A multi-purpose hook set with redundant structure for nuclear power

Abstract

The utility model relates to the technical field of hoist, concretely relates to a multipurpose hook group of redundancy structure for nuclear power, including two first hanger plates, and the first hanger plate between fixedly connected with pulley axle, and the pulley axle is rotatably connected with two groups of first pulley group and second pulley group, and the first hanger plate is rotatably connected with the hook crossbeam between two, and the hook crossbeam is connected with the mounting bracket, and the two sides fixed connection of mounting bracket have guide cylinder, and one guide cylinder in sliding connection has pin shaft, and the guide cylinder is installed with telescopic mechanism, and the mounting bracket is hinged with hook body through pin shaft, the utility model discloses two independent steel wire ropes are connected with the redundancy structure of first pulley group and second pulley group respectively, when one steel wire rope breaks accidentally, another steel wire rope can still maintain hoisting operation, and the safety under the high risk scene such as nuclear power is ensured, in addition, the movement of pin shaft is controlled through telescopic mechanism, so as to be convenient for the quick replacement of hook body, thereby can satisfy different hoisting form demand.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a multi-purpose hook assembly with redundant structure for nuclear power plants. Background Technology

[0002] In the nuclear power field, hoisting operations have extremely high requirements for safety and reliability. However, traditional hook assemblies use a single steel wire rope for traction, which can cause major accidents if it breaks. In addition, traditional hook assemblies are fixed by bolts or welding, and replacing the hook body requires disassembling a large number of parts, which is time-consuming and labor-intensive. They cannot meet the needs of frequent switching of hoisting methods in nuclear power scenarios. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0003] This invention provides a multi-purpose hook assembly with a redundant structure for nuclear power plants to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a multi-purpose hook assembly with redundant structure for nuclear power plants, comprising two opposing first hanging plates, a pulley shaft fixedly connected between the tops of the two first hanging plates, two symmetrically arranged first pulley groups rotatably connected to the pulley shaft, and two symmetrically arranged second pulley groups located outside the first pulley groups rotatably connected to the pulley shaft; a hook beam rotatably connected between the bottoms of the two first hanging plates, an inverted U-shaped mounting bracket connected to the hook beam, symmetrically arranged guide cylinders fixedly connected to both sides of the bottom of the mounting bracket, a guide hole communicating with the guide cylinder on the side wall of the mounting bracket, a pin slidably connected inside one of the guide cylinders, a telescopic mechanism for controlling the extension and retraction of the pin is installed on the guide cylinder, and a hook body is hinged to the mounting bracket via the pin.

[0005] Preferably, the inner wall of the guide cylinder is provided with a groove along the axial direction, and a slider that cooperates with the groove is fixedly connected to the outer wall of the pin. The telescopic mechanism includes a screw threaded in the pin, and the end of the screw away from the mounting bracket extends to the outside of the guide cylinder and is rotatably connected to the guide cylinder. A first motor is mounted on the guide cylinder through a motor bracket, and the output end of the first motor is connected to the screw through a transmission assembly.

[0006] Preferably, the end of the pin near the mounting bracket is provided with a tapered guide.

[0007] Preferably, a rotating mechanism is provided between the hook beam and the mounting frame. The rotating mechanism includes a vertically arranged rotating shaft. The top end of the rotating shaft passes through the hook beam and is threaded with a hook nut. The rotating shaft and the hook beam are rotatably connected by a bearing. A first gear is coaxially fixed on the rotating shaft. A mounting plate is fixedly connected to the bottom surface of the hook beam. A second motor is mounted on the mounting plate. A second gear that meshes with the first gear is driven on the output shaft of the second motor.

[0008] Preferably, there are two second motors, which are symmetrically arranged on both sides of the rotating shaft.

[0009] Preferably, a torque limiter is installed between the second motor and the second gear.

[0010] The beneficial effects of this utility model are as follows: (1) This utility model adopts a redundant structure with two independent steel wire ropes connecting the first pulley group and the second pulley group respectively. When one of the steel wire ropes breaks accidentally, the other steel wire rope can still maintain the hoisting operation, ensuring safety in high-risk scenarios such as nuclear power. In addition, the movement of the pin shaft is controlled by the telescopic mechanism, combined with the design of the guide cylinder and the guide hole, so as to facilitate the quick replacement of the hook body, thereby meeting the needs of different hoisting forms and improving the flexibility of operation; (2) Through the design of the tapered guide part at the end of the pin shaft, the pin shaft can be guided to accurately insert into the guide hole and the guide cylinder, reducing the difficulty of alignment and improving the efficiency of disassembly and assembly; (3) The rotating mechanism is driven symmetrically by two second motors to realize the controllable rotation of the hook and the cargo, meeting the needs of complex hoisting; the dual motor layout ensures that the gear is evenly stressed, while balancing the counterweights on both sides and enhancing stability; (4) By setting a torque limiter between the second motor and the second gear, the second motor can be protected when the load exceeds the limit and slippage occurs, thereby improving the durability of the system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a side view of the structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the telescopic mechanism of this utility model;

[0014] Figure 4 This is a side view of the telescopic mechanism of this utility model.

[0015] Reference numerals: 1. First hanging plate; 2. Pulley shaft; 3. First pulley block; 4. Second pulley block; 5. Hook beam; 6. Rotating mechanism; 61. Rotating shaft; 62. Hook nut; 63. First gear; 64. Mounting plate; 65. Second motor; 66. Second gear; 67. Torque limiter; 7. Mounting bracket; 8. Guide cylinder; 9. Guide hole; 10. Pin; 11. Telescopic mechanism; 111. Screw; 112. First motor; 113. Transmission assembly; 12. Hook body; 13. Conical guide section. Detailed Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] like Figure 1-4As shown, this utility model provides a multi-purpose hook assembly with redundant structure for nuclear power plants, including two opposing first lifting plates 1. A pulley shaft 2 is fixedly connected between the tops of the two first lifting plates 1. Two sets of symmetrically arranged first pulley groups 3 are rotatably connected to the pulley shaft 2. Two sets of symmetrically arranged second pulley groups 4 located outside the first pulley groups 3 are rotatably connected to the pulley shaft 2. A hook beam 5 is rotatably connected between the bottoms of the two first lifting plates 1. An inverted U-shaped mounting frame 7 is connected to the hook beam 5. Two symmetrically arranged guide cylinders 8 are fixedly connected to the bottom sides of the mounting frame 7. A guide hole 9 communicating with the guide cylinder 8 is opened on the side wall of the mounting frame 7. A pin 10 is slidably connected inside one of the guide cylinders 8. A telescopic mechanism 11 for controlling the extension and retraction of the pin 10 is installed on the guide cylinder 8. A hook body 12 is hinged to the mounting frame 7 through the pin 10.

[0018] Specifically, during use, the crane is connected to the first pulley block 3 and the second pulley block 4 via two independent steel wire ropes. If one of the steel wire ropes breaks accidentally, the other can still maintain the lifting operation, ensuring safety in high-risk scenarios such as nuclear power plants. In addition, when it is necessary to replace the hook body 12, the telescopic mechanism 11 is activated. The telescopic mechanism 11 drives the pin shaft 10 to exit the guide hole 9 to the right. After the pin shaft 10 is completely withdrawn, the hook body 12 can be removed from the bottom of the mounting frame 7. Then, the hinge hole of the new hook body 12 is aligned with the guide hole 9, and the telescopic mechanism 11 drives the pin shaft 10 to insert into the guide hole 9 and the guide cylinder 8, so as to facilitate the quick replacement of the hook body 12, thereby meeting the needs of different lifting methods and improving operational flexibility.

[0019] In some embodiments, the inner wall of the guide cylinder 8 is provided with a groove along the axial direction, and a slider that cooperates with the groove is fixedly connected to the outer wall of the pin 10. The groove and slider are not shown in the figure. The telescopic mechanism 11 includes a screw 111 threadedly connected to the pin 10. One end of the screw 111 away from the mounting bracket 7 extends to the outside of the guide cylinder 8 and is rotatably connected to the guide cylinder 8. A first motor 112 is mounted on the guide cylinder 8 through a motor bracket. The output end of the first motor 112 is connected to the screw 111 through a transmission assembly 113. The transmission assembly 113 can be a sprocket transmission mechanism or a gear transmission mechanism. Specifically, in use, the first motor 112 is controlled to rotate in both directions. The first motor 112 can drive the screw 111 to rotate through the transmission mechanism. Since the pin 10 is restricted from circumferential rotation by the groove and the slider, the screw 111 can drive the pin 10 to extend or retract.

[0020] In some embodiments, a tapered guide portion 13 is provided at one end of the pin 10 near the mounting bracket 7. The tapered guide portion 13 plays a guiding role, which can guide the pin 10 to be accurately inserted into the guide hole 9 and the guide cylinder 8, reducing the difficulty of alignment and improving the efficiency of disassembly and assembly.

[0021] In some embodiments, a rotating mechanism 6 is provided between the hook beam 5 and the mounting frame 7. The rotating mechanism 6 includes a vertically arranged rotating shaft 61. The top end of the rotating shaft 61 passes through the hook beam 5 and is threadedly connected to a hook nut 62. The rotating shaft 61 and the hook beam 5 are rotatably connected via bearings. A first gear 63 is coaxially fixed on the rotating shaft 61. A mounting plate 64 is fixedly connected to the bottom surface of the hook beam 5. A second motor 65 is mounted on the mounting plate 64. A second gear 66, which meshes with the first gear 63, is driven to the output shaft of the second motor 65. Specifically, in use, when the cargo needs to be rotated, the second motor 65 is started. The second motor 65 drives the rotating shaft 61 to rotate via the second gear 66 and the first gear 63. In this way, the rotating shaft 61 can drive the hook and cargo to rotate, meeting complex lifting requirements.

[0022] In some embodiments, there are two second motors 65, which are symmetrically arranged on both sides of the rotating shaft 61. The two second motors 65 drive the first gear 63 to rotate, which can ensure that the first gear 63 is subjected to uniform force. At the same time, the two second motors 65 are located on both sides of the hook assembly, which can ensure that the weight distribution on both sides of the hook assembly is uniform and enhance stability.

[0023] In some embodiments, a torque limiter 67 is installed between the second motor 65 and the second gear 66. In this embodiment, the torque limiter 67 is a friction torque limiter 67. The torque limiter 67 slips when the load exceeds the limit, thereby protecting the second motor 65 and improving the system durability.

[0024] The above embodiments can be combined with each other.

[0025] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A multi-purpose lifting hook assembly with redundant structure for nuclear power plants, comprising two opposing first lifting plates, characterized in that: A pulley shaft is fixedly connected between the tops of the two first hanging plates. Two sets of symmetrically arranged first pulleys are rotatably connected to the pulley shaft. Two sets of symmetrically arranged second pulleys located outside the first pulleys are rotatably connected to the pulley shaft. A hook beam is rotatably connected between the bottoms of the two first hanging plates. An inverted U-shaped mounting bracket is connected to the hook beam. Symmetrically arranged guide cylinders are fixedly connected to both sides of the bottom of the mounting bracket. A guide hole communicating with the guide cylinder is opened on the side wall of the mounting bracket. A pin is slidably connected inside one of the guide cylinders. A telescopic mechanism for controlling the extension and retraction of the pin is installed on the guide cylinder. The hook body is hinged to the mounting bracket through the pin.

2. The multi-purpose hook assembly with redundant structure for nuclear power plants according to claim 1, characterized in that: The inner wall of the guide cylinder is provided with a sliding groove along the axial direction, and a slider that cooperates with the sliding groove is fixedly connected to the outer wall of the pin. The telescopic mechanism includes a screw threadedly connected to the pin. The end of the screw away from the mounting bracket extends to the outside of the guide cylinder and is rotatably connected to the guide cylinder. A first motor is mounted on the guide cylinder through a motor bracket, and the output end of the first motor is connected to the screw through a transmission assembly.

3. A multi-purpose hook assembly with redundant structure for nuclear power plants according to claim 1, characterized in that: The pin has a tapered guide at one end near the mounting bracket.

4. A multi-purpose hook assembly with redundant structure for nuclear power plants according to claim 1, characterized in that: A rotating mechanism is provided between the hook beam and the mounting frame. The rotating mechanism includes a vertically arranged rotating shaft. The top end of the rotating shaft passes through the hook beam and is threaded with a hook nut. The rotating shaft and the hook beam are rotatably connected by a bearing. A first gear is coaxially fixed on the rotating shaft. A mounting plate is fixedly connected to the bottom surface of the hook beam. A second motor is mounted on the mounting plate. A second gear that meshes with the first gear is driven on the output shaft of the second motor.

5. A multi-purpose hook assembly with redundant structure for nuclear power plants according to claim 4, characterized in that: There are two second motors, which are symmetrically arranged on both sides of the rotating shaft.

6. A multi-purpose hook assembly with redundant structure for nuclear power plants according to claim 4, characterized in that: A torque limiter is installed between the second motor and the second gear.

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