An electric arc furnace for producing fused alpha alumina bricks

Abstract

The invention discloses an electric arc furnace for producing fused alpha alumina bricks, belonging to the technical field of electric arc furnaces, comprising an electric arc furnace, wherein an upper end cover is movably connected to the electric arc furnace, a movable through hole is provided on the upper end cover, an electrode rod is inserted into the movable through hole, a side of the inner movable positioning plate away from the side extrusion plate abuts against the outer wall of the electrode rod, when gas continuously enters into the interior of an upper wear-resistant pushing airbag, the upper wear-resistant pushing airbag will expand and drive the side extrusion plate to continuously move downward, and in the process of the side extrusion plate continuously moving downward, the inner movable positioning plate will be continuously squeezed, so that the inner movable positioning plate is squeezed to fit the electrode rod, and the electrode rod is limited and fixed in the process of gradually fitting the electrode rod, and gas is used as a power source as a whole, which greatly reduces the weight above the electric arc furnace, and will not be unable to clamp or loosen due to high temperature.

Description

Technical Field

[0001] The invention relates to the technical field of electric arc furnaces, and in particular to an electric arc furnace for producing fused alpha alumina bricks. Background Art

[0002] As a high-performance refractory material, fused α-alumina bricks are widely used in many fields such as metallurgy, building materials, and chemicals. In its production process, the electric arc furnace, as a key heating equipment, plays an irreplaceable role. In the production process of fused α-alumina bricks, the electric arc furnace uses the high-temperature arc generated between the electrodes to convert electrical energy into thermal energy to efficiently heat and melt the alumina raw materials. In this process, the electric arc furnace not only needs to have sufficient heating capacity to ensure that the alumina raw materials can quickly reach a molten state.

[0003] In the patent entitled "An Electrode Clamping Device for Vacuum Consumable Arc Furnace" and with publication number CN11896037B, it is proposed that as the electrode is consumed, the length of the electrode gradually decreases. When the electrode length is reduced to a certain amount, the distance between the electrode and the metal in the furnace will increase to the point where the electrode cannot generate an arc. At this time, the electrode needs to be replaced, and the remaining electrode will be recycled and then remade into a new electrode. This method will result in incomplete electrode melting and waste resources during remaking. By setting an adjustment mechanism, after the electrode rod is inserted into the clamping tube, the adjustment mechanism can clamp the electrode rod on the clamping tube, and then the lifting mechanism can feed the electrode rod; when the remaining electrode rods are spliced, the adjustment mechanism can also drive the electrode rod to descend, so that the electrode rod is reinserted into the furnace body, thereby completing the electrode rod. Handover, it can splice the old electrode rod with the new electrode rod by setting an adjustment structure and a connecting structure, but it uses multiple motors on the arc furnace to drive the whole to complete the splicing of the electrode rods. The original electrode rod is already very heavy, and when it is necessary to drive the heavier electrode rod to move up and down, a motor with a larger torque is also required, which increases the weight burden on the arc furnace as a whole. In the fixing process, the motor is also used to push the limit structure for fixing. The heat on the arc furnace and the electrode is extremely high, reaching 2000-3000℃. Under extremely high temperature conditions, the motor used to push the limit is extremely prone to shutdown and overload. In particular, during the production process of α-alumina bricks, it is necessary to keep the arc furnace in a high temperature state for a long time. Therefore, the present application proposes an arc furnace for the production of electric-melted α-alumina bricks. Summary of the invention

[0004] The object of the present invention is to provide an electric arc furnace for producing fused α-alumina bricks to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric arc furnace for producing electric fused α-alumina bricks, comprising an electric arc furnace, an upper end cover movably connected to the electric arc furnace, a movable through hole is provided on the upper end cover, an electrode rod is inserted into the movable through hole, an outer sleeve of the electrode rod is provided with a heat-insulating shell, an inner side wall of the heat-insulating shell is provided with a side annular movable groove, a plurality of inner movable positioning plates are slidably connected to the inner side of the side annular movable groove, a plurality of side extrusion plates are slidably connected to the inner side of the heat-insulating shell, a side of the inner movable positioning plate away from the side extrusion plate abuts against the outer wall of the electrode rod, and the side extrusion plate and the inner movable positioning plate are adjacent to each other. One side of the heat insulating shell is an inclined surface and abuts against each other, a plurality of upper wear-resistant pushing airbags are fixedly connected to the inner top wall of the heat insulating shell, and the plurality of upper wear-resistant pushing airbags are interconnected by hoses, and a side of the upper wear-resistant pushing airbag away from the inner top wall of the heat insulating shell is fixedly connected to the upper surface of the side extrusion plate, and the outside of the upper wear-resistant pushing airbag is connected to an air pipe, and one end of the air pipe away from the upper wear-resistant pushing airbag passes through the outer wall of the heat insulating shell and is connected to an air pump, a lower movable groove is provided on the inner bottom wall of the heat insulating shell, and the bottom of the side extrusion plate is inserted into the interior of the lower movable groove, and a lifting structure and a positioning structure are respectively installed on the outside of the electric arc furnace.

[0006] Preferably, a plurality of side push bags are integrally formed on one side of the inner side wall of the heat insulating shell, and the plurality of side push bags are respectively fixedly connected to a plurality of side extrusion plates on one side away from the inner movable positioning plate, the side push bags are connected to the upper wear-resistant pushing air bag, a one-way valve sheet is connected at the connecting position between the side push bags and the upper wear-resistant pushing air bag, the outside of the side push bags is connected to an electric-controlled valve, and one end of the electric-controlled valve away from the side push bags passes through the outer wall of the heat insulating shell.

[0007] Preferably, a plurality of inclined storage grooves are provided on a side of the side extrusion plate close to the inner movable positioning plate, an outwardly protruding snap-in block is hingedly connected inside the inclined storage groove, a pushing bag body is integrally formed on a side of the outwardly protruding snap-in block close to the inclined storage groove, a side of the pushing bag body away from the outwardly protruding snap-in block is fixedly connected to an inner side wall of the pushing bag body, an air guide bag is integrally formed on the bottom of the side pushing bag, a side of the air guide bag away from the side pushing bag passes through the inner wall of the side extrusion plate and is communicated with the pushing bag body.

[0008] Preferably, one side of the inner wall of the pushing capsule is fixedly connected with an electromagnet, and the side of the inner wall of the pushing capsule away from the electromagnet is fixedly connected with an iron adsorption sheet.

[0009] Preferably, the lifting structure includes two threaded holes, which are respectively opened at both ends of the electrode rod, and a threaded column is threadedly connected to the inside of one of the threaded holes located at the top of the electrode rod, and a lifting rope is movably connected to the threaded column. An external lifting frame is arranged on the outside of the electric arc furnace, and a pulley is rotatably connected to the external lifting frame. The lifting rope is arranged on the outside of the pulley, and a winding motor is arranged on the outside of the electric arc furnace, and a winding roller is fixedly connected to the output shaft of the winding motor, and the lifting rope is wrapped around the outside of the winding roller.

[0010] Preferably, the positioning structure includes two square support frames, the interior of the square support frame is rotatably connected to a screw rod, the top of the square support frame is fixedly connected to a drive motor, the output shaft of the drive motor passes through the outer wall of the square support frame and is fixedly connected to the screw rod, the external thread of the screw rod is connected to a movable seat, and the outside of the movable seat is fixedly connected to the outer wall of the heat insulating shell.

[0011] Preferably, both sides of the side extrusion plate are fixedly connected with side clamping plates, and the two side clamping plates are respectively attached to both sides of the inner movable positioning plate.

[0012] Preferably, a plurality of renovation covers are hingedly connected to the exterior of the heat-insulating shell.

[0013] Preferably, an arc-shaped clamping plate is integrally formed on one side of the side extrusion plate close to the inner movable positioning plate, and an arc-shaped clamping groove is provided on one side of the inner movable positioning plate close to the side extrusion plate.

[0014] Preferably, the outer parts of the upper wear-resistant propulsion airbag, the side propulsion airbag and the propulsion airbag body are all coated with a layer of heat-insulating aerogel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when the electrode rod is used for a long time so that its length becomes shorter and needs to be replaced or reorganized, the electrode rod can be lifted up, and after lifting up, gas is continuously injected into the upper wear-resistant pushing airbag through an air pump. When the gas continues to enter the upper wear-resistant pushing airbag, the upper wear-resistant pushing airbag will expand, driving the side extrusion plate to move continuously downward. In the process of the side extrusion plate moving downward continuously, the inner movable positioning plate will be continuously squeezed, so that the inner movable positioning plate is squeezed to fit the electrode rod, and the electrode rod is limited and fixed in the process of gradually fitting the electrode rod. Gas is used as the power source as a whole, which greatly reduces the weight above the arc furnace, and will not be unable to clamp or loosen due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 is a schematic cross-sectional structural diagram of a heat-insulating housing in an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of multiple upper wear-resistant propulsion airbags in an embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the side push bag and the upper wear-resistant push air bag in an embodiment of the present invention; Figure 5 It is a schematic structural diagram of the side extrusion plate and the inner movable positioning plate in the separated state in the embodiment of the present invention; Figure 6 For the embodiment of the present invention Figure 2 A schematic diagram of the enlarged structure of area A; Figure 7 It is a schematic diagram of the cross-sectional structure of the pushing capsule in the embodiment of the present invention; Figure 8 It is a structural schematic diagram of a threaded hole in an embodiment of the present invention; Fig. 9 For the embodiment of the present invention Figure 4 Schematic diagram of the enlarged structure of area B in .

[0017] In the figure: 100, electric arc furnace; 101, upper end cover; 102, electrode rod; 103, heat-insulating shell; 104, side extrusion plate; 105, inner movable positioning plate; 106, side annular movable groove; 107, upper wear-resistant push airbag; 108, gas pipe; 109, air pump; 110, lower movable groove; 200, side push bag; 201, one-way valve plate; 202, electric control valve; 300, air guide bag; 301, inclined storage tank; 302 , push capsule; 303, external snap-in block; 400, electromagnet; 401, iron adsorption sheet; 500, side snap-in plate; 501, arc snap-in plate; 502, arc snap-in groove; 600, square support frame; 601, screw rod; 602, drive motor; 700, external hanging frame; 701, pulley; 702, winding motor; 703, winding roller; 704, lifting rope; 800, threaded column; 801, threaded hole; 900, renovation cover. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: Figure 1As shown, the present application discloses an electric arc furnace for producing fused α-alumina bricks, comprising an electric arc furnace 100, wherein an upper end cover 101 is movably connected to the electric arc furnace 100, a movable through hole is provided on the upper end cover 101, an electrode rod 102 is inserted into the movable through hole, an outer sleeve of the electrode rod 102 is provided with a heat-insulating shell 103, an inner side wall of the heat-insulating shell 103 is provided with a side annular movable groove 106, a plurality of inner movable positioning plates 105 are slidably connected to the inner side of the side annular movable groove 106, a plurality of side extrusion plates 104 are slidably connected to the inner side of the heat-insulating shell 103, a side of the inner movable positioning plate 105 away from the side extrusion plate 104 abuts against the outer wall of the electrode rod 102, and a side of the side extrusion plate 104 adjacent to the inner movable positioning plate 105 The upper wear-resistant pushing airbags 107 are connected to each other through hoses. The side of the upper wear-resistant pushing airbag 107 away from the upper top wall of the heat-insulating shell 103 is fixedly connected to the upper surface of the side extrusion plate 104. The outside of the upper wear-resistant pushing airbag 107 is connected to an air pipe 108. The end of the air pipe 108 away from the upper wear-resistant pushing airbag 107 passes through the outer wall of the heat-insulating shell 103 and is connected to an air pump 109. The inner bottom wall of the heat-insulating shell 103 is provided with a lower movable groove 110. The bottom of the side extrusion plate 104 is inserted into the lower movable groove 110. The outside of the electric arc furnace 100 is respectively installed with a lifting structure and a positioning structure.

[0020] Specifically, during use, raw materials for α-alumina bricks are placed inside the electric arc furnace 100, and the specific raw material ratio is: Al2O3>98%, SiO2<0.5%, Na2O<0.2%, Li2O 0.2% to 0.4%, B2O3 0.2%-0.4%, CaO0.1%-0.3%. After placing the above raw materials inside the electric arc furnace 100, the electrode rod 102 is inserted into the electric arc furnace 100 and energized to generate arc heating. After arc heating, the raw materials of the α-alumina bricks are melted.

[0021] Furthermore, the physical properties of the fused α-alumina bricks after melting and casting are required to be: volume density > 3.65g / cm3, glass phase seepage (1500℃×4h) <0.5%, room temperature compressive strength > 300Mpa, load softening temperature 0.2MPa×0.6% > 1700℃, thermal shock resistance test 950℃ > 15 times, and the α-alumina crystal phase content in the sample is > 98% according to XRD analysis.

[0022] like Figure 1As shown, the lifting structure includes two threaded holes 801, and the two threaded holes 801 are respectively opened at both ends of the electrode rod 102. A threaded column 800 is threadedly connected inside the threaded hole 801 located at the top of the electrode rod 102, and a lifting rope 704 is movably connected to the threaded column 800. An external lifting frame 700 is mounted on the outside of the arc furnace 100, and a pulley 701 is rotatably connected to the external lifting frame 700. The lifting rope 704 is mounted on the outside of the pulley 701. A winding motor 702 is mounted on the outside of the arc furnace 100, and the output shaft of the winding motor 702 is fixedly connected to the winding roller 703, and the lifting rope 704 is wound around the outside of the winding roller 703.

[0023] Furthermore, in the process of placing the electrode rod 102 into the interior of the electric arc furnace 100, the electrode rod 102 can be hoisted into the interior of the electric arc furnace 100 through the hoisting structure, and in the process of use, the staff will thread the threaded column 800 to the threaded hole 801 at the upper end of the electrode rod 102. After the threaded column 800 and the threaded hole 801 are connected, the staff can connect the threaded column 800 to the hoisting rope 704. The hoisting structure opened on the outside of the threaded column 800 is a commonly used prior art figure not shown. When the hoisting rope 704 is connected to the threaded column 800, After the connection, the staff can start the winding motor 702 to drive the winding roller 703 to rotate, thereby winding the lifting rope 704. When the lifting rope 704 is wound, the electrode rod 102 can be lifted, thereby pulling the electrode rod 102 out of the interior of the electric arc furnace 100. After the lifting rope 704 is released in the reverse direction, the electrode rod 102 can be inserted into the interior of the electric arc furnace 100 again. During the lifting and placement of the insulating shell 103, the electrode rod 102 is guided in the vertical direction by the insulating shell 103 to avoid misalignment of the insulating shell 103 during the up and down lifting process.

[0024] Furthermore, during the continuous use of the electrode rod 102, the electrode rod 102 will be self-consumed. After the electrode rod 102 is self-consumed to a certain length, the staff can lift the electrode rod 102, and after lifting the electrode rod 102, fix and limit the electrode rod 102. During the fixing and limiting process, the heat insulating shell 103 is moved to a specified position through an external positioning structure. After the heat insulating shell 103 is moved to the specified position, the gas is continuously injected into the gas pipe 108 by starting the air pump 109 to make the gas supply pipe 108 The gas delivery pipe 108 continuously injects gas into the interior of the upper wear-resistant pushing airbag 107. When the gas continues to enter the interior of the gas delivery pipe 108, the continuous entry of the gas will cause the upper wear-resistant pushing airbag 107 to expand. When the upper wear-resistant pushing airbag 107 expands, it will push the side squeezing plate 104 to move downward, and the downwardly moving side squeezing plate 104 will penetrate into the interior of the lower moving groove 110. In the process of the side squeezing plate 104 moving downward, it will gradually squeeze the inner moving positioning plate 105, and when the inner moving positioning plate When being squeezed, 105 will gradually approach the electrode rod 102, and when gradually approaching the electrode rod 102, the electrode rod 102 can be squeezed and limited, and the inner wall of the electrode rod 102 is gradually squeezed by multiple inner movable positioning plates 105, and when the upper wear-resistant pushing airbag 107 expands to a specified degree and pushes the side squeezing plate 104 to gradually squeeze the inner movable positioning plate 105 to completely fit the electrode rod 102, the electrode rod 102 can be limited and fixed, and the upper wear-resistant pushing airbag 107 squeezes the side The side extrusion plate 104 pushes the inner movable positioning plate 105 to extrude and limit the electrode rod 102, so that the extrusion limitation and fixation of the electrode rod 102 when it is replaced can be achieved. Because the extrusion limitation is performed by gas, the overall weight will not increase too much, and the gas inside the upper wear-resistant pushing airbag 107 will expand even when it is baked by the residual heat of the arc furnace 100, thereby further pushing the side extrusion plate 104 to move downward, and further pushing the inner movable positioning plate 105 to fit the outer wall of the electrode rod 102.

[0025] like Figure 1 As shown, the positioning structure includes two square support frames 600, the interior of the square support frame 600 is rotatably connected to a screw rod 601, the top of the square support frame 600 is fixedly connected to a drive motor 602, the output shaft of the drive motor 602 passes through the outer wall of the square support frame 600 and is fixedly connected to the screw rod 601, the external thread of the screw rod 601 is connected to a moving seat, and the outside of the moving seat is fixedly connected to the outer wall of the heat insulating shell 103.

[0026] Specifically, during the process of adjusting the up and down position of the heat insulating shell 103, the drive motor 602 can also be started to drive the screw rod 601 to rotate. When the screw rod 601 rotates, it will drive the moving seat and the heat insulating shell 103 to adjust the up and down position, thereby adjusting the up and down position of the electrode rod 102 when replacing the electrode rod 102.

[0027] Furthermore, in the process of connecting the old electrode rod 102 with the new electrode rod 102, the threaded column 800 and the lifting rope 704 can be separated. After the separation, the new electrode rod 102 is lifted to the top of the old electrode rod 102, and the threaded hole 801 at the bottom of the new electrode rod 102 is aligned with the threaded column 800 at the top of the old electrode rod 102, and the two are rotated and threadedly connected to complete the assembly of the two. The method of threaded connection using the threaded column 800 will not cause the new electrode rod 102 and the old electrode rod 102 to separate when being inserted into the interior of the arc furnace 100.

[0028] like Figure 5 As shown, an arc-shaped clamping plate 501 is integrally formed on one side of the side extrusion plate 104 close to the inner movable positioning plate 105, and an arc-shaped clamping groove 502 is opened on one side of the inner movable positioning plate 105 close to the side extrusion plate 104. Both sides of the side extrusion plate 104 are fixedly connected with side clamping plates 500, and the two side clamping plates 500 are respectively attached to the two sides of the inner movable positioning plate 105.

[0029] Specifically, in order to avoid misalignment between the single side extrusion plate 104 and the inner movable positioning plate 105, the inner movable positioning plate 105 is clamped and limited by side clamping plates 500 on both sides of the side extrusion plate 104 to avoid misalignment between the single side extrusion plate 104 and the inner movable positioning plate 105.

[0030] Furthermore, the arrangement of the arc-shaped clamping plate 501 can be clamped into the interior of the arc-shaped clamping groove 502 when the side extrusion plate 104 moves down to a specified degree, so that a clamping limit is formed between the arc-shaped clamping plate 501 and the arc-shaped clamping groove 502. The clamping limit formed between the side extrusion plate 104 and the inner movable positioning plate 105 can make the side extrusion plate 104 move down only to a specified degree, thereby preventing the side extrusion plate 104 from moving down too much and causing the side extrusion plate 104 to be clamped in the interior of the lower movable groove 110. When releasing, it is only necessary to reversely start the air pump 109 to drive the air pipe 108 to extract the gas inside the upper wear-resistant pushing airbag 107, so that the upper wear-resistant pushing airbag 107 will shrink and rebound, and the rebound of the upper wear-resistant pushing airbag 107 will drive the side squeezing plate 104 to move upward, and pull the side squeezing plate 104 back to the original position, so that the inner movable positioning plate 105 no longer has an squeezing and limiting effect on the electrode rod 102. When the inner movable positioning plate 105 no longer squeezes and limits the electrode rod 102, the clamping limit on the electrode rod 102 can be released.

[0031] The technical solution in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: relative to the prior art, in the present embodiment, when the electrode rod 102 is used for a long time so that the length of the electrode rod 102 becomes shorter and needs to be replaced or reorganized, the electrode rod 102 can be lifted, and after lifting, the gas is continuously injected into the interior of the upper wear-resistant pushing airbag 107 through the air pump 109. When the gas continues to enter the interior of the upper wear-resistant pushing airbag 107, the upper wear-resistant pushing airbag 107 will expand and drive the side squeezing plate 104 to move downward continuously. In the process of the side squeezing plate 104 moving downward continuously, the inner movable positioning plate 105 will be continuously squeezed, so that the inner movable positioning plate 105 is squeezed to fit the electrode rod 102, and the electrode rod 102 is limited and fixed in the process of gradually fitting the electrode rod 102. The overall use of gas as a power source greatly reduces the weight above the arc furnace 100, and will not cause the phenomenon of being unable to clamp or loosen due to high temperature.

[0032] Embodiment 2: Considering that during use, if the upper wear-resistant pushing airbag 107 located above the side squeezing plate 104 is suddenly damaged, the upper wear-resistant pushing airbag 107 will not be able to push the side squeezing plate 104 to the specified position in time, so that the side squeezing plate 104 cannot push the inner moving positioning plate 105 to squeeze and limit the electrode rod 102. In view of the above technical problems, the present application proposes the following technical solutions to solve the above technical problems, specifically: like Figure 1-Figure 9As shown, a plurality of side pushing bags 200 are integrally formed on one side of the inner wall of the heat insulating outer shell 103, and the plurality of side pushing bags 200 are respectively fixedly connected to a side of the plurality of side extrusion plates 104 away from the inner movable positioning plate 105, and the side pushing bags 200 are connected to the upper wear-resistant pushing airbag 107, and a one-way valve sheet 201 is connected to the connecting position between the side pushing bags 200 and the upper wear-resistant pushing airbag 107, and the outside of the side pushing bags 200 is connected to an electric control valve 202, and one end of the electric control valve 202 away from the side pushing bags 200 passes through the outer wall of the heat insulating outer shell 103.

[0033] Specifically, in the process of continuously injecting gas into the interior of the upward wear-resistant pushing airbag 107, when the upper wear-resistant pushing airbag 107 expands to a specified degree, the one-way valve sheet 201 will be pushed open, and after the one-way valve sheet 201 is pushed open, excess gas will continue to enter the interior of the side pushing bag 200, and when excess gas continues to enter the interior of the side pushing bag 200, the side pushing bag 200 will expand. When the side pushing bag 200 expands, it will continue to push the side extrusion plate 104 to further fit the inner movable positioning plate 105, and when the side extrusion plate 104 further fits the inner movable positioning plate 105, a secondary pushing and limiting effect can be formed, and even if one or more upper wear-resistant pushing airbags 107 are damaged, the side pushing bag 200 can ensure that the inner movable positioning plate 105 will not excessively loosen the limit on the electrode rod 102, thereby forming a better limiting effect as a whole.

[0034] Furthermore, when exhaust is required, the gas inside the side push bag 200 is exhausted by opening the electric control valve 202, thereby releasing the secondary push limit of the electrode rod 102.

[0035] The technical scheme in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: relative to embodiment one, in this embodiment, through the setting of the side pushing bag 200, when the gas enters the interior of the upper wear-resistant pushing bag 107 and the upper wear-resistant pushing bag 107 expands to a specified degree, when the gas is continuously injected into the interior of the upper wear-resistant pushing bag 107, the strong air pressure inside the upper wear-resistant pushing bag 107 will push open the one-way valve sheet 201, and after the one-way valve sheet 201 is pushed open, a large amount of gas will enter the interior of the side pushing bag 200, and the gas will cause the side pushing bag 200 to expand when it continues to enter the interior of the side pushing bag 200, and when the side pushing bag 200 expands, a secondary pushing limit will be formed, and when the secondary pushing limit is formed, even if a single or multiple upper wear-resistant pushing bags 107 are damaged, it can still be ensured that the side extrusion plate 104 pushes the inner movable positioning plate 105 to limit the electrode rod 102.

[0036] Embodiment 3: Considering that during the clamping process, when the side pushing bag 200 and the upper wear-resistant pushing air bag 107 leak at the same time, the side squeezing plate 104 and the inner movable positioning plate 105 will still return to their original positions, and the electrode rod 102 cannot be clamped stably in time, the present application proposes the following technical solutions to solve the above technical problems, specifically: like Figure 2-Figure 6 As shown, a plurality of inclined storage grooves 301 are provided on one side of the side extrusion plate 104 close to the inner movable positioning plate 105, and an outwardly protruding snap-in block 303 is hingedly connected inside the inclined storage groove 301. A pushing bag 302 is integrally formed on the side of the outwardly protruding snap-in block 303 close to the inclined storage groove 301, and a side of the pushing bag 302 away from the outwardly protruding snap-in block 303 is fixedly connected to the inner side wall of the pushing bag 302, and an air guide bag 300 is integrally formed on the bottom of the side pushing bag 200, and a side of the air guide bag 300 away from the side pushing bag 200 passes through the inner wall of the side extrusion plate 104 and is connected to the pushing bag 302.

[0037] Specifically, during use, when the upper wear-resistant pushing airbag 107 pushes the side extrusion plate 104 to move downward into the lower moving groove 110, and the gas continues to enter the side pushing bag 200, the gas inside the side pushing bag 200 will also enter the inside of the air guide bag 300. The gas entering the inside of the air guide bag 300 will continue to be diverted to the inside of the pushing bag body 302. When the gas is diverted to the inside of the pushing bag body 302, it will cause the pushing bag body 302 to expand. When the pushing bag body 302 expands, it will cause the pushing bag body 302 to push the protruding snap-in block 303 to protrude outward. When the protruding snap-in block 303 protrudes outward, it will form a resistance against the outer shell of the heat-insulating outer shell 103. When the protruding snap-in block 303 is in contact with the heat-insulating outer shell 103, even if the side push bag 200 and the upper wear-resistant push air bag 107 leak at the same time, the protruding snap-in block 303 that has been in contact with the heat-insulating outer shell 103 will ensure that the side extrusion plate 104 stays in the original position, and will not be displaced and retracted due to gas leakage. When no retraction displacement occurs, the side extrusion plate 104 will still produce continuous contact with the inner movable positioning plate 105, and ensure the extrusion limit of the electrode rod 102 under the condition of continuous contact, so as to avoid the phenomenon that the electrode rod 102 cannot be limited and connected when the upper wear-resistant push air bag 107 and the side push bag 200 leak at the same time.

[0038] Furthermore, the outer surfaces of the upper wear-resistant pushing airbag 107, the side pushing airbag 200 and the pushing airbag body 302 are coated with a layer of heat-insulating aerogel. By setting the heat-insulating aerogel, the upper wear-resistant pushing airbag 107, the side pushing airbag 200 and the pushing airbag body 302 can be insulated, thereby reducing the damage of the upper wear-resistant pushing airbag 107, the side pushing airbag 200 and the pushing airbag body 302 caused by excessive baking of the external residual heat when replacing the electrode rod 102. In addition, the heat-insulating outer shell 103, the side extrusion plate 104 and the inner movable positioning plate 105 are also made of heat-insulating materials. In order to reduce the damage of the upper wear-resistant pushing airbag 107, the side pushing airbag 200 and the pushing airbag body 302 caused by excessive heat, the gas injection into the upper wear-resistant pushing airbag 107, the side pushing airbag 200 and the pushing airbag body 302 can be cancelled and replaced with the injection of cooling water, which can also achieve the same effect and reduce the damage of the upper wear-resistant pushing airbag 107, the side pushing airbag 200 and the pushing airbag body 302 caused by high temperature.

[0039] Furthermore, when components inside the heat insulating shell 103 are damaged, a plurality of repair covers 900 are hinged to the outside of the heat insulating shell 103 , and the components inside the heat insulating shell 103 can be inspected by opening the repair covers 900 .

[0040] The technical scheme in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: relative to embodiment 2, in the present embodiment, the gas inside the side pushing bag 200 is diverted to the interior of the pushing bag body 302 through the air guide bag 300, so that the pushing bag body 302 can be expanded, and when the pushing bag body 302 is expanded, the pushing bag body 302 can push the protruding clamping block 303 to bulge out of the inclined storage groove 301, and when the protruding clamping block 303 bulges outward, it can abut against the heat insulating shell 103, and when it abuts against the heat insulating shell 103, it can ensure that even when the upper wear-resistant pushing airbag 107 and the side pushing bag 200 leak at the same time, the side extrusion plate 104 can still be maintained in the original position, thereby ensuring the extrusion and limiting effect of the inner movable positioning plate 105 on the electrode rod 102.

[0041] Embodiment 4: Considering that although the pushing capsule 302 can be made to bulge outward to form a snap connection by continuously injecting gas into the pushing capsule 302, after the protruding snap connection block 303 bulges outward, even if the gas inside the pushing capsule 302 is completely emptied, the pushing capsule 302 may not be able to return to its original state due to its own volume and inertial deformation, thereby causing the protruding snap connection block 303 to still have a local bulge. When the protruding snap connection block 303 still has a local bulge, the side extrusion plate 104 cannot return to its original position, thereby releasing the extrusion limit of the electrode rod 102. In view of the above technical problems, the present application proposes the following technical solutions to solve the above technical problems, specifically: like Figure 6 and Figure 7 As shown, one side of the inner wall of the pushing capsule 302 is fixedly connected with the electromagnet 400 , and the side of the inner wall of the pushing capsule 302 away from the electromagnet 400 is fixedly connected with the iron adsorption sheet 401 .

[0042] Specifically, when it is necessary to cancel the limit on the electrode rod 102, the gas inside the side pushing bag 200 and the upper wear-resistant pushing airbag 107 can be discharged, and by energizing the electromagnet 400, the electromagnet 400 will adsorb the iron adsorption sheet 401 when it is energized, thereby driving the side wall of the pushing bag 302 to be completely adsorbed at the position of the electromagnet 400, and when the side wall of the pushing bag 302 is completely adsorbed together, the protruding snap-in block 303 can be driven to return to the inside of the inclined storage slot 301, thereby avoiding the protruding snap-in block 303 from bulging out when not in use, and avoiding the protruding snap-in block 303 from affecting the side extrusion plate 104 from returning to its original position.

[0043] The technical solution in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: relative to the third embodiment, in the present embodiment, by energizing the electromagnet 400, the iron adsorption sheet 401 can drive the side wall of the capsule 302 and the outwardly protruding clamping block 303 to fit together into the inclined storage groove 301, so that the outwardly protruding clamping block 303 no longer bulges outward, so that when it is necessary to release the clamping of the electrode rod 102, the side squeezing plate 104 can smoothly return to its original position, thereby canceling the continuous squeezing of the inner movable positioning plate 105 and the electrode rod 102.

[0044] The above are only preferred embodiments of the present invention and are 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.

Claims

1. An electric arc furnace for producing fused α-alumina bricks, comprising an electric arc furnace (100), characterized in that: The arc furnace (100) is movably connected to an upper end cover (101), a movable through hole is provided on the upper end cover (101), an electrode rod (102) is inserted into the movable through hole, an outer sleeve of the electrode rod (102) is provided with a heat-insulating shell (103), an inner wall of the heat-insulating shell (103) is provided with a side annular movable groove (106), a plurality of inner movable positioning plates (105) are slidably connected to the inner side of the side annular movable groove (106), a plurality of side extrusion plates (104) are slidably connected to the inner side of the heat-insulating shell (103), a side of the inner movable positioning plate (105) away from the side extrusion plate (104) is in contact with the outer wall of the electrode rod (102), a side of the side extrusion plate (104) and the inner movable positioning plate (105) adjacent to each other is an inclined surface and is in contact with each other, and the heat-insulating shell (103) is provided with a side annular movable groove (106) on the inner side of the side annular movable groove (106). 03) is fixedly connected to the inner top wall of a plurality of upper wear-resistant pushing airbags (107), the plurality of upper wear-resistant pushing airbags (107) are interconnected through a hose, the side of the upper wear-resistant pushing airbag (107) away from the inner top wall of the heat-insulating shell (103) is fixedly connected to the upper surface of the side extrusion plate (104), the outside of the upper wear-resistant pushing airbag (107) is connected to an air supply pipe (108), one end of the air supply pipe (108) away from the upper wear-resistant pushing airbag (107) passes through the outer wall of the heat-insulating shell (103) and is connected to an air pump (109), the inner bottom wall of the heat-insulating shell (103) is provided with a lower movable groove (110), the bottom of the side extrusion plate (104) is inserted into the interior of the lower movable groove (110), and a hoisting structure and a positioning structure are respectively installed on the outside of the electric arc furnace (100).

2. The electric arc furnace for producing fused α-alumina bricks according to claim 1, characterized in that: A plurality of side push bags (200) are integrally formed on one side of the inner side wall of the heat-insulating outer shell (103); the plurality of side push bags (200) are respectively fixedly connected to a side of a plurality of side extrusion plates (104) away from the inner movable positioning plate (105); the side push bags (200) are connected to the upper wear-resistant push air bag (107); a one-way valve sheet (201) is connected to the communication position between the side push bags (200) and the upper wear-resistant push air bag (107); the outside of the side push bags (200) is connected to an electric control valve (202); one end of the electric control valve (202) away from the side push bags (200) passes through the outer wall of the heat-insulating outer shell (103).

3. The electric arc furnace for producing fused α-alumina bricks according to claim 2, characterized in that: A plurality of inclined storage grooves (301) are provided on a side of the side extrusion plate (104) close to the inner movable positioning plate (105); an outer protruding snap-fit ​​block (303) is hingedly connected inside the inclined storage groove (301); a pushing capsule (302) is integrally formed on a side of the outer protruding snap-fit ​​block (303) close to the inclined storage groove (301); a side of the pushing capsule (302) away from the outer protruding snap-fit ​​block (303) is fixedly connected to an inner side wall of the pushing capsule (302); an air guide bag (300) is integrally formed on the bottom of the side pushing bag (200); a side of the air guide bag (300) away from the side pushing bag (200) penetrates the inner wall of the side extrusion plate (104) and is in communication with the pushing bag (302).

4. The electric arc furnace for producing fused α-alumina bricks according to claim 3, characterized in that: An electromagnet (400) is fixedly connected to one side of the inner wall of the pushing capsule (302), and an iron adsorption sheet (401) is fixedly connected to the side of the inner wall of the pushing capsule (302) away from the electromagnet (400).

5. The electric arc furnace for producing fused α-alumina bricks according to claim 4, characterized in that: The hoisting structure comprises two threaded holes (801), the two threaded holes (801) are respectively opened at two ends of the electrode rod (102), a threaded column (800) is threadedly connected inside one of the threaded holes (801) located at the top of the electrode rod (102), a hoisting rope (704) is movably connected to the threaded column (800), an external hanging frame (700) is mounted outside the electric arc furnace (100), a pulley (701) is rotatably connected to the external hanging frame (700), the hoisting rope (704) is mounted outside the pulley (701), a winding motor (702) is mounted outside the electric arc furnace (100), an output shaft of the winding motor (702) is fixedly connected to a winding roller (703), and the hoisting rope (704) is wound around the outside of the winding roller (703).

6. The electric arc furnace for producing fused α-alumina bricks according to claim 1, characterized in that: The positioning structure comprises two square support frames (600), wherein the interior of the square support frame (600) is rotatably connected to a screw rod (601), the top of the square support frame (600) is fixedly connected to a drive motor (602), the output shaft of the drive motor (602) passes through the outer wall of the square support frame (600) and is fixedly connected to the screw rod (601), the outer surface of the screw rod (601) is threadedly connected to a movable seat, and the outer portion of the movable seat is fixedly connected to the outer wall of the heat-insulating shell (103).

7. The electric arc furnace for producing fused α-alumina bricks according to claim 1, characterized in that: Both sides of the side extrusion plate (104) are fixedly connected with side clamping plates (500), and the two side clamping plates (500) are respectively attached to the two sides of the inner movable positioning plate (105).

8. The electric arc furnace for producing fused α-alumina bricks according to claim 1, characterized in that: A plurality of renovation covers (900) are hingedly connected to the exterior of the heat-insulating housing (103).

9. The electric arc furnace for producing fused α-alumina bricks according to claim 1, characterized in that: An arc-shaped clamping plate (501) is integrally formed on one side of the side extrusion plate (104) close to the inner movable positioning plate (105), and an arc-shaped clamping groove (502) is provided on one side of the inner movable positioning plate (105) close to the side extrusion plate (104).

10. The electric arc furnace for producing fused α-alumina bricks according to claim 5, characterized in that: The exteriors of the upper wear-resistant propulsion airbag (107), the side propulsion airbag (200) and the propulsion bag body (302) are all coated with a layer of heat-insulating aerogel.

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