by hammering and temporal changes in the acceleration value after hammering, etc., obtained in advance through field surveys, there are cases where hammering is not performed normally, and cases where hammering is not performed normally. Detection frequencies and determination thresholds are set so that it can be determined whether the Here, the continuously detected acceleration values, etc. may be graphed so that it can be visually confirmed whether or not hammering is being performed normally.

The monitoring computer 5 is a computer that remotely acquires the detection results of each vibration detector 2. That is, a detection result indicating whether or not proper vibration was detected at the detection time T3 once a day is received from each vibration detector 2. Here, the monitoring computer 5 stores which vibration detector 2 is installed in which hammering device 100, and the detection result includes identification information of the vibration detector 2. Therefore, the monitoring computer 5 can determine from which vibration detector 2 the detection result is transmitted and to which hammering device 100 the detection result is transmitted.

Then, if a detection result in which the vibration detector 2 was unable to detect proper vibration at the detection time T3 is received/obtained, an alarm is output. At this time, alarm information including which hammering device 100 is abnormal is displayed on the display, an alarm sound is emitted, and the alarm information is transmitted to a preset administrator's mobile terminal or the like. Further, a warning lamp installed around the hammering device 100 may be turned on, or a warning sound may be emitted from a speaker to alert the operator.

As described above, according to this hammering monitoring system 1, when the vibration caused by hammering of the hammering device 100 is detected and monitored by the vibration detector 2, the detection result is remotely acquired by the monitoring computer 5. It becomes possible to monitor the presence or absence of an abnormality in the hammering device 100 from a remote location without a person patrolling the hammering device 100 and listening to the sound. In addition, since it only includes the vibration detector 2 and the monitoring computer 5, the configuration is simple, and the vibration detector 2 only needs to be placed in an exposed part of the member to which vibrations caused by hammering are transmitted. Therefore, there is no need to stop the hammering device 100. In this way, it is possible to easily monitor whether there is any abnormality in the hammering device 100.

In addition, since the vibration detector 2 is activated every startup time T2, which is longer than the hammering time T1 in which the hammering device 100 regularly performs hammering, and the vibration detector 2 is not activated all the time, it is efficient to start up. It becomes possible to reduce power consumption (battery consumption), etc. Moreover, since the vibration detector 2 detects for approximately the same time as the hammering time T1 (detection time T3) when activated, it is possible to reliably detect and monitor vibrations (acceleration values, etc.) to determine whether there is any abnormality in the hammering device 100. It becomes possible to monitor.

If proper vibration cannot be detected by the vibration detector 2 during the detection time T3, an alarm is output from the monitoring computer 5, so that the abnormality of the hammering device 100 can be known and disseminated at an early stage. It becomes possible to correspond to

Furthermore, since the detection results from the plurality of vibration detectors 2 can be obtained remotely by one monitoring computer 5, it is possible to remotely and intensively monitor the presence or absence of abnormalities in the plurality of hammering devices 100.

Although the embodiments of this invention have been described in detail above, the specific configuration is not limited to this embodiment, and even if there are changes in the design within the scope of the gist of this invention, Included in invention. For example, in the above embodiment, a case has been described in which the monitoring computer 5 as a monitoring device is installed in the central control room, but the monitoring device is configured with a cloud computer and the detection results of each vibration detector 2 are may be obtained from any location. In addition, the vibration detector 2 is disposed on the transmission shaft bearing 101, but the vibration detector 2 is located at a part exposed to the outside of the member to which vibrations caused by the hammering of the hammering device 100 are transmitted (a place where the vibration detector 2 can be attached from the outside). If so, it may be placed elsewhere, for example, on the surface of the casing 103.

1 Hammer monitoring system 2 Vibration detector 3 Repeater 4 Gateway 5 Monitoring computer (monitor)
100 Hammering device 101 Transmission shaft bearing 102 Motor 103 Casing T1 Hammering time T2 Start-up time T3 Detection time

Claims (4)

A hammering monitoring system for monitoring the presence or absence of an abnormality in a hammering device for knocking off ash from a dust collector,
a vibration detector for detecting the vibrations, which is disposed at a part exposed outside of the member to which the vibrations caused by the hammering of the hammering device are transmitted;
a monitoring device that remotely acquires detection results from the vibration detector;
A hammering monitoring system comprising: When the hammering device performs hammering at every predetermined hammering time, the vibration detector is activated at every activation time that is longer than the predetermined hammering time, performing the detection for approximately the same detection time as and then starting and stopping the detection;
The hammering monitoring system according to claim 1. The monitor outputs an alarm if a detection result indicating that the vibration was not detected by the vibration detector during the detection time is obtained.
3. The hammering monitoring system according to claim 2. The monitor is capable of remotely acquiring detection results from the plurality of vibration detectors,
The hammering monitoring system according to any one of claims 1 to 3.