Double-beam metallurgical bridge crane

Abstract

A double-beam metallurgical bridge crane, including double-beam crane beam frame, the top end of crane beam frame is equipped with a hoist trolley, the top end of hoist trolley is equipped with main hoisting mechanism and auxiliary hoisting mechanism, the lower portion of main hoisting mechanism is equipped with a ladle lifting appliance, the ladle lifting appliance includes a support beam, the top end of support beam is fixed with a pulley assembly, the pulley assembly is connected to main hoisting mechanism through a wire rope, the lower portion of support beam is equipped with a main lifting hook, the lower portion of hoist trolley is equipped with an anti-sway mechanism, the anti-sway mechanism includes an outer support tube, the top end of outer support tube is assembled on left-right displacement mechanism, the lower end of outer support tube is sleeved with an inner support tube, the inside of outer support tube is equipped with an electric push rod, the bottom end of inner support tube is detachably fixed with an L-shaped baffle support, the lower end of baffle support is fixed with a vertically arranged baffle. The present application has the advantages of simple structure and convenient use.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment technology, and in particular relates to a double-beam metallurgical bridge crane. Background Technology

[0002] Bridge cranes are cranes that operate by moving longitudinally along the factory rails, laterally along the trolley, and by lifting and lowering the hook. Metallurgical bridge cranes are mainly used for lifting, feeding, and casting ladles of molten iron or steel in steelmaking processes. Therefore, they need to operate smoothly and cannot sway during lifting. For example, the patent announcement number CN221700950U, entitled "Utility Model Patent of a Double-Girder Metallurgical Bridge Crane," discloses an anti-sway component for a metallurgical crane. However, while existing technologies can solve the problem of anti-swaying of the lifting device, they cannot prevent the molten steel ladle on the hook from swaying. Therefore, when the crane transports the molten steel ladle, the ladle will still sway due to inertia. Thus, although existing technologies can solve the problem of swaying of the lifting device under the wire rope, they do not have an anti-swaying effect on the molten steel ladle hooked on the hook. Utility Model Content

[0003] To address the technical problem of molten steel ladles easily swaying due to inertia when lifted by existing bridge-type metallurgical cranes, this utility model provides a double-girder metallurgical bridge crane. The crane includes a double-girder crane frame, with a movably mounted lifting trolley at the top. The crane frame comprises two parallel and spaced main beams, with two symmetrically arranged end beams between them. Both ends of the main beams are detachably fixed to the end beams. The tops of both main beams are covered with trolley travel tracks parallel to the main beams. Both ends of the end beams are equipped with trolley travel mechanisms, each including trolley travel wheels and a trolley travel motor. The trolley travel wheels are rotatably mounted on the end beams, and the trolley travel motor is fixed to one side of the end beams. The power output shaft of the trolley travel motor is connected to the trolley travel wheels via a cable. Starting the trolley travel motor causes the trolley travel wheels to roll along the trolley travel tracks laid in the workshop, thus moving the crane frame longitudinally. The top of the crane trolley is equipped with a main lifting mechanism and an auxiliary lifting mechanism. Below the auxiliary lifting mechanism is an auxiliary hook, which is connected to the auxiliary lifting mechanism by a wire rope. Below the main lifting mechanism is a ladle lifting device, which includes a horizontally arranged support beam. The top of the support beam is fixed with a pulley assembly, which is connected to the main lifting mechanism by a wire rope. Below the support beam are two symmetrically arranged main hooks, with the upper ends of the main hooks mounted on both ends of the support beam. Two symmetrically arranged anti-sway mechanisms are installed below the crane trolley to prevent the molten steel ladle from swaying. The anti-sway mechanism includes a left-right displacement mechanism fixed to the bottom of the crane trolley and a vertically arranged outer support tube. The top of the outer support tube is mounted on the left-right displacement mechanism, and the bottom of the outer support tube is slidably fitted with a vertically arranged inner support tube. An electric push rod is installed inside the outer support tube. The top of the electric push rod is hinged to the top of the inner end of the outer support tube, and the bottom of the outer support tube is hinged to the top of the inner support tube. An L-shaped baffle bracket is detachably fixed to the bottom of the inner support tube. A vertically arranged baffle is fixed to the bottom of the baffle bracket. The electric push rod is connected to the power supply and PLC controller through a cable. When the electric push rod is activated, it pulls the inner support tube to slide along the inner wall of the outer support tube, thereby adjusting the height of the baffle. The left and right displacement mechanism includes a slide rail fixed to the bottom of the lifting trolley, with a groove on the slide rail. Vertically downward-facing support plates are fixed at both ends of the bottom of the slide rail. A horizontally positioned lead screw is located between the two support plates, with both ends of the lead screw rotatably mounted on the support plates via bearings. A lead screw motor is fixed to the outer side of one of the support plates, and the power output shaft of the lead screw motor is connected to the lead screw drive. A slider is threaded onto the lead screw, and the upper end of the slider is slidably connected to the groove. The top end of the outer support tube is detachably fixed to the bottom end of the slider. The lead screw motor is connected to a power source and a PLC controller via a cable. Starting the lead screw motor causes it to rotate, pushing the slider along the groove, thereby adjusting the slider's position in the left and right directions and thus adjusting the distance between the baffle and the molten steel ladle.

[0004] Preferably, the lifting trolley includes a trolley frame, and a trolley traveling mechanism is provided at the bottom of the trolley frame. The trolley traveling mechanism includes trolley traveling wheels and a trolley traveling motor. The trolley traveling wheels are rotatably mounted on the trolley frame. The power output shaft of the trolley traveling motor is connected to the trolley traveling motor via a transmission connection. The trolley traveling motor is connected to the power supply and the PLC controller via a cable. When the trolley traveling motor is started, it drives the trolley traveling wheels to rotate, and the trolley traveling wheels move along the trolley traveling track at the top of the main beam.

[0005] Preferably, both the main lifting mechanism and the auxiliary lifting mechanism include a lifting drum, which is rotatably mounted on the trolley frame. The top of the trolley frame is fixed with a trolley lifting motor and a reducer. The power output shaft of the trolley lifting motor is connected to the lifting drum via the reducer, and the trolley lifting motor drives the lifting drum to pull the wire rope.

[0006] The above scheme has the following advantages:

[0007] The left-right displacement mechanism, by adjusting the left-right distance between the baffle and the molten steel ladle, along with the electric actuator, outer support pipe, and inner support pipe, can adjust the height of the baffle, thereby preventing the molten steel ladle from swaying and improving stability. The auxiliary hook mechanism uses a wire rope to pull the molten steel ladle and tilt it. The trolley traveling mechanism drives the crane beam longitudinally, thereby adjusting the longitudinal position of the molten steel ladle lifting device. The trolley traveling mechanism drives the trolley to move left and right along the trolley travel track, thereby adjusting the left-right position of the molten steel ladle lifting device. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0009] Figure 2 This is a structural schematic diagram of a steel ladle lifting device;

[0010] Figure 3 This is a schematic diagram of the anti-shake mechanism;

[0011] Figure 4 This is a schematic diagram of the left and right displacement mechanism.

[0012] Reference numerals: 1. Crane beam; 2. Crane trolley; 3. Ladle lifting device; 4. Anti-sway mechanism; 5. Left and right displacement mechanism; 6. Ladle; 11. Main beam; 111. Trolley travel track; 12. End beam; 13. Trolley travel mechanism; 21. Main hoisting mechanism; 22. Auxiliary hoisting mechanism; 23. Trolley travel mechanism; 221. Auxiliary hook; 23. Trolley travel mechanism; 31. Support beam; 32. Pulley assembly; 33. Main hook; 41. Outer support pipe; 42. Inner support pipe; 43. Electric actuator; 44. Baffle bracket; 45. Baffle; 51. Slide rail; 52. Slide groove; 53. Support plate; 54. Lead screw; 55. Lead screw motor; 56. Slider. Detailed Implementation

[0013] like Figure 1-4As shown, a double-girder metallurgical bridge crane includes a double-girder crane beam 1. A crane trolley 2 is movably mounted on the top of the crane beam 1. The crane beam 1 includes two parallel and spaced main beams 11. Two symmetrically arranged end beams 12 are provided between the two main beams 11. The two ends of the main beams 11 are detachably fixed to the end beams 12. The top of each of the two main beams 11 is covered with a trolley travel track 111 parallel to the main beams 11. Both ends of the end beams 12 are provided with a trolley travel mechanism 13. The trolley travel mechanism 13 includes a trolley travel wheel and a trolley travel motor. The trolley travel wheel is rotatably mounted on the end beam 12. The trolley travel motor is fixed to one side of the end beam 12, and the power output shaft of the trolley travel motor is connected to the trolley travel wheel via a transmission connection. The trolley travel motor is connected to a power supply and a PLC controller via a cable. When the trolley travel motor is started, it drives the trolley travel wheel to roll along the trolley travel track laid in the workshop, and drives the crane beam 1 to move longitudinally. The top of the crane trolley 2 is provided with a main lifting mechanism 21 and an auxiliary lifting mechanism 22. The auxiliary lifting mechanism 22 is provided with an auxiliary hook 221 below it. The auxiliary hook 221 is connected to the auxiliary lifting mechanism 22 via a wire rope. The ladle lifting device 3 is provided below the main lifting mechanism 21. The ladle lifting device 3 includes a horizontally arranged support beam 31. The top of the support beam 31 is fixed with a pulley assembly 32. The pulley assembly 32 is connected to the main lifting mechanism 21 via a wire rope. The support beam 31 is provided with two symmetrically arranged main hooks 33 below it. The upper ends of the main hooks 33 are mounted on both ends of the support beam 31. Two symmetrically arranged anti-sway mechanisms 4 are provided below the crane trolley 2 to prevent the ladle 6 from shaking. The anti-sway mechanism 4 includes a left-right displacement mechanism 5 fixed to the bottom of the crane trolley 2 and a vertically arranged outer support pipe 41. The top of the outer support pipe 41 is mounted on the left-right displacement mechanism 5. The lower end of the outer support pipe 41 is slidably fitted with a vertically arranged inner support pipe 42. An electric push rod 43 is provided inside the outer support pipe 41. The top of the electric push rod 43 is hinged to the top of the inner end of the outer support pipe 41, and the bottom end of the outer support pipe 41 is hinged to the top of the inner support pipe 42. An L-shaped baffle bracket 44 is detachably fixed to the bottom end of the inner support pipe 42. A vertically arranged baffle 45 is fixed to the lower end of the baffle bracket 44. The electric push rod 43 is connected to the power supply and PLC controller through a cable. When the electric push rod 43 is activated, the electric push rod 43 pulls the inner support pipe 42 to slide along the inner wall of the outer support pipe 41, thereby adjusting the height of the baffle 45.The left and right displacement mechanism 5 includes a slide rail 51 fixed to the bottom of the lifting trolley 2. The slide rail 51 has a groove 52. Both ends of the bottom of the slide rail 51 are fixed with vertically downward support plates 53. A horizontally arranged lead screw 54 is provided between the two support plates 53. The two ends of the lead screw 54 are rotatably mounted on the support plates 53 through bearings. A lead screw motor 55 is fixed to the outside of one of the support plates 53. The power output shaft of the lead screw motor 55 is connected to the lead screw 54. A slider 56 is threaded on the lead screw 54. The upper end of the slider 56 is slidably connected to the groove 52. The top end of the outer support tube 41 is detachably fixed to the bottom end of the slider 56. The lead screw motor 55 is connected to the power supply and PLC controller through a cable. When the lead screw motor 55 is started, the lead screw motor 55 drives the lead screw 54 to rotate. The lead screw 54 pushes the slider 56 to slide along the groove 52, thereby adjusting the position of the slider 56 in the left and right direction, thereby adjusting the distance between the baffle 45 and the ladle 6.

[0014] Preferably, the lifting trolley 2 includes a trolley frame, and a trolley traveling mechanism 23 is provided at the bottom of the trolley frame. The trolley traveling mechanism 23 includes trolley traveling wheels and a trolley traveling motor. The trolley traveling wheels are rotatably mounted on the trolley frame. The power output shaft of the trolley traveling motor is connected to the trolley traveling motor via a transmission connection. The trolley traveling motor is connected to the power supply and the PLC controller via a cable. When the trolley traveling motor is started, the trolley traveling motor drives the trolley traveling wheels to rotate. The trolley traveling wheels move along the trolley traveling track at the top of the main beam 11.

[0015] Preferably, both the main lifting mechanism 21 and the auxiliary lifting mechanism 22 include a lifting drum, which is rotatably mounted on the trolley frame. The top of the trolley frame is fixed with a trolley lifting motor and a reducer. The power output shaft of the trolley lifting motor is connected to the lifting drum via the reducer, and the trolley lifting motor drives the lifting drum to pull the wire rope.

[0016] Usage process:

[0017] In use, the crane beam 1 is adjusted longitudinally via the trolley traveling mechanism 13, and the ladle lifting device 3 is adjusted laterally via the lifting trolley 2. After the ladle lifting device 3 is adjusted, its height is adjusted via the main lifting mechanism 21. Then, the main hook 33 is hooked onto the lifting lug on the ladle 6. The ladle 6 is then lifted to a certain height via the main lifting mechanism 21. Next, the electric actuator 43 is activated, and its free end extends and pushes the inner support tube 42 along... The inner wall of the outer support tube 41 slides down until the baffle 45 moves down to both sides of the ladle 6. Then the lead screw motor 55 is started. The lead screw motor 55 drives the lead screw 54 to rotate and push the slider 56 to move along the slide groove 52 toward the ladle 6 until the baffle 45 contacts and abuts the ladle 6. Then the ladle 6 is moved to the designated position. The baffle 45 is moved away from the ladle 6 by the left and right displacement mechanism 5 and the electric push rod 43. Then the auxiliary hook 221 is hooked on the lower end of the ladle 6 and the molten steel in the ladle 6 is poured out of the ladle 6.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A double-girder metallurgical bridge crane, comprising a double-girder crane beam frame, a movably mounted lifting trolley at the top of the crane beam frame, a main lifting mechanism and an auxiliary lifting mechanism at the top of the lifting trolley, an auxiliary hook below the auxiliary lifting mechanism, the auxiliary hook being connected to the auxiliary lifting mechanism via a wire rope, characterized in that: Below the main hoisting mechanism is a ladle lifting device, which includes a horizontally arranged support beam. A pulley assembly is fixed to the top of the support beam, and the pulley assembly is connected to the main hoisting mechanism via a wire rope. Below the support beam are two symmetrically arranged main hooks, the upper ends of which are mounted on both ends of the support beam. Below the hoisting trolley are two symmetrically arranged anti-sway mechanisms to prevent the ladle from swaying. The anti-sway mechanism includes a left-right displacement mechanism fixed to the bottom of the hoisting trolley and a vertically arranged outer support tube. The top of the outer support tube is mounted on the left-right displacement mechanism, and the lower end of the outer support tube is slidably fitted with a vertically arranged inner support tube. An electric actuator is located inside the outer support tube, with its top hinged to the inner top of the outer support tube. The bottom end of the outer support tube is hinged to the top of the inner support tube. The bottom end of the inner support tube is detachably fixed with an L-shaped baffle bracket, and the lower end of the baffle bracket is fixed with a vertically arranged baffle.

2. A double-girder metallurgical bridge crane according to claim 1, characterized in that: The left and right displacement mechanism includes a slide rail fixed to the bottom of the lifting trolley, with a slide groove on the slide rail. Vertically downward support plates are fixed at both ends of the bottom of the slide rail. A horizontally arranged lead screw is provided between the two support plates. The two ends of the lead screw are rotatably mounted on the support plates through bearings. A lead screw motor is fixed to the outside of one of the support plates. The power output shaft of the lead screw motor is connected to the lead screw drive. A slider is threaded onto the lead screw. The upper end of the slider is slidably connected to the slide groove. The top end of the outer support tube is detachably fixed to the bottom end of the slider.

3. A double-girder metallurgical bridge crane according to claim 1, characterized in that: The crane beam frame includes two parallel and spaced main beams, with two symmetrically arranged end beams between the two main beams. The two ends of the main beams are detachably fixed to the end beams, and the top of both main beams is covered with trolley travel tracks that are parallel to the main beams.

4. A double-girder metallurgical bridge crane according to claim 3, characterized in that: Both ends of the end beam are equipped with a trolley traveling mechanism, which includes a trolley traveling wheel and a trolley traveling motor. The trolley traveling wheel is rotatably mounted on the end beam, and the trolley traveling motor is fixed on one side of the end beam. The power output shaft of the trolley traveling motor is connected to the trolley traveling wheel via a transmission.

5. A double-girder metallurgical bridge crane according to claim 1, characterized in that: The crane trolley includes a trolley frame, and a trolley traveling mechanism is provided at the bottom of the trolley frame. The trolley traveling mechanism includes trolley traveling wheels and a trolley traveling motor. The trolley traveling wheels are rotatably mounted on the trolley frame, and the power output shaft of the trolley traveling motor is connected to the trolley traveling motor in a transmission connection.

6. A double-girder metallurgical bridge crane according to claim 5, characterized in that: Both the main lifting mechanism and the auxiliary lifting mechanism include a lifting drum, which is rotatably mounted on the trolley frame. The top of the trolley frame is fixed with a trolley lifting motor and a reducer. The power output shaft of the trolley lifting motor is connected to the lifting drum via the reducer.

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