CN211084788U - Improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit - Google Patents
Improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit Download PDFInfo
- Publication number
- CN211084788U CN211084788U CN201921951517.3U CN201921951517U CN211084788U CN 211084788 U CN211084788 U CN 211084788U CN 201921951517 U CN201921951517 U CN 201921951517U CN 211084788 U CN211084788 U CN 211084788U
- Authority
- CN
- China
- Prior art keywords
- arc furnace
- direct current
- control system
- servo motor
- speed reducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Furnace Details (AREA)
- Discharge Heating (AREA)
Abstract
The utility model discloses an improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit, belong to jacking equipment technical field, including drive arrangement, bracing piece and support arm, the support arm has the lift degree of freedom with the help of the cooperation of drive arrangement and bracing piece, control system still includes P L C controller, be provided with arc voltage measurement signal input on the analog-to-digital conversion module of P L C controller, arc current measurement signal input and given current signal input, drive arrangement includes AC servo motor and servo driver, the output of P L C controller is connected with servo driver's input, servo driver's output and AC servo motor's input are connected, the support arm has the lift degree of freedom with the help of the cooperation of AC servo motor and bracing piece, can effectively avoid the emergence of the hot stove of direct current electric arc furnace and direct current ore deposit outage accident electrode because of dropping moment is too big, the phenomenon of the high-voltage impact high-voltage tripping operation of can effectively avoid appearing simultaneously.
Description
Technical Field
The utility model belongs to the technical field of jacking equipment, involve lift control system, especially a hot stove electrode lift control system in improved generation direct current electric arc furnace, ore deposit.
Background
Compared with a three-phase alternating current electric arc furnace, the direct current electric arc furnace has the advantages that the ① direct current electric arc furnace saves 1-2 sets of electrode devices compared with an alternating current electric arc furnace, the ② furnace wall refractory material has long service life, furnace materials are uniformly melted, ③ direct current electric arc current is stable, ④ alternating current electric arc furnace has low natural power factor which is generally about 0.8, the direct current electric arc furnace has high natural power factor which is generally about 0.95, the ⑤ energy consumption is low and can save 15%, ⑥ alternating current electric arc furnace has frequent fluctuation of reactive power to cause voltage flicker of a power grid, the direct current electric arc furnace does not have the phenomenon, ⑦ direct current electric arc furnace has symmetrical three-phase load and has no interference and impact phenomena on the power grid, ⑧ furnace materials are uniformly melted, the three-phase electric arc furnace has a lateral form and mutual influence among three-phase electric arcs, the furnace materials are not uniformly melted, the direct current electric arc furnace has a central vertical form and uniform heat distribution, the furnace materials are uniformly melted, ⑨ direct current electric arc furnace has a strong stirring effect on metal melt, the alternating current electric arc furnace has no dead angle, and the direct current electric arc furnace can save 30% -3650%.
In the operation process of the electric arc furnace, as the electric conductivity of materials in the furnace changes fiercely and frequently, the arc current is often and suddenly increased or suddenly reduced, the electrode is required to be capable of reacting quickly, the size of the arc current is adjusted by adjusting the rising or falling of the electrode so as to achieve the aim of enabling the arc current to tend to be stable, and the rising or falling of the electrode is finally realized by depending on the driving of an electrode lifting control system, so that the requirements on the performance of the electrode lifting control system are provided, namely that the ① descending torque can be strictly controlled, ② has quick response capability, ③ starting torque is large, ④ operation speed range is wide, ⑤ has high overload capability, ⑥ electrode position control accuracy is high, and ⑦ low-speed operation is stable.
For an electrode lifting control system of a general direct current electric arc furnace, a frequency converter and a three-phase alternating current asynchronous variable frequency motor are adopted, and an open-loop control scheme is generally adopted. Because the common three-phase alternating current asynchronous variable frequency motor has no moment control function and the common frequency converter also has no moment control function, in the actual production application, the accident that the electrode is broken due to the overlarge dropping moment often occurs, and the inestimable loss is caused.
The common three-phase alternating current asynchronous variable frequency motor has small starting torque and poor response capability, cannot keep up with the speed of the change of the arc current, often causes the phenomenon of high-current impact high-voltage tripping, and particularly causes the great reduction of the power supply voltage and even tripping and power failure due to the slow reaction speed of the common three-phase alternating current asynchronous variable frequency motor at the moment of starting the arc furnace.
The same problem also exists with the hot stove in ordinary direct current ore deposit with direct current electric arc furnace, consequently need for an electrode lift control system urgently, can effectively avoid the hot stove in direct current electric arc furnace and direct current ore deposit to break the emergence of electrode accident because of the too big top of electrode dropping moment, avoids appearing the phenomenon of heavy current impact high voltage tripping operation simultaneously.
Disclosure of Invention
The utility model discloses an overcome prior art's defect, designed an improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit, can effectively avoid the hot stove of direct current electric arc furnace and direct current ore deposit to push up the emergence of outage utmost point accident because of electrode dropping force moment is too big, can effectively avoid appearing the phenomenon of heavy current impact high-pressure tripping operation simultaneously.
The utility model discloses a specific technical scheme that an improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit, including drive arrangement, the bracing piece of being connected with drive arrangement and the support arm that is used for fixed electrode, the support arm has the lift degree of freedom with the help of the cooperation of drive arrangement and bracing piece, the key lies in that control system still includes P L C controller, be provided with arc pressure measuring signal input, arc flow measuring signal input and given current signal input on the analog-to-digital conversion module of P L C controller, drive arrangement includes AC servo motor and servo driver, the output of P L C controller is connected with servo driver's input, servo driver's output and AC servo motor's input are connected, the support arm has the lift degree of freedom with the help of the cooperation of AC servo motor and bracing piece.
The driving device further comprises a speed reducer, an input shaft of the speed reducer is fixedly connected with an output shaft of the alternating current servo motor, and an output shaft of the speed reducer is connected with the supporting rod.
The support rod is a lead screw, the lower end of the lead screw is fixedly connected with an output shaft of the speed reducer, and the support arm is in threaded connection with the lead screw.
The support rod is a rack erected on one side of the speed reducer, a gear is fixed on an output shaft of the speed reducer, the gear is meshed with the rack, the support arm is fixedly connected with the rack, and the rack has a lifting degree of freedom under the driving of the speed reducer and the gear.
The power of the alternating current servo motor is 0.5-10 kW, the torque is 2-10 NM, and the rotating speed is 1000-3000 r/min.
The beneficial effects of the utility model are that adopt AC servo motor and servo driver to drive the lift of electrode, at first give the current signal, arc voltage measurement signal and arc current measurement signal input give P L C controller, calculate by P L C controller, give servo driver and send adjustment instruction, servo driver control AC servo motor carries out corresponding acceleration, slow down, stop, corotation, a series of actions such as reversal, and pass through bracing piece and support arm transmission to these actions for the electrode, thereby realize the position adjustment of electrode in the furnace body, finally make arc voltage and arc current be in the steady operation state, this kind of closed-loop control system can effectively avoid the emergence of direct current electric arc furnace and direct current ore deposit hot stove because of the too big and break the electrode accident of electrode decline moment, can effectively avoid appearing the phenomenon of heavy current impact high-pressure tripping operation simultaneously.
The utility model discloses a control system adopts alternating current servo motor, has following advantage:
1. the speed operation range is wide: the speed regulation range can reach 1: 5000, the high-speed performance is good, and the rated rotating speed can reach 3000 r/min;
2. the speed control characteristics are good: smooth control can be realized in the whole speed region, and almost no oscillation exists;
3. the velocity fluctuation rate is low: when the voltage fluctuates within the range of plus or minus 10 percent, the speed fluctuation rate is 0 percent;
4. the efficiency is high, and the heat generation is less;
5. the position control accuracy is high, the control on the arc length can reach a millimeter level, and the error is less than 0.1 mm;
6. the moment is adjustable: when the electrode is propped by a non-conductive object, the descending moment is not increased, and the accident that the electrode is propped off is thoroughly avoided;
7. the alternating current servo motor has low rotational inertia and short acceleration and deceleration time, and the dynamic response time of the acceleration and deceleration of the motor is generally within tens of milliseconds, so that the motor has extremely high dynamic response capability;
8. no autorotation phenomenon: when the adjustment is not carried out, the shaft is automatically locked by the AC servo motor, so that the phenomenon that the common asynchronous motor gradually slides down due to the dead weight of the electrode and the cross arm is avoided; the normally running AC servo motor is in a single-phase running state as long as the control voltage is lost, the AC servo motor immediately stops running and immediately locks the rotor, and the electrode is ensured to be adjusted to a required position without overshooting;
9. the device has extremely high overload capacity, reaches three times of rated torque, can adapt to instant load fluctuation and occasions requiring quick start, and is particularly suitable for electrode lifting control of an electric arc furnace and a submerged arc furnace;
10. the low-speed running is stable, and the step loss phenomenon similar to that of a stepping motor can not be generated;
11. the starting torque is large: because the rotor resistance of the AC servo motor is large, compared with the torque characteristic curve of the common asynchronous motor, the AC servo motor has obvious difference, and the critical slip ratio S0 can be more than 1, so that the torque characteristic (mechanical characteristic) is more close to linearity, and the AC servo motor has larger starting torque;
12. the AC servo motor operates stably and has low noise.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an electrical schematic diagram of the wiring between the P L C controller and the two servo drivers according to the present invention.
FIG. 3 is a simplified diagram of a # 1 AC servo motor and a # 1 servo driver.
FIG. 4 is a simplified diagram of a # 2 AC servo motor and a # 2 servo driver.
In the attached drawings, 1 represents a support rod, 2 represents a support arm, 3 represents an alternating current servo motor, 4 represents a speed reducer, 5 represents an electrode, and 6 represents a furnace body.
Detailed Description
The present invention will be described in detail with reference to the following drawings and specific embodiments:
the control system also comprises a P L C controller, an analog-to-digital conversion module of the P L C controller is provided with an arc voltage measurement signal input end, an arc current measurement signal input end and a given current signal input end, the driving device comprises an alternating current servo motor 3 and a servo driver, the output end of the P L C controller is connected with the input end of the servo driver, the output end of the servo driver is connected with the input end of the alternating current servo motor 3, the support arm 2 has the lifting freedom degree through the matching of the alternating current servo motor 3 and the support rod, the power of the alternating current servo motor 3 is 0.5-10 kW, 1.2 is preferred, the torque is 2-10 kW, 6NM is preferred, the rotating speed is 1000-3000 r/min, and r/min is preferred.
As right the utility model discloses a further improvement, drive arrangement still includes speed reducer 4, and speed reducer 4's input shaft and the output shaft fixed connection of exchanging servo motor 3, speed reducer 4's output shaft and bracing piece 1 are connected. The alternating current servo motor 3 drives the supporting rod 1 after being decelerated by the speed reducer 4, so that the condition that the lifting speed of the electrode 5 is too high is avoided.
The structure of bracing piece has a lot of, the utility model provides following two kinds:
firstly, the support rod 1 is a lead screw, the lower end of the lead screw is fixedly connected with an output shaft of the speed reducer 4, the support arm 2 is in threaded connection with the lead screw, as shown in fig. 1, the speed reducer 4 drives the lead screw to rotate, so that the support arm 2 drives the electrode 5 to ascend or descend together, the structure is simple, and the operation is convenient. In order to prevent the lead screw from inclining in the rotating process, a guide sleeve is fixed on the outer wall of the furnace body 6, the lead screw is inserted in the guide sleeve, and the lead screw is in threaded connection with the guide sleeve.
Secondly, the supporting rod 1 is a rack erected on one side of the speed reducer 4, a gear is fixed on an output shaft of the speed reducer 4, the gear is meshed with the rack, the supporting arm 2 is fixedly connected with the rack, and the rack has lifting freedom degree under the driving of the speed reducer 4 and the gear, so that the supporting arm 2 drives the electrode 5 to ascend or descend together.
The utility model discloses when specifically using, as shown in fig. 1, be provided with two electrodes 5 about in the furnace body 6, it is 1# electrode to set for left electrode, the electrode on right side is 2# electrode, then with 1# electrode corresponding be 1# servo driver, 1# exchanges servo motor, 1# speed reducer, 1# lead screw, 1# support arm, with 2# electrode corresponding be 2# servo driver, 2# exchanges servo motor, 2# speed reducer, 2# lead screw, 2# support arm 1# servo driver, the connected mode of 2# servo driver and P L C controller is shown in fig. 3 be connected with the touch-sensitive screen on the P L C controller, utilize the touch-sensitive screen can carry out operation control, and is simple and convenient to the P L C controller.
The utility model discloses at first, the arc that sets up on the analog-to-digital conversion module through P L C controller presses measuring signal input to 1# arc, 2# arc presses measuring signal input to give P L C controller, give current signal input to give P L C controller through the last given current signal input that sets up of analog-to-digital conversion module, through current transducer, the arc measurement signal input of digital conversion module gives P L C controller the arc measurement signal input, through calculating by P L C controller, give two servo driver send adjustment instruction, servo driver control AC servo motor 3 carries out corresponding acceleration, slow down, stop, corotation, a series of actions such as reversal, and pass through speed reducer 4 to these actions, lead screw and support arm 2 transmit for electrode 5, thereby realize the position adjustment of electrode 5 in furnace body 6, finally make arc voltage and arc current be in the steady operation state, this kind of closed-loop control system can effectively avoid direct current electric arc furnace and direct current ore deposit to push up the emergence of disconnected electrode 5 because of the too big moment accident, the high-voltage tripping phenomenon can effectively be avoided appearing simultaneously.
Claims (5)
1. An improved electrode lifting control system of a direct current arc furnace and a submerged arc furnace comprises a driving device, a supporting rod (1) connected with the driving device and a supporting arm (2) used for fixing an electrode (5), wherein the supporting arm (2) has lifting freedom degree by means of the matching of the driving device and the supporting rod (1), the electrode lifting control system is characterized by further comprising a P L C controller, an arc voltage measuring signal input end, an arc current measuring signal input end and a given current signal input end are arranged on an analog-to-digital conversion module of the P L C controller, the driving device comprises an alternating current servo motor (3) and a servo driver, the output end of the P L C controller is connected with the input end of the servo driver, the output end of the servo driver is connected with the input end of the alternating current servo motor (3), and the supporting arm (2) has the lifting freedom degree by means of the matching of the alternating current servo motor (3) and the supporting.
2. The improved electrode lifting control system for the direct current arc furnace and the submerged arc furnace as claimed in claim 1, wherein: the driving device further comprises a speed reducer (4), an input shaft of the speed reducer (4) is fixedly connected with an output shaft of the alternating current servo motor (3), and an output shaft of the speed reducer (4) is connected with the supporting rod (1).
3. The improved electrode lifting control system for the direct current arc furnace and the submerged arc furnace as claimed in claim 2, wherein: the support rod (1) is a lead screw, the lower end of the lead screw is fixedly connected with an output shaft of the speed reducer (4), and the support arm (2) is in threaded connection with the lead screw.
4. The improved electrode lifting control system for the direct current arc furnace and the submerged arc furnace as claimed in claim 2, wherein: the supporting rod (1) is a rack erected on one side of the speed reducer (4), a gear is fixed on an output shaft of the speed reducer (4), the gear is meshed with the rack, the supporting arm (2) is fixedly connected with the rack, and the rack has lifting freedom degree by means of driving of the speed reducer (4) and the gear.
5. The improved electrode lifting control system for the direct current arc furnace and the submerged arc furnace as claimed in claim 1, wherein: the power of the alternating current servo motor (3) is 0.5-10 kW, the torque is 2-10 NM, and the rotating speed is 1000-3000 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921951517.3U CN211084788U (en) | 2019-11-04 | 2019-11-04 | Improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921951517.3U CN211084788U (en) | 2019-11-04 | 2019-11-04 | Improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211084788U true CN211084788U (en) | 2020-07-24 |
Family
ID=71641580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921951517.3U Active CN211084788U (en) | 2019-11-04 | 2019-11-04 | Improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211084788U (en) |
-
2019
- 2019-11-04 CN CN201921951517.3U patent/CN211084788U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102777320A (en) | Torque and variable-pitch decoupling control method for wind driven generator set, controller and system thereof | |
| CN211084788U (en) | Improved generation direct current electric arc furnace, hot stove electrode lift control system in ore deposit | |
| CN103060516A (en) | Converter tilting frequency conversion timing control system | |
| CN205437125U (en) | Torpedo tank car controlling means | |
| CN102130649A (en) | Voltage regulation and speed regulation control system of full-digital speed and current double closed-loop alternating current motor | |
| CN203768431U (en) | Electroslag remelting furnace | |
| CN201669433U (en) | Electric chuck | |
| CN2741948Y (en) | Controller for AC crane speed regulation | |
| CN211321243U (en) | High-voltage intelligent dynamic voltage-regulating reactive power compensation device | |
| CN207330191U (en) | A kind of swing mechanism using rcv controllers | |
| CN213651642U (en) | Tower machine gyration frequency conversion control system | |
| CN217230038U (en) | High-efficient environmental protection tower crane based on new forms of energy technique | |
| CN101465194B (en) | On-load adjustable stepless voltage-stabilizing transformer | |
| CN207330190U (en) | A kind of jib lubbing mechanism using frequency-variable controller | |
| CN201512374U (en) | Tower type crane swinger vortex controller | |
| CN108502748A (en) | A kind of power equipment undercarriage | |
| CN215974784U (en) | Vertical folding type isolating switch holding pole hydraulic lifting device | |
| CN211279931U (en) | Pressing speed control system of press | |
| CN216444366U (en) | Energy-saving control device for tank production conveying line | |
| CN214455735U (en) | Alternating current differential winding machine based on direct current bus sharing | |
| CN201928223U (en) | Direct current governor system of pipe mill | |
| CN216137161U (en) | Electric mixer | |
| CN202072401U (en) | Variable frequency speed regulation energy-saving control travelling crane | |
| CN220745312U (en) | Power transmission and transformation debugging lifting maintenance platform | |
| CN216807990U (en) | Lifting device for mounting power equipment for power engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220712 Address after: 455000 northwest corner of the intersection of Huaxiang Road and Angang Avenue, Yindu District, Anyang City, Henan Province Patentee after: Anyang younengde Electric Co.,Ltd. Address before: 455000 No.1, unit 1, building 4, yard 1, Yong'an street, Beiguan District, Anyang City, Henan Province Patentee before: Song Xiqing Patentee before: Song Baoqing |