KR101087045B1 - Method for safety diagnosis of hoist and crane - Google Patents

Abstract

The present invention relates to a safety diagnosis method of the hoist and crane, to ensure the safety of the use of the hoist and crane, monitoring to check the replacement of lubricating oil and parts replacement before the accident occurs, and to inform the time of replacement parts The present invention relates to a safety diagnosis system and a method of a hoist and a crane. A main CPU 10 for storing the operation on the input / output signal and the calculated data; A characteristic data input device 20 into which various characteristic information of the hoist and crane apparatus is input; A data collection unit 30 measuring load ratios and usage times of the hoist and crane devices and transmitting them to the main CPU 10; A display device 40 displaying a signal output from the main CPU 10; A signal output transmitter 50 for transmitting a sound signal and a visible signal; It is composed of a protection device 60 for controlling the power of the main CPU 10, data backup and emergency stop in case of an emergency situation. Therefore, the present invention monitors and calculates the use time and load rate in real time, and accumulates data so that the service life and replacement time of each part can be known in real time. It has the effect of preventing safety accidents by stopping partial or total operation.

Hoist, Crane, Safety Diagnosis, Usage Time, Load Rate, Signal Output

Description

Method for safety diagnosis of hoist and crane

The present invention relates to a safety diagnosis method of the hoist and crane, and more specifically, to ensure the safety of the use of the hoist and crane, to monitor the replacement of lubricants and parts replacement before the accident occurs, and to replace the parts at the end of life It is about safety diagnosis method of hoist and crane.

Hoist and crane are devices for lifting heavy loads. They are used for transporting cargo in warehouses and railway stations, or for mechanical disassembly and assembly in factories. It is a device with the ability to do so.

The main components of the hoist and crane are hooks, sheaves, ropes (chains), drums (sprockets), hoisting reducers, hoisting motors, hoisting brakes, traverse reducers, traverse wheels, traverse motors, traverse brakes, traveling saddles, girders, and traveling motors. It consists of a drive reducer, drive brake, cab, control box, pendant switch and bearings, splines, lubricating oil and grease connecting the respective mechanical elements.

However, the hoists and cranes composed of the above components are not constant in life and replacement cycles of each part, and variations occur depending on the usage time and load rate. Because there is no real-time monitoring of each part, that is, even if the operator checks each part at regular intervals, the part replacement timing is missed. A problem arises.

In order to solve the problems described above, the present invention monitors the load operation time according to the use time and load rate in real time using the service life and the replacement time for each component of the hoist and crane, the cumulative load operation time of each component replacement time The maintenance is performed immediately when it occurs.The usage time is the same as the time that the current flowed in each motor, so it accumulates and counts the time that the current has flowed in each motor, and the load ratio is proportional to the current of the hoisting motor The hoist attached to the load cell measures the load rate by measuring the value of the load cell, and provides a safety diagnosis method for the hoist and the crane that informs the user of information related to parts replacement and inspection time. have.

A configuration for achieving the object includes a main CPU for storing the operation and the calculated data on the input and output signals; A characteristic data input device to which various characteristic information of the hoist and crane apparatus is input; A data collection unit including a load rate measuring device and an operation state measuring device for measuring a load rate and a use time of a hoist and a crane device and transmitting the load rate and use time to the main CPU; A display device displaying a signal output from the main CPU; A signal output transmitter for transmitting a sound signal and a visible signal; Power protection of the main CPU, data backup and a protection device for emergency stop in case of emergency.

A method for achieving the purpose includes the tenth step of calculating the time and load rate of the hoist and crane; A twenty step of determining whether the hoist and the crane device need to be inspected based on the calculated value; A thirty-step step of returning to step S10 when the hoist and crane device are not required to be checked, and outputting a signal and data when the check is necessary; A 40th step of determining whether inspection and replacement of the lubricant or the component according to the signal and data output are performed; If the check and the replacement has been carried out to return to the step S10, if not carried out includes a 50th step of stopping the partial or full operation of the hoist and crane device.

As described above, the present invention monitors and calculates the use time and load rate of the hoist and crane device in real time, and accumulates data to know the life and replacement time of each part in real time, and checks and replaces the corresponding parts. If it is not carried out there is an effect to prevent the safety accident by stopping the hoist and crane device part or the entire operation.

1 is a configuration diagram of a safety diagnosis system of a hoist and a crane according to the present invention, Figure 2 is a flow chart of the safety diagnosis system of a hoist and a crane according to the present invention.

Hereinafter, the components will be described with reference to the drawings.

1 is a configuration diagram of a safety diagnosis system of a hoist and a crane according to the present invention, which includes a main CPU 10, a characteristic data input device 20, a data collector 30, a display device 40, and a signal output transmission device. It consists of 50 and the protection device 60, the above configuration is built in a separate box form in the hoist and crane panel.

The main CPU 10 is a semiconductor device corresponding to a human head. The main CPU 10 calculates a data value by calculating input signal data, converts the output signal to fit the calculated data value, and calculates the calculated data value. Data is saved and output to the device.

The characteristic data input device 20 inputs various characteristics (power characteristic, mechanical characteristic, measuring apparatus characteristic, component characteristic data) of the hoist and crane apparatuses to the main CPU 10, and a keypad input method and a monitor. It includes a touch panel input method that is directly input from (Monitor). Since the reference data is different according to the type, capacity and characteristics of hoist and crane, it is necessary to input data value suitable for each device. The data values include power characteristic data such as power supply, resistance and frequency, mechanical characteristic data load cell such as mechanical strength and weight, measuring device characteristic data for inputting measurement data of sensor values, and characteristics of each component. Input part characteristic data, and replace data value of parts or data value for emergency stop and warning, part replacement and trouble count Also it includes a history data value.

The data collection unit 30 is composed of a load rate measuring device 31 for measuring the load ratio by the current and the load cell signal, and the operation condition measuring device 32 for measuring the operating status by the rotary encoder and the current signal, various sensors ( Ammeter, Voltmeter, Thermometer, Anemometer, Barometer, Load Cell, etc.) and a device that converts the signal output by the sensor into a digital signal for input to the main CPU 10, the device generating the digital signal adjusts the signal protocol It includes the device.

The load ratio measuring device 31 is a sensor that detects a signal proportional to a load state, receives a current value of a motor or a signal of a load cell, compares the input data, and converts the result into a percentage or a specified index. 32) is a signal indicating that the hoist and the crane are in operation. The signal surrounding signal of the current value load cell of the motor is used alone or in combination.

The display device 40 is a device for transmitting visual information using a character or picture signal lamp such as a lamp, LED, LCD, etc., and may display a normal or abnormal state of a hoist and a crane. You can view the data entered by showing the parts' usage time, total uptime and remaining uptime, and warning messages, and when the alarm is triggered, you will be able to know what caused the alarm. Make sure to check the time sooner.

The signal output and transmission device 50 includes a data transmission device 51 for transmitting an audio signal and a visible signal, and the signal output and transmission device 50 communicates with an external device. It is a device that plays a role, and consists of a mechanical connection device that has an output function that can transmit data to a computer or an external memory device, or by connecting a printer and a device that makes a communication signal. -232C, RS 485, Fildbus method is used.

The protection device 60 includes a power supply unit 61 for controlling power, a data backup unit 62 for backing up various data, an EMI 63 and an emergency stop button 64 and an inspection stop button 65 which are electromagnetic shielding agents. It is composed of a protective device (60) consisting of.

The power supply unit 61 is a device for stably supplying power. The power supply unit 61 supplies power so as to be driven when the power supply device is interrupted or the power supply is cut off. The data backup unit 62 stores various setting data stored through the input device. And a non-volatile memory for storing the historical data even when the external power is cut off. The EMI 63 is an apparatus for blocking an element that destabilizes a system such as electromagnetic waves or magnetic waves or hinders data storage. The emergency stop button 64 outputs a contact signal or a power signal to an emergency stop signal output unit for emergency stop of a single operation or the whole machine by self-diagnosis without an operator when an abnormality occurs during hoist and crane operation. The stop button 65 sounds an alarm when the maintenance time comes and check maintenance is performed even after a specified time elapses. If not, output contact signal or power signal to the function to output the signal to stop the function.

Referring to Figure 2 describes the operation method of the hoist and crane safety diagnosis system of the present invention configured as described above are as follows.

A tenth step (S10) of calculating and calculating the use time and load ratio of the hoist and the crane; and a twentieth step (S20) of determining whether it is time to check the hoist and the crane device based on the calculated value; If it is not necessary to check the hoist and crane device, the process returns to step S10, and if it is necessary to check the step 30 (S30) for outputting signals and data, and checking the lubricant or parts according to the signal and data output and Step 40 determines whether the replacement has been carried out (S40), and if the check and replacement has been carried out to the step S10, if not carried out if the 50th step (S50) to stop the partial or full operation of the hoist and crane device It includes.

The actual time is measured by selecting a signal synchronized with the use or non-use of the parts (ex. The time for the signal output of the hoist motor is hoist, rope, hook, drum bearing, reducer, brake release coil, etc. The speed of the drive motor is output and the time when the signal of the traveling motor is output is the driving gear reducer, the current collector, the speed reducer, the brake release coil, etc.). It is regarded as a state, and the counter is activated and integrated in this state.

In addition, load factor measurement is an algorithm that considers the ratio of the lifting load and hoist load lifted by the hoist and crane as the load factor, that is, calculated by calculating the current value of the measured hoist motor as a numerator and the initially inputted rated current value as the denominator. Since the value is proportional to the actual lifting load for the rated lifting load, it means the process of calculating the measured current value or load cell's measured value and initial input value.

In the calculation of the measured time and the load ratio as described above, the load multiplied by the load rate and the use time is calculated as the load operation time, but the load operation time is calculated by multiplying the measured and calculated load rate and the use time and the specified coefficient.

At the time of checking the lubricating oil and parts of the hoist and crane device according to the calculated value, after giving the part number to the parts to be managed (P11, P12, P13 ... P21, P22, P23 ... Pnn), Parts that are applied to the function are divided into parts whose life is inversely proportional to the number of times of use (pendant switches, limit switches, etc.) and parts whose life is inversely proportional to the number of times of use and load rates (brake lining, contact switch contacts, starting resistance, starting Reactor, etc.), and parts whose life is inversely proportional to the load rate and usage time (many of them are hook ropes, electric motors, bearings, reducers, lubricants, etc.), and when the input signal is detected, the parts related to them are classified. Next, the load time rate, the number of times, and the number of times of load use for each part are calculated by individual algorithms, accumulated in the corresponding storage period, and stored as data. When it is determined that the value is the same as that of the control unit, it is determined as a check point or an exchange point, and the determined signal and output data are output through the data transmission device 51 of the signal output transmission device 50.

Therefore, the present invention monitors the load operation time according to the use time and load rate in real time using the service life and the replacement time for each part of the hoist and crane to immediately perform maintenance when the accumulated load operation time occurs during the replacement time of each part. Since the use time is the same as the time that the current flowed in each motor, the time that the current flowed in each motor is accumulated and counted, and the load ratio is proportional to the current of the hoisted motor so that the current is measured and counted, The hoist attached with the load cell measures the load rate by measuring the value of the load cell, and informs the user of the information regarding when to replace and inspect the parts.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the appended claims. Anyone can grow up easily.

1 is a configuration diagram of a safety diagnosis system of a hoist and a crane according to the present invention.

Figure 2 is a flow chart of the safety diagnosis of the hoist and crane according to the present invention.

Description of the Related Art [0002]

10: main CPU 20: characteristic data input device

30: data collection unit 31: load rate measuring device

32: operation status measurement device 40: display device

50: signal output transmission device 51: data transmission device

60: protection device 61: power supply

62: data backup unit 63: EMI

64: emergency stop button 65: check stop button

Claims (6)

delete delete delete In the safety diagnosis method of hoist and crane, A tenth step (S10) of calculating and calculating a usage time and a load ratio of the hoist and the crane; A 20th step S20 of determining whether a check of the hoist and the crane device is necessary based on the calculated value; A thirtieth step (S30) of returning to step S10 when the check of the hoist and crane device is not necessary, and outputting a signal and data when the check is necessary; A 40th step (S40) of determining whether inspection and replacement of the lubricant or the parts according to the signal and data output are performed; If the check and the replacement was carried out to return to the step S10, if not carried out includes a 50th step (S50) to stop the partial or full operation of the hoist and crane device, The use time is measured by selecting a signal synchronized with the use or non-use of the part as a representative, and the time when the output signal of the sensor provided in the corresponding part is regarded as a commercial state of the corresponding part, and the counter is operated in this state and integrated. The load ratio measurement is calculated by calculating the ratio of the lifting load and the rated load lifted by the hoist and crane as the load ratio, and multiplying the load ratio by the use time to calculate the load operation time. A method for safety diagnosis of a hoist and a crane, characterized in that the load operation time is calculated by multiplying the used load rate by the used time and a specified coefficient. delete The method of claim 4, wherein The lubricating oil and parts inspection of the hoist and crane device, after assigning the part number to the parts to be managed, and classifies the parts applied to the life-related functions, the parts (pendant switch, limit switch) and the life is inversely proportional to the number of times of use , Parts whose life is inversely proportional to the number of times used and load rate (brake lining, contact switch contacts, starting resistance, starting reactor) and parts whose life is inversely proportional to load rate and use time (many parts include hook rope, motor, bearing, reducer, Lubricating oil), and when the input signal is detected, the parts of the input signal are classified, and the load time rate, the number of times and the number of times of use of each part are calculated by a separate algorithm and accumulated in the corresponding storage period and stored as data. If it is judged as the same value compared with the life data input at the beginning, it is determined as the time of inspection or replacement. The method for assessing the safety of a given signal and a hoist and crane, comprising a step of outputting the output data.

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