CN110468250B - Safety interlocking device for LF refining furnace electrode connecting platform and control method - Google Patents
Safety interlocking device for LF refining furnace electrode connecting platform and control method Download PDFInfo
- Publication number
- CN110468250B CN110468250B CN201910726068.0A CN201910726068A CN110468250B CN 110468250 B CN110468250 B CN 110468250B CN 201910726068 A CN201910726068 A CN 201910726068A CN 110468250 B CN110468250 B CN 110468250B
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- China
- Prior art keywords
- electrode
- isolation door
- isolation
- phase
- control cabinet
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
Abstract
The invention discloses a safety interlocking device and a control method for an LF refining furnace electrode connecting platform, and belongs to the technical field of LF external refining equipment. The technical scheme is as follows: under the condition that an operator does not cut off the three-phase electrode, the computer enables the power switch to be switched off through the electrode PLC control cabinet, the three-phase electrode is cut off, and meanwhile, the green light of the indicator light is on; when an operator leaves after the electrode is operated, the interval is 15 seconds, after the operator reaches a safe position, the three-phase electrode is electrified, and meanwhile, the red light of the indicator light is on. The device provided by the invention is reasonable in structure, the control method is simple and practical, when an operator forgets to turn off the high-voltage switch and enters the electrode platform, the power-off interlocking device is triggered after the safety isolation door is opened, the high-voltage switch is automatically turned off, and personal and equipment accidents caused by electrode arcing are effectively avoided.
Description
Technical Field
The invention discloses a safety interlocking device and a control method for an LF refining furnace electrode connecting platform, and belongs to the technical field of LF external refining equipment.
Background
The LF furnace is an external refining method which is mainly technically characterized by electric arc heating, graphite electrodes are used for heating, the electrodes are damaged by melting in the heating process, and heating operation is influenced after the electrodes are shortened, so that an electrode connecting platform can be connected with the electrodes or slid for multiple times in the production process to meet production requirements. The current of the LF furnace in the working process is 25-50KA, the voltage is 160-. If an operator forgets to turn off the high-voltage switch in the electrode connecting and sliding process and enters the electrode connecting platform for operation, the electrode arcing can be caused, personal and equipment accidents occur, the potential safety hazard is large, and similar accidents occur in some iron and steel enterprises.
Disclosure of Invention
The invention aims to solve the problems that the LF refining furnace power-on electrode platform safety interlocking device and the control method thereof are provided, so that the LF furnace body is in a power-off state when an operator performs power-on and sliding electrode operation, the personnel and equipment of the operator cannot be influenced, potential safety hazards are eliminated, and the technical problems in the prior art are solved.
The technical scheme of the invention is as follows:
a safety interlocking device for an LF refining furnace electrode connecting platform comprises an electrode isolation door lock, an electrode isolation door, an electrode isolation fence, a signal transmission line, an interlocking device PLC control cabinet, a computer, an indicator light, an electrode PLC control cabinet, a power switch and a three-phase electrode; the isolation door is arranged on the isolation fence, a signal transmission line is arranged on the isolation fence, and the electrode isolation door lock is arranged on the isolation door and matched with the isolation fence at one end; two ends of the electrode isolation door lock are respectively connected with signal transmission lines in the isolation fence, the signal transmission lines are connected with a PLC control cabinet of an interlocking device, the PLC control cabinet of the interlocking device is connected with a computer, the computer is simultaneously connected with an indicator lamp and the PLC control cabinet of the electrode, and the PLC control cabinet of the electrode is connected with a three-phase electrode through a power switch; when the electrode isolation door is closed, the electrode isolation door lock and the isolation fence at one end are in a connection state, and the corresponding three-phase electrode is electrified with high voltage electricity; when the electrode isolation door is opened, the electrode isolation door lock and the isolation fence at one end are in an off state, and the corresponding three-phase electrode is powered off.
The interval between the closing of the electrode isolation door and the electrifying of the three-phase electrode is 15 seconds, and no time interval exists between the opening of the electrode isolation door and the deenergizing of the three-phase electrode.
When the indicator light is a red light, the three-phase electrode power switch is closed, the three-phase electrode is electrified with high voltage, and when the indicator light is a green light, the three-phase electrode power switch is disconnected, and the three-phase electrode is powered off.
The safe interlocking control method for the LF refining furnace to connect the electrode platform comprises the following steps: under the condition that an operator does not cut off the three-phase electrode, the operator enters the operation platform, opens the electrode isolation door, disconnects the electrode isolation door lock from the isolation fence at one end, transmits a disconnection signal to the linkage device PLC control cabinet through a signal transmission line, transmits the signal to the computer by the linkage device PLC control cabinet, issues a three-phase electrode power supply disconnection command according to the received signal by the computer, and disconnects a power switch through the electrode PLC control cabinet, the three-phase electrode is cut off, and meanwhile, a green light of an indicator light is on; when an operator leaves after the three-phase electrode operation, the electrode isolation door is closed, the electrode isolation door lock is connected with an isolation fence at one end, signals are transmitted to a computer through a signal transmission line and a linkage device PLC control cabinet, and the computer issues a three-phase electrode power supply closing command; after 15 seconds of interval, the operator arrives at the safe position, makes switch closed through the electrode PLC switch board, and the three-phase electrode circular telegram, pilot lamp red light is bright simultaneously.
The invention has the beneficial effects that: the device provided by the invention is reasonable in structure, the control method is simple and practical, when an operator forgets to turn off the high-voltage switch and enters the electrode platform, the power-off interlocking device is triggered after the safety isolation door is opened, the high-voltage switch is automatically turned off, and personal and equipment accidents caused by electrode arcing are effectively avoided.
Drawings
FIG. 1 is a schematic view of a safety interlocking device for connecting an electrode platform of an LF refining furnace according to the present invention;
in the figure: the electrode isolation door lock comprises an electrode isolation door lock 1, an electrode isolation door 2, an electrode isolation fence 3, a signal transmission line 4, a linkage device PLC control cabinet 5, a computer 6, an indicator light 7, an electrode PLC control cabinet 8, a power switch 9 and a three-phase electrode 10.
Detailed Description
A safe interlocking device for an LF refining furnace electrode connecting platform comprises an electrode isolation door lock 1, an electrode isolation door 2, an electrode isolation fence 3, a signal transmission line 4, an interlocking device PLC control cabinet 5, a computer 6, an indicator light 7, an electrode PLC control cabinet 8, a power switch 9 and a three-phase electrode 10; the isolation door 2 is arranged on an isolation fence 3, a signal transmission line 4 is arranged on the isolation fence 3, and the electrode isolation door lock 1 is arranged on the isolation door 2 and matched with the isolation fence 3 at one end; two ends of an electrode isolation door lock 1 are respectively connected with a signal transmission line 4 in an isolation fence 3, the signal transmission line 4 is connected with an interlocking device PLC control cabinet 5, the interlocking device PLC control cabinet 5 is connected with a computer 6, the computer 6 is simultaneously connected with an indicator lamp 7 and an electrode PLC control cabinet 8, and the electrode PLC control cabinet 8 is connected with a three-phase electrode 10 through a power switch 9; when the electrode isolation door 2 is closed, the electrode isolation door lock 1 and the isolation fence 3 at one end are in a connected state, and the corresponding three-phase electrode 10 is electrified with high voltage electricity; when the electrode isolation door 2 is opened, the electrode isolation door lock 1 and the isolation fence 3 at one end are in an off state, and the corresponding three-phase electrode 10 is powered off.
The interval between the closing of the electrode isolation door 2 and the power-on of the three-phase electrode 10 is 15 seconds, and no time interval exists between the opening of the electrode isolation door 2 and the power-off of the three-phase electrode 10.
When the indicator light 7 is a red light, the three-phase electrode power switch 9 is closed, and the three-phase electrode 10 is electrified with high voltage electricity; when the indicator light 7 is a green light, the three-phase electrode power switch 9 is turned off, and the three-phase electrode 10 is turned off.
The safe interlocking control method for the LF refining furnace to connect the electrode platform comprises the following steps: under the condition that an operator does not cut off the three-phase electrode 10, the operator enters an operation platform, opens the electrode isolation door 2, disconnects the electrode isolation door lock 1 from the isolation fence 3 at one end, transmits a disconnection signal to the linkage device PLC control cabinet 5 through the signal transmission line 4, transmits the signal to the computer 6 through the linkage device PLC control cabinet 5, the computer 6 issues a three-phase electrode 10 power supply disconnection command according to the received signal, and enables the power switch 9 to be disconnected through the electrode PLC control cabinet 8, the three-phase electrode 10 is powered off, and meanwhile, the indicator light 7 is turned on in a green light mode; when an operator leaves after the operation of the three-phase electrode 10, the electrode isolation door 2 is closed, the electrode isolation door lock 1 is connected with the isolation fence 3 at one end, signals are transmitted to the computer 6 through the signal transmission line 4 and the interlocking device PLC control cabinet 5, and the computer 6 issues a power supply closing command of the three-phase electrode 10; after 15 seconds, the operator arrives at the safe position, the power switch 9 is closed through the electrode PLC control cabinet 8, the three-phase electrode 10 is electrified, and the indicator light 7 is lighted in red.
Claims (2)
1. The utility model provides a LF refining furnace connects electrode platform safety interlocking device which characterized in that: the device comprises an electrode isolation door lock (1), an electrode isolation door (2), an electrode isolation fence (3), a signal transmission line (4), a linkage device PLC control cabinet (5), a computer (6), an indicator light (7), an electrode PLC control cabinet (8), a power switch (9) and a three-phase electrode (10); the isolation door (2) is arranged on the isolation fence (3), a signal transmission line (4) is arranged on the isolation fence, and the electrode isolation door lock (1) is arranged on the isolation door (2) and matched with the isolation fence (3) at one end; two ends of an electrode isolation door lock (1) are respectively connected with a signal transmission line (4) in an isolation fence, the signal transmission line is connected with an interlocking device PLC control cabinet (5), the interlocking device PLC control cabinet is connected with a computer (6), the computer (6) is simultaneously connected with an indicator lamp (7) and an electrode PLC control cabinet (8), and the electrode PLC control cabinet (8) is connected with a three-phase electrode (10) through a power switch (9); when the electrode isolation door is closed, the electrode isolation door lock and the isolation fence at one end are in a connection state, and the corresponding three-phase electrode is electrified with high voltage electricity; when the electrode isolation door is opened, the electrode isolation door lock and the isolation fence at one end are in a disconnected state, and the corresponding three-phase electrode is powered off; the interval between the closing of the electrode isolation door and the electrifying of the three-phase electrode is 15 seconds, and no time interval exists between the opening of the electrode isolation door and the outage of the three-phase electrode; when the indicator light is a red light, the three-phase electrode power switch is closed, the three-phase electrode is electrified with high voltage, and when the indicator light is a green light, the three-phase electrode power switch is disconnected, and the three-phase electrode is powered off.
2. An LF refining furnace electrode connecting platform safety interlocking control method adopts the LF refining furnace electrode connecting platform safety interlocking device defined in claim 1, and is characterized by comprising the following steps: under the condition that an operator does not cut off the three-phase electrode, the operator enters the operation platform, opens the electrode isolation door, disconnects the electrode isolation door lock from the isolation fence at one end, transmits a disconnection signal to the linkage device PLC control cabinet through a signal transmission line, transmits the signal to the computer by the linkage device PLC control cabinet, issues a three-phase electrode power supply disconnection command according to the received signal by the computer, and disconnects a power switch through the electrode PLC control cabinet, the three-phase electrode is cut off, and meanwhile, a green light of an indicator light is on; when an operator leaves after the three-phase electrode operation, the electrode isolation door is closed, the electrode isolation door lock is connected with an isolation fence at one end, signals are transmitted to a computer through a signal transmission line and a linkage device PLC control cabinet, and the computer issues a three-phase electrode power supply closing command; after 15 seconds of interval, the operator arrives at the safe position, makes switch closed through the electrode PLC switch board, and the three-phase electrode circular telegram, pilot lamp red light is bright simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910726068.0A CN110468250B (en) | 2019-08-07 | 2019-08-07 | Safety interlocking device for LF refining furnace electrode connecting platform and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910726068.0A CN110468250B (en) | 2019-08-07 | 2019-08-07 | Safety interlocking device for LF refining furnace electrode connecting platform and control method |
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| CN110468250A CN110468250A (en) | 2019-11-19 |
| CN110468250B true CN110468250B (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910726068.0A Active CN110468250B (en) | 2019-08-07 | 2019-08-07 | Safety interlocking device for LF refining furnace electrode connecting platform and control method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122827A (en) * | 2014-08-07 | 2014-10-29 | 衢州迪升工业设计有限公司 | Physical protection linkage circuit |
| CN104142646A (en) * | 2014-08-08 | 2014-11-12 | 衢州迪升工业设计有限公司 | Physical protection interlocking circuit with acousto-optic warning function |
| CN104158522A (en) * | 2014-08-12 | 2014-11-19 | 衢州迪升工业设计有限公司 | Personal protection interlock circuit in work area |
| CN205620460U (en) * | 2016-05-19 | 2016-10-05 | 攀钢集团攀枝花钢钒有限公司 | LF stove circuit detecting system |
-
2019
- 2019-08-07 CN CN201910726068.0A patent/CN110468250B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122827A (en) * | 2014-08-07 | 2014-10-29 | 衢州迪升工业设计有限公司 | Physical protection linkage circuit |
| CN104142646A (en) * | 2014-08-08 | 2014-11-12 | 衢州迪升工业设计有限公司 | Physical protection interlocking circuit with acousto-optic warning function |
| CN104158522A (en) * | 2014-08-12 | 2014-11-19 | 衢州迪升工业设计有限公司 | Personal protection interlock circuit in work area |
| CN205620460U (en) * | 2016-05-19 | 2016-10-05 | 攀钢集团攀枝花钢钒有限公司 | LF stove circuit detecting system |
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| CN110468250A (en) | 2019-11-19 |
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