Rigid guide post anti-sway ladle cover lifter and control method

Abstract

The present application belongs to the technical field of hoist, and discloses a rigid guide column anti-sway ladle cover hoist, which comprises a bridge, the bottom of the bridge is provided with a hoist operating mechanism, the top of the bridge is slidably provided with a lifting mechanism, the lower part of the lifting mechanism is connected with a guide column, and one side of the bridge is provided with electrical equipment. Through the cooperation of the trolley end frame, the trolley frame, the trolley platform and other structures, the device can slide horizontally along the top rail of the bridge, drive the whole lifting mechanism to move in the direction perpendicular to the cart rail, realize the accurate positioning of the lifting appliance in the horizontal plane, the trolley platform provides operation space for maintenance and daily maintenance, the lifting mechanism drives the rotation of the winding drum to lift the lifting appliance through the steel wire rope, and the rigid guidance of the guide column restricts the horizontal shaking of the lifting appliance during lifting, so that the accurate alignment during the taking and placing of the ladle cover is ensured, and the effects of stable lifting of the lifting appliance and accurate positioning of the ladle cover are finally achieved.

Description

Technical Field

[0001] This invention belongs to the field of hoisting technology, specifically a rigid guide column anti-sway steel ladle cover hoist and its control method. Background Technology

[0002] The ladle cover lifting machine is a device installed above the ladle processing station for ladle cover addition and removal operations. After connecting the lifting device to the ladle cover, the lifting device is driven to lift and drop the ladle cover. The ladle cover is transferred between different stations by moving along the track by the gantry. Existing ladle cover lifting devices mostly use steel wire rope flexible suspension or hydraulic drive to lift the ladle cover. The lifting device is prone to swaying during lifting and horizontal movement.

[0003] CN205008562U discloses a ladle cover lifting machine for ladle cars, including a hydraulic power system, a guide wheel lifting system, a fixed welded frame, and a hook. The hydraulic cylinder tail support of the hydraulic power system is supported on the fixed guide frame of the fixed welded frame, and the hydraulic cylinder head support of the hydraulic power system is welded inside the lifting guide column body of the guide wheel lifting system. The fixed welded frame is sleeved on the outside of the guide wheel lifting system and is slidably connected to the guide wheel lifting system. The bracket of the fixed welded frame is fixedly connected to the workshop platform support beam, and the long and short beams of the fixed welded frame are fixedly connected to the workshop platform. The hook is hinged to the hook cradle at the bottom of the guide wheel lifting system. The lifting guide column body and the hook cradle are rigidly connected, allowing the lifting guide wheel device to move freely within the fixed guide frame. The hook can accurately lift the ladle cover. The structure is simple, the design is reasonable, the operation is convenient, it saves production time, and improves production efficiency.

[0004] The device guides the lifting of the hook by sliding the lifting guide column and the fixed guide frame. However, the fixed welded frame is welded to the workshop platform and cannot move along the track. The hydraulic drive is prone to leakage in the high-temperature environment near the ladle and cannot achieve horizontal movement of the lifting device and ladle cover between different work positions. Therefore, a rigid guide column anti-sway ladle cover hoist and control method are proposed. The ladle cover can be transferred between different work positions through the movable gantry. The rigid guide column limits the horizontal sway during the lifting process of the lifting device. The electric motor drive replaces the hydraulic system to adapt to the high-temperature working environment. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a rigid guide column anti-sway steel ladle cover elevator and its control method.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rigid guide column anti-sway steel ladle cover hoist, comprising a bridge frame, a hoist running mechanism installed at the bottom of the bridge frame, a lifting mechanism slidably installed at the top of the bridge frame, a guide column connected below the lifting mechanism, and electrical equipment installed on one side of the bridge frame; The hoist running mechanism includes an end beam body, a three-in-one reducer, and a drive wheel. The end beam body is fixed to the bottom of the bridge frame, the three-in-one reducer is installed on the end beam body, and the drive wheel is connected to the output end of the three-in-one reducer. The lifting mechanism includes a trolley end frame, a trolley frame, and a drum. The trolley end frame is slidably connected to the rail on the top of the bridge frame, the trolley frame is fixed to the top of the trolley end frame, and the drum is rotatably connected to the inside of the trolley frame. The guide post includes an outer guide post and an inner guide post. The top end of the outer guide post is fixedly connected to the trolley frame. The inner guide post is slidably inserted into the interior of the outer guide post in the vertical direction. A hook assembly is fixed to the bottom end of the inner guide post. A wire rope is wound on the drum, and the lower end of the wire rope is connected to the hook assembly.

[0007] Preferably, the hoist running mechanism further includes driven wheels, which are mounted on the end beam. The driving wheels and the driven wheels are symmetrically distributed along the end beam, and buffers are installed at both ends of the end beam.

[0008] Preferably, the lifting mechanism further includes a trolley platform, a trolley motor, and a reducer. The trolley platform is fixed to the top of the trolley frame, the trolley motor is mounted on the trolley end frame to drive the lifting mechanism to move laterally along the bridge frame, and the reducer is mounted on the trolley frame, with the output end of the reducer connected to the drum.

[0009] Preferably, the lifting mechanism further includes a brake, a brake wheel coupling, a half-tooth coupling, and a motor. The motor is mounted on the trolley frame, the half-tooth coupling is connected between the motor and the reducer, the brake is mounted on the input end of the reducer, and the brake wheel coupling is connected between the brake and the reducer.

[0010] Preferably, the hoisting mechanism further includes a bearing housing, a lifting height limiter, and an overload limiter. The bearing housing is supported at one end of the drum, the lifting height limiter is installed on the bearing housing to limit the extreme position of the hook assembly's rise, and the overload limiter is used to cut off the hoisting circuit when the hoisting load exceeds a set value.

[0011] Preferably, two sets of guide columns are provided, and the guide columns are symmetrically distributed about the central axis of the cable tray. The outer guide column is bolted to the trolley frame, and the inner guide column is bolted to the hook assembly. When the hook assembly is raised and lowered, the inner guide column slides along the inner wall of the outer guide column to limit the horizontal sway of the hook assembly.

[0012] Preferably, the guide post further includes a guide roller, which is mounted on the outer wall of the inner guide post, and the inner guide post is slidably connected to the inner wall of the outer guide post through the guide roller.

[0013] Preferably, the cable tray includes a main beam, legs, and an upper connecting beam. The top of the main beam is covered with a track for the lifting mechanism to run on. The legs are supported on the ground track, and the upper connecting beam connects the two main beams.

[0014] Preferably, the electrical equipment includes an electrical control box, a remote controller, and limit switches. The electrical control box is installed on the end beam of the cable tray. The remote controller is used to control the operation of the hoisting mechanism and the hoist running mechanism. The limit switches include a travel limit, a horizontal movement limit, and an upper and lower limit.

[0015] This invention also provides a method for operating a rigid guide column anti-sway steel ladle cover elevator, comprising the following steps: S1. When removing the cover, the hoisting mechanism drives the bridge to move along the trolley track to the processing station. The lifting mechanism drives the drum to rotate, causing the hook assembly to descend. When the hook assembly descends, the inner guide column slides downward along the outer guide column. After the hook of the hook assembly is connected to the ladle cover, the lifting mechanism drives the hook assembly to rise and lift the ladle cover. The inner guide column slides upward along the outer guide column with the hook assembly. The guide column limits the horizontal sway of the hook assembly during the lifting process. The hoisting mechanism drives the bridge to move to the standby station. S2. When the cover is added, the hoisting mechanism drives the bridge to move from the standby station to the processing station, the lifting mechanism drives the hook group to carry the ladle cover down to above the ladle, the inner guide column slides down along the outer guide column, and after the ladle cover is placed on the ladle, the hook of the hook group separates from the ladle cover. S3. After the hook assembly separates from the ladle cover, the lifting mechanism drives the hook assembly to rise, the inner guide column slides upward along the outer guide column with the hook assembly, the hoisting mechanism drives the bridge frame to return to the standby position, and the limit switch of the electrical equipment cuts off the corresponding operating circuit when the bridge frame moves and the hook assembly rises or falls to the limit position.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated arrangement of structures such as the trolley end frame, trolley frame, and trolley platform, enables the device to slide laterally along the top track of the bridge frame via the trolley end frame, driving the entire lifting mechanism to move in a direction perpendicular to the main track. This achieves precise positioning of the lifting device in the horizontal plane. The trolley frame provides installation support for lifting components such as the drum, reducer, and motor, ensuring transmission accuracy and connection rigidity between components. The trolley platform provides operating space for inspection and routine maintenance. The lifting mechanism drives the drum to rotate, which in turn drives the lifting device to rise and fall via the wire rope. The rigid guiding constraint of the guide column restricts the horizontal swaying of the lifting device during the lifting process, ensuring accurate alignment during the placement and removal of the ladle cover. Ultimately, this achieves the effect of smooth lifting and removal of the lifting device and precise positioning of the ladle cover.

[0017] This invention, through the coordinated arrangement of end beams, a three-in-one reducer, and drive wheels, enables the device to drive the drive wheels to rotate along the track via the three-in-one reducer, thereby moving the entire gantry longitudinally along the trolley track. This allows the hoist to move back and forth between the processing station and the standby station. The three-in-one reducer integrates the motor, brake, and reducer into one unit, reducing the number of transmission links and components, and lowering the failure rate and maintenance costs. The end beams provide a stable mounting foundation for the wheel sets and drive devices, ensuring uniform contact between the wheels and the track during operation and avoiding rail wear caused by uneven load operation. Ultimately, this achieves the effect of stable and reliable hoist operation and efficient station switching.

[0018] This invention, through the combination of outer guide columns, inner guide columns, and guide rollers, enables the device to form a rigid guide frame by fixing the outer guide column to the trolley frame. The inner guide column slides vertically along the inside of the outer guide column, forming a rigid constraint in the horizontal direction for the lifting and lowering of the hook assembly, limiting the horizontal swaying of the hook assembly under no-load and loaded conditions. The two sets of guide columns are symmetrically distributed about the central axis of the cable tray, providing guidance and constraint from both sides, preventing deflection of the hook assembly when it is subjected to force on one side. The guide rollers convert the sliding friction between the inner and outer guide columns into rolling friction, reducing the resistance of the lifting and lowering the wear of the guide column mating surfaces, ultimately achieving the effect of reliable lifting and lowering of the lifting device and low resistance of the guide column running. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall lifting and lowering structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged cross-sectional view of a portion of point A in the middle section; Figure 4 This is a schematic diagram of the overall side view structure of the present invention; Figure 5 This is a schematic diagram of the guide post structure of the present invention; Figure 6 This is a top view of the overall structure of the present invention; Figure 7 This is a schematic diagram of the lifting mechanism structure of the present invention; Figure 8 This is a schematic cross-sectional view of the lifting mechanism of the present invention.

[0020] In the diagram: 1. Cable tray; 2. Hoist running mechanism; 201. End beam body; 202. Three-in-one reducer; 203. Drive wheel; 204. Driven wheel; 3. Hoisting mechanism; 301. Trolley end frame; 302. Trolley frame; 303. Trolley platform; 304. Trolley motor; 305. Reducer; 306. Brake; 307. Brake wheel coupling; 308. Drum; 309. Half-gear coupling; 310. Electric motor; 311. Bearing housing; 312. Lifting height limiter; 313. Overload limiter; 314. Hook assembly; 4. Guide column; 5. Electrical equipment. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, those skilled in the art who have not made any innovative embodiments are all within the scope of protection of the present invention.

[0022] like Figures 1 to 8 As shown, the present invention provides a rigid guide column anti-sway steel ladle cover hoist, including a bridge frame 1. A hoist running mechanism 2 is installed at the bottom of the bridge frame 1, and a lifting mechanism 3 is slidably installed at the top of the bridge frame 1. A guide column 4 is connected below the lifting mechanism 3. An electrical device 5 is installed on one side of the bridge frame 1. The bridge frame 1 includes a main beam, legs, and an upper connecting beam. The top of the main beam is laid with a track for the hoisting mechanism 3 to run on. The legs are supported on the ground track. The upper connecting beam connects the two main beams. The electrical device 5 includes an electrical control box, a remote controller, and limit switches. The electrical control box is installed on the end beam of the bridge frame 1. The remote controller is used to control the operation of the lifting mechanism 3 and the hoist running mechanism 2. The limit switches include a travel limit, a horizontal movement limit, and an upper and lower limit.

[0023] The above scheme is adopted as follows: the main beam of the bridge frame 1 provides lateral track support for the hoisting mechanism 3. The outriggers support the main beam above the ground track, so that the entire gantry structure can move longitudinally along the ground track. The upper connecting beam connects the two main beams to form an integral frame structure. The hoisting machine running mechanism 2 drives the gantry to move between the processing station and the standby station along the trolley track. The hoisting mechanism 3 moves laterally along the top track of the main beam to achieve the positioning of the lifting device in the direction perpendicular to the trolley track. The guide column 4 provides rigid guidance and constraint for the lifting process of the lifting device. The electrical control box of the electrical equipment 5 is installed on the end beam to provide power and protection circuits for each mechanism. The remote control issues control commands to control the start, stop and speed adjustment of the hoisting mechanism 3 and the hoisting machine running mechanism 2. The travel limit of the limit switch restricts the longitudinal movement of the gantry, the horizontal movement limit restricts the lateral movement of the hoisting mechanism 3, and the upper and lower limit restricts the lifting of the lifting device. When each mechanism reaches the limit position, the corresponding running circuit is cut off.

[0024] like Figures 1 to 3 As shown, the hoist running mechanism 2 includes an end beam 201, a three-in-one reducer 202, and a drive wheel 203. The end beam 201 is fixed to the bottom of the bridge frame 1. The three-in-one reducer 202 is installed on the end beam 201. The drive wheel 203 is connected to the output end of the three-in-one reducer 202. The hoist running mechanism 2 also includes a driven wheel 204, which is installed on the end beam 201. The drive wheel 203 and the driven wheel 204 are symmetrically distributed along the end beam 201. Buffers are installed at both ends of the end beam 201.

[0025] The above scheme is adopted: the drive wheel 203 is driven to rotate along the ground track by the three-in-one reducer 202, which drives the end beam 201 and the bridge frame 1 fixed on it to move longitudinally along the direction of the trolley track, realizing the transfer of the hoist between the processing station and the standby station. The driven wheel 204 and the drive wheel 203 are symmetrically distributed along the end beam 201, so that the wheel pressure on both sides of the end beam 201 is evenly distributed, avoiding track wear and running deviation caused by unilateral load. The three-in-one reducer 202 integrates the motor, brake and reducer into one unit, reducing the connection links in the transmission chain and reducing the vibration and noise caused by the misalignment of the coupling. The buffers installed at both ends of the end beam 201 absorb the impact energy when the hoist runs to the limit position of the track end or collides with the equipment in the same span, reducing the impact of the collision on the gantry structure and electrical equipment 5.

[0026] like Figures 1 to 8As shown, the lifting mechanism 3 includes a trolley end frame 301, a trolley frame 302, and a drum 308. The trolley end frame 301 is slidably connected to the rail on the top of the bridge frame 1. The trolley frame 302 is fixed to the top of the trolley end frame 301. The drum 308 is rotatably connected to the inside of the trolley frame 302. The lifting mechanism 3 also includes a trolley platform 303, a trolley motor 304, and a reducer 305. The trolley platform 303 is fixed to the top of the trolley frame 302. The trolley motor 304 is mounted on the trolley end frame 301 to drive the lifting mechanism 3 to move laterally along the bridge frame 1. The reducer 305 is mounted on the trolley frame 302, and the output end of the reducer 305 is connected to the drum 308. The lifting mechanism 3 also includes a brake 306 and a brake wheel. The lifting mechanism 3 includes a coupling 307, a half-tooth coupling 309, and a motor 310. The motor 310 is mounted on the trolley frame 302. The half-tooth coupling 309 connects the motor 310 and the reducer 305. The brake 306 is mounted on the input end of the reducer 305. The brake wheel coupling 307 connects the brake 306 and the reducer 305. The lifting mechanism 3 also includes a bearing housing 311, a lifting height limiter 312, and an overload limiter 313. The bearing housing 311 is supported on one end of the drum 308. The lifting height limiter 312 is mounted on the bearing housing 311 to limit the lifting limit position of the hook assembly 314. The overload limiter 313 is used to cut off the lifting circuit when the lifting load exceeds the set value.

[0027] The above scheme is adopted: the trolley motor 304 drives the trolley end frame 301 to move laterally along the track at the top of the bridge frame 1, realizing the positioning and adjustment of the lifting mechanism 3 in the direction perpendicular to the main trolley track. The trolley frame 302 is fixed to the top of the trolley end frame 301 to provide an installation base for components such as the drum 308, reducer 305, and motor 310. The trolley platform 303 is fixed to the top of the trolley frame 302 to provide operating space for inspection and daily maintenance. The motor 310 transmits power to the reducer 305 through the half-tooth coupling 309. After the reducer 305 reduces the speed, it drives the drum 308 to rotate through the output end. When the drum 308 rotates, the wire rope wound on it is wound up accordingly. The lifting mechanism 314 is raised and lowered by the release mechanism. The brake 306 is installed at the input end of the reducer 305. When the power is off, it applies a braking torque to the drive shaft to stop the drum 308 from rotating. The brake wheel coupling 307 connects the brake 306 and the reducer 305 to transmit power and cooperates with the brake 306 to achieve braking. The bearing seat 311 supports one end of the drum 308 to ensure the rotation accuracy of the drum 308. The lifting height limiter 312 is installed on the bearing seat 311. When the hook assembly 314 rises to the limit position, it triggers and cuts off the lifting circuit to prevent the wire rope from overwinding. The overload limiter 313 cuts off the lifting circuit when the lifting load exceeds the set value to avoid overload operation of the lifting mechanism 3.

[0028] like Figures 1 to 8As shown, the guide post 4 includes an outer guide post and an inner guide post. The top of the outer guide post is fixedly connected to the trolley frame 302. The inner guide post is slidably inserted into the interior of the outer guide post in the vertical direction. A hook assembly 314 is fixed to the bottom of the inner guide post. A wire rope is wound on the drum 308. The lower end of the wire rope is connected to the hook assembly 314. There are two sets of guide posts 4. The guide posts 4 are symmetrically distributed about the central axis of the cable tray 1. The outer guide post is bolted to the trolley frame 302. The inner guide post is bolted to the hook assembly 314. When the inner guide post is raised and lowered with the hook assembly 314, it slides along the inner wall of the outer guide post to limit the horizontal sway of the hook assembly 314. The guide post 4 also includes a guide roller. The guide roller is installed on the outer wall of the inner guide post. The inner guide post is slidably connected to the inner wall of the outer guide post through the guide roller.

[0029] The above scheme is adopted: the top of the outer guide column is fixedly connected to the trolley frame 302, and the inner guide column is slidably inserted into the interior of the outer guide column in the vertical direction. The bottom end of the inner guide column is fixed with a hook assembly 314. The lower end of the wire rope wound on the drum 308 is connected to the hook assembly 314. When the drum 308 rotates and drives the hook assembly 314 to rise and fall, the inner guide column slides vertically along the inner wall of the outer guide column with the hook assembly 314. The outer guide column forms a rigid constraint on the inner guide column in the horizontal direction, limiting the horizontal swaying of the hook assembly 314 during the lifting and lowering process. The guide column 4 is provided with two sets of hook assemblies and is related to the cable tray 1. The central axis is symmetrically distributed. Two sets of guide columns 4 guide and constrain the hook assembly 314 from both sides to prevent the hook assembly 314 from deflecting when subjected to force on one side. The outer guide column is bolted to the trolley frame 302, and the inner guide column is bolted to the hook assembly 314, which facilitates the centering adjustment during installation and the replacement and maintenance after damage. The guide roller is installed on the outer wall of the inner guide column. The inner guide column rolls against the inner wall of the outer guide column through the guide roller, converting the sliding friction between the inner and outer guide columns into rolling friction, reducing the motion resistance of the inner guide column when it is raised and lowered, and reducing the wear of the mating surface of the guide column 4.

[0030] Working principle and usage process of the invention: The present invention provides a rigid guide column anti-sway ladle cover hoist for ladle covering and uncovering operations at the ladle processing station. The device consists of a bridge frame 1, a hoist running mechanism 2, a lifting mechanism 3, guide columns 4, and electrical equipment 5. The main beam of the bridge frame 1 is supported above the ground track by outriggers. The upper connecting beam connects the two main beams to form an integral gantry structure. The hoist running mechanism 2 is installed at the bottom of the bridge frame 1 to drive the gantry to move longitudinally along the trolley track. The lifting mechanism 3 is installed at the top of the main beam and moves laterally along the track. The guide columns 4 are connected between the lifting mechanism 3 and the hook assembly 314 to provide rigid guidance during the lifting process. The electrical equipment 5 provides power, control, and protection functions.

[0031] During the cap removal operation, the upper crane hoists the capped ladle into the VD furnace processing station. The operator issues a movement command via remote control, and the three-in-one reducer 202 drives the drive wheel 203 to rotate along the trolley track, which in turn moves the bridge frame 1 and the entire gantry frame along the trolley track toward the processing station. The driven wheel 204 rolls freely along the track as the gantry frame moves. During the longitudinal movement of the gantry frame, the travel limit switch monitors the position of the gantry frame in real time. When the gantry frame approaches the designated position of the processing station, the travel limit switch triggers a deceleration signal, and the three-in-one reducer 202 reduces the speed of the drive wheel 203 to slow down and stop the gantry frame. The buffers at both ends of the end beam 201 provide buffer protection when the gantry frame stops.

[0032] After the gantry reaches the processing station, the operator issues a lateral movement command via remote control. The trolley motor 304 drives the trolley end frame 301 to move laterally along the top track of the main beam, which in turn drives the hoisting mechanism 3 to move in a direction perpendicular to the trolley track, so that the hook assembly 314 is aligned with the lug position on the ladle cover. During the lateral movement, the horizontal movement limit switch monitors the travel of the trolley end frame 301 to prevent it from exceeding the track range.

[0033] After the hook assembly 314 is aligned with the ladle cover, the operator issues a descent command via remote control. The motor 310 transmits power to the reducer 305 through the half-tooth coupling 309. The reducer 305 reduces the speed and drives the drum 308 to rotate and release the wire rope. The hook assembly 314 moves downward under its own weight. The inner guide column slides downward along the inner wall of the outer guide column with the hook assembly 314. The guide roller rolls between the inner and outer guide columns to reduce the resistance of the lifting movement. The vertical sliding constraint of the inner guide column inside the outer guide column restricts the horizontal sway of the hook assembly 314 during the descent, so that the hook of the hook assembly 314 remains aligned with the lug of the ladle cover during descent.

[0034] After the hook assembly 314 descends to the position of the ladle cover lug, the operator manually connects the hook to the ladle cover lug and confirms safety. Then, the operator issues a lifting command via remote control. The motor 310 drives the reducer 305 to rotate the drum 308 in the opposite direction to wind up the wire rope. The hook assembly 314 lifts the ladle cover. The inner guide column slides upward along the inner wall of the outer guide column with the hook assembly 314. During the lifting process, the ladle cover is rigidly constrained by the guide column 4 and does not sway horizontally. The lifting height limiter 312 monitors the lifting position of the hook assembly 314. When the hook assembly 314 rises to the set height, it triggers and cuts off the lifting circuit. The drum 308 stops rotating. The brake 306 applies braking torque to the input end of the reducer 305 at the same time as the motor 310 is de-energized, keeping the hook assembly 314 at the set height position.

[0035] After the ladle cover is hoisted to the set height, the three-in-one reducer 202 drives the gantry to move along the trolley track towards the standby station, transferring the ladle cover above the standby station. The operator issues a descent command via remote control, and the hook assembly 314 descends to place the ladle cover in the support position of the standby station, completing the cover removal operation.

[0036] During the ladle capping operation, after the internal processing of the ladle is completed, the operator uses a remote control to move the gantry from the standby station to the processing station. The trolley motor 304 drives the lifting mechanism 3 to move laterally, aligning the hook assembly 314 with the ladle cap lug on the standby station. After the hook assembly 314 descends, it connects the hook to the ladle cap lug. The lifting mechanism 3 then drives the hook assembly 314 to rise, lifting the ladle cap. The three-in-one reducer 202 drives the gantry to move along the trolley track to the designated position at the processing station. The trolley motor 304 drives the lifting mechanism 3 to move laterally, aligning the ladle cap with the top of the ladle. The hook assembly 314 lowers with the ladle cap on it, placing the ladle cap on the ladle. The operator manually separates the hook from the ladle cap lug. The lifting mechanism 3 then drives the hook assembly 314 to rise, and the three-in-one reducer 202 drives the gantry back to the standby station, completing the capping operation.

[0037] Throughout the operation, the two sets of outer and inner guide columns of the guide column 4 are symmetrically distributed about the central axis of the cable tray 1, forming a double-sided rigid guiding constraint on the hook assembly 314. This restricts the horizontal sway of the hook assembly 314 under both no-load and loaded conditions. The overload limiter 313 monitors the lifting load in real time. When the sum of the weight of the ladle cover and the weight of the lifting device exceeds the set value, the lifting circuit is cut off, and the hook assembly 314 can only descend. Each limit switch cuts off the running circuit and connects the reverse running circuit when the corresponding mechanism reaches the limit position. The contactors, circuit breakers, and relays in the electrical control box provide short-circuit protection and undervoltage protection for the motors of each mechanism, ensuring the safe operation of the device during the cover-lifting and unlifting operation.

[0038] This device adopts a semi-automatic control mode. The operator issues operating commands for each mechanism via remote control. After receiving the commands, the electrical control box of electrical equipment 5 controls the start, stop, and speed adjustment of the corresponding motors, realizing the semi-automatic operation of the hoist running mechanism 2 and the lifting mechanism 3. During the lateral movement of the hook assembly 314, the horizontal movement limit switch monitors the displacement of the trolley end frame 301 and triggers a deceleration signal when it approaches the target position, causing the trolley motor 304 to decelerate and stop, thus achieving precise positioning of the lifting device in the horizontal plane. During the longitudinal movement of the gantry, the travel limit switch also achieves precise positioning of the gantry between the processing position and the standby position through a deceleration signal. A pressure sensor is installed on the hook assembly 314. After the hook is connected to the steel ladle cover lug, the pressure sensor detects the change in the load on the hook and feeds the signal back to the electrical control box. The electrical control box judges the connection status between the hook and the steel ladle cover based on the load change signal. When the load reaches the preset connection confirmation value, the lifting is confirmed to be completed. There is no need for the operator to manually confirm the lifting status, which improves the work efficiency and safety.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rigid guide column anti-sway steel ladle cover hoist, comprising a bridge frame (1), characterized in that: The bottom of the cable tray (1) is equipped with a hoist running mechanism (2), the top of the cable tray (1) is slidably equipped with a lifting mechanism (3), the bottom of the lifting mechanism (3) is connected with a guide column (4), and electrical equipment (5) is installed on one side of the cable tray (1). The hoist running mechanism (2) includes an end beam body (201), a three-in-one reducer (202), and a drive wheel (203). The end beam body (201) is fixed to the bottom of the bridge frame (1). The three-in-one reducer (202) is installed on the end beam body (201). The drive wheel (203) is connected to the output end of the three-in-one reducer (202). The lifting mechanism (3) includes a trolley end frame (301), a trolley frame (302), and a drum (308). The trolley end frame (301) is slidably connected to the track on the top of the bridge frame (1). The trolley frame (302) is fixed to the top of the trolley end frame (301). The drum (308) is rotatably connected to the inside of the trolley frame (302). The guide post (4) includes an outer guide post and an inner guide post. The top end of the outer guide post is fixedly connected to the trolley frame (302). The inner guide post is slidably inserted into the interior of the outer guide post in the vertical direction. A hook assembly (314) is fixed at the bottom end of the inner guide post. A wire rope is wound on the drum (308). The lower end of the wire rope is connected to the hook assembly (314).

2. The rigid guide column anti-sway steel ladle cover elevator according to claim 1, characterized in that: The hoist running mechanism (2) also includes a driven wheel (204), which is mounted on the end beam body (201). The driving wheel (203) and the driven wheel (204) are symmetrically distributed along the end beam body (201). Buffers are installed at both ends of the end beam body (201).

3. The rigid guide column anti-sway steel ladle cover elevator according to claim 1, characterized in that: The lifting mechanism (3) also includes a trolley platform (303), a trolley motor (304), and a reducer (305). The trolley platform (303) is fixed to the top of the trolley frame (302). The trolley motor (304) is mounted on the trolley end frame (301) to drive the lifting mechanism (3) to move laterally along the bridge frame (1). The reducer (305) is mounted on the trolley frame (302), and the output end of the reducer (305) is connected to the drum (308).

4. The rigid guide column anti-sway steel ladle cover elevator according to claim 3, characterized in that: The lifting mechanism (3) also includes a brake (306), a brake wheel coupling (307), a half-tooth coupling (309), and a motor (310). The motor (310) is mounted on the trolley frame (302). The half-tooth coupling (309) is connected between the motor (310) and the reducer (305). The brake (306) is mounted on the input end of the reducer (305). The brake wheel coupling (307) is connected between the brake (306) and the reducer (305).

5. The rigid guide column anti-sway steel ladle cover elevator according to claim 4, characterized in that: The lifting mechanism (3) further includes a bearing housing (311), a lifting height limiter (312), and an overload limiter (313). The bearing housing (311) is supported on one end of the drum (308). The lifting height limiter (312) is installed on the bearing housing (311) to limit the lifting limit position of the hook assembly (314). The overload limiter (313) is used to cut off the lifting circuit when the lifting load exceeds the set value.

6. The rigid guide column anti-sway steel ladle cover elevator according to claim 1, characterized in that: Two sets of guide columns (4) are provided. The guide columns (4) are symmetrically distributed about the central axis of the bridge frame (1). The outer guide column is bolted to the trolley frame (302), and the inner guide column is bolted to the hook assembly (314). When the inner guide column moves up and down with the hook assembly (314), it slides along the inner wall of the outer guide column to limit the swaying of the hook assembly (314) in the horizontal direction.

7. The rigid guide column anti-sway steel ladle cover elevator according to claim 6, characterized in that: The guide post (4) also includes a guide roller, which is installed on the outer wall of the inner guide post. The inner guide post is slidably connected to the inner wall of the outer guide post through the guide roller.

8. The rigid guide column anti-sway steel ladle cover elevator according to claim 1, characterized in that: The bridge frame (1) includes a main beam, legs and an upper connecting beam. The top of the main beam is covered with a track for the hoisting mechanism (3) to run on. The legs are supported on the ground track and the upper connecting beam is connected between the two main beams.

9. The rigid guide column anti-sway steel ladle cover elevator according to claim 1, characterized in that: The electrical equipment (5) includes an electrical control box, a remote controller and limit switches. The electrical control box is installed on the end beam of the cable tray (1). The remote controller is used to control the operation of the hoisting mechanism (3) and the hoist running mechanism (2). The limit switches include a walking limit switch, a horizontal movement limit switch and an upper and lower limit switch.

10. A method for operating a rigid guide column anti-sway steel ladle cover hoist, employing a rigid guide column anti-sway steel ladle cover hoist as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. When taking the cover, the hoisting mechanism (2) drives the bridge (1) to move along the trolley track to the processing station. The hoisting mechanism (3) drives the drum (308) to rotate so that the hook group (314) descends. When the hook group (314) descends, the inner guide column slides down along the outer guide column. After the hook of the hook group (314) is connected to the steel ladle cover, the hoisting mechanism (3) drives the hook group (314) to rise and lift the steel ladle cover. The inner guide column slides up along the outer guide column with the hook group (314). The guide column (4) restricts the horizontal sway of the hook group (314) during the lifting process. The hoisting mechanism (2) drives the bridge (1) to move to the standby station. S2. When the cover is added, the hoist running mechanism (2) drives the bridge frame (1) to move from the standby station to the processing station, and the lifting mechanism (3) drives the hook assembly (314) to carry the ladle cover down to the top of the ladle. The inner guide column slides down along the outer guide column. After the ladle cover is placed on the ladle, the hook of the hook assembly (314) separates from the ladle cover. S3. After the hook assembly (314) is separated from the ladle cover, the lifting mechanism (3) drives the hook assembly (314) to rise. The inner guide column slides upward along the outer guide column with the hook assembly (314). The hoist running mechanism (2) drives the bridge frame (1) to return to the standby position. The limit switch of the electrical equipment (5) cuts off the corresponding running circuit when the bridge frame (1) moves and the hook assembly (314) rises and falls to the limit position.

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