CN201191362Y - Molten steel refining roof gun control device for vacuum loop degassing method - Google Patents
Molten steel refining roof gun control device for vacuum loop degassing method Download PDFInfo
- Publication number
- CN201191362Y CN201191362Y CNU2008200583931U CN200820058393U CN201191362Y CN 201191362 Y CN201191362 Y CN 201191362Y CN U2008200583931 U CNU2008200583931 U CN U2008200583931U CN 200820058393 U CN200820058393 U CN 200820058393U CN 201191362 Y CN201191362 Y CN 201191362Y
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- control loop
- contactor
- top rifle
- rifle
- line
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model relates to a control device of a liquid steel refining top lance which is used in the vacuum degassing process. The control device comprises an automatic change-over switch, a circuit breaker, contactors, an intermediate relay, a time relay, a stroke switch of an external stand-by position of a vacuum groove, a transducer and an emergency stop button, and all the components are connected via a circuit to realize the automatic control of the top lance. The circuit comprises a main control loop of the top lance, an auxiliary control loop of the top lance, a contracting brake of the top lance and a control loop of a cooling fan. In the main control loop of the top lance, the automatic change-over switch is connected with the circuit breaker, a first contactor and a second contactor respectively, the first contactor is connected with a U1 end, V1 end and a W1 end of the transducer, the transducer is connected with the intermediate relay, a U2 end, a V2 end and a W2 end of the transducer are connected with the second contactor, and a U end, a V end and a W end of a motor of the top lance are in parallel connection with the second contactor and the transducer. The control device of the liquid steel refining top lance can realize the lift of the top lance, and increases the safety and the reliability of the top lance.
Description
Technical field
The utility model relates to the metallurgy industry liquid steel refining, particularly a kind of liquid steel refining top rifle control device that is used for vacuum circulation degassing method (RH), particularly a kind of top rifle control circuit.
Background technology
Molten steel in the metallurgy industry purified steel device top lance system against vacuum groove has the function of oxygen decarburization, chemical heat and winding-up combustion gas, and in whole molten steel refining technology process, the top rifle has important effect to improving the steel grade quality.The present top lance system control mode of mains supply and frequency conversion independently, when power failure or frequency converter failure took place, the top rifle can not be promoted to outside the vacuum tank apace automatically, and the easy like this top rifle rifle body that causes is burnt out.
The utility model content
Control mode at above-mentioned purified steel device top lance system, task of the present utility model provides a kind of improved liquid steel refining top rifle control device that is used for vacuum circulation degassing method (RH), and it has solved existing top lance system top rifle when outage or frequency converter failure take place can not be promoted to the problem that causes top rifle rifle body to be burnt out outside the vacuum tank automatically.
Technical solution of the present utility model is as follows:
A kind of liquid steel refining top rifle control device that is used for vacuum circulation degassing method, it comprises automatic change over, isolating switch, contactor, auxiliary reclay, the time relay, vacuum tank are treated as a stranger the seat in the plane travel switch, frequency converter and tightly stop button, each components and parts connects to realize that the top rifle controls automatically by circuit;
Described circuit comprises top rifle main control loop, top rifle subsidiary control loop, and top rifle band-type brake and cooling blower control loop;
In the rifle main control loop of described top, automatic change over is connected with isolating switch, first contactor, second contactor respectively, first contactor is connected with U1, V1, the W1 end of frequency converter again, on frequency converter, connect first auxiliary reclay, second auxiliary reclay, the U2 of frequency converter, V2, W2 end then are connected with second contactor, and U, the V of top rifle motor, W end is with second contactor and frequency converter parallel connection;
Described top rifle subsidiary control loop is connected with L line, the N line of the AC 220V control power supply of introducing from top rifle main control loop, in the rifle subsidiary control loop of top, the 3rd auxiliary reclay, the 4th auxiliary reclay, the time relay are connected in parallel in the control loop respectively, to realize the strange land operation, the vacuum tank that series connection the one and the 4th auxiliary reclay joins on the control loop of limit position outside vacuum tank is treated as a stranger the seat in the plane travel switch at the anxious normally closed button that tightly stops that stops connecting in the control loop of top rifle;
Described top rifle band-type brake is connected with A line, B line, C line, the N line introduced from top rifle subsidiary control loop with the cooling blower control loop, in top rifle band-type brake and cooling blower control loop, the 3rd contactor is connected on A line, B line, the C line, and the 3rd contactor is connected to top rifle band-type brake and cooling blower by circuit again.
RH liquid steel refining of the present utility model top rifle control device is a kind of novel top rifle frequency-converting control device, can realize top rifle lifting, improves the security and the reliability of top rifle.
Adopt top of the present utility model rifle control device, when the mains supply interruption took place, automatic change over switched to back-up source ups power loop and powers, and fast automatic lifting top rifle to vacuum tank is treated as a stranger the seat in the plane; In operational process,, frequency converter treats as a stranger the seat in the plane to vacuum tank if when breaking down, then adopting the power frequency bypass to promote the top rifle.Above dual mode all can avoid top rifle rifle body to be burnt out in vacuum tank effectively.
Description of drawings
Fig. 1 is the top rifle main control circuit figure of a kind of RH liquid steel refining of the present utility model top rifle control device.
Fig. 2 is the top rifle auxiliary control circuit figure of a kind of RH liquid steel refining of the present utility model top rifle control device.
Fig. 3 is the top rifle band-type brake and the cooling blower control circuit figure of a kind of RH liquid steel refining of the present utility model top rifle control device.
Fig. 4 is the top rifle rising or falling speed control curve map of a kind of RH liquid steel refining of the present utility model top rifle control device.
Number in the figure: the 1st, automatic change over, the 2nd, isolating switch, 3 is first contactors, 4 is second contactors, and 5 is the 3rd contactors, and 6 is first auxiliary reclays, 7 is second auxiliary reclays, and 8 is the 3rd auxiliary reclays, and 9 is the 4th auxiliary reclays, the 10th, the time relay, the 11st, vacuum tank is treated as a stranger seat in the plane travel switch, the 12nd, frequency converter, the 14th, top rifle motor, the 13rd, tightly stop button, the 101st, often drive auxiliary contact, the 102nd, normally closed auxiliary contact, the 104th, often drive auxiliary contact.
Embodiment
Referring to Fig. 1 to Fig. 3, the utility model is a kind of liquid steel refining top rifle control device that is used for vacuum circulation degassing method (RH), it comprises that automatic change over 1, isolating switch 2, contactor, auxiliary reclay, the time relay 10, vacuum tank treat as a stranger seat in the plane travel switch 11, frequency converter 12 and tightly stop button 13, each components and parts connects by circuit, realizes the safe and reliable automatic control of top rifle.
The circuit of this control device comprises top rifle main control loop (see figure 1), top rifle subsidiary control loop (see figure 2), and top rifle band-type brake and cooling blower control loop (see figure 3).
As shown in fig. 1, in the rifle main control loop of top, automatic change over 1 is connected with isolating switch 2, first contactor 3, second contactor 4 respectively, and first contactor 3 is connected with U1, V1, the W1 end of frequency converter 12 again.Connect first auxiliary reclay 6, second auxiliary reclay 7 on frequency converter 12, the U2 of frequency converter 12, V2, W2 end then are connected with second contactor 4.U, the V of top rifle motor 14, W end is with second contactor 4 and frequency converter 12 parallel connections.Automatic change over 1 is connected with electrical network and back-up source UPS, is powered by back-up source UPS after the generation loss of power accident.Frequency converter 12 carries out communication by cable with distant station PLC and is connected,, operator's console long-range to realize, the control of on-the-spot three ground.
As shown in Figure 2, rifle subsidiary control loop in top is connected with L line, the N line of the AC 220V control power supply of introducing from top rifle main control loop.In the rifle subsidiary control loop of top, the 3rd auxiliary reclay 8, the 4th auxiliary reclay 9, the time relay 10 are connected in parallel on respectively in the control loop, at the anxious normally closed button 13 that tightly stops of connecting in the control loop that stops of top rifle, can realize the strange land operation.The vacuum tank that series connection the one and the 4th auxiliary reclay 9 joins on the control loop of limit position outside vacuum tank is treated as a stranger seat in the plane travel switch 11.
As shown in Figure 3, rifle band-type brake in top is connected with A line, B line, C line, the N line introduced from top rifle subsidiary control loop with the cooling blower control loop.In top rifle band-type brake and cooling blower control loop, the 3rd contactor 5 is connected on A line, B line, the C line, and the 3rd contactor 5 is connected to top rifle band-type brake and cooling blower by circuit again.
RH liquid steel refining of the present utility model top rifle control device at work, when operation of power networks is just often powered by motor control center (MCC); When if mains supply interrupts, owing to disposed back-up source UPS, UPS powers by back-up source, and the duration can reach 30 minutes, and the change action of power supply is finished by automatic change over.
The lifting of top rifle is controlled by frequency converter, during the frequency converter operate as normal, can carry out safe and reliable lifting control to the top rifle; When if frequency converter breaks down, adopt the power frequency bypass to promote top rifle to vacuum tank and treat as a stranger the seat in the plane, in order to avoid top rifle rifle body is burnt out.
At the mains supply power supply just often, automatic change over 1 closes at the N position, isolating switch 2 closures; 9 energisings of the 4th auxiliary reclay, its auxiliary contact closure; 3 energisings of first contactor, its main contacts closure, then frequency converter 12 energisings.After receiving enabled instruction, be used to control first auxiliary reclay 6 of band-type brake and blower fan start and stop, and 7 energisings of second auxiliary reclay, second auxiliary reclay 7 is output as high level during non-fault, and it often opens the auxiliary contact closure.5 energisings of the 3rd contactor and auxiliary main contacts closure, then rifle band-type brake in top unclamps, and top rifle motor cooling blower starts, and the top rifle carries out lifting according to the instruction that distant station PLC sends.
When frequency converter breaks down, first auxiliary reclay, 6 dead electricity, it is often driven auxiliary contact 104 and disconnects; Manually press control desk and tighten and stop button 13 and make its disconnection, time-delay relay trip time 10, through 3～5 seconds (this is to satisfy the top rifle to promote the required time of condition), its auxiliary contact disconnected; The normally closed auxiliary contact closure of second auxiliary reclay 7; The 3rd auxiliary reclay 8 dead electricity, its auxiliary contact closure, then second contactor, 4 energisings.Second contactor, 4 main contactss and its are often opened auxiliary contact 101 closures among Fig. 1, top rifle band-type brake unclamps, top rifle motor cooling blower starts, at this moment the top rifle is thus lifted to outside the vacuum tank by the power frequency bypass, when touching vacuum tank and treat as a stranger the seat in the plane travel switch, disconnect the 4th auxiliary reclay 9 dead electricity, second contactor, 4 dead electricity 11 the time, its main contacts disconnects, and then the top rifle stops at and treats the seat in the plane.
If when power supply interrupted, automatic change over 1 automatically switched to the R position, top lance system is promptly promoted top rifle to vacuum tank according to above-mentioned working method and is treated as a stranger the seat in the plane by back-up source UPS power supply.
Referring to Fig. 4, shown rifle rising or falling speed control curve in top among the figure.In the preceding 1m of top rifle lifting travel, speed is quickened for even; Be displaced to when reaching 1m, the speed of top rifle lifting increases to 10m/min; During apart from destination 0.8m, top rifle speed becomes uniformly retarded motion in top rifle displacement; In top rifle displacement during apart from destination 0.2m, top rifle motor brake sticking brake.Impact when this speed control method can be avoided braking effectively, and guarantee the bearing accuracy of top rifle.Top rifle displacement can be used following formulate:
L(m)＝1(m)+x(m)+0.6(m)+0.2(m)
The distance of x changes according to the stroke of top rifle is different in the formula.
Adopt RH liquid steel refining of the present utility model top rifle control device, not only can improve liquid steel refining efficient, and can carry out safe operation and reliably protecting the top rifle.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the utility model, and be not with opposing qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claim conversion, the modification of the foregoing description.
Claims (3)
1. liquid steel refining top rifle control device that is used for vacuum circulation degassing method, it is characterized in that, it comprises automatic change over, isolating switch, contactor, auxiliary reclay, the time relay, vacuum tank is treated as a stranger the seat in the plane travel switch, frequency converter and tightly stop button, and each components and parts connects to realize that the top rifle controls automatically by circuit;
Described circuit comprises top rifle main control loop, top rifle subsidiary control loop, and top rifle band-type brake and cooling blower control loop;
In the rifle main control loop of described top, automatic change over is connected with isolating switch, first contactor, second contactor respectively, first contactor is connected with U1, V1, the W1 end of frequency converter again, on frequency converter, connect first auxiliary reclay, second auxiliary reclay, the U2 of frequency converter, V2, W2 end then are connected with second contactor, and U, the V of top rifle motor, W end is with second contactor and frequency converter parallel connection;
Described top rifle subsidiary control loop is connected with L line, the N line of the AC 220V control power supply of introducing from top rifle main control loop, in the rifle subsidiary control loop of top, the 3rd auxiliary reclay, the 4th auxiliary reclay, the time relay are connected in parallel in the control loop respectively, to realize the strange land operation, the vacuum tank that series connection the one and the 4th auxiliary reclay joins on the control loop of limit position outside vacuum tank is treated as a stranger the seat in the plane travel switch at the anxious normally closed button that tightly stops that stops connecting in the control loop of top rifle;
Described top rifle band-type brake is connected with A line, B line, C line, the N line introduced from top rifle subsidiary control loop with the cooling blower control loop, in top rifle band-type brake and cooling blower control loop, the 3rd contactor is connected on A line, B line, the C line, and the 3rd contactor is connected to top rifle band-type brake and cooling blower by circuit again.
2. the liquid steel refining top rifle control device that is used for vacuum circulation degassing method according to claim 1 is characterized in that described automatic change over is connected with electrical network and back-up source UPS.
3. the liquid steel refining top rifle control device that is used for vacuum circulation degassing method according to claim 1 is characterized in that, described frequency converter by cable and distant station PLC carry out that communication link is long-range to realize, operator's console, the control of on-the-spot three ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200583931U CN201191362Y (en) | 2008-05-15 | 2008-05-15 | Molten steel refining roof gun control device for vacuum loop degassing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200583931U CN201191362Y (en) | 2008-05-15 | 2008-05-15 | Molten steel refining roof gun control device for vacuum loop degassing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191362Y true CN201191362Y (en) | 2009-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200583931U Expired - Lifetime CN201191362Y (en) | 2008-05-15 | 2008-05-15 | Molten steel refining roof gun control device for vacuum loop degassing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201191362Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111100966A (en) * | 2019-12-12 | 2020-05-05 | 首钢京唐钢铁联合有限责任公司 | Converter sublance lifting control system and method |
-
2008
- 2008-05-15 CN CNU2008200583931U patent/CN201191362Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111100966A (en) * | 2019-12-12 | 2020-05-05 | 首钢京唐钢铁联合有限责任公司 | Converter sublance lifting control system and method |
| CN111100966B (en) * | 2019-12-12 | 2021-11-19 | 首钢京唐钢铁联合有限责任公司 | Converter sublance lifting control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAOSTEER ENGINEERING TECHNOLOGY GROUP CO., LTD Free format text: FORMER OWNER: BAOGANG ENGINEERING TECHN CO., LTD., SHANGHAI Effective date: 20100721 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100721 Address after: 201900 Shanghai city Baoshan District Tieli Road No. 2510 Patentee after: Baosteel Engeneering &Technology Group Co., Ltd. Address before: 201900 Shanghai city Baoshan District Tieli Road No. 2510 Patentee before: Shanghai Baogang Engineering Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090204 |