A power-free shielding lifting device

Abstract

The present invention discloses a power-free shielding lifting device, which includes a hook, a shielding cylinder, an outer lining of the shielding cylinder, an inner lining of the shielding cylinder, a driving device and a trimming weight. Telescopic guide bars are installed on the inner wall of the inner lining of the shielding cylinder, and guide wheels are installed on the telescopic guide bars. A telescopic arm is installed in the cavity. A guide groove is provided on the telescopic arm, and the guide groove is installed on the telescopic guide bar. A lifting head is installed at the lower end of the telescopic arm. During the entire grasping and unloading process, the goods will not rotate or shake, ensuring the smoothness, safety and reliability of the lifting process. There are rabbet positions at each connection to ensure the coaxiality between each connection and avoid deviations during re-assembly.

Description

Technical Field

[0001] The present invention relates to a hoisting device, and more particularly to a non-powered shielding hoisting device. Background Art

[0002] When dealing with radioactive materials or nuclear waste, the radiation source needs to be loaded into a packaging container, and then the packaging container is hoisted. Such packaging containers mostly have an inwardly protruding annular hoisting ring. Due to the special working environment, it is not suitable for personnel to participate in on-site hoisting work during the hoisting process. Only remote control devices can be used to avoid radioactive waste from causing harm to personnel. At the same time, it is required to avoid equipment failures as much as possible during the operation process, increase the service life of the equipment, and reduce maintenance and repair.

[0003] Most of the existing hoisting equipment requires external power to grasp the hoisting ring. The defects of such equipment are as follows: External power supply is required to provide power for it. Inevitably, a cable needs to be connected between the lifting tool and the power supply box. Whether it is a motor failure or a cable failure, the entire hoisting work will be affected, and the energy consumption is also huge. In addition, there are also automatic lifting tools that do not require external power in the prior art, but this new type of lifting tool is applicable to hoisting rings that protrude outward and cannot be applied to the characteristics of the inwardly protruding hoisting ring of the waste packaging container. Inventing a hoisting device that is applicable to the characteristics of the inwardly protruding hoisting ring of the packaging container and does not rely on external force has become a problem to be solved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above deficiencies and provide a non-powered shielding hoisting device.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A power-free shielding hoisting device includes a hook, a shielding cylinder, a telescopic arm, a driving device, and a hoisting head. There is a first cavity between the hook and the shielding cylinder. Multiple movable pulleys in a straight line are installed in the first cavity. The shielding cylinder is provided at the lower end of the first cavity. A through hole is provided at the center position of the upper end of the shielding cylinder. The outer surface of the shielding cylinder is lined with an outer lining of the shielding cylinder, and a control console is installed on the outer lining of the shielding cylinder. The driving device is installed on the control console. The inner surface of the shielding cylinder is lined with an inner lining of the shielding cylinder, and multiple symmetric telescopic guide bars are installed on the inner lining of the shielding cylinder. Guide wheels are installed on the telescopic guide bars. The telescopic arm is installed in the cavity. The upper end of the telescopic arm is connected to a steel wire rope. The other end of the steel wire rope passes through the through hole and then passes through the movable pulley to be connected to the driving device. Multiple guide grooves are provided on the telescopic arm, and each guide groove is slidably connected to the telescopic guide bar. The lower end of the telescopic arm is equipped with a hoisting head. The hoisting head includes a lifting cover. The lower end of the lifting cover is connected to an outer sleeve of the hoisting head. Multiple up-and-down movement guide grooves are provided on the outer sleeve of the hoisting head. A rotary sleeve is installed inside the outer sleeve of the hoisting head. Multiple rotation limiting grooves are provided on the rotary sleeve. A sliding rod is provided in each rotation limiting groove. One end of the sliding rod is fixed to the outer sleeve of the hoisting head, and the other end is slidably connected to the rotation limiting groove. An up-and-down movement guide sleeve is installed inside the rotary sleeve. Multiple load-bearing rods are installed on the up-and-down movement guide sleeve. One end of the load-bearing rod is connected to the up-and-down movement guide sleeve, and the other end is slidably connected to the up-and-down movement guide groove. A third rolling bearing is installed at the lower end of the up-and-down movement guide sleeve. The third rolling bearing is sleeved on a non-return shaft. A retaining ring is installed at the lower end of the third rolling bearing. Uniformly distributed grooves and protrusions are provided inside the retaining ring, and the grooves and protrusions are arranged at intervals. A ratchet is sleeved on the upper end of the retaining ring. A ratchet pawl is installed beside the ratchet. The ratchet pawl is connected to the rotary sleeve through a pull rod. A second rolling bearing is installed between the retaining ring and the non-return shaft. Multiple through holes are provided on the non-return shaft at the same horizontal plane. Push rods are installed in each through hole. A return spring is installed on the push rod. One end of the push rod contacts the groove or protrusion inside the retaining ring, and the other end is connected to the upper end of the claw through a first pin shaft. A through hole is provided on the claw. A plum blossom seat is installed at the lower end of the non-return shaft. Multiple second pin shafts are provided inside the plum blossom seat. A first rolling bearing is installed on each second pin shaft. The first rolling bearing is in rolling connection with the through hole on the claw. A tool guide seat is installed at the lower end of the plum blossom seat. The lower end of the claw is placed inside the tool guide seat.

[0007] A further improvement of the present invention lies in that a trimming weight is installed on the outer lining of the shielding cylinder.

[0008] A further improvement of the present invention lies in that the driving device is a redundant system composed of a double motor, a double reducer, and a double steel wire rope.

[0009] A further improvement of the present invention lies in that a weighing sensor is installed on the driving device.

[0010] A further improvement of the present invention lies in that there are at least two movable pulleys. One is installed at the edge position of the top end of the shielding cylinder close to the driving device, and the other is installed at the edge position of the through hole and between the driving device and the through hole.

[0011] The present invention has the following advantages compared with the prior art:

[0012] On the inner lining of the shielding cylinder of the present invention, multiple symmetric telescopic guide strips are installed. Guide wheels are installed on the telescopic guide strips, and multiple guide grooves are provided on the telescopic arm. The guide grooves are slidably connected to the telescopic guide strips, so that the packaging container will not rotate during the lifting process, ensuring the smoothness of the lifting process.

[0013] At the lower end of the plum blossom base of the present invention, a tool guide seat is installed, which can enable the device to accurately grasp the packaging container and avoid the collision between the device and the packaging container due to deviation.

[0014] On the outer lining of the shielding cylinder of the present invention, balancing blocks are installed, making the center of gravity more stable whether the device is stationary or in operation.

[0015] The driving device of the present invention is a redundant system composed of a double motor, a double reducer, and double steel wire ropes. If any one of the motor, reducer, and steel wire rope is damaged, the driving device can still normally complete a working cycle, and the accurate position of the lifting head is detected in real time. When the lifting head approaches the set limit position, the system will automatically decelerate; when the lifting head reaches the set limit position, the system will automatically stop and send an alarm signal, and only the opposite action can be taken at this time.

[0016] A weighing sensor is installed on the driving device of the present invention, with a setting accuracy of 1%. When the load exceeds 10% of the rated load, the system will send an alarm signal and cut off the hoisting power supply. At this time, the hoisting mechanism can only lower and cannot rise. If underload is detected, indicating that the steel wire rope is slack, the power supply will also be cut off at this time, greatly improving the safety and reliability during operation.

[0017] There are at least two movable pulleys in the present invention. One is installed at the edge of the top of the shielding cylinder close to the driving device, and the other is installed at the edge of the through hole and between the driving device and the through hole. The design is more reasonable, avoiding frictional damage caused by the direct contact between the steel wire rope and the edge of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall schematic diagram of the present invention;

[0019] Figure 2 is the Figure 1 cross-sectional view taken along line A-A of the present invention;

[0020] Figure 3 is the structural schematic diagram of the lifting head of the present invention;

[0021] Figure 4 is the Figure 3 cross-sectional view taken along line B-B of the present invention;

[0022] Figure 5 This is the bottom view of the lifting head of the present invention;

[0023] Reference numerals in the figure: hook - 1, lifting head - 2, telescopic guide bar - 3, movable pulley - 4, shielding cylinder - 5, outer lining of shielding cylinder - 6, inner lining of shielding cylinder - 7, cavity - 8, driving device - 9, wire rope - 10, trimming weight - 11, telescopic arm - 12, through hole - 13, first cavity - 14, control console - 15, tool guide seat - 16, ratchet - 17, ratchet pawl - 18, lifting cover - 19, outer sleeve of lifting head - 20, load - bearing rod - 21, sliding rod - 22, up - and - down movement guide sleeve - 23, check shaft - 24, push rod - 25, plum blossom seat - 26, claw - 27, collar - 28, slewing sleeve - 29, pull rod - 30, up - and - down movement guide groove - 31, third rolling bearing - 32, first rolling bearing - 33, second rolling bearing - 34, second pin shaft - 35, first pin shaft - 36, rotation limit groove - 37. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of the present invention. The elements and features described in one embodiment of the present invention can be combined with those shown in one or more other embodiments. It should be noted that, for the sake of clarity, the representation and description of components and processes that are irrelevant to the present invention and known to those of ordinary skill in the art are omitted in the description. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] The following further describes the present invention with reference to the accompanying drawings: A power - free shielding lifting device includes a hook 1, a shielding cylinder 5, a telescopic arm 12, a driving device 9 and a lifting head 2. A first cavity 14 is provided between the hook 1 and the shielding cylinder 5. A plurality of movable pulleys 4 arranged in a straight line are installed in the first cavity 14. The shielding cylinder 5 is provided at the lower end of the first cavity 14. A through hole 13 is provided at the central position of the upper end of the shielding cylinder 5. The outer surface of the shielding cylinder 5 is lined with an outer lining 6 of the shielding cylinder. A control console 15 is provided on the outer lining 6 of the shielding cylinder. The driving device 9 is installed on the control console 15. The inner surface of the shielding cylinder 5 is lined with an inner lining 7 of the shielding cylinder. A plurality of symmetric telescopic guide bars 3 are installed on the inner lining 7 of the shielding cylinder. Guide wheels are installed on the telescopic guide bars 3. The telescopic arm 12 is installed in the cavity 8. The upper end of the telescopic arm 12 is connected to the wire rope 10. The other end of the wire rope 10 passes through the through hole 13 and then passes through the movable pulley 4 to be connected to the driving device 9. A plurality of guide grooves are provided on the telescopic arm 12. Each guide groove is slidably connected to the telescopic guide bar 3, so that the packaging container will not rotate during the lifting process, ensuring the smoothness of the lifting process.

[0026] A lifting head 2 is installed at the lower end of the telescopic boom 12. The lifting head 2 includes a lifting cover 19. The lower end of the lifting cover 19 is connected to an outer sleeve 20 of the lifting head. Multiple vertical movement guiding grooves 31 are provided on the outer sleeve 20 of the lifting head. A rotating sleeve 29 is installed inside the outer sleeve 20 of the lifting head. Multiple rotation limiting grooves 37 are provided on the rotating sleeve 29. A sliding rod 22 is provided in each rotation limiting groove 37. One end of the sliding rod 22 is fixed to the outer sleeve 20 of the lifting head, and the other end is slidably connected to the rotation limiting groove 37. A vertical movement guiding sleeve 23 is installed inside the rotating sleeve 29. Multiple load-bearing rods 21 are installed on the vertical movement guiding sleeve 23. One end of the load-bearing rod 21 is connected to the vertical movement guiding sleeve 23, and the other end is slidably connected to the vertical movement guiding groove 31. A third rolling bearing 32 is installed at the lower end of the vertical movement guiding sleeve 23. The third rolling bearing 32 is sleeved on a reverse rotation shaft 24. A shift ring 28 is installed at the lower end of the third rolling bearing 32. The inside of the shift ring 28 is provided with evenly distributed grooves and protrusions, and the grooves and protrusions are arranged at intervals. A ratchet wheel 17 is sleeved on the upper end of the shift ring 28. A ratchet pawl 18 is installed beside the ratchet wheel 17. The ratchet pawl 18 is connected to the rotating sleeve 29 through a pull post 30. A second rolling bearing 34 is installed between the shift ring 28 and the reverse rotation shaft 24. Multiple through holes are provided on the reverse rotation shaft 24 at the same horizontal plane. A push rod 25 is installed in each through hole. A return spring is installed on the push rod 25. One end of the push rod 25 contacts a groove or a protrusion inside the shift ring 28, and the other end is connected to the upper end of a claw 27 through a first pin shaft 36. A through hole is provided on the claw 27. A plum blossom seat 26 is installed at the lower end of the reverse rotation shaft 24. Multiple second pin shafts 35 are provided inside the plum blossom seat 26. A first rolling bearing 33 is installed on each second pin shaft 35. The first rolling bearing 33 is in rolling connection with the through hole on the claw 27. A tool guiding seat 16 is installed at the lower end of the plum blossom seat 26. The lower end of the claw 27 is placed inside the tool guiding seat 16, which can enable the equipment to accurately grab the packaging container and avoid the collision between the equipment and the packaging container due to deviation.

[0027] A trimming weight 11 is installed on the outer lining 6 of the shielding cylinder, making the center of gravity of the equipment more stable whether it is stationary or in operation.

[0028] The driving device 9 is a redundant system composed of a double motor, a double speed reducer and a double steel wire rope. If any one of the motor, the speed reducer and the steel wire rope is damaged, the driving device can still normally complete a working cycle and real-time detect the accurate position of the lifting head. When the lifting head approaches the set limit position, the system will automatically decelerate; when the lifting head reaches the set limit position, the system will automatically stop and send out an alarm signal, and only the reverse action can be taken at this time.

[0029] The driving device 9 is equipped with a load cell, with a set accuracy of 1%. When the load exceeds 10% of the rated load, the system will send out an alarm signal and cut off the hoisting power supply. At this time, the hoisting mechanism can only lower but not raise. If underload is detected, indicating that the steel wire rope is slack, the power supply will also be cut off at this time, greatly improving the safety and reliability during operation.

[0030] There are at least two movable pulleys 4. One is installed at the top edge position of the shielding cylinder 5 on the side close to the driving device 9, and the other is installed at the edge position of the through hole 13, and between the driving device 9 and the through hole 13. The design is more reasonable, avoiding frictional damage caused by the direct contact between the steel wire rope and the edge of the equipment.

[0031] When lifting a packaging container, after the lifting head 2 runs downward and guides into the lifting ring of the packaging container, the outer sleeve 20 of the lifting head descends by its own gravity. The outer sleeve 20 of the lifting head pushes the rotary sleeve 29 to rotate. The pawl 18 on the rotary sleeve 29 pushes the ratchet wheel 17 to rotate. The ratchet wheel 17 drives the collar 28 to rotate. The protrusion in the collar 28 drives the push rod 25 to move inward. The push rod 25 pushes the claw 27 to open and grab the packaging container, and the lifting head 2 is raised to complete the lifting work.

[0032] Conversely, after the lifting of the packaging container is ended and the packaging container is lowered, the outer sleeve 20 of the lifting head descends by its own gravity. The outer sleeve 20 of the lifting head pushes the rotary sleeve 29 to rotate. The pawl 18 on the rotary sleeve 29 pushes the ratchet wheel 17 to rotate. The ratchet wheel 17 drives the collar 28 to rotate. When the groove position in the collar 28 aligns with the push rod 25, the return spring on the push rod 25 pushes the push rod 25 to reset. The push rod 25 drives the claw 27 to close and release the packaging container.

[0033] Finally, it should be noted that: Although the present invention and its advantages have been described in detail above, it should be understood that various changes, substitutions and transformations can be made without exceeding the spirit and scope of the present invention as defined by the appended claims. Moreover, the scope of the present invention is not limited to the specific embodiments of the processes, devices, means, methods and steps described in the specification. Those of ordinary skill in the art will readily understand from the disclosure of the present invention that according to the present invention, processes, devices, means, methods or steps that can perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results can be used, existing and to be developed in the future. Therefore, the appended claims are intended to include such processes, devices, means, methods or steps within their scope.

Claims

1. A power-free shielding lifting device, comprising a hook (1), a shielding cylinder (5), a telescopic arm (12), a driving device (9) and a lifting head (2). A first cavity (14) is provided between the hook (1) and the shielding cylinder (5). A plurality of movable pulleys (4) arranged in a straight line are installed in the first cavity (14). The shielding cylinder (5) is provided at the lower end of the first cavity (14). A through hole (13) is provided at the central position of the upper end of the shielding cylinder (5). The outer surface of the shielding cylinder (5) is lined with an outer lining of the shielding cylinder (6). A control console (15) is provided on the outer lining of the shielding cylinder (6). The driving device (9) is installed on the control console (15). The inner surface of the shielding cylinder (5) is lined with an inner lining of the shielding cylinder (7). A plurality of symmetric telescopic guide bars (3) are installed on the inner lining of the shielding cylinder (7). Guide wheels are installed on the telescopic guide bars (3). A telescopic arm (12) is installed in the cavity (8). The upper end of the telescopic arm (12) is connected to a steel wire rope (10). The other end of the steel wire rope (10) passes through the through hole (13) and then passes through the movable pulley (4) to be connected to the driving device (9). A plurality of guide grooves are provided on the telescopic arm (12). Each guide groove is slidably connected to the telescopic guide bar (3). The lower end of the telescopic arm (12) is equipped with a lifting head (2). Characterized in that: The lifting head (2) includes a lifting cover (19). The lower end of the lifting cover (19) is connected to the outer sleeve of the lifting head (20). The outer sleeve of the lifting head (20) is provided with multiple up-and-down movement guiding grooves (31). A rotating sleeve (29) is installed inside the outer sleeve of the lifting head (20). The rotating sleeve (29) is provided with multiple rotation limiting grooves (37). A sliding rod (22) is arranged in each rotation limiting groove (37). One end of the sliding rod (22) is fixed to the outer sleeve of the lifting head (20), and the other end is slidably connected to the rotation limiting groove (37). An up-and-down movement guiding sleeve (23) is installed inside the rotating sleeve (29). Multiple load-bearing rods (21) are installed on the up-and-down movement guiding sleeve (23). One end of the load-bearing rod (21) is connected to the up-and-down movement guiding sleeve (23), and the other end is slidably connected to the up-and-down movement guiding groove (31). A third rolling bearing (32) is installed at the lower end of the up-and-down movement guiding sleeve (23). The third rolling bearing (32) is sleeved on the non-return shaft (24). A collar (28) is installed at the lower end of the third rolling bearing (32). The interior of the collar (28) is provided with evenly distributed grooves and protrusions, and the grooves and protrusions are arranged at intervals. A ratchet wheel (17) is sleeved on the upper end of the collar (28). A ratchet pawl (18) is installed beside the ratchet wheel (17). The ratchet pawl (18) is connected to the rotating sleeve (29) through a pull rod (30). A second rolling bearing (34) is installed between the collar (28) and the non-return shaft (24). Multiple through holes are provided on the non-return shaft (24) at the same horizontal plane. A push rod (25) is installed in each through hole. A return spring is installed on the push rod (25). One end of the push rod (25) contacts the groove or protrusion inside the collar (28), and the other end is connected to the upper end of the claw (27) through a first pin shaft (36). A through hole is provided on the claw (27). A plum blossom seat (26) is installed at the lower end of the non-return shaft (24). Multiple second pin shafts (35) are installed inside the plum blossom seat (26). A first rolling bearing (33) is installed on each second pin shaft (35). The first rolling bearing (33) is in rolling connection with the through hole on the claw (27). A tool guiding seat (16) is installed at the lower end of the plum blossom seat (26). The lower end of the claw (27) is placed inside the tool guiding seat (16).

2. The non-powered shielding lifting device according to claim 1, characterized in that: A trimming weight (11) is installed on the outer lining of the shielding cylinder (6).

3. The non-powered shielding lifting device according to claim 1, characterized in that: The driving device (9) is a redundant system composed of a double motor, a double speed reducer and a double steel wire rope.

4. The non-powered shielding lifting device according to claim 1, characterized in that: A weighing sensor is installed on the driving device (9).

5. The non-powered shielding lifting device according to claim 1, characterized in that: The multiple movable pulleys (4) are at least two. One is installed at the edge position of the top end of the shielding cylinder (5) on the side close to the driving device (9), and the other is installed at the edge position of the through hole (13) and is between the driving device (9) and the through hole (13).

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