CN112338184A - Intelligent argon control system and method for buggy ladle - Google Patents
Intelligent argon control system and method for buggy ladle Download PDFInfo
- Publication number
- CN112338184A CN112338184A CN202011194058.6A CN202011194058A CN112338184A CN 112338184 A CN112338184 A CN 112338184A CN 202011194058 A CN202011194058 A CN 202011194058A CN 112338184 A CN112338184 A CN 112338184A
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- Prior art keywords
- argon
- ladle
- output end
- pipeline
- valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/12—Travelling ladles or similar containers; Cars for ladles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
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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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
Abstract
The invention relates to an intelligent argon control system and method for a buggy ladle, which adopt a brand-new system device architecture and specific control flow requirements, realize accurate positioning aiming at the buggy ladle, and avoid production accidents caused by incorrect position of the buggy ladle or error signals caused by adopting a limit switch; and based on the position detection of high accuracy, intelligent control is realized aiming at the delivery of argon gas, manual intervention is not needed, the on-off and flow of the argon gas can be automatically controlled according to the actual collection process condition, firstly, the labor intensity of operators is reduced, secondly, the waste of the argon gas is greatly reduced, thirdly, the reasonable and standard stirring is beneficial to the molten steel quality, fourthly, the driving safety operation of a hoisting ladle is beneficial, and the ladle car automatically controls the argon gas to be closed to the hoisting ladle position, so that the hidden danger is avoided.
Description
Technical Field
The invention relates to an intelligent argon control system and method for a buggy ladle, and belongs to the technical field of intelligent gas conveying.
Background
Argon is conveyed to a ladle car for stirring molten steel in the ladle car, in the existing argon conveying process, the on, off and flow control of argon are manually controlled, so that a large amount of manual labor is needed, in the implementation, steel is not discharged frequently, the argon is started in advance, the argon is wasted, meanwhile, the flow is manually controlled, the conveying flow is too large or too small, unreasonable stirring of the molten steel can be brought, and when the flow is too large, the rolling form of the molten steel under the action of the argon is large and dazzling, the driving sight is seriously affected, and safety accidents are easy to happen.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent argon control system for a buggy ladle, which can accurately detect each position device of the buggy ladle, thereby realizing high-precision control on argon conveying, intelligently adjusting the flow and improving the working efficiency of argon stirring on molten steel.
The invention adopts the following technical scheme for solving the technical problems: the invention designs an intelligent argon control system for a buggy ladle, which is used for conveying argon to the buggy ladle and stirring molten steel in the buggy ladle, and is characterized in that: the device comprises a distance meter, a master control module, a first filter, a first pressure reducing valve, a control air source pressure regulator, a second filter, a second pressure reducing valve, a first flow controller, a first one-way valve, a second flow controller and a second one-way valve;
the distance measuring instrument is used for detecting a ladle position, a sand filling position and a steel tapping position aiming at the ladle car; the input end of the first filter is externally connected with the argon gas, the output end of the first filter is connected with the input end of the second filter after being connected with the first pressure reducing valve in series through a pipeline, and the gas source pressure regulator is controlled to be connected with the pipeline between the first pressure reducing valve and the second filter in a butt joint mode and used for regulating the pressure of the argon gas in the connected pipeline;
the output end of the second filter is connected with a second pressure reducing valve in series through a pipeline and then is respectively butted with the input end of the first flow controller and the input end of the second flow controller, the output end of the first flow controller is butted with the input end of the first one-way valve through a pipeline, and the output end of the second flow controller is butted with the input end of the second one-way valve through a pipeline; the output end of the first one-way valve and the output end of the second one-way valve are connected with each other and then are butted with a pipeline to form an argon output end for conveying argon to the buggy ladle;
the distance measuring instrument, the control air source pressure regulator, the first flow controller and the second flow controller are respectively connected with the master control module, and the master control module respectively controls the control air source pressure regulator, the first flow controller and the second flow controller according to the detection result of the distance measuring instrument.
As a preferred technical scheme of the invention: the input end of the electric control pneumatic valve is in butt joint with a pipeline between the first pressure reducing valve and the second filter through a pipeline, and the output end of the electric control pneumatic valve is in butt joint with and communicated with the butt joint position of the output end of the first one-way valve and the output end of the second one-way valve; the electric control pneumatic valve is connected with the master control module, and the master control module controls the electric control pneumatic valve.
As a preferred technical scheme of the invention: the argon gas pressure detection device further comprises a first pressure transmitter and a second pressure transmitter, wherein the first pressure transmitter detects the argon gas pressure in the pipeline connected with the input end of the second filter and uploads the argon gas pressure to the master control module; and the second pressure transmitter detects the argon pressure at the butt joint position of the output end of the first one-way valve and the output end of the second one-way valve and uploads the argon pressure to the master control module.
As a preferred technical scheme of the invention: the argon gas purification device is characterized by further comprising a first manual valve and a second manual valve, wherein the input end of the first filter is connected with the first manual valve in series through a pipeline to form an argon gas access section for externally connecting and obtaining argon gas; and the output end of the first one-way valve and the output end of the second one-way valve are connected with each other and then are connected with the second manual valve in series through a pipeline to form an argon output end.
Correspondingly, the technical problem to be solved by the invention is to provide a control method applying the buggy ladle argon intelligent control system, which can accurately detect each position device of the buggy ladle, thereby realizing high-precision control on argon conveying, intelligently adjusting the flow and improving the working efficiency of argon stirring on molten steel.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a control method of an argon intelligent control system of a buggy ladle, which comprises the following steps:
step A, controlling argon to start conveying according to an electric furnace steel tapping signal, and entering step B when a ladle position of a buggy ladle is detected;
b, controlling argon to be conveyed and supplied at the flow rate of 600l/min, and entering the step C when a sand filling position of the buggy ladle is detected;
c, controlling argon to be conveyed and supplied at the flow rate of 300l/min, and entering the step D when the steel ladle car steel tapping position is detected;
and D, controlling argon to carry out conveying supply at the flow rate of 150 l/min.
Compared with the prior art, the intelligent argon control system and the intelligent argon control method for the buggy ladle have the following technical effects by adopting the technical scheme:
according to the intelligent argon control system and method for the buggy ladle, a brand-new system device architecture and specific control flow requirements are adopted, accurate positioning is realized for the buggy ladle, the position is accurate to a millimeter level, and production accidents caused by incorrect signals due to inaccurate buggy ladle position or the adoption of limit switches are avoided; and based on the position detection of high accuracy, intelligent control is realized aiming at the delivery of argon gas, manual intervention is not needed, the on-off and flow of the argon gas can be automatically controlled according to the actual collection process condition, firstly, the labor intensity of operators is reduced, secondly, the waste of the argon gas is greatly reduced, thirdly, the reasonable and standard stirring is beneficial to the molten steel quality, fourthly, the driving safety operation of a hoisting ladle is beneficial, and the ladle car automatically controls the argon gas to be closed to the hoisting ladle position, so that the hidden danger is avoided.
Drawings
FIG. 1 is a schematic block diagram of an argon intelligent control system of a buggy ladle designed by the invention.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention provides an argon intelligent control system of a buggy ladle, which is used for conveying argon to the buggy ladle and stirring molten steel in the buggy ladle, and comprises a distance meter, a master control module, a first manual valve, a second manual valve, a first filter, a first pressure reducing valve, a control gas source pressure regulator, a second filter, a second pressure reducing valve, a first flow controller, a first check valve, a second flow controller, a second check valve, an electric control pneumatic valve, a first pressure transmitter and a second pressure transmitter, as shown in figure 1.
The distance measuring instrument is used for detecting a ladle position, a sand filling position and a steel tapping position aiming at the ladle car; the input of first filter constitutes the argon gas access section after the first manual valve of pipeline series connection for the external argon gas that acquires, the output of first filter connects the input of second filter after the first relief pressure valve of pipeline series connection, and the pipeline between control air supply voltage regulator butt joint first relief pressure valve and the second filter is used for adjusting to the pressure of argon gas in the pipeline of taking over.
The output end of the second filter is connected with a second pressure reducing valve in series through a pipeline and then is respectively butted with the input end of the first flow controller and the input end of the second flow controller, the output end of the first flow controller is butted with the input end of the first one-way valve through a pipeline, and the output end of the second flow controller is butted with the input end of the second one-way valve through a pipeline; and the output end of the first one-way valve and the output end of the second one-way valve are connected with each other and then are connected with the second manual valve in series through a pipeline to form an argon output end for conveying argon to the buggy ladle.
The input end of the electric control pneumatic valve is in butt joint with a pipeline between the first pressure reducing valve and the second filter through a pipeline, and the output end of the electric control pneumatic valve is in butt joint with and communicated with the butt joint position of the output end of the first one-way valve and the output end of the second one-way valve through a pipeline.
The first pressure transmitter detects the argon pressure in the pipeline connected with the input end of the second filter and uploads the argon pressure to the master control module; and the second pressure transmitter detects the argon pressure at the butt joint position of the output end of the first one-way valve and the output end of the second one-way valve and uploads the argon pressure to the master control module.
The distance measuring instrument, the control air source pressure regulator, the first flow controller, the second flow controller and the electric control pneumatic valve are respectively connected with the master control module, and the master control module respectively controls the control air source pressure regulator, the first flow controller, the second flow controller and the electric control pneumatic valve according to detection results of the distance measuring instrument, the first pressure transmitter and the second pressure transmitter.
Based on the actual device design of the system and the detection results of all the detection devices, the invention further designs a control method applying the intelligent argon control system for the buggy ladle, and in actual application, the following steps A to D are specifically executed.
Step A, controlling argon to start conveying according to an electric furnace steel tapping signal, and entering step B when a ladle position of a buggy ladle is detected;
b, controlling argon to be conveyed and supplied at the flow rate of 600l/min, and entering the step C when a sand filling position of the buggy ladle is detected;
c, controlling argon to be conveyed and supplied at the flow rate of 300l/min, and entering the step D when the steel ladle car steel tapping position is detected;
and D, controlling argon to carry out conveying supply at the flow rate of 150 l/min.
According to the intelligent argon control system and method for the buggy ladle, in practical application, a set of SICK laser distance measuring instruments are adopted in the distance measuring instrument design, plc is configured, a control program is programmed, a control picture is additionally arranged on an HMI (human machine interface), ladle lifting positions, sand filling positions and steel tapping positions of the buggy ladle are positioned, and a ladle remote automatic control function is realized. The design ladle car argon gas intelligence control system through gathering electric stove and concise plc data, automatic monitoring technology situation, through plc programming, realizes argon gas intelligent control.
Before argon control equipment is improved, argon is opened as soon as a buggy ladle is driven to a steel tapping position, the electric furnace sometimes waits for a few minutes and more than ten and more minutes after a ladle is in place to tap steel, the flow rate of a manually-operated argon valve is generally about 900l/min, 30 furnaces of steel are used on average every day, the waiting time from the buggy ladle to the steel tapping position is calculated on average 5min per furnace, the consumption of one month is equal to 900l/min 5min 30 furnaces 30 days =4050000l, and 0.81 ten thousand yuan is wasted every month by the price of 2 yuan of argon per cubic meter, which is only wasted by the steel tapping position. By using the intelligent argon control system for the ladle car designed by the invention and combining the designed control method, only after an electric furnace steel tapping signal is detected (obtained by combining electric furnace ladle car weighing, an electric furnace tilting angle and a steel tapping sliding plate signal), the argon is opened, and the argon is controlled by the original flow value of about 70 percent, namely the flow of 630l/min and the flow to the sand filling position are reduced to 300l/min, and the flow to the ladle position is 150l/min until the ladle position is automatically closed, so that the argon saving effect is obvious, the argon annual ton steel consumption is 2 cubic meters per ton before the equipment is improved, the argon annual ton steel consumption is 0.7 cubic meters per ton after the equipment is improved, and the argon annual cubic meter per ton steel consumption is calculated by 100 ten thousand tons produced in an annual workshop, and the argon is saved all the year by 2-0.7 cubic meters per ton (2-0.7) cubic meters per ton steel per year = 100 ten thousand tons =130 ten thousand yuan.
According to the intelligent argon control system and method for the buggy ladle designed by the technical scheme, a brand-new system device architecture and specific control flow requirements are adopted, accurate positioning is realized for the buggy ladle, the position is accurate to a millimeter level, and production accidents caused by incorrect signals due to inaccurate buggy ladle position or the adoption of limit switches are avoided; and based on the position detection of high accuracy, intelligent control is realized aiming at the delivery of argon gas, manual intervention is not needed, the on-off and flow of the argon gas can be automatically controlled according to the actual collection process condition, firstly, the labor intensity of operators is reduced, secondly, the waste of the argon gas is greatly reduced, thirdly, the reasonable and standard stirring is beneficial to the molten steel quality, fourthly, the driving safety operation of a hoisting ladle is beneficial, and the ladle car automatically controls the argon gas to be closed to the hoisting ladle position, so that the hidden danger is avoided.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (5)
1. The utility model provides a buggy ladle argon gas intelligence control system for carry argon gas to the buggy ladle, realize the stirring to the interior molten steel of buggy ladle, its characterized in that: the device comprises a distance meter, a master control module, a first filter, a first pressure reducing valve, a control air source pressure regulator, a second filter, a second pressure reducing valve, a first flow controller, a first one-way valve, a second flow controller and a second one-way valve;
the distance measuring instrument is used for detecting a ladle position, a sand filling position and a steel tapping position aiming at the ladle car; the input end of the first filter is externally connected with the argon gas, the output end of the first filter is connected with the input end of the second filter after being connected with the first pressure reducing valve in series through a pipeline, and the gas source pressure regulator is controlled to be connected with the pipeline between the first pressure reducing valve and the second filter in a butt joint mode and used for regulating the pressure of the argon gas in the connected pipeline;
the output end of the second filter is connected with a second pressure reducing valve in series through a pipeline and then is respectively butted with the input end of the first flow controller and the input end of the second flow controller, the output end of the first flow controller is butted with the input end of the first one-way valve through a pipeline, and the output end of the second flow controller is butted with the input end of the second one-way valve through a pipeline; the output end of the first one-way valve and the output end of the second one-way valve are connected with each other and then are butted with a pipeline to form an argon output end for conveying argon to the buggy ladle;
the distance measuring instrument, the control air source pressure regulator, the first flow controller and the second flow controller are respectively connected with the master control module, and the master control module respectively controls the control air source pressure regulator, the first flow controller and the second flow controller according to the detection result of the distance measuring instrument.
2. The buggy ladle argon intelligent control system of claim 1, characterized in that: the input end of the electric control pneumatic valve is in butt joint with a pipeline between the first pressure reducing valve and the second filter through a pipeline, and the output end of the electric control pneumatic valve is in butt joint with and communicated with the butt joint position of the output end of the first one-way valve and the output end of the second one-way valve; the electric control pneumatic valve is connected with the master control module, and the master control module controls the electric control pneumatic valve.
3. The buggy ladle argon intelligent control system of claim 1, characterized in that: the argon gas pressure detection device further comprises a first pressure transmitter and a second pressure transmitter, wherein the first pressure transmitter detects the argon gas pressure in the pipeline connected with the input end of the second filter and uploads the argon gas pressure to the master control module; and the second pressure transmitter detects the argon pressure at the butt joint position of the output end of the first one-way valve and the output end of the second one-way valve and uploads the argon pressure to the master control module.
4. The buggy ladle argon intelligent control system of claim 1, characterized in that: the argon gas purification device is characterized by further comprising a first manual valve and a second manual valve, wherein the input end of the first filter is connected with the first manual valve in series through a pipeline to form an argon gas access section for externally connecting and obtaining argon gas; and the output end of the first one-way valve and the output end of the second one-way valve are connected with each other and then are connected with the second manual valve in series through a pipeline to form an argon output end.
5. A control method of the intelligent argon control system for the buggy ladle according to any one of claims 1 to 4, characterized by comprising the following steps:
step A, controlling argon to start conveying according to an electric furnace steel tapping signal, and entering step B when a ladle position of a buggy ladle is detected;
b, controlling argon to be conveyed and supplied at the flow rate of 600l/min, and entering the step C when a sand filling position of the buggy ladle is detected;
c, controlling argon to be conveyed and supplied at the flow rate of 300l/min, and entering the step D when the steel ladle car steel tapping position is detected;
and D, controlling argon to carry out conveying supply at the flow rate of 150 l/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194058.6A CN112338184A (en) | 2020-10-30 | 2020-10-30 | Intelligent argon control system and method for buggy ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194058.6A CN112338184A (en) | 2020-10-30 | 2020-10-30 | Intelligent argon control system and method for buggy ladle |
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| Publication Number | Publication Date |
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| CN112338184A true CN112338184A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011194058.6A Pending CN112338184A (en) | 2020-10-30 | 2020-10-30 | Intelligent argon control system and method for buggy ladle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774617A (en) * | 2022-04-11 | 2022-07-22 | 武汉钢铁有限公司 | Ladle bottom argon blowing control method, device, equipment and medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2445190A1 (en) * | 1973-09-25 | 1975-04-24 | Centro Speriment Metallurg | METHOD FOR PRODUCING STEEL |
| JP2010095782A (en) * | 2008-10-20 | 2010-04-30 | Central Glass Co Ltd | Method and system for feeding gas composition for preventing firing of molten metal of magnesium or magnesium alloy |
| CN201883109U (en) * | 2010-12-06 | 2011-06-29 | 无锡东雄重型电炉有限公司 | Automatic argon-blowing device |
| CN202390473U (en) * | 2011-12-15 | 2012-08-22 | 陕西方园冶金设备有限公司 | Argon blowing device |
| CN203393183U (en) * | 2013-07-22 | 2014-01-15 | 杭州杭真真空工程技术有限公司 | Argon blowing control device at ladle bottom |
| CN204939523U (en) * | 2015-09-26 | 2016-01-06 | 山东西王特钢有限公司 | A kind of ladle furnace |
-
2020
- 2020-10-30 CN CN202011194058.6A patent/CN112338184A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2445190A1 (en) * | 1973-09-25 | 1975-04-24 | Centro Speriment Metallurg | METHOD FOR PRODUCING STEEL |
| JP2010095782A (en) * | 2008-10-20 | 2010-04-30 | Central Glass Co Ltd | Method and system for feeding gas composition for preventing firing of molten metal of magnesium or magnesium alloy |
| CN201883109U (en) * | 2010-12-06 | 2011-06-29 | 无锡东雄重型电炉有限公司 | Automatic argon-blowing device |
| CN202390473U (en) * | 2011-12-15 | 2012-08-22 | 陕西方园冶金设备有限公司 | Argon blowing device |
| CN203393183U (en) * | 2013-07-22 | 2014-01-15 | 杭州杭真真空工程技术有限公司 | Argon blowing control device at ladle bottom |
| CN204939523U (en) * | 2015-09-26 | 2016-01-06 | 山东西王特钢有限公司 | A kind of ladle furnace |
Non-Patent Citations (1)
| Title |
|---|
| 王雪明，黄春东，施军贤，陆网军: "全自动控制在钢包车上的应用", 《第十二届中国钢铁年会》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774617A (en) * | 2022-04-11 | 2022-07-22 | 武汉钢铁有限公司 | Ladle bottom argon blowing control method, device, equipment and medium |
| CN114774617B (en) * | 2022-04-11 | 2024-03-01 | 武汉钢铁有限公司 | Ladle bottom argon blowing control method, device, equipment and medium |
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