A pile foundation reinforcement cage hoisting device

Abstract

This application relates to a reusable lifting device for pile foundation reinforcement cages, belonging to the technical field of engineering construction equipment. The device includes a lifting main body; the lifting main body includes an extension rod and a lifting section; one end of the extension rod is connected to the lifting section, and the other end is connected to a U-shaped connecting block; both ends of the connecting block are respectively provided with a sliding groove and a insertion hole; the sliding groove and the insertion hole are coaxially arranged; a fixing rod is slidably arranged in the sliding groove; a fixing unit is provided on the fixing rod; two through holes are opened on the fixing rod; steel ropes are threaded through the two through holes; a wire take-up and release unit is provided on the extension rod; one end of each of the two steel ropes is connected to the wire take-up and release unit, and the other end of each of the two steel ropes is fixedly connected to the end of the connecting block with the insertion hole, and the connection points of the two steel ropes and the connecting block are located on both sides of the locking hole; this application has the technical effects of convenient assembly and disassembly and improved lifting stability.

Description

Technical Field

[0001] This application relates to the technical field of engineering construction equipment, and in particular to a lifting device for reusable and detachable pile foundation steel cages. Background Technology

[0002] During the construction of the pile foundation reinforcement cage, lifting rods are needed to lift and position the reinforcement cage and control the pile top elevation.

[0003] Current construction methods mostly use short steel bars as disposable lifting bars, welding them to the main reinforcement of the steel cage. After concrete pouring, the lifting bars are directly embedded inside the pile and cannot be recovered, resulting in significant steel material waste and high construction costs. Some detachable lifting bar structures have also been developed, but existing detachable lifting bars generally suffer from insufficient locking reliability, leading to risks of slippage and loosening of the lifting points during steel cage hoisting. Disassembly of some structures requires manual insertion and removal of pins, making on-site operations cumbersome. Furthermore, they lack adaptation designs for lifting steel cages with transverse ribs, resulting in poor anti-slip capability during hoisting. Additionally, existing lifting bars are difficult to disassemble, making it difficult to quickly remove them before the concrete initially sets, and the reusability of the devices is poor, failing to adequately meet the safety, efficiency, and cost-effectiveness requirements of pile foundation construction sites.

[0004] Regarding the aforementioned technologies, the inventors believe that they suffer from drawbacks such as difficulty in disassembling the suspension rods and a high risk factor during disassembly. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a reusable lifting device for pile foundation reinforcement cages.

[0006] This application provides a reusable lifting device for pile foundation reinforcement cages, which adopts the following technical solution: A reusable lifting device for pile foundation reinforcement cages includes a lifting body; the lifting body includes an extension rod and a lifting section; one end of the extension rod is connected to the lifting section, and the other end is connected to a U-shaped connecting block; both ends of the connecting block are respectively provided with a sliding groove and a insertion hole; the sliding groove and the insertion hole are coaxially arranged; a fixing rod is slidably arranged in the sliding groove; a fixing unit is provided on the fixing rod; two through holes are provided on the fixing rod; steel ropes are threaded through the two through holes; a wire take-up and release unit is provided on the extension rod; one end of each of the two steel ropes is connected to the wire take-up and release unit, and the other end of each of the two steel ropes is fixedly connected to the end of the connecting block with the insertion hole, and the connection points of the two steel ropes and the connecting block are located on both sides of the locking hole.

[0007] By adopting the above technical solution, the extension rod and hoisting part of the main body of the lifting rod, together with the U-shaped connecting block, serve as the main load-bearing base. The sliding assembly of the fixing rod is achieved using coaxially arranged sliding grooves and insertion holes. Two steel ropes threaded on the fixing rod are connected at one end to the take-up and release unit, and the other end is symmetrically fixed to both sides of the insertion hole. Under the downward pressure of the fixing rod, they can wrap around the pre-welded hoisting steel bars in the steel cage. Combined with the fixing unit, the fixing rod is locked and positioned. Tightening the steel ropes by the take-up and release unit securely restrains the hoisting steel bars inside the connecting block. During hoisting operations, if the connecting... The block tends to slip along the axial direction of the hoisted reinforcing bar. The steel rope can increase the frictional resistance of the contact surface. The cross ribs of the hoisted reinforcing bar squeeze the steel rope, which can further increase the clamping force of the fixing rod on the hoisted reinforcing bar, effectively preventing slippage during hoisting and improving the safety and reliability of hoisting. The entire structure relies on the linkage of the steel rope, fixing rod and wire take-up and release unit to achieve locking. The hoisting bar device can be disassembled, recycled and reused without cutting or damage. The structure is simple and the on-site assembly operation is convenient. By pulling the steel rope, the fixing rod can also be automatically lifted upward and the hoisted reinforcing bar can be ejected, realizing the effect of automatically unlocking and welding the reinforcing bar.

[0008] Preferably, two receiving grooves communicating with the slide are respectively opened on the inner wall of the connecting block; the two steel ropes are located in the two receiving grooves respectively.

[0009] By adopting the above technical solution, a receiving groove communicating with the slide is opened on the inner wall of the connecting block, allowing the steel rope to be stored inside the receiving groove. This effectively prevents the steel rope from protruding and interfering with the assembly process of placing the hoisted reinforcing bars into the connecting block. At the same time, the receiving groove can provide protective restraint for the steel rope, preventing it from moving around, wearing, or being squeezed during hoisting and disassembly. This ensures the smoothness and accuracy of the steel rope's extension, winding, and unlocking actions, extends the service life of the steel rope, and ensures that the device can be stably and repeatedly disassembled and used.

[0010] Preferably, the insertion hole has an insertion space and a movable space; the insertion space is directly opposite the fixed rod; the movable space is used to accommodate two steel ropes.

[0011] By adopting the above technical solution, the insertion hole is divided into an insertion space directly facing the fixing rod and a movable space for accommodating the steel rope. This achieves a partitioned layout for the fixing rod insertion limit and the steel rope winding movement, effectively avoiding squeezing, interference, and jamming between the fixing rod and the steel rope during the insertion process, ensuring that the fixing rod can be accurately and smoothly inserted into place to complete the locking. At the same time, the movable space provides sufficient room for the steel rope's downward winding, tightening and fitting, and unlocking offset movements, enabling the steel rope to stably hold the hoisted steel bar and smoothly complete the subsequent release and unhooking actions.

[0012] Preferably, the fixing unit includes a fixing housing, a fixing block, and a spring; the fixing housing is disposed at the end of the fixing rod away from the connecting block; the fixing block is slidably disposed within the fixing housing; one end of the spring is connected to the fixing block, and the other end is connected to the fixing housing; a fixing groove is provided on the extension rod.

[0013] By adopting the above technical solution, the fixing block can slide within the fixed housing and use the spring to provide elastic driving force. It cooperates with the fixing groove on the extension rod, and after the fixing rod slides into place, the fixing block can be driven by the spring force to lock into the fixing groove, thereby achieving elastic mechanical locking of the fixing rod.

[0014] Preferably, the fixing unit further includes a slide rod; a sliding hole is provided on the fixing housing; the slide rod is slidably disposed in the sliding hole; one end of the slide rod is connected to the fixing block; and the spring is sleeved on the slide rod.

[0015] By adopting the above technical solution, by adding a sliding rod and a matching sliding hole, the spring is sleeved on the outside of the sliding rod. The sliding rod and the sliding hole cooperate with each other to guide and constrain the sliding movement of the spring and the fixed block, so as to avoid the lateral twisting and deflection of the spring and the jamming of the fixed block when the spring is working, and to ensure that the fixed block slides smoothly in the predetermined direction.

[0016] Preferably, the fixed housing has a first movable groove; the fixed block has a second movable groove; the two steel ropes pass through the first movable groove and the second movable groove respectively; a pushing unit is provided on the extension rod; the pushing unit is used to push the steel ropes away from the extension rod.

[0017] By adopting the above technical solution, the fixed housing has a first movable groove and the fixed block has a second movable groove for two steel ropes to pass through. The position change of the steel ropes can directly act on the fixed block. With the help of the pushing unit, the steel ropes are pushed away from the extension rod. The lateral force of the steel ropes can be used to apply a pushing force to the fixed block, thereby overcoming the spring force and realizing that the fixed block can automatically disengage from the fixed groove. There is no need to set up a separate drive component to directly operate the fixed block, which simplifies the overall mechanism structure.

[0018] Preferably, a sealing plate is slidably disposed on the fixed housing; the sealing plate is used to cover the first movable groove; the sealing plate has two openings; and two steel ropes pass through the two openings respectively.

[0019] By adopting the above technical solution, a sealing plate that can cover the first movable groove is slidably configured on the fixed shell, and the steel rope is installed by passing through the opening on the sealing plate. The sealing plate can block the first movable groove, effectively preventing concrete slurry and mud impurities from entering the interior of the fixed shell during the pouring process, and avoiding the situation where the fixing block and spring become stuck and fail due to mortar accumulation.

[0020] Preferably, the pushing unit includes a pushing base, a linear motor, and a pushing block; the pushing base is disposed on the extension rod; the linear motor is connected to the pushing base; the pushing block is connected to the power output end of the linear motor; the pushing block has two through holes; and two steel ropes pass through the two through holes respectively.

[0021] By adopting the above technical solution, the pushing unit uses a pushing base, a linear motor, and a pushing block with a through hole to cooperate. The pushing base provides a stable mounting base for the linear motor. The two steel ropes pass through the through hole of the pushing block to achieve positional constraint. The linear motor can drive the pushing block to move smoothly, thereby causing the two steel ropes to move laterally away from the extension rod in a synchronous manner. The through hole plays a guiding and limiting role for the steel ropes, ensuring that the steel ropes are subjected to uniform force and can stably output the action of pushing the steel ropes. There is no need for manual bending of the steel ropes, which reduces the difficulty of on-site operation and facilitates the rapid completion of the disassembly of the entire suspension rod device, thereby improving construction efficiency.

[0022] Preferably, the take-up and release unit includes a connecting seat, a take-up and release reel, and a motor; the connecting seat is disposed on the extension rod; the take-up and release reel is rotatably disposed on the connecting seat; one end of each of the two steel ropes is connected to the take-up and release reel and is wound around the take-up and release reel respectively; the motor is disposed on the connecting seat; the power output end of the motor is coaxially connected to the take-up and release reel.

[0023] By adopting the above technical solution, the two steel ropes are wound on the take-up and release reels respectively. The motor drives the take-up and release reels to rotate, which can simultaneously complete the winding and releasing of the two steel ropes. The tension of the steel ropes can be uniformly adjusted to ensure that the two steel ropes are subjected to equal force. This replaces the operation of manually pulling the steel ropes and reduces the intensity of on-site work.

[0024] Preferably, the hoisting part is provided with a plurality of hoisting holes along the length direction of the main body of the hoisting rod.

[0025] By adopting the above technical solution, the hoisting unit is equipped with multiple hoisting holes along the length of the main hoisting bar. The hoisting holes at different positions can be flexibly selected for hook attachment based on the weight of the rebar cage, the location of the hoisting points, and the on-site crane operating conditions. This facilitates adjustment of the rebar cage's hoisting posture, adapts to the leveling and hoisting needs of rebar cages of different specifications and sizes, and improves the stress state of the main hoisting bar and the rebar cage. Multiple hoisting holes allow for adjustable hoisting point positions, expanding the applicability of the device. Furthermore, some hoisting holes can serve as backup hoisting points, allowing switching to other hoisting holes to continue operation when a single hoisting hole shows wear and damage, thus enhancing the safety and service life of the device.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The main body of the lifting rod, including the extension rod and lifting section, works in conjunction with a U-shaped connecting block as the primary load-bearing structure. Sliding assembly of the fixing rod is achieved using coaxially arranged grooves and insertion holes. Two steel ropes threaded onto the fixing rod are connected at one end to the wire take-up unit and at the other end symmetrically fixed to both sides of the insertion hole. Under the downward pressure of the fixing rod, they can wrap around the pre-welded lifting reinforcement bars in the reinforcing cage. Combined with the fixing unit, the fixing rod is locked and positioned. Tightening the steel ropes using the wire take-up unit securely restrains the lifting reinforcement bars within the connecting block. During lifting operations, if the connecting block has any obstruction along the lifting rod... To prevent axial slippage of the reinforcing bars, the steel rope increases the frictional resistance of the contact surface. The transverse ribs of the lifting reinforcing bars compress the steel rope, further increasing the clamping force of the fixing rod on the lifting reinforcing bars. This effectively prevents slippage during the lifting process and improves the safety and reliability of the lifting. The entire structure relies on the linkage of the steel rope, fixing rod, and cable reel unit to achieve locking. The lifting bar device can be disassembled, recycled, and reused without cutting or damage. It has a simple structure and is convenient for on-site assembly and operation. By pulling the steel rope, the fixing rod can be automatically lifted upwards, and the lifting reinforcing bars can be ejected, achieving the effect of automatically unlocking and welding the reinforcing bars.

[0027] 2. The fixed housing has a first movable slot and the fixed block has a second movable slot for two steel ropes to pass through. The position change of the steel ropes can directly act on the fixed block. With the help of the pushing unit, the steel ropes are pushed away from the extension rod. The lateral force of the steel ropes can be used to apply a pushing force to the fixed block, thereby overcoming the spring force and realizing that the fixed block can automatically disengage from the fixed slot. There is no need to set up a separate drive component to directly operate the fixed block, simplifying the overall mechanism structure. Attached Figure Description

[0028] Figure 1 This is a structural diagram of a reusable lifting rod device for pile foundation reinforcement cages.

[0029] Figure 2 This is a schematic diagram of the fixed unit in the embodiment.

[0030] Figure 3 This is a schematic diagram of the structure of the receiving tank in the embodiment.

[0031] Figure 4 This is a structural diagram of the fixing unit and fixing rod before installation.

[0032] Figure 5 This is a structural diagram of the fixed unit and fixed rod after installation.

[0033] Figure 6 This is a structural diagram of the fixing unit and fixing rod during disassembly.

[0034] Figure 7 yes Figure 1 A magnified view of part A in the image.

[0035] Figure 8 yes Figure 1 A magnified view of part B in the image.

[0036] Explanation of reference numerals in the attached figures: 1. Main body of the lifting rod; 11. Extension rod; 111. Snap-fit ​​hole; 12. Lifting part; 2. Connecting block; 21. Insertion hole; 211. Insertion space; 212. Movement space; 22. Receiving groove; 3. Fixing rod; 4. Fixing unit; 41. Fixing shell; 411. First movable groove; 412. Sealing plate; 42. Fixing block; 421. Second movable groove; 43. Spring; 44. Sliding rod; 5. Steel rope; 6. Take-up and release unit; 61. Connecting seat; 62. Take-up and release reel; 63. Motor; 7. Pushing unit; 71. Pushing seat; 72. Linear motor; 73. Pushing block; 8. Lifting steel bar. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0038] This application discloses a reusable lifting device for pile foundation reinforcement cages. (Refer to...) Figure 1-6 The system includes a main body 1 for lifting bars; the main body 1 for lifting bars includes an extension rod 11 and a lifting section 12; the lifting section 12 has multiple lifting holes along the length of the main body 1 for lifting bars; the lifting rope of the crane is hooked onto the lifting holes through a hook; one end of the extension rod 11 is connected to the lifting section 12, and the other end is connected to a U-shaped connecting block 2; the opening of the connecting block 2 faces one side of the main body 1 for lifting bars; lifting steel bars 8 are pre-welded onto the steel cage, and the inner side of the connecting block 2 is used to accommodate the lifting steel bars 8; the two ends of the connecting block 2 are respectively provided with a sliding groove and a plug hole 21; the sliding groove and the plug hole 21 are coaxially arranged; a fixing rod 3 is slidably arranged in the sliding groove; a fixing unit 4 is provided on the fixing rod 3.

[0039] The fixed rod 3 has two through holes; steel ropes 5 are threaded through the two through holes; the extension rod 11 is equipped with a take-up and release unit 6; one end of each of the two steel ropes 5 is connected to the take-up and release unit 6, and the other end of each of the two steel ropes 5 is fixedly connected to one end of the connecting block 2 with the insertion hole 21, and the connection points of the two steel ropes 5 and the connecting block 2 are located on both sides of the snap-fit ​​hole 111.

[0040] When installing the main body 1 of the lifting rod, adjust the main body 1 so that the opening of the connecting block 2 is directly opposite the lifting steel bar 8; at this time, the fixing rod 3 is away from the snap-fit ​​hole 111; the two steel ropes 5 are in a loose state, and two receiving grooves 22 communicating with the sliding groove are respectively opened on the inner wall of the connecting block 2; the two steel ropes 5 are located in the two receiving grooves 22 and protrude from the receiving grooves 22; then move the connecting block 2 and place the lifting steel bar 8 into the connecting block 2; then adjust the position of the connecting block 2 so that the steel rope 5 is located between two adjacent transverse ribs of the lifting steel bar 8; then slide the fixing rod 3 towards the insertion hole 21. During this process, the end of the fixing rod 3... Two steel ropes 5 are pressed down, causing them to wrap around the hoisting reinforcing bar 8 respectively. The insertion hole 21 has an insertion space 211 and a movable space 212. The insertion space 211 is directly opposite the fixing rod 3. When the fixing rod 3 is inserted into the insertion space 211 of the insertion hole 21, the two steel ropes 5 are located in the movable space 212 respectively. The fixing unit 4 fixes the fixing rod 3 to the extension rod 11. Then, the take-up and release unit 6 is activated to pull the two steel ropes 5, tighten them, and wrap them tightly around the hoisting reinforcing bar 8. At this time, the fixing rod 3 is in close contact with the hoisting reinforcing bar 8, fixing the hoisting reinforcing bar 8 in the connecting block 2.

[0041] After the crane is started, the hoisting rope pulls the hoisting steel bar 8 and suspends the steel cage. When moving the suspended steel cage, if the connecting block 2 has a tendency to slide along the length of the hoisting steel bar 8, the steel rope 5 can increase the frictional resistance between the hoisting steel bar 8 and the inner wall of the connecting block 2. At the same time, the transverse ribs of the hoisting steel bar 8 will squeeze the steel rope 5, causing the steel rope 5 to pull the fixing rod 3, increasing the pressure between the fixing rod 3 and the hoisting steel bar 8.

[0042] Reference Figures 1 to 7The fixing unit 4 includes a fixing housing 41, a fixing block 42, a sliding rod 44, and a spring 43. The fixing housing 41 is located at the end of the fixing rod 3 away from the connecting block 2. A first movable groove 411 is provided on the fixing housing 41. A second movable groove 421 is provided on the fixing block 42. Two steel ropes 5 pass through the first movable groove 411 and the second movable groove 421 respectively. The fixing block 42 is slidably disposed inside the fixing housing 41. A sliding hole is provided on the fixing housing 41. The sliding rod 44 is slidably disposed inside the sliding hole. One end of the sliding rod 44 is connected to the fixing block 42. The spring 43 is sleeved on the sliding rod 44. One end of the spring 43 is connected to the fixing block 42, and the other end is connected to the fixing housing 41. A fixing groove is provided on the extension rod 11. A pushing unit 7 is provided on the extension rod 11. The pushing unit 7 is used to push the steel ropes 5 away from the extension rod 11.

[0043] When the fixing rod 3 is not inserted into the snap-fit ​​hole 111, the spring 43 presses the fixing block 42 against the extension rod 11; at this time, the two steel ropes 5 respectively abut against the side wall of the second movable groove 421 near the extension rod 11; when the fixing rod 3 is inserted into the snap-fit ​​hole 111, the fixing block 42 is aligned with the fixing groove, at this time the spring 43 pushes the fixing block 42 into the fixing groove; at this time, the two steel ropes 5 respectively abut against the side wall of the second movable groove 421 away from the extension rod 11.

[0044] After the concrete pouring is completed and before the concrete initially sets, the main body 1 of the lifting rod is removed. During removal, the drive unit 6 releases two steel ropes 5, leaving them loose. Then, the push unit 7 pushes the two steel ropes 5 away from the extension rod 11. The drive unit 6 then tightens the two steel ropes 5 again. Due to the outward shift of the two steel ropes 5 towards the extension rod 11, the two steel ropes 5 push the second movable groove 421 away from the side wall of the extension rod 11, and the housing spring 43... The elastic force pushes the fixing block 42 outward from the fixing groove; after the fixing block 42 is removed from the fixing groove, the two steel ropes 5, supported by the hoisting steel bar 8, squeeze the fixing rod 3 to disengage from the snap-fit ​​hole 111 until the fixing rod 3 is squeezed into the sliding groove. At this time, the hoisting steel bar 8 loses the limitation of the fixing rod 3. As the two steel ropes 5 move, the two steel ropes 5 push the hoisting steel bar 8 outward from the connecting block 2, so that the hoisting steel bar 8 is removed from the connecting block 2. Then the main body 1 of the hoisting bar is pulled away, and the removal of the main body 1 of the hoisting bar is completed.

[0045] To prevent external concrete from entering the second movable groove 421 from the first movable groove 411, a sealing plate 412 is slidably installed on the fixed housing 41; the sealing plate 412 is used to cover the first movable groove 411; the sealing plate 412 has two openings; two steel ropes 5 pass through the two openings respectively.

[0046] Reference Figures 4 to 5The pushing unit 7 includes a pushing seat 71, a linear motor 7263, and a pushing block 73. The pushing seat 71 is mounted on the extension rod 11. The linear motor 7263 is connected to the pushing seat 71. The pushing block 73 is connected to the power output end of the linear motor 7263. Two through holes are provided on the pushing block 73. Two steel ropes 5 pass through the two through holes respectively. The linear motor 7263 can push the pushing block 73 to move away from the extension rod 11, thereby causing the two steel ropes 5 to deflect outward from the extension rod 11 respectively.

[0047] Reference Figure 8 The take-up and unwind unit 6 includes a connecting seat 61, a take-up and unwind reel 62, and a motor 63. The connecting seat 61 is mounted on the extension rod 11. The take-up and unwind reel 62 is rotatably mounted on the connecting seat 61. One end of each of the two steel ropes 5 is connected to the take-up and unwind reel 62 and is wound around the reel 62. The motor 63 is mounted on the connecting seat 61. The power output end of the motor 63 is coaxially connected to the take-up and unwind reel 62. When the motor 63 rotates forward or reverse, it can drive the take-up and unwind reel 62 to rotate forward or reverse, thereby releasing or winding the two steel ropes 5. The motor 63 has a self-locking function, which can fix the take-up and unwind reel 62.

[0048] The working principle of the reusable lifting device for pile foundation steel cages in this application is as follows: The lifting steel bars 8 are pre-welded and fixed on the steel cage. Before the lifting operation, the opening of the U-shaped connecting block 2 of the lifting bar body 1 is aligned with the lifting steel bar 8. At this time, the fixing rod 3 is retracted and stored inside the slide groove, and the two steel ropes 5 are loose and stored in the receiving groove 22 of the connecting block 2. The lifting steel bar 8 is placed inside the connecting block 2, and the position is adjusted so that the two steel ropes 5 are placed between the two adjacent transverse ribs of the lifting steel bar 8. Then, the fixing rod 3 is slid towards the insertion hole 21. The ends of the fixing rod 3 press down on the two steel ropes 5, so that the steel ropes 5 wrap around the outside of the lifting steel bar 8, and the ends of the fixing rod 3 are inserted into the insertion space 211 of the insertion hole 21, thus achieving the initial limiting and fixing of the lifting steel bar 8.

[0049] After the fixing rod 3 is in place, the fixing unit 4 simultaneously completes self-locking: the fixing block 42 inside the fixing housing 41 is precisely aligned with the fixing groove on the extension rod 11, and the spring 43 pushes the fixing block 42 into the fixing groove through the slide rod 44, restricting the retraction displacement of the fixing rod 3. Then, the take-up and release unit 6 on the extension rod 11 is activated, and the take-up and release wheel 62 driven by the motor 63 winds up the steel rope 5, tightening the loose steel rope 5, so that the steel rope 5 is tightly wrapped around the surface of the hoisting steel bar 8, and at the same time, it causes the fixing rod 3 to be in close contact with the hoisting steel bar 8, and securely limiting the hoisting steel bar 8 inside the connecting block 2. The crane can lift the steel cage by attaching the lifting rope through the lifting hole of the lifting part 12. During the lifting process, if the connecting block 2 tends to slip along the length of the lifting steel bar 8, the taut steel rope 5 can effectively increase the frictional resistance between the lifting steel bar 8 and the inner wall of the connecting block 2. At the same time, the transverse ribs of the lifting steel bar 8 squeeze the steel rope 5, pulling the fixing rod 3 in the opposite direction to further press the lifting steel bar 8, which greatly improves the lifting stability and anti-slip performance. In addition, the sealing plate 412 slidably set on the fixed shell 41 can effectively block the first movable groove 411 to prevent concrete slurry from entering the interior of the mechanism and ensure the stability of the device operation.

[0050] Before the pile foundation concrete is poured and initially set, the lifting bar device can be disassembled and retrieved. During disassembly, first, drive the wire reel unit 6 to release the steel rope 5, restoring it to a loose state. Then, drive the push block 73 away from the extension rod 11 via the linear motor 7263 of the push unit 7, causing the two steel ropes 5 to shift outwards from the extension rod 11. Next, restart the wire reel unit 6 to tighten the steel rope 5. The shifted steel rope 5 presses against the fixing block 42 of the fixing unit 4, overcoming the spring force of the spring 43 and pushing the fixing block 42 out of the fixing groove of the extension rod 11. Continue winding the steel rope 5, using the suspended reinforcing bar 8 as support, to press against the fixing rod 3, causing the fixing rod 3 to retract from the insertion hole 21 into the sliding groove, completely releasing the restriction on the suspended reinforcing bar 8. Finally, as the steel rope 5 continues to wind up, gradually push the suspended reinforcing bar 8 outwards from inside the connecting block 2, completely separating the lifting bar body 1 from the reinforcing bar cage. The lifting bar device can then be completely extracted and retrieved, completing the disassembly operation.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reusable lifting device for pile foundation reinforcement cages, characterized in that: The system includes a main body (1) for the lifting rod; the main body (1) includes an extension rod (11) and a lifting part (12); one end of the extension rod (11) is connected to the lifting part (12), and the other end is connected to a U-shaped connecting block (2); the two ends of the connecting block (2) are respectively provided with a sliding groove and a plug hole (21); the sliding groove and the plug hole (21) are coaxially arranged; a fixing rod (3) is slidably arranged in the sliding groove; a fixing unit (4) is provided on the fixing rod (3); the... Two through holes are provided on the fixed rod (3); steel ropes (5) are inserted into the two through holes; a take-up and release unit (6) is provided on the extension rod (11); one end of each of the two steel ropes (5) is connected to the take-up and release unit (6), and the other end of each of the two steel ropes (5) is fixedly connected to the end of the connecting block (2) with the insertion hole (21), and the connection point between the two steel ropes (5) and the connecting block (2) is located on both sides of the snap-fit ​​hole (111).

2. The reusable lifting device for pile foundation reinforcement cages according to claim 1, characterized in that: The inner wall of the connecting block (2) has two receiving grooves (22) that communicate with the slide groove; the two steel ropes (5) are located in the two receiving grooves (22).

3. The reusable lifting device for pile foundation reinforcement cages according to claim 1, characterized in that: The insertion hole (21) has an insertion space (211) and a movable space (212); the insertion space (211) is directly opposite the fixed rod (3); the movable space (212) is used to accommodate the two steel ropes (5).

4. The reusable lifting bar device for pile foundation reinforcement cages according to claim 1, characterized in that: The fixing unit (4) includes a fixing housing (41), a fixing block (42), and a spring (43); the fixing housing (41) is located at one end of the fixing rod (3) away from the connecting block (2); the fixing block (42) is slidably disposed inside the fixing housing (41); one end of the spring (43) is connected to the fixing block (42), and the other end is connected to the fixing housing (41); a fixing groove is provided on the extension rod (11).

5. The reusable lifting device for pile foundation reinforcement cages according to claim 4, characterized in that: The fixing unit (4) also includes a slide rod (44); a sliding hole is provided on the fixing housing (41); the slide rod (44) is slidably disposed in the sliding hole; one end of the slide rod (44) is connected to the fixing block (42); and the spring (43) is sleeved on the slide rod (44).

6. The reusable lifting device for pile foundation reinforcement cages according to claim 4, characterized in that: The fixed housing (41) has a first movable groove (411); the fixed block (42) has a second movable groove (421); the two steel ropes (5) pass through the first movable groove (411) and the second movable groove (421) respectively; a pushing unit (7) is provided on the extension rod (11); the pushing unit (7) is used to push the steel ropes (5) away from the extension rod (11).

7. A reusable lifting bar device for pile foundation reinforcement cages according to claim 6, characterized in that: A sealing plate (412) is slidably disposed on the fixed housing (41); the sealing plate (412) is used to cover the first movable groove (411); the sealing plate (412) has two openings; and two steel ropes (5) pass through the two openings respectively.

8. A reusable lifting device for pile foundation reinforcement cages according to claim 6, characterized in that: The pushing unit (7) includes a pushing seat (71), a linear motor (72) (63) and a pushing block (73); the pushing seat (71) is mounted on the extension rod (11); the linear motor (72) (63) is connected to the pushing seat (71); the pushing block (73) is connected to the power output end of the linear motor (72) (63); the pushing block (73) has two through holes; and two steel ropes (5) pass through the two through holes respectively.

9. A reusable lifting device for pile foundation reinforcement cages according to claim 1, characterized in that: The take-up and release unit (6) includes a connecting seat (61), a take-up and release reel (62), and a motor (63); the connecting seat (61) is mounted on the extension rod (11); the take-up and release reel (62) is rotatably mounted on the connecting seat (61); one end of each of the two steel ropes (5) is connected to the take-up and release reel (62) and is wound around the take-up and release reel (62); the motor (63) is mounted on the connecting seat (61); the power output end of the motor (63) is coaxially connected to the take-up and release reel (62).

10. A reusable lifting device for pile foundation reinforcement cages according to claim 1, characterized in that: The hoisting part (12) has multiple hoisting holes along the length of the main body (1) of the hoisting rod.

Images