CN110703820B - Method and device for controlling oxygen lance transverse trolley - Google Patents
Method and device for controlling oxygen lance transverse trolley Download PDFInfo
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- CN110703820B CN110703820B CN201910846526.4A CN201910846526A CN110703820B CN 110703820 B CN110703820 B CN 110703820B CN 201910846526 A CN201910846526 A CN 201910846526A CN 110703820 B CN110703820 B CN 110703820B
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- traversing carriage
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
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- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a method and a device for controlling an oxygen lance traversing carriage, wherein the method is applied to the device for controlling the oxygen lance traversing carriage and comprises the following steps: the controller controls the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the converting position direction at a first preset speed; when the controller detects that the output torque of the motor meets a first preset range in the operation process of the oxygen gun traversing carriage, the controller controls the frequency converter to output a second power supply voltage, and the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to decelerate from a first preset speed to a second preset speed; when the controller detects converting position information, the controller controls the frequency converter to output a third power supply voltage, so that a third preset degree of transverse movement of the oxygen lance is 0, an enabling signal of the frequency converter is kept, and after a first preset duration of the enabling signal is kept, a locking instruction for the transverse movement vehicle of the oxygen lance is generated, and accurate positioning for the transverse movement vehicle of the oxygen lance is achieved.
Description
Technical Field
The invention relates to the technical field of steelmaking, in particular to a method and a device for controlling an oxygen lance transverse trolley.
Background
At present, two oxygen guns are configured at the converter, and an oxygen gun traversing device corresponding to each oxygen gun is used, one oxygen gun is standby, the corresponding oxygen gun traversing device is used in a converting position, the standby oxygen gun is the corresponding oxygen gun traversing device in a standby position, and the gun replacing operation of the oxygen gun is realized by controlling the oxygen gun traversing device corresponding to the used oxygen gun to traverse to the standby position or controlling the oxygen gun traversing device corresponding to the standby oxygen gun to traverse to the converting position.
However, in the prior art, when the oxygen lance is positioned, if the sensor is used to detect the signal reaching the converting position, the oxygen lance traversing device is locked, the locking rod is stressed too much, so that the locking rod is damaged or bent, and the oxygen lance traversing device cannot be positioned accurately.
Therefore, how to ensure the accurate positioning and stable stopping of the oxygen lance traversing device is a technical problem to be solved at present.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and apparatus for controlling a transverse trolley of an oxygen lance which overcomes or at least partially solves the above problems.
In one aspect, an embodiment of the present invention provides a method for controlling an oxygen lance traversing carriage, which is applied to a device for controlling an oxygen lance traversing carriage, and the device includes: the device comprises a controller, a frequency converter and a motor; the method comprises the following steps:
the controller controls the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the converting position direction at a first preset speed;
when the controller detects that the output torque of the motor meets a first preset range in the running process of the oxygen gun traversing carriage, the controller controls the frequency converter to output a second power supply voltage, and the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to decelerate from the first preset speed to a second preset speed;
when the controller detects converting position information, the controller controls the frequency converter to output a third power supply voltage so as to control the motor to drive a third preset speed of the oxygen lance traversing carriage to be 0, keep an enabling signal of the frequency converter, and generate a locking instruction for the oxygen lance traversing carriage after keeping the enabling signal for a first preset time length so as to lock the oxygen lance traversing carriage.
Further, after the controller controls the third power supply voltage output by the frequency converter to control the third preset speed of the oxygen lance traversing carriage driven by the motor to be 0, and maintains an enabling signal, and maintains the first preset torque range, the method further comprises:
judging whether the converting bit information is detected;
when the converting position information is detected, a locking instruction for the oxygen lance traversing carriage is generated, so that the oxygen lance traversing carriage is locked.
Further, after judging whether the converting bit information is detected, the method further comprises:
when the converting position information is not detected, controlling the frequency converter to output the reverse second power supply voltage, so that the motor drives the oxygen lance traversing carriage to reversely run at the second preset speed;
in the reverse running process, if the controller detects the converting position information, the controller controls the frequency converter to output the third power supply voltage so as to control the motor to drive the third preset speed of the oxygen gun traversing carriage to be 0, keep the enabling signal of the frequency converter, and generate a locking instruction for the oxygen gun traversing carriage after keeping the second preset time length so as to lock the oxygen gun traversing carriage.
Further, after the controller controls the frequency converter to output a third power supply voltage to control the motor to drive a third preset speed of the oxygen lance traversing carriage to be 0, and keep an enabling signal of the frequency converter, and keep a first preset torque range of the enabling signal, the method further comprises:
and controlling the frequency converter to stop working.
Further, after the controller controls the frequency converter to output the first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the ratchet wheel rail clamping direction at the first preset speed, the method further comprises the following steps:
the controller judges whether the operation time of the motor driving the oxygen lance traversing carriage to clamp the ratchet wheel at a first preset speed is longer than a third preset time;
and when the current output torque of the motor is greater than the third preset duration, acquiring the current output torque of the motor, and judging whether the current output torque meets the first preset range.
On the other hand, the embodiment of the invention also provides a device for controlling the transverse trolley of the oxygen lance, which comprises:
the device comprises a controller, a frequency converter and a motor;
the controller is used for controlling the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the ratchet wheel rail clamping direction at a first preset speed, and the controller obtains the output torque of the motor to be a first output torque through the frequency converter;
the controller is used for determining that the current second output torque of the motor is larger than the first preset torque in the running process of the oxygen gun traversing carriage, and controlling the frequency converter to output a second power supply voltage when the difference value between the second output torque and the first preset torque is larger than a preset value, wherein the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to be decelerated from the first preset speed to a second preset speed;
the controller is used for controlling the frequency converter to output a third power supply voltage when converting position information is detected, so as to control the motor to drive a third preset speed 0 of the oxygen lance traversing carriage, keep an enabling signal of the frequency converter, and generate a locking instruction for the oxygen lance traversing carriage after keeping a first preset time length of the enabling signal, so that the oxygen lance traversing carriage is locked.
Further, the controller is further configured to determine whether the converting position information is detected after controlling the third power supply voltage output by the frequency converter to control the third preset speed at which the motor drives the oxygen lance traversing carriage to be 0, maintaining an enable signal, and maintaining the first preset duration; when the converting position information is detected, a locking instruction for the oxygen lance traversing carriage is generated, so that the oxygen lance traversing carriage is locked.
Further, the controller is further used for controlling the frequency converter to output the reverse second power supply voltage after judging whether the converting position information is detected or not and when the converting position information is not detected, so that the motor drives the oxygen lance traversing carriage to reversely run at the second preset speed;
in the reverse running process, if the controller detects the converting position information, the controller is further configured to control the frequency converter to output the third power supply voltage, so as to control the motor to drive a third preset speed of the oxygen gun traversing vehicle to be 0, keep an enabling signal of the frequency converter, and after keeping a second preset time length, generate a locking instruction for the Yang Qing traversing vehicle, so that the oxygen gun traversing vehicle is locked.
Further, after the controller is configured to control the frequency converter to output a third power supply voltage, so as to control the motor to drive a third preset speed 0 of the oxygen lance traversing vehicle, and maintain an enable signal of the frequency converter, and maintain the enable signal for a first preset duration, the controller is further configured to: and controlling the frequency converter to stop working.
Further, after the controller is used for controlling the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the ratchet wheel rail clamping direction at a first preset speed, the controller is further used for:
judging whether the time length of the motor driving the oxygen lance traversing carriage to move towards the ratchet wheel clamping rail at a first preset speed is longer than a third preset time length or not;
and when the current output torque of the motor is greater than the third preset duration, acquiring the current output torque of the motor, and judging whether the current output torque meets the first preset range.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the invention provides a method for controlling an oxygen lance traversing carriage, which is applied to summarizing a device for controlling the oxygen lance traversing carriage, and comprises the following steps: the method comprises the following steps of: the controller controls the frequency converter to output a first power supply voltage to control the motor to drive the oxygen gun traversing carriage to run towards the converting position at a first preset speed, in the running process, when the controller detects that the output torque of the motor meets a first preset range, the controller controls the frequency converter to output a second power supply voltage, the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to be decelerated from the first preset speed to a second preset speed, when the controller detects a converting position signal, the controller controls the frequency converter to output a third power supply voltage to control the motor to drive the third preset speed of the oxygen gun traversing carriage to be 0, and the enabling signal of the frequency converter is kept, and after the enabling signal is kept for a first preset time, a locking instruction of the oxygen gun traversing carriage is generated, so that the oxygen gun traversing carriage is locked, because before the oxygen gun traversing carriage does not reach the ratchet wheel clamping rail, the motor drives the oxygen gun traversing carriage to run at a high speed through the control of the frequency converter, the running efficiency can be improved, meanwhile, when the oxygen gun traversing carriage reaches the ratchet wheel clamping rail, the speed of the motor drives the oxygen gun traversing carriage is reduced through the control of the frequency converter to run at a low speed, the phenomenon that the oxygen gun traversing carriage is positioned inaccurately due to the fact that the speed is too fast and easily exceeds the converting position is avoided, then, when the converting position signal is detected, the third power supply voltage is controlled to be output by the frequency converter, the third preset speed of the motor drives the oxygen gun traversing carriage is controlled to be 0, the locking of the oxygen gun traversing carriage is carried out after the enabling signal of the frequency converter is maintained for a first preset duration, the phenomenon that the oxygen gun traversing carriage is positioned inaccurately and cannot be stopped stably can be effectively avoided, thereby realizing the accurate positioning of the oxygen lance transverse trolley.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also throughout the drawings, like reference numerals are used to designate like parts. In the drawings:
FIG. 1 is a schematic view of an oxygen lance traversing carriage during operation in accordance with an embodiment of the present invention;
FIG. 2 is a schematic flow chart showing the steps of a method for controlling an oxygen lance traversing carriage in an embodiment of the invention;
FIG. 3 is a schematic view showing the structure of an apparatus for controlling a transverse trolley of an oxygen lance according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to 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 disclosure to those skilled in the art.
As shown in fig. 1, in a scenario where the embodiment of the present invention is applicable, the present invention includes two oxygen lance traversing vehicles 101, and oxygen lances respectively located on the oxygen lance traversing vehicles, where one oxygen lance is an active oxygen lance, and the other oxygen lance is a standby oxygen lance.
When the oxygen lance is in a problem, the lance changing operation can be performed, namely, the oxygen lance traversing carriage 101 at the converting position limit 102 is moved to the standby limit 103, and the oxygen lance traversing carriage 101 at the standby limit 103 at the other end is moved to the converting position limit 102. Realizing gun changing operation.
Example 1
The embodiment of the invention provides a method for controlling an oxygen lance traversing carriage, which is applied to a device for controlling the oxygen lance traversing carriage, and comprises the following steps: the device comprises a controller, a frequency converter and a motor, wherein the motor is used for driving wheels of the oxygen lance traversing carriage. Wherein the controller is specifically a PLC (programmable logic controller).
The method specifically comprises the following steps as shown in fig. 2: s201, a controller controls a frequency converter to output a first power supply voltage so as to control a motor to drive an oxygen lance traversing carriage to run in a converting position direction at a first preset speed;
s202, when the controller detects that the output torque of the motor meets a first preset range in the running process of the oxygen lance traversing carriage, the controller controls the frequency converter to output a second power supply voltage, and the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen lance traversing carriage to be decelerated from a first preset speed to a second preset speed;
and S203, when the controller detects converting position information, the controller controls the frequency converter to output a third power supply voltage so as to control the motor to drive the third preset speed of the oxygen gun traversing carriage to be 0, and keeps the output of an enabling signal of the frequency converter, and after the first preset duration of the enabling signal is kept, a locking instruction for the oxygen gun traversing carriage is generated so as to lock the oxygen gun traversing carriage.
In a specific embodiment, when the oxygen lance traversing carriage automatically changes the lance, one oxygen lance traversing carriage moves to the standby position, one oxygen lance traversing carriage moves to the converting position, a ratchet wheel clamping rail is arranged in the middle of the operation to the converting position, and each oxygen lance traversing carriage is provided with a ratchet wheel which is used in cooperation with the ratchet wheel clamping rail. Thus, the oxygen lance traversing carriage is carried in the process of operating the oxygen lance to the converting station and comprises three stages, namely, the first stage: before reaching the ratchet wheel clamping rail; and a second stage: before a controller receives a converting position signal on a ratchet wheel clamping rail; and a third stage, when receiving the converting bit signal.
Firstly, in the first stage, the track is smooth and free from any obstruction before the track is clamped by the ratchet wheel, so that the oxygen gun traversing carriage runs stably in the first stage, and therefore, the controller controls the frequency converter to output a first power supply voltage to control the motor to drive the oxygen gun traversing carriage to run towards the converting position at a first preset speed, and S201 is executed.
Specifically, the frequency converter can output a first power supply voltage of 40-60 Hz, so that the motor is controlled to drive the oxygen lance to move transversely at a high speed, the first preset speed is a relatively high speed, at the moment, the torque output by the motor runs smoothly, namely, at the moment, the torque output by the motor is 57-65% of rated torque, namely, 25-28Nm.
The first power supply voltage output by the frequency converter is controlled by the controller to enable the electrode to drive the oxygen gun traversing carriage to run in the converting position direction Gao Xu, so that the oxygen gun traversing carriage can run rapidly, and rapid gun replacement is ensured.
After S201, the device also comprises a controller for judging whether the time length of the motor driving the oxygen lance traversing carriage to move towards the ratchet wheel clamping rail at the first preset speed is longer than the third preset time length;
and when the current output torque of the motor is greater than the third preset duration, acquiring the current output torque of the motor, and judging whether the current output torque meets the first preset range.
Specifically, the third preset time period is specifically 6s. When the oxygen gun traversing carriage runs at a high speed for more than 6s, the motor output torque detected in real time is compared, so that the confusion of the abrupt change of the torque when the motor starts and the abrupt change of the torque when the ratchet wheel starts to run is avoided when the motor output torque is compared at the beginning.
Then, it is necessary to determine whether the output torque of the motor satisfies the first preset range.
And in the second stage, S202, when the controller detects that the output torque of the motor meets the first preset range, the controller controls the frequency converter to output a second power supply voltage, and the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to decelerate from the first preset speed to the second preset speed.
The oxygen lance traversing carriage is controlled to reduce the speed, so that the oxygen lance traversing carriage is convenient to stop rapidly when approaching the converting position.
The output torque of the motor is suddenly increased from 57% -65% of rated torque to 80% -90% of rated torque, namely, the first preset range is 80% -90% of rated torque. Thereby confirm that this oxygen rifle sideslip car reaches on the ratchet card rail, this moment, this oxygen rifle sideslip car is still moving forward, but, the speed compares when not reaching this ratchet card rail, and operating speed reduces.
The controller controls the frequency of the second power supply voltage of the output of the frequency converter to be 15Hz at the moment, and the frequency of the second power supply voltage is smaller than that of the first power supply voltage.
And in the third stage, when the converting position information is detected, the controller controls the frequency converter to output a third power supply voltage so as to control the motor to drive the third preset speed of the oxygen lance traversing carriage to be 0, and keeps the enabling signal of the frequency converter, and after the enabling signal is kept for a first preset time period, the controller generates a locking instruction for the oxygen lance traversing carriage so as to lock the oxygen lance traversing carriage.
In the third stage, when the oxygen gun traversing carriage runs on the ratchet wheel clamping rail, the controller detects that converting position information appears, and at the moment, the frequency converter is controlled to output a third power supply voltage, so that the running speed of the oxygen gun traversing carriage is gradually reduced to 0 from a low speed in the second stage. Meanwhile, the controller needs to control the frequency converter to output an enabling signal so as to prevent the oxygen lance traversing trolley from sliding, and after the enabling signal is maintained for a first preset time period, namely after the enabling signal is maintained for 2-3 seconds, the controller generates a locking instruction for the oxygen lance traversing trolley so as to lock the oxygen lance traversing trolley.
After the controller controls the frequency converter to output the third power supply voltage so as to control the third preset speed of the oxygen lance traversing carriage driven by the motor to be 0 and simultaneously control the frequency converter to maintain the enabling signal for the first preset time period, the method further comprises the following steps: and controlling the frequency converter to stop working.
When the frequency converter does not need to work, the work of the frequency converter is stopped in time, and energy can be effectively saved.
In this third stage, after the enabling signal of the frequency converter is maintained for a first preset period of time, the method further includes: judging whether converting position information is detected; when converting position information is detected, a locking instruction for the oxygen lance traversing carriage is generated, so that the oxygen lance traversing carriage is locked.
After judging whether converting bit information is detected, the method further comprises the steps of: when converting position information is not detected, controlling the frequency converter to output a reverse second power supply voltage so that the motor drives the oxygen lance traversing carriage to reversely run at a second preset speed; in the reverse running process, if the controller detects converting position information, the controller controls the frequency converter to output a third power supply voltage, keeps an enabling signal of the frequency converter, and generates a locking instruction for the oxygen lance traversing carriage after keeping the second preset time length so as to lock the oxygen lance traversing carriage.
Because the controller does not detect the converting position information, the oxygen gun traversing carriage is determined to exceed the converting position, in order to quickly move the oxygen gun traversing carriage back to the converting position, on one hand, the controller controls the frequency converter to output a second power voltage in the reverse direction so as to enable the motor to drive the oxygen gun traversing carriage to reversely run at a second preset speed, at the moment, the speed is reversely accelerated by 0 speed to reach a low speed, when the controller detects the converting position information again, the controller starts to reduce the speed, the controller controls the frequency converter to output a third power voltage so as to control the motor to drive the third preset speed of the oxygen gun traversing carriage to be 0, and keeps the enabling signal of the frequency converter, and keeps the second preset time of the enabling signal, and then generates a locking instruction for the oxygen gun traversing carriage so as to lock the oxygen gun traversing carriage, at the moment, the oxygen gun traversing carriage moves back to the converting position from the position exceeding the converting position, and further accurate positioning of the oxygen gun traversing carriage is automatically realized.
The controller controls the output of the frequency converter, and the parameters of the frequency converter are set to p554=b3100, p443=k3002, p561=b3103, wherein P554 is a parameter of a start signal of the frequency converter communicating with the PLC, and B3100 refers to a start and stop command transmitted to the frequency converter through the PLC; p443 is the parameter setting of the speed of the frequency converter communicating with the PLC, K3002 is the various speed setting values transmitted to the frequency converter by the PLC; p561 is an enable signal for the inverter to communicate with the PLC, and B3103 is an enable output and stop of the inverter controlled by the PLC.
The method for controlling the oxygen lance traversing carriage provided by the invention comprises the following logic control steps in whole, as shown in fig. 4, and comprises the following steps:
firstly, S401, when the controller receives a signal for automatically changing a gun, S402 is executed, and the frequency converter is controlled to output a first power supply voltage, wherein the frequency of the first power supply voltage is 50Hz, so that the motor operates at a first preset speed; then executing S403, after 6S, the controller obtains the torque of the motor and compares the torque with a first preset torque; then, when detecting that the torque of the motor suddenly changes from 55% -70% of rated torque to 80% -90% of rated torque; executing S404, controlling the frequency converter to output a second power supply voltage, so that the motor is decelerated to a second preset speed; then, executing S405, when the controller detects the converting bit signal, controlling the frequency converter to output a third power supply voltage so as to control a third preset speed of the motor-driven oxygen lance traversing vehicle to be 0, and simultaneously maintaining an enabling signal 2S; then, S406 is executed, after 2S, if the converting signal is still detected, the controller controls the frequency converter to stop working, and at the same time, the running signal is stopped, and the enabling signal is also stopped. If no converting signal is detected after 2s; then S407 is executed, and the controller controls the frequency converter to output a second power supply voltage in the reverse direction until a converting signal is detected; then, S408 is executed, the controller controls the inverter to output a third power voltage to control the third preset speed of the oxygen lance traversing carriage driven by the motor to be 0, so that the speed of the motor is reduced to 0, and meanwhile, the inverter keeps the enabling signal for 1S, and after 1S, the inverter is controlled to stop working, namely, the operation is stopped, and the enabling signal is stopped.
Example two
Based on the same inventive concept, an embodiment of the present invention provides a device for controlling an oxygen lance traversing carriage, as shown in fig. 3, including:
a controller 301, a frequency converter 302, and a motor 303;
the controller 301 is configured to control the frequency converter 302 to output a first power voltage, so as to control the motor 303 to drive the oxygen lance traversing carriage to run in a ratchet rail clamping direction at a first preset speed, where the controller 301 obtains an output torque of the motor 303 as a first output torque;
the controller 301 is configured to, during operation of the oxygen gun traversing carriage, determine that a current second output torque of the motor 303 is greater than the first preset torque, and when a difference between the second output torque and the first preset torque is greater than a preset value, control the frequency converter 302 to output a second power supply voltage, where a frequency of the second power supply voltage is less than a frequency of the first power supply voltage, so that the motor 303 drives the oxygen gun traversing carriage to slow down from the first preset speed to a second preset speed;
the controller 301 is configured to control the frequency converter 302 to output a third power supply voltage when converting position information is detected, so as to control the motor to drive a third preset speed of the oxygen lance traversing carriage to be 0, maintain an enable signal of the frequency converter 302, and generate a locking instruction for the oxygen lance traversing carriage after maintaining the enable signal for a first preset time period, so that the oxygen lance traversing carriage is locked.
In a preferred embodiment, the controller 301 is further configured to determine whether the converting station information is detected after controlling the third power voltage output by the frequency converter 302 to control the third preset speed at which the motor drives the oxygen lance traversing carriage to be 0 and maintaining the enable signal for a first preset period of time; when the converting position information is detected, a locking instruction for the oxygen lance traversing carriage is generated, so that the oxygen lance traversing carriage is locked.
In a preferred embodiment, the controller 301 is further configured to control the frequency converter 302 to output the second power voltage in a reverse direction after determining whether the converting station information is detected or not, so that the motor 303 drives the oxygen lance traversing carriage to operate in a reverse direction at the second preset speed when the converting station information is not detected;
in the reverse running process, if the controller 301 detects the converting position information, the controller 301 is further configured to control the frequency converter 302 to output the third power supply voltage, so as to control the motor to drive the third preset speed of the oxygen lance traversing carriage to be 0, keep the enable signal of the frequency converter 302, and after keeping the second preset time period, generate a locking instruction for the oxygen lance traversing carriage, so that the oxygen lance traversing carriage is locked.
In a preferred embodiment, after the controller 301 is configured to control the inverter 302 to output a third power voltage to control a third preset speed of the motor to drive the oxygen lance traversing carriage to be 0, and maintain the enable signal of the inverter 302, and maintain the enable signal for a first preset period of time, the controller is further configured to: the inverter 302 is controlled to stop working.
In a preferred embodiment, after the controller 301 is configured to control the frequency converter 302 to output a first power voltage, so as to control the motor 303 to drive the oxygen gun traversing carriage to move in a ratchet rail clamping direction at a first preset speed, the controller is further configured to:
judging whether the time period of the motor 303 driving the oxygen lance traversing carriage to move towards the ratchet wheel clamping rail at the first preset speed is longer than the third preset time period or not;
and when the second output torque is greater than the third preset duration, acquiring the current second output torque of the motor 303, and comparing the second output torque with the first torque.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the invention provides a method for controlling an oxygen lance traversing carriage, which is applied to summarizing a device for controlling the oxygen lance traversing carriage, and comprises the following steps: the method comprises the following steps of: the controller controls the frequency converter to output a first power supply voltage to control the motor to drive the oxygen gun traversing carriage to run towards the converting position at a first preset speed, in the running process, when the controller detects that the output torque of the motor meets a first preset range, the controller controls the frequency converter to output a second power supply voltage, the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to decelerate from the first preset speed to the second preset speed, when the controller detects a converting position signal, the controller controls the frequency converter to output a third power supply voltage to control the third preset speed of the motor to drive the oxygen gun traversing carriage to be 0, and keep the enabling signal of the frequency converter, and after keeping the enabling signal for a first preset time, a locking instruction of the oxygen gun traversing carriage is generated, so that the oxygen gun traversing carriage is locked, because before the oxygen gun traversing carriage does not reach the ratchet wheel clamping rail, the motor drives the oxygen gun traversing carriage to run at a high speed through the control of the frequency converter, the running efficiency can be improved, meanwhile, when the oxygen gun traversing carriage reaches the ratchet wheel clamping rail, the speed of the motor drives the oxygen gun traversing carriage is reduced through the control of the frequency converter to run at a low speed, the phenomenon that the oxygen gun traversing carriage is positioned inaccurately due to the fact that the speed is too fast and easily exceeds the converting position is avoided, then, when the converting position signal is detected, the power supply voltage of the frequency converter is controlled to be the third power supply voltage, the third preset speed of the motor drives the oxygen gun traversing carriage is controlled to be 0, the locking of the oxygen gun traversing carriage is carried out after the enabling signal of the frequency converter is maintained for a first preset time period, the phenomenon that the oxygen gun traversing carriage is positioned inaccurately and cannot be stopped stably can be effectively avoided, thereby realizing the accurate positioning of the oxygen lance transverse trolley.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. A method of controlling an oxygen lance traversing carriage, applied to an apparatus for controlling an oxygen lance traversing carriage, the apparatus comprising: the device comprises a controller, a frequency converter and a motor; characterized in that the method comprises:
the controller controls the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the converting position direction at a first preset speed;
when the controller detects that the output torque of the motor meets a first preset range in the running process of the oxygen gun traversing carriage, the controller controls the frequency converter to output a second power supply voltage, and the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to decelerate from the first preset speed to a second preset speed;
when the controller detects converting position information, the controller controls the frequency converter to output a third power supply voltage so as to control a third preset speed of the motor for driving the oxygen lance traversing carriage to be 0, and keeps an enabling signal of the frequency converter, and after the enabling signal is kept for a first preset time length, a locking instruction for the oxygen lance traversing carriage is generated so as to enable the oxygen lance traversing carriage to be locked;
after the controller controls the third power supply voltage output by the frequency converter to control the third preset speed of the oxygen lance traversing carriage driven by the motor to be 0 and keep the enabling signal and maintain the first preset duration, the method further comprises the following steps:
judging whether the converting bit information is detected;
when the converting position information is detected, a locking instruction for the oxygen lance traversing carriage is generated, so that the oxygen lance traversing carriage is locked;
after judging whether the converting bit information is detected, the method further comprises the steps of:
when the converting position information is not detected, controlling the frequency converter to output the reverse second power supply voltage, so that the motor drives the oxygen lance traversing carriage to reversely run at the second preset speed;
in the reverse running process, if the controller detects the converting position information, the controller controls the frequency converter to output the third power supply voltage so as to control the motor to drive a third preset speed of the oxygen gun traversing carriage to be 0, keep an enabling signal of the frequency converter, and generate a locking instruction of the oxygen gun traversing carriage after keeping a second preset time length so as to lock the oxygen gun traversing carriage;
after the controller controls the frequency converter to output the first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to move towards the ratchet wheel clamping rail direction at the first preset speed, the method further comprises the following steps:
the controller judges whether the operation time of the motor driving the oxygen lance traversing carriage to clamp the ratchet wheel at a first preset speed is longer than a third preset time;
and when the current output torque of the motor is greater than the third preset duration, acquiring the current output torque of the motor, and judging whether the current output torque meets the first preset range.
2. The method of claim 1, wherein after the controller controls the frequency converter to output a third power supply voltage to control the motor to drive a third preset speed 0 of the oxygen lance traversing carriage and to maintain an enable signal of the frequency converter for a first preset duration, further comprising:
and controlling the frequency converter to stop working.
3. An apparatus for controlling a transverse oxygen lance carriage, comprising:
the device comprises a controller, a frequency converter and a motor;
the controller is used for controlling the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the ratchet wheel rail clamping direction at a first preset speed, and the controller obtains the output torque of the motor to be a first output torque through the frequency converter;
the controller is used for determining that the current second output torque of the motor is larger than a first preset torque in the running process of the oxygen gun traversing carriage, and controlling the frequency converter to output a second power supply voltage when the difference value between the second output torque and the first preset torque is larger than a preset value, wherein the frequency of the second power supply voltage is smaller than that of the first power supply voltage, so that the motor drives the oxygen gun traversing carriage to be decelerated from the first preset speed to a second preset speed;
the controller is used for controlling the frequency converter to output a third power supply voltage when converting position information is detected, so as to control the motor to drive a third preset speed of the oxygen lance traversing carriage to be 0, keeping an enabling signal of the frequency converter, and after keeping a first preset time length of the enabling signal, generating a locking instruction for the oxygen lance traversing carriage, so that the oxygen lance traversing carriage is locked;
the controller is further used for judging whether the converting position information is detected or not after controlling the third power supply voltage output by the frequency converter to control the third preset speed of the motor for driving the oxygen lance transverse trolley to be 0, keeping an enabling signal and keeping the first preset duration; when the converting position information is detected, a locking instruction for the oxygen lance traversing carriage is generated, so that the oxygen lance traversing carriage is locked;
the controller is further used for controlling the frequency converter to output the reverse second power supply voltage after judging whether the converting position information is detected or not and when the converting position information is not detected, so that the motor drives the oxygen lance traversing carriage to reversely run at the second preset speed;
in the reverse running process, if the controller detects the converting position information, the controller is further configured to control the frequency converter to output the third power supply voltage, so as to control the motor to drive a third preset speed of the oxygen lance traversing carriage to be 0, keep an enabling signal of the frequency converter, and after keeping a second preset time length, generate a locking instruction for the oxygen lance traversing carriage, so that the oxygen lance traversing carriage is locked;
after the controller is used for controlling the frequency converter to output a first power supply voltage so as to control the motor to drive the oxygen lance traversing carriage to run in the ratchet wheel rail clamping direction at a first preset speed, the controller is further used for:
judging whether the time length of the motor driving the oxygen lance traversing carriage to move towards the ratchet wheel clamping rail at a first preset speed is longer than a third preset time length or not;
and when the current output torque of the motor is greater than the third preset duration, acquiring the current output torque of the motor, and judging whether the current output torque meets a first preset range.
4. The apparatus of claim 3, wherein after the controller is configured to control the inverter to output a third power supply voltage to control the motor to drive a third preset speed 0 of the oxygen lance traversing carriage and to maintain an enable signal of the inverter for a first preset duration, the controller is further configured to: and controlling the frequency converter to stop working.
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| CN201910846526.4A CN110703820B (en) | 2019-09-05 | 2019-09-05 | Method and device for controlling oxygen lance transverse trolley |
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| CN115449587B (en) * | 2022-09-15 | 2024-03-19 | 首钢京唐钢铁联合有限责任公司 | Parking control method and system for converter oxygen lance traversing device |
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