CN112098837A - Failure alarm method and device for shaftless screw conveyor - Google Patents
Failure alarm method and device for shaftless screw conveyor Download PDFInfo
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- CN112098837A CN112098837A CN202010850196.9A CN202010850196A CN112098837A CN 112098837 A CN112098837 A CN 112098837A CN 202010850196 A CN202010850196 A CN 202010850196A CN 112098837 A CN112098837 A CN 112098837A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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Abstract
The invention discloses a method and a device for alarming faults of a shaftless screw conveyor. The method comprises the following steps: acquiring the current value range of a driving motor of the shaftless screw conveyor in the no-load working state of the shaftless screw conveyor; detecting the real-time current value of the driving motor; when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a normal working state, and not sending out an alarm prompt; when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt; the invention realizes the monitoring of the shaftless screw conveyor by monitoring the current of the driving motor, and gives an alarm when the working state of the shaftless screw conveyor is abnormal, thereby improving the alarm accuracy.
Description
Technical Field
The invention belongs to the field of monitoring of driving motors, and particularly relates to a method and a device for alarming faults of a shaftless screw conveyor.
Background
In the daily operation process of a regeneration water plant, a spiral fault often occurs, and the machine is shut down. The failure phenomena mainly include: damage to the liner, breakage of the screw conveyor, failure of the moderator, failure of the drive motor, etc. If the sludge is found out untimely, a large amount of sludge can be accumulated, so that the cleaning is difficult, and the maintenance time and space are seriously influenced due to the accumulation of a large amount of sludge.
The alarm signal of a general driving motor is mainly used for acquiring the running state of a speed reducer of the driving motor so as to judge whether the screw conveyor fails or not. However, the method has the defect that when the screw conveyor works, the connection between the screw conveyor and the driving motor is broken, the driving motor speed reducer can still normally run, so that no fault alarm is generated, the sludge is conveyed to be accumulated, and the production safety is seriously threatened.
In addition, a limit sensor is additionally arranged in the groove body of the spiral conveyor, but due to the particularity of the conveying medium, when the conveying amount of the sludge is large, the sensor can be blocked by the sludge, and the acquisition of fault signals is influenced.
Disclosure of Invention
The invention aims to design a fault alarm method and a fault alarm device for a shaftless screw conveyor, which realize the monitoring of the shaftless screw conveyor by monitoring the current of a driving motor, send out an alarm when the working state of the shaftless screw conveyor is abnormal and improve the alarm accuracy.
In order to achieve the above object, the present invention provides a method for alarming a failure of a shaftless screw conveyor, comprising:
acquiring the current value range of a driving motor of a shaftless screw conveyor in a no-load working state of the shaftless screw conveyor;
detecting the real-time current value of the driving motor;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in the normal working state, and not sending out an alarm prompt;
and when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt.
Optionally, the method further comprises:
and when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the no-load state, and sending an alarm prompt.
Optionally, the driving motor is a three-phase driving motor, the current value of the driving motor in the no-load working state of the shaftless screw conveyor is the average value of the three-phase currents of the driving motor in the no-load working state of the shaftless screw conveyor, and the real-time current value of the driving motor is the average value of the three-phase currents of the driving motor.
Optionally, the alarm prompt includes an audible and visual alarm prompt and a data alarm prompt.
Optionally, the data alarm prompt includes state information of the shaftless screw conveyor, a real-time three-phase current value of the driving motor, and a real-time three-phase current average value of the driving motor.
Optionally, the voltage value of the driving motor in the normal working state of the shaftless screw conveyor is three-phase 380V, and the calculation formula of the current value of the driving motor in the normal working state of the shaftless screw conveyor is as follows: p/2000;
wherein I is the current value of the driving motor when the shaftless screw conveyor is in a normal working state;
and P is the power of the driving motor when the shaftless screw conveyor is in a normal working state.
The invention also provides a fault alarm device for the shaftless screw conveyor, which comprises:
the current transformer is used for detecting the real-time current value of a driving motor of the five-axis screw conveyor;
the controller is connected with the current transformer and is used for executing the following steps:
acquiring the current value of the driving motor when the shaftless screw conveyor is in a no-load working state;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in the normal working state, and not sending out an alarm prompt;
when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt;
when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the no-load state, and sending an alarm prompt;
and the alarm device is connected with the controller and used for giving an alarm according to the alarm prompt.
Optionally, the alarm device includes an audible and visual alarm device and an upper computer alarm device, the upper computer alarm device is configured to display a state of the shaftless screw conveyor, a real-time current value of the driving motor, and an alarm current value, where the alarm current value includes a current value of the driving motor in an idle state of the shaftless screw conveyor and a current value of the driving motor in a fracture state of the shaftless screw conveyor.
Optionally, the controller is a PLC controller.
The invention has the beneficial effects that: the real-time current value of the driving motor is compared with the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, so that whether the shaftless screw conveyor is in the no-load state or the fracture state is determined, an alarm can be given out in the no-load or fracture state of the shaftless screw conveyor, the working condition of the shaftless screw conveyor can be better monitored, and the alarm accuracy is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a flow diagram of a shaftless screw conveyor malfunction alerting method according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
A fault alarm method for a shaftless screw conveyor comprises the following steps:
acquiring the current value range of a driving motor of the shaftless screw conveyor in the no-load working state of the shaftless screw conveyor;
detecting the real-time current value of the driving motor;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a normal working state, and not sending out an alarm prompt;
and when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt.
Specifically, the real-time current value of the driving motor is compared with the pre-acquired current value range of the driving motor in the no-load working state of the shaftless screw conveyor, so that whether the shaftless screw conveyor is in the no-load state or the fracture state is determined, the alarm accuracy can be improved by setting the current value range of the driving motor in the no-load state of the shaftless screw conveyor, and the working condition of the shaftless screw conveyor can be better monitored; according to the invention, the working state of the shaftless screw conveyor is monitored by the change of the current of the driving motor after the load working condition of the driving motor is changed, the scheme has more advantages than the scheme of directly measuring the state signal of the speed reducer connected with the driving motor, the monitoring of the speed reducer can only monitor the state of the driving motor, the monitoring of the state of the shaftless screw conveyor is not accurate enough, and the working state of the screw conveyor cannot be well reflected; the change of current can truly reflect the mechanical state of the whole shaftless screw conveyor, the connection fracture of the screw conveyor and the driving motor causes the reduction of motor load, the current is inevitably reduced, and the upper threshold value and the lower threshold value are set for the current of the driving motor in the no-load state of the shaftless screw conveyor, so that the alarm accuracy rate is improved, and the equipment guarantee rate is improved.
Optionally, the method further comprises:
when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, the shaftless screw conveyor is judged to be in the no-load state, and an alarm prompt is sent.
Specifically, the no-shaft screw conveyor is indicated to be not output any more when in an idle state, and the alarm prompt is sent to remind a worker to check the material quantity and the material conveying condition.
Optionally, the driving motor is a three-phase driving motor, the current value of the driving motor in the no-load working state of the shaftless screw conveyor is the average value of the three-phase currents of the driving motor in the no-load working state of the shaftless screw conveyor, and the real-time current value of the driving motor is the average value of the real-time three-phase currents of the driving motor.
Specifically, the influence of external factors on the accuracy of the fault alarm is reduced by measuring the average value of the three-phase current of the driving motor, and false alarm can be reduced.
Optionally, the alarm prompt includes an audible and visual alarm prompt and a data alarm prompt.
Specifically, when the alarm occurs, the worker is reminded to check the working state of the shaftless screw conveyor through sound-light alarm, and alarm data can be output, so that the worker can visually see the real-time current value of the driving motor, and the reason of the fault alarm can be conveniently analyzed.
Optionally, the data alarm prompt includes status information of the shaftless screw conveyor, a real-time three-phase current value of the driving motor, and a real-time three-phase current average value of the driving motor.
Specifically, the state information of the shaftless screw conveyor is the working state information of the shaftless screw conveyor which is judged by comparing the real-time current value of the driving motor with the pre-acquired current value range of the shaftless screw conveyor in the no-load working state; the real-time three-phase current value of the driving motor and the real-time three-phase current average value of the driving motor can be output to facilitate the analysis of the reason of the current abnormity by workers after the fault alarm occurs.
Optionally, the voltage value of the driving motor in the normal working state of the shaftless screw conveyor is three-phase 380V, and the calculation formula of the current value of the driving motor in the normal working state of the shaftless screw conveyor is as follows: p/2000;
wherein, I is the current value of the driving motor when the shaftless screw conveyor is in a normal working state;
and P is the power of the driving motor when the shaftless screw conveyor is in a normal working state.
Specifically, the fracture position of the shaftless screw conveyor is mainly concentrated at the connecting part of the driving motor and the shaftless screw conveyor, and the current change of the driving motor is obvious due to the obvious change of the load of the driving motor before and after the fracture, namely, the current of the driving motor can directly reflect the running state of the shaftless screw conveyor; when the shaftless screw conveyor runs under the condition of load, the torque is large, the power of the driving motor is increased according to a formula, the corresponding current I is increased, the current of the driving motor is generally calculated according to twice the power of the driving motor, and when the shaftless screw conveyor is generally applied, the current I is P (kilowatt)/2 under the voltage of three phases of 380V according to the formula, namely, the current I can be estimated according to the current of 2A per kw, namely, one kilowatt and two currents.
The invention also provides a fault alarm device for the shaftless screw conveyor, which comprises:
the current transformer is used for detecting the real-time current value of a driving motor of the five-axis screw conveyor;
the controller is connected with the current transformer and is used for executing the following steps:
acquiring the current value of a driving motor when the shaftless screw conveyor is in a no-load working state;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a normal working state, and not sending out an alarm prompt;
when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt;
when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the no-load state, and sending an alarm prompt;
and the alarm device is connected with the controller and used for giving an alarm according to the alarm prompt.
Specifically, a current transformer is adopted to monitor the power electric current I of a driving motor of the shaftless screw conveyor, three holes of the current transformer respectively penetrate through a three-phase motor wire of the driving motor of the shaftless screw conveyor, and the current transformer converts U, V, W three-phase current into a 4-20ma signal through measurement and transmits the signal to a controller.
Optionally, the alarm device comprises an audible and visual alarm device and an upper computer alarm device, the upper computer alarm device is used for displaying the state of the shaftless screw conveyor, the real-time current value of the driving motor and an alarm current value, and the alarm current value comprises the current value of the driving motor in the no-load state of the shaftless screw conveyor and the current value of the driving motor in the fracture state of the shaftless screw conveyor.
Specifically, audible and visual alarm device can purchase audible and visual alarm, and host computer alarm device has the display screen, can show driving motor's real-time current value and alarm current value, makes things convenient for the staff to receive the contrastive analysis fault reason through each current value behind the audible and visual alarm.
Optionally, the controller is a PLC controller.
Examples
Fig. 1 shows a flow chart of a shaftless screw conveyor malfunction alerting method and a method of a screw malfunction alerting device according to an embodiment of the present invention.
A fault alarm method for a shaftless screw conveyor comprises the following steps:
acquiring the current value range of a driving motor of the shaftless screw conveyor in the no-load working state of the shaftless screw conveyor;
detecting the real-time current value of the driving motor;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a normal working state, and not sending out an alarm prompt;
and when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt.
In this embodiment, the method further includes:
when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, the shaftless screw conveyor is judged to be in the no-load state, and an alarm prompt is sent.
In this embodiment, the driving motor is a three-phase driving motor, the current value of the driving motor in the no-load working state of the shaftless screw conveyor is the average value of the three-phase currents of the driving motor in the no-load working state of the shaftless screw conveyor, and the real-time current value of the driving motor is the average value of the three-phase currents of the driving motor.
In this embodiment, the alarm prompts include audible and visual alarm prompts and data alarm prompts.
In this embodiment, the data alarm prompt includes the status information of the shaftless screw conveyor, the real-time three-phase current value of the driving motor, and the real-time three-phase current average value of the driving motor.
In this embodiment, the voltage value of the driving motor in the normal operation state of the shaftless screw conveyor is 380V in three phases, and the calculation formula of the current value of the driving motor in the normal operation state of the shaftless screw conveyor is as follows: p/2000;
wherein, I is the current value of the driving motor when the shaftless screw conveyor is in a normal working state;
and P is the power of the driving motor when the shaftless screw conveyor is in a normal working state.
The invention also provides a fault alarm device for the shaftless screw conveyor, which comprises:
the current transformer is used for detecting the real-time current value of a driving motor of the five-axis screw conveyor;
the controller is connected with the current transformer and is used for executing the following steps:
acquiring the current value of a driving motor when the shaftless screw conveyor is in a no-load working state;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a normal working state, and not sending out an alarm prompt;
when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt;
when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the no-load state, and sending an alarm prompt;
and the alarm device is connected with the controller and used for giving an alarm according to the alarm prompt.
In this embodiment, the alarm device includes an audible and visual alarm device and an upper computer alarm device, the upper computer alarm device is configured to display the state of the shaftless screw conveyor, the real-time current value of the driving motor, and the alarm current value, where the alarm current value includes the current value of the driving motor in the no-load state of the shaftless screw conveyor and the current value of the driving motor in the fracture state of the shaftless screw conveyor.
In this embodiment, the controller is a PLC controller.
In conclusion, when the shaftless screw conveyor is connected with a driving motor to work, the fracture position of the shaftless screw conveyor is mainly concentrated at the connection part of the shaftless screw conveyor and the driving motor, and the current change of the driving motor is obvious due to the obvious change of the load of the driving motor before and after the fracture, namely the current of the driving motor can directly reflect the running state of the shaftless screw conveyor, so the working state of the shaftless screw conveyor can be monitored by the method; and when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor in the fracture state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the fracture state. The audible and visual alarm prompt is realized by the audible and visual alarm, and when the field spiral operation condition is abnormal, the system for prompting the alarm at the first time is realized, so that the alarm effect is improved, and the operation experience of operators is enhanced. The data alarm prompt is realized by an upper computer, the upper computer is designed to control an alarm picture, and the state of the shaftless screw conveyor, the real-time monitoring numerical value of three-phase current of a driving motor, the average numerical value of the three-phase current, the set value of the alarm current, an alarm enabling button, an alarm test and the like are designed; the state of the shaftless screw conveyor is the working state of the shaftless screw conveyor, and the comparison of current values is obtained; monitoring three-phase current of the driving motor to display a three-phase current value output by the current transformer; the three-phase current average value is calculated by the PLC; the alarm current set value is an artificially set failure alarm threshold value of the shaftless screw conveyor; the alarm enabling button is used for controlling whether the alarm system participates in monitoring of the shaftless screw conveyor or not by a control person; the alarm test button is used for testing whether the alarm function of the system is intact; the alarm reset button is used for clearing alarm information after artificial intervention after alarm occurs. The controller is an alarm PLC operation controller, a MICROLOGIX 1400 controller of Rockwell AB is adopted for current signal acquisition, logic analysis and judgment, the PLC operation controller is fixed in an alarm control cabinet, and the model and the number of the corresponding analog input module and the digital output module are selected and configured according to the number of the acquired current signals and the alarm signals. The device also comprises a field control cabinet which is a system control cabinet arranged in the power distribution room and is a central pivot for collecting and sending each path of current and signals when in specific use. The method mainly comprises three parts: the system comprises a self-control operation part, a current signal acquisition part and an incoming line wiring part.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (9)
1. A fault alarm method for a shaftless screw conveyor is characterized by comprising the following steps:
acquiring the current value range of a driving motor of a shaftless screw conveyor in a no-load working state of the shaftless screw conveyor;
detecting the real-time current value of the driving motor;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in the normal working state, and not sending out an alarm prompt;
and when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt.
2. The shaftless screw conveyor malfunction alert method according to claim 1, further comprising:
and when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the no-load state, and sending an alarm prompt.
3. The method according to claim 1, wherein the driving motor is a three-phase driving motor, the current value of the driving motor in the no-load operation state of the shaftless screw conveyor is the average value of three-phase currents of the driving motor in the no-load operation state of the shaftless screw conveyor, and the real-time current value of the driving motor is the average value of the three-phase currents of the driving motor.
4. The method as claimed in claim 3, wherein the alarm prompt includes an audible and visual alarm prompt and a data alarm prompt.
5. The method as claimed in claim 4, wherein the data alarm prompt includes status information of the shaftless screw conveyor, a real-time three-phase current value of the driving motor and a real-time three-phase current average value of the driving motor.
6. The method as claimed in claim 3, wherein the voltage value of the driving motor in the normal operation state of the shaftless screw conveyor is 380V in three phases, and the current value of the driving motor in the normal operation state of the shaftless screw conveyor is calculated by the following formula: p/2000;
wherein I is the current value of the driving motor when the shaftless screw conveyor is in a normal working state;
and P is the power of the driving motor when the shaftless screw conveyor is in a normal working state.
7. A shaftless screw conveyer failure alarm device, characterized by includes:
the current transformer is used for detecting the real-time current value of a driving motor of the five-axis screw conveyor;
the controller is connected with the current transformer and is used for executing the following steps:
acquiring the current value of the driving motor when the shaftless screw conveyor is in a no-load working state;
when the real-time current value of the driving motor is larger than the upper limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in the normal working state, and not sending out an alarm prompt;
when the real-time current value of the driving motor is smaller than the lower limit of the current value range of the driving motor when the shaftless screw conveyor is in the no-load working state, judging that the shaftless screw conveyor is in a fracture state, and sending an alarm prompt;
when the real-time current value of the driving motor is larger than the lower limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor and smaller than the upper limit of the current value range of the driving motor in the no-load working state of the shaftless screw conveyor, judging that the shaftless screw conveyor is in the no-load state, and sending an alarm prompt;
and the alarm device is connected with the controller and used for giving an alarm according to the alarm prompt.
8. The failure alarm device of claim 7, wherein the alarm device comprises an audible and visual alarm device and an upper computer alarm device, the upper computer alarm device is configured to display the status of the shaftless screw conveyor, the real-time current value of the driving motor and an alarm current value, and the alarm current value comprises the current value of the driving motor in the idle state of the shaftless screw conveyor and the current value of the driving motor in the breakage state of the shaftless screw conveyor.
9. The shaftless screw conveyor malfunction alarm device of claim 7, wherein the controller is a PLC controller.
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| CN202010850196.9A CN112098837A (en) | 2020-08-21 | 2020-08-21 | Failure alarm method and device for shaftless screw conveyor |
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| CN202010850196.9A CN112098837A (en) | 2020-08-21 | 2020-08-21 | Failure alarm method and device for shaftless screw conveyor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521450A (en) * | 2021-07-14 | 2021-10-22 | 巨翊科技（上海）有限公司 | Method for automatically detecting no-load current and correcting current alarm threshold |
| CN113532896A (en) * | 2021-06-29 | 2021-10-22 | 三一汽车制造有限公司 | Dust removal equipment monitoring method and monitor thereof, and dust removal equipment |
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| CN113532896A (en) * | 2021-06-29 | 2021-10-22 | 三一汽车制造有限公司 | Dust removal equipment monitoring method and monitor thereof, and dust removal equipment |
| CN113532896B (en) * | 2021-06-29 | 2023-04-18 | 三一汽车制造有限公司 | Dust removal equipment monitoring method and monitor thereof, and dust removal equipment |
| CN113521450A (en) * | 2021-07-14 | 2021-10-22 | 巨翊科技（上海）有限公司 | Method for automatically detecting no-load current and correcting current alarm threshold |
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