KR100449924B1 - a self-control system of a stirrer error - Google Patents

Abstract

According to the present invention, in the stirrer which is widely used throughout the industry for the purpose of mixing, mixer, stirring, etc., the present invention finds the abnormality such as failure, overload, overheating, etc. that can occur in the stirrer earlier and appropriately. Diagnose the abnormality in real time so that the action can be made promptly, and if there is an abnormality, promptly notify the user (signal of alarm lamp, alarm sound, etc.) and diagnose the abnormality so that the user can take emergency measures (driving stop) by themselves. A stirrer with a magnetic control system.

That is, the rotation speed measurement sensor 16 is attached to one side of the speed reducer, the temperature sensor 14 is attached to the treated water and the driving motor 7, and the stirring object on the upper structure 30 of the upper part of the stirring vessel. And a pulsation (vibration) detection sensor 17 installed near the impeller of the stirrer 20 to oscillate the fluid pulsation and vibration of the reducer 8 when the impeller 13 rotates. To detect; Comprising a control panel (1) having a self-diagnostic control means (1a) for performing a notification (alarm lamp, alarm sound, etc.) for each abnormal state and operation stop after comparing the detected signal with the information of the normal operating state will be.

Description

Agitator with an anomaly diagnosis self control system {a self-control system of a stirrer error}

The present invention relates to a stirrer having a self-diagnosis system for abnormal diagnosis, and more particularly, to a stirrer which is widely used throughout the industry for the purpose of mixing, mixer, agitation, etc., the failure, overload, Diagnose abnormality in real time so that abnormality such as overheating is detected early and appropriate action can be promptly performed, and then promptly notify the user when there is an abnormality (signal of alarm lamp, alarm sound, etc.) And it relates to a stirrer self-diagnosis system for abnormal diagnosis that can perform emergency measures (driving stop) by themselves.

Usually, a stirrer is mainly used for mixing or stirring fine particles, liquids, etc., and at least one impeller whose structure is a portion of the stirrer blade which directly performs the agitation is provided at the end of the impeller shaft, and drives the impeller and the shaft to rotate. In order to reduce the speed and the driving motor, the control panel is provided for powering and controlling the rotational speed, direction, and the like of the driving motor.

Thus, the stirrer having such a configuration has many difficulties in performing the stirring because there are many cases where the failure of the constituent members is not only frequent due to other reasons during its operation, but also a small amount of damage is not found early in the failure.

As an example, the stirrer of the stirring vessel installed in water treatment plants, such as sewage, purified water, and wastewater, will be described.

The stirrer may perform a smooth water treatment process by being continuously rotated for a long time for the water treatment, and due to frequent failure, there are many difficulties in its fixed performance.

That is, when the stirrer rotates due to turbid flow, problems such as the rotating blades of the stirrer, that is, the impeller is broken or bent, and there is no other device that can check the abnormality early may cause an overload of the reducer and the driving motor. Only after it had been expanded to the extent that it had been realized, the enormous time and economic losses were inevitable.

Normally, it is hard to rule out that a failure occurs occasionally for other reasons, but if it is detected early and the action is taken quickly, the damage can be minimized. The countermeasure is urgently needed.

Therefore, in the present invention, in order to eliminate all the problems as described above, if there is an error through the self-diagnosis function after real-time detection of the abnormal operating state of the stirrer by performing an automatic alarm or automatic stop, start limit as an emergency measure It is a technical task that focuses on the early detection / action of internal defects such as cutting of impellers, blades and rotating shafts, which are essential components of agitators that cannot be identified.

1 is a cross-sectional view of the inside of the stirring vessel equipped with a stirrer showing a preferred embodiment of the present invention

2 is a configuration and schematic diagram of a self-diagnosis control means provided in the control panel of the present invention;

■ Explanation of the major symbols used in the main parts of the drawings ■

A: Stirring 1: Control panel

1a: Self-diagnosis control means 7: Drive motor

8: Gear Reducer 9: Drive Support

10: impeller shaft 12: impeller hub

13: Impeller Blade 14: RTD

15: water level sensor 16: rotation speed sensor

17: Pulsation detection sensor 20: Agitator

30: upper structure

When described in detail based on the accompanying drawings to achieve the above technical problem is as follows.

As shown in FIG. 1, the drive motor 7, the gear reducer 8, and the drive support 9 are integrally assembled to the upper structure 30, and the reducer output impeller is rearward of the drive support 9. In various stirring tanks (A) which process the agitator 20 to which the shaft 10, the impeller hub 12, and the impeller blade 13 are assembled, and the stirring object in which the said agitator 20 was installed (water treatment plant etc.),

The rotation speed measuring sensor 16 is attached to one side of the reducer 8 to measure the rotation speed of the internal rotating shaft, and the temperature sensor 14 is attached to the stirring object (treated water and the like) and the driving motor 7. Attaching to detect the kinematic viscosity of the stirring object (treated water, etc.) and the heat generation state of the motor (7), and the water level measuring sensor (15) of the stirring object on the upper structure 30 of the upper end of the stirring tank by mounting the water level of the stirring object Detect the volume and calculate the volume of the stirring tank A by calculating the width and length in the stirring tank A, and install a pulsation (vibration) detecting sensor 17 near the impeller of the agitator 20 to impeller ( Detecting fluid pulsation and vibration of the reducer 8 when 13) rotates;

Comprising a control panel (1) having a self-diagnostic control means (1a) for performing a notification (alarm lamp, alarm sound, etc.) for each abnormal state and operation stop after comparing the detected signal with the information of the normal operating state will be.

No. 2 is a speed indicator and setter, 3 is an abnormal status alarm lamp, 4 is a status indicator lamp, 5 is a pulsation (vibration) signal converter, 6 is a temperature signal converter, 11 is an object to be stirred 14-1, 15-1, 16-1, and 17-1 indicate the temperature measurement sensor 14, the water level measurement sensor 15, the rotation speed measurement sensor 16, and the pulsation (vibration) detection. Connection line for connecting the sensors 17 to the control panel 1, respectively.

The stirrer 20 having the abnormal diagnosis self-control system of the present invention configured as described above is switched to remote or automatic / manual by the field control panel 1 switch as shown in FIG. It is controlled by the speed of impeller suitable for the process at the speed. Even if the proper safety factor is applied at the time of design, if the stirrer 20 is operated continuously for a long time, it may sometimes be caused by defects in materials or problems in manufacturing and assembly processes. When the impeller shaft 10 is cut / broken or the assembly bolt between the impeller blade 13 and the hub 12 is loosened, the blade bleed 13 is detached one by one, or the gear or bearing of the gear reducer 8 is worn and broken. If such a failure occurs, the load of the driving unit is increased, which causes the driving motor 7 to accumulate overload, thereby increasing the current. When the current increases, heat is generated. If the overheat condition persists, the electric insulation strength of the motor internal winding is lost, resulting in burnout.

In particular, in the case of adjusting the speed of the motor 7 by the inverter, there is a case where heat generated by the loss of the ability to cool itself at low speed is accumulated and burned out.

The conventional overcurrent relay EOCR can detect the ideal overcurrent, but when the impeller shaft 10 breaks or the impeller blade 13 is disengaged from the hub 12, the current of the drive motor 7 is rather Since it is reduced, the overcurrent relay is not diagnosed, but the stirring function is lost, so there are cases in which the process is not processed, and in this case, the vibration of the reducer 8 becomes less or higher than during normal operation, and the motor 7 ) Winding temperature increases, and so on as shown in the following table.

-next -

Fault Process impact What happens Action Failure of Impeller Shaft Complete loss of agitation ㆍ Reduction of current compared to the set value Operation stop after alarm Break out of one blade Partial loss of agitation ㆍ Low speed operation:-Increase vibration-Reduce current,-High speed operation:-Reduce vibration-Increase current Alarm start up stop Two blades Partial loss of agitation ㆍ Low speed operation:-Increase vibration-Reduce current,-High speed operation:-Reduce vibration-Increase current Alarm start up stop Gear breakage of reducer Stirring is normal when the degree of breakage is slight ㆍ vibration and current increase Alarm start up stop Bearing breakage of reducer Stirring is normal when the degree of breakage is slight ㆍ vibration and current increase Alarm stop after start When the pulsating load is increased Normal until overcurrent relay is activated ㆍ Wind temperature rises as current increases Alarm stop after start When the surface of the stirred water is around the impeller No abnormal effect on the process in abnormal operation ㆍ The impeller oscillation is severe, which leads to excessive reduction in the reducer and shaft. Alarm stop after start

As shown in the table above, the phenomenon that appears depends on the fault content, so that various data ranges of the normal state of initial operation are grasped and based on the normal operation state, the actual running speed and motor (7) Load current, vibration, and winding temperature are measured continuously from each sensor, and then are compared and analyzed through the converter's A / D analog / digital converters via PLC (Programmable Logic Controller). The condition of the system can be grasped as much as possible, and compared with the normal operation state, it can be operated in addition to the alarm (indicator lamp and sound output, buzzer) when there is a light failure that needs to be checked, and the alarm that informs the failure condition in case of an emergency situation. It informs you at the early stage of abnormality, such as timely delivery, so that it can be prevented from spreading due to heavy failures and accidents that cannot be processed. An agitator (20) with self-diagnostic control system that can minimize.

As described in detail above, the stirrer 20 having the abnormal diagnosis magnetic control system of the present invention can automatically check the operating state of the stirrer 20 in real time, as well as detect it early when the mechanical defect occurs, and make an emergency by itself. Significant effects can be expected, including actions that can be taken.

In particular, in the case of the agitator 20 provided in the agitator tank of a water treatment plant for treating purified water, waste water, etc., the self-diagnosis of the operation state of the internal mechanism and the amount of water to be treated or the pulsation of the fluid is performed automatically. It is possible to take action on abnormality early by carrying out notification and emergency measures (stopping the system operation by emergency treatment with alarm lamp, alarm signal, etc.) and promptly and accurately notifying the user of the abnormality in real time. The invention is expected to be able to minimize the economic and time loss due to such a large number.

Claims (1)

The drive motor 7, the gear reducer 8, and the drive support 9 are integrally assembled to the upper structure 30, and the reducer output impeller shaft 10 and the impeller hub are rearwardly connected to the drive support 9. In the stirrer 20, in which the 12 and the impeller blades 13 are assembled, A rotation speed measurement sensor 16 is attached to one side of the speed reducer, and a temperature sensor 14 is attached to the stirring object and the driving motor 7 so that the kinematic viscosity and the motor of the stirring object are attached. Detects the exothermic state of (7), mounts the water level measurement sensor 15 of the stirring object on the upper structure 30 of the upper part of the stirring tank, detects the water level, and then calculates the width and length in the stirring tank A. To detect the volume of the agitator tank A, and install a pulsation (vibration) detection sensor 17 near the impeller of the agitator 20 so that the fluid pulsation and the decelerator 8 when the impeller 13 rotates. Detecting vibration; Comprising a control panel (1) having a self-diagnostic control means (1a) for performing a notification (alarm lamp, alarm sound, etc.) for each abnormal state and operation stop after comparing the detected signal with the information of the normal operating state Stirrer with an abnormal diagnosis magnetic control system, characterized in that.