Long-stroke narrow-working condition bridge crane wire rope anti-twisting device and rotary lifting method

Abstract

A device for preventing the twisting of a wire rope of a bridge crane in a long-stroke and narrow-working condition and a method for rotating and lifting the same include a guide frame, a connecting screw, and a clamping plate. The guide frame includes a mounting section in the middle and oblique support sections located at both ends of the mounting section. The oblique support section and the mounting section form an angle that matches the inclined surfaces on both sides of the nut column. Guide rollers are installed at the ends of the oblique support sections on both sides. Two guide frames are provided, and the two guide frames are arranged in a state where the guide rollers are away from each other. Two connecting screws are installed on the mounting section of the guide frame. Two clamping plates are installed on the connecting screw located between the two guide frames. After the guide frames on both sides are installed to the web of the pulley block of the hook through the clamping plates and the connecting screws, the lifting equipment can be rotated and lifted in a long-stroke and narrow-working condition without the wire rope of the bridge crane becoming entangled and the movable pulley block and the hoisted equipment colliding with the nut column.

Description

Technical Field

[0001] The present invention relates to the technical field of ship lift installation and maintenance, and in particular to a long-stroke narrow-working-condition bridge crane wire rope anti-twisting device and a rotary lifting and hoisting method. Background Art

[0002] When installing the docking lock and safety mechanism on the Three Gorges Shiplift's overhead crane (bridge crane), the equipment must ascend and descend while rotating within the nut standoffs, with travels exceeding 100 meters. Under these conditions, the crane's wire rope is prone to tangling, and conventional wire rope fixtures are insufficient for the required rotation and lifting. Furthermore, longer wire ropes increase the risk of the equipment swaying, posing a risk of impact with the nut standoffs on either side. Successfully addressing this issue has become crucial for overhauling the docking lock and safety mechanism on the Three Gorges Shiplift.

[0003] Chinese patent document CN113322921A, publication / announcement date: August 31, 2021, discloses a method for dismantling a ship lift safety mechanism, wherein the ship lift safety mechanism includes a servo motor driven mechanical synchronization device, a control cabinet, a winch-type door opener, a drum, and a limit detection device. The drum is wound with a cable, the cable is connected to the servo motor driven mechanical synchronization device, the drum is connected to the control cabinet, the winch-type door opener is connected to the control cabinet, and the limit detection device is connected to the end of the cable on the drum. By using a method for dismantling a ship lift safety mechanism of the present invention, the construction workload can be greatly reduced and manpower can be saved. By putting in and removing the servo motor driven mechanical synchronization device, the utilization rate of the winch-type door opener in the system can be effectively improved, and the operation and installation method is simple, which improves the safety of the disassembly, assembly and maintenance of the ship lift safety mechanism. Its disadvantage is that in actual working conditions, due to the rotation of the hoisted screw, it is very easy to cause the main hook and pulley group of the bridge crane to rotate together, thereby causing the wire ropes to rotate and entangle with each other during a long stroke, making it impossible to complete the hoisting safely and damaging the bridge crane wire rope. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned background technology, and to provide a long-stroke and narrow-working-condition bridge crane wire rope anti-entanglement device, through which rotary lifting under long-stroke and narrow working conditions is realized, and the bridge crane wire rope is not entangled, and the movable pulley group and the hoisted equipment do not collide with the nut column.

[0005] Another technical problem to be solved by the present invention is to provide a method for rotating, lifting and hoisting using the long-stroke, narrow-working-condition bridge crane wire rope anti-twisting device.

[0006] The cam is secured to the upper edge of the ladder by means of a latch, and the latch is secured to the upper edge of the ladder by means of a latching mechanism, wherein the latch is secured to the upper edge of the ladder by means of a latching mechanism.

[0007] The guide roller comprises a wheel seat, a core shaft, and a roller. The roller is mounted on the wheel seat via the core shaft, and the wheel seat is fixedly connected to the oblique support section.

[0008] The guide frame is formed by welding angle steels.

[0009] The method for rotating, lifting and hoisting using the long-stroke, narrow-working-condition bridge crane wire rope anti-twisting device comprises the following steps:

[0010] Step 1: Assemble the guide frame. The spacing between the guide rollers at both ends of the guide frame matches the inclined surfaces on both sides of the nut standoff. The angle between the inclined support section and the mounting section matches the angle of the inclined surface on the nut standoff. When the guide frame moves up and down, the guide rollers can support the inclined surfaces of the nut standoff.

[0011] Step 2: Fix the wire rope pulley assembly of the bridge crane; lift the movable pulley assembly and hook of the bridge crane to the appropriate position and height, connect the two guide frames through the double-headed screw and nut, use the guide frame and the clamping plate to clamp the connecting web of the wire rope pulley assembly above the rotating part of the hook, and tighten the nut to clamp the guide frame and the clamping plate to the connecting web;

[0012] Step 3: Install the lifting lugs on the hoisted equipment, and use the bridge crane to lift the wire rope pulley assembly, hook, and anti-twist device to the position above the nut column. Connect the hook to the lifting lugs with a lifting strap.

[0013] Step 4: Rotational lifting; the outer ring of the hoisted equipment has a spiral thread, and the nut column has the same spiral groove. The hoisted equipment rotates up or down along the spiral line in the nut columns on both sides; rotate the hoisted equipment to make it rotate around the axis, and at the same time start the bridge crane to retract or lower the wire rope, thereby slowly raising or lowering the hook. The rotational lifting is achieved through vertical movement and circumferential rotation, so that the hoisted workpiece is lifted and lowered along the spiral line; Among them, since the guide frame of the anti-twisting device is stuck on both sides of the nut column, and the guide frame fixes the connecting web of the bridge crane wire rope pulley group, only the hook below the anti-twisting device can rotate, and the wire rope pulley group above cannot rotate, thereby achieving the purpose of preventing the wire rope of the bridge crane from twisting when dismantling the equipment and rotating and lifting the hoisted equipment;

[0014] Step 5: When the wire rope group is running for a long distance and the equipment shakes naturally, if the equipment deviates too much from the vertical direction, the guide rollers on the guide frame of the anti-winding device will contact the nut columns on both sides, thereby limiting the shaking of the equipment and the pulley group.

[0015] The present invention has the following beneficial effects:

[0016] The inclined support section and the installation section form an angle that matches the inclined surfaces on both sides of the nut column, and guide rollers are then installed at the ends of the inclined support sections on both sides, so that only the guide rollers of the guide frame can contact the nut column, and the guide rollers are located on the inclined surfaces of the nut columns on both sides, so that the entire anti-twisting device cannot rotate between the nut columns on both sides and can only move up and down. After the guide frames on both sides are installed on the web of the pulley group of the hook through the splint and the connecting screw, the rotation lifting of the lifting equipment can be realized under long stroke and narrow working conditions, and the bridge crane wire rope will not be entangled, and the movable pulley group and the hoisted equipment will not collide with the nut column, which solves the problem of collision between the lifting equipment and the nut column structure and the problem of wire rope entanglement caused by the shaking of the hook and the wire rope under long stroke and narrow working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the anti-strangulation device of the present invention.

[0018] Figure 2 This is a schematic diagram of the main structure of the guide frame of the present invention.

[0019] Figure 3 It is a bottom view structural diagram of the guide frame of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the anti-strangulation device of the present invention.

[0021] Figure 5 This is a schematic diagram of the anti-strangulation device of the present invention when in use.

[0022] Figure 6This is a schematic diagram of the position of the anti-strangulation device of the present invention installed on the bridge crane hook.

[0023] Figure 7 This is a schematic diagram of the lifting equipment structure.

[0024] In the figure: guide frame 10, mounting section 11, oblique support section 12, wheel seat 13, core shaft 14, roller 15, mounting hole 16;

[0025] Connecting screw 20, double-ended screw 21, nut 22;

[0026] Clamp 30 , hook 40 , connecting web 41 , nut column 50 , lifting equipment 60 , lifting eye 70 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] Example 1:

[0029] See also Figure 1-7 , a long-stroke narrow-working condition bridge crane wire rope anti-twisting device, which includes a guide frame 10, a connecting screw 20 and a splint 30. The guide frame 10 includes a mounting section 11 in the middle and oblique support sections 12 respectively located at both ends of the mounting section 11. The oblique support section 12 and the mounting section 11 form an angle adapted to the inclined surfaces on both sides of the nut column 50. Guide rollers are installed at the ends of the oblique support sections 12 on both sides. The guide frame 10 is provided with two, and the two guide frames 10 are arranged in a state where the guide rollers are away from each other. Two connecting screws 20 are installed on the mounting section 11 of the guide frame 10, and two splints 30 are installed on the connecting screw 20 located between the guide frames 10 on both sides. The inclined support section 12 and the installation section 11 form an angle that matches the inclined surfaces on both sides of the nut column 50, and then guide rollers are installed at the ends of the inclined support sections 12 on both sides, so that only the guide rollers of the guide frame 10 can contact the nut column 50, and the guide rollers are located on the inclined surfaces of the nut columns 50 on both sides, so that the entire anti-twisting device cannot rotate between the nut columns 50 on both sides and can only move up and down. After the guide frames 10 on both sides are installed on the pulley group of the hook through the splint 30 and the connecting screw 20, the lifting equipment can be rotated and lifted under long stroke and narrow working conditions, and the bridge crane wire rope will not be entangled, and the movable pulley group and the lifted equipment will not collide with the nut column.

[0030] For details, see Figure 2 、 3 The guide roller includes a wheel seat 13, a core shaft 14, and a roller 15. The roller 15 is mounted on the wheel seat 13 through the core shaft 14. The wheel seat is fixedly connected to the oblique support section, and the structure is simple. The roller 15 can be made of carbon steel, stainless steel or strong plastic.

[0031] See also Figure 2The mounting section 11 of the guide frame 10 is provided with two mounting holes 16 for mounting the connecting screw 20 along the length direction, so as to facilitate the installation of the connecting screw 20 .

[0032] For details, see Figure 1 The connecting screw 20 is a double-ended screw rod 21 , and two nuts 22 are respectively installed on the threads at both ends of the double-ended screw rod 21 .

[0033] The clamping plate 30 has holes at both ends corresponding to the mounting holes 16 of the guide frame 10. The connecting screw 20 passes through the holes in the clamping plate 30 and then into the mounting holes 16. The two nuts 22 on each end of the connecting screw 20 are respectively located on the outside of the guide frame 10 and the inside of the clamping plate 30. The nuts 22 on both sides lock the guide frame 10 and the clamping plate 30.

[0034] The guide frame 10 is welded by angle steels and is easy to manufacture.

[0035] Example 2:

[0036] A method for rotating, lifting and hoisting using the long-stroke, narrow-working-condition bridge crane wire rope anti-twisting device comprises the following steps:

[0037] Step 1: Assemble the guide frame 10; wherein, the spacing between the guide rollers at both ends of a single guide frame 10 is adapted to the inclined surfaces on both sides of the nut column 50, and the angle between the inclined support section 12 and the mounting section 11 is adapted to the angle of the inclined surface on the nut column 50. When the guide frame 10 moves up and down, the guide rollers can be supported on the inclined surface of the nut column 50.

[0038] Step 2: Fix the wire rope pulley group of the bridge crane; lift the movable pulley group and hook 40 of the bridge crane to a suitable position and height, connect the two guide frames 10 through the double-headed screw 21 and the nut 22, use the guide frame 10 and the splint 30 to clamp the connecting web 41 of the wire rope pulley group above the rotating part of the hook 40, and tighten the nut 22 to clamp the guide frame 10 and the splint 30 to connect the connecting web 41.

[0039] Step 3: Install the lifting lug 70 on the hoisted equipment 60, and use the bridge crane to lift the wire rope pulley assembly, hook 40 and anti-twisting device to the position above the nut column 50. The hook 40 is connected to the lifting lug 70 through a sling.

[0040] Step 4: Rotation and lifting; the outer ring of the hoisted equipment has a spiral thread, and the nut column 50 has the same spiral groove. The hoisted equipment rotates up or down along the spiral line in the nut columns 50 on both sides; rotate the hoisted equipment to make it rotate around the axis, and at the same time start the bridge crane to retract / lower the wire rope, thereby slowly raising or lowering the hook. By moving in the vertical direction and rotating in the circumferential direction, rotation and lifting are achieved, so that the hoisted workpiece is lifted and lowered along the spiral line. Since the guide frame 10 of the anti-twisting device is stuck on both sides of the nut column 50, and the guide frame 10 fixes the connecting web 41 of the bridge crane wire rope pulley group, only the hook 40 below the anti-twisting device can rotate, and the wire rope pulley group above cannot rotate, thereby achieving the anti-twisting of the bridge crane wire rope and the rotation and lifting of the hoisted equipment when dismantling the equipment.

[0041] Step 5: When the wire rope group runs for a long distance and the equipment shakes naturally, when the equipment deviates too much from the vertical direction, the guide rollers 15 on the guide frame 10 of the anti-winding device come into contact with the nut columns 50 on both sides, thereby limiting the shaking of the equipment and the pulley group.

[0042] The wire rope pulley block is fixed by an anti-collision device, allowing only the hook to rotate with the hoisted equipment. By rotating the hoisting equipment and the bridge crane rising at the same time, safe and stable lifting of the object can be achieved.

Claims

1. A long-stroke narrow-working bridge crane wire rope anti-twisting device, characterized in that: It includes a guide frame (10), a connecting screw (20) and a clamp (30), wherein the guide frame (10) includes a mounting section (11) in the middle and oblique support sections (12) located at both ends of the mounting section (11), the oblique support section (12) and the mounting section (11) form an angle adapted to the oblique surfaces on both sides of the nut column (50), and guide rollers are installed at the ends of the oblique support sections (12) on both sides. The guide frame (10) is provided with two, and the two guide frames (10) are arranged in a state where the guide rollers are away from each other. The two connecting screws (20) are installed on the mounting section (11) of the guide frame (10), and the connecting screw (20) located between the guide frames (10) on both sides is provided with two connecting screws (20). Two of the clamping plates (30) are installed; the mounting section (11) of the guide frame (10) is provided with two mounting holes (16) for mounting the connecting screw (20) along the length direction; the connecting screw (20) is a double-headed screw (21), and two nuts (22) are respectively installed on the threads at both ends of the double-headed screw (21); the two ends of the clamping plate (30) are respectively provided with holes corresponding to the mounting holes (16) of the guide frame (10), and the connecting screw (20) passes through the hole of the clamping plate (30) and then passes through the mounting hole (16), and the two nuts (22) at each end of the connecting screw (20) are respectively located on the outer side of the guide frame (10) and the inner side of the clamping plate (30); The guide roller comprises a wheel seat (13), a core shaft (14), and a roller (15), wherein the roller (15) is mounted on the wheel seat (13) via the core shaft (14), and the wheel seat (13) is fixedly connected to the oblique support section (12); The guide frame (10) is formed by welding angle steel.

2. A method for rotating, lifting and hoisting using the long-stroke, narrow-working-condition bridge crane wire rope anti-twisting device according to claim 1, characterized in that: The following steps are involved: Step 1: Assemble the guide frame (10); wherein the spacing between the guide rollers at both ends of a single guide frame (10) is adapted to the inclined surfaces on both sides of the nut column (50), and the angle between the inclined support section (12) and the mounting section (11) is adapted to the angle of the inclined surface on the nut column (50), so that the guide rollers can be supported on the inclined surface of the nut column (50) when the guide frame (10) moves up and down; Step 2: Fix the wire rope pulley assembly of the bridge crane; lift the movable pulley assembly and the hook (40) of the bridge crane to a suitable position and height, connect the two guide frames (10) through the double-headed screw (21) and the nut (22), use the guide frame (10) and the clamping plate (30) to clamp the connecting web (41) of the wire rope pulley assembly above the rotating part of the hook (40), and tighten the nut (22) to clamp the connecting web (41) of the guide frame (10) and the clamping plate (30); Step 3: Install the lifting lug (70) on the hoisted equipment (60), and hoist the wire rope pulley assembly, the hook (40) and the anti-twisting device to a position above the nut column (50) through the bridge crane, and connect the hook (40) to the lifting lug (70) through a sling; Step 4: Rotation and lifting; the outer ring of the hoisted equipment has a spiral thread, and the nut column (50) has the same spiral groove, and the hoisted equipment rotates up or down along the spiral line in the nut columns (50) on both sides; the hoisted equipment (60) is rotated to rotate around the axis, and the bridge crane is started to retract or lower the wire rope, thereby slowly raising or lowering the hook, and the rotation and lifting are achieved through vertical movement and circumferential rotation, so that the hoisted workpiece is lifted and lowered along the spiral line; wherein, since the guide frame (10) of the anti-twisting device is stuck on both sides of the nut column (50), and the guide frame (10) fixes the connecting web (41) of the bridge crane wire rope pulley group, only the hook (40) below the anti-twisting device can rotate, and the wire rope pulley group above cannot rotate, thereby achieving the anti-twisting of the bridge crane wire rope and the rotation and lifting of the hoisted equipment (60) when disassembling the equipment; Step 5: When the wire rope group is running for a long distance and the equipment naturally shakes, if the equipment deviates too much from the vertical direction, the guide roller (15) on the anti-winding device guide frame (10) contacts the nut columns (50) on both sides, thereby limiting the shaking of the equipment and the pulley group.

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