Hoisting method for hoisting prefabricated square block and hoisting tool thereof

Abstract

The invention relates to a hoisting method for hoisting a prefabricated square block and a hoisting tool thereof, and belongs to the technical field of hoisting slings. The method for hoisting the prefabricated square block comprises the following steps that S1, a rotating block on the lower portion of a hoisting rod is adjusted to be in a folded state through an adjusting piece, the top of the hoisting rod is connected to a first hoisting hook, and the first hoisting hook is lifted; the lifting rod is controlled to enter a lifting hole of the prefabricated square block; s2, a rotating block is switched to be in an open state through an adjusting piece, a first lifting hook is lifted, the rotating block is clamped in a lifting hole, and a lifting rod drives the prefabricated square block to be lifted to a preset position; and S3, the first lifting hook is lowered, the rotating block is switched to be in the folded state through the adjusting piece, the first lifting hook is lifted again, and the lifting rod is made to leave the lifting hole. According to the hoisting method, the state of the rotating block is accurately controlled, so that in the hoisting process, the prefabricated square block can be reliably connected to the hoisting tool, and safety accidents such as falling are not prone to occurring; and when the lifting rod is separated from the lifting hole, collision or damage caused by the fact that the rotating block is not folded in time can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of slings, and in particular relates to a hoisting method and a sling for hoisting prefabricated blocks. Background Art

[0002] A gravity-type block pier or embankment is a wall structure formed by a number of precast solid or hollow concrete blocks laid in a specific pattern. During the construction of a gravity-type pier, the blocks must be precisely positioned to ensure structural stability and durability, making their precise installation crucial.

[0003] At present, the traditional process of lifting prefabricated blocks is to use a water crane vessel connected to a lifting device to lift, position, install and adjust the blocks. The automatic unhooking technology of the lifting device can be of great help to the lifting process.

[0004] In the prior art, Chinese invention patent application CN112173969A proposes a hydraulic self-balancing sling system for large components and its operating method. This system uses a lifting ring at the bottom of the sling to lift the large component. Wireless inclination sensors installed on the sling and on the underside of the large component monitor the position and posture parameters of the large component, and adjust the posture of the large component using a hydraulic cylinder. While this patent can accurately lift large components to a preset position, its complex structure and cumbersome operation result in low lifting efficiency, making it unsuitable for lifting prefabricated blocks in engineering projects.

[0005] Therefore, how to provide a lifting device for lifting prefabricated blocks is a technical problem that urgently needs to be solved. Summary of the Invention

[0006] In response to the shortcomings of the prior art, the present invention provides a lifting method and a lifting device for lifting prefabricated blocks. By arranging a rotating block at the lower part of the lifting rod, the lifting rod can be firmly clamped in the lifting hole of the prefabricated block, ensuring that the prefabricated block can be lifted more quickly and no displacement will occur during the lifting and placement process; at the same time, through the setting of the adjusting part, the rotating block can be quickly converted between the open state and the retracted state, so that the lifting, positioning and installation of the prefabricated block can be completed quickly, greatly improving the lifting efficiency of the prefabricated block.

[0007] The present invention provides a method for hoisting prefabricated blocks, comprising the following steps:

[0008] S1, using the adjusting member to adjust the rotating block at the bottom of the boom to the retracted state, connecting the top of the boom to the first lifting hook, lifting the first lifting hook, and controlling the boom to enter the lifting hole of the prefabricated block;

[0009] S2, use the adjustment member to switch the rotating block to the open state, lift the first lifting hook, so that the rotating block is stuck in the lifting hole, and the lifting rod drives the prefabricated block to the preset position;

[0010] S3, lower the first lifting hook, use the adjustment member to switch the rotating block to the retracted state, and lift the first lifting hook again to make the boom leave the lifting hole.

[0011] This technical solution precisely controls the state of the rotating block, so that during the lifting process, the prefabricated blocks can be reliably connected to the lifting equipment, and are less likely to fall off or other safety accidents; when the boom is out of the lifting hole, it can also avoid collision or damage caused by the rotating block not being retracted in time.

[0012] In some embodiments, the method of switching the state of the rotating block using the adjustment member includes: using a driver disposed within the suspension rod to drive a swing arm to rotate, which in turn drives the rotating block to retract or unfold the rotating block. This technical solution ensures that the rotating block can reliably engage with the lifting hole of the prefabricated block under different working conditions.

[0013] In some embodiments, the method of switching the state of the rotating block using the adjustment member includes: connecting a pulling member disposed within the boom to a second lifting hook; raising the second lifting hook, causing the rotating block to rotate upward and retract along with the pulling member; and simultaneously stretching and accumulating force in an elastic member disposed at the bottom of the boom and in contact with the rotating block; releasing the second lifting hook, causing the rotating block to return to the open state under the elastic force of the elastic member. This technical solution ensures that the rotating block can quickly return to the open state when the second lifting hook is released.

[0014] In addition, the present invention also provides a hoisting tool for hoisting prefabricated blocks, which is applied to the hoisting method for hoisting prefabricated blocks as described above, comprising:

[0015] A suspender rod, at least one suspender rod is provided, the top of the suspender rod is used to connect to the first lifting hook, and the lower part of the suspender rod is used to extend into the lifting hole inside the prefabricated block to lift the prefabricated block;

[0016] A connecting rod is installed between adjacent booms and is used to connect the booms;

[0017] The rotating block has a through hole at the bottom of the boom, and the rotating block is installed in the through hole and is rotatably connected to the boom; the rotating block includes an open state and a retracted state. When the rotating block is in the retracted state, the boom can be extended into the hanging hole; when the rotating block is in the open state, the rotating block is clamped in the hanging hole to lift the prefabricated block;

[0018] The adjusting piece is hollow inside the boom, and the adjusting piece is arranged inside the boom and connected to the rotating block for adjusting the state of the rotating block.

[0019] This technical solution sets a rotating block at the lower part of the lifting rod, so that the lifting rod can be firmly stuck in the lifting hole of the prefabricated block, ensuring that the prefabricated block can be lifted more quickly and will not deviate during the lifting and placement process; at the same time, through the setting of the adjustment part, the rotating block can be quickly switched between the open state and the retracted state, so that the lifting, positioning and installation operations of the prefabricated block can be completed quickly, greatly improving the lifting efficiency of the prefabricated block.

[0020] In some embodiments, the adjustment member includes a driver and a rocker arm. The driver is fixed inside the boom. One end of the rocker arm is hinged to the driver, and the other end is connected to the rotating block. The driver is used to drive the rocker arm to rotate about a hinge point, thereby driving the rotating block to retract or extend the rotating block. In this technical solution, the driver can precisely rotate the rotating block by driving the rocker arm about a hinge point, achieving the transition between the retracted and extended states.

[0021] In some embodiments, the adjustment member includes:

[0022] The traction member is hollow inside the boom and is arranged inside the boom, one end of which is connected to the second lifting hook and the other end is connected to the rotating block, and is used to pull the rotating block to retract;

[0023] An elastic member is also located in the through-hole at the bottom of the boom. The elastic member is elastically connected to the rotating block and is used to release the elastic force to restore the rotating block to the open state. When the rotating block is in the retracted state, the elastic member is in a stretched state; when the rotating block is in the open state, the elastic member is in a contracted state. This technical solution can easily achieve the state transition of the rotating block, reducing complex operating steps and lowering the difficulty of operation.

[0024] In some embodiments, a limit rod is provided inside the through hole, and the limit rod is used to limit the rotation angle of the rotating block when it is retracted. The technical solution can ensure that the rotating block accurately reaches the preset retraction angle through the provision of the limit rod.

[0025] In some embodiments, the elastic member is a tension spring, one end of which is fixed to the bottom of the through-hole and the other end is connected to the rotating block. In this technical solution, when the pulling member is released, the tension spring can quickly and stably release the stored elastic potential energy, allowing the rotating block to quickly and accurately return to the open state.

[0026] In some embodiments, the elastic member is a torsion spring, the coiled portion of which is wound around the stop rod, and the torsion arm of the torsion spring contacts the rotating block. In this technical solution, when the pulling member is released, the torsion spring rapidly releases its stored energy, providing a stable and precise torque that quickly propels the rotating block back to its open position.

[0027] In some embodiments, the traction member includes a traction rope, an opening is provided at the top of the boom, and a rope hole is provided in the rotating block for passing the traction rope. One end of the traction rope is connected to the second lifting hook, and the other end is connected to the rotating block through the opening and the rope hole. This technical solution, through the provision of the traction rope, can conveniently pull the rotating block via the traction rope to achieve the state transition of the rotating block.

[0028] Based on the above scheme, the lifting method and lifting equipment for lifting prefabricated blocks in the embodiments of the present invention, by setting a rotating block at the lower part of the lifting rod, enable the lifting rod to be firmly stuck in the lifting hole of the prefabricated block, ensuring that the prefabricated block can be lifted more quickly and no displacement will occur during the lifting and placement process; at the same time, through the setting of the adjusting part, the rotating block can be quickly converted between the open state and the retracted state, so that the lifting, positioning and installation of the prefabricated block can be completed quickly, greatly improving the lifting efficiency of the prefabricated block. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 This is a perspective view of a sling for lifting prefabricated blocks in accordance with embodiment 1 of the present invention when the rotating block is retracted;

[0031] Figure 2 This is a perspective view of a lifting device for lifting prefabricated blocks in Example 1 of the present invention with the rotating block opened;

[0032] Figure 3 This is a side view of a hoist for hoisting prefabricated blocks according to Example 1 of the present invention;

[0033] Figure 4 for Figure 3 Sectional view along line AA;

[0034] Figure 5 This is a schematic structural diagram of the connection between the lifting device and the lifting equipment for lifting prefabricated blocks in Example 1 of the present invention;

[0035] Figure 6 This is a structural diagram of a hoisting tool for hoisting prefabricated blocks in Example 1 of the present invention;

[0036] Figure 7 This is a perspective view of a lifting device for lifting prefabricated blocks in Example 2 of the present invention with the rotating block opened;

[0037] Figure 8 This is a perspective view of a sling for hoisting prefabricated blocks according to embodiment 2 of the present invention when the rotating block is retracted;

[0038] Figure 9 This is a side view of a hoist for hoisting prefabricated blocks according to Example 2 of the present invention;

[0039] Figure 10 This is a perspective view of a sling for lifting prefabricated blocks in Example 3 of the present invention with the rotating block opened;

[0040] Figure 11 This is a perspective view of a sling for lifting prefabricated blocks in a third embodiment of the present invention when the rotating block is retracted;

[0041] Figure 12 This is a side view of a hoist for hoisting prefabricated blocks according to Example 3 of the present invention;

[0042] Figure 13 for Figure 12 Cross-sectional view along line BB.

[0043] In the picture:

[0044] 1. Boom; 2. Connecting rod; 3. Rotating block; 4. Driver; 5. Rocker arm; 6. Pulling element; 7. Tension spring; 8. Torsion spring; 9. Prefabricated block; 10. Support leg; 11. First lifting hook; 12. Second lifting hook;

[0045] 101. hanging ear; 102. opening;

[0046] 301, fixed axis; 302, limit rod; 303, rope hole;

[0047] 901, lifting hole; 902, pad;

[0048] 1101. Sling; 1201. Anchor chain. DETAILED DESCRIPTION

[0049] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] like Figures 1-13 As shown, in an embodiment of a hoisting method and a hoisting device for hoisting prefabricated blocks of the present invention, the hoisting device for hoisting prefabricated blocks includes a hoist rod 1, a connecting rod 2, a rotating block 3 and an adjusting member; wherein, at least one hoist rod 1 is provided, the top of the hoist rod 1 is used to connect the first lifting hook 11, and the lower part of the hoist rod 1 is used to extend into the hoisting hole 901 inside the prefabricated block 9 to hoist the prefabricated block 9; the connecting rod 2 is installed between adjacent hoist rods 1 for connecting the hoist rods 1; a through hole is opened at the lower part of the hoist rod 1, and the rotating block 3 is installed in the through hole and is rotatably connected to the hoist rod 1; the rotating block 3 includes an open state and a retracted state, as shown in FIG. Figure 1 As shown, when the rotating block 3 is in the retracted state, the suspension rod 1 can be extended into the suspension hole 901; Figure 2 As shown, when the rotating block 3 is in the open state, the rotating block 3 is stuck in the lifting hole 901 to lift the prefabricated block 9; the interior of the hanging rod 1 is hollow, and the adjusting member is arranged inside the hanging rod 1 and connected to the rotating block 3 for adjusting the state of the rotating block 3.

[0054] In the above-mentioned exemplary embodiment, the sling for hoisting prefabricated blocks is provided with a rotating block 3 at the lower portion of the sling 1, so that the sling 1 can be firmly clamped in the hoisting hole 901 of the prefabricated block 9, ensuring that the prefabricated block 9 can be hoisted more quickly and will not deviate during the hoisting and placement process. At the same time, through the provision of an adjustment member, the rotating block 3 can be quickly switched between the open state and the retracted state, thereby enabling the lifting, positioning, and installation of the prefabricated block 9 to be quickly completed, greatly improving the hoisting efficiency of the prefabricated block 9. Furthermore, the sling in this embodiment has a simple structure and is easy to operate. It does not require complex adjustment and monitoring equipment, which reduces the technical requirements for the operator and can effectively reduce construction costs.

[0055] In some embodiments, as Figure 4As shown, the traction member 6 includes a traction rope, an opening 102 is provided at the top of the boom 1, and a rope hole 303 is provided on the rotating block 3 for passing the traction rope. One end of the traction rope is connected to the second lifting hook 12, and the other end is connected to the rotating block 3 through the opening 102 and the rope hole 303. By providing the traction rope, the rotating block 3 can be conveniently pulled by the traction rope to achieve the state conversion of the rotating block 3, making the state adjustment of the rotating block 3 more convenient and efficient.

[0056] Further, if Figure 5 As shown, an anchor chain 1201 is further provided between the traction rope and the second lifting hook 12, one end of the anchor chain 1201 is connected to the traction rope, and the other end is connected to the second lifting hook 12. When it is necessary to adjust the rotating block 3 to the stowed state, the second lifting hook 12 is lifted, and the anchor chain 1201 and the traction rope are pulled upward in sequence, and one end of the rotating block 3 is lifted to adjust the rotating block 3 to the stowed state; when it is necessary to adjust the rotating block 3 to the open state, the second lifting hook 12 is loosened, the anchor chain 1201 and the traction rope are relaxed, and the rotating block 3 slowly returns to the open state under the action of gravity balance. The rotating block 3 can also be quickly restored to the open state by adjusting the adjusting piece. When the second lifting hook 12 is lifted, the anchor chain 1201 and the traction rope sequentially pull one end of the rotating block 3, accurately realizing the adjustment of the rotating block 3 to the stowed state; when the second lifting hook 12 is loosened, the anchor chain 1201 and the traction rope are relaxed, and the rotating block 3 slowly returns to the open state by relying on its own gravity balance. If the open state needs to be restored quickly, an adjusting piece can also be combined. The setting of anchor chain 1201 not only optimizes the controllability of the state conversion of rotating block 3, but also provides a variety of speed adjustment options, enhances the adaptability of the spreader under different working conditions, meets the diverse needs of lifting operations, and further improves the flexibility and convenience of lifting operations.

[0057] In some embodiments, as Figure 6 As shown, a pad 902 is also provided in the lifting hole 901 inside the prefabricated block 9. When the rotating block 3 is in the open state, the rotating block 3 fits in with the pad 902. The provision of the pad 902 increases the friction and support area of ​​the contact portion between the rotating block 3 and the prefabricated block 9. During the lifting process, the weight of the prefabricated block 9 can be better dispersed, the local stress concentration between the rotating block 3 and the lifting hole 901 can be reduced, and the risk of damage to the rotating block 3 or the lifting hole 901 can be reduced, thereby ensuring the safety and reliability of the lifting process of the prefabricated block 9, helping to extend the service life of the sling and the prefabricated block 9, and ensuring the smooth lifting of the prefabricated block 9 during the construction of a gravity-type block wharf or dam.

[0058] In some embodiments, as Figure 3As shown, a fixed shaft 301 is provided inside the through hole for securing the rotating block 3, and the rotating block 3 is rotatably connected to the fixed shaft 301. The provision of the fixed shaft 301 provides a stable and reliable structural foundation for the installation and rotation of the rotating block 3. At the same time, the rotation path and position of the rotating block 3 are defined, ensuring that the rotating block 3 can accurately and stably transition between the open and retracted states within the through hole of the boom 1, avoiding unstable conditions such as shaking and deflection of the rotating block 3 during movement, and improving the accuracy and reliability of the rotating block 3.

[0059] In some embodiments, as Figure 3 As shown, the top of the boom 1 is provided with a lifting lug 101 for connecting to a lifting device. By providing the lifting lug 101, a stable and standardized connection point can be provided for the boom 1, making the connection between the boom 1 and the lifting device more reliable and convenient.

[0060] Further, if Figure 5 As shown, a sling 1101 is provided through the lifting eye 101, and one end of the sling 1101 is connected to each lifting eye 101 and connected to the first lifting hook 11. By providing the sling 1101, the flexibility and good load-bearing performance of the sling 1101 can be utilized to ensure the connection strength while adapting to changes in different angles and stress conditions.

[0061] In some embodiments, as Figure 13 As shown, a support leg 10 is provided below the connecting rod 2 for limiting the depth of the boom 1 inserted into the interior of the prefabricated block 9. The support leg 10 is arranged parallel to the boom 1. When the boom 1 is inserted into the hanging hole 901 inside the prefabricated block 9, the bottom of the support leg 10 abuts against the surface of the prefabricated block 9. The provision of the support leg 10 can accurately limit the insertion depth of the boom 1, avoiding safety accidents such as tilting or falling of the prefabricated block 9 due to improper insertion depth of the boom 1. It is also beneficial to ensure the consistency of the installation position of the prefabricated blocks 9 during the construction of gravity-type block docks or dams, thereby improving the quality of the entire project.

[0062] In some embodiments, as Figure 6 As shown, the upper diameter of the lifting hole 901 is larger than the diameter of the lifting rod 1 and smaller than the length of the rotating block 3, while the lower diameter is larger than the length of the rotating block 3. Through the design of the diameter of the lifting hole 901 and in conjunction with the working principle of the sling, the setting of the upper diameter of the lifting hole 901 allows the lifting rod 1 to smoothly extend into the lifting hole 901, and the rotating block 3 can also smoothly pass through when it is in the retracted state; the lower diameter of the lifting hole 901 is larger than the length of the rotating block 3, which ensures that the rotating block 3 can be stably stuck in the lifting hole 901 when it is in the open state, providing reliable support for lifting the prefabricated block 9; this not only meets the needs of different stages during the lifting operation, but also ensures the stability of the connection between the rotating block 3 and the lifting hole 901.

[0063] In some embodiments, as Figure 1As shown, there are four suspenders 1 and four connecting rods 2, which are connected end to end, and a suspender 1 is installed at the connection between every two connecting rods 2. The installation of the four suspenders 1 and connecting rods 2 forms a stable frame system. The four connecting rods 2 and the suspenders 1 work together to evenly distribute the weight of the prefabricated blocks 9, improving the overall load-bearing capacity and stability of the sling. In addition, this regular structural layout can better resist interference from external forces, maintain the balance of the prefabricated blocks 9, and reduce the shaking or tilting of the prefabricated blocks 9 caused by uneven force, thereby improving the safety and accuracy of the lifting operation and facilitating installation, commissioning, and maintenance.

[0064] Example 1

[0065] In this embodiment, Figure 12 As shown, the adjustment member includes a driver 4 and a rocker arm 5. The driver 4 is fixed inside the boom 1. One end of the rocker arm 5 is hinged to the driver 4, and the other end is connected to the rotating block 3. The driver 4 is used to drive the rocker arm 5 to rotate around the hinge point, driving the rotating block 3 to rotate, so as to retract or unfold the rotating block 3. By driving the rocker arm 5 to rotate around the hinge point, the driver 4 can accurately drive the rotating block 3 to rotate, realizing the conversion of its retracted or unfolded state. Compared with other possible adjustment methods, this design based on the driver 4 and the rocker arm 5 makes the state adjustment of the rotating block 3 more flexible and efficient. The operator can accurately control the movement of the rotating block 3 according to the actual lifting requirements, thereby improving the accuracy and reliability of the connection and separation operations between the sling and the prefabricated block 9 during the lifting of the prefabricated block 9, and ensuring the safe and smooth progress of the lifting operation.

[0066] Furthermore, the driver 4 includes a cylinder, and the rocker arm 5 is connected to a hinge point of the cylinder.

[0067] Example 2

[0068] In this embodiment, Figure 5As shown, the adjusting member includes a traction member 6 and an elastic member; wherein, the interior of the boom 1 is hollow, the traction member 6 is arranged inside the boom 1, one end of which is connected to the second lifting hook 12, and the other end is connected to the rotating block 3, which is used to pull the rotating block 3 to be retracted; an elastic member is also provided in the through hole at the lower part of the boom 1, and the elastic member is elastically connected to the rotating block 3, which is used to release the elastic force to restore the rotating block 3 to the open state; when the rotating block 3 is in the retracted state, the elastic member is in a stretched state; when the rotating block 3 is in the open state, the elastic member is in a contracted state. The traction member 6 is arranged inside the hollow boom 1, with one end connected to the second lifting hook 12 and the other end connected to the rotating block 3. It can accurately pull the rotating block 3 to be retracted, realizing active control of the retraction action of the rotating block 3; and the elastic member in the through hole at the bottom of the boom 1 is elastically connected to the rotating block 3. After the traction member 6 is released, the rotating block 3 is restored to the open state by releasing the elastic force, and the elastic potential energy is cleverly used to realize the automatic resetting of the opening action of the rotating block 3; this design not only simplifies the operation process of adjusting the state of the rotating block 3, but also realizes the orderly coordination of the retraction and opening actions, and improves the efficiency and stability of the adjustment. During the hoisting process, the operator only needs to control the second lifting hook 12 to operate the traction member 6 to easily realize the conversion of the state of the rotating block 3, reducing the complex operation links, reducing the difficulty of operation, and effectively improving the safety and smoothness of the hoisting operation of the prefabricated block 9.

[0069] In some embodiments, as Figure 4 As shown, a limit rod 302 is provided inside the through hole to limit the rotation angle of the rotating block 3 when it is retracted. The provision of the limit rod 302 ensures that the rotating block 3 accurately reaches the preset retraction angle, avoiding interference between the rotating block 3 and the boom 1 or other components due to excessive rotation, or insufficient rotation angle to meet the lifting requirements.

[0070] In some embodiments, as Figure 3 As shown, the elastic member is a tension spring 7, one end of which is fixed to the bottom of the through hole, and the other end is connected to the rotating block 3. The tension spring 7 has good elastic properties and can effectively store elastic potential energy when the rotating block 3 is pulled up by the traction member 6. When the traction member 6 is released, the tension spring 7 can quickly and stably release the stored elastic potential energy, so that the rotating block 3 can quickly and accurately return to the open state. The elastic force of the tension spring 7 can be reasonably selected and adjusted according to the weight of the prefabricated block 9 and the actual lifting requirements to ensure that the rotating block 3 can smoothly complete the opening action under different working conditions.

[0071] Example 3

[0072] In this embodiment, Figure 5As shown, the adjusting member includes a traction member 6 and an elastic member; wherein, the interior of the boom 1 is hollow, the traction member 6 is arranged inside the boom 1, one end of which is connected to the second lifting hook 12, and the other end is connected to the rotating block 3, which is used to pull the rotating block 3 to be retracted; an elastic member is also provided in the through hole at the lower part of the boom 1, and the elastic member is elastically connected to the rotating block 3, which is used to release the elastic force to restore the rotating block 3 to the open state; when the rotating block 3 is in the retracted state, the elastic member is in a stretched state; when the rotating block 3 is in the open state, the elastic member is in a contracted state. The traction member 6 is arranged inside the hollow boom 1, with one end connected to the second lifting hook 12 and the other end connected to the rotating block 3. It can accurately pull the rotating block 3 to be retracted, realizing active control of the retraction action of the rotating block 3; and the elastic member in the through hole at the bottom of the boom 1 is elastically connected to the rotating block 3. After the traction member 6 is released, the rotating block 3 is restored to the open state by releasing the elastic force, and the elastic potential energy is cleverly used to realize the automatic resetting of the opening action of the rotating block 3; this design not only simplifies the operation process of adjusting the state of the rotating block 3, but also realizes the orderly coordination of the retraction and opening actions, and improves the efficiency and stability of the adjustment. During the hoisting process, the operator only needs to control the second lifting hook 12 to operate the traction member 6 to easily realize the conversion of the state of the rotating block 3, reducing the complex operation links, reducing the difficulty of operation, and effectively improving the safety and smoothness of the hoisting operation of the prefabricated block 9.

[0073] In some embodiments, as Figure 9 As shown, a limit rod 302 is provided inside the through hole to limit the rotation angle of the rotating block 3 when it is retracted. The provision of the limit rod 302 ensures that the rotating block 3 accurately reaches the preset retraction angle, avoiding interference between the rotating block 3 and the boom 1 or other components due to excessive rotation, or insufficient rotation angle to meet the lifting requirements.

[0074] In some embodiments, as Figure 7 、 Figure 8 As shown, the elastic member is a torsion spring 8, the spiral portion of the torsion spring 8 is wound around the limit rod 302, and the torsion arm of the torsion spring 8 is in contact with the rotating block 3. The torsion spring 8 has good torque characteristics and can effectively store torsional elastic potential energy when the rotating block 3 is pulled up by the traction member 6. When the traction member 6 is released, the torsion spring 8 quickly releases the stored energy and pushes the rotating block 3 to quickly return to the open state with a stable and precise torque. The torque size can be reasonably selected and adjusted according to the actual needs such as the weight of the prefabricated block 9 and the hoisting conditions to ensure that the rotating block 3 can successfully complete the opening action under different conditions. This elastic reset method based on the torsion spring 8 greatly enhances the overall performance of the sling and significantly improves the efficiency and safety of the hoisting operation of the prefabricated block 9.

[0075] The above-mentioned embodiment 1, embodiment 2 and embodiment 3 respectively provide three different adjustment member setting schemes, each of which can achieve the adjustment of the state of the rotating block 3.

[0076] Based on the above-mentioned sling for hoisting prefabricated blocks, the present invention further provides a hoisting method for hoisting prefabricated blocks. The hoisting method for hoisting prefabricated blocks is applied to the above-mentioned sling for hoisting prefabricated blocks, and comprises the following steps:

[0077] S1, use the adjustment member to adjust the rotating block 3 to the retracted state, connect the top of the boom 1 to the first lifting hook 11, lift the first lifting hook 11, and control the boom 1 to enter the lifting hole 901 of the prefabricated block 9;

[0078] S2, use the adjustment member to switch the rotating block 3 to the open state, and lift the first lifting hook 11, such as Figure 6 As shown, the rotating block 3 is clamped in the lifting hole 901, and the lifting rod 1 drives the prefabricated block 9 to be lifted to the preset position;

[0079] S3, lower the first lifting hook 11, use the adjustment member to switch the rotating block 3 to the retracted state, and lift the first lifting hook 11 again to make the lifting rod 1 leave the lifting hole 901.

[0080] In the above-mentioned exemplary embodiment, based on the sling for lifting prefabricated blocks in the embodiment of the present application, the lifting method in this embodiment flexibly switches the state of the rotating block 3 through the adjusting member, which plays a key role in different lifting stages: the retracted state facilitates the smooth entry and exit of the lifting rod 1 in the lifting hole 901, while the open state ensures that the rotating block 3 is firmly stuck in the lifting hole 901 to stably lift the prefabricated block 9. This precise control of the state of the rotating block 3 ensures that the prefabricated block 9 can be reliably connected to the sling during the lifting process, making it less likely to fall off or other safety accidents; when the lifting rod 1 is separated from the lifting hole 901, it can also avoid collisions or damage caused by the rotating block 3 not being retracted in time.

[0081] The following describes the hoisting methods of each embodiment according to the different structures of embodiment 1, embodiment 2, and embodiment 3:

[0082] In Example 1, the method for switching the state of the rotating block 3 using the adjustment member includes: using the driver 4 to drive the swing arm 5 to rotate, thereby driving the rotating block 3 to rotate, thereby retracting or unfolding the rotating block 3. The driver 4 precisely controls the rotation amplitude of the swing arm 5, thereby accurately adjusting the rotation angle of the rotating block 3, ensuring that the rotating block 3 can reliably engage the lifting hole 901 of the prefabricated block 9 under different working conditions, improving the stability and reliability of the connection between the lifting device and the prefabricated block 9 during the lifting process, and ensuring safe and efficient lifting operations.

[0083] In Example 2, the method of switching the state of the rotating block 3 using the adjustment member includes: connecting the pulling member 6 to the second lifting hook 12, lifting the second lifting hook 12, causing the rotating block 3 to rotate upward and retract along with the pulling member 6, while the tension spring 7 is stretched and charged; and releasing the second lifting hook 12, causing the rotating block 3 to return to the open state under the elastic force of the tension spring 7. Switching the state of the rotating block 3 by cooperating with the pulling member 6 and the tension spring 7 is intuitive and easy to understand. Furthermore, the tension spring 7 smoothly accumulates and releases force, effectively cushioning the movement of the rotating block 3 and reducing the impact on the spreader and prefabricated block 9.

[0084] In Example 3, the method of switching the state of the rotating block 3 using the adjusting member includes: connecting the traction member 6 to the second lifting hook 12, lifting the second lifting hook 12, and the rotating block 3 rotating upward and retracting with the traction member 6, while the torsion spring 8 stretches and stores force; releasing the second lifting hook 12, and the rotating block 3 returns to the open state under the elastic force of the torsion spring 8. The state of the rotating block 3 is switched by cooperating with the traction member 6 and the torsion spring 8, and the unique torque characteristics of the torsion spring 8 are utilized to provide efficient and stable power for the state switching of the rotating block 3; the torsion spring 8 responds quickly and can quickly restore the rotating block 3 to the open state, which helps to improve the lifting efficiency; at the same time, its compact structural design facilitates installation and arrangement inside the boom 1, does not take up too much space, makes the sling structure more compact and reasonable, and is conducive to actual lifting operations.

[0085] Through the description of multiple embodiments of the hoisting method and the hoisting device for hoisting prefabricated blocks of the present invention, it can be seen that the hoisting method and the hoisting device for hoisting prefabricated blocks of the present invention have at least one or more of the following advantages:

[0086] 1. The lifting device for lifting prefabricated blocks provided by the present invention has a rotating block 3 provided at the lower part of the lifting rod 1, so that the lifting rod 1 can be firmly clamped in the lifting hole 901 of the prefabricated block 9, ensuring that the prefabricated block 9 can be lifted more quickly and will not deviate during the lifting and placement process;

[0087] 2. The lifting device for lifting prefabricated blocks provided by the present invention can quickly switch the rotating block 3 between the open state and the retracted state through the setting of the adjustment member, thereby quickly completing the lifting, positioning and installation operations of the prefabricated block 9, greatly improving the lifting efficiency of the prefabricated block 9;

[0088] 3. The lifting device for lifting prefabricated blocks provided by the present invention has a simple structure and is easy to operate. It does not require complicated adjustment and monitoring equipment, reduces the requirements on the technical level of the operator, and can effectively reduce construction costs.

[0089] 4. The lifting method for prefabricated blocks provided by the present invention can accurately control the state of the rotating block 3, so that during the lifting process, the prefabricated block 9 can be reliably connected to the lifting device, and it is not easy to cause safety accidents such as falling off; when the lifting rod 1 is separated from the lifting hole 901, it can also avoid collision or damage caused by the rotating block 3 not being retracted in time. The accurate control of the state of the rotating block 3 can ensure that during the lifting process, the prefabricated block 9 can be reliably connected to the lifting device, and it is not easy to cause safety accidents such as falling off; when the lifting rod 1 is separated from the lifting hole 901, it can also avoid collision or damage caused by the rotating block 3 not being retracted in time.

[0090] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons skilled in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should fall within the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A method for hoisting prefabricated blocks, characterized in that: The following steps are involved: S1, using the adjusting member to adjust the rotating block at the bottom of the boom to the retracted state, connecting the top of the boom to the first lifting hook, lifting the first lifting hook, and controlling the boom to enter the lifting hole of the prefabricated block; S2, using the adjustment member to switch the rotating block to the open state, lift the first lifting hook so that the rotating block is stuck in the lifting hole, and the lifting rod drives the prefabricated block to the preset position; S3, lower the first lifting hook, use the adjustment member to switch the rotating block to the retracted state, and lift the first lifting hook again to make the boom leave the lifting hole.

2. The method for hoisting prefabricated blocks according to claim 1, wherein: The method of switching the state of the rotating block by using the adjusting member includes: using a driver arranged inside the suspension rod to drive the swing arm to rotate, and the swing arm drives the rotating block to rotate to retract or open the rotating block.

3. The method for hoisting prefabricated blocks according to claim 1, wherein: The method of switching the state of the rotating block using an adjusting piece includes: connecting a traction piece arranged inside the boom to a second lifting hook, lifting the second lifting hook, and causing the rotating block to rotate upward and retract along with the traction piece, while at the same time, an elastic piece arranged at the lower part of the boom and in contact with the rotating block is stretched and stores force; releasing the second lifting hook, and causing the rotating block to return to an open state under the elastic force of the elastic piece.

4. A lifting device for lifting prefabricated blocks, characterized in that: The method for hoisting prefabricated blocks according to any one of claims 1 to 3 comprises: A suspender rod, wherein at least one suspender rod is provided, the top of the suspender rod is used to connect to the first lifting hook, and the lower part of the suspender rod is used to extend into the lifting hole inside the prefabricated block to lift the prefabricated block; A connecting rod is installed between adjacent booms and is used to connect the booms; The rotating block has a through hole at the bottom of the boom, and the rotating block is installed in the through hole and is rotatably connected to the boom; the rotating block includes an open state and a retracted state. When the rotating block is in the retracted state, the boom can be extended into the hanging hole; when the rotating block is in the open state, the rotating block is clamped in the hanging hole to lift the prefabricated block; The adjusting piece is hollow inside the boom, and the adjusting piece is arranged inside the boom and connected to the rotating block for adjusting the state of the rotating block.

5. The lifting device for lifting prefabricated blocks according to claim 4, characterized in that: The adjusting part includes a driver and a rocker arm. The driver is fixed inside the boom. One end of the rocker arm is hinged to the driver, and the other end is connected to the rotating block. The driver is used to drive the rocker arm to rotate around the hinge point, driving the rotating block to rotate to retract or open the rotating block.

6. The lifting device for lifting prefabricated blocks according to claim 4, characterized in that: Adjustment parts include: The traction member is hollow inside the boom and is arranged inside the boom, one end of which is connected to the second lifting hook and the other end is connected to the rotating block, and is used to pull the rotating block to retract; An elastic member is also provided in the through hole at the lower part of the boom, and the elastic member is elastically connected to the rotating block, and is used to release the elastic force to restore the rotating block to the open state; when the rotating block is in the retracted state, the elastic member is in the stretched state; when the rotating block is in the open state, the elastic member is in the contracted state.

7. The lifting device for lifting prefabricated blocks according to claim 6, characterized in that: A limiting rod is provided inside the through hole, and the limiting rod is used to limit the rotation angle of the rotating block when it is retracted.

8. The lifting device for lifting prefabricated blocks according to claim 7, characterized in that: The elastic member is a tension spring, one end of which is fixed to the bottom of the through hole, and the other end is connected to the rotating block.

9. The lifting device for lifting prefabricated blocks according to claim 7, characterized in that: The elastic member is a torsion spring, a spiral portion of the torsion spring is wound around the limiting rod, and a torsion arm of the torsion spring is in contact with the rotating block.

10. The lifting device for lifting prefabricated blocks according to claim 6, characterized in that: The traction member includes a traction rope, an opening is provided on the top of the boom, and a rope hole is provided on the rotating block for passing the traction rope. One end of the traction rope is connected to the second lifting hook, and the other end is connected to the rotating block through the opening and the rope hole.

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