Specialized lifting device and loading and unloading process for hoisting large pipe pile pipe joint

Abstract

The present application relates to the technical field of pipe pile pipe joint hoisting, and discloses a special lifting appliance for large pipe pile pipe joint hoisting and a loading and unloading process, the special lifting appliance for large pipe pile pipe joint hoisting comprises a main lifting arm, a lifting lug, a counterweight and a buffer pad, is combined into a C-shaped lifting arm, realizes transfer hoisting through the mode of laterally sleeving into the pipe pile, the lifting lug is fixedly installed at the top of the main lifting arm, the counterweight is installed at the upper end and the bottom end of the main lifting arm, and the corresponding weight of the pipe pile sleeved on the upper end and the bottom end of the main lifting arm is matched, the buffer pad is fixedly installed at the top of one end of the main lifting arm away from the counterweight, and the high friction coefficient of the buffer pad prevents the pipe pile from slipping during hoisting; the support component corresponding to the size of the pipe pile is matched and ejected at the sleeving connection area of the main lifting arm and the pipe pile, the two sides of the inner wall of the pipe pile are supported and fixed, the posture of the pipe pile is automatically corrected, the axis of the pipe pile is always kept vertical during hoisting, and the lifting appliance is prevented from being unbalanced due to eccentricity.

Description

Technical Field

[0001] This invention relates to the field of pipe pile and pipe section hoisting technology, and more specifically, to special hoisting tools and loading / unloading processes for hoisting large pipe pile and pipe sections. Background Technology

[0002] Large-diameter pipe pile sections are large hollow precast components used in pile foundation engineering. They are usually made of concrete or steel and have the characteristics of high strength and long service life. They are widely used in the engineering field. Large-diameter pipe pile sections are usually hollow concrete or steel structures, and a single section can weigh hundreds of tons. The pipe section is hollow and thin-walled. Direct hoisting is prone to deformation or cracking due to uneven stress. It is usually necessary to use a C-type crane boom special lifting tool to distribute stress and assist in hoisting and transportation.

[0003] In existing technologies, C-type booms are typically attached to a gantry hook at one end and inserted into the pipe pile at the other end. The pipe pile is lifted by friction or internal bracing. If lateral wind loads are encountered during the lifting process, or if there is a slight tilt when the lifting equipment is moved, the open end of the C-type frame cannot provide a closed constraint. The pipe pile is prone to lateral swinging along the opening direction. If the swing amplitude exceeds the anti-detachment limit of the lifting device, it may cause the pipe pile to collide with the frame or even slip off the opening, affecting the safety of the overall lifting process. Summary of the Invention

[0004] This invention provides a special lifting tool and loading / unloading process for hoisting large pipe pile sections, solving the technical problem in related technologies where the pipe pile is subject to slight tilting when encountering lateral wind loads or movement of lifting equipment during hoisting, and the open end of the C-shaped frame cannot provide closed constraint, causing the pipe pile to easily swing laterally along the opening direction.

[0005] This invention provides a special lifting tool for hoisting large pipe pile sections, comprising:

[0006] The main boom, lifting lugs, counterweights, and buffer pads are combined to form a C-shaped boom, which is used to transfer and lift the pipe piles by laterally inserting them into the piles.

[0007] The lifting lug is fixedly installed on the top of the main boom. The counterweight is installed on the upper end of the main boom and matches the weight of the pipe pile fitted on the bottom end. The buffer pad is fixedly installed on the top of the end of the main boom away from the counterweight. The high friction coefficient of the buffer pad prevents slippage during the lifting of the pipe pile.

[0008] It also includes expansion support mechanisms and adaptation adjustment mechanisms to distribute the concentrated stress during the pipe pile hoisting process into uniform loads, ensuring that the overall stress on the pipe pile is balanced.

[0009] As a further optimization of the present invention, the expansion support mechanism includes a dual-axis motor. A cavity is provided in the lower middle part of the main boom. The outer wall of the dual-axis motor is fixedly installed on the inner wall of the cavity. Hollow sleeves are fixedly connected to both sides of the inner wall of the cavity. Rotary shafts are fixedly connected to the upper and lower drive ends of the dual-axis motor. The two rotating shafts are respectively rotatably connected to the inside of the hollow sleeves on both sides.

[0010] As a further optimization of the present invention, the ends of the rotating shafts on both sides away from the dual-axis motor are fixedly connected to connecting parts, the inner walls of the hollow sleeves on both sides are slidably connected to convex parts, and the outer walls of the rotating shafts on both sides are fitted with connecting springs. One end of the connecting spring is fixedly connected to the hollow sleeve, and the other end of the connecting spring is fixedly connected to the convex part.

[0011] As a further optimization of the present invention, arc-shaped winglets are fixedly connected to both sides of the outer wall of the connecting member on both sides, and the arc surfaces of the arc-shaped winglets on both sides are arranged symmetrically in opposite directions. Guide blocks are fixedly connected to both sides of the inner wall of the convex member on both sides. The arc-shaped winglets on both sides are slidably connected to the guide blocks on both sides respectively. Support members are fixedly connected to the ends of the convex members on both sides. Several rubber strips are evenly fixedly connected to the outer wall of the support members on both sides.

[0012] As a further optimization of the present invention, the adapter adjustment mechanism includes a dual-axis track and a hollow frame plate. The dual-axis track is fixedly installed on the lower end of the main boom, and the hollow frame plate is slidably connected to the outer wall of the dual-axis track.

[0013] As a further optimization of the present invention, a T-shaped plate is fixedly connected to the middle of the outer wall of the hollow frame plate, and a sleeve frame is fixedly connected to the middle of the end of the dual-axis track away from the main boom, and the T-shaped plate is slidably connected to the inner wall of the sleeve frame.

[0014] As a further optimization of the present invention, protrusions are fixedly connected to the middle of the upper and lower sides of the T-shaped plate, and the outer walls of the protrusions on both sides are slidably connected to the middle of the sleeve frame. Telescopic rods are hinged to both sides of the outer wall of the hollow frame plate.

[0015] As a further optimization of the present invention, the ends of the telescopic rods on both sides away from the hollow frame plate are respectively hinged to the middle of the protrusions on both sides, and the inner walls of the sleeve frame are fixedly connected to the compensating springs on both sides, and the other ends of the compensating springs on both sides are fixedly connected to the T-shaped plate.

[0016] As a further optimization of the present invention, a dual-axis electric push rod is fixedly installed on the inner wall of the hollow frame plate, and a cover is fixedly installed on both sides of the driving end of the dual-axis electric push rod, with the outer walls of the cover on both sides respectively abutting against the outer wall of the pipe pile.

[0017] As a further optimization of the present invention, the loading and unloading process for hoisting large pipe pile sections, applied to a special lifting device for hoisting large pipe pile sections, includes the following steps:

[0018] Step 1: Before hoisting the pipe pile, the two rotating shafts on both sides are driven to rotate in the forward direction by the dual-axis motor. The connecting parts on both sides rotate synchronously with the rotating shafts and drive the arc-shaped winglets on both sides to slide along the outer wall of the guide blocks on both sides. This further drives the convex parts on both sides to slide towards the inner wall of the hollow sleeves on both sides, and generates compression deformation on the connecting springs on both sides, and accumulates a certain elastic potential energy, so that the convex parts on both sides are housed in the inner wall of the hollow sleeves on both sides.

[0019] The two side covers are moved to the inner walls of the dual-axis electric push rod by driving the dual-axis electric push rod to adjust and adapt to the size of the pipe pile.

[0020] Step 2: When transferring and hoisting the pipe pile, the pipe pile is installed on the lower outer wall of the main boom. The dual-axis motor drives the rotating shafts on both sides to rotate in the opposite direction. The arc surfaces of the two arc-shaped winglets slide in the opposite direction along the outer walls of the two guide blocks, causing the two convex parts to move outward along the inner walls of the two hollow sleeves. Under the release of the elastic potential energy accumulated by the connecting springs on both sides, the two convex parts are popped out along the inner walls of the hollow sleeves. Corresponding to the inner wall of the pipe pile, the support is popped out to face the inner wall of the pipe pile through the convex parts. The rubber strip makes the contact process with the pipe pile more stable.

[0021] Step 3: Based on the diameter and length of the pipe pile, the two side covers are first moved outward by the dual-axis electric push rod to match and attach to the outer wall of the pipe pile. The outer wall of the pipe pile of the corresponding length exerts a compressive force on the hollow frame plate, causing the hollow frame plate to slide along the outer wall of the dual-axis track. The T-shaped plate slides along the inner wall of the frame through the telescopic rods and protrusions on both sides. The T-shaped plate exerts a compressive force on the two sets of compensating springs inside the frame, causing deformation. This makes the outer wall of the hollow frame plate tightly attached to the outer end of the pipe pile, ensuring the tightness and stability of the pipe pile end. After the installation is completed, the hoisting equipment is connected to the hook and the lug to hoist the pipe pile to the designated position.

[0022] Step 4: Finally, when the pipe pile is removed, the dual-axis electric push rod drives the two side covers to move up and down to the sides, and pushes the hollow frame plate outward to release the lock on the end of the pipe pile;

[0023] Then, by driving the two rotating shafts in the forward direction with a dual-axis motor, the above initial steps are repeated, so that the two convex parts are housed in the inner wall of the two hollow sleeves, which drives the two supporting parts away from the inner wall of the pipe pile, releasing the support of the pipe pile, and finally removing the pipe pile from the main boom to complete the loading and unloading.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The special lifting device for hoisting large pipe pile sections described in this invention features a pop-out support component that matches the pipe pile diameter, installed in the connection area between the main boom and the pipe pile. This component supports and fixes both sides of the inner wall of the pipe pile. The pop-out support component can adapt to different diameters and is compatible with multiple specifications of pipe piles in the same project. Traditional C-type booms often fix the pipe pile by clamping it to the outer wall, which can easily damage the outer anti-corrosion layer, concrete protective layer, or thin-walled pipe pile structure. However, the double-sided inner wall support transfers the stress point to the inside of the pipe pile, avoiding damage to the outer surface from the source. The inner wall support pushes outward from the inside, and the direction of the force is consistent with the radial direction of the pipe pile, preventing external wall compression deformation. Furthermore, after the boom is inserted into the pipe pile, it can automatically correct the pipe pile posture, ensuring that the pipe pile axis remains vertical during hoisting and avoiding imbalance of the lifting device due to eccentricity.

[0026] 2. The special lifting tool for lifting large pipe pile sections described in this invention allows the convex part in the support component to adapt to the inner wall size of the pipe pile during the ejection process after the pipe pile is assembled, ensuring stable support for the pipe pile during lifting. It can automatically fill the gap in real time according to the actual size of the inner wall, achieving zero-gap contact between the flexible support component and the pipe wall. The convex part forms a bidirectional top constraint through double-sided symmetrical ejection contact, limiting the radial displacement of the pipe pile. In case of slight swing of the boom during lifting, the pipe pile will not shift synchronously with the swing, ensuring that the axis of the pipe pile is always consistent with the lifting direction.

[0027] 3. The special lifting device for hoisting large pipe pile sections described in this invention has a locking mechanism at the suspension end of the main boom that can adapt to and lock the end of the pipe pile, and provides buffer protection for the end of the pipe pile. This ensures that both ends of the pipe wall are in a balanced support state, the middle of the main boom supports the waist of the pipe pile, and the suspension end locks both ends of the pipe pile, forming stable multi-point support at both ends and the middle. This transforms the cantilever force of the long pipe pile into a uniformly distributed force, adapts to the pipe pile end size and is compatible with multiple specifications of pipe piles, and buffers and protects the end to avoid damage to the pipe pile. This, in turn, limits the axial movement and radial sway of the pipe pile, and improves the stability of the hoisting. Attached Figure Description

[0028] Figure 1 Here is a three-dimensional schematic diagram of the overall structure proposed in this invention:

[0029] Figure 2 Here is a bottom view of the overall structure proposed in this invention:

[0030] Figure 3 This is a schematic diagram of the overall support state proposed in this invention:

[0031] Figure 4 This is a schematic vertical cross-sectional view of the main boom proposed in this invention:

[0032] Figure 5 for Figure 4 Enlarged view of point A in the middle:

[0033] Figure 6 Here is a schematic diagram of the internal structure of the hollow sleeve proposed in this invention:

[0034] Figure 7 This is a schematic diagram of the vertical cross-section of the hollow sleeve and the convex part proposed in this invention:

[0035] Figure 8 This is a schematic diagram showing a partial structural disassembly of the expansion support mechanism proposed in this invention:

[0036] Figure 9 Here is a schematic diagram of the internal structure of the frame proposed in this invention:

[0037] Figure 10 for Figure 9 Enlarged view of point B:

[0038] Figure 11 This is a schematic horizontal cross-sectional view of the frame proposed in this invention.

[0039] In the picture:

[0040] 1. Main boom; 2. Lifting lug; 3. Counterweight; 4. Buffer pad; 5. Expansion support mechanism; 501. Dual-axis motor; 502. Cavity; 503. Hollow sleeve; 504. Connecting spring; 505. Convex part; 506. Rotating shaft; 507. Connecting part; 508. Arc-shaped wing; 509. Guide block; 510. Support part; 511. Rubber strip; 6. Adaptive adjustment mechanism; 601. Dual-axis track; 602. Hollow frame plate; 603. T-shaped plate; 604. Sleeve frame; 605. Protrusion; 606. Telescopic rod; 607. Compensating spring; 608. Dual-axis electric push rod; 609. Cover part. Detailed Implementation

[0041] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0042] like Figures 1 to 11 As shown in the embodiment of the present invention, the special lifting tool for hoisting large pipe pile sections includes:

[0043] The main boom 1, lifting lug 2, counterweight 3, and buffer pad 4 are combined to form a C-shaped boom, which is used to transfer and lift the pipe pile by laterally inserting it into the pile.

[0044] The lifting lug 2 is fixedly installed on the top of the main boom 1. The counterweight 3 is installed on the upper end of the main boom 1 and matches the weight of the pipe pile fitted on the bottom end. The buffer pad 4 is fixedly installed on the top of the end of the main boom 1 away from the counterweight 3. The high friction coefficient of the buffer pad 4 prevents the pipe pile from slipping during the lifting process.

[0045] It also includes an expansion support mechanism 5 and an adaptation adjustment mechanism 6, which disperse the concentrated stress during the pipe pile hoisting process into a uniform load, ensuring that the overall stress of the pipe pile is balanced.

[0046] It should be noted that the pipe pile is sleeved on the lower end of the main boom 1 and avoids slippage and falling off through frictional contact with the buffer pad 4. The hoisting equipment completes the transfer and hoisting of the pipe pile on the main boom 1 by connecting with the lifting lug 2.

[0047] like Figure 2 - Figure 4 and Figure 7 - Figure 8 As shown, the expansion support mechanism 5 includes a dual-axis motor 501. A cavity 502 is provided in the lower center of the main boom 1. The outer wall of the dual-axis motor 501 is fixedly installed on the inner wall of the cavity 502. Hollow sleeves 503 are fixedly connected to both sides of the inner wall of the cavity 502. Rotary shafts 506 are fixedly connected to the upper and lower drive ends of the dual-axis motor 501. The two rotating shafts 506 are rotatably connected to the inside of the two hollow sleeves 503 respectively. A connecting piece 507 is fixedly connected to the end of the two rotating shafts 506 away from the dual-axis motor 501. A convex piece 505 is slidably connected to the inner wall of the two hollow sleeves 503. The outer wall of the two rotating shafts 506... Each component is fitted with a connecting spring 504. One end of the connecting spring 504 is fixedly connected to the hollow sleeve 503, and the other end of the connecting spring 504 is fixedly connected to the convex component 505. Arc-shaped winglets 508 are fixedly connected to both sides of the outer wall of the connecting components 507 on both sides. The arc surfaces of the arc-shaped winglets 508 on both sides are arranged symmetrically in opposite directions. Guide blocks 509 are fixedly connected to both sides of the inner wall of the convex component 505 on both sides. The arc-shaped winglets 508 on both sides are slidably connected to the guide blocks 509 on both sides respectively. Support components 510 are fixedly connected to the ends of the convex components 505 on both sides. Several rubber strips 511 are evenly fixedly connected to the outer wall of the support components 510 on both sides.

[0048] It should be noted that before the pipe pile is hoisted, the dual-axis motor 501 drives the two rotating shafts 506 to rotate in the forward direction. The two connecting parts 507 rotate synchronously with the rotating shafts 506 and drive the arc-shaped winglets 508 on both sides to slide along the outer wall of the guide blocks 509 on both sides. This further drives the two convex parts 505 on both sides to slide towards the inner wall of the hollow sleeves 503 on both sides, and generates compression deformation on the connecting springs 504 on both sides, and accumulates a certain elastic potential energy, so that the two convex parts 505 on both sides are housed in the inner wall of the hollow sleeves 503 on both sides.

[0049] Correspondingly, when transferring and hoisting the pipe pile, the pipe pile is sleeved and installed on the lower outer wall of the main boom 1. The dual-axis motor 501 drives the rotating shafts 506 on both sides to rotate in the opposite direction. The arc surfaces of the arc-shaped winglets 508 on both sides slide in the opposite direction along the outer walls of the guide blocks 509 on both sides, causing the convex parts 505 on both sides to move outward along the inner walls of the hollow sleeves 503 on both sides. Under the release of the elastic potential energy accumulated by the connecting springs 504 on both sides, the convex parts 505 on both sides are popped out along the inner walls of the hollow sleeves 503. Corresponding to the inner wall of the pipe pile, the support 510 is popped out to face the inner wall of the pipe pile through the convex parts 505. The rubber strip 511 makes the contact process with the pipe pile more stable.

[0050] like Figure 1 - Figure 5 and Figure 9 - Figure 11 As shown, the adapter adjustment mechanism 6 includes a dual-axis track 601 and a hollow frame plate 602. The dual-axis track 601 is fixedly installed on the lower end of the main boom 1. The hollow frame plate 602 is slidably connected to the outer wall of the dual-axis track 601. A T-shaped plate 603 is fixedly connected to the middle of the outer wall of the hollow frame plate 602. A sleeve frame 604 is fixedly connected to the middle of the end of the dual-axis track 601 away from the main boom 1. The T-shaped plate 603 is slidably connected to the inner wall of the sleeve frame 604. Protrusions 605 are fixedly connected to the middle of the upper and lower sides of the T-shaped plate 603. The outer walls of the two protrusions 605 are slidably connected to the sleeve frame 604. In the middle, telescopic rods 606 are hinged to both sides of the outer wall of the hollow frame plate 602. The ends of the telescopic rods 606 away from the hollow frame plate 602 are respectively hinged to the middle of the two protrusions 605. Compensating springs 607 are fixedly connected to both sides of the inner wall of the sleeve 604. The other ends of the two compensating springs 607 are fixedly connected to the T-shaped plate 603. A dual-axis electric push rod 608 is fixedly installed on the inner wall of the hollow frame plate 602. Covers 609 are fixedly installed on both sides of the driving end of the dual-axis electric push rod 608. The outer walls of the two covers 609 abut against the outer wall of the pipe pile.

[0051] It should be noted that, corresponding to the diameter and length of the pipe pile, the two side coverings 609 are first moved outward by the dual-axis electric push rod 608 to match and attach to the outer wall of the pipe pile. The outer wall of the pipe pile of the corresponding length exerts a compressive force on the hollow frame plate 602, causing the hollow frame plate 602 to slide along the outer wall of the dual-axis track 601. The T-shaped plate 603 slides along the inner wall of the sleeve frame 604 through the telescopic rods 606 and the protrusions 605 on both sides. The T-shaped plate 603 exerts a compressive force on the two sets of compensating springs 607 inside the sleeve frame 604, causing deformation. This makes the outer wall of the hollow frame plate 602 tightly attached to the outer end of the pipe pile, ensuring the tightness and stability of the pipe pile end. After the installation is completed, the hoisting equipment is connected to the hoisting lug 2 through the hook to hoist the pipe pile to the designated position.

[0052] Finally, when the pipe pile is removed, the dual-axis electric push rod 608 drives the two side covers 609 to move up and down to the sides, and pushes the hollow frame plate 602 outward to release the lock on the end of the pipe pile.

[0053] The dual-axis motor 501 drives the rotating shafts 506 on both sides to rotate in the forward direction, repeating the initial steps above. This causes the convex parts 505 on both sides to be housed in the inner wall of the hollow sleeves 503 on both sides, driving the support parts 510 on both sides away from the inner wall of the pipe pile, releasing the support for the pipe pile, and finally removing the pipe pile from the main boom 1 to complete the loading and unloading.

[0054] The loading and unloading process for hoisting large pipe pile sections, and the application of specialized lifting equipment for hoisting large pipe pile sections.

[0055] Includes the following steps:

[0056] Step 1: Before hoisting the pipe pile, the dual-axis motor 501 drives the two rotating shafts 506 to rotate in the forward direction. The connecting parts 507 on both sides rotate synchronously with the rotating shafts 506 and drive the arc-shaped winglets 508 on both sides to slide along the outer wall of the guide blocks 509 on both sides. This further drives the convex parts 505 on both sides to slide towards the inner wall of the hollow sleeves 503 on both sides, and generates compression deformation on the connecting springs 504 on both sides, and accumulates a certain elastic potential energy, so that the convex parts 505 on both sides are housed in the inner wall of the hollow sleeves 503 on both sides.

[0057] The two side covers 609 are moved on both sides of the inner wall of the dual-axis electric push rod 608 to adjust and adapt to the size of the pipe pile.

[0058] Step 2: When transferring and hoisting the pipe pile, the pipe pile is installed on the lower outer wall of the main boom 1, and the dual-shaft motor 501 drives the rotating shafts 506 on both sides to rotate in the opposite direction. The arc surfaces of the arc-shaped winglets 508 on both sides slide in the opposite direction along the outer walls of the guide blocks 509 on both sides, so that the convex parts 505 on both sides move outward along the inner walls of the hollow sleeves 503 on both sides. Under the release of the elastic potential energy accumulated by the connecting springs 504 on both sides, the convex parts 505 on both sides pop out along the inner walls of the hollow sleeves 503. Corresponding to the inner wall of the pipe pile, the support 510 is popped out to face the inner wall of the pipe pile through the convex parts 505. The rubber strip 511 makes the contact process with the pipe pile more stable.

[0059] Step 3: Based on the diameter and length of the pipe pile, the dual-axis electric push rod 608 drives the two side coverings 609 to move outward and match and attach to the outer wall of the pipe pile. The outer wall of the pipe pile of the corresponding length exerts a compressive force on the hollow frame plate 602, causing the hollow frame plate 602 to slide along the outer wall of the dual-axis track 601. The T-shaped plate 603 slides along the inner wall of the sleeve frame 604 through the telescopic rods 606 and the protrusions 605 on both sides. The T-shaped plate 603 exerts a compressive force on the two sets of compensating springs 607 inside the sleeve frame 604, causing deformation. This makes the outer wall of the hollow frame plate 602 tightly attached to the outer end of the pipe pile, ensuring the tightness and stability of the pipe pile end. After the installation is completed, the hoisting equipment is connected to the hoisting lug 2 through the hook to hoist the pipe pile to the designated position.

[0060] Step 4: Finally, when the pipe pile is removed, the dual-axis electric push rod 608 drives the two side covers 609 to move up and down to the sides, and pushes the hollow frame plate 602 outward to release the lock on the end of the pipe pile.

[0061] During this process, the dual-axis motor 501 drives the rotating shafts 506 on both sides to rotate in the forward direction, repeating the above initial steps, so that the convex parts 505 on both sides are housed in the inner wall of the hollow sleeves 503 on both sides, driving the support parts 510 on both sides away from the inner wall of the pipe pile, releasing the support of the pipe pile, and finally removing the pipe pile from the main boom 1 to complete the loading and unloading.

[0062] Working principle:

[0063] First, before the pipe pile is hoisted, the dual-axis motor 501 drives the two rotating shafts 506 to rotate in the forward direction. The two connecting parts 507 rotate synchronously with the rotating shafts 506 and drive the arc-shaped winglets 508 on both sides to slide along the outer wall of the guide blocks 509 on both sides. This further drives the two convex parts 505 on both sides to slide towards the inner wall of the hollow sleeves 503 on both sides, and generates compression deformation on the connecting springs 504 on both sides, and accumulates a certain elastic potential energy, so that the two convex parts 505 on both sides are housed in the inner wall of the hollow sleeves 503 on both sides.

[0064] The two side covers 609 are moved on both sides of the inner wall of the dual-axis electric push rod 608 to adjust and adapt to the size of the pipe pile.

[0065] When transferring and hoisting the pipe pile, the pipe pile is sleeved and installed on the lower outer wall of the main boom 1. The dual-axis motor 501 drives the rotating shafts 506 on both sides to rotate in the opposite direction. The arc surfaces of the arc-shaped winglets 508 on both sides slide in the opposite direction along the outer walls of the guide blocks 509 on both sides, causing the convex parts 505 on both sides to move outward along the inner walls of the hollow sleeves 503 on both sides. Under the release of the elastic potential energy accumulated by the connecting springs 504 on both sides, the convex parts 505 on both sides are popped out along the inner walls of the hollow sleeves 503. Corresponding to the inner wall of the pipe pile, the support 510 is popped out to face the inner wall of the pipe pile through the convex parts 505. The rubber strip 511 makes the contact process with the pipe pile more stable.

[0066] Corresponding to the diameter and length of the pipe pile, the two side coverings 609 are first moved outward by the dual-axis electric push rod 608 to match and attach to the outer wall of the pipe pile. The outer wall of the pipe pile of the corresponding length exerts a compressive force on the hollow frame plate 602, causing the hollow frame plate 602 to slide along the outer wall of the dual-axis track 601. The T-shaped plate 603 slides along the inner wall of the sleeve frame 604 through the telescopic rods 606 and the protrusions 605 on both sides. The T-shaped plate 603 exerts a compressive force on the two sets of compensating springs 607 inside the sleeve frame 604, causing deformation. This makes the outer wall of the hollow frame plate 602 tightly attached to the outer end of the pipe pile, ensuring the tightness and stability of the pipe pile end. After the installation is completed, the hoisting equipment is connected to the hoisting lug 2 through the hook to hoist the pipe pile to the designated position.

[0067] Finally, when the pipe pile is unloaded, the dual-axis electric push rod 608 drives the two side coverings 609 to move up and down to the sides, and pushes the hollow frame plate 602 outward to release the lock on the end of the pipe pile. During this process, the dual-axis motor 501 drives the two side rotating shafts 506 to rotate in the forward direction. The above initial steps are repeated, so that the two side convex parts 505 are housed in the inner wall of the two side hollow sleeves 503, which drives the two side support parts 510 away from the inner wall of the pipe pile, releasing the support on the pipe pile. Finally, the pipe pile is removed from the main boom 1 to complete the loading and unloading.

[0068] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A special lifting tool for hoisting large pipe pile sections, characterized in that, include: The main boom (1), lifting lug (2), counterweight (3) and buffer pad (4) are combined into a C-shaped boom, which is transferred and lifted by laterally inserting the pipe pile; The lifting lug (2) is fixedly installed on the top of the main boom (1). The counterweight (3) is installed on the upper end of the main boom (1) and matches the weight of the pipe pile fitted on the bottom end. The buffer pad (4) is fixedly installed on the top of the end of the main boom (1) away from the counterweight (3). The high friction coefficient of the buffer pad (4) prevents slippage during the pipe pile lifting process. It also includes an expansion support mechanism (5) and an adaptation adjustment mechanism (6) to disperse the concentrated stress during the pipe pile hoisting process into a uniform load, ensuring that the overall stress of the pipe pile is balanced; The expansion support mechanism (5) includes a dual-axis motor (501). A cavity (502) is provided in the lower middle part of the main boom (1). The outer wall of the dual-axis motor (501) is fixedly installed on the inner wall of the cavity (502). Hollow sleeves (503) are fixedly connected to both sides of the inner wall of the cavity (502). Rotary shafts (506) are fixedly connected to the upper and lower drive ends of the dual-axis motor (501). The two rotating shafts (506) are rotatably connected to the inside of the two hollow sleeves (503) respectively. Both ends of the rotating shafts (506) on both sides away from the dual-axis motor (501) are fixedly connected to a connecting piece (507). The inner walls of the hollow sleeves (503) on both sides are slidably connected to a convex piece (505). The outer walls of the rotating shafts (506) on both sides are fitted with a connecting spring (504). One end of the connecting spring (504) is fixedly connected to the hollow sleeve (503), and the other end of the connecting spring (504) is fixedly connected to the convex piece (505). Both sides of the outer wall of the connecting member (507) are fixedly connected with arc-shaped wing pieces (508). The arc surfaces of the arc-shaped wing pieces (508) are arranged symmetrically in opposite directions. Both sides of the inner wall of the convex member (505) are fixedly connected with guide blocks (509). The arc-shaped wing pieces (508) on both sides are slidably connected to the guide blocks (509) on both sides respectively. Both sides of the convex member (505) are fixedly connected with support members (510). Several rubber strips (511) are evenly fixedly connected around the outer wall of the support members (510) on both sides. The adapter adjustment mechanism (6) includes a dual-axis track (601) and a hollow frame plate (602). The dual-axis track (601) is fixedly installed on the lower end of the main boom (1), and the hollow frame plate (602) is slidably connected to the outer wall of the dual-axis track (601). A T-shaped plate (603) is fixedly connected to the middle of the outer wall of the hollow frame plate (602), and a sleeve frame (604) is fixedly connected to the middle of the end of the dual-axis track (601) away from the main boom (1). The T-shaped plate (603) is slidably connected to the inner wall of the sleeve frame (604). The upper and lower sides of the T-shaped plate (603) are fixedly connected with protrusions (605), and the outer walls of the protrusions (605) on both sides are slidably connected to the middle of the sleeve frame (604). The outer walls of the hollow frame plate (602) are hinged with telescopic rods (606). The ends of the telescopic rods (606) on both sides away from the hollow frame plate (602) are respectively hinged to the middle of the two side protrusions (605). Compensating springs (607) are fixedly connected to both sides of the inner wall of the sleeve frame (604), and the other ends of the compensating springs (607) on both sides are fixedly connected to the T-shaped plate (603). A dual-axis electric push rod (608) is fixedly installed on the inner wall of the hollow frame plate (602). Covers (609) are fixedly installed on both sides of the driving end of the dual-axis electric push rod (608). The outer walls of the covers (609) on both sides abut against the outer wall of the pipe pile.

2. A loading and unloading process for hoisting large pipe pile sections, applied to the special lifting equipment for hoisting large pipe pile sections as described in claim 1, characterized in that, Includes the following steps: Step 1: Before hoisting the pipe pile, the dual-axis motor (501) drives the two rotating shafts (506) to rotate in the forward direction. The two connecting parts (507) rotate synchronously with the rotating shaft (506) and drive the arc surface trajectory of the two arc-shaped winglets (508) to slide along the outer wall of the two guide blocks (509). This further drives the two convex parts (505) to slide towards the inner wall of the two hollow sleeves (503), and generates compression deformation on the two connecting springs (504), and accumulates a certain elastic potential energy, so that the two convex parts (505) are housed in the inner wall of the two hollow sleeves (503). The two side covers (609) are moved on both sides of the inner wall of the dual-axis electric push rod (608) by driving the dual-axis electric push rod (608) to adjust and adapt to the size of the pipe pile. Step 2: When transferring and hoisting the pipe pile, the pipe pile is installed on the lower outer wall of the main boom (1), and the two rotating shafts (506) are rotated in the opposite direction by the reverse drive of the dual-shaft motor (501). The arc surfaces of the two arc-shaped winglets (508) slide in the opposite direction along the outer walls of the two guide blocks (509), so that the two convex parts (505) move outward along the inner walls of the two hollow sleeves (503). Under the release of the elastic potential energy accumulated by the two connecting springs (504), the two convex parts (505) are popped out along the inner walls of the hollow sleeves (503). Corresponding to the inner wall of the pipe pile, the support (510) is popped out to face the inner wall of the pipe pile by the convex parts (505), and the contact process with the pipe pile is made more stable by the setting of the rubber strip (511). Step 3: According to the diameter and length of the pipe pile, firstly, the two side coverings (609) are driven to move outward and match and attach to the outer wall of the pipe pile by the dual-axis electric push rod (608). The outer wall of the pipe pile of the corresponding length generates a squeezing force on the hollow frame plate (602), causing the hollow frame plate (602) to slide along the outer wall of the dual-axis track (601). The T-shaped plate (603) slides along the inner wall of the sleeve frame (604) by the telescopic rods (606) and the protrusions (605) on both sides. The T-shaped plate (603) generates a squeezing force on the two sets of compensating springs (607) inside the sleeve frame (604) and deforms, so that the outer wall of the hollow frame plate (602) is tightly attached to the outer end of the pipe pile, ensuring the tight stability of the pipe pile end. After the installation is completed, the hoisting equipment is connected to the hoisting lug (2) through the hook to hoist the pipe pile to the designated position. Step 4: Finally, when the pipe pile is removed, the dual-axis electric push rod (608) drives the two side covers (609) to move up and down to the sides and pushes the hollow frame plate (602) outward to release the lock on the end of the pipe pile; Here, the dual-axis motor (501) drives the two rotating shafts (506) to rotate in the forward direction, repeating step one, so that the two convex parts (505) are housed in the inner wall of the two hollow sleeves (503), driving the two support parts (510) away from the inner wall of the pipe pile, releasing the support of the pipe pile, and finally removing the pipe pile from the main boom (1) to complete the loading and unloading.

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