CN111471835A - RH furnace ladle lifting control method and system - Google Patents
RH furnace ladle lifting control method and system Download PDFInfo
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- CN111471835A CN111471835A CN202010282927.4A CN202010282927A CN111471835A CN 111471835 A CN111471835 A CN 111471835A CN 202010282927 A CN202010282927 A CN 202010282927A CN 111471835 A CN111471835 A CN 111471835A
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- ladle
- jacking
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C17/00—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports
- B66C17/06—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes
- B66C17/10—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes for transporting ladles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a system for controlling lifting of a ladle of an RH furnace, which comprises: the steel ladle clearance measuring device is used for measuring a clearance value of the steel ladle; the ladle jacking device is used for supporting the ladle car where the ladle is positioned; the hydraulic device is used for driving the ladle jacking device to jack the ladle car and the ladle; the displacement sensor is used for acquiring the jacking height value of the steel ladle in real time; and the control device is used for receiving the clearance value measured by the steel ladle clearance measuring device and the jacking height value acquired by the displacement sensor, and sending a jacking start-stop signal to the hydraulic device according to the clearance value and the jacking height value so as to control the start and stop of the steel ladle. The problem of the ladle in the great error of dip pipe immersion depth is solved, for current through the operation of artificial experience, promoted the accuracy nature of control greatly, and realized automated control, improved production efficiency.
Description
Technical Field
The invention relates to the technical field of refining processes in the metallurgical industry, in particular to a method and a system for controlling lifting of a ladle of an RH furnace.
Background
The RH furnace is one of the main devices for external refining, and the main production flow of the RH furnace is as follows: the ladle car transports the ladle to a treatment station at a ladle hanging station, the ladle car and the ladle are lifted to a treatment position by a hydraulic system, and then molten steel vacuum treatment is carried out, wherein the treatment comprises forced decarburization, secondary combustion, chemical temperature rise, final deoxidation, alloy fine adjustment and the like. After the molten steel is processed, the ladle car and the ladle are descended to the transportation track by the hydraulic system, and finally the ladle car transports the ladle to a ladle hanging station for the next procedure.
At present, the ladle lifting mode of the RH furnace is a manual control mode, and the specific control mode is as follows: when the ladle car reaches a processing station, an operator manually controls to lift the hydraulic jacking platform, when the lower edge of the dip pipe of the vacuum chamber contacts with slag surface, the lifting height is manually reset, then the ladle is continuously lifted, and when the dip pipe is immersed into molten steel for 500 mm, the lifting is stopped. In the whole treatment process, an operator is required to observe the immersion depth condition of the dip pipe at any time and manually control the hydraulic jacking platform, so that the problem of large immersion depth error of the dip pipe exists.
Disclosure of Invention
The embodiment of the application provides a method and a system for controlling the lifting of a ladle of an RH furnace, and solves the technical problem that the dip pipe immersion depth error is large after the existing RH furnace ladle is lifted.
On one hand, the present application provides the following technical solutions through an embodiment of the present application:
a method of RH furnace ladle lift control, the system comprising: the device comprises a steel ladle clearance measuring device, a hydraulic device, a steel ladle jacking device, a displacement sensor and a control device; wherein,
the steel ladle clearance measuring device is used for measuring a clearance value of the steel ladle;
the ladle jacking device is used for supporting the ladle car where the ladle is positioned;
the hydraulic device is used for driving the ladle jacking device to jack the ladle car and the ladle;
the displacement sensor is used for acquiring the jacking height value of the steel ladle in real time;
and the control device is used for receiving the clearance value measured by the steel ladle clearance measuring device and the jacking height value acquired by the displacement sensor, and sending a jacking start-stop signal to the hydraulic device according to the clearance value and the jacking height value so as to control the start and stop of the steel ladle.
Optionally, the steel ladle clearance measuring device is an ultrasonic distance meter or a laser distance meter.
Optionally, the hydraulic apparatus specifically includes: the hydraulic control system comprises a hydraulic oil tank, an electromagnetic valve group, a proportional electromagnetic valve, a hydraulic pump, an alternating current motor, a hydraulic cylinder and a filter.
Optionally, the ladle jacking device receives the hydraulic cylinder and the ladle car, and the hydraulic cylinder jacks the ladle car and the ladle through the ladle jacking device.
Optionally, the control device is specifically configured to:
according to clearance value h measured by the steel ladle clearance measuring device1Obtaining the target lifting height h of the ladle2。
Optionally, the control device is further specifically configured to:
calculating and obtaining the target lifting height h of the ladle according to the following formula2：
h2＝h1+h4+500
Wherein h is4And jacking the vertical distance between the lower edge of the corresponding dip pipe and the edge of the steel ladle.
Optionally, the control device is further specifically configured to:
according to the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2Sending a jacking stop signal to the hydraulic device to control the ladleIs stopped.
Optionally, the control device is further specifically configured to:
judging the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2The relative relationship of (a);
when the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2And if so, sending a jacking stop signal to the hydraulic device to control the stopping of the ladle.
In another aspect, the present application provides a method for RH furnace ladle lifting control by another embodiment of the present application, the method being implemented based on the above system, the method including:
utilizing the steel ladle clearance measuring device to measure and obtain the clearance value h of the steel ladle1；
The control device receives the clear value h1And according to clearance value h measured by the steel ladle clearance measuring device1Obtaining the target lifting height h of the ladle2And sending a jacking starting signal to the hydraulic device;
the hydraulic device receives the jacking starting signal and drives the ladle jacking device to jack the ladle car and the ladle to ascend;
in the process of lifting the ladle car and the ladle, the displacement sensor collects the jacking height value h of the ladle in real time3；
The control device receives the jacking height value h of the ladle3And according to the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2Sending a jacking stop signal to the hydraulic device;
and the hydraulic device receives the jacking stop signal, stops the ladle jacking device from jacking the ladle car and lifting the ladle, and stops the ladle at the ladle target lifting height position.
Optionally, obtaining the target lifting height of the ladle according to the clearance value measured by the ladle clearance measuring device specifically includes:
calculating and obtaining the target lifting height h of the ladle according to the following formula2：
h2＝h1+h4+500
Wherein h is4And jacking the vertical distance between the lower edge of the corresponding dip pipe and the edge of the steel ladle.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
accessible ladle headroom measuring device measures the headroom value of ladle, ladle jacking device bearing the buggy ladle at ladle place, hydraulic means drive ladle jacking device jacking buggy ladle and ladle, displacement sensor gathers in real time the jacking height value of ladle, controlling means receives the measured headroom value of ladle headroom measuring device with the jacking height value that displacement sensor gathered, and basis headroom value and jacking height value, to hydraulic means sends the jacking and opens the stop signal, in order to control opening of ladle stops. Therefore, the relative distance between the steel ladle and the dip pipe when the steel ladle stops is accurately controlled through accurate measurement data, the problem that the dip depth error of the steel ladle in the dip pipe is large is solved, compared with the existing operation through manual experience, the control accuracy is greatly improved, automatic control is realized, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a block diagram of the RH furnace ladle lift control system in one embodiment of the present invention;
fig. 2 is a flow chart of a method of RH furnace ladle lift control in one embodiment of the invention.
Detailed Description
The embodiment of the application provides a method and a system for controlling the lifting of a ladle of an RH furnace, and solves the technical problem that the dip pipe immersion depth error is large after the ladle of the RH furnace is lifted in the prior art.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a system for RH furnace ladle lift control, the system comprising: the device comprises a steel ladle clearance measuring device, a hydraulic device, a steel ladle jacking device, a displacement sensor and a control device; the steel ladle clearance measuring device is used for measuring a clearance value of the steel ladle; the ladle jacking device is used for supporting the ladle car where the ladle is positioned; the hydraulic device is used for driving the ladle jacking device to jack the ladle car and the ladle; the displacement sensor is used for acquiring the jacking height value of the steel ladle in real time; and the control device is used for receiving the clearance value measured by the steel ladle clearance measuring device and the jacking height value acquired by the displacement sensor, and sending a jacking start-stop signal to the hydraulic device according to the clearance value and the jacking height value so as to control the start and stop of the steel ladle.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example one
In the present embodiment, there is provided a system for controlling lifting of a ladle of an RH furnace, referring to fig. 1, the system including: the device comprises a steel ladle clearance measuring device, a hydraulic device, a steel ladle jacking device, a displacement sensor and a control device;
wherein,
the steel ladle clearance measuring device is used for measuring a clearance value of the steel ladle;
the ladle jacking device is used for supporting the ladle car where the ladle is positioned;
the hydraulic device is used for driving the ladle jacking device to jack the ladle car and the ladle;
the displacement sensor is used for acquiring the jacking height value of the steel ladle in real time;
and the control device is used for receiving the clearance value measured by the steel ladle clearance measuring device and the jacking height value acquired by the displacement sensor, and sending a jacking start-stop signal to the hydraulic device according to the clearance value and the jacking height value so as to control the start and stop of the steel ladle.
In specific implementation, the control device is respectively in communication connection with the steel ladle clearance detection device, the hydraulic device and the displacement sensor; the hydraulic device is mechanically connected with the ladle jacking device, and the ladle jacking device is connected with the displacement sensor, so that the displacement sensor can acquire and obtain a jacking height value in real time.
As an alternative embodiment, in order to obtain an accurate clearance value of the ladle for precise control of ladle lifting, the ladle clearance measuring device is an ultrasonic distance meter or a laser distance meter. Ultrasonic range finders and laser range finders can be accurate to the centimeter level and the millimeter level. In specific implementation, the ultrasonic distance meter or the laser distance meter can be arranged right below the steel ladle treatment station.
As an alternative embodiment, a specific structure of the hydraulic apparatus includes: the hydraulic control system comprises a hydraulic oil tank, an electromagnetic valve group, a proportional electromagnetic valve, a hydraulic pump, an alternating current motor, a hydraulic cylinder and a filter.
Specifically, the hydraulic cylinder and the ladle car are received by the ladle jacking device, and the hydraulic cylinder jacks the ladle car and the ladle through the ladle jacking device.
The control device, namely a controller, such as P L C, a microprocessor, a computer and the like, is used as a control center of the system, and is used for receiving the clearance value measured by the ladle clearance measuring device and the jacking height value acquired by the displacement sensor, and sending a jacking start-stop signal to the hydraulic device according to the clearance value and the jacking height value so as to control the start and stop of the ladle.
As an optional embodiment, the control device is specifically configured to:
according to clearance value h measured by the steel ladle clearance measuring device1Obtaining the target lifting height h of the ladle2。
Specifically, the ladle target lifting height h is calculated and obtained according to the following formula2：
h2＝h1+h4+500
Wherein h is4And jacking the vertical distance between the lower edge of the corresponding dip pipe and the edge of the steel ladle. In the specific implementation, h4Can be obtained by measurement according to actual working conditions.
As an optional embodiment, the control device is further specifically configured to:
according to the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2And sending a jacking stop signal to the hydraulic device to control the stopping of the ladle.
Specifically, the jacking height value h acquired by the displacement sensor in real time is judged3And the ladle target lifting height h2The relative relationship of (a); when the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2And if so, sending a jacking stop signal to the hydraulic device to control the stopping of the ladle.
Therefore, under the control command of the control device, each actuating mechanism can completely realize automatic operation, the manual operation steps of operators are reduced, the production efficiency is improved, the safety of the system is improved, and the control device has high control precision and strong reliability.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
accessible ladle headroom measuring device measures the headroom value of ladle, ladle jacking device bearing the buggy ladle at ladle place, hydraulic means drive ladle jacking device jacking buggy ladle and ladle, displacement sensor gathers in real time the jacking height value of ladle, controlling means receives the measured headroom value of ladle headroom measuring device with the jacking height value that displacement sensor gathered, and basis headroom value and jacking height value, to hydraulic means sends the jacking and opens the stop signal, in order to control opening of ladle stops. Therefore, the relative distance between the steel ladle and the dip pipe when the steel ladle stops is accurately controlled through accurate measurement data, the problem that the dip depth error of the steel ladle in the dip pipe is large is solved, compared with the existing operation through manual experience, the control accuracy is greatly improved, automatic control is realized, and the production efficiency is improved.
Example two
Based on the same inventive concept as the first embodiment, the present embodiment provides a method for controlling ladle lifting of an RH furnace, where the method is implemented based on the system of the first embodiment, and the method includes:
s101, utilizing the steel ladle clearance measuring device to measure and obtain a clearance value h of the steel ladle1；
S102, the control device receives the clear space value h1And according to clearance value h measured by the steel ladle clearance measuring device1Obtaining the target lifting height h of the ladle2And sending a jacking starting signal to the hydraulic device;
s103, the hydraulic device receives the jacking starting signal and drives the ladle jacking device to jack the ladle car and the ladle to ascend;
s104, in the process of lifting the ladle car and the ladle, the displacement sensor collects the jacking height value h of the ladle in real time3；
S105, the control device receives the jacking height value h of the ladle3And according to the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2Sending a jacking stop signal to the hydraulic device;
and S106, the hydraulic device receives the jacking stop signal, stops the ladle jacking device from jacking the ladle car and lifting the ladle, and stops the ladle at the ladle target lifting height position.
As an alternative to applying water-proofing, according to
The clearance value measured by the steel ladle clearance measuring device is used for obtaining the steel ladle target lifting height, and the method specifically comprises the following steps:
calculating and obtaining the target lifting height h of the ladle according to the following formula2：
h2＝h1+h4+500
Wherein h is4And jacking the vertical distance between the lower edge of the corresponding dip pipe and the edge of the steel ladle.
Since the method for controlling lifting of a ladle of an RH furnace described in this embodiment is implemented by a system for controlling lifting of a ladle of an RH furnace in the first embodiment of the present application, a specific implementation manner of the method of this embodiment and various variations thereof can be known to those skilled in the art based on the system for controlling lifting of a ladle of an RH furnace described in the first embodiment of the present application, and therefore, how to implement the system in the first embodiment of the present application is not described in detail herein. So long as the method implemented by the system based on the RH furnace ladle lifting control in the embodiment of the present application is within the protection scope of the present application.
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. Therefore, it is intended that the appended claims be interpreted as including 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 changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A system for RH furnace ladle lift control, the system comprising: the device comprises a steel ladle clearance measuring device, a hydraulic device, a steel ladle jacking device, a displacement sensor and a control device; wherein,
the steel ladle clearance measuring device is used for measuring a clearance value of the steel ladle;
the ladle jacking device is used for supporting the ladle car where the ladle is positioned;
the hydraulic device is used for driving the ladle jacking device to jack the ladle car and the ladle;
the displacement sensor is used for acquiring the jacking height value of the steel ladle in real time;
and the control device is used for receiving the clearance value measured by the steel ladle clearance measuring device and the jacking height value acquired by the displacement sensor, and sending a jacking start-stop signal to the hydraulic device according to the clearance value and the jacking height value so as to control the start and stop of the steel ladle.
2. The system of claim 1, wherein the ladle clearance measuring device is an ultrasonic range finder or a laser range finder.
3. The system according to claim 2, characterized in that said hydraulic means, in particular, comprise: the hydraulic control system comprises a hydraulic oil tank, an electromagnetic valve group, a proportional electromagnetic valve, a hydraulic pump, an alternating current motor, a hydraulic cylinder and a filter.
4. The system of claim 3, wherein the ladle jacking device receives the hydraulic cylinder and the ladle car, and the hydraulic cylinder jacks the ladle car and the ladle through jacking the ladle jacking device.
5. The system of claim 1, wherein the control device is specifically configured to:
according to clearance value h measured by the steel ladle clearance measuring device1Obtaining the target lifting height h of the ladle2。
6. The system of claim 5, wherein the control device is further specifically configured to:
calculating and obtaining the target lifting height h of the ladle according to the following formula2：
h2＝h1+h4+500
Wherein h is4And jacking the vertical distance between the lower edge of the corresponding dip pipe and the edge of the steel ladle.
7. The system of claim 5, wherein the control device is further specifically configured to:
according to the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2And sending a jacking stop signal to the hydraulic device to control the stopping of the ladle.
8. The system of claim 7, wherein the control device is further specifically configured to:
judging the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2The relative relationship of (a);
when the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2And if so, sending a jacking stop signal to the hydraulic device to control the stopping of the ladle.
9. A method for RH furnace ladle lifting control, characterized in that the method is implemented based on the system according to any of claims 1-8, the method comprising:
utilizing the steel ladle clearance measuring device to measure and obtain the clearance value h of the steel ladle1；
The control device receives the clear value h1And according to clearance value h measured by the steel ladle clearance measuring device1Obtaining said ladle target liftDegree h2And sending a jacking starting signal to the hydraulic device;
the hydraulic device receives the jacking starting signal and drives the ladle jacking device to jack the ladle car and the ladle to ascend;
in the process of lifting the ladle car and the ladle, the displacement sensor collects the jacking height value h of the ladle in real time3；
The control device receives the jacking height value h of the ladle3And according to the jacking height value h acquired by the displacement sensor in real time3And the ladle target lifting height h2Sending a jacking stop signal to the hydraulic device;
and the hydraulic device receives the jacking stop signal, stops the ladle jacking device from jacking the ladle car and lifting the ladle, and stops the ladle at the ladle target lifting height position.
10. The method of claim 9, wherein obtaining the ladle target elevation height based on the measured clearance value of the ladle clearance measuring device comprises:
calculating and obtaining the target lifting height h of the ladle according to the following formula2：
h2＝h1+h4+500
Wherein h is4And jacking the vertical distance between the lower edge of the corresponding dip pipe and the edge of the steel ladle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010282927.4A CN111471835A (en) | 2020-04-10 | 2020-04-10 | RH furnace ladle lifting control method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010282927.4A CN111471835A (en) | 2020-04-10 | 2020-04-10 | RH furnace ladle lifting control method and system |
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| CN202010282927.4A Pending CN111471835A (en) | 2020-04-10 | 2020-04-10 | RH furnace ladle lifting control method and system |
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| CN114593664A (en) * | 2022-02-23 | 2022-06-07 | 本钢板材股份有限公司 | Refining LF furnace clearance measurement method based on graphite electrode |
| CN116081523A (en) * | 2023-02-07 | 2023-05-09 | 宝钢湛江钢铁有限公司 | RH automatic hydraulic jacking control method |
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Application publication date: 20200731 |
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