An electric furnace device with integrated multiple power supply structures

Abstract

The present invention provides an electric furnace device with an integrated multiple power supply structure, including a furnace body device, a furnace cover device, an electrode lifting system, a power supply system and a short-circuit device. The furnace body device is composed of a furnace body, a furnace tilting motor, a furnace body support base and a furnace bottom electrode. The furnace cover device is composed of a furnace cover and a furnace cover track. The electrode lifting system adopts a trolley-type cross arm column lifting structure, driven by a motor reducer, driven by a transmission assembly, manually clamped electrodes, and copper bars are conductive. The three-phase controllable polarity power supply system includes a transformer device, a power supply cabinet and a reactor. The short-circuit device refers to a conductive line from the secondary outlet end of the transformer to the tail end of the electrode cross arm, which is a comprehensive name for conductive copper pipes, conductive copper bars, soft connection compensators, water-cooled cables, and conductive soft wires. The present invention can realize three power supply structures on an electric furnace, namely, three-phase AC power supply, unipolar DC power supply, and three-phase controllable polarity power supply, so as to realize multiple uses of one furnace.

Description

Technical Field

[0001] The invention relates to an electric furnace device, in particular to an electric furnace device with integrated multiple power supply structures. Background Art

[0002] An electric furnace powered by three-phase AC is called an AC furnace. The external power supply is through a transformer device and a short-circuit structure to supply 50Hz three-phase AC power to the furnace; the AC furnace has three sets of lifting electrodes. An electric furnace powered by unipolar DC is called a DC furnace. The external power supply is through a transformer device, a rectifier power system, and a short-circuit structure to supply 0Hz DC power to the furnace; the DC furnace has a bottom electrode and a set of lifting electrodes. An electric furnace powered by three-phase controllable polarity is called a three-phase controllable polarity electric furnace. The external power supply is through a transformer device, a three-phase controllable polarity inverter power system, and a short-circuit structure to supply 0-0.1Hz ultra-low frequency DC power to the furnace; the three-phase controllable polarity electric furnace has three sets of lifting electrodes. The three power supply structures produce different heating effects in the furnace.

[0003] In general industrial production, one electric furnace device will choose one power supply structure for power supply; in the laboratory, due to the need to study the influence of different heating effects on material smelting, electric furnaces with three different power supply structures are often used; then, a laboratory with this demand will have to purchase at least three electric furnaces to meet the experimental needs.

[0004] The existing laboratory electric furnace equipment is a simple three-phase AC furnace, or a single-pole DC furnace, or a three-phase controllable polarity furnace; few laboratories have electric furnace experimental equipment with three power supply structures at the same time. When it is necessary to conduct smelting research on different power supply structures of a certain material, most laboratories do not have the experimental conditions; compared with industrial production equipment, laboratory equipment has a small capacity and low frequency of use; therefore, laboratories usually do not purchase three of the same type of equipment for one or several experiments. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an electric furnace device with an integrated multiple power supply structure in view of the deficiencies of the above-mentioned prior art. The structural design of the device is scientific and reasonable, and can realize three power supply structures of three-phase AC power supply, unipolar DC power supply, and three-phase controllable polarity power supply on one electric furnace. It has great scientific research value and broad scientific research prospects.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an electric furnace device with integrated multiple power supply structures, characterized in that it includes a furnace body device, a furnace cover device, an electrode lifting system, a power supply system and a short network system;

[0007] The furnace body device comprises a furnace body, a furnace tilting motor, a furnace body support base and a furnace bottom electrode. The furnace body and the furnace tilting motor are installed on the furnace body support base. The furnace body is provided with two upper and lower furnace outlets, the upper part is a dumping furnace outlet and the bottom part is a discharge furnace outlet. The furnace tilting motor is arranged on the side of the furnace body and the furnace tilting motor drives the furnace body to dump the materials in the furnace body through the dumping furnace outlet. The furnace bottom electrode is arranged at the bottom of the furnace body, and a conductive copper bar is used to clamp the furnace bottom electrode as a conductive structure;

[0008] The furnace cover device comprises a top cover and a top cover track, wherein the top cover track comprises a first track arranged on the furnace body and a second track arranged on an independent track bracket, wherein the first track and the second track can be used in a butt-jointed manner or can be used independently, and the top cover is connected to the top cover track via a roller;

[0009] The electrode lifting system is a trolley-type horizontal arm column lifting structure;

[0010] The power supply system includes a transformer, a power supply cabinet and a reactor, and the power supply cabinet is a three-phase controllable polarity power supply cabinet;

[0011] The short-circuit system refers to the conductive line from the secondary outlet of the transformer to the tail end of the electrode cross arm, including the AC bus, the current conversion bus, the lifting electrode short-circuit, the furnace bottom electrode bus and the conversion soft connection;

[0012] The furnace bottom electrode is connected to the power cabinet via a reactor, and the motor lifting system is conductively connected to the power cabinet via a short-circuit device.

[0013] Preferably, the electrode lifting system includes three conductive cross arms, three columns and column brackets, the columns are arranged on the column brackets, the conductive cross arms are vertically connected to the columns, a reduction motor for driving the conductive cross arms is arranged on the columns, the reduction motor is transmission-connected to the conductive cross arms through a transmission assembly, the tail end of the conductive cross arm is conductively connected to the short-circuit system, a conductive copper busbar is arranged at the head end of the conductive cross arm, and the three conductive cross arms are respectively marked with 1# conductive cross arm, 2# conductive cross arm and 3# conductive cross arm.

[0014] Preferably, the AC bus is a conductive line connecting the transformer and the power cabinet, marked with A wire, B wire and C wire; the converter bus is the output line of the power cabinet, marked with U wire, V wire and W wire; the lifting electrode short network is a conductive line connecting three conductive cross arms, marked with a wire, b wire and c wire respectively; the furnace bottom electrode bus is a conductive line connecting the furnace bottom electrode and the power cabinet, and the reactor is connected in series in the furnace bottom electrode bus; the conversion soft connection is a section of soft connection compensator.

[0015] Preferably, the top cover is made of a steel plate, and is provided with a feeding port, an observation port and a dust collecting port.

[0016] Preferably, when the conversion soft connection connects the A wire, B wire, and C wire to the lifting electrode short net a wire, b wire, and c wire respectively, the power supply cabinet is not connected to the power supply system, and the electric furnace equipment is a three-phase AC arc furnace. At this time, the electrical control system does not control the power supply cabinet. When the conversion soft connection connects the AC busbar U wire, V wire, and W wire to the lifting electrode short net a wire, b wire, and c wire respectively, the power supply cabinet is fully connected to the power supply system, and the electric furnace equipment is a three-phase controllable polarity low-frequency arc furnace. At this time, the electrical control system fully controls the power supply cabinet. When the conversion soft connection connects the AC busbar V wire and W wire to the lifting electrode short net b wire and the bottom electrode bus respectively, the power supply cabinet is partially connected to the power supply system, and the electric furnace equipment is a unipolar DC arc furnace. At this time, the electrical control system partially controls the power supply cabinet, and at the same time, it is necessary to remove the 1# conductive cross arm and the 3# conductive cross arm and lengthen the 2# conductive cross arm so that the 2# conductive cross arm can be used as a cathode. In addition, when the conversion soft connection connects the AC bus U wire and W wire to the lifting electrode short network a wire and c wire respectively, the power supply cabinet device is partially connected to the power supply system, and the 2# conductive cross arm is removed and the position of the 1# and 3# conductive cross arms is adjusted. At this time, the electrical control system partially controls the power supply cabinet and realizes different power supply structures according to different control methods. The electric furnace equipment is a two-electrode low-frequency arc furnace with controllable polarity or a two-electrode DC arc furnace.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention has a scientific and reasonable structural design, is easy to operate, and has high scientific research value. It can realize three power supply structures on an electric furnace: three-phase AC power supply, unipolar DC power supply, and three-phase controllable polarity power supply.

[0019] 2. The present invention can be used for two furnace unloading methods: flowing and dumping. It can be used for smelting with or without a furnace cover, can be used for dumping with or without a furnace cover, and can be used for rapid disassembly and assembly of the cross arm. These are convenient for changing the furnace structure under different experimental conditions and for experimental research.

[0020] 3. The present invention can realize three different power supply structures on one electric furnace, realizing the function of one furnace for multiple purposes, so that unipolar DC power supply and three-phase controllable polarity power supply are carried out using the same set of power supply cabinet devices, realizing the function of one cabinet for two purposes, and realizing the process of short network bus connection transformation with a simple section of soft connection compensator, realizing the simplification of various transformations of short network.

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a top view structural schematic diagram of the furnace body device and the furnace cover device in the present invention.

[0024] Description of reference numerals:

[0025] 1—furnace body; 2—furnace tilting motor; 3—furnace body support base;

[0026] 4—furnace bottom electrode; 5—top cover; 6—track bracket;

[0027] 7—Transformer; 8—Power supply cabinet; 9—Reactor;

[0028] 10—column; 11—column bracket; 12—reduction motor;

[0029] 13—transmission assembly; 14—cross arm conductive copper bar; 15—1# conductive cross arm;

[0030] 16—2# conductive cross arm; 17—3# conductive cross arm; 18—A conductor;

[0031] 19—B conductor; 20—C conductor; 21—U conductor;

[0032] 22—V wire; 23—W wire; 24—a wire;

[0033] 25—b conductor; 26—c conductor; 27—bottom electrode busbar;

[0034] 28—Feeding port; 29—Observation port; 30—Dust collection port. DETAILED DESCRIPTION

[0035] like Figure 1 and Figure 2 As shown, the present invention includes a furnace body device, a furnace cover device, an electrode lifting system, a power supply system and a short network system;

[0036] The furnace body device comprises a furnace body 1, a furnace tilting motor 2, a furnace body support base 3 and a furnace bottom electrode 4. The furnace body 1 and the furnace tilting motor 2 are installed on the furnace body support base 3. The furnace body 1 is provided with two upper and lower furnace outlets, the upper part is a dumping furnace outlet, and the bottom part is a discharge furnace outlet. The furnace tilting motor 2 is arranged on the side of the furnace body 1, and the furnace tilting motor 2 pushes the furnace body 1 to dump the material in the furnace body 1 through the dumping furnace outlet. The furnace bottom electrode 4 is arranged at the bottom of the furnace body 1, and a conductive copper bar is used to clamp the furnace bottom electrode 4 as a conductive structure;

[0037] The furnace cover device includes a top cover 5 and a top cover track. The top cover track includes a first track arranged on the furnace body and a second track installed on an independent track bracket 6. The first track and the second track can be used in conjunction with each other or can be used independently. The top cover 5 is connected to the top cover track through rollers. The first track is fixed to the furnace body at the front section and tilts with the furnace body, and the second track is fixed to the track bracket 6 at the rear section and remains stationary. When the furnace body 1 is horizontal and does not tilt, the first track and the second track are perfectly docked, and the top cover 5 can run on the first track and the second track; when the furnace is tilted, the first track moves forward with the furnace body, and the second track is fixed. Because the movement direction of the first track is forward, the two will not interfere with each other.

[0038] The electrode lifting system is a trolley-type horizontal arm column lifting structure;

[0039] The power supply system includes a transformer 7, a power supply cabinet 8 and a reactor 9, wherein the power supply cabinet 8 is a three-phase controllable polarity power supply cabinet;

[0040] The short-circuit system refers to the conductive line from the secondary outlet of the transformer to the tail end of the electrode cross arm, including the AC bus, the current conversion bus, the lifting electrode short-circuit, the furnace bottom electrode bus and the conversion soft connection;

[0041] The furnace bottom electrode 4 is connected to the power supply cabinet 8 via a reactor 9, and the motor lifting system is conductively connected to the power supply cabinet 8 via a short-circuit device.

[0042] In this embodiment, a pure water cooling device is provided in the power cabinet 8 for cooling the thyristor device, and the reactor 9 is a DC smoothing reactor for rectifying the power supply.

[0043] In this embodiment, the electrode lifting system includes three conductive cross arms, three columns 10 and a column bracket 11. The three columns 10 are arranged on the column bracket 11. The conductive cross arms are vertically connected to the columns 10. The columns are provided with a reduction motor 12 for driving the conductive cross arms. The reduction motor 12 is connected to the conductive cross arms through a transmission assembly 13. The transmission assembly includes a lead screw and a nut. The lead screw is installed parallel to the column 10. The reduction motor 12 drives the lead screw to rotate, which is converted into a lifting motion of the lead screw and the nut, driving the conductive cross arms to lift. Each conductive cross arm is equipped with its own set of transmission assemblies 13, reduction motors 12 and columns 10. The tail end of the conductive cross arm is connected to the short network system. The head end of the conductive cross arm is provided with a cross arm conductive copper bar 14. The three conductive cross arms are respectively marked with 1# conductive cross arm 15, 2# conductive cross arm 16 and 3# conductive cross arm 17.

[0044] In this embodiment, the AC bus is a conductive line connecting the transformer 7 and the power cabinet 8, marked by A wire 18, B wire 19 and C wire 20; the converter bus is the outlet of the power cabinet 8, marked by U wire 21, V wire 22 and W wire 23; the lifting electrode short network is a conductive line such as copper busbar, copper tube, soft cable connecting the three electrode cross arms, marked by a wire 24, b wire 25 and c wire 26 respectively; the furnace bottom electrode bus 27 is a conductive line connecting the furnace bottom electrode 4 and the power cabinet 8, and the reactor 9 is connected in series in the furnace bottom electrode bus; the conversion soft connection is a section of soft connection compensator. The conversion soft connection is a section of soft connection compensator, which can switch the connection at different conductive ends.

[0045] In this embodiment, the top cover 5 is made of a steel plate, and is provided with a feeding port 28 , an observation port 29 and a dust collecting port 30 .

[0046] In this embodiment, the transformer 7 is connected to the power switch cabinet 31 .

[0047] In this embodiment, when the soft connection is converted to connect the A wire 18, the B wire 19, and the C wire 20 to the lifting electrode short network a wire 24, the b wire 25, and the c wire 26 respectively, the power supply cabinet 8 is not connected to the power supply system, and the electric furnace equipment is a three-phase AC arc furnace. At this time, the power supply system is actually directly connected to the three conductive cross arms from the transformer; the electrical control system does not control the power supply cabinet.

[0048] When the conversion soft connection connects the AC bus U wire 21, V wire 22, and W wire 23 to the lifting electrode short network a wire 24, b wire 25, and c wire 26 respectively, the power supply cabinet 8 is completely connected to the power supply system, and the electric furnace equipment is a three-phase low-frequency arc furnace with controllable polarity. At this time, the power supply system is actually connected to the three conductive cross arms from the transformer 7 through all the power supply cabinets 8. The electrical control system controls all components in the power supply cabinet, and the power supply cabinet is a three-phase controllable polarity power supply cabinet.

[0049] When the conversion soft connection connects the AC busbar V conductor 21 and W conductor 23 to the lifting electrode short net b conductor 25 and the bottom electrode busbar 27 respectively, the power supply cabinet 8 is partially connected to the power supply system, and the electric furnace equipment is a unipolar DC arc furnace. At the same time, it is necessary to remove the 1# conductive cross arm 15 and the 3# conductive cross arm 17 and lengthen the 2# conductive cross arm 16 so that the 2# conductive cross arm 16 can be used as a cathode. At this time, the power supply system is actually connected to a conductive cross arm and the furnace bottom electrode 4 from the transformer through part of the power supply cabinet 8; the electrical control system controls some components in the power supply cabinet 8, and only some of the components in the power supply cabinet work, forming a unipolar DC power supply cabinet.

[0050] When the soft connection is converted to connect the AC busbar U conductor 21 and W conductor 23 to the lifting electrode short network a conductor 24 and c conductor 26 respectively, the power supply cabinet 8 is partially connected to the power supply system, and the 2# conductive cross arm 16 is removed and the positions of the 1#15 and 3# conductive cross arms 17 are adjusted. At this time, the electrical control system partially controls the power supply cabinet 8, and realizes different power supply structures according to different control methods. The electric furnace equipment is a two-electrode controllable polarity low-frequency arc furnace or a two-electrode DC arc furnace. At this time, the power supply system is actually connected to the two conductive cross arms from the transformer through part of the power supply cabinet 8; the electrical control system controls some components of the power supply cabinet 8, and only some of the components in the power supply cabinet 8 work, forming a DC power supply cabinet or a two-pole controllable frequency conversion power supply cabinet.

[0051] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An electric furnace device with integrated multiple power supply structures, characterized in that: It includes furnace body device, furnace cover device, electrode lifting system, power supply system and short network system; The furnace body device comprises a furnace body (1), a furnace tilting motor (2), a furnace body support base (3) and a furnace bottom electrode (4); the furnace body (1) and the furnace tilting motor (2) are mounted on the furnace body support base (3); the furnace body (1) is provided with an upper and lower furnace outlet, the upper portion being a dumping furnace outlet and the lower portion being a discharge furnace outlet; the furnace tilting motor (2) is arranged at the side of the furnace body (1) and the furnace tilting motor (2) drives the furnace body (1) to dump materials in the furnace body (1) through the dumping furnace outlet; the furnace bottom electrode (4) is arranged at the bottom of the furnace body (1), and a conductive copper bar is used to clamp the furnace bottom electrode (4) as a conductive structure; The furnace cover device comprises a top cover (5) and a top cover track, wherein the top cover track comprises a first track arranged on the furnace body and a second track installed on an independent track bracket (6), wherein the first track and the second track can be used in conjunction with each other or can be used independently, and the top cover (5) is connected to the top cover track via a roller; The electrode lifting system is a trolley-type horizontal arm column lifting structure; The power supply system comprises a transformer (7), a power supply cabinet (8) and a reactor (9); the power supply cabinet (8) is a three-phase controllable polarity power supply cabinet; The short-circuit system refers to the conductive line from the secondary outlet of the transformer to the tail end of the electrode cross arm, including the AC bus, the current conversion bus, the lifting electrode short-circuit, the furnace bottom electrode bus and the conversion soft connection; The furnace bottom electrode (4) is connected to the power supply cabinet (8) via a reactor (9), and the electrode lifting system is conductively connected to the power supply cabinet (8) via a short-circuit system; The AC busbar is a conductive line connecting the transformer (7) and the power cabinet (8), and is marked by an A wire (18), a B wire (19), and a C wire (20); the current conversion busbar is an outlet of the power cabinet (8), and is marked by a U wire (21), a V wire (22), and a W wire (23); the lifting electrode short network is a conductive line connecting three conductive cross arms, and is marked by an a wire (24), a b wire (25), and a c wire (26) respectively; the furnace bottom electrode busbar (27) is a conductive line connecting the furnace bottom electrode (4) and the power cabinet (8), and the reactor (9) is connected in series to the furnace bottom electrode busbar; the conversion soft connection is a section of a soft connection compensator; The top cover (5) is made of a steel plate and is provided with a feeding port (28), an observation port (29) and a dust collecting port (30).

2. The electric furnace device with integrated multiple power supply structures according to claim 1, characterized in that: The electrode lifting system comprises three conductive cross arms, three upright posts (10) and an upright post bracket (11); the three upright posts (10) are arranged on the upright post bracket (11); the conductive cross arms are vertically connected to the upright posts (10); a reduction motor (12) for driving the conductive cross arms is arranged on the upright posts (10); the reduction motor (12) is transmission-connected to the conductive cross arms via a transmission assembly (13); the tail end of the conductive cross arm is conductively connected to the short-circuit network system; a cross arm conductive copper bar (14) is arranged at the head end of the conductive cross arm; the three conductive cross arms are respectively identified by a 1# conductive cross arm (15), a 2# conductive cross arm (16) and a 3# conductive cross arm (17).

3. The electric furnace device with integrated multiple power supply structures according to claim 1, characterized in that: The transformer (7) is connected to the power switch cabinet (31).

4. The electric furnace device with integrated multiple power supply structures according to claim 1, characterized in that: When the conversion soft connection connects the A wire (18), the B wire (19), and the C wire (20) to the lifting electrode short net a wire (24), the b wire (25), and the c wire (26), respectively, the power cabinet (8) is not connected to the power supply system, and the electric furnace equipment is a three-phase AC arc furnace. At this time, the electrical control system does not control the power cabinet (8); when the conversion soft connection connects the converter busbar U wire (21), the V wire (22), and the W wire (23) to the lifting electrode short net a wire (24), the b wire (25), and the c wire (26), respectively, the power cabinet (8) is fully connected to the power supply system, and the electric furnace equipment is a three-phase controllable polarity low-frequency arc furnace. At this time, the electrical control system fully controls the power cabinet (8); when the conversion soft connection connects the converter busbar V wire (22) and the W wire (23) to the lifting electrode short net b wire (25) and the bottom electrode busbar (27), respectively, the power cabinet (8) is partially connected to the power supply system. In the electric power supply system, the electric furnace equipment is a single-pole DC electric arc furnace. At this time, the electrical control system partially controls the power supply cabinet (8). At the same time, it is necessary to remove the 1# conductive cross arm (15) and the 3# conductive cross arm (17) and lengthen the 2# conductive cross arm (16) so that the 2# conductive cross arm (16) can be used as a cathode. In addition, when the conversion soft connection connects the converter busbar U conductor (21) and the W conductor (23) to the lifting electrode short net a conductor (24) and the c conductor (26) respectively, the power supply cabinet (8) is partially connected to the power supply system, and the 2# conductive cross arm (16) is removed and the positions of the 1# conductive cross arm (15) and the 3# conductive cross arm (17) are adjusted. At this time, the electrical control system partially controls the power supply cabinet (8). At this time, the electrical control system partially controls the power supply cabinet (8). Different power supply structures are realized according to different control methods. The electric furnace equipment is a two-electrode controllable polarity low-frequency electric arc furnace or a two-electrode DC electric arc furnace.

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