Lifting appliance and crane

Abstract

This invention relates to the field of lifting equipment technology for hydropower stations, specifically disclosing a lifting device and crane. The lifting device includes a lifting platform, a correction assembly, and a protective assembly. The axis of the lifting platform is arranged vertically. The correction assembly includes a drive component, ropes, and a level sensor. The upper ends of multiple ropes are connected to the drive component, and the lower ends of multiple ropes are connected to the upper end of the lifting platform. The lower ends of the ropes are spaced apart circumferentially on the lifting platform. The drive component can independently control the winding or unwinding of each rope. The level sensor is connected to the lifting platform and electrically connected to the drive component. The protective assembly includes a protective plate and an elastic element. The protective plate is connected to the lifting platform, the upper end of the elastic element is connected to the lifting platform, and the lower end of the elastic element is connected to the protective plate. The protective plate is movable along the axis of the lifting platform, allowing it to have an unlocked position and a blocking position. This invention, through the arrangement of the correction assembly and the protective assembly, achieves the functions of automatic leveling and protection of the lifting device.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology for hydropower stations, and in particular to a lifting device and a crane. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range; it is also called an overhead crane, gantry crane, or hoist. The main characteristic of a tire-mounted crane is that its driver's cab and lifting control cab are combined into one unit. It evolved from a crawler crane, replacing the crawler tracks and traveling support of the traveling mechanism with a tire-covered chassis. In hydroelectric power plant buildings, large quantities of goods require the use of cranes for lifting and transporting. However, during lifting and transport, goods are prone to swaying of the ropes during rapid movement or strong winds, leading to tilting and slippage of the goods.

[0003] The anti-sway device for a crane lifting device described in patent application CN211920676U includes components such as a suspension plate, a balancing motor, and balancing steel cables. Through the cooperation of the lifting steel cables and the suspension plate, during the horizontal movement of the lifting process, because there is a certain angle between the four lifting steel cables and the suspension plate, under the action of the weight of the cargo, the four lifting steel cables will generate a certain horizontal tension on the suspension plate, thereby ensuring that it will not easily sway or reducing the amplitude of swaying during the movement.

[0004] However, existing anti-sway devices have certain limitations in identifying and correcting spreader tilt. They often cannot detect the tilt status of the spreader in real time and accurately and make effective corrections. In addition, when the wind is strong or the crane starts / stops quickly, the risk of cargo tilting and slipping is still high. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a lifting device and crane, which, through the arrangement of a correction component and a protective component, achieves the functions of automatic leveling and protection of the lifting device.

[0006] The lifting device according to a first aspect of the present invention includes a lifting platform, a correction assembly, and at least one protective assembly. The axis of the lifting platform is arranged in a vertical direction. The correction assembly includes a drive member, ropes, and a level sensor. The drive member is adapted to be connected to a crane. There are multiple ropes, the upper ends of which are all connected to the drive member, and the lower ends of which are all connected to the upper end of the lifting platform. The lower ends of the ropes are distributed circumferentially on the lifting platform. The drive member can independently control the winding or unwinding of each rope. The level sensor is connected to the lifting platform and electrically connected to the drive member. The protective assembly includes a protective plate and an elastic element. The protective plate is connected to the lifting platform, the upper end of the elastic element is connected to the lifting platform, and the lower end of the elastic element is connected to the protective plate. The protective plate is movable along the axis of the hanging platform to provide an unlocked position and a blocking position. When the hanging platform is horizontal, the upper edge of the protective plate is not higher than the upper edge of the hanging platform due to its own weight and the tension of the elastic element, and the protective plate is in the unlocked position. When the hanging platform is tilted, a portion of the protective plate presses against the hanging platform, so that a portion of the protective plate is supported by the hanging platform. At this time, the tension of the elastic element is parallel to the axis of the hanging platform, and the tension of the elastic element is greater than the component of the weight of the protective plate in the axis of the hanging platform. The elastic element contracts and causes at least a portion of the protective plate to be above the hanging platform, and the protective plate is in the protected position.

[0007] In this embodiment of the invention, the lifting device, through the setting of the correction component, can automatically identify the levelness of the lifting platform when it becomes unstable by swaying left and right. The level sensor below the platform automatically identifies the current levelness and sends the tilt angle and tilt direction data to the drive unit. Upon receiving the information, the drive unit automatically winds up the rope according to the different data, winding the rope at different degrees and positions into the drive unit, thereby achieving automatic leveling of the lifting platform using the rope and maintaining stable lifting and movement. Furthermore, through the setting of the protective component, when the correction component malfunctions or other unexpected situations cause the lifting platform to tilt and fail to return to a level state, the elastic element moves the protective plate from the unlocked position to the blocking position, protecting items in the middle of the lifting platform and preventing them from slipping and causing safety problems.

[0008] In some embodiments, the protective assembly further includes a telescopic rod, the upper end of which is connected to the hanging platform and the axis of the telescopic rod is parallel to the axis of the hanging platform, and the lower end of the telescopic rod is connected to the protective plate.

[0009] In some embodiments, the telescopic rod is provided with an air inlet and an exhaust outlet, both of which are connected to the interior of the telescopic rod. The diameter of the air inlet is larger than the diameter of the exhaust outlet, and both the air inlet and the exhaust outlet are provided with a one-way valve.

[0010] In some embodiments, the protective component further includes a counterweight limiting block connected to and located below the protective plate. The counterweight limiting block is used to adjust the center of gravity of the protective plate and limit the range of movement of the protective plate.

[0011] In some embodiments, the lifting device further includes a warning component. The lifting platform includes an upper plate, a lower plate, and a spiral column. The two ends of the spiral column are respectively connected to the upper plate and the lower plate, and the axis of the spiral column is parallel to the axis of the lifting platform. The warning component includes a connecting rod, a push handle, a rotating ring, and at least one blade. The two ends of the connecting rod are respectively connected to the protective plate and the push handle. The push handle is sleeved on the spiral column and movable along the axial direction of the spiral column. The rotating ring is sleeved on the spiral column and threadedly engaged with the spiral column. The lower end of the rotating ring abuts against the upper end of the push handle. The blade is connected to the rotating ring, and the length direction of the blade is arranged radially along the rotating ring. The blade is made of reflective material, or reflective strips are attached to the blade.

[0012] In some embodiments, there are multiple protective components, spiral columns, and warning components. The multiple protective components are distributed at intervals along the circumference of the hanging plate, and there is a spiral column between two adjacent protective components. The multiple warning components correspond one-to-one with the multiple spiral columns, and the push handle and the rotating ring are both sleeved on the corresponding spiral columns.

[0013] In some embodiments, the correction assembly further includes a plurality of connectors, each of which corresponds to a plurality of ropes. Each connector is detachably connected to the lifting device and located above the lifting platform, and the lower end of each rope is connected to the corresponding connector.

[0014] In some embodiments, at least one slag-leaking channel is provided on the hanging plate, and the slag-leaking channel extends through the hanging plate in the vertical direction.

[0015] The crane according to a second aspect of the present invention includes a base, a crane body, and a lifting device. The base is adapted to be connected to the ground, the crane body is connected to the base, and the lifting device is connected to the crane body. The lifting device is the lifting device described in any of the above embodiments.

[0016] In this embodiment of the invention, the crane utilizes the lifting platform described above. When the platform becomes unstable and sways left and right, the level sensor beneath the platform automatically identifies its levelness and sends the tilt angle and direction data to the drive unit. Upon receiving the information, the drive unit automatically winds up the ropes according to the different data, winding the ropes at different degrees and positions into the drive unit. This achieves automatic leveling of the platform using the ropes, maintaining stable lifting and movement. When the correction component malfunctions or other unexpected situations cause the platform to tilt and fail to return to a level state, the elastic element moves the protective plate from the unlocked position to the blocking position to protect items in the middle of the platform, preventing items from slipping and causing safety issues.

[0017] In some embodiments, the crane further includes a first hook and a second hook lock, the first hook lock being connected to the crane body and the second hook lock being connected to the drive component of the lifting device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the lifting device according to an embodiment of the present invention.

[0019] Figure 2 This is the present invention. Figure 1 A magnified view of a portion of point a.

[0020] Figure 3 This is a partial structural schematic diagram of the lifting device according to an embodiment of the present invention.

[0021] Figure 4 This is the present invention. Figure 3 A magnified view of a section at point b.

[0022] Figure 5 This is an exploded view of the lifting device according to an embodiment of the present invention.

[0023] Figure 6 This is a three-dimensional schematic diagram of the warning component according to an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the movement of the lifting device according to an embodiment of the present invention. Figure 1 .

[0025] Figure 8 This is a schematic diagram of the movement of the lifting device according to an embodiment of the present invention. Figure 2 .

[0026] Figure 9 This is a schematic diagram of a crane according to an embodiment of the present invention.

[0027] Figure label:

[0028] Hanging plate 1, upper plate 11, lower plate 12, spiral column 13.

[0029] Correction assembly 2, drive unit 21, rope 22, level sensor 23, connector 24.

[0030] Protective component 3, protective plate 31, elastic element 32, telescopic rod 33, air inlet 331, exhaust outlet 332, counterweight limit block 34.

[0031] Warning component 4, connecting rod 41, push handle 42, rotating ring 43, blade 44

[0032] Base 5,

[0033] Crane body 6,

[0034] First hook 7,

[0035] Second hook lock 8. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] The lifting device and crane of the present invention are described below with reference to the accompanying drawings.

[0038] like Figure 1-8 As shown, the lifting device according to the first aspect of the present invention includes a lifting platform 1, a correction assembly 2, and at least one protective assembly 3. Wherein:

[0039] The axis of the lifting platform 1 is set along the vertical direction. The lifting platform 1 is the core load-bearing component of the entire lifting device, used to carry and lift items. The shape and size of the lifting platform 1 can be designed according to actual needs, but it is usually designed as a circle, square or other shapes that are convenient for placing and lifting items.

[0040] The alignment correction assembly 2 includes a drive unit 21, ropes 22, and a level sensor 23. The alignment correction assembly 2 monitors the horizontal state of the hoisting platform 1 in real time and adjusts it when the platform tilts to ensure stability during hoisting. The drive unit 21 is adapted to be connected to a crane and can be a drive device such as multiple motors or winches capable of winding and releasing the ropes 22, and is controlled by a unified control system. There are multiple ropes 22, with the upper ends of each rope connected to the drive unit 21 and the lower ends of each rope connected to the upper end of the hoisting platform 1. The lower ends of the ropes 22 are distributed circumferentially on the hanging platform 1 to ensure the stability of the hanging platform 1 in the horizontal direction. The drive unit 21 can independently control each rope 22 to rewind or unwind, so as to ensure that the leveling of the hanging platform 1 can be carried out smoothly. The level sensor 23 is connected to the hanging platform 1 and electrically connected to the drive unit 21. It can monitor the level status of the hanging platform 1 in real time and feed back the monitoring results to the drive unit 21. When the hanging platform 1 tilts, the level sensor 23 will send a signal, and the drive unit 21 will make corresponding adjustment operations according to the signal.

[0041] The protective assembly 3 includes a protective plate 31 and an elastic element 32. The protective assembly 3 is used to provide additional support and protection when the hanging platform 1 is tilted to prevent items from slipping off the hanging platform 1 or being damaged. The protective plate 31 is connected to the hanging platform 1, and its shape and size can be designed according to actual needs. The upper end of the elastic element 32 is connected to the hanging platform 1, and the lower end of the elastic element 32 is connected to the protective plate 31. The elastic element 32 can be a spring, an elastic band, or other elastic element 32 that can generate elastic tension. Its function is to provide stable tension so that the protective plate 31 can quickly move to the blocking position when the hanging platform 1 is tilted.

[0042] The protective plate 31 is movable along the axis of the lifting platform 1, so that the protective plate 31 has an unlocked position and a blocking position:

[0043] When the lifting platform 1 is in a horizontal state, under the action of its own weight and the tension of the elastic element 32, the upper edge of the protective plate 31 is not higher than the upper edge of the lifting platform 1. At this time, the protective plate 31 is in the unlocked position and the protective plate 31 will not cause any obstruction to the lifting of the items.

[0044] When the hanging platform 1 is tilted, a portion of the protective plate 31 presses against the hanging platform 1, so that a portion of the protective plate 31 is supported by the hanging platform 1. At this time, the tension of the elastic member 32 is parallel to the axial direction of the hanging platform 1, and the tension of the elastic member 32 is greater than the component of the weight of the protective plate 31 in the axial direction of the hanging platform 1. The elastic member 32 contracts and drives at least a portion of the protective plate 31 to be above the hanging platform 1. At this time, the protective plate 31 is in the protective position, blocking the items on the hanging platform 1 to prevent them from falling.

[0045] During hoisting, when the hoisting platform 1 remains horizontal, the protective plate 31 is in the unlocked position and will not affect the hoisting of the items. When the hoisting platform 1 tilts for some reason, the level sensor 23 will immediately detect this change and send a signal to the drive component 21. The drive component 21 will make corresponding adjustment operations according to the signal to try to restore the horizontal state of the hoisting platform 1. At the same time, the protective plate 31 will also move quickly to the blocking position under the pulling force of the elastic component 32 to prevent the items from slipping off the hoisting platform 1 and being damaged.

[0046] In this embodiment of the invention, the lifting device, through the setting of the correction component 2, can automatically identify the levelness of the lifting platform 1 when it becomes unstable by swaying left and right. The level sensor 23 below the lifting platform 1 can automatically identify the levelness of the lifting platform 1 at this time and automatically send the tilt angle and tilt direction data information to the drive component 21. After receiving the information, the drive component 21 will automatically wind up the rope 22 according to different data information, winding the rope 22 to different degrees and positions into the drive component 21, thereby realizing the automatic leveling of the lifting platform 1 by using the rope 22 to maintain its stable lifting and movement. In this embodiment of the invention, the lifting device, through the setting of the protective component 3, can prevent the lifting platform 1 from tilting and failing to return to a level state when the correction component 2 fails to work properly or other unexpected situations occur. The elastic component 32 drives the protective plate 31 to move from the unlocked position to the blocking position to protect the items in the middle of the lifting platform 1 and prevent the items from slipping and causing safety problems.

[0047] like Figure 3 and Figure 4 As shown, in some embodiments, the protective component 3 further includes a telescopic rod 33, the upper end of which is connected to the hanging platform 1, and the axis of the telescopic rod 33 is parallel to the axis of the hanging platform 1, and the lower end of the telescopic rod 33 is connected to the protective plate 31.

[0048] Understandably, the telescopic rod 33 makes the transition of the protective plate 31 between the unlocked position and the blocking position smoother and more reliable, thereby improving the overall safety and stability of the lifting device. Moreover, when the lifting platform 1 tilts, the telescopic rod 33 can not only provide additional support, but also effectively limit the movement trajectory of the protective plate 31, preventing it from colliding with the lifting platform 1 or other components due to excessive swinging.

[0049] like Figure 4 As shown, the telescopic rod 33 is further provided with an air inlet 331 and an exhaust outlet 332. Both the air inlet 331 and the exhaust outlet 332 are connected to the interior of the telescopic rod 33. The diameter of the air inlet 331 is larger than the diameter of the exhaust outlet 332. Both the air inlet 331 and the exhaust outlet 332 are provided with a one-way valve.

[0050] It should be noted that, since both the air inlet 331 and the exhaust outlet 332 are equipped with one-way valves, gas can only enter the telescopic rod 33 through the air inlet 331 and exit through the exhaust outlet 332. When the hanging platform 1 is tilted, the gas can quickly enter the telescopic rod 33 through the larger diameter air inlet 331, thereby reducing the impact on the movement of the protective plate 31 and allowing the protective plate 31 to quickly move from the unlocked position to the blocked position. When the hanging platform 1 returns to a horizontal state, because the diameter of the exhaust outlet 332 is smaller, the gas exits more slowly, and the telescopic rod 33 gradually retracts, causing the protective plate 31 to slowly move from the blocked position back to the unlocked position. This increases the protection time of the protective plate 31 on the object and further reduces the risk of the object falling.

[0051] like Figures 3 to 5 As shown, in some embodiments, the protective component 3 further includes a counterweight limiting block 34, which is connected to the protective plate 31 and located below the protective plate 31. On the one hand, the counterweight limiting block 34 is used to adjust the center of gravity of the protective plate 31 to make it more stable during movement. On the other hand, the counterweight limiting block 34 also limits the range of movement of the protective plate 31 to prevent it from colliding with other components or causing movement interference due to excessive movement.

[0052] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the hanging platform 1 includes an upper plate 11, a lower plate 12, and a spiral column 13. The two ends of the spiral column 13 are connected to the upper plate 11 and the lower plate 12 respectively, and the axis of the spiral column 13 is parallel to the axis of the hanging platform 1. The upper plate 11 and the lower plate 12 serve as the top and bottom support structures of the hanging platform 1 respectively, while the spiral column 13 serves as a bridge connecting the two, which not only enhances the structural strength of the hanging platform 1, but also provides the necessary mechanical linkage basis for the warning component 4 and the protective component 3.

[0053] The lifting device also includes a warning component 4, which includes a connecting rod 41, a push handle 42, a rotating ring 43, and at least one blade 44. The two ends of the connecting rod 41 are connected to the protective plate 31 and the push handle 42, respectively. The push handle 42 is sleeved on the spiral column 13 and is movable along the axial direction of the spiral column 13. The rotating ring 43 is sleeved on the spiral column 13 and threadedly engaged with the spiral column 13, so that when the rotating ring 43 moves along the axial direction of the spiral column 13, the rotating ring 43 will rotate around the axis of the spiral column 13 as the center of rotation. The lower end of the rotating ring 43 abuts against the upper end of the push handle 42. The blade 44 is connected to the rotating ring 43, and the length direction of the blade 44 is arranged along the radial direction of the rotating ring 43. The blade 44 is made of reflective material, or a reflective strip is attached to the blade 44.

[0054] It should be noted that when the hoisting platform 1 is tilted, the protective plate 31 moves from the unlocked position to the blocking position under the elastic force of the elastic element 32. At this time, the protective plate 31 drives the rotating ring 43 to move along the axis of the spiral column 13 through the connecting rod 41 and the push handle 42. The rotating ring 43 drives the blade 44 to rotate, producing a clear visual effect to warn the surrounding staff.

[0055] like Figures 1 to 7 As shown, in some embodiments, there are multiple protective components 3, spiral columns 13 and warning components 4. Multiple protective components 3 are distributed at intervals along the circumference of the hanging plate 1, and there is a spiral column 13 between two adjacent protective components 3. Multiple warning components 4 correspond one-to-one with multiple spiral columns 13. Push handle 42 and rotating ring 43 are both sleeved on the corresponding spiral column 13.

[0056] Understandably, multiple protective components 3, multiple spiral columns 13, and multiple warning components 4 can protect the items on the lifting platform 1 from multiple directions and issue warning signals to surrounding personnel from multiple directions, further improving the safety of the lifting equipment.

[0057] like Figure 1 As shown, in some embodiments, the correction component 2 further includes multiple connectors 24, each corresponding to a multiple rope 22. The multiple connectors 24 are detachably connected to the lifting device and located above the lifting platform 1, and the lower end of the rope 22 is connected to the corresponding connector 24.

[0058] Understandably, the design of this detachable connector 24 makes it easier to maintain and replace parts of the spreader. When a connector 24 or rope 22 fails, workers can quickly remove it and replace it with a new part without disassembling the entire spreader. This not only improves work efficiency but also reduces maintenance costs.

[0059] In some embodiments, at least one slag-leaking channel (not shown) is provided on the lifting platform 1. The slag-leaking channel extends through the lifting platform 1 in the vertical direction. When the hoisted items contain impurities or debris, they can fall through the slag-leaking channel, thus preventing the accumulation of impurities or debris from affecting the hoisting.

[0060] like Figure 9 As shown, the crane according to the second aspect embodiment of the present invention includes a base 5, a crane body 6, and a lifting device. Wherein:

[0061] The base 5 is suitable for connection to the ground and provides stable support for the crane body 6. The design of the base 5 should take into account the bearing capacity of the ground and the weight distribution of the crane to ensure the stability of the crane during operation.

[0062] The crane body 6 is connected to the base 5 and is responsible for realizing various actions in lifting operations. Typically, the crane body 6 includes key components such as the boom, slewing mechanism, and luffing mechanism. The boom is used to extend and retract to cover different working ranges; the slewing mechanism allows the crane body 6 to rotate in a horizontal plane to adapt to different working directions; the luffing mechanism is used to adjust the tilt angle of the boom to meet lifting requirements at different heights and distances. The crane body 6 can also be equipped with other functional or auxiliary components to achieve other different functions.

[0063] The lifting device is connected to the crane body 6 and is used to directly lift items. The lifting device is the lifting device of any of the above embodiments. This lifting device has automatic correction, safety protection and warning functions, which can greatly improve the safety and efficiency of lifting operations. The specific structure and function of the lifting device have been described in the previous embodiments and will not be repeated here.

[0064] In this embodiment of the invention, the crane uses the lifting platform 1 described above. When the lifting platform 1 becomes unstable and sways left and right, the level sensor 23 below the lifting platform 1 can automatically identify the levelness of the lifting platform 1 at this time and automatically send the tilt angle and tilt direction data information to the drive component 21. After receiving the information, the drive component 21 will automatically wind up the rope 22 according to different data information, winding the rope 22 to different degrees and positions into the drive component 21, thereby realizing the automatic leveling of the lifting platform 1 using the rope 22 and maintaining its stable lifting and movement. When the correction component 2 fails to work properly or other unexpected situations occur, causing the lifting platform 1 to tilt and fail to return to a level state, the elastic element 32 drives the protective plate 31 to move from the unlocked position to the blocking position to protect the items in the middle of the lifting platform 1 and prevent the items from slipping and causing safety problems.

[0065] like Figure 1 and Figure 9 As shown, in some embodiments, the crane further includes a first hook 7 and a second hook lock 8, the first hook lock 7 being connected to the crane body 6 and the second hook lock 8 being connected to the drive component 21 of the lifting device.

[0066] Understandably, the first hook and the second hook lock 8 allow for quick replacement of the lifting equipment to adapt to different lifting needs in various scenarios.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A lifting device, characterized in that, include: A hanging platform, wherein the axis of the hanging platform is set in the vertical direction; A correction assembly includes a drive unit, ropes, and a level sensor. The drive unit is adapted to be connected to a crane. There are multiple ropes, the upper ends of which are connected to the drive unit, and the lower ends of which are connected to the upper end of the crane platform. The lower ends of the multiple ropes are distributed circumferentially on the crane platform. The drive unit can independently control each rope to wind up or unwind. The level sensor is connected to the crane platform and electrically connected to the drive unit. At least one protective component, the protective component including a protective plate and an elastic element, the protective plate being connected to the hanging platform, the upper end of the elastic element being connected to the hanging platform, and the lower end of the elastic element being connected to the protective plate; The protective plate is movable along the axis of the hanging platform to have an unlocked position and a blocking position. When the hanging platform is horizontal, under the action of its own weight and the tension of the elastic element, the upper edge of the protective plate is not higher than the upper edge of the hanging platform, and the protective plate is in the unlocked position. When the hanging platform is tilted, a part of the protective plate is pressed on the hanging platform, so that a part of the protective plate is supported by the hanging platform. At this time, the tension of the elastic element is parallel to the axis of the hanging platform, and the tension of the elastic element is greater than the component of the weight of the protective plate in the axis of the hanging platform. The elastic element contracts and drives at least a part of the protective plate to be above the hanging platform, and the protective plate is in the protected position.

2. The lifting device according to claim 1, characterized in that, The protective assembly also includes a telescopic rod, the upper end of which is connected to the hanging platform, and the axis of the telescopic rod is parallel to the axis of the hanging platform. The lower end of the telescopic rod is connected to the protective plate.

3. The lifting device according to claim 2, characterized in that, The telescopic rod is provided with an air inlet and an exhaust outlet, both of which are connected to the interior of the telescopic rod. The diameter of the air inlet is larger than the diameter of the exhaust outlet, and both the air inlet and the exhaust outlet are provided with a one-way valve.

4. The lifting device according to any one of claims 1-3, characterized in that, The protective component also includes a counterweight limiting block, which is connected to the protective plate and located below the protective plate. The counterweight limiting block is used to adjust the center of gravity of the protective plate and limit the range of movement of the protective plate.

5. The lifting device according to claim 1, characterized in that, It also includes a warning component. The hanging plate includes an upper plate, a lower plate, and a spiral column. The two ends of the spiral column are connected to the upper plate and the lower plate, respectively, and the axis of the spiral column is parallel to the axis of the hanging plate. The warning component includes a connecting rod, a push handle, a rotating ring, and at least one blade. The two ends of the connecting rod are connected to the protective plate and the push handle, respectively. The push handle is sleeved on the spiral column and is movable along the axis of the spiral column. The rotating ring is sleeved on the spiral column and threadedly engaged with the spiral column. The lower end of the rotating ring abuts against the upper end of the push handle. The blade is connected to the rotating ring, and the length direction of the blade is arranged radially along the rotating ring. The blade is made of reflective material, or a reflective strip is attached to the blade.

6. The lifting device according to claim 5, characterized in that, There are multiple protective components, spiral columns, and warning components. The multiple protective components are distributed at intervals along the circumference of the hanging plate, and there is a spiral column between two adjacent protective components. The multiple warning components correspond one-to-one with the multiple spiral columns. The push handle and the rotating ring are both sleeved on the corresponding spiral columns.

7. The lifting device according to claim 1, characterized in that, The correction assembly also includes multiple connectors, each corresponding to one of the multiple ropes. Each connector is detachably connected to the lifting device and located above the lifting platform. The lower end of each rope is connected to the corresponding connector.

8. The lifting device according to claim 1, characterized in that, At least one slag-leaking channel is provided on the hanging platform, and the slag-leaking channel extends through the hanging platform in the vertical direction.

9. A crane, characterized in that, include: Base, the base being adapted to be connected to the ground; The crane body is connected to the base; A lifting device, which is connected to the crane body, wherein the lifting device is the lifting device according to any one of claims 1-8.

10. The crane according to claim 9, characterized in that, It also includes a first hook lock and a second hook lock, the first hook lock being connected to the crane body and the second hook lock being connected to the drive component of the lifting device.

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