CN110684879A - Method and device for preventing oxygen lance from falling - Google Patents
Method and device for preventing oxygen lance from falling Download PDFInfo
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- CN110684879A CN110684879A CN201911034924.2A CN201911034924A CN110684879A CN 110684879 A CN110684879 A CN 110684879A CN 201911034924 A CN201911034924 A CN 201911034924A CN 110684879 A CN110684879 A CN 110684879A
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- frequency converter
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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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- 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
- C21C5/30—Regulating or controlling the blowing
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of metallurgy, in particular to a method and a device for preventing an oxygen lance from falling, wherein the method comprises the following steps: detecting whether the oxygen lance is positioned at a working position; when the oxygen lance is positioned at the working position, acquiring the state information of a frequency converter, the state information of a brake and the speed information of a motor detected by a speed encoder; based on the state information of the frequency converter, when the frequency converter is determined to be in a stop working state, and based on the state information of the brake, when the frequency converter is determined to receive an opening limit signal but not receive a closing limit signal of the brake, and based on the speed information of the motor detected by the speed encoder, when the speed of the motor is determined to be not 0, the frequency converter is controlled to start and operate, so that the brake is controlled to be closed and the closing limit signal is returned, thereby avoiding the occurrence of cavity falling accidents caused by human errors, further reducing the equipment failure rate, reducing the damage probability of oxygen lance equipment, reducing the failure processing time and ensuring the production continuity.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method and a device for preventing an oxygen lance from falling.
Background
The oxygen lance device of the steelmaking converter is one of the most main on-line devices in a steelmaking workshop, and the oxygen lance falls in the production process, so that the device is greatly damaged, and more importantly, once the oxygen lance falls into the device, the device is difficult to recover in a short time, so that the continuous and stable production of steelmaking is greatly influenced, and particularly, the yield is reduced.
The condition that the oxygen lance falls comprises that the oxygen lance brake is operated by mistake on site to directly pull the brake rod, or the brake fails, so that the brake is opened, and the oxygen lance accident can be directly caused.
Therefore, how to effectively avoid the oxygen lance falling accident is a technical problem to be solved urgently at present.
Disclosure of Invention
In view of the above, the present invention has been made to provide a method and apparatus for preventing lance fall that overcomes or at least partially solves the above problems.
In a first aspect, the invention provides a method for preventing an oxygen lance from falling, which is applied to an oxygen lance lifting control device, the oxygen lance lifting control device comprises a frequency converter, a brake, a speed encoder and a motor for driving the oxygen lance to lift, wherein the frequency converter is used for driving the motor to rotate, the brake is used for braking the motor, the speed encoder is used for detecting speed information of the motor, and the method comprises the following steps:
detecting whether the oxygen lance is located at a working position, wherein the working position is specifically a position at which the oxygen lance is controlled to ascend and descend;
when the oxygen lance is positioned at the working position, acquiring the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder;
and controlling the frequency converter to start running to control the brake to be closed and return to an off limit signal when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and when the frequency converter is determined to receive the on limit signal but not the off limit signal of the brake based on the state information of the brake and the speed of the motor is determined to be not 0 based on the speed information of the motor detected by the speed encoder.
Further, before the controlling the frequency converter to start operation to control the brake to close and return to the close limit signal, the method further includes:
detecting whether the frequency converter has a fault;
and when the frequency converter is detected to have a fault, automatically resetting the fault of the frequency converter.
Further, when it is determined that the frequency converter is in a stop state based on the state information of the frequency converter and when it is determined that the frequency converter receives the open limit signal but does not receive the close limit signal of the brake based on the state information of the brake, and when it is determined that the speed of the motor is not 0 based on the speed of the motor detected by the speed encoder, the method further includes:
and controlling an alarm device to give an alarm.
Further, the controlling the frequency converter to start operation to control the brake to close and return to a closing limit signal specifically includes:
and controlling the frequency converter to start and operate, so that the output frequency of the frequency converter is 0, and controlling the brake to be closed and returning to an off limit signal.
Further, after the controlling the frequency converter to start operation to control the brake to close and return to the close limit signal, the method further includes:
and controlling the frequency converter to stop outputting.
Further, after the controlling the frequency converter to stop outputting, the method further includes:
and restoring the frequency converter to a manual reset fault state.
In a second aspect, the invention further provides a device for preventing the oxygen lance from falling, the device comprises a frequency converter, a brake, a speed encoder and a motor for driving the oxygen lance to ascend and descend, wherein the frequency converter is used for driving the motor to rotate, the brake is used for braking the motor, the speed encoder is used for detecting the speed information of the motor, and the device further comprises:
the first detection module is used for detecting whether the oxygen lance is located at a working position, wherein the working position is specifically a position at which the oxygen lance can be controlled to lift;
the acquisition module is used for acquiring the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder when the oxygen lance is positioned at the working position;
and the control module is used for controlling the frequency converter to start running to control the brake to be closed and return to an off limit signal when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and when the frequency converter is determined to receive the on limit signal but not the off limit signal of the brake based on the state information of the brake and the speed of the motor detected by the speed encoder is determined to be not 0 based on the speed of the motor.
Further, still include:
the second detection module is used for detecting whether the frequency converter has a fault;
and the resetting module is used for automatically resetting the frequency converter when the frequency converter is detected to have a fault.
Further, the control module is specifically configured to:
when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and the state information of the brake, the frequency converter is determined to receive an opening limit signal but not an closing limit signal of the brake, and when the speed of the motor is determined to be not 0 based on the speed detected by the speed encoder, the frequency converter is controlled to start running, the output frequency of the frequency converter is made to be 0, and the brake is controlled to be closed and return to the closing limit signal.
In a third aspect, the invention provides a computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, performs the above-mentioned method steps.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a method for preventing an oxygen lance from falling, which is applied to an oxygen lance lifting control device, wherein the oxygen lance lifting control device comprises a frequency converter, a brake, a speed frequency converter and a motor for driving the oxygen lance to lift, the frequency converter is used for driving the motor to rotate, the brake is used for braking the motor, and a speed encoder is used for detecting the speed information of an electrode, and the method specifically comprises the following steps: when the oxygen lance is detected to be positioned at the working position, the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder are obtained, and then, based on the state information of the frequency converter, when the frequency converter is determined to be in the stop working state and the frequency converter receives the opening limiting signal but does not receive the closing limiting signal of the brake based on the state information of the brake, and based on the speed of the motor detected by the speed encoder, when the speed of the motor is determined to be not 0, the frequency converter is controlled to start to operate, so as to control the brake to close and return to a closing limit signal, thereby avoiding the occurrence of chamber falling accidents caused by human errors, further, the failure rate of the equipment can be reduced, the damage probability of the oxygen lance equipment is reduced, the processing time of the failure can be reduced, the continuity of production is ensured, and the degree of automatic control is improved.
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, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic flow chart illustrating the steps of a method for preventing oxygen lance fall in an embodiment of the present invention;
FIG. 2 shows a schematic structural diagram of a device for preventing oxygen lance from falling in the embodiment of the 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.
Example one
The embodiment of the invention provides a method for preventing an oxygen lance from falling, which is applied to an oxygen lance lifting control device, and the oxygen lance lifting control device comprises: the device comprises a frequency converter, a brake, a speed encoder and a motor for driving the oxygen lance to ascend and descend, wherein the frequency converter is used for driving the motor to rotate, the brake is used for braking the motor, and the speed encoder is used for detecting the speed information of the motor. The oxygen lance lifting control device also comprises a controller, and the controller is connected with the frequency converter, the brake and the speed encoder. The execution subject of the method provided by the invention is the controller.
In a steelmaking converter and a refining system, in order to protect a lance body in a blowing process, the oxygen lance lifting control device is required to be arranged and used for placing the oxygen lance in the converter or lifting the oxygen lance out of the converter.
As shown in fig. 1, the method includes:
s101, detecting whether the oxygen lance is located at a working position, wherein the working position is specifically a position at which the oxygen lance is controlled to ascend and descend;
s102, when the oxygen lance is positioned at the working position, acquiring state information of a frequency converter, state information of a brake and speed information of a motor detected by a speed encoder;
s103, based on the state information of the frequency converter, when the frequency converter is determined to be in a stop working state and based on the state information of the brake, the frequency converter is determined to receive an opening limit signal but not an closing limit signal of the brake, and based on the speed of the motor detected by the speed encoder, the frequency converter is controlled to start running so as to control the brake to be closed and return to a closing limit signal when the speed of the motor is determined to be not 0.
The execution main body of the method for preventing the oxygen lance from falling is specifically a controller, and the controller can be specifically any one of a Programmable Logic Controller (PLC), a Field Programmable Gate Array (FPGA) controller and a single chip microcomputer.
In S101, whether the oxygen lance is located at a working position is detected, and the working position is specifically the position at which the oxygen lance is controlled to ascend and descend. Only when the oxygen lance is positioned on the working position can the normal or abnormal control operation be executed.
S102, when the oxygen lance is positioned at the working position, acquiring the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder.
Specifically, both the frequency converter and the brake can actively feed current state information back to the controller, and meanwhile, the speed encoder can also feed back currently detected speed information of the motor in real time, and the motor is used for driving the oxygen lance to run.
In the conventional control process, namely when the condition that the oxygen lance can fall off does not occur, the specific control process of the oxygen lance lifting control device is as follows:
and controlling and collecting the state information of the frequency converter, wherein when the state information of the frequency converter is in a stop state, the frequency converter is in a closing state, namely a rectifying part of the frequency converter is closed, and an inverting part of the frequency converter does not output the state information.
And then, the controller controls the frequency converter to start and operate, namely the inverter part of the frequency converter outputs, so that the motor starts and operates, and the oxygen lance is controlled to lift.
Then, the controller controls the frequency converter to output preset frequency, when the output torque of the frequency converter reaches 45% of the rated torque, the frequency converter controls the brake to be opened, the brake feeds back an opening limit signal to control, and the motor continues to run.
Then, in the running process of the motor, when the controller controls the output frequency of the frequency converter to be 0, the frequency of the frequency converter is gradually reduced to 2.5Hz from the current frequency, the frequency converter can control the brake to be closed, so that the brake feeds back an off limit signal to the controller, finally, the frequency converter stops working, the motor stops running, and meanwhile, the value of the speed encoder is equal to 0. The speed encoder is positioned at the rotating shaft of the motor, and can acquire the speed of the motor in real time.
It can be seen that the oxygen lance does not risk falling during the conventional control process.
However, when the oxygen lance is in a risk of falling, the oxygen lance is determined to be in a risk of falling because the obtained state of the frequency converter, the state of the brake and the speed information of the motor detected by the speed encoder are different from the state of the frequency converter brake and the speed information of the motor detected by the speed encoder obtained in the conventional control process.
Specifically, when the frequency converter is determined to be in the stop state based on the information obtained in S102, that is, based on the state information of the frequency converter, and when the open limit signal of the brake received by the frequency converter is determined but the close limit signal is not received based on the state information of the brake, and when the speed of the motor is determined to be not 0 based on the speed information of the motor detected by the speed encoder, the oxygen lance risks falling. For this case, the operations to be executed are specifically:
and controlling the frequency converter to start running so as to control the brake to be closed and return to an off limit signal.
In a specific embodiment, the brake off limit signal is not returned because the brake on limit signal is returned, but the brake off limit signal is not returned, which indicates that the brake may be the manual lever being pulled or the brake failing to close.
Meanwhile, the oxygen lance runs downwards under the action of self gravity, namely the oxygen lance drives the motor to run, so that the speed detected by the speed encoder on the rotating shaft of the motor is not equal to 0.
Thus, the oxygen lance is determined to have the risk of falling.
Specifically, the frequency converter is controlled to start running, so that the output frequency of the frequency converter is 0, the brake is controlled to be closed, and an off limit signal is returned.
The output frequency of the frequency converter is made to be 0, specifically, the frequency converter is made to output direct-current voltage. Thereby enabling the brake to close and return an off limit signal.
In a specific embodiment, before S103, that is, before controlling the frequency converter to start running to control the brake to close and return to the close limit signal, the method further includes:
detecting whether the frequency converter has a fault;
and when the frequency converter is detected to have a fault, automatically resetting the fault of the frequency converter.
When the frequency converter has a fault, please directly ignore the fault, and overcome the current gun falling risk. Therefore, the automatic reset function of the frequency converter is started, and when the frequency converter is detected to have a fault, the fault of the frequency converter can be directly reset.
In order to remind the user that there may be a risk of the chamber crash at present while the above-mentioned S103 is executed, the method further includes: and controlling an alarm device to alarm for warning the user.
After S103, the method further comprises controlling the frequency converter to stop outputting, and then restoring the frequency converter to a manual reset fault state.
Because the fault state is automatically reset before the frequency converter is executed in S103, the frequency converter is required to be ensured not to be in fault and can be started to operate, and after the S103 is executed, the condition that the oxygen lance falls into the lance cannot exist, so that the state of the frequency converter is required to be recovered to the manual reset fault state, namely, when the frequency converter is in fault, the fault can be timely solved.
In summary, in the invention, when the oxygen lance is located at the working position, that is, when the oxygen lance feeds back a signal currently located at the working position to the controller, the controller detects and obtains the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder, when the controller detects that the frequency converter is currently in the stop working state, the brake returns to the on limit signal and does not return to the off limit signal, and when the speed of the motor detected by the speed encoder is not 0, the controller immediately controls the frequency converter to be on, the output frequency is 0, so that the brake is turned off and returns to the off limit signal, and finally, the frequency converter is controlled to stop outputting, thereby preventing the oxygen lance falling accident.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a method for preventing an oxygen lance from falling, which is applied to an oxygen lance lifting control device, wherein the oxygen lance lifting control device comprises a frequency converter, a brake, a speed frequency converter and a motor for driving the oxygen lance to lift, the frequency converter is used for driving the motor to rotate, the brake is used for braking the motor, and a speed encoder is used for detecting the speed information of an electrode, and the method specifically comprises the following steps: when the oxygen lance is detected to be positioned at the working position, the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder are obtained, and then, based on the state information of the frequency converter, when the frequency converter is determined to be in the stop working state and the frequency converter receives the opening limiting signal but does not receive the closing limiting signal of the brake based on the state information of the brake, and based on the speed of the motor detected by the speed encoder, when the speed of the motor is determined to be not 0, the frequency converter is controlled to start to operate, so as to control the brake to close and return to a closing limit signal, thereby avoiding the occurrence of chamber falling accidents caused by human errors, further, the failure rate of the equipment can be reduced, the damage probability of the oxygen lance equipment is reduced, the processing time of the failure can be reduced, the continuity of production is ensured, and the degree of automatic control is improved.
Example two
Based on the same inventive concept, the embodiment of the invention also provides a device for preventing the oxygen lance from falling, which comprises: the utility model provides a frequency converter, stopper, speed encoder and the motor that drives oxygen rifle lift, wherein, the frequency converter is used for driving the motor rotates, the stopper is used for braking the motor, speed encoder is used for detecting the speed information of motor, as shown in figure 2, still includes:
the first detection module is used for detecting whether the oxygen lance is located at a working position, wherein the working position is specifically a position at which the oxygen lance can be controlled to lift;
the acquisition module is used for acquiring the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder when the oxygen lance is positioned at the working position;
and the control module is used for controlling the frequency converter to start running to control the brake to be closed and return to an off limit signal when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and when the frequency converter is determined to receive the on limit signal but not the off limit signal of the brake based on the state information of the brake and the speed of the motor detected by the speed encoder is determined to be not 0 based on the speed of the motor.
In a preferred embodiment, the method further comprises:
the second detection module is used for detecting whether the frequency converter has a fault;
and the resetting module is used for automatically resetting the frequency converter when the frequency converter is detected to have a fault.
In a preferred embodiment, the method further comprises:
and the alarm module is used for controlling the alarm device to give an alarm.
In a preferred embodiment, the method further comprises:
and the recovery module is used for recovering the frequency converter to a manual reset fault state.
In a preferred embodiment, the control module is specifically configured to: when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and the state information of the brake, the frequency converter is determined to receive an opening limit signal but not an closing limit signal of the brake, and when the speed of the motor is determined to be not 0 based on the speed detected by the speed encoder, the frequency converter is controlled to start running, so that the output frequency of the frequency converter is 0, the brake is controlled to be closed, and the closing limit signal is returned.
EXAMPLE III
Based on the same inventive concept, a third embodiment of the present invention provides a computer-readable storage medium, having a computer program stored thereon, which when executed by a processor, performs the above-described method steps for preventing oxygen lance from falling.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of an apparatus, server, etc. for intelligent scheduling according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. The method for preventing the oxygen lance from falling is applied to an oxygen lance lifting control device, the oxygen lance lifting control device comprises a frequency converter, a brake, a speed encoder and a motor for driving the oxygen lance to lift, wherein the frequency converter is used for driving the motor to rotate, the brake is used for braking the motor, and the speed encoder is used for detecting the speed information of the motor, and the method is characterized by comprising the following steps:
detecting whether the oxygen lance is located at a working position, wherein the working position is specifically a position at which the oxygen lance is controlled to ascend and descend;
when the oxygen lance is positioned at the working position, acquiring the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder;
and controlling the frequency converter to start running to control the brake to be closed and return to an off limit signal when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and when the frequency converter is determined to receive the on limit signal but not the off limit signal of the brake based on the state information of the brake and the speed of the motor is determined to be not 0 based on the speed information of the motor detected by the speed encoder.
2. The method of claim 1, prior to said controlling said inverter to initiate operation to control said brake to close and return to an off limit signal, further comprising:
detecting whether the frequency converter has a fault;
and when the frequency converter is detected to have a fault, automatically resetting the fault of the frequency converter.
3. The method of claim 1, wherein when it is determined that the inverter receives the open limit signal but does not receive the close limit signal of the brake based on the state information of the inverter when it is determined that the inverter is in the stop state and based on the state information of the brake, and when it is determined that the speed of the motor is not 0 based on the speed of the motor detected by the speed encoder, further comprising:
and controlling an alarm device to give an alarm.
4. The method according to claim 1, wherein the controlling the frequency converter to start operation to control the brake to close and return to an off limit signal comprises:
and controlling the frequency converter to start and operate, so that the output frequency of the frequency converter is 0, and controlling the brake to be closed and returning to an off limit signal.
5. The method of claim 1, wherein after said controlling said inverter to initiate operation to control said brake to close and return to an off limit signal, further comprising:
and controlling the frequency converter to stop outputting.
6. The method of claim 5, after said controlling the frequency converter to stop outputting, further comprising:
and restoring the frequency converter to a manual reset fault state.
7. The utility model provides a prevent device that oxygen rifle falls, the device includes converter, stopper, speed encoder and the motor that drives the oxygen rifle and go up and down, wherein, the converter is used for driving the motor rotates, the stopper is used for braking the motor, speed encoder is used for detecting the speed information of motor, its characterized in that still includes:
the first detection module is used for detecting whether the oxygen lance is located at a working position, wherein the working position is specifically a position at which the oxygen lance can be controlled to lift;
the acquisition module is used for acquiring the state information of the frequency converter, the state information of the brake and the speed information of the motor detected by the speed encoder when the oxygen lance is positioned at the working position;
and the control module is used for controlling the frequency converter to start running to control the brake to be closed and return to an off limit signal when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and when the frequency converter is determined to receive the on limit signal but not the off limit signal of the brake based on the state information of the brake and the speed of the motor detected by the speed encoder is determined to be not 0 based on the speed of the motor.
8. The apparatus of claim 7, further comprising:
the second detection module is used for detecting whether the frequency converter has a fault;
and the resetting module is used for automatically resetting the frequency converter when the frequency converter is detected to have a fault.
9. The apparatus of claim 7, wherein the control module is specifically configured to:
when the frequency converter is determined to be in a stop working state based on the state information of the frequency converter and the state information of the brake, the frequency converter is determined to receive an opening limit signal but not an closing limit signal of the brake, and when the speed of the motor is determined to be not 0 based on the speed detected by the speed encoder, the frequency converter is controlled to start running, the output frequency of the frequency converter is made to be 0, and the brake is controlled to be closed and return to the closing limit signal.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 6.
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| CN201911034924.2A CN110684879A (en) | 2019-10-29 | 2019-10-29 | Method and device for preventing oxygen lance from falling |
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| CN201911034924.2A CN110684879A (en) | 2019-10-29 | 2019-10-29 | Method and device for preventing oxygen lance from falling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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