CN220005409U - Lifting control device of elevator - Google Patents
Lifting control device of elevator Download PDFInfo
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- CN220005409U CN220005409U CN202320044764.5U CN202320044764U CN220005409U CN 220005409 U CN220005409 U CN 220005409U CN 202320044764 U CN202320044764 U CN 202320044764U CN 220005409 U CN220005409 U CN 220005409U
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Abstract
The utility model relates to the technical field of elevators, in particular to a lifting control device of a lifting machine, which comprises a lifting control device, an analog quantity conversion unit and a PLC control unit which are sequentially connected; the lifting control device is used for acquiring lifting data of the lifting machine; the analog quantity conversion unit is used for carrying out analog-to-digital conversion on the lifting data and transmitting the lifting data to the PLC control unit; the PLC control unit is used for monitoring the lifting data. The lifting control device provided by the utility model is beneficial to finding abnormality in time when the resistance ruler breaks down and the lifting of the elevator is abnormal, so that measures are taken in time to prevent safety accidents such as steel belt overturning, even stop of the production line, and the like, and prevent unnecessary production cost.
Description
Technical Field
The utility model relates to the technical field of elevators, in particular to a lifting control device of a lifting machine.
Background
On a continuous annealing packaging line of a cold rolling mill, the lifting position of a lifter is measured and controlled through a resistance ruler arranged on a lifter frame. The resistance ruler is influenced by the use environment, is extremely easy to interfere, reduces measurement accuracy, and causes the steel coil to be turned over and even the production line to stop running. In addition, the elevator produces great vibrations in the promotion in-process, causes the life of resistance ruler to shorten, and resistance ruler price is expensive, increases manufacturing cost.
Disclosure of Invention
In order to improve the measuring precision of the resistance ruler, reduce the production cost,
the utility model provides a lifting control device of a lifting machine, which comprises a lifting control device, an analog quantity conversion unit and a PLC control unit which are sequentially connected; the lifting control device is used for acquiring lifting data of the lifting machine; the analog quantity conversion unit is used for carrying out analog-to-digital conversion on the lifting data and transmitting the lifting data to the PLC control unit; the PLC control unit is used for monitoring the lifting data.
Further, the lifting control device comprises a ranging sensor, a sensor reflector and a lifting cylinder connected with the lifting machine in sequence; the lifting cylinder is used for controlling the lifting of the lifting machine; the sensor reflector is used for amplifying the transmission signals of the lifting data; the distance measuring sensor is used for acquiring the distance between the lifting cylinder and the distance measuring sensor and transmitting the distance measuring sensor to the analog quantity conversion unit as lifting data.
Further, the analog quantity conversion unit is connected with the PLC control unit by adopting an optical fiber; the analog quantity conversion unit is connected with the ranging sensor by adopting an optical fiber so as to eliminate errors caused by signal transmission delay.
Further, a photoelectric converter is arranged in the analog quantity conversion unit and is used for completing photoelectric conversion between the optical signals of the lifting data and the electrical signals of the lifting data.
Further, the PLC control unit is configured to monitor that the lifting data includes that the PLC control unit obtains an actual measurement value of the lifting data, and compares the actual measurement value with a theoretical value corresponding to the lifting data at a corresponding time, so as to determine and monitor whether the actual measurement value is normal.
Further, the PLC control unit is connected with the lifting control device through an optical fiber, and when the lifting data are abnormal, the PLC control unit controls the lifting control device to move to a correction position based on the lifting data.
Further, before the PLC control unit controls the lifting control device to move to the correction position, the PLC control unit calculates and obtains a difference value between the actual measurement value and the theoretical value, and judges the current moving direction of the elevator based on the actual measurement value; the PLC control unit determines the correction position based on the difference value and the moving direction.
Further, the PLC control unit is connected with an HMI display unit for displaying the monitoring result of the lifting data.
Further, when the monitoring result is abnormal, the HMI display unit gives an alarm.
Further, the alarm includes, but is not limited to, sounding a buzzer or setting the measured value of the abnormality to a highlighted state on the HMI display unit.
Advantageous effects
The utility model provides a lifting control device of a lifting machine, which comprises a lifting control device, an analog quantity conversion unit and a PLC control unit which are connected in sequence; the lifting control device is used for acquiring lifting data of the lifting machine; the analog quantity conversion unit is used for carrying out analog-to-digital conversion on the lifting data and transmitting the lifting data to the PLC control unit; the PLC control unit is used for monitoring the lifting data. The lifting control device provided by the utility model is beneficial to finding abnormality in time when the resistance ruler breaks down and the lifting of the elevator is abnormal, so that measures are taken in time to prevent safety accidents such as steel belt overturning, even stop of the production line, and the like, and prevent unnecessary production cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the device structure according to embodiment 1 of the present utility model.
Description of the drawings:
the lifting control device comprises a lifting control device body 100, a ranging sensor 101, a sensor reflector 102, a lifting cylinder 103, an analog quantity conversion unit 104 and a PLC control unit 105.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Example 1
On the cold rolling production line, the steel coil is picked up by a lifter and lifted, the steel coil is inserted into the coil diameter of the steel coil, and the steel coil is carried on the cold rolling production line. The ascending position and the descending position of the lifter are usually obtained by measuring a resistance ruler arranged in the lifter, but the resistance ruler belongs to a sensitive instrument and is seriously affected by environment, and the lifter usually generates larger vibration in the working process, so that the resistance ruler fails. When the resistance ruler breaks down, the lifting position of the lifting machine cannot be accurately obtained, so that the anti-collision ring of the lifting machine directly overturns the steel coil, the packaging production line is stopped for maintenance, and the production capacity is reduced. In addition, the resistance ruler is high in price and failure rate, and the frequent replacement causes the rise and waste of production cost.
Based on this, referring to fig. 1, embodiment 1 proposes a lifting control device of a lifting machine, which includes a lifting control device 100, an analog conversion unit 104, and a PLC control unit 105 connected in this order; the lifting control device 100 is connected with the analog quantity conversion unit 104 through an optical fiber, and the analog quantity conversion unit 104 is connected with the PLC control unit 105 through an optical fiber.
The lifting control device 100 is used for acquiring lifting data of a lifting cylinder of the lifting machine; the analog conversion unit 104 is configured to perform analog-to-digital conversion on the lifting data and then transmit the lifting data to the PLC control unit 105; the PLC control unit is used for monitoring the lifting data.
The lifting control device 100 comprises a ranging sensor 101, a sensor reflector 102 and a lifting cylinder 103 connected with the lifting machine, which are sequentially connected; the lifting cylinder 103 is used for controlling the lifting of the lifter; the sensor reflector 102 is used for amplifying the transmission signal of the lifting data; the sensor reflector 102 and the lifting cylinder 103 move up and down along with the lifting machine; the distance measuring sensor 101 is used for acquiring the distance between the lifting cylinder 103 and the distance measuring sensor 101, and transmitting the distance measuring sensor as the lifting data to the analog conversion unit 104.
The ranging sensor 101 used in embodiment 1 is of the model VDM28-8-L-IO73C110122, and has high accuracy, and is mounted on a work surface; as an alternative embodiment, the distance measuring sensor 1 may also be mounted on the ground; an integrated control board is arranged inside the distance measuring sensor 101.
As an alternative embodiment, the analog conversion unit 104 is connected to the PLC control unit 105 by using an optical fiber; the analog conversion unit 104 is connected to the ranging sensor 101 by using an optical fiber, so as to eliminate errors caused by signal transmission delay.
As an alternative embodiment, the analog-to-digital conversion unit 104 is internally provided with a photoelectric converter for converting the optical signal of the elevation data input from the ranging sensor 101 to the analog-to-digital conversion unit 104 into an electrical signal of the elevation data and converting the electrical signal output from the analog-to-digital conversion unit 104 to the PLC control unit 105 into an optical signal for optical fiber transmission, so as to improve transmission efficiency and eliminate control accuracy errors caused by transmission time differences.
The PLC control unit 105 transcodes the lifting data again, and the PLC control unit obtains an actual measurement value of the lifting data, and compares the actual measurement value with a theoretical value corresponding to the lifting data at a corresponding time, so as to determine and monitor whether the actual measurement value is normal. When the monitoring result is normal, the descending position of the lifting machine is accurately positioned at the strip steel inlet, and the ascending position of the lifting machine is accurately aligned with the coil diameter of the cold rolling line, so that the coil is accurately inserted into the coil diameter of the coil, and the coil is prevented from falling laterally.
The PLC control unit 105 is connected to an HMI display unit through an optical fiber, and is configured to display a monitoring result of the elevation data. And on the HMI display unit, when the monitoring result is abnormal, the HMI display unit gives an alarm.
The working principle of the device provided in this embodiment 1 will now be described in detail with reference to specific embodiments:
because the temperature on the cold rolling production line is low, in order to eliminate the influence of air temperature on measurement accuracy, the ranging sensor 101, the sensor reflector 102, the lifting cylinder 103, the analog conversion unit 104, the PLC control unit 105 and the integrated control board adopted in the embodiment 1 are all available components with cold rolling high temperature resistance.
When the resistance ruler fails and accurate numerical measurement cannot be performed and the actual measurement value is too large, the resistance ruler circuit is disconnected, and the lifting control device of the lifting machine provided by the embodiment 1 is started.
The measured value of the elevation data is transmitted from the distance measuring sensor 101 to the analog conversion unit 104 after signal amplification is performed by passing through the sensor reflecting plate 102 provided between the distance measuring sensor 101 and the lift cylinder 103 to reduce the measurement error.
The output current of the analog quantity conversion unit 104 is 4-20 mA, and is arranged in the ET cabinet. The photoelectric converter built in the analog-to-digital conversion unit 104 receives the optical signal of the elevation data transmitted through the optical fiber, converts the optical signal of the elevation data into an electrical signal, transmits the electrical signal to the analog-to-digital converter built in the analog-to-digital conversion unit 104, converts the analog signal of the elevation data into an electrical signal, converts the electrical signal of the elevation data output from the analog-to-digital conversion unit 104 into an optical signal, and outputs the optical signal to the PLC control unit 105 through the optical fiber. The PLC control unit 105 compares the measured value of the elevation data with the theoretical value corresponding to the elevation data at the corresponding time to determine and monitor whether the measured value is normal, and transmits the monitoring result to the HMI display unit through the optical fiber. When the monitoring result is abnormal, the HMI display unit sends out a buzzing alarm and informs equipment maintenance personnel to check whether the ascending height and the descending height of the elevator are accurate or not on the production line, so that the elevator is prevented from being lifted or descended for a plurality of times, the steel coil falling damage caused by collision of the anti-collision ring on the elevator to the steel coil is prevented, and the occurrence of safety accidents such as production line production stoppage and the like are prevented. In addition, the embodiment 1 provides a device with simple structure and low cost, which is convenient for mass implementation in industry.
Economic benefit brought by the device provided in this embodiment 1:
1. production efficiency: and the continuous annealing 2018-2021 causes the blocking of the continuous annealing production line due to the problem of a lifting machine, and the stopping time is 5.27 hours. While the output of continuous annealing is 145 tons/hour, and the average single profit is 638 yuan/ton; the economic benefit is 145 tons/hour 5.27 hours 638 yuan/ton=48.75 ten thousand yuan.
2. Spare parts are saved: the cost of the resistance ruler is 0.38 ten thousand yuan, and the cost of the fog counter sensor is 0.07 ten thousand yuan. Spare part loss = (0.38-0.07) 6 times per year = 1.86 ten thousand yuan per year.
3. The annual economic benefit is 48.75+1.86=50.61 ten thousand yuan/year.
Social benefit brought by the device provided in this embodiment 1:
1. the monitoring can be performed on the HMI interface, so that the labor intensity of operators is reduced, and the standardized operation level is improved.
2. The management level is improved, the fine management degree of machine material consumption, personnel consumption and the like is reduced through the development of the monitoring device informatization device, and the purposes of improving quality and efficiency, reducing energy medium consumption and improving and optimizing management flow are achieved.
Example 2
Based on the same concept, embodiment 2 of the present utility model provides a lifting control device of a lifting machine, which is different from embodiment 1 in that a PLC control unit is connected to the lifting control device through an optical fiber.
The PLC control unit obtains an actual measurement value of the lifting data, compares the actual measurement value with a theoretical value corresponding to the lifting data at the corresponding moment, and judges and monitors whether the actual measurement value is normal or not.
When the measured value of the lifting data is abnormal, the PLC control unit calculates a difference D between the measured value F and the theoretical value M, wherein D=F-M.
And then judging the moving direction of the elevator at the moment based on the lifting data. When the lifting data F increases with the increase of time, the process hoist is in a lifting state; otherwise, the elevator is in a descending state.
When the elevator is in a lifting state and F is more than M, sending a downward movement instruction to the cylinder lifting machine, wherein the downward movement correction position is downward D distance from the current position;
when the elevator is in a lifting state and F is less than M, an upward movement instruction is sent to the cylinder lifting machine, and the current position of the upward movement correction position is upward by a distance D;
when the elevator is in a descending state and F is more than M, an upward movement instruction is sent to the cylinder lifting machine, and the current position of the upward movement correction position is upward by a distance D;
when the elevator is in a descending state and F is less than M, sending a downward movement instruction to the cylinder lifting machine, wherein the downward movement correction position is downward D distance from the current position;
in addition, when the PLC control unit monitors the lifting data, the HMI display unit is controlled to display and record the occurrence time, the numerical value and the correction condition of the abnormal lifting data. And setting the abnormal actual measurement value to be in a highlight state on the HMI display unit for maintenance and inspection.
The device adopted in embodiment 2 does not need manual intervention, automatically monitors lifting data of the lifting machine in the working process of the lifting machine, judges the moving direction of the lifting machine at the first time when the lifting data are abnormal, calculates and obtains the correction position of the current lifting machine according to the difference value between the theoretical value and the actual measured value of the lifting data and the moving direction of the lifting machine, automatically controls the lifting machine to move to the correction position, ensures that strip steel on the production line enters the lifting machine, and accurately inserts the coil diameter of the steel coil. The production line safety and stability are improved, and meanwhile, the labor cost and the time cost for processing faults are further reduced.
Claims (6)
1. The lifting control device of the elevator is characterized by comprising a lifting control device, an analog quantity conversion unit and a PLC control unit which are connected in sequence; the lifting control device is used for acquiring lifting data of the lifting machine; the analog quantity conversion unit is used for carrying out analog-to-digital conversion on the lifting data and transmitting the lifting data to the PLC control unit; the PLC control unit is used for monitoring the lifting data.
2. The lifting control device of a lifting machine according to claim 1, wherein the lifting control device comprises a ranging sensor, a sensor reflector and a lifting cylinder connected with the lifting machine, which are connected in sequence; the lifting cylinder is used for controlling the lifting of the lifting machine; the sensor reflector is used for amplifying the transmission signals of the lifting data; the distance measuring sensor is used for acquiring the distance between the lifting cylinder and the distance measuring sensor and transmitting the distance measuring sensor to the analog quantity conversion unit as lifting data.
3. The lifting control device of a lifting machine according to claim 2, wherein the analog conversion unit is connected with the PLC control unit by an optical fiber; the analog quantity conversion unit is connected with the ranging sensor by adopting an optical fiber so as to eliminate errors caused by signal transmission delay.
4. A lifting control device of a lifting machine according to claim 3, wherein the analog conversion unit is internally provided with a photoelectric converter for performing photoelectric conversion between an optical signal of the lifting data and an electrical signal of the lifting data.
5. The lifting control device of a lifter according to claim 1, wherein the PLC control unit is connected to the lifting control device through an optical fiber, and controls the lifting control device to move to a correction position based on the lifting data when an abnormality occurs in the lifting data.
6. The lifting control device of the lifting machine according to claim 1, wherein the PLC control unit is connected with an HMI display unit for displaying a monitoring result of the lifting data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320044764.5U CN220005409U (en) | 2023-01-08 | 2023-01-08 | Lifting control device of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320044764.5U CN220005409U (en) | 2023-01-08 | 2023-01-08 | Lifting control device of elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220005409U true CN220005409U (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320044764.5U Active CN220005409U (en) | 2023-01-08 | 2023-01-08 | Lifting control device of elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220005409U (en) |
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2023
- 2023-01-08 CN CN202320044764.5U patent/CN220005409U/en active Active
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