A DC electric furnace with variable circuit

Abstract

The present invention is applicable to the technical field of DC electric furnaces, and provides a DC electric furnace with a variable circuit, comprising an electric furnace body; a support rod is fixed to the inner bottom surface of the electric furnace body; a top cover is fixed to the top of the support rod; a conductive part coaxial with the top cover is fixed to the top of the electric furnace body; the top cover comprises a top cover; the conductive part comprises an inner ring plate and an outer ring plate arranged concentrically; a heater is rotatably arranged between the inner ring plate and the top cover; a current collector is slidably arranged between the inner ring plate and the top of the outer ring plate; the heating part comprises an annular rotating plate rotatably arranged between the inner ring plate and the top cover; two groups of electrode columns plug-in and matched with two current collectors are symmetrically arranged on the top of the annular rotating plate; the device realizes the conversion of the positive and negative poles of the two electrode columns through the linkage cooperation between the various components, ensures that the electrode columns can be roasted synchronously during the production process, can effectively avoid or reduce the electrode break accident, ensure the smooth progress of production, and also improve the hot melting efficiency of the electric furnace.

Description

Technical Field

[0001] The invention relates to the technical field of direct current ore-fired electric furnaces, and more specifically to a direct current ore-fired electric furnace with a variable circuit. Background Art

[0002] The ore-generating furnace is also called arc furnace or resistance furnace. It adopts the submerged arc operation with the electrode inserted into the charge. It is mainly used for reducing smelting ore, carbonaceous reducing agent and solvent and other charges. The ore-generating furnace commonly used in industry is AC arc furnace, which has the disadvantages of unbalanced three-phase power, high noise, large eddy current loss in the conductor due to the strong alternating magnetic field near the large current conductor, uneven current in the secondary short-net conductor due to the skin effect, and large ohmic loss.

[0003] Compared with AC electric furnace, DC electric furnace has the advantages of high power factor, small short-circuit reactance, no skin effect, etc., good powder adaptability and stable production furnace conditions. However, in the operation of the prior art electric furnace, the heat generated by the positive electrode anode area is greater than the heat generated by the negative electrode cathode area. The smelting current during the smelting process of the electric furnace is as high as 100kA or even greater. The smelting current is the main source of heat energy for electrode roasting. When the pressing and releasing speeds are equal, the roasting near the electrode holder is similar. However, due to the relatively fast consumption of the anode electrode and the more serious heating of the end anode, the problem of soft and hard break accidents of the electrode column often occurs, which reduces the service life of the electrode column. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a DC electric furnace with a variable circuit, which can realize the conversion of the positive and negative poles of the two electrode columns through the linkage cooperation between the various components, ensuring that the electrode columns connected to the positive and negative electrodes can be roasted synchronously during the production process, which can effectively avoid or reduce electrode breakage accidents, ensure the smooth progress of production, and at the same time improve the hot melting efficiency of the electric furnace.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A variable circuit DC ore-fired electric furnace comprises an electric furnace body; a support rod is fixed to the inner bottom surface of the electric furnace body; a top cover is fixed to the top of the support rod; and a conductive part coaxial with the top cover is fixed to the top of the electric furnace body.

[0007] The top cover portion includes a top cover; the conductive portion includes an inner ring plate and an outer ring plate which are arranged concentrically; a heating portion is rotatably arranged between the inner ring plate and the top cover.

[0008] A positive conductive rail and a negative conductive rail arranged concentrically are fixed between the inner ring plate and the outer ring plate; the positive conductive rail is located above the negative conductive rail; and oblique insulating guide plates are connected between both ends of the positive conductive rail and the negative conductive rail.

[0009] A current collector is slidably arranged between the inner ring plate and the top of the outer ring plate; the heating part includes an annular rotating plate rotatably arranged between the inner ring plate and the top cover; two groups of electrode columns plugged with two current collectors are symmetrically arranged through the top of the annular rotating plate.

[0010] The present invention is further configured as follows: an annular enclosure is fixed on the top of the electric furnace body; a first connecting flange is fixed on the top of the annular enclosure; a second connecting flange is fixed on the peripheral side of the outer ring plate; the first connecting flange and the second connecting flange are fixedly connected by fastening bolts.

[0011] An exhaust pipe is provided through the peripheral side of the annular enclosure; a feed pipe is provided through the peripheral side of the electric furnace body near its top, and a discharge port is provided near its bottom.

[0012] The present invention is further configured as follows: a positive electrode terminal and a negative electrode terminal are sequentially penetrated by the circumferential side surface of the outer ring plate; one end of the positive electrode terminal and the negative electrode terminal are respectively connected to the positive conductive rail and the negative conductive rail; the other ends of the positive electrode terminal and the negative electrode terminal are respectively connected to the positive electrode and the negative electrode of the external power supply.

[0013] The present invention is further configured as follows: annular grooves are provided on the tops of the inner ring plate and the outer ring plate; guide grooves are provided on the inner walls of the annular grooves; a connecting portion is rotatably provided between the two annular grooves; annular guide grooves are provided on the outer peripheral side surfaces of the top cover and the inner peripheral side surfaces of the inner ring plate; annular rails that rotatably cooperate with the corresponding annular guide grooves are fixed to the inner and outer peripheral sides of the annular rotating plate.

[0014] The connecting part comprises an annular baffle plate; the bottom surface of the annular baffle plate is symmetrically provided with guide holes; the bottom surface of the annular baffle plate is symmetrically fixed with arc plates rotatably matched with the annular groove on both sides of the guide holes; the peripheral side surface of the arc plate is fixed with an arc rail rotatably matched with the guide groove.

[0015] The inner circumferential side of the annular baffle is symmetrically fixed with a sliding sleeve; a U-shaped plate is fixed between the two sliding sleeves; a controller and a servo motor are fixedly installed on the top of the top cover in sequence; the output end of the servo motor is connected to a connecting plate through a reducer; the connecting plate is fixedly installed on the top of the U-shaped plate by fastening bolts; the output end of the controller is electrically connected to the servo motor.

[0016] The present invention is further configured as follows: the collector includes an insulating shell; a first conductive column and a second conductive column are symmetrically and connectedly arranged on the bottom surface of the insulating shell; insulating sleeves are arranged on the surrounding side surfaces of the first conductive column and the second conductive column of the insulating shell; the first conductive column and the second conductive column are respectively slidably matched with the guide hole and the sliding sleeve.

[0017] A carbon brush is fixed at the bottom end of the first conductive column; a conductive plate is fixed inside the insulating shell; the first conductive column is connected to the second conductive column through the conductive plate; a reset spring is fixedly connected between the bottom surface of the insulating shell and the annular baffle.

[0018] The present invention is further configured as follows: a slot for plugging and cooperating with a second conductive column is provided on the top of the electrode column; a socket for plugging and cooperating with a corresponding electrode column is symmetrically provided on the top of the annular rotating plate; a fixing ring is fixed on the peripheral side of the electrode column near its top end; ear plates are symmetrically fixed on the peripheral side of the fixing ring; the ear plates are fixedly installed on the top of the annular rotating plate by fastening bolts; and a lifting ear is fixed on the side of the ear plate.

[0019] The present invention is further configured as follows: an extension plate is symmetrically fixed to the bottom surface of the annular rotating plate; a guide ring coaxial with the annular rotating plate is fixed between the two extension plates; and a plurality of curved guide grooves are evenly opened on the bottom surface of the guide ring.

[0020] A plurality of sliding holes are evenly arranged on the top of the top cover; a stirring part adapted to the curved guide groove is slidably arranged in each of the sliding holes; the stirring part comprises a lifting ring; a plurality of sliding rods slidably matched with the corresponding sliding holes are evenly fixed on the top of the lifting ring; a stopper is fixed on the end of the sliding rod; a support spring sleeved on the corresponding sliding rod is fixedly connected between the stopper and the top cover.

[0021] The present invention is further configured as follows: a plurality of extension ears are evenly fixed on the outer peripheral side surface of the lifting ring; a rotating rod is rotatably arranged through the top of the extension ear; a ball head is fixed on the top of the rotating rod; a spiral groove is opened on the peripheral side surface of the rotating rod, and a connecting disk is fixed at the bottom; a plurality of stirring rods are evenly fixed on the peripheral side surface of the connecting disk.

[0022] A connecting rod is fixed to the bottom surface of the top cover; a fixing plate is fixed to the bottom of the connecting rod; a number of limiting holes that slide with the rotating rod are evenly opened on the surface of the fixing plate; a number of L-shaped rods are evenly fixed on the surface of the fixing plate; a guide ball that slides with the spiral groove is fixed to the end of the L-shaped rod; a mounting plate is fixed to the top of the support rod; the mounting plate and the fixing plate are fixedly connected by fastening bolts; an annular channel that slides with the electrode column is formed between the top of the electric furnace body and the fixing plate.

[0023] The advantages of the present invention are:

[0024] 1. The present invention controls the heating part to rotate slowly, thereby driving the two groups of current collectors to slide slowly on the conductive part through the connecting part. In the initial state, the two groups of current collectors are in sliding contact with the positive conductive rail and the negative conductive rail respectively. In this process, uninterrupted power supply is achieved to avoid poor hot melting effect caused by too frequent conversion of positive and negative poles. When the two groups of current collectors slide into the negative conductive rail and the positive conductive rail respectively through the corresponding inclined insulating guide plates, the positive and negative poles of the two electrode columns are converted, ensuring that the electrode columns connected to the positive and negative electrodes can be fired synchronously during the production process, which can effectively avoid or reduce the accident of broken electrode columns, ensure the smooth progress of production, and also improve the hot melting efficiency of the ore-fired furnace.

[0025] 2. The heating part of the present invention drives the guide ring to rotate during the rotation process. Under the elastic force of the supporting spring, each group of ball heads is driven to press against the bottom of the guide ring. The guide ring drives the stirring part to reciprocate and rise and fall during the rotation process. Through the setting of the guide ball and the spiral groove, the slide rod reciprocates during the reciprocating and rising process, thereby driving each group of stirring rods to reciprocate during the rising and falling process, stirring the raw materials, preventing the raw materials from piling up into blocks, and improving the hot melting efficiency of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic structural diagram of a DC electric furnace with a variable circuit.

[0027] Figure 2 It is a structural schematic diagram of the electric furnace body of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the top cover part of the present invention.

[0029] Figure 4 It is a schematic structural diagram of the conductive part of the present invention.

[0030] Figure 5 For the present invention Figure 4 A magnified image of area A.

[0031] Figure 6 It is a schematic structural diagram of the heating part of the present invention.

[0032] Figure 7 For the present invention Figure 6 A magnified view of area B.

[0033] Figure 8 It is a schematic structural diagram of the connecting portion of the present invention.

[0034] Fig. 9 It is a structural schematic diagram of the connecting portion of the present invention from another angle.

[0035] Fig.10 It is a schematic structural diagram of the current collector of the present invention.

[0036] Fig.11 It is a schematic structural diagram of the stirring part of the present invention.

[0037] Fig.12 It is a schematic diagram of the state of the electrode column of the present invention under the positive and negative pole conversion state.

[0038] Fig.13 It is a schematic diagram of the state of the stirring part of the present invention when it is in working state.

[0039] (a) is a schematic diagram showing the descending process of the stirring part, and (b) is a schematic diagram showing the ascending process of the stirring part.

[0040] Fig.14 For the present invention Fig.13 (b) Enlarged view of region C.

[0041] In the figure: 1. furnace body; 2. support rod; 3. top cover; 4. conductive part; 5. top cover; 6. inner ring plate; 7. outer ring plate; 8. heating part; 9. positive electrode conductive rail; 10. negative electrode conductive rail; 11. oblique insulating guide plate; 12. collector; 13. annular rotating plate; 14. electrode column; 15. annular enclosure; 16. first connecting flange; 17. second connecting flange; 18. exhaust pipe; 19. feed pipe; 20. discharge port; 21. positive electrode terminal; 22. negative electrode terminal; 23. annular groove; 24. guide groove; 25. connecting part; 26. annular baffle; 27. guide hole; 28. arc plate; 29. ​​arc rail; 30. sleeve; 31. U-shaped plate; 32. controller; 33. servo motor; 34. Connecting plate; 35, insulating shell; 36, first conductive column; 37, second conductive column; 38, carbon brush; 39, conductive plate; 40, reset spring; 41, slot; 42, fixing ring; 43, ear plate; 44, lifting ear; 45, extension plate; 46, guide ring; 47, curved guide groove; 48, sliding hole; 49, stirring part; 50, lifting ring; 51, slide rod; 52, block; 53, extension ear; 54, rotating rod; 55, ball head; 56, spiral groove; 57, connecting plate; 58, stirring rod; 59, connecting rod; 60, fixing plate; 61, limiting hole; 62, L-shaped rod; 63, guide ball; 64, mounting plate; 65, annular channel; 66, supporting spring; 67, insulating sleeve; 68, annular guide groove; 69, annular rail. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0044] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0045] For example, see Figure 1-14 , the present invention provides the following technical solutions:

[0046] A DC electric furnace with a variable circuit, specifically, comprises an electric furnace body 1; a support rod 2 is fixed to the inner bottom surface of the electric furnace body 1; a top cover 3 is fixed to the top of the support rod 2; a conductive part 4 coaxial with the top cover 3 is fixed to the top of the electric furnace body 1; the top cover 3 comprises a top cover 5; the conductive part 4 comprises an inner ring plate 6 and an outer ring plate 7 arranged concentrically; a heating part 8 is rotatably arranged between the inner ring plate 6 and the top cover 5; a positive conductive rail 9 and a negative conductive rail 10 arranged concentrically are fixed between the inner ring plate 6 and the outer ring plate 7; the positive conductive rail 9 is located above the negative conductive rail 10; oblique insulating guide plates 11 are connected between both ends of the positive conductive rail 9 and the negative conductive rail 10; a current collector 12 is slidably arranged between the top of the inner ring plate 6 and the outer ring plate 7; the heating part 8 comprises an annular rotating plate 13 rotatably arranged between the inner ring plate 6 and the top cover 5; two groups of electrode columns 14 plug-matched with two current collectors 12 are symmetrically penetrated on the top of the annular rotating plate 13.

[0047] Working principle of the first embodiment:

[0048] By controlling the heating part 8 to rotate slowly, the two sets of current collectors 12 are driven to slide slowly on the conductive part 4. In the initial state, the two sets of current collectors 12 are respectively in sliding contact with the positive conductive rail 9 and the negative conductive rail 10. In this process, uninterrupted power supply is achieved to avoid the poor hot melting effect caused by excessively frequent positive and negative conversion of the electrode column 14. When the two sets of current collectors 12 slide into the negative conductive rail 10 and the positive conductive rail 9 through the corresponding oblique insulating guide plates 11, the positive and negative conversion of the two electrode columns 14 is achieved, ensuring that the external positive and negative electrodes are connected during the production process. The electrode columns 14 can be roasted synchronously, which can effectively avoid or reduce the accident of broken electrode columns 14, ensure the smooth progress of production, and also improve the hot melting efficiency of the ore-melting furnace; the positive conductive rail 9 is located above the negative conductive rail 10, so that the positive conductive rail 9 and the negative conductive rail 10 are staggered and separated, avoiding the positive conductive rail 9 and the negative conductive rail 10 being too close to each other and causing a short circuit, and an oblique insulating guide plate 11 is connected between both ends of the positive conductive rail 9 and the negative conductive rail 10, so that the collector 12 can smoothly realize the conversion between the positive conductive rail 9 and the negative conductive rail 10.

[0049] For example 2, please refer to Figure 1-14 The second embodiment makes the following improvements on the basis of the first embodiment. Specifically, an annular enclosure 15 is fixed on the top of the electric furnace body 1; a first connecting flange 16 is fixed on the top of the annular enclosure 15; a second connecting flange 17 is fixed on the peripheral side of the outer ring plate 7; the first connecting flange 16 and the second connecting flange 17 are fixedly connected by fastening bolts; an exhaust pipe 18 is provided through the peripheral side of the annular enclosure 15; a feed pipe 19 is provided through the peripheral side of the electric furnace body 1 near its top, and a discharge port 20 is provided on the peripheral side near its bottom.

[0050] The positive electrode terminal 21 and the negative electrode terminal 22 are sequentially penetrated through the side surface of the outer ring plate 7; one end of the positive electrode terminal 21 and the negative electrode terminal 22 are respectively connected to the positive conductive rail 9 and the negative conductive rail 10; the other ends of the positive electrode terminal 21 and the negative electrode terminal 22 are respectively connected to the positive pole and the negative pole of the external power supply.

[0051] The inner ring plate 6 and the outer ring plate 7 are both provided with an annular groove 23 on the top; a guide groove 24 is provided on the inner wall of the annular groove 23; a connecting portion 25 is rotatably provided between the two annular grooves 23; an annular guide groove 68 is provided on the outer peripheral side of the top cover 5 and the inner peripheral side of the inner ring plate 6; an annular rail 69 is fixed on the inner and outer peripheral sides of the annular rotating plate 13 to rotate with the corresponding annular guide groove 68; the connecting portion 25 includes an annular baffle 26; the bottom surface of the annular baffle 26 is symmetrically provided with guide holes 27; the bottom surface of the annular baffle 26 is symmetrically fixed with guide holes 27 on both sides of the guide holes 27 An arc plate 28 rotatably matched with the annular groove 23; an arc rail 29 rotatably matched with the guide groove 24 is fixed on the side surface of the arc plate 28; a sliding sleeve 30 is symmetrically fixed to the inner side surface of the annular baffle 26; a U-shaped plate 31 is fixed between the two sliding sleeves 30; a controller 32 and a servo motor 33 are fixedly installed on the top of the top cover 5 in sequence; the output end of the servo motor 33 is connected to a connecting plate 34 through a reducer; the connecting plate 34 is fixedly installed on the top inside the U-shaped plate 31 by fastening bolts; the output end of the controller 32 is electrically connected to the servo motor 33.

[0052] The collector 12 includes an insulating shell 35; the first conductive column 36 and the second conductive column 37 are symmetrically connected and arranged on the bottom surface of the insulating shell 35; the first conductive column 36 and the second conductive column 37 of the insulating shell are both provided with insulating sleeves 67 on the surrounding side surfaces; the first conductive column 36 and the second conductive column 37 are respectively slidably matched with the guide hole 27 and the sliding sleeve 30; a carbon brush 38 is fixed to the bottom end of the first conductive column 36; a conductive plate 39 is fixed inside the insulating shell 35; the first conductive column 36 and the second conductive column 37 are connected through the conductive plate 39; a reset spring 40 is fixedly connected between the bottom surface of the insulating shell 35 and the annular baffle 26.

[0053] A slot 41 for plugging with the second conductive column 37 is provided at the top of the electrode column 14; a socket for plugging with the corresponding electrode column 14 is symmetrically provided at the top of the annular rotating plate 13; a fixing ring 42 is fixed to the side surface of the electrode column 14 near its top; ear plates 43 are symmetrically fixed to the side surface of the fixing ring 42; the ear plates 43 are fixedly installed on the top of the annular rotating plate 13 by fastening bolts; and a lifting ear 44 is fixed to the side surface of the ear plate 43.

[0054] Working principle of the second embodiment:

[0055] The mounting plate 64 and the fixing plate 60 are fixedly mounted together by tightening bolts to realize the fixed installation of the top cover part 3 and the electric furnace body 1; the first connecting flange 16 and the second connecting flange 17 are fixedly connected by tightening bolts to complete the fixed installation of the electric furnace body 1 and the conductive part 4; the two groups of electrode columns 14 are symmetrically passed through the top of the annular rotating plate 13 respectively, and the two groups of fixing rings 42 are symmetrically fixed on the annular rotating plate 13 by tightening bolts to realize the fixed installation of the electrode columns 14 and the annular rotating plate 13.

[0056] By controlling the start-up of the servo motor 33, its output end drives the connecting part 25 to rotate slowly through the reducer, thereby driving the two groups of collectors 12 to rotate slowly together with the heating part 8. During the rotation of the heating part 8, the two groups of electrode columns 14 stir the material, thereby improving the hot melting efficiency; in the initial state, the carbon brushes 38 on one group of collectors 12 are pressed against the surface of the positive conductive rail 9 under the elastic pressure of the reset spring 40, and the electrode column 14 corresponding to the collector 12 is connected to the positive electrode of the external power supply, and the carbon brushes 38 on the other group of collectors 12 are pressed against the surface of the negative conductive rail 10 under the elastic pressure of the reset spring 40, and the electrode column 14 corresponding to the collector 12 is connected to the negative electrode of the external power supply.

[0057] When the heating part 8 rotates slowly together with the two sets of current collectors 12 until the carbon brushes 38 on the two sets of current collectors 12 move onto the inclined insulating guide plate 11, the two sets of carbon brushes 38 are not energized, and at this time, the two sets of electrode columns 14 are de-energized.

[0058] The heating part 8 is controlled to connect the two groups of current collectors 12 and continue to rotate slowly, so that the carbon brush 38 that is in sliding contact with the surface of the positive electrode conductive rail 9 in the initial state slides to the surface of the negative electrode conductive rail 10, and the other group of carbon brushes 38 that is in sliding contact with the negative electrode conductive rail 10 in the initial state slides to the positive electrode conductive rail 9, thereby realizing the conversion of the positive and negative poles of the two groups of electrode columns 14, ensuring that the electrode columns 14 connected to the external positive and negative electrodes can be fired synchronously during the production process, which can effectively avoid or reduce the accident of broken electrode columns 14, ensure the smooth progress of production, and also improve the hot melting efficiency of the electric arc furnace.

[0059] For example 3, please refer to Figure 1-14 , the third embodiment makes the following improvements on the basis of the second embodiment. Specifically, an extension plate 45 is symmetrically fixed to the bottom surface of the annular rotating plate 13; a guide ring 46 coaxial with the annular rotating plate 13 is fixed between the two extension plates 45; a plurality of curved guide grooves 47 are evenly opened on the bottom surface of the guide ring 46; a plurality of sliding holes 48 are evenly opened on the top of the top cover 5; a stirring portion 49 adapted to the curved guide groove 47 is slidably arranged in each sliding hole 48; the stirring portion 49 includes a lifting ring 50; a plurality of sliding rods 51 slidably matched with the corresponding sliding holes 48 are evenly fixed to the top of the lifting ring 50; a stopper 52 is fixed to the end of the sliding rod 51; a support spring 66 sleeved on the corresponding sliding rod 51 is fixedly connected between the stopper 52 and the top cover 5.

[0060] A number of extension ears 53 are evenly fixed on the outer peripheral side of the lifting ring 50; a rotating rod 54 is rotatably arranged on the top of the extension ear 53; a ball head 55 is fixed on the top of the rotating rod 54; a spiral groove 56 is provided on the peripheral side of the rotating rod 54, and a connecting plate 57 is fixed at its bottom; a number of stirring rods 58 are evenly fixed on the peripheral side of the connecting plate 57; a connecting rod 59 is fixed to the bottom of the top cover 5; a fixed plate 60 is fixed to the bottom of the connecting rod 59; a number of limiting holes 61 that slide with the rotating rod 54 are evenly provided on the surface of the fixed plate 60; a number of L-shaped rods 62 are evenly fixed on the surface of the fixed plate 60; a guide ball 63 that slides with the spiral groove 56 is fixed at the end of the L-shaped rod 62; a mounting plate 64 is fixed on the top of the support rod 2; the mounting plate 64 and the fixed plate 60 are fixedly connected by fastening bolts; an annular channel 65 that slides with the electrode column 14 is formed between the top of the electric furnace body 1 and the fixed plate 60.

[0061] Working principle of the third embodiment:

[0062] The heating part 8 drives the guide ring 46 to rotate during the rotation process. In the initial state, when the support spring 66 is compressed, each group of ball heads 55 is pressed against the bottom of the guide ring 46. During the rotation process of the guide ring 46, the bottom of the guide ring 46 is separated from the corresponding ball heads 55, and under the elastic reset force of the support spring 66, the ball heads 55 slide from the bottom of the guide ring 46 into the curved guide groove 47, driving the stirring part 49 to rise. In short, during the rotation process of the guide ring 46, the stirring part 49 is driven to reciprocate and rise and fall. Through the arrangement of the guide ball 63 and the spiral groove 56, the rotating rod 54 is reciprocated during the reciprocating and rising process, thereby driving each group of stirring rods 58 to reciprocate during the rising and falling process, stirring the raw materials, preventing the raw materials from piling up into blocks, and improving the hot melting efficiency of the raw materials; the electrode column 14 slides in the annular channel 65, which plays a guiding and supporting role for the electrode column 14, preventing the electrode column 14 from being broken during the rotation and stirring process due to extending too deeply into the electric furnace body 1.

[0063] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0067] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A DC electric furnace with a variable circuit, comprising an electric furnace body (1); characterized in that: A support rod (2) is fixed to the inner bottom surface of the electric furnace body (1); a top cover (3) is fixed to the top of the support rod (2); and a conductive part (4) coaxial with the top cover (3) is fixed to the top of the electric furnace body (1); The top cover portion (3) comprises a top cover (5); the conductive portion (4) comprises an inner ring plate (6) and an outer ring plate (7) which are arranged concentrically; a heating portion (8) is rotatably arranged between the inner ring plate (6) and the top cover (5); A positive conductive rail (9) and a negative conductive rail (10) are fixedly arranged concentrically between the inner ring plate (6) and the outer ring plate (7); the positive conductive rail (9) is located above the negative conductive rail (10); and oblique insulating guide plates (11) are connected between both ends of the positive conductive rail (9) and the negative conductive rail (10); A current collector (12) is slidably disposed between the inner ring plate (6) and the top of the outer ring plate (7); the heating portion (8) comprises an annular rotating plate (13) rotatably disposed between the inner ring plate (6) and the top cover (5); two groups of electrode columns (14) are symmetrically disposed through the top of the annular rotating plate (13) and are plugged into and matched with the two current collectors (12); A positive electrode terminal (21) and a negative electrode terminal (22) are sequentially provided on the circumferential side surface of the outer ring plate (7); one end of the positive electrode terminal (21) and the negative electrode terminal (22) are respectively connected to the positive electrode conductive rail (9) and the negative electrode conductive rail (10); the other ends of the positive electrode terminal (21) and the negative electrode terminal (22) are respectively connected to the positive electrode and the negative electrode of the external power supply; The inner ring plate (6) and the outer ring plate (7) are both provided with an annular groove (23) at the top; a guide groove (24) is provided on the inner wall of the annular groove (23); a connecting portion (25) is rotatably provided between the two annular grooves (23); an annular guide groove (68) is provided on the outer peripheral side of the top cover (5) and the inner peripheral side of the inner ring plate (6); an annular rail (69) rotatably matched with the corresponding annular guide groove (68) is fixed to the inner and outer peripheral sides of the annular rotating plate (13); The connecting portion (25) comprises an annular baffle (26); a guide hole (27) is symmetrically formed on the bottom surface of the annular baffle (26); arc-shaped plates (28) rotatably matched with the annular groove (23) are symmetrically fixed on the bottom surface of the annular baffle (26) on both sides of the guide hole (27); an arc-shaped rail (29) rotatably matched with the guide groove (24) is fixed on the peripheral side surface of the arc-shaped plate (28); A sliding sleeve (30) is symmetrically fixed to the inner side surface of the annular baffle (26); a U-shaped plate (31) is fixed between the two sliding sleeves (30); a controller (32) and a servo motor (33) are fixedly mounted on the top of the top cover (5) in sequence; an output end of the servo motor (33) is connected to a connecting plate (34) via a reducer; the connecting plate (34) is fixedly mounted on the top of the U-shaped plate (31) via fastening bolts; the output end of the controller (32) is electrically connected to the servo motor (33); An extension plate (45) is symmetrically fixed to the bottom surface of the annular rotating plate (13); a guide ring (46) coaxial with the annular rotating plate (13) is fixed between the two extension plates (45); a plurality of curved guide grooves (47) are evenly formed on the bottom surface of the guide ring (46); A plurality of sliding holes (48) are evenly formed on the top of the top cover (5); a stirring portion (49) adapted to the curved guide groove (47) is slidably disposed in each sliding hole (48); the stirring portion (49) comprises a lifting ring (50); a plurality of sliding rods (51) slidably matched to the corresponding sliding holes (48) are evenly fixed on the top of the lifting ring (50); a stopper (52) is fixed to the end of the sliding rod (51); a support spring (66) sleeved on the corresponding sliding rod (51) is fixedly connected between the stopper (52) and the top cover (5); A plurality of extension ears (53) are evenly fixed on the outer peripheral side of the lifting ring (50); a rotating rod (54) is rotatably provided through the top of the extension ear (53); a ball head (55) is fixed on the top of the rotating rod (54); a spiral groove (56) is provided on the peripheral side of the rotating rod (54), and a connecting plate (57) is fixed on the bottom; a plurality of stirring rods (58) are evenly fixed on the peripheral side of the connecting plate (57); A connecting rod (59) is fixed to the bottom surface of the top cover (5); a fixing plate (60) is fixed to the bottom of the connecting rod (59); a plurality of limiting holes (61) that are slidably matched with the rotating rod (54) are evenly formed on the surface of the fixing plate (60); a plurality of L-shaped rods (62) are evenly fixed to the surface of the fixing plate (60); a guide ball (63) that is slidably matched with the spiral groove (56) is fixed to the end of the L-shaped rod (62); a mounting plate (64) is fixed to the top of the support rod (2); the mounting plate (64) and the fixing plate (60) are fixedly connected by fastening bolts; and an annular channel (65) that is slidably matched with the electrode column (14) is formed between the top of the electric furnace body (1) and the fixing plate (60).

2. The variable circuit DC ore-fired electric furnace according to claim 1, characterized in that: An annular enclosure (15) is fixed on the top of the electric furnace body (1); a first connecting flange (16) is fixed on the top of the annular enclosure (15); a second connecting flange (17) is fixed on the circumferential side of the outer ring plate (7); the first connecting flange (16) and the second connecting flange (17) are fixedly connected by fastening bolts; An exhaust pipe (18) is provided through the circumferential side of the annular enclosure (15); a feed pipe (19) is provided through the circumferential side of the electric furnace body (1) near its top, and a discharge port (20) is provided on the circumferential side near its bottom.

3. The variable circuit DC electric furnace according to claim 2, characterized in that: The current collector (12) comprises an insulating shell (35); a first conductive column (36) and a second conductive column (37) are symmetrically connected and arranged on the bottom surface of the insulating shell (35); insulating sleeves (67) are arranged on the peripheral side surfaces of the first conductive column (36) and the second conductive column (37) of the insulating shell; the first conductive column (36) and the second conductive column (37) are slidably matched with the guide hole (27) and the sliding sleeve (30) respectively; A carbon brush (38) is fixed to the bottom end of the first conductive column (36); a conductive plate (39) is fixed inside the insulating shell (35); the first conductive column (36) and the second conductive column (37) are connected via the conductive plate (39); and a return spring (40) is fixedly connected between the bottom surface of the insulating shell (35) and the annular baffle (26).

4. The variable circuit DC ore-fired electric furnace according to claim 2, characterized in that: The top of the electrode column (14) is provided with a slot (41) for plugging and matching with the second conductive column (37); the top of the annular rotating plate (13) is symmetrically provided with a socket for plugging and matching with the corresponding electrode column (14); a fixing ring (42) is fixed to the side surface of the electrode column (14) near its top; ear plates (43) are symmetrically fixed to the side surface of the fixing ring (42); the ear plates (43) are fixedly mounted on the top of the annular rotating plate (13) by means of fastening bolts; and a lifting ear (44) is fixed to the side surface of the ear plate (43).

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