A large-diameter pile foundation reinforcement cage hoisting device and a method of using the same

Abstract

This invention relates to the field of lifting and hoisting technology, and in particular to a hoisting device for large-diameter pile foundation steel cages and its method of use. The device includes: a load-bearing beam, with at least two beams arranged in a cross pattern; a load-bearing structure located at the connection position at the end of the load-bearing beam, having space for the rope to pass through; a guide structure, corresponding to the load-bearing structure, including a guide wheel facing the steel cage; the load-bearing structure includes a limiting wheel and a stop wheel, the limiting wheel being rotatably connected to the load-bearing beam, and the distance between the stop wheel and the limiting wheel being adjustable; the rope passes through the gap between the stop wheel and the limiting wheel and wraps around the guide wheel on the corresponding side; based on the gravity of the steel cage, the rope is pulled to wrap around and tighten towards the limiting wheel, and the stop wheel and the limiting wheel form a clamping and limiting effect on the rope; improving the operational safety and convenience of hoisting steel cages with large main reinforcement specifications and heavy single sections.

Description

Technical Field

[0001] This invention relates to the field of lifting and hoisting technology, and in particular to a hoisting device for large-diameter pile foundation steel cages and its usage method. Background Technology

[0002] During the construction of large bridges, if the lifting action is carried out by directly binding the end of the steel cage with steel wire ropes, the steel wire ropes will form an angle of less than 90° due to the force. The angled force at the lifting point will generate horizontal tension, and the magnitude of the tension will increase with the weight of the steel cage. This can easily cause the lifting point to bear excessive tension, resulting in the welding of the lifting point breaking or fracture, thus causing the steel cage to disintegrate and causing a safety accident.

[0003] To address the aforementioned issues, related technologies typically employ a cross beam or similar load-bearing frame as the primary load-bearing component, using wire ropes to connect the crane hook to the reinforcing cage. For instance, Chinese invention patent application CN117023345A discloses a lifting device suitable for bored pile reinforcing cages of different diameters, comprising a cross beam, lifting lugs, shackles, an upper wire rope, a lower wire rope, and a sliding device. The upper wire rope is connected to the lifting lugs on the cross beam via shackles, and the lower wire rope is connected to the sliding device via shackles, thereby forming multiple rope end termination connection points on the cross beam. Furthermore, to accommodate reinforcing cages of different diameters, multiple holes need to be drilled in the web of the cross beam to install the sliding device.

[0004] In the above technology, although the load-bearing components solve the problem of horizontal force caused by the lifting angle, the four steel wire ropes will be broken into upper and lower parts connected to the load-bearing frame. Each connection point involves shackle pin connection and lifting lug weld, etc. As we all know, the more connection points there are, the more risk points there are. Under the long-term working condition of repeatedly bearing the impact load of lifting, each connection part has the hidden danger of wear, loosening and fatigue cracking, which constitutes multiple potential failure risk points. In addition, before each lifting operation, the shackle and other connecting parts need to be manually installed and removed one by one, which is cumbersome. In addition, to meet the hoisting requirements of steel cages of different diameters, multiple through holes are usually drilled at equal intervals on the web or flange of the cross beam to install the sliding device or to select different connection hole positions. These holes further aggravate the weakening of the load-bearing frame section, and stress concentration is also likely to occur in the hole edge area.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the present invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a hoisting device for large-diameter pile foundation steel cages and its usage method, so as to improve the operational safety and convenience of hoisting steel cages with large main reinforcement specifications and heavy single section weight.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a large-diameter pile foundation steel cage hoisting device, comprising: The load-bearing beams must consist of at least two intersecting beams. The load-bearing structure, located at the connection position at the end of the load-bearing beam, has space for the rope to pass through; The guide structure, corresponding to the load-bearing structure, includes guide wheels positioned on the side facing the reinforcing cage; The load-bearing structure includes a limiting wheel and a stop wheel. The limiting wheel is rotatably connected to the load-bearing beam, and the distance between the stop wheel and the limiting wheel is adjustable. The rope passes through the gap between the stop wheel and the limit wheel and wraps around the guide wheel on the corresponding side; The rope is pulled by the gravity of the steel cage to wrap around and tighten towards the limiting wheel, and the stop wheel and the limiting wheel form a clamping and limiting effect on the rope.

[0008] Furthermore, a pair of limiting wheels are arranged side by side in the vertical direction, and the axis of the stop wheel is located between the two horizontal planes where the axis of the limiting wheel is located; The stop wheel moves toward the limit wheel to clamp the rope, and the rope bends and deforms into an S-shape, and is limited by friction with the groove structure of the stop wheel and the limit wheel.

[0009] Furthermore, the load-bearing structure includes a fixed seat and a movable seat. The fixed seat is fixedly connected to the end of the load-bearing beam, the limiting wheel is rotatably connected to the fixed seat, the stop wheel is fixedly connected to the movable seat, and the distance between the movable seat and the fixed seat is adjustable.

[0010] Furthermore, the movable seat is a U-shaped structure with an opening on one side, the stop wheel is fixedly connected to the open end, and an adjusting component is provided at the closed end. The adjusting component is threadedly connected to the adjusting shaft at the closed end. A fixing plate is provided between the adjusting member and the closed end of the movable seat. A guide post is provided on the side of the fixing plate facing the movable seat. The guide post passes through the movable seat and is fixedly connected to the fixing seat. Rotate the adjusting member to move the movable seat between the fixed plate and the movable fixed seat along the axial direction of the guide post, thereby changing the distance between the stop wheel and the limit wheel.

[0011] Furthermore, the guide structure includes an adapter body, the inner cavity of which is shaped to the cross-section of the supporting beam and is detachably fitted onto the supporting beam, and the guide wheel is rotatably connected to the adapter body.

[0012] Furthermore, the adapter body has several locking holes, through which fasteners pass and abut against and lock onto the outside of the load-bearing beam.

[0013] Furthermore, a pull plate is provided on the outside of the adapter body. The pull plate is arranged in the same direction as the bearing beam and has several adjustment holes along the length direction. Fasteners pass through the adjustment hole and the locking hole and lock them together. One end of the pull plate forms a clamping action with the end of the load-bearing structure based on the weight of the steel cage on the guide wheel.

[0014] Furthermore, the adapter body is provided with auxiliary wheels, which are symmetrically distributed with respect to the bearing beam along with the guide wheels; The rope is wrapped around the outside of the auxiliary wheel, passes through the gap between the stop wheel and the limit wheel, and symmetrically wraps around the guide wheel.

[0015] The present invention also provides a method for using a large-diameter pile foundation steel cage hoisting device, comprising the following steps: Adjust and fix the relative position of the guide structure and the load-bearing beam so that the spacing between the guide wheels matches the radial dimension of the steel cage; The rope passes through the gap between the stop wheel and the limit wheel and wraps around the guide wheel; Repeat the above steps until each rope is wrapped around the corresponding load-bearing structure and guide structure; The rope is pulled by the gravity of the steel cage to wrap around and tighten towards the limit wheel. The stop wheel and the limit wheel form a clamping and limiting effect on the rope. The top starting end of each rope is assembled, and the assembly end is hoisted using a crane.

[0016] Furthermore, this includes the following steps: The relative position of the guide structure and the load-bearing beam is adjusted and fixed by a tie plate. One end of the tie plate forms a clamping action with the end of the load-bearing structure so that the spacing between the guide wheels matches the radial dimension of the steel cage. The rope is wrapped around the outside of the auxiliary wheel, passes through the gap between the stop wheel and the limit wheel, and is symmetrically wrapped around the guide wheel; Repeat the above steps until each rope is wrapped around the corresponding load-bearing structure and guide structure; Based on the gravity of the steel cage and the guiding effect of the auxiliary wheel and the guide wheel, the rope wraps around and is symmetrically tightened towards the side of the limiting wheel, and the stop wheel and the limiting wheel form a clamping and limiting effect on the rope. The top starting end of each rope is assembled, and the assembly end is hoisted using a crane.

[0017] The beneficial effects of this invention are as follows: Through the cooperation of the load-bearing beam, the load-bearing structure, and the guiding structure, the rope extends continuously from the crane hook to the lifting point of the rebar cage. At the end of the load-bearing beam, it only passes through the gap formed by the limiting wheel and the stop wheel and changes direction. The rope is continuous from beginning to end, ensuring the integrity of the rope from the lifting point to the lifting point of the rebar cage. There is no need to install shackles, lifting lugs, or other rope end connectors on the load-bearing beam, which solves the problem of multiple rope end connection points at the load-bearing beam in existing hoisting devices, avoids multiple potential sources of failure, and achieves the effect of zero rope end connection points at the load-bearing beam, reducing connection safety hazards. At the same time, when it is necessary to adapt to rebar cages of different diameters, it is only necessary to change the relative position of the guiding structure and the load-bearing beam, without drilling additional holes in the load-bearing beam, thus avoiding weakening the structural strength of the load-bearing beam. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the large-diameter pile foundation steel cage hoisting device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the steel cage hoisting in an embodiment of the present invention; Figure 3 This is a side view of the large-diameter pile foundation steel cage hoisting device in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the positions of the load-bearing structure and the guiding structure in an embodiment of the present invention; Figure 5 This is a schematic diagram of the load-bearing structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the rope wrapping and clamping position in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a large-diameter pile foundation steel cage hoisting device in another embodiment of the present invention; Figure 8 This is a schematic diagram showing the positions of the load-bearing structure and the guiding structure in another embodiment of the present invention; Figure 9 This is a schematic diagram of the rope wrapping and clamping position in another embodiment of the present invention; Figure 10This is a flowchart illustrating the method of using the large-diameter pile foundation steel cage hoisting device in an embodiment of the present invention; Figure 11 This is a flowchart illustrating the method of using a large-diameter pile foundation steel cage hoisting device in another embodiment of the present invention.

[0020] Reference numerals: 01, Reinforcing cage; 02, Rope; 10, Bearing beam; 20, Load-bearing structure; 21, Limiting wheel; 22, Stopping wheel; 23, Fixed seat; 24, Movable seat; 25, Adjusting component; 26, Adjusting shaft; 27, Fixed plate; 28, Guide column; 29, Reinforcing block; 30, Guide structure; 31, Guide wheel; 32, Adapter seat; 32a, Locking hole; 33, Pull plate; 33a, Adjusting hole; 34, Auxiliary wheel. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figures 1 to 6 The large-diameter pile foundation reinforcement cage hoisting device shown includes: The load-bearing beam 10 shall have at least two intersecting beams; The load-bearing structure 20 is located at the connection position at the end of the load-bearing beam 10 and has space for the rope 02 to pass through; The guide structure 30 is provided corresponding to the load-bearing structure 20, including a guide wheel 31 provided on the side facing the steel cage 01; The load-bearing structure 20 includes a limiting wheel 21 and a stop wheel 22. The limiting wheel 21 is rotatably connected to the load-bearing beam 10, and the distance between the stop wheel 22 and the limiting wheel 21 can be adjusted. The rope 02 passes through the gap between the self-stopping wheel 22 and the limiting wheel 21 and wraps around the guide wheel 31 on the corresponding side; The rope 02 is pulled by the gravity of the steel cage 01, so that it wraps around and tightens towards the limiting wheel 21. The stop wheel 22 and the limiting wheel 21 form a clamping and limiting effect on the rope 02.

[0025] This invention utilizes the cooperation of the load-bearing beam 10, the load-bearing structure 20, and the guide structure 30 to ensure that the rope 02 extends continuously from the crane hook to the lifting point of the rebar cage 01. At the end of the load-bearing beam 10, the rope 02 passes through the gap formed by the limiting wheel 21 and the stop wheel 22 and changes direction. The rope 02 remains continuous from start to finish, ensuring its integrity from the lifting point to the rebar cage lifting point. This eliminates the need for shackles, lifting lugs, or other rope end connectors on the load-bearing beam 10, solving the problem of multiple rope end connection points on the load-bearing beam 10 in existing lifting devices. This avoids multiple potential sources of failure and achieves a zero rope end connection point on the load-bearing beam 10, reducing connection safety hazards. Furthermore, when adapting to rebar cages 01 of different diameters, only the relative position of the guide structure 30 and the load-bearing beam 10 needs to be changed, eliminating the need for additional drilling holes in the load-bearing beam 10 and preventing any weakening of its structural strength.

[0026] Specifically, the load-bearing beam 10 has at least two intersecting sections. As an optional implementation, the load-bearing beam 10 can be constructed by welding two steel sections together in a cross-shaped arrangement to form a cross beam structure, with the intersection angle of the two steel sections being 90°. In other implementations, the load-bearing beam 10 can also be constructed by welding three steel sections together in a star-shaped arrangement, with equal angles between each steel section to provide more options for the distribution of lifting points. Of course, the load-bearing beam 10 can also be constructed by arranging two or more steel sections in a non-equiangular intersection to meet different requirements for the location of lifting points in specific construction scenarios. As a preferred method, the load-bearing beam 10 structure with two steel sections welded together in a cross-shaped arrangement is preferred. This structure is symmetrical and has balanced stress, is easy to manufacture, and has good compatibility with the four symmetrical lifting points of the reinforcing cage 01. The steel material of the load-bearing beam 10 can be channel steel, I-beam, or H-beam to provide sufficient bending and compressive strength.

[0027] During the specific operation, the rope 02 passes through the gap between the stop wheel 22 and the limit wheel 21 and wraps around the guide wheel 31 on the corresponding side. The guide wheel 31 is used to change the position of the rope 02 as it descends on the load-bearing beam 10, so as to facilitate the lifting of steel cages of different diameters. The crane hook applies an upward lifting force through the rope 02, and the weight of the steel cage 01 is transmitted downward through the rope 02. When the rope 02 passes through the load-bearing structure 20, it is pulled by the weight of the steel cage 01, so that the rope 02 wraps around and tightens towards the limit wheel 21. Then, the stop wheel 22 and the limit wheel 21 together form a clamping and limiting effect on the rope 02. The rope 02 is reliably locked at the load-bearing structure 20 and will not slip relative to the load-bearing beam 10.

[0028] Based on the above embodiment, a pair of limit wheels 21 are arranged side by side in the vertical direction, and the axis of the stop wheel 22 is located between the two horizontal planes where the axis of the limit wheel 21 is located. The stop wheel 22 moves toward the limit wheel 21 to clamp the rope 02. The rope 02 bends and deforms into an S-shape, and is limited by friction with the groove structure of the stop wheel 22 and the limit wheel 21.

[0029] Specifically, in the assembled state, the rope 02 passes between a pair of limiting wheels 21, goes around the stop wheel 22, and then passes out between a pair of limiting wheels 21. Under the joint compression of the stop wheel 22 and the limiting wheel 21, it bends and deforms into an S-shape. The outer periphery of the stop wheel 22 and the limiting wheel 21 are provided with groove structures. The rope 02 and the groove structures are fixed in position by friction.

[0030] During the lifting process, as the weight of the steel cage 01 increases, the tension force on the rope 02 also increases. The reaction force of the rope 02 on the stop wheel 22 increases in the S-shaped bending path, thereby further increasing the friction and further enhancing the clamping and limiting effect, making the locking of the rope 02 more reliable.

[0031] Based on the above embodiments, the load-bearing structure 20 includes a fixed seat 23 and a movable seat 24. The fixed seat 23 is fixedly connected to the end of the load-bearing beam 10, the limiting wheel 21 is rotatably connected to the fixed seat 23, the stop wheel 22 is fixedly connected to the movable seat 24, and the distance between the movable seat 24 and the fixed seat 23 can be adjusted.

[0032] Specifically, the fixing seat 23 is fixedly connected to the end of the bearing beam 10. The fixing seat 23 can be fixedly connected to the end of the bearing beam 10 by means of bolts or clamps, or it can be fixedly connected to the end face of the steel section of the bearing beam 10 by welding. Of course, other connection methods that can reliably fix the fixing seat 23 to the end of the bearing beam 10 are also within the protection scope of this invention, and are not specifically limited here.

[0033] By setting the limiting wheel 21 and the stop wheel 22 on the fixed seat 23 and the movable seat 24 respectively, and setting the distance between the movable seat 24 and the fixed seat 23 to be adjustable, the gap between the stop wheel 22 and the limiting wheel 21 can be changed simply by adjusting the position of the movable seat 24 relative to the fixed seat 23, thereby adapting to most diameter ropes 02 or adjusting the clamping tightness, and the adjustment operation is convenient.

[0034] Based on the above embodiments, the movable seat 24 is a U-shaped structure with one side open, the stop wheel 22 is fixedly connected to the open end, and the closed end is provided with an adjusting member 25, which is threadedly sleeved on the adjusting shaft 26 of the closed end. A fixing plate 27 is provided between the adjusting member 25 and the closed end of the movable seat 24. The adjusting member 25 is rotatably connected to the fixing plate 27. A guide post 28 is provided on the side of the fixing plate 27 facing the movable seat 24. The guide post 28 passes through the movable seat 24 and is fixedly connected to the fixing seat 23. Rotate the adjusting member 25 so that the movable seat 24 moves between the fixed plate 27 and the movable fixed seat 23 along the axial direction of the guide column 28, thereby changing the distance between the stop wheel 22 and the limit wheel 21.

[0035] Specifically, during the actual adjustment process, rotating the adjusting component 25 causes it to rotate on the adjusting shaft 26, pushing the adjusting shaft 26 and the movable seat 24 to move along the axis of the guide column 28. Since the guide column 28 is fixedly connected to the fixed seat 23, the adjusting component 25 and the fixed plate 27 remain stationary. Under the thrust of the adjusting shaft 26, the movable seat 24 moves between the fixed plate 27 and the fixed seat 23 along the axis of the guide column 28, thereby changing the distance between the stop wheel 22 and the limit wheel 21. This adjustment method utilizes the threaded propulsion principle, resulting in high adjustment accuracy and effortless operation. Furthermore, after adjustment, the adjusting component 25 has a self-locking characteristic, preventing loosening due to vibration.

[0036] Based on the above embodiments, the guide structure 30 includes a transition seat 32, the inner cavity of which is shaped to the cross section of the supporting beam 10 and can be detachably sleeved on the supporting beam 10. The guide wheel 31 is rotatably connected to the transition seat 32.

[0037] Specifically, the inner cavity of the adapter seat 32 forms a clearance fit or transition fit with the outer section of the bearing beam 10, which facilitates the adjustment of the position by sliding along the length of the bearing beam 10 and then tightening it.

[0038] By using a detachable adapter body 32, the installation position of the guide wheels 31 on the bearing beam 10 can be adjusted along the length of the bearing beam 10, thereby changing the horizontal spacing between each guide wheel 31 to match the diameter of the steel cage 01 to be hoisted. When it is necessary to hoist steel cages 01 of different diameters, it is only necessary to loosen the fasteners of the adapter body 32, slide the adapter body 32 to the corresponding position, and then tighten it again to complete the adjustment of the spacing of the guide wheels 31. There is no need to drill multiple fixed holes on the bearing beam 10, avoiding the existing hoisting tools that require drilling multiple through holes on the bearing beam 10 for different diameters, which would weaken the strength of the beam.

[0039] Based on the above embodiments, the adapter body 32 has a plurality of locking holes 32a, and the fasteners pass through the locking holes 32a and abut against and lock to the outside of the bearing beam 10.

[0040] A fastening method is provided between the adapter body 32 and the bearing beam 10. Specifically, when the fastener is installed in the locking holes 32a distributed on both sides of the adapter body 32, the end of the fastener abuts against the side of the bearing beam 10. After the two sides are tightened, a counteracting clamping force is formed, thereby restricting the relative displacement between the adapter body 32 and the bearing beam 10, and forming a locking and fixing effect.

[0041] In addition, to adjust the clamping force, different numbers and positions of locking holes 32a can be selected for fixing. For example, two, four or six sets of symmetrically distributed locking holes 32a can be selected and fasteners can be installed accordingly, thereby increasing the reliability of the positioning and fastening of the guide wheel 31. Preferably, the fastener is a fastening screw, which is threaded into the locking hole 32a to form an abutment against the side of the load-bearing beam 10.

[0042] like Figures 7 to 9 As shown, based on the above embodiments, another form of fastening between the adapter body 32 and the bearing beam 10 is provided. Specifically, the adapter body 32 is provided with a pull plate 33 on the outside. The pull plate 33 is arranged in the same direction as the bearing beam 10 and has a number of adjustment holes 33a along the length direction. Fasteners pass through adjustment hole 33a and locking hole 32a and lock them together. One end of pull plate 33 forms a clamping action with the end of load-bearing structure 20 based on the gravity of steel cage 01 on guide wheel 31.

[0043] By setting a detachable and adjustable pull plate 33, different holes on the pull plate 33 can be connected by fastening bolts, thereby changing the distance between the adapter body 32 and the load-bearing structure 20. There is no need to open adjustment holes on the load-bearing beam 10, ensuring structural strength. Moreover, compared with the screw connection in the above embodiment, the stability after adjustment is stronger, avoiding slippage caused by screw connection. During hoisting operations, the guide wheel 31 bears the downward pull from the steel cage 01. This force is transmitted to the adapter body 32 through the wheel axle of the guide wheel 31, and then transmitted along the axial direction of the load-bearing beam 10 through the pull plate 33. One end of the pull plate 33 forms a tight fit with the end of the load-bearing structure 20, converting the downward pull on the guide wheel 31 into an axial thrust on the load-bearing structure 20. This thrust can further ensure that the adapter body 32 remains stationary, thereby ensuring the stability of the adapter body 32 after the position is adjusted.

[0044] Preferably, the load-bearing structure 20 has a reinforcing block 29, which is fixed to the horizontal plate at the center of the fixing seat 23. The reinforcing block 29 is embedded in the cavity of the load-bearing beam 10 and is connected to the load-bearing beam 10 as a whole. Since the load-bearing beam 10 is made of profiles with hollow cross sections such as channel steel, after the load-bearing structure 20 is installed, the ends of the beam are prone to bending and local compressive loads, which may lead to the risk of local buckling or crushing of the steel wall panel. Reinforcing blocks 29 are set to fill the cavity of the steel in this area to provide internal support for the steel wall panel, enhance the local compressive and deformation resistance of the ends of the load-bearing beam 10 at the installation position of the load-bearing structure 20, and improve the stress state of the ends of the load-bearing beam 10. In this embodiment, four fastening bolts are inserted through the fixing seat 23, the bearing beam 10 and the reinforcing block 29 and locked, so that the three are fixed as one. After locking, the bearing beam 10 is squeezed and clamped on both sides of the reinforcing block 29, which further improves the connection stability and prevents the end of the bearing beam 10 from deforming.

[0045] Based on the above embodiments, the adapter body 32 is provided with auxiliary wheels 34, and the auxiliary wheels 34 and guide wheels 31 are symmetrically distributed with respect to the load-bearing beam 10; The rope 02 is wrapped around the outside of the auxiliary wheel 34, passes through the gap between the stop wheel 22 and the limit wheel 21, and is symmetrically wrapped around the guide wheel 31.

[0046] Specifically, the rope 02 is wrapped around the outside of the auxiliary wheel 34, passes through the gap between the stop wheel 22 and the limit wheel 21, and continues to extend and symmetrically wrap around the guide wheel 31. The auxiliary wheel 34 and the guide wheel 31 are respectively located on both sides of the bearing beam 10 and are subjected to force.

[0047] During the lifting process, the auxiliary wheel 34 and the guide wheel 31 are symmetrically arranged, which makes the forces on both sides of the adapter body 32 balanced, avoiding deformation of the adapter body 32 caused by long-term unilateral force, improving the structural durability of the adapter body 32 in long-term use under stress, and further ensuring that the pull plate 33 and the end of the load-bearing structure 20 form a tight fit.

[0048] like Figure 10 As shown, the present invention also provides a method for using a hoisting device for a large-diameter pile foundation steel cage 01, comprising the following steps: Adjust and fix the relative position of the guide structure 30 and the bearing beam 10 so that the spacing between the guide wheels 31 matches the radial dimension of the steel cage 01; During operation, according to the diameter specifications of the steel cage 01, each transition seat 32 is slid along the length of the bearing beam 10 to the target position, so that the spacing between the relatively set guide wheels 31 is consistent with the distribution spacing of the symmetrical lifting points on the steel cage 01. Then, each transition seat 32 is locked and fixed to the bearing beam 10 by fasteners to complete the preset spacing of the guide wheels 31. The rope 02 passes through the gap between the stop wheel 22 and the limit wheel 21 and wraps around the guide wheel 31; When the rope 02 is threaded, it is first inserted from above between a pair of limiting wheels 21, passes around the stop wheel 22 and then passes out between the limiting wheels 21. The rope 02 forms an S-shaped bending path under the joint constraint of the stop wheel 22 and the limiting wheel 21. Then the rope 02 extends below the bearing beam 10, passes around the guide wheel 31 and is led out. The bottom end of the rope 02 is fixed to the corresponding lifting point of the steel cage 01 by binding, hooking or shackle connection. Furthermore, markings are made at the same position on several ropes 02 to facilitate the fixing of the stop wheel 22 and the limit wheel 21 at the marked position, thereby ensuring that the load-bearing beam 10 remains horizontal when it is lifted. Repeat the above steps until each rope 02 is wrapped around the corresponding load-bearing structure 20 and guide structure 30; and the bottom end of each rope 02 is connected to the symmetrical lifting points of the steel cage 01 respectively. The weight of the steel cage 01 causes the rope 02 to be pulled and wrapped around the limiting wheel 21 and tightened. The stop wheel 22 and the limiting wheel 21 form a clamping and limiting effect on the rope 02. The weight of the steel cage 01 pulls the rope 02 downward through the bottom end of each rope 02. The rope 02 is wrapped and tightened towards the limiting wheel 21 at the load-bearing structure 20. The stop wheel 22 and the limiting wheel 21 form a clamping and limiting effect on the rope 02.

[0049] The top starting end of each rope 02 is assembled, and the assembly end is hoisted by a crane.

[0050] In the above method, the spacing of the guide wheels 31 can be adjusted and fixed simply by sliding the adapter body 32, without drilling multiple holes in the bearing beam 10 or replacing the lifting accessories. This allows the same lifting device to be quickly adapted to steel cages 01 of various diameters. Furthermore, the rope 02 passes through the gap between the limit wheel 21 and the stop wheel 22 at the load-bearing structure 20, without involving the installation and removal of rope end termination connectors such as shackles and lifting lugs. This simplifies the preparation process before lifting and reduces the risk of human error.

[0051] Based on the above embodiments, such as Figure 11 The method of using the large-diameter pile foundation reinforcement cage 01 hoisting device shown includes the following steps: The relative position of the guide structure 30 and the bearing beam 10 is adjusted and fixed by the pull plate 33. One end of the pull plate 33 forms a pressing action with the end of the bearing structure 20 so that the spacing between the guide wheels 31 matches the radial dimension of the steel cage 01. During operation, according to the diameter specifications of the reinforcing cage 01, each transition seat 32 is slidably adjusted to the target position along the bearing beam 10. Then, the pull plate 33 is placed on the outside of the transition seat 32 along the length direction of the bearing beam 10, so that the adjustment hole 33a on the pull plate 33 is aligned with the locking hole 32a on the transition seat 32. Then, the fasteners are passed through the adjustment hole 33a and the locking hole 32a in sequence and tightened to complete the integrated locking and fixing of the transition seat 32 and the pull plate 33. After locking, the end face of the pull plate 33 near the load-bearing structure 20 forms a tight fit with the end of the load-bearing structure 20. The rope 02 is wrapped around the outside of the auxiliary wheel 34, passes through the gap between the stop wheel 22 and the limit wheel 21, and is symmetrically wrapped around the guide wheel 31; During the threading process of rope 02, rope 02 completes the first turning transition on the side of auxiliary wheel 34 and the second turning on the side of guide wheel 31. Auxiliary wheel 34 and guide wheel 31 are arranged symmetrically with the load-bearing beam 10 as the axis. Repeat the above steps until each rope 02 is wrapped around the corresponding load-bearing structure 20 and guide structure 30; and the bottom end of each rope 02 is connected to the symmetrical lifting points of the steel cage 01 respectively. Based on the gravity of the steel cage 01 and the guiding effect of the auxiliary wheel 34 and the guide wheel 31, the rope 02 is wrapped around and symmetrically tightened towards the limiting wheel 21. The stop wheel 22 and the limiting wheel 21 form a clamping and limiting effect on the rope 02. Due to the symmetrical layout of the auxiliary wheel 34 and the guide wheel 31, the tension components of the rope 02 on both sides of the bearing beam 10 are balanced along the axis of the bearing beam 10, avoiding the formation of unilateral load. The top starting end of each rope 02 is assembled, and the assembly end is hoisted by a crane.

[0052] In the above method, the weight of the steel cage 01 borne by the guide wheel 31 and the auxiliary wheel is transmitted to the end of the load-bearing structure 20 through the setting of the pull plate 33; the symmetrical guidance of the auxiliary wheel 34 avoids uneven force on the guide structure 30 caused by unilateral load.

[0053] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A hoisting device for large-diameter pile foundation steel cages, characterized in that, include: The load-bearing beams must consist of at least two intersecting beams. The load-bearing structure, located at the connection position at the end of the load-bearing beam, has space for the rope to pass through; The guide structure, corresponding to the load-bearing structure, includes guide wheels positioned on the side facing the reinforcing cage; The load-bearing structure includes a limiting wheel and a stop wheel. The limiting wheel is rotatably connected to the load-bearing beam, and the distance between the stop wheel and the limiting wheel is adjustable. The rope passes through the gap between the stop wheel and the limit wheel and wraps around the guide wheel on the corresponding side; The rope is pulled by the gravity of the steel cage to wrap around and tighten towards the limiting wheel, and the stop wheel and the limiting wheel form a clamping and limiting effect on the rope.

2. The large-diameter pile foundation reinforcement cage hoisting device according to claim 1, characterized in that, The limiting wheels are arranged in a pair along the vertical direction, and the axis of the stop wheel is located between the two horizontal planes where the axis of the limiting wheels is located. The stop wheel moves toward the limit wheel to clamp the rope, and the rope bends and deforms into an S-shape, and is limited by friction with the groove structure of the stop wheel and the limit wheel.

3. The large-diameter pile foundation reinforcement cage hoisting device according to claim 1, characterized in that, The load-bearing structure includes a fixed seat and a movable seat. The fixed seat is fixedly connected to the end of the load-bearing beam. The limiting wheel is rotatably connected to the fixed seat. The stop wheel is fixedly connected to the movable seat. The distance between the movable seat and the fixed seat is adjustable.

4. The large-diameter pile foundation reinforcement cage hoisting device according to claim 3, characterized in that, The movable seat is a U-shaped structure with an opening on one side. The stop wheel is fixedly connected to the open end, and an adjusting component is provided at the closed end. The adjusting component is threadedly connected to the adjusting shaft at the closed end. A fixing plate is provided between the adjusting member and the closed end of the movable seat. A guide post is provided on the side of the fixing plate facing the movable seat. The guide post passes through the movable seat and is fixedly connected to the fixing seat. Rotate the adjusting member to move the movable seat between the fixed plate and the movable fixed seat along the axial direction of the guide post, thereby changing the distance between the stop wheel and the limit wheel.

5. The large-diameter pile foundation reinforcement cage hoisting device according to claim 1, characterized in that, The guide structure includes an adapter body, the inner cavity of which is shaped to the cross section of the supporting beam and is detachably fitted onto the supporting beam, and the guide wheel is rotatably connected to the adapter body.

6. The large-diameter pile foundation reinforcement cage hoisting device according to claim 5, characterized in that, The adapter body has several locking holes, through which fasteners pass and abut against and lock onto the outside of the load-bearing beam.

7. The large-diameter pile foundation reinforcement cage hoisting device according to claim 6, characterized in that, The adapter body is provided with a pull plate on the outside. The pull plate is arranged in the same direction as the bearing beam and has several adjustment holes along the length direction. Fasteners pass through the adjustment hole and the locking hole and lock them together. One end of the pull plate forms a clamping action with the end of the load-bearing structure based on the weight of the steel cage on the guide wheel.

8. The large-diameter pile foundation reinforcement cage hoisting device according to claim 5, characterized in that, The adapter body is equipped with auxiliary wheels, and the auxiliary wheels and the guide wheels are symmetrically distributed with respect to the load-bearing beam. The rope is wrapped around the outside of the auxiliary wheel, passes through the gap between the stop wheel and the limit wheel, and symmetrically wraps around the guide wheel.

9. A method for using a hoisting device for large-diameter pile foundation reinforcement cages, characterized in that, Includes the following steps: Adjust and fix the relative position of the guide structure and the load-bearing beam so that the spacing between the guide wheels matches the radial dimension of the steel cage; The rope passes through the gap between the stop wheel and the limit wheel and wraps around the guide wheel; Repeat the above steps until each rope is wrapped around the corresponding load-bearing structure and guide structure; The rope is pulled by the gravity of the steel cage to wrap around and tighten towards the limit wheel. The stop wheel and the limit wheel form a clamping and limiting effect on the rope. The top starting end of each rope is assembled, and the assembly end is hoisted using a crane.

10. The method of using the large-diameter pile foundation steel cage hoisting device according to claim 9, characterized in that, Includes the following steps: The relative position of the guide structure and the load-bearing beam is adjusted and fixed by a tie plate. One end of the tie plate forms a clamping action with the end of the load-bearing structure so that the spacing between the guide wheels matches the radial dimension of the steel cage. The rope is wrapped around the outside of the auxiliary wheel, passes through the gap between the stop wheel and the limit wheel, and is symmetrically wrapped around the guide wheel; Repeat the above steps until each rope is wrapped around the corresponding load-bearing structure and guide structure; Based on the gravity of the steel cage and the guiding effect of the auxiliary wheel and the guide wheel, the rope wraps around and is symmetrically tightened towards the side of the limiting wheel, and the stop wheel and the limiting wheel form a clamping and limiting effect on the rope. The top starting end of each rope is assembled, and the assembly end is hoisted using a crane.

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