Electric furnace electro-hydraulic servo loading device

Abstract

The present application relates to electric arc furnace technical field, specifically to a kind of electric furnace electric liquid servo loading device, including pedestal, steel ladle, ladle cover and a pair of electro-hydraulic servo machine, the output shaft top of electro-hydraulic servo machine is coaxially connected with screw rod, a pair of screw rod is provided with the material hanging device for hanging electrode stick, electrode stick penetrates ladle cover, the top bucket mechanism for supporting the steel ladle in the form of standing is set in the front end of pedestal, the bottom of steel ladle is rotatably connected with the inner wall of the front end of pedestal on two sides of radius.The material hanging device is set, electrode stick is suspended by using electro-hydraulic servo machine and screw rod drive material hanging rod precise lifting, while the standby material rod is also suspended electrode stick by being set in the rear of material hanging rod;Start electro-hydraulic servo machine to drive material hanging rod to rise to the top of screw rod to trigger proximity switch, and control reversible motor to drive standby material rod to the top surface of material hanging rod to carry out the automatic replacement of new electrode stick, replace manual replacement, eliminate security risks.

Description

Technical Field

[0001] This invention relates to the field of electric arc furnace technology, specifically to an electro-hydraulic servo loading device for electric arc furnaces. Background Technology

[0002] Electro-hydraulic servo loading is a method of converting electrical energy into hydraulic energy. Through actuators, typically hydraulic cylinders or hydraulic motors, this hydraulic energy is converted into mechanical energy, generating linear or rotary motion and directly controlling the controlled object. When the current on the electrode rod changes, the position of the electrode rod changes accordingly, thereby controlling the position and speed of the workpiece. Electro-hydraulic servo loading enables high-precision and high-speed loading, and allows for control of the loading force and displacement.

[0003] An electric arc furnace is a piece of equipment used for material processing and smelting. It typically consists of a steel drum, electrode rods, and the metal to be melted. The electrode rods are usually made of highly conductive materials, such as tungsten or molybdenum, and the workpiece is melted by an electric arc generated at a high temperature. During processing, a high-temperature and high-pressure electric arc is generated between the electrode rods and the workpiece, producing molten metal with a high energy density. The distance between them is precisely controlled by an electro-hydraulic servo loading device to ensure the normal generation of the electric arc.

[0004] However, when pouring molten metal from an electric arc furnace, a power source is generally required to push and control it, which not only occupies space but also increases maintenance costs. Furthermore, the electrode rods are susceptible to corrosion and wear from the molten metal during use, necessitating replacement. Since the electrode rods are electrically connected, power must be disconnected before replacement to ensure worker safety, resulting in a low tolerance for error. Therefore, a cost-effective device for pouring molten metal and automatically replacing electrode rods is needed to ensure safety and save costs in electric arc furnace steelmaking. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this invention is to provide an electro-hydraulic servo loading device for electric furnaces to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides an electro-hydraulic servo loading device for an electric furnace, comprising a base, a steelmaking ladle, a ladle cover, and a pair of electro-hydraulic servo motors. The output shaft of each electro-hydraulic servo motor is coaxially connected to a lead screw. The pair of lead screws are equipped with a hanging device for suspending electrode rods. The electrode rods penetrate the ladle cover. The front end of the base is provided with a ladle-supporting mechanism for supporting the steelmaking ladle in an upright position. The bottom radial sides of the steelmaking ladle are rotatably connected to the inner wall of the front end of the base.

[0007] The material hanging device includes a material hanging rod threadedly connected to a pair of lead screws, a conductive block embedded in the front end hole wall of the material hanging rod, a pair of preparation rods rotatably connected to the rear end of the material hanging rod, and forward and reverse motors disposed on both sides of the rear end of the material hanging rod; the front end hole of the material hanging rod is located directly above the bucket lid and is fitted with an electrode rod, and the rear end of the preparation rod is also fitted with an electrode rod; a proximity switch is embedded between the tops of the pair of lead screws, and the proximity switch and the pair of forward and reverse motors are electrically connected by wires; an iron block corresponding to the proximity switch is adhered to the rear end of the material hanging rod.

[0008] The top barrel mechanism includes a top block that is slidably connected to the base in a ring, a push-pull rod that is rotatably connected to the rear of the top block, and a linkage rod that is hooked to the push-pull rod; the top block is a quarter-circular arc plate structure and is located below the front end of the steelmaking barrel; the linkage rod is vertically arranged and is first inserted into the barrel cover and then hooked to the hanging rod; the lower half of the linkage rod is fitted with a spring.

[0009] As a further improvement to this technical solution, a slot is provided in the front end hole wall of the hanging rod, the conductive block is inserted into the slot, a compression spring is provided at the inner end of the conductive block, and annular grooves are provided on the outer sides of the upper and lower ends of the electrode rod to engage with the conductive block. The rear end of the conductive block is connected to a wire that passes through the bottom surface of the rear end of the hanging rod and is connected to a power source. When the hanging rod drives the electrode rod down into the steelmaking ladle, an electric arc is generated between the bottom ends of the pair of electrode rods to melt the metal block at high temperature.

[0010] As a further improvement to this technical solution, the inner ends of the slot extend through the sides of the hanging rod, the conductive blocks protrude inwards on both sides and are bonded to the compression spring, and the other end of the compression spring is bonded to the opening on the side of the hanging rod.

[0011] As a further improvement to this technical solution, a bracket is provided at the lower middle of the rear end of the hanging rod, and a straight rod extends from one side of the front end of the material preparation rod to be sleeved with the output shaft of the forward and reverse motor. A sleeve hole is opened on the top surface of the rear end of the material preparation rod, and a flat groove is opened on the inner wall of the sleeve hole, and a locking block is inserted into the flat groove. The locking block is engaged with the annular groove of the electrode rod, and a V-shaped spring piece is glued to the inner end of the locking block.

[0012] As a further improvement to this technical solution, a pressure block is provided on the outer side of the top surface of the rear end of the material preparation rod. After the material preparation rod is flipped to the top surface of the hanging rod, the pressure block and the conductive block are slidably connected and the conductive block is moved backward. A push block is symmetrically embedded on the top surface of the hanging rod. A through groove is opened on the top surface of the material preparation rod. A through slot is opened on the top surface of the locking block. The push block is inserted into the through groove and the through slot, and the locking block is disengaged from the sleeve hole.

[0013] As a further improvement to this technical solution, the hanging rod has a rod hole in the middle, the lid has a handle welded to the radial rear side, the handle has a handle hole on the top surface, the push-pull rod is L-shaped and has a through hole on the top surface of its horizontal section, the top of the linkage rod has a boss that is fixedly connected to the top surface of the hanging rod by bolts, the middle of the linkage rod has a boss for supporting the lid, and the bottom of the linkage rod has a boss for supporting the push-pull rod.

[0014] As a further improvement to this technical solution, a connecting rod is hinged to the middle of the rear end of the top block. The top of the connecting rod is rotatably connected to the vertical section of the push-pull rod by a pin. An arc platform that engages with the top block is provided in the front end of the base. Sliding grooves are provided on both sides of the arc platform. The two sides of the top block are provided with convex edges that engage with the sliding grooves and can slide. A stop bar runs through the outer wall of the base. The stop bar is located above the rear section of the inner arc surface of the arc platform.

[0015] As a further improvement to this technical solution, a support platform is welded inside the base and above the rear half of the arc platform. The front end of the arc platform is provided with a clearance opening for engaging with the tilted steelmaking drum. Two pairs of protruding columns are welded on both radial sides of the steelmaking drum. The pair of protruding columns at the bottom are coaxially arranged with the arc platform, and the protruding column in the middle is sleeved with a rotating rod.

[0016] As a further improvement to this technical solution, the lower side of the rotating rod is sleeved with the protruding post at the bottom. The outer side of the base is embedded with a number of speed-reducing components that can be deformed under pressure to generate elastic force. The speed-reducing components are evenly distributed on the outer side of the base with the central axis of the arc platform as the rotation axis. The bottom inner side of the rotating rod is provided with a slot for engaging with the speed-reducing components. The speed-reducing components are made of spring steel with a thin-walled elliptical ring structure, and half of its width is in a contracted state and is set outward.

[0017] As a further improvement to this technical solution, the top surface of the bucket lid is symmetrically fitted with a material threading ring, and the bottom side wall of the material threading ring is provided with a flat opening and a plug is inserted into the flat opening.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This electric furnace electro-hydraulic servo loading device, through the set material hanging device, uses an electro-hydraulic servo motor and lead screw to drive the hanging rod to suspend the electrode rod for precise lifting and lowering. At the same time, a spare rod is set behind the hanging rod, which also suspends the electrode rod. When the electro-hydraulic servo motor is started, it drives the hanging rod to rise to the top of the lead screw, triggering a proximity switch, and controlling the forward and reverse motors to drive the spare rod to the top surface of the hanging rod for automatic replacement of the new electrode rod, replacing manual replacement and eliminating safety hazards.

[0020] 2. The electric arc furnace electro-hydraulic servo loading device, through the set top bucket mechanism, uses the top block and the support platform on the base to support the steelmaking bucket in an upright state. When the drive electro-hydraulic servo motor drives the hanging device to rise, the linkage rod drives the bucket cover to leave the top of the steelmaking bucket. At the same time, it drives the push-pull rod to lift the top block and then suspend the front of the steelmaking bucket below in the air. Under the weight of the steelmaking bucket, it tilts down with the base as support, thus completing the automatic pouring of molten metal, saving external space and power source investment costs. Attached Figure Description

[0021] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0022] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention in the steelmaking state;

[0023] Figure 2 For the present invention Figure 1 The main view;

[0024] Figure 3 This is a schematic diagram of the overall assembly structure of the present invention in the material lifting state;

[0025] Figure 4 This is the front view of invention 3;

[0026] Figure 5 This is a schematic diagram of the overall assembly structure of the present invention in the liquid-pouring state;

[0027] Figure 6 This is a front view of invention 5;

[0028] Figure 7 This is an exploded view of the base of the present invention;

[0029] Figure 8 This is an exploded view of the steelmaking ladle of the present invention;

[0030] Figure 9 This is a schematic diagram of the speed reduction component structure of the present invention;

[0031] Figure 10 This is a partial exploded view of the bucket lid of the present invention;

[0032] Figure 11 This is a schematic diagram of the assembly structure of the material-changing device of the present invention in the material-changing state;

[0033] Figure 12 This is an assembly disassembly diagram of the top block and push-pull rod of the present invention;

[0034] Figure 13 This is a split view of the hanging rod of the present invention;

[0035] Figure 14 This is a schematic diagram of the material preparation rod structure of the present invention;

[0036] Figure 15 This is an exploded view of the material preparation rod of the present invention.

[0037] The meanings of the labels in the diagram are as follows:

[0038] 100. Base; 101. Arc-shaped platform; 102. Support platform; 103. Clearance opening; 104. Slide groove; 105. Groove;

[0039] 110. Steelmaking ladle; 111. Protruding post; 120. Ladle lid; 121. Material threading ring; 122. Lid handle; 123. Insert block; 124. Handle hole; 130. Electro-hydraulic servo motor; 140. Lead screw; 150. Rotating rod; 151. Annular groove; 152. Slot; 160. Reducer; 170. Stop bar;

[0040] 200. Material hanging device; 210. Material hanging rod; 211. Bracket; 212. Rod hole; 213. Slot; 214. Push block; 220. Conductive block; 221. Compression spring;

[0041] 230. Material preparation rod; 231. Sleeve hole; 232. Clamping block; 2321. Through slot; 233. Spring piece; 234. Pressure block; 235. Through slot; 240. Forward and reverse motor; 250. Proximity switch;

[0042] 300. Top barrel mechanism; 310. Top block; 311. Connecting rod; 312. Protruding edge; 320. Push-pull rod; 321. Perforation; 330. Linkage rod. Detailed Implementation

[0043] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection or indirect connection through an intermediate medium.

[0044] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0045] Please see Figures 1-15 As shown, this invention provides an electro-hydraulic servo loading device for an electric furnace, including a base 100, a steelmaking ladle 110, a ladle cover 120, and a pair of electro-hydraulic servo motors 130. A lead screw 140 is coaxially connected to the top of the output shaft of each electro-hydraulic servo motor 130. The electro-hydraulic servo motor 130 mainly consists of an electrical signal processing device and a hydraulic power mechanism, which are existing technologies and will not be described in detail here. Its actuator generally refers to a hydraulic cylinder or a hydraulic motor; this invention uses a hydraulic motor. It converts hydraulic energy into mechanical energy, generating linear or rotary motion, and directly controls the controlled object.

[0046] That is, the control screw 140 rotates to drive the electrode rod to move up and down in the steelmaking ladle 110; the electric arc furnace first transmits electrical energy into the furnace by the electrode rod, then the electrode rod interacts with the metal in the furnace to generate an electric arc to raise the temperature in the furnace, and finally the high temperature melts the metal.

[0047] Specifically, a pair of lead screws 140 are equipped with a hanging device 200 for suspending electrode rods. The electrode rods pass through the barrel cover 120, which provides insulation and protection for the steelmaking barrel 110. The front end of the base 100 is equipped with a barrel-supporting mechanism 300 for supporting the steelmaking barrel 110 in an upright position. The bottom radial sides of the steelmaking barrel 110 are rotatably connected to the inner wall of the front end of the base 100. In other words, by using the barrel-supporting mechanism 300 to remove the supporting effect, the steelmaking barrel 110 can rotate on the base 100 under its own weight and pour out molten metal without the application of an additional power source, which helps to save on process and cost input.

[0048] Furthermore, the material hanging device 200 includes a material hanging rod 210 threadedly connected to a pair of lead screws 140, a conductive block 220 embedded in the front end hole wall of the material hanging rod 210, a pair of preparation rods 230 rotatably connected to the rear end of the material hanging rod 210, and a forward and reverse motor 240 disposed on both sides of the rear end of the material hanging rod 210; a plate is welded to the outer side of the rear end of the material hanging rod 210, and the forward and reverse motor 240 is fixedly connected to this plate by bolts; the front end hole of the material hanging rod 210 is located directly above the barrel cover 120 and is fitted with an electrode rod, and the rear end of the preparation rod 230 is also fitted with an electrode rod;

[0049] The top surface of the rear end of the hanging rod 210 is symmetrically provided with threaded holes, so that the hanging rod 210 can move up and down along the axis of the lead screw 140 when the pair of lead screws 140 rotate synchronously, thereby driving the electrode rod to move up and down; the conductive block 220 is made of conductive materials such as graphite and is used to energize the electrode rod.

[0050] The preparation rod 230 is used to suspend a pair of new electrode rods. When the electrode rods on the hanging rod 210 are severely worn, the forward and reverse motor 240 is started to drive the preparation rod 230 to rotate to the top surface of the hanging rod 210 to perform automatic electrode rod replacement, replacing manual rod replacement and eliminating unsafe operations.

[0051] It is worth noting that a proximity switch 250 is embedded between the tops of a pair of lead screws 140. The proximity switch 250 and a pair of forward and reverse motors 240 are electrically connected by wires. An iron block corresponding to the proximity switch 250 is attached to the rear end of the hanging rod 210.

[0052] As is well known to those skilled in the art, the proximity switch 250 is a non-contact switching device that can emit a proximity signal when it comes close to a metal object at a certain distance. The contacts inside the proximity switch will then actuate, triggering the connected electrical appliance to be energized or de-energized and stop, thereby automatically controlling the movement of the slave component connected to the electrical appliance.

[0053] The working principle of the reversible motor 240 is as well known to those skilled in the art. It is equipped with a reversible switch and connected to it by wires to form a reversible control circuit. The proximity switch 250 is connected to the forward rotation circuit of the reversible motor 240. The forward rotation circuit of the reversible motor 240 is connected to a time relay for controlling its reversible switch. When the inverted electrode rod on the material preparation rod 230 falls completely into the hanging rod 210, the time relay will start the reversible motor 240 to reverse, thereby driving the material preparation rod 230 to reset.

[0054] Specifically, such as Figure 13 As shown, a slot 213 is provided in the front end hole wall of the hanging rod 210, and the conductive block 220 is inserted into the slot 213. A compression spring 221 is provided at the inner end of the conductive block 220. The outer sides of the upper and lower ends of the electrode rod are provided with annular grooves that engage with the conductive block 220. The conductive block 220 can be wrapped with an iron plate to increase the strength of the graphite conductive block 220.

[0055] The rear end of the conductive block 220 is connected to a wire that passes through the bottom of the rear end of the hanging rod 210 and is connected to a power source. When the hanging rod 210 drives the electrode rod to descend into the steelmaking drum 110, the pair of electrode rods generate an electric arc between their bottom ends to melt the metal block at high temperature.

[0056] Furthermore, the inner ends of the slot 213 extend through the sides of the hanging rod 210, and the conductive block 220 protrudes inwards and is bonded to the compression spring 221. The other end of the compression spring 221 is bonded to the opening on the side of the hanging rod 210. The elastic force of the compression spring 221 is used to keep the conductive block 220 locked in the annular groove of the electrode rod and suspend the electrode rod.

[0057] Specifically, a bracket 211 is provided at the lower middle of the rear end of the hanging rod 210 to support the material preparation rod 230; a straight rod extends from one side of the front end of the material preparation rod 230 and is sleeved with the output shaft of the forward and reverse motor 240; a sleeve hole 231 is opened on the top surface of the rear end of the material preparation rod 230, and a flat groove is opened on the inner wall of the sleeve hole 231, and a locking block 232 is inserted into the flat groove; the locking block 232 is engaged with the annular groove of the electrode rod, and a V-shaped spring piece 233 is glued to the inner end of the locking block 232; the spring piece 233 is made of spring steel with a thin plate structure, that is, the elasticity of the spring piece 233 is used to keep the locking block 232 engaged with the annular groove of the electrode rod to suspend the electrode rod.

[0058] It is worth noting that, such as Figure 14 As shown, this is the material preparation rod 230 at the starting position. The outer side of the top surface of the rear end of the material preparation rod 230 is provided with a pressure block 234. The front side of the top edge of the pressure block 234 has a beveled structure. After the material preparation rod 230 flips to the top surface of the hanging rod 210, the pressure block 234 uses its beveled edge to slide and connect with the protruding conductive block 220 to form a guiding effect, so that the conductive block 220 moves backward, that is, the conductive block 220 separates from the annular groove of the electrode rod, and the electrode rod can fall down automatically and be collected.

[0059] The top surface of the lid 120 is symmetrically fitted with a material-passing ring 121 for inserting an electrode rod; the bottom side wall of the material-passing ring 121 has a flat opening and a plug 123 is inserted into the flat opening; that is, when the electrode rod rises and exits the material-passing ring 121, the two plugs 123 are inserted into the two material-passing rings 121 by moving them to seal the opening; after the electrode rod falls down, it can fall into the material-passing ring 121 and be supported by the plugs 123 so that the staff can pick it up.

[0060] like Figure 13 and Figure 15 As shown, the top surface of the hanging rod 210 is symmetrically fitted with a push block 214, the top surface of the preparation rod 230 is provided with a through groove 235 that runs vertically through the top, and the top surface of the locking block 232 is provided with a through groove 2321. The push block 214 is inserted into the through groove 235 and the through groove 2321, and the locking block 232 is disengaged from the sleeve hole 231; that is, the locking block 232 is separated from the annular groove of the electrode rod, and the electrode rod can automatically fall into the front end hole of the hanging rod 210; when the preparation rod 230 is driven to rotate and reset by the forward and reverse motor 240, the conductive block 220 loses the support of the pressure block 234 and resets under the action of the spring 221, and can be locked into the annular groove of the newly fallen electrode rod to suspend it;

[0061] The front end of the locking block 232 is attached with a rubber pad to increase the friction with the electrode rod, allowing the electrode rod to fall at a controllable speed. When changing the electrode rod, the operator can use a long rod to hold the bottom of the electrode rod to control its fall, thus ensuring that the conductive block 220 bounces into the annular groove of the electrode rod.

[0062] In addition, the top barrel mechanism 300 includes a top block 310 that is slidably connected to the base 100 in a ring, a push-pull rod 320 that is rotatably connected to the rear of the top block 310, and a linkage rod 330 that is hooked to the push-pull rod 320. The top block 310 is a quarter-circular arc plate structure and is located below the front end of the steelmaking barrel 110. The linkage rod 330 is vertically arranged and is first inserted into the barrel cover 120 and then hooked to the hanging rod 210. The lower half of the linkage rod 330 is fitted with a spring. When the linkage rod 330 descends, the spring squeezes the push-pull rod 320 to drive the top block 310 to rotate and push the empty steelmaking barrel 110 to flip up until it stands upright.

[0063] Furthermore, the hanging rod 210 has a rod hole 212 in the middle, the lid 120 has a lid handle 122 welded to the radial rear side, the lid handle 122 has a handle hole 124 on the top surface, the push-pull rod 320 is L-shaped and its horizontal section has a through hole 321 on the top surface, the linkage rod 330 has a boss at the top that is fixedly connected to the top surface of the hanging rod 210 by bolts, the linkage rod 330 has a boss in the middle for supporting the lid 120, and the linkage rod 330 has a boss at the bottom for supporting the push-pull rod 320.

[0064] That is, by raising and lowering the hanging rod 210, the linkage rod 330 is raised and lowered. When the linkage rod 330 rises, it drives the barrel cover 120 and the push-pull rod 320 to rise. Then the steelmaking barrel 110 loses the support of the top block 310 and tilts forward to pour out liquid, thus forming an automatic opening and pouring operation.

[0065] Specifically, a connecting rod 311 is hinged to the middle of the rear end of the top block 310. The top of the connecting rod 311 is rotatably connected to the vertical section of the push-pull rod 320 through a pin, so that the top block 310 and the push-pull rod 320 can be flexibly connected to each other, avoiding jamming.

[0066] The base 100 has an arc-shaped platform 101 at its front end that engages with the top block 310, which is used to support and guide the movement of the top block 310. The two side walls of the arc-shaped platform 101 are provided with sliding grooves 104. The two sides of the top block 310 are provided with convex edges 312 that engage with the sliding grooves 104 and can slide. The front end of the arc-shaped platform 101 is provided with a clearance opening 103 that engages with the tilted steelmaking drum 110, so that the top block 310 can be supported by the arc-shaped platform 101 when it is placed in the clearance opening 103 position.

[0067] like Figure 1 and Figure 2As shown, a stop bar 170 runs through the outer wall of the base 100. The stop bar 170 is located above the rear section of the inner arc surface of the arc platform 101. It is used to press down the top block 310 and the connecting rod 311 that have been rotated to the position. In this way, the linkage rod 330 and the push-pull rod 320 share most of the weight of the steelmaking drum 110 and the metal material.

[0068] Furthermore, a support platform 102 is welded inside the base 100 and above the rear half of the arc platform 101. The support platform 102 is offset from the middle of the bottom of the steelmaking drum 110. Since the top block 310 is supported at the bottom of the front end of the steelmaking drum 110, when the top block 310 rotates backward, the steelmaking drum 110 tilts forward and spills molten metal due to its own weight.

[0069] Two pairs of protruding pillars 111 are welded to the radial sides of the steelmaking drum 110. The pair of protruding pillars 111 at the bottom are coaxially arranged with the arc platform 101, that is, sleeved inside the side wall of the base 100. The protruding pillar 111 in the middle is sleeved with a rotating rod 150. The lower side of the rotating rod 150 is sleeved with the protruding pillar 111 at the bottom, so that the rotating rod 150 rotates synchronously with the steelmaking drum 110 around the base 100.

[0070] Furthermore, a plurality of reduction components 160, capable of being deformed under pressure to generate elastic force, are embedded on the outer surface of the base 100. These reduction components 160 are evenly distributed on the outer surface of the base 100 about the central axis of the arcuate platform 101; for example... Figure 7 The outer side of the base 100 is provided with several grooves 105 at equal intervals in a ring shape, and the bottom inner side of the rotating rod 150 is provided with a slot 152 for engaging with the speed reducer 160.

[0071] The reducer 160 is made of spring steel with a thin-walled elliptical ring structure, and half of its width is in a contracted state and facing outwards; the large end of the reducer 160 is engaged in the groove 105; the lower half of the inner side of the rotating rod 150 is symmetrically provided with annular grooves 151, the upper annular groove 151 is used to avoid the reducer 160, and the lower annular groove 151 is connected to the slot 152 to guide the reducer 160 to be smoothly engaged in the slot 152;

[0072] When the rotating rod 150 rotates, several speed reducers 160 engage with the slots 152 of the rotating rod 150. The rebound force of the deformed speed reducers 160 creates resistance against the rotating rod 150, which slows down the speed at which the steelmaking drum 110 tilts and pours liquid. In addition, the top block 310 rotates backward while supporting the steelmaking drum 110, thus forming an automatic tilting operation for pouring liquid from the steelmaking drum 110, replacing manual pouring and providing a safety function.

[0073] The top rear end of the aforementioned hanging rod 210, cover handle 122, and push-pull rod 320 are all fitted with long rods, the upper end of which is inserted into a fixing plate between a pair of lead screws 140, and the lower end of which is inserted into the base 100, thereby serving as a guide and limiting device.

[0074] When the electric furnace electro-hydraulic servo loading device of the present invention is used, the electro-hydraulic servo motor 130 is started to drive a pair of lead screws 140 to rotate, which in turn drives the hanging rod 210 to suspend the electrode rod and descend into the steelmaking ladle 110 until it is close to the metal in the ladle; then the electrode rod is energized, and the high temperature electric arc generated by it melts the metal into liquid.

[0075] When it is necessary to pour, the electro-hydraulic servo motor 130 is activated to drive a pair of lead screws 140 to control the lifting rod 210 to rise; at the same time, the linkage rod 330 is used to suspend the barrel cover 120 to rise away from the top of the steelmaking barrel 110, and the linkage rod 330 is used to suspend the push-pull rod 320 to rise, which drives the top block 310 in the front end of the base 100 to rotate backward. Because the center of the bottom of the front end of the steelmaking barrel 110 is suspended, it will flip down with the base 100 under gravity until it is stuck at the relief opening 103 and the molten metal is poured out.

[0076] When it is necessary to replace the electrode rod, continue to start the electro-hydraulic servo motor 130 to drive the hanging rod 210 to the top of the lead screw 140. Then, the iron block at the rear end of the hanging rod 210 approaches the proximity switch 250 to trigger the forward and reverse motor 240 to work, thereby driving the preparation rod 230 to rotate to the top surface of the hanging rod 210. At this time, the electrode rod in the hanging rod 210 loses the locking of the conductive block 220 and falls onto the barrel cover 120. The new electrode rod on the preparation rod 230 loses the locking of the locking block 232 and slowly falls into the front hole of the hanging rod 210 through the friction of the rubber pad.

[0077] When the new electrode rod is completely placed into the hanging rod 210, the time relay in the reverse circuit of the forward and reverse motor 240 will start the forward and reverse motor 240 to reverse, thereby driving the preparation rod 230 to reset. At this time, the conductive block 220 will hold the new electrode rod under the rebound of the compression spring 221, thus completing the automatic material changing operation, replacing manual rod changing and eliminating unsafe operation.

[0078] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An electro-hydraulic servo loading device for an electric furnace, comprising a base (100), a steelmaking ladle (110), a ladle cover (120), and a pair of electro-hydraulic servo motors (130), wherein a lead screw (140) is coaxially connected to the top of the output shaft of each electro-hydraulic servo motor (130), characterized in that: A pair of lead screws (140) are provided with a hanging device (200) for suspending electrode rods. The electrode rods pass through the barrel cover (120). The front end of the base (100) is provided with a barrel-supporting mechanism (300) for supporting the steelmaking barrel (110) in an upright state. The bottom radial sides of the steelmaking barrel (110) are rotatably connected to the inner wall of the front end of the base (100). The material hanging device (200) includes a material hanging rod (210) threadedly connected to a pair of lead screws (140), a conductive block (220) embedded in the front end hole wall of the material hanging rod (210), a pair of preparation rods (230) rotatably connected to the rear end of the material hanging rod (210), and a forward and reverse motor (240) disposed on both sides of the rear end of the material hanging rod (210); the front end hole of the material hanging rod (210) is located directly above the bucket cover (120) and is fitted with an electrode rod, and the rear end of the preparation rod (230) is also fitted with an electrode rod; a proximity switch (250) is embedded between the tops of the pair of lead screws (140), the proximity switch (250) and the pair of forward and reverse motors (240) are electrically connected by wires, and an iron block corresponding to the proximity switch (250) is adhered to the rear end of the material hanging rod (210); The top barrel mechanism (300) includes a top block (310) that is slidably connected to the base (100) in a ring, a push-pull rod (320) that is rotatably connected to the rear of the top block (310), and a linkage rod (330) that is hooked to the push-pull rod (320). The top block (310) is a quarter-circular arc plate structure and is located below the front end of the steelmaking barrel (110). The linkage rod (330) is vertically arranged and is first inserted into the barrel cover (120) and then hooked to the hanging rod (210). The lower half of the linkage rod (330) is fitted with a spring. A connecting rod (311) is hinged to the middle of the rear end of the top block (310). The top of the connecting rod (311) is rotatably connected to the vertical section of the push-pull rod (320) by a pin. The front end of the base (100) is provided with an arc platform (101) that engages with the top block (310). The two side walls of the arc platform (101) are provided with sliding grooves (104). The two sides of the top block (310) are provided with convex edges (312) that engage with the sliding grooves (104) and can slide. A stop bar (170) passes through the outer wall of the base (100). The stop bar (170) is located above the rear section of the inner arc surface of the arc platform (101). The outer side of the base (100) is fitted with several speed reduction components (160) that can be deformed under pressure to generate elastic force. When the steelmaking drum (110) rotates, the rebound force of the deformation of the speed reduction components (160) forms a resistance to the steelmaking drum (110) to slow down the pouring and turning speed of the steelmaking drum (110). In addition, with the addition of the top block (310) supporting the steelmaking drum (110) while rotating backward, the operation of automatically tilting the steelmaking drum (110) to pour liquid can be formed. At the same time, the bucket lid (120) is suspended by the linkage rod (330) and rises away from the top of the steelmaking bucket (110). The push-pull rod (320) is suspended by the linkage rod (330) and rises, causing the top block (310) in the front end of the base (100) to rotate backward. Because the center of the bottom of the front end of the steelmaking bucket (110) is suspended, it tilts downward with the base (100) under gravity and pours out the molten metal.

2. The electric furnace electro-hydraulic servo loading device according to claim 1, characterized in that: The front end of the hanging rod (210) has a slot (213) in the wall of the hole. The conductive block (220) is inserted into the slot (213). The inner end of the conductive block (220) is provided with a compression spring (221). The outer sides of the upper and lower ends of the electrode rod are provided with annular grooves that engage with the conductive block (220). The rear end of the conductive block (220) is connected to a wire that passes through the bottom surface of the rear end of the hanging rod (210) and is connected to a power source. When the hanging rod (210) drives the electrode rod to descend into the steelmaking drum (110), when the power is applied, an electric arc is generated between the bottom ends of the pair of electrode rods to melt the metal block at high temperature.

3. The electric furnace electro-hydraulic servo loading device according to claim 2, characterized in that: The inner ends of the slot (213) extend through the sides of the hanging rod (210). The conductive block (220) protrudes inward and is bonded to the compression spring (221). The other end of the compression spring (221) is bonded to the opening on the side of the hanging rod (210).

4. The electric furnace electro-hydraulic servo loading device according to claim 1, characterized in that: A bracket (211) is provided at the lower middle of the rear end of the hanging rod (210). A straight rod extends from one side of the front end of the preparation rod (230) and is sleeved with the output shaft of the forward and reverse motor (240). A sleeve hole (231) is opened on the top surface of the rear end of the preparation rod (230). A flat groove is opened on the inner wall of the sleeve hole (231) and a locking block (232) is inserted into the flat groove. The locking block (232) is engaged with the annular groove of the electrode rod. A V-shaped spring piece (233) is glued to the inner end of the locking block (232).

5. The electric furnace electro-hydraulic servo loading device according to claim 4, characterized in that: The rear end top surface of the material preparation rod (230) is provided with a pressure block (234). After the material preparation rod (230) flips to the top surface of the hanging rod (210), the pressure block (234) is slidably connected to the conductive block (220) and the conductive block (220) moves backward. The top surface of the hanging rod (210) is symmetrically embedded with a push block (214). The top surface of the material preparation rod (230) is provided with a through groove (235) that runs vertically through the top and bottom. The top surface of the locking block (232) is provided with a through groove (2321). The push block (214) is inserted into the through groove (235) and the through groove (2321) and the locking block (232) is removed from the sleeve hole (231).

6. The electric furnace electro-hydraulic servo loading device according to claim 1, characterized in that: The hanging rod (210) has a rod hole (212) in the middle. The lid (120) has a lid handle (122) welded to its radial rear side. The lid handle (122) has a handle hole (124) on its top surface. The push-pull rod (320) is L-shaped and has a through hole (321) on its horizontal section top surface. The top of the linkage rod (330) has a boss that is fixedly connected to the top surface of the hanging rod (210) by bolts. The middle part of the linkage rod (330) has a boss for supporting the lid (120). The bottom end of the linkage rod (330) has a boss for supporting the push-pull rod (320).

7. The electric furnace electro-hydraulic servo loading device according to claim 2, characterized in that: A support platform (102) is welded inside the base (100) and above the rear half of the arc platform (101). The front end of the arc platform (101) is provided with a clearance opening (103) that engages with the tilted steel drum (110). Two pairs of protruding columns (111) are welded on the radial sides of the steel drum (110). The pair of protruding columns (111) at the bottom are coaxially arranged with the arc platform (101), and the protruding column (111) in the middle is sleeved with a rotating rod (150).

8. The electric furnace electro-hydraulic servo loading device according to claim 7, characterized in that: The lower side of the rotating rod (150) is sleeved with the protruding post (111) at the bottom. Several speed reducers (160) are evenly distributed on the outer side of the base (100) with the central axis of the arc platform (101) as the rotation axis. The bottom inner side of the rotating rod (150) is provided with a slot (152) for engaging with the speed reducer (160). The speed reducer (160) is made of spring steel with a thin-walled elliptical ring structure and half of its width is in a contracted state and is set outward.

9. The electric furnace electro-hydraulic servo loading device according to claim 8, characterized in that: The top surface of the bucket lid (120) is symmetrically fitted with a material threading ring (121), and the bottom side wall of the material threading ring (121) has a flat opening and a plug (123) is inserted into the flat opening.

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