Unreeling device for bridge crane

Abstract

The utility model discloses an unwinding device for a bridge crane, which comprises a trolley frame, a first motor is arranged at the top of the trolley frame, an output shaft of the first motor is in transmission connection with a first speed reducer, an output end of the first speed reducer is connected with a first winding drum, and the other end of the first winding drum is rotatably connected with the trolley frame. A clamp is hung on the surface of the electric rotary lifting hook, a cross cursor projection is arranged on the surface of the clamp, and after the cross cursor projection emitted from the surface of the clamp at the bottom of the lifting hook is observed to be aligned with X-axis and Y-axis coordinates of the saddle, the next operation can be carried out, so that the first winding drum and the second winding drum rotate and unwind; the electric rotary lifting hook and the clamp are driven to place a lifted steel coil at the position of the aligned saddle, and accurate coil feeding can be realized after alignment by observing whether a cross cursor projection ejected from the surface of the clamp is aligned with X-axis and Y-axis coordinates of the saddle or not, so that commands of ground personnel are reduced, the working efficiency is improved, and the safety risk that the personnel enter a production line is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge cranes, and in particular relates to an unwinding device for bridge cranes. Background Art

[0002] A bridge crane is a type of lifting equipment commonly used in industry and construction sites. It is installed on a support with a cantilever (big arm) across the top. It can move horizontally and rise and fall vertically within a certain range. It is used to lift and carry various heavy objects. A bridge crane is usually composed of a main beam, motor, transmission mechanism, control system, counterweight and other components. It has the characteristics of simple structure, stable operation, high efficiency, etc., and is suitable for various lifting operations.

[0003] Currently, the hoisting coil of a bridge crane is directed and operated by ground rope operators in the form of pointing and lifting. However, there are operational safety risks in this way. When directing and operating, ground rope operators need to enter the production line to direct and lift. The personnel do not pay attention to their standing position, resulting in being too close to the hoisted object. As a result, due to the standing position problem, the ground rope operators can only point and lift from a safe distance of 3 meters from the hoisting object, resulting in manual visual judgment of whether the steel coil is placed in the center of the saddle. There is a serious accuracy deviation, which causes the risk of the steel coil falling over, and easily leads to frequent safety accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a reeling device for a bridge crane to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an unwinding device for a bridge crane, comprising:

[0006] A trolley frame, a first motor is provided on the top of the trolley frame, an output shaft of the first motor is transmission-connected to the first reducer, an output end of the first reducer is connected to a first drum and the other end of the first drum is rotationally connected to the trolley frame, one side of the first drum is rotationally connected to a second drum, a second motor is provided on the surface of the trolley frame and the output shaft of the second motor is transmission-connected to the second reducer, the output shaft of the second reducer is connected to the second drum, steel wire ropes are wound around the surfaces of the first drum and the other end of the steel wire ropes is connected to an electric rotating hook, a clamp for clamping the steel coil is hoisted on the surface of the electric rotating hook, a cross cursor projection is provided on the surface of the clamp, and the cross cursor projection is aligned with the saddle axis coordinates of the steel coil placement area so that the steel coil can be accurately hoisted to the saddle position.

[0007] Preferably, a plurality of wheels are drivingly connected to the bottom of the trolley frame, and each two sets of wheels are connected by a rotating shaft. A third motor is provided on the surface of the trolley frame. The output shaft of the third motor is drivingly connected to a third speed reducer, and the output end of the third speed reducer is connected to one of the rotating shafts.

[0008] Preferably, a brake is provided on the surface of the trolley frame and is connected to the wheels. An external cold air machine is provided on the surface of the trolley frame.

[0009] Preferably, a trolley railing is provided on the top surface of the trolley frame.

[0010] Preferably, an angle sensor, a descending-in-place sensor, and an anti-collision-edge sensor are provided on the surface of the fixture.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: By adding a driver's cab touch screen for displaying the coordinates of the trolley and the hoist and the states of each fixture in the driver's cab of the bridge crane, the bridge crane starts to operate by starting the first motor and the second motor. The first motor and the second motor drive the output shafts of the first speed reducer and the second speed reducer to rotate, thereby driving the first drum and the second drum to rotate and unwind the wire ropes respectively, so that the wire ropes drive the electric rotating hook to move towards the steel coil, and the steel coil is clamped by the fixture. When the electric rotating hook hoists the steel coil for loading, after observing that the crosshair cursor projection emitted from the surface of the fixture at the bottom of the hook is aligned with the X and Y axis coordinates of the saddle, the next operation can be carried out. The first drum and the second drum rotate and unwind the wire ropes, driving the electric rotating hook and the fixture to place the hoisted steel coil at the position of the aligned saddle, thus completing the loading. By observing whether the crosshair cursor projection emitted from the surface of the fixture is aligned with the X and Y axis coordinates of the saddle, accurate loading can be achieved after alignment, thereby reducing the command of ground personnel, improving the operation efficiency, and reducing the safety risks of personnel entering the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is a top view of the present utility model;

[0014] Figure 3 is a schematic structural diagram of the present utility model;

[0015] Figure 4 is a working principle diagram of the present utility model.

[0016] In the figure: 1. Trolley frame; 2. First speed reducer; 3. First motor; 4. First drum; 5. Second drum; 6. Second motor; 7. Steel wire rope; 8. Electric rotating hook; 9. Fixture; 10. Crosshair projection; 11. Second speed reducer; 12. Wheels; 13. Rotating shaft; 14. Third motor; 15. Third speed reducer; 16. Brake; 17. External cold air machine; 18. Trolley railing; 19. Angle sensor; 20. Sensor for reaching the lower limit; 21. Anti-collision edge sensor; 22. First encoder; 23. Second encoder; 24. First PLC; 25. Driver's cab touch screen; 26. Second PLC. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] The present invention provides a pay-off device for a bridge crane as shown in Figures 1-4 and includes:

[0019] A trolley frame 1, on the top of which is provided a first motor 3. The output shaft of the first motor 3 is in transmission connection with a first speed reducer 2. The output end of the first speed reducer 2 is connected to a first drum 4, and the other end of the first drum 4 is rotatably connected to the trolley frame 1. A second drum 5 is rotatably connected to one side of the first drum 4. A second motor 6 is provided on the surface of the trolley frame 1, and the output shaft of the second motor 6 is in transmission connection with a second speed reducer 11. The output shaft of the second speed reducer 11 is connected to the second drum 5. Steel wire ropes 7 are wound on the surfaces of both the first drum 4 and the second drum 5, and the other ends of the steel wire ropes 7 are connected to an electric rotating hook 8. A fixture 9 for clamping a steel coil is suspended on the surface of the electric rotating hook 8. A crosshair projection 10 is provided on the surface of the fixture 9. By aligning the crosshair projection 10 with the saddle axis coordinates of the steel coil placement area, the steel coil can be accurately hoisted to the saddle position.

[0020] A number of wheels 12 are drivingly connected to the bottom of the trolley frame 1, and a rotating shaft 13 is connected between every two sets of wheels 12. A third motor 14 is provided on the surface of the trolley frame 1. The output shaft of the third motor 14 is drivingly connected to a third speed reducer 15, and the output end of the third speed reducer 15 is connected to one set of the rotating shafts 13. The third motor 14 serves as a power source and transmits power to the third speed reducer 15 through its output shaft. The third speed reducer 15 converts the high-speed and low-torque output of the third motor 14 into a low-speed and high-torque output to meet the rotation requirements of the wheels 12. Since the wheels 12 are connected by the rotating shaft 13, when the third speed reducer 15 drives the rotating shaft 13 to rotate, it can drive the wheels 12 to rotate synchronously, thereby realizing the movement of the trolley frame 1.

[0021] A brake 16 is provided on the surface of the trolley frame 1, and the brake 16 is connected to the wheels 12. A cold air external unit 17 is provided on the surface of the trolley frame 1 to provide cooling or ventilation effects for the equipment.

[0022] A trolley railing 18 is provided on the top surface of the trolley frame 1, which can prevent the operator from accidentally falling and increase safety.

[0023] An angle sensor 19, a descending-in-place sensor 20, and an anti-collision-edge sensor 21 are provided on the surface of the fixture 9. The angle sensor 19 is used to detect the angle change of the fixture 9. By measuring the angle change of the fixture 9, the fixture 9 can be aligned with the steel coil, facilitating the hoisting of the steel coil onto the reel;

[0024] For the descending-in-place sensor 20, when the electric rotating hook 8 descends the steel coil to the saddle position and the fixture 9 is not in contact with the steel coil, the descending-in-place sensor 20 sends a signal to the second encoder 23. After being processed by the second encoder 23, the signal is transmitted to the first PLC 24, and the first PLC 24 sends a signal to control the descending-in-place indicator light to turn on;

[0025] The anti-collision-edge sensor 21 is used to detect whether the fixture 9 hoisted by the electric rotating hook 8 approaches or contacts an obstacle to avoid collisions. When the anti-collision-edge sensor 21 detects that an object approaches an obstacle, the second encoder 23 immediately sends a signal to the first PLC 24, and the first PLC 24 will accordingly decelerate and stop the electric rotating hook 8.

[0026] The unwinding device for the overhead crane adds a driver's cab touch screen 25 in the driver's cab of the overhead crane to display the coordinates of the trolley and the crab and the status of each fixture 9. The overhead crane operates by starting the first motor 3 and the second motor 6. The first motor 3 and the second motor 6 drive the output shafts of the first reducer 2 and the second reducer 11 to rotate, thereby driving the first reel 4 and the second reel 5 to rotate and unwind respectively. The steel wire rope 7 drives the electric rotating hook 8 to move towards the steel coil, and the steel coil is clamped by the fixture 9. When the electric rotating hook 8 hoists the steel coil for loading, after observing that the crosshair cursor projection 10 emitted from the surface of the fixture 9 at the bottom of the hook is aligned with the X and Y axis coordinates of the saddle, the next operation can be carried out. The first reel 4 and the second reel 5 rotate and unwind, driving the electric rotating hook 8 and the fixture 9 to place the hoisted steel coil at the position of the saddle after alignment, thus completing the loading. By observing whether the crosshair cursor projection 10 emitted from the surface of the fixture 9 is aligned with the X and Y axis coordinates of the saddle, accurate loading can be achieved after alignment, thereby reducing the command of ground personnel, improving the operation efficiency, and reducing the safety risk of personnel entering the production line.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A reeling device for a bridge crane, characterized in that: include: A trolley frame (1), wherein a first motor (3) is provided on the top of the trolley frame (1), an output shaft of the first motor (3) is transmission-connected to a first reducer (2), an output end of the first reducer (2) is connected to a first reel (4), and the other end of the first reel (4) is rotationally connected to the trolley frame (1), one side of the first reel (4) is rotationally connected to a second reel (5), a second motor (6) is provided on the surface of the trolley frame (1), and an output shaft of the second motor (6) is transmission-connected to a second reducer (11), The output shaft of the second reducer (11) is connected to the second reel (5); the surfaces of the first reel (4) and the second reel (5) are both wound with steel wire ropes (7), and the other ends of the steel wire ropes (7) are connected to electric rotating hooks (8); the surface of the electric rotating hook (8) is hoisted with a clamp (9) for clamping the steel coil; the surface of the clamp (9) is provided with a cross cursor projection (10); the cross cursor projection (10) is aligned with the saddle axis coordinates of the steel coil placement area, so that the steel coil can be accurately hoisted to the saddle position.

2. The unwinding device for a bridge crane according to claim 1, characterized in that: The bottom of the trolley frame (1) is transmission-connected to a plurality of wheels (12), and each two groups of wheels (12) are connected via a rotating shaft (13). A third motor (14) is provided on the surface of the trolley frame (1). The output shaft of the third motor (14) is transmission-connected to a third reducer (15), and the output end of the third reducer (15) is connected to one of the groups of rotating shafts (13).

3. The unwinding device for a bridge crane according to claim 2, characterized in that: The surface of the trolley frame (1) is provided with a brake (16) and the brake (16) is connected to the wheel (12); the surface of the trolley frame (1) is provided with an external cold air machine (17).

4. The unwinding device for a bridge crane according to claim 1, characterized in that: The top surface of the trolley frame (1) is provided with a trolley railing (18).

5. The unwinding device for a bridge crane according to claim 1, characterized in that: The surface of the clamp (9) is provided with an angle sensor (19), a descending sensor (20), and an anti-edge collision sensor (21).

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