CN211531366U - Automatic lifting device for electrode bar of electric arc furnace - Google Patents
Automatic lifting device for electrode bar of electric arc furnace Download PDFInfo
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- CN211531366U CN211531366U CN201922383903.3U CN201922383903U CN211531366U CN 211531366 U CN211531366 U CN 211531366U CN 201922383903 U CN201922383903 U CN 201922383903U CN 211531366 U CN211531366 U CN 211531366U
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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
Abstract
The utility model discloses an electric arc furnace electrode bar automatic lifting device, this electric arc furnace electrode bar automatic lifting device are equipped with hoist engine and loose pulley assembly including the support frame of locating the electric arc furnace rear side on the support frame, and the hoist engine is connected to the electrode bar through the wire rope of twining on loose pulley assembly, still includes current sensor and the positive reverse control system of motor, and current sensor is used for detecting the electric current size on the supply circuit of electrode bar, and current sensor signal connection is to the positive reverse control system of motor. This electric arc furnace electrode bar automatic lifting device's motor is just reversing control system can realize the lift of automatic control electric arc furnace electrode bar according to the motor of current sensor's signal control hoist engine is just reversing, and real-time supervision, can in time control go up and down, prevents the error that manual operation brought to save the manual work, reduced the recruitment cost.
Description
Technical Field
The utility model relates to a refractory material produces technical field, concretely relates to electric arc furnace electrode bar automatic lifting device.
Background
The electric arc furnace smelting is to melt materials by utilizing heat generated by electric arcs generated between electrode rods and the materials to be melted, such as iron, aluminum powder and the like. The electric arc furnace is generally provided with two or three electrode bars, in the process of melting materials, if the electrode bars are in contact with the materials for a long time, the current in the electrode bars and the power supply circuit thereof can rise, if the current is too high, the load of the power supply circuit can be too heavy, at the moment, the electrode bars need to be lifted upwards to be separated from the materials in the electric arc furnace, when the electrode bars rise to be separated from the materials in the electric arc furnace, the current in the power supply circuit connected with the electrode bars can fall immediately, when the current in the power supply circuit connected with the electrode bars falls to a certain degree, the electrode bars fall and are in contact with the materials in the electric arc furnace, and the current in the power supply circuit is controlled within a.
At present, there are many ways for an electrode rod lifting device of an electric arc furnace, for example, chinese patent publication No. CN101925210A describes an electrode lifting device, which adopts a ball screw way to achieve the lifting purpose; chinese patent publication No. 209193478U describes a hydraulic electrode lifting device for a ferroboron furnace, which employs a hydraulic system; chinese patent publication No. CN209131370U describes a lifting mechanism for a self-baking electrode of a brown fused alumina arc furnace, which adopts a wire rope type. However, the above-mentioned methods only lift one electrode rod.
In addition, an electrode rod lifting control table is generally provided in a conventional arc furnace, an ammeter is provided on the control table to observe the magnitude of current in a power supply circuit of the electrode rod, and a lift button and a lower button are provided on the control table, and a dedicated operator is assigned to press the lift button and the lower button in time according to the current value displayed by the ammeter, and the lift button and the lower button control the lifting of the electrode rod by controlling the forward and reverse rotation of a motor (a ball screw type lifting device or a wire rope type lifting device) or controlling the extension and contraction of a hydraulic cylinder (a hydraulic type lifting device). This kind goes up and down through manual mode control, needs operating personnel to be absorbed in for a long time and observes, and degree of being absorbed in, the careful degree requirement to operating personnel is higher, the mistake appears easily, and increases the recruitment cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric arc furnace electrode bar automatic lifting device, the technical problem that the lift of electric arc furnace electrode bar needs special operating personnel to control among the solution prior art.
In order to solve the technical problem, the utility model discloses a technical scheme:
the design is that an automatic lifting device of an electric arc furnace electrode rod comprises a supporting frame arranged on the rear side of the electric arc furnace, wherein a winch and a pulley assembly are arranged on the supporting frame, the winch is connected to the electrode rod through a steel wire rope wound on the pulley assembly, the automatic lifting device further comprises a current sensor and a motor forward and reverse rotation control system, the current sensor is used for detecting the current on a power supply circuit of the electrode rod, and the current sensor is in signal connection with the motor forward and reverse rotation control system to control the motor forward and reverse rotation of the winch according to signals of the current sensor.
Preferably, the motor forward and reverse rotation control system comprises a main circuit and a control circuit, the main circuit comprises a motor forward relay and a motor reverse relay, a motor of the winch is connected to a motor driving power supply through the motor forward relay and the motor reverse relay, and the control circuit is used for correspondingly controlling the motor forward relay and the motor reverse relay to act.
Preferably, the control circuit comprises a processor, a first triode, a second triode and a power module, the current sensor is connected to the input end of the processor through signals, the base electrodes of the first triode and the second triode are connected to the output end of the processor, the collector electrode and the emitter electrode of the first triode are connected to the control coil of the motor forward rotation relay in series, and the collector electrode and the emitter electrode of the second triode are connected to the control coil of the motor reverse rotation relay in series.
Preferably, the pulley assembly comprises a left vertical pulley, a middle vertical pulley and a right vertical pulley which are correspondingly arranged above the three electrode bars of the electric arc furnace, and a left horizontal pulley and a right horizontal pulley are respectively arranged behind the left vertical pulley and the right vertical pulley; the top of an electrode rod on the left side above the electric arc furnace is connected with a first branch steel wire rope, the top of an electrode rod in the middle is connected with a second branch steel wire rope, the top of an electrode rod on the right side is connected with a third branch steel wire rope, the first branch steel wire rope sequentially winds through the left vertical pulley and the left horizontal pulley and then is connected to the steel wire rope on the winch, the second branch steel wire rope winds through the middle vertical pulley and then is connected to the steel wire rope on the winch, and the third branch steel wire rope winds through the right vertical pulley and the right horizontal pulley and then is connected to the steel wire rope on the.
Preferably, the pulley assembly comprises three vertical pulleys correspondingly arranged above the three electrode rods of the electric arc furnace; the winch comprises three steel wire rope rollers arranged on the same rotating shaft and a motor for driving the rotating shaft, wherein a steel wire rope on each steel wire rope roller is wound by a corresponding vertical pulley and is connected to the upper end of a corresponding electrode rod.
Preferably, a connecting assembly is arranged at the top of the electrode rod, the connecting assembly comprises two halves of arc-shaped hoops corresponding to the electrode rod and an inverted U-shaped hanging piece, connecting lugs are arranged on two sides of each arc-shaped hoop, and the connecting lugs of the two halves of arc-shaped hoops are connected through bolts; the two sides of the inverted U-shaped hanging piece are respectively provided with a connecting clamp plate, the top of the inverted U-shaped hanging piece is provided with a lifting lug, and the connecting lugs of the arc-shaped hoops which are connected together are installed in the connecting clamp plates through pin shafts.
Preferably, the control circuit is further provided with an emergency button, the emergency button is a normally open switch, and the emergency button is connected in parallel between the emitter and the collector of the first triode.
The utility model discloses a main beneficial technological effect lies in:
1. the utility model provides an electric arc furnace electrode bar automatic lifting device is equipped with current sensor and motor just reversal control system, current sensor is used for detecting the electric current size on the supply circuit of electrode bar, current sensor signal connection is to the motor just reversal control system, the motor just reverses control system and can just reverses according to the motor of current sensor's signal control hoist engine, realizes the lift of automatic control electric arc furnace electrode bar, and real-time supervision, can in time control go up and down, prevent the mistake that manual operation brought.
2. Because the motor forward and backward rotation control system is adopted for operation and control, the labor is saved, and the labor cost is reduced.
3. The hoist and the pulley assembly that this electric arc furnace electrode bar automatic lifting device set up can once only promote or descend three electrode bars, and the elevating gear structure is simple and convenient, and only need control a motor can, the automatic control of hoist is more convenient.
Drawings
Fig. 1 is a front view of an embodiment of the automatic lifting device for electrode rods of an electric arc furnace of the present invention.
Fig. 2 is a top view of a hoist and a pulley assembly on a supporting frame in an embodiment of the automatic lifting device for an electrode rod of an electric arc furnace of the present invention.
Fig. 3 is a circuit block diagram of a motor forward and backward rotation control system in an embodiment of the automatic lifting device for the electrode rod of the electric arc furnace of the present invention.
Fig. 4 is a schematic circuit diagram of the electric arc furnace electrode bar automatic lifting device in an embodiment of the present invention, wherein the motor is connected with the motor forward rotation relay and the motor reverse rotation relay.
Fig. 5 is an original circuit diagram of the control coil of the electric arc furnace electrode bar automatic lifting device according to an embodiment of the present invention, in which the first triode is connected to the motor forward rotation relay.
Fig. 6 is a top view of a winch and a pulley assembly on a supporting frame in another embodiment of the automatic lifting device for an electrode rod of an electric arc furnace of the present invention.
Fig. 7 is an exploded view of the connecting assembly in an embodiment of the automatic lifting device for electrode rods of an electric arc furnace of the present invention.
In the drawings, each reference numeral means: the electric arc furnace comprises an electric arc furnace 11, an electrode rod 12, a support frame 2, a support column 21, a support platform 22, a left vertical pulley 31, a middle vertical pulley 32, a right vertical pulley 33, a left horizontal pulley 34, a right horizontal pulley 35, a first branch steel wire rope 36, a second branch steel wire rope 37, a third branch steel wire rope 38, a steel wire rope 41, a motor 42, a speed reducer 43, a steel wire rope roller 44, a rotating shaft 45, a chain 46, a main circuit 51, a control circuit 52, a vertical pulley 6, an arc-shaped hoop 71, a connecting lug 711, a screw hole 712, a pin shaft hole 713, an inverted U-shaped hanging part 72, a connecting clamping plate 721 and a.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example 1:
an automatic lifting device for electrode rod of arc furnace is disclosed, please refer to fig. 1 to 5.
As shown in fig. 1, the embodiment of the utility model provides an electric arc furnace electrode bar automatic lifting device is including the support frame 2 of locating the electric arc furnace 11 rear side, and support frame 2 mainly used supports the hoist mechanism who promotes three electrode bars 12 on the electric arc furnace 11, and support frame 2 includes many pillars 21 that support in ground, and the top of pillar 21 is equipped with supporting platform 22, and hoist mechanism is equipped with hoist engine and loose pulley assembly including setting up on supporting platform 22, and the hoist engine is connected to each electrode bar 12 through the wire rope of twining on loose pulley assembly.
As shown in fig. 2, in the present embodiment, the pulley assembly includes a left vertical pulley 31, a middle vertical pulley 32 and a right vertical pulley 33 which are correspondingly disposed above the three electrode rods 12 of the arc furnace, and since the three electrode rods 12 are arranged in a triangle, the left vertical pulley 31, the middle vertical pulley 32 and the right vertical pulley 33 are also arranged in a triangle.
The rear parts of the left vertical pulley 31 and the right vertical pulley 33 are respectively provided with a left horizontal pulley 34 and a right horizontal pulley 35, the top of a left electrode rod above the electric arc furnace is connected with a first branch steel wire rope 36, the top of a middle electrode rod is connected with a second branch steel wire rope 37, the top of a right electrode rod is connected with a third branch steel wire rope 38, the first branch steel wire rope 36 sequentially winds through the left vertical pulley 31 and the left horizontal pulley 34 and is connected to a steel wire rope 41 on a winch, the second branch steel wire rope 37 winds through the middle vertical pulley 32 and is connected to the steel wire rope 41 on the winch, the third branch steel wire rope 38 winds through the right vertical pulley 33 and the right horizontal pulley 35 and is connected to the steel wire rope 41 on the winch, and the first branch steel wire rope 36, the second branch steel wire rope 37, the third branch.
The motor 42 of the winch is connected with the steel wire rope roller 44 through the speed reducer 43, the steel wire rope 41 is wound on the steel wire rope roller 44, the motor 42 is started to rotate forwards or backwards, and the three electrode rods 12 can be driven to ascend or descend simultaneously.
When melting materials such as iron, aluminum powder and the like in the electric arc furnace 11, the three electrode rods 12 descend and contact with the materials in the furnace, release heat by generating the electric arc and finally melt the materials, if the electrode rods 12 are in contact with the material for too long a time in the process of melting the material, the current in the power supply circuit connected with the electrode rods 12 is continuously increased, so that the load of the power supply circuit is too heavy, at the moment, three electrode rods 12 need to be lifted upwards to separate from the material in the electric arc furnace 11, when the three electrode rods 12 rise to a certain height, the three electrode rods are separated from the material in the electric arc furnace 11, the current in the power supply circuit connected with the electrode rods 12 is immediately reduced, when the current in the power supply line connected with the electrode rods 12 is reduced to a certain degree, the three electrode rods 12 are reduced and contacted with the material in the electric arc furnace 11, and the current in the power supply line is controlled within a reasonable range by repeatedly adjusting the three electrode rods 12.
Therefore, the electric hoist further comprises a current sensor and a motor forward and backward rotation control system, the current sensor in the embodiment adopts a Hall current sensor with the model number of QKC8000HB, the current sensor is used for detecting the current on a power supply circuit of the electrode bar, and the current sensor is connected to the motor forward and backward rotation control system in a signal mode so as to control the forward and backward rotation of the motor of the hoist according to the signal of the current sensor.
Further, as shown in fig. 3, the motor forward/reverse rotation control system in this embodiment includes a main circuit 51 and a control circuit 52, where the main circuit 51 includes a motor forward rotation relay and a motor reverse rotation relay, as shown in fig. 4, a motor of the winch is connected to a motor driving power supply through the motor forward rotation relay KM1, the motor reverse rotation relay KM2 and the fuse RU, the motor driving power supply is 380V industrial alternating current, and the control circuit is used for correspondingly controlling the motor forward rotation relay and the motor reverse rotation relay to operate.
As further shown in fig. 3, the control circuit 52 includes a processor, a first triode, a second triode and a power module, the processor in this embodiment adopts a single chip or a PLC, the power module firstly converts a 380V ac voltage into a 15V dc voltage, and then converts the 15V dc voltage into a 3.3V dc voltage, the 15V dc voltage is used as a driving voltage of a coil of the motor forward relay, the motor reverse relay and the current sensor, and the 3.3V dc voltage is used as a working voltage of the processor.
The current sensor is electrically connected to the input end of the processor to transmit signals, the base electrodes of the first triode and the second triode are both connected to the output end of the processor, the processor judges whether the motor of the winch needs to rotate or not according to the signals of the current transmitted by the current sensor, and whether the motor needs to rotate forwards or reversely, as shown in fig. 5, taking the control of the first triode Q1 on the motor forward rotation relay KM1 as an example, the collector electrode and the emitter electrode of the first triode Q1 are connected in series to the control coil of the motor forward rotation relay, when the processor judges that the motor needs to rotate forwards, a signal is sent to the base electrode of the first triode Q1, the first triode Q1 is conducted, the control coil of the motor forward rotation relay KM1 is electrified, the motor forward rotation relay KM 1. Similarly, the collector and emitter of the second triode are connected in series with the control coil of the motor reversal relay.
As further shown in fig. 5, the control circuit is further provided with an emergency button K, the emergency button K is a normally open switch, and the emergency button K is connected in parallel between the emitter and the collector of the first triode Q1. When the motor rotates forwards, the electrode rod rises, and in case of failure of the control system, the emergency button K can be pressed down, so that the electrode rod is driven to rise to separate from the material.
The automatic lifting control of the electrode rod can be realized by arranging the current sensor and the motor forward and backward rotation control system, and the labor is saved.
Example 2:
an automatic lifting device for electrode bar of arc furnace is disclosed, please refer to fig. 6 and 7.
As shown in fig. 6, the difference from embodiment 1 is that the pulley assembly of the automatic lifting device for electrode bars of an electric arc furnace in this embodiment includes three vertical pulleys 6 correspondingly disposed above the three electrode bars 12 of the electric arc furnace, the hoist includes three wire rope drums 44 mounted on the same rotating shaft 45, and a motor 42 driving the rotating shaft 45, an output shaft of the motor 42 is connected with a reducer 43, and the reducer 43 drives the rotating shaft 45 to rotate through a chain 46. The steel wire 41 on each steel wire roller 44 is wound around the corresponding vertical pulley 6 and connected to the upper end of the corresponding electrode bar 12, and the motor 42 rotates to drive the three electrode bars 12 to lift.
Furthermore, in order to facilitate the connection between the steel wire rope and the electrode rod 12, the top of the electrode rod 12 is provided with a connecting assembly as shown in fig. 7, the connecting assembly comprises two halves of arc-shaped hoops 71 corresponding to the electrode rod 12 and an inverted U-shaped hanging piece 72, two sides of the arc-shaped hoops 71 are provided with connecting lugs 711, the connecting lugs 711 are provided with screw holes 712, and when the two arc-shaped hoops 71 surround the electrode rod 12, the connecting lugs 711 of the two halves of arc-shaped hoops 71 are connected through bolts. The two sides of the inverted U-shaped hanging piece 72 are respectively provided with a connecting clamp plate 721, the connecting lugs 711 are provided with pin shaft holes 713, corresponding pin shaft holes are arranged between the connecting clamp plates 721, and the connecting lugs 711 of the connected arc-shaped hoops 71 are arranged in the connecting clamp plates 721 through pin shafts. A lifting lug 722 is arranged at the top of the inverted U-shaped hanging piece 72, and the steel wire rope is fixed through a lock catch after penetrating into the lifting lug 722.
The lifting mechanism in this embodiment also enables the three electrode rods 12 to be lifted and lowered simultaneously.
The present invention has been described in detail with reference to the accompanying drawings and embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention to form a plurality of specific embodiments, which are the common variation ranges of the present invention and will not be described in detail herein.
Claims (7)
1. The utility model provides an electric arc furnace electrode bar automatic lifting device, is including locating the support frame of electric arc furnace rear side be equipped with hoist engine and loose pulley assembly on the support frame, the hoist engine through twine in the last wire rope of loose pulley assembly is connected to the electrode bar, its characterized in that still includes current sensor and motor just reverse control system, current sensor is used for detecting the electric current size on the power supply circuit of electrode bar, current sensor signal connection to the motor just reverse control system for be used for according to current sensor's signal control the motor of hoist engine is just reverse.
2. The automatic lifting device of the electrode rod of the electric arc furnace as claimed in claim 1, wherein the motor forward and reverse rotation control system comprises a main circuit and a control circuit, the main circuit comprises a motor forward relay and a motor reverse relay, the motor of the winch is connected to a motor driving power supply through the motor forward relay and the motor reverse relay, and the control circuit is used for correspondingly controlling the motor forward relay and the motor reverse relay to act.
3. The automatic lifting device for electrode bars of electric arc furnace as claimed in claim 2, wherein the control circuit comprises a processor, a first triode, a second triode and a power module, the current sensor is connected to the input end of the processor in signal, the base electrodes of the first triode and the second triode are connected to the output end of the processor, the collector electrode and the emitter electrode of the first triode are connected in series to the control coil of the motor forward relay, and the collector electrode and the emitter electrode of the second triode are connected in series to the control coil of the motor reverse relay.
4. The automatic lifting device of the electrode bar of the electric arc furnace according to claim 1, wherein the pulley assembly comprises a left vertical pulley, a middle vertical pulley and a right vertical pulley which are correspondingly arranged above the three electrode bars of the electric arc furnace, and a left horizontal pulley and a right horizontal pulley are respectively arranged behind the left vertical pulley and the right vertical pulley; the top of an electrode rod on the left side above the electric arc furnace is connected with a first branch steel wire rope, the top of an electrode rod in the middle is connected with a second branch steel wire rope, the top of an electrode rod on the right side is connected with a third branch steel wire rope, the first branch steel wire rope sequentially winds through the left vertical pulley and the left horizontal pulley and then is connected to the steel wire rope on the winch, the second branch steel wire rope winds through the middle vertical pulley and then is connected to the steel wire rope on the winch, and the third branch steel wire rope winds through the right vertical pulley and the right horizontal pulley and then is connected to the steel wire rope on the.
5. The automatic lifting device of the electrode bar of the electric arc furnace as claimed in claim 1, wherein the pulley assembly comprises three vertical pulleys correspondingly arranged above the three electrode bars of the electric arc furnace; the winch comprises three steel wire rope rollers arranged on the same rotating shaft and a motor for driving the rotating shaft, wherein a steel wire rope on each steel wire rope roller is wound by a corresponding vertical pulley and is connected to the upper end of a corresponding electrode rod.
6. The automatic lifting device of an electric arc furnace electrode bar according to claim 1, characterized in that a connecting assembly is arranged on the top of the electrode bar, the connecting assembly comprises two halves of an arc-shaped hoop corresponding to the electrode bar and an inverted U-shaped hanging piece, two sides of the arc-shaped hoop are provided with connecting lugs, and the two halves of the arc-shaped hoop are connected through bolts; the two sides of the inverted U-shaped hanging piece are respectively provided with a connecting clamp plate, the top of the inverted U-shaped hanging piece is provided with a lifting lug, and the connecting lugs of the arc-shaped hoops which are connected together are installed in the connecting clamp plates through pin shafts.
7. The automatic lifting device of electrode bar of electric arc furnace as claimed in claim 3, wherein said control circuit is further provided with an emergency button, said emergency button is a normally open switch, and said emergency button is connected in parallel between the emitter and collector of said first triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922383903.3U CN211531366U (en) | 2019-12-26 | 2019-12-26 | Automatic lifting device for electrode bar of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922383903.3U CN211531366U (en) | 2019-12-26 | 2019-12-26 | Automatic lifting device for electrode bar of electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211531366U true CN211531366U (en) | 2020-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922383903.3U Active CN211531366U (en) | 2019-12-26 | 2019-12-26 | Automatic lifting device for electrode bar of electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211531366U (en) |
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2019
- 2019-12-26 CN CN201922383903.3U patent/CN211531366U/en active Active
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