Large pipe pile hoisting system and hoisting method

Abstract

The present invention relates to the technical field of large pipe pile hoisting, and discloses a large pipe pile hoisting system and hoisting method, including a mobile frame mechanism, a clamping mechanism for clamping the large pipe pile arranged horizontally on the left and right sides, and a lifting mechanism arranged horizontally on the front and back sides, the left and right clamping mechanisms are respectively slidably connected to the left and right sides of the front and back lifting mechanisms, and a driving mechanism is also provided on the lifting seat, and the driving mechanism is used to drive the left and right clamping mechanisms to slide closer or farther from each other along the lifting seat synchronously. The present invention can synchronously clamp and fix the bottom of the large pipe pile and the top of both ends of the large pipe pile, so as to effectively prevent the large pipe pile from falling during hoisting, and avoid external force on the large pipe pile when directly hoisting the large pipe pile, resulting in damage to the large pipe pile; and after the hoisting is completed, the large pipe pile can be stably placed on the ground while canceling the clamping and fixing of the large pipe pile, so that the operation is not only convenient, but also can prevent the large pipe pile from colliding with the ground and preventing the large pipe pile from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of large pipe pile hoisting, in particular to a large pipe pile hoisting system and a hoisting method. Background Art

[0002] Prestressed concrete large-diameter pipe piles (referred to as "large pipe piles") use a composite process combining centrifugal, vibration, and roller compaction to form concrete pipe sections. They are an ideal pile foundation structure for marine engineering buildings and are widely used in pile foundations of coastal high-pile wharf projects. Generally, large pipe piles are hoisted directly by cranes. In this way, when the crane's hoisting rope directly applies tension to the large pipe piles, the large pipe piles may be damaged by external forces. In addition, there is a lack of clamping protection during the hoisting process. After the hoisting is completed, the large pipe piles cannot be placed stably on the ground, which can easily cause damage to the large pipe piles. For this reason, we have introduced a large pipe pile hoisting system and hoisting method. Summary of the invention

[0003] The object of the present invention is to provide a large pipe pile hoisting system and a hoisting method to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A large pipe pile hoisting system comprises a mobile frame mechanism, a clamping mechanism for clamping the large pipe pile arranged horizontally on the left and right sides, and a lifting mechanism arranged horizontally on the front and rear sides, wherein the left and right clamping mechanisms are respectively slidably connected to the left and right sides of the front and rear lifting mechanisms, and the lifting mechanism comprises a lifting seat and a supporting plate arranged on the outer side of the middle part of the lifting seat, and the lifting seat is also provided with a driving mechanism, and the driving mechanism is used to drive the left and right clamping mechanisms to slide synchronously along the lifting seat to move closer to or away from each other;

[0006] The mobile frame mechanism is a mobile frame with two front and rear sets of fixed connections at the bottom with universal wheels. The inner wall of the mobile frame is provided with a slot for slidingly connecting the lifting seat. A platform is provided in the center of the bottom of the slot. The left and right ends of the platform are provided with downwardly inclined slopes. The middle of the slot is also provided with a vertical through slot for extending the abutment plate.

[0007] The driving mechanism drives the left and right clamping mechanisms to slide close to each other, so that the left and right clamping mechanisms clamp the large pipe pile from the left and right sides of the bottom of the large pipe pile. At the same time, the bottom of the clamping mechanism moves to the platform via the slope, so that the clamping mechanism, the driving mechanism, the lifting mechanism and the large pipe pile move upward as a whole;

[0008] At this time, the abutment plate moves upward along the vertical through slot, so that the abutment plate pushes the rotation limiting mechanism on the top of the movable frame to clamp and fix the large pipe pile from the top of the front and rear ends of the large pipe pile.

[0009] Preferably, the clamping mechanism includes a horizontal plate arranged horizontally on the left and right sides, a support wheel installed in the middle of the upper end of the horizontal plate through a mounting seat symmetrically distributed front and rear, a clamping inclined plate connected in the middle of the horizontal plate, a sliding seat fixed at both ends of the horizontal plate by an L-shaped connecting plate, a rack fixed in the middle of the upper end of the sliding seat, and a support seat fixed in the middle of the lower end of the sliding seat, the inclined surface of the lower end of the support seat is consistent with the inclination of the slope, and a horizontal support block is provided at the bottom end of the support seat.

[0010] Preferably, rectangular grooves for slidingly connecting the sliding seat are provided inside the left and right ends of the lifting seat, top grooves for extending the rack are provided at the top of the left and right ends of the lifting seat, inner side grooves for slidingly connecting the L-shaped connecting plate are provided on the inner walls of the left and right ends of the lifting seat, and bottom grooves for extending the supporting seat are provided at the bottom of the left and right ends of the lifting seat.

[0011] Preferably, the driving mechanism comprises two sets of rotating shafts arranged horizontally on the left and right sides, a first gear and a second gear fixed in sequence at both ends of the rotating shafts, and a third gear and a fourth gear fixed to the inner wall of the vertical plate at the upper end of the plate by two sets of connecting shafts on the left and right sides;

[0012] The front and rear third gears are meshed with each other, and the fourth gear is connected to the corresponding first gear through a chain, and the second gear is meshed with the upper end of the corresponding rack;

[0013] The two ends of the rotating shaft are movably connected to the vertical plate on the outer side of the top of the lifting seat.

[0014] Preferably, the driving mechanism also includes a worm gear mechanism for driving the corresponding third gear to rotate.

[0015] Preferably, the worm gear mechanism includes a corresponding connecting shaft extending through the vertical plate and then fixed to a worm gear, and a worm gear meshed with the upper end of the worm gear.

[0016] Preferably, one end of the worm is connected to a driving shaft, and the driving shaft passes through a connecting ear plate on the side of the corresponding vertical plate and is then connected to a handwheel or a motor.

[0017] Preferably, the rotation limiting mechanism comprises an L-shaped abutment member movably connected between the vertical plates at the top of the moving frame through a pin shaft, a connecting arm connected to the inner end of the L-shaped abutment member through the top plate, and an arc-shaped clamping plate fixed to the inner end of the connecting arm;

[0018] A horizontal plate is provided in the middle of the inner side wall at the upper end of the moving frame, a spring is provided between the top plate and the horizontal plate, and the bottom of the L-shaped abutment member is located above the abutment plate.

[0019] Preferably, lifting rings are installed on the top of the outer end of the abutment plate and on both left and right sides of the top of the movable frame.

[0020] The present invention also provides a hoisting method for a large pipe pile hoisting system, which specifically comprises the following steps:

[0021] S1. Move the mobile frame mechanism to the top of the large pipe pile, and drive the left and right clamping mechanisms to slide away from each other synchronously along the lifting seat through the driving mechanism. At the same time, the clamping mechanism, driving mechanism and lifting mechanism are moved down to the lowest position as a whole;

[0022] S2, the driving mechanism drives the left and right clamping mechanisms to slide close to each other, so that the left and right clamping mechanisms clamp the large pipe pile from the left and right sides of the bottom of the large pipe pile, and at the same time, the clamping mechanism, the driving mechanism, the lifting mechanism and the large pipe pile move upward as a whole;

[0023] S3, the abutment plate moves upward along the vertical through groove to push the rotation limiting mechanism on the top of the movable frame to clamp and fix the large pipe pile from the top of the front and rear ends of the large pipe pile.

[0024] Compared with the prior art, the beneficial effect of the present invention is that the driving mechanism of the present invention drives the left and right clamping mechanisms to slide close to each other, so that the left and right clamping mechanisms clamp the large pipe pile from the left and right sides of the bottom of the large pipe pile. At this time, the abutment plate moves up along the vertical through groove, so that the abutment plate pushes the rotating limiting mechanism on the top of the movable frame to clamp and fix the large pipe pile from the top of the front and rear ends of the large pipe pile. In this way, the bottom of the large pipe pile and the tops of both ends of the large pipe pile can be clamped and fixed simultaneously, so as to effectively prevent the large pipe pile from falling during hoisting, and avoid external force on the large pipe pile that may cause damage to the large pipe pile when directly hoisting the large pipe pile; at the same time, the large pipe pile receives sufficient clamping support, and the force is relatively uniform during hoisting, and it is not easy to be damaged; while the large pipe pile is clamped and fixed, the bottom of the clamping mechanism moves to the platform via the slope, so that the clamping mechanism, the driving mechanism, the lifting mechanism and the large pipe pile move upward as a whole, so that the position of the large pipe pile is lifted off the ground, which is convenient for the movement of the large pipe pile before hoisting; and after the hoisting is completed, the large pipe pile can be stably placed on the ground while the clamping and fixing of the large pipe pile is cancelled. Such operation is not only convenient, but also can prevent the large pipe pile from colliding with the ground, thereby preventing the large pipe pile from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall decomposition structure of the present invention;

[0026] Figure 2 It is a three-dimensional structural schematic diagram of the clamping mechanism of the present invention;

[0027] Figure 3 It is a schematic diagram of the exploded structure of the driving mechanism of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the second gear meshing with the rack of the present invention;

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the worm gear mechanism of the present invention;

[0030] Figure 6 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection between the clamping mechanism and the lifting mechanism of the present invention;

[0032] Figure 8 It is a schematic diagram of the exploded structure of the assembly of the rotation limiting mechanism and the moving frame mechanism of the present invention;

[0033] Fig. 9 This is a schematic cross-sectional view of the large pipe pile after being clamped and fixed according to the present invention;

[0034] Fig.10 This is a structural schematic diagram of the initial position of the support base of the present invention;

[0035] Fig.11 It is a structural schematic diagram of the support base of the present invention sliding along the slope to the platform;

[0036] Fig.12 For the present invention Fig.11 Schematic diagram of the three-dimensional structure;

[0037] Fig.13 It is a schematic cross-sectional view of the structure when the rotation limiting mechanism of the present invention clamps the top of the large pipe pile.

[0038] In the figure: 1. Clamping mechanism; 101. Horizontal plate; 102. Mounting seat; 103. Support wheel; 104. L-shaped connecting plate; 105. Support seat; 106. Horizontal support block; 107. Sliding seat; 108. Rack; 109. Clamping inclined plate; 2. Driving mechanism; 201. Rotating shaft; 202. First gear; 203. Second gear; 204. Connecting shaft; 205. Fourth gear; 206. Third gear; 207. Chain; 208. Hand wheel; 209. Driving shaft; 210. Worm wheel; 211. Worm; 3. Lifting mechanism; 301. Lifting seat; 302. Abutment plate; 303, bottom groove; 304, inner groove; 305, top groove; 306, vertical plate; 307, upright plate; 308, connecting ear plate; 4, large pipe pile; 5, rotation limit mechanism; 501, L-shaped abutment member; 502, top plate; 503, connecting arm; 504, arc-shaped clamping plate; 505, pin shaft; 506, spring; 6, mobile frame mechanism; 601, mobile frame; 602, universal wheel; 603, vertical through groove; 604, vertical plate; 605, horizontal plate; 606, fixed frame; 607, slot; 608, platform; 609, slope; 7, lifting ring. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-13 , the present invention provides a technical solution:

[0041] A large pipe pile hoisting system, comprising a mobile frame mechanism 6, a clamping mechanism 1 horizontally arranged left and right for clamping a large pipe pile 4, and a lifting mechanism 3 horizontally arranged front and back;

[0042] like Figure 2 and 7 As shown, the clamping mechanism 1 includes a horizontal plate 101 arranged horizontally on the left and right sides, a support wheel 103 installed on the middle part of the upper end of the horizontal plate 101 through a mounting seat 102 symmetrically distributed front and back, a clamping inclined plate 109 connected to the middle part of the horizontal plate 101, a slide 107 fixed to the two ends of the horizontal plate 101 by an L-shaped connecting plate 104, a rack 108 fixed to the middle part of the upper end of the slide 107 and a support seat 105 fixed to the middle part of the lower end of the slide 107, the inclined surface of the lower end of the support seat 105 is consistent with the inclination of the slope 609, and a horizontal support block 106 is provided at the bottom end of the support seat 105.

[0043] The left and right clamping mechanisms 1 are respectively slidably connected to the left and right sides of the front and rear lifting mechanisms 3. The lifting mechanism 3 includes a lifting seat 301 and a support plate 302 provided on the outer side of the middle part of the lifting seat 301.

[0044] Rectangular grooves for slidingly connecting the sliding seat 107 are provided inside the left and right ends of the lifting seat 301, top grooves 305 for extending the rack 108 are provided at the top of the left and right ends of the lifting seat 301, inner side grooves 304 for slidingly connecting the L-shaped connecting plate 104 are provided on the inner walls of the left and right ends of the lifting seat 301, and bottom grooves 303 for extending the supporting seat 105 are provided at the bottom of the left and right ends of the lifting seat 301.

[0045] The lifting seat 301 is also provided with a driving mechanism 2, which is used to drive the left and right clamping mechanisms 1 to slide synchronously along the lifting seat 301 to move closer to or away from each other;

[0046] like Figure 3 and 4 As shown, the driving mechanism 2 includes two sets of rotating shafts 201 arranged horizontally on the left and right sides, a first gear 202 and a second gear 203 fixed in sequence at both ends of the rotating shaft 201, and a third gear 206 and a fourth gear 205 fixed to the inner wall of the vertical plate 307 at the upper end of the plate 302 through two sets of connecting shafts 204 on the left and right sides;

[0047] The front and rear third gears 206 are meshed with each other, and the fourth gear 205 is connected to the corresponding first gear 202 through a chain 207, and the second gear 203 is meshed with the upper end of the corresponding rack 108;

[0048] Both ends of the rotating shaft 201 are movably connected to the vertical plate 306 on the outer side of the top of the lifting seat 301.

[0049] The driving mechanism 2 further includes a worm gear mechanism for driving the corresponding third gear 206 to rotate.

[0050] The worm gear mechanism includes a worm gear 210 to which the corresponding connecting shaft 204 extends through the vertical plate 307 and is fixed, and a worm gear 211 meshed with the upper end of the worm gear 210 .

[0051] One end of the worm 211 is connected to a driving shaft 209 , and the driving shaft 209 passes through a connecting ear plate 308 on the side of the corresponding vertical plate 307 and is then connected to a hand wheel 208 or a motor.

[0052] The motor works to drive the worm 211 to rotate through the drive shaft 209, or the hand wheel 208 is manually rotated so that the hand wheel 208 drives the worm 211 to rotate through the drive shaft 209;

[0053] The mobile frame mechanism 6 is a front and rear set of mobile frames 601 that are fixedly connected and have universal wheels 602 at the bottom. The front and rear sets of mobile frames 601 are fixedly connected by fixed frames 606 connected to the left and right sides thereof.

[0054] The inner wall of the moving frame 601 is provided with a slot 607 for slidingly connecting the lifting seat 301, a platform 608 is provided in the center of the bottom of the slot 607, and downwardly inclined slopes 609 are provided at the left and right ends of the platform 608. A vertical through slot 603 for extending out of the abutment plate 302 is also provided in the middle of the slot 607;

[0055] The driving mechanism 2 drives the left and right clamping mechanisms 1 to slide close to each other, so that the left and right clamping mechanisms 1 clamp the large pipe pile 4 from the left and right sides of the bottom of the large pipe pile 4. At the same time, the bottom of the clamping mechanism 1 moves to the platform 608 via the slope 609, so that the clamping mechanism 1, the driving mechanism 2, the lifting mechanism 3 and the large pipe pile 4 move upward as a whole.

[0056] At this time, the abutment plate 302 moves upward along the vertical through slot 603 , so that the abutment plate 302 pushes the rotation limiting mechanism 5 on the top of the movable frame 601 to clamp and fix the large pipe pile 4 from the top of the front and rear ends of the large pipe pile 4 .

[0057] like Figure 8As shown, the rotation limiting mechanism 5 includes an L-shaped abutment member 501 movably connected between the vertical plates 604 on the top of the moving frame 601 through a pin shaft 505, a connecting arm 503 connected to the inner end of the L-shaped abutment member 501 through a top plate 502, and an arc-shaped clamping plate 504 fixed to the inner end of the connecting arm 503;

[0058] A horizontal plate 605 is provided in the middle of the inner side wall at the upper end of the moving frame 601 , a spring 506 is provided between the top plate 502 and the horizontal plate 605 , and the bottom of the L-shaped abutment member 501 is located above the abutment plate 302 .

[0059] Under the elastic force of the spring 506 on the top plate 502, the arc-shaped clamping plate 504 is at the highest position.

[0060] The top of the outer end of the abutment plate 302 and the left and right sides of the top of the moving frame 601 are all equipped with lifting rings 7. In this way, after the large pipe pile 4 is clamped and fixed by the clamping mechanism 1 and the rotation limiting mechanism 5, the lifting rope on the crane is connected to the lifting ring 7, and the large pipe pile 4 can be lifted stably.

[0061] The present invention also provides a hoisting method for a large pipe pile hoisting system, which specifically comprises the following steps:

[0062] S1, move the mobile frame mechanism 6 to the top of the large pipe pile 4, and drive the left and right clamping mechanisms 1 to slide away from each other along the lifting seat 301 through the driving mechanism 2. At the same time, the clamping mechanism 1, the driving mechanism 2 and the lifting mechanism 3 are moved down to the lowest position as a whole;

[0063] S2, the driving mechanism 2 drives the left and right clamping mechanisms 1 to slide close to each other, so that the left and right clamping mechanisms 1 clamp the large pipe pile 4 from the left and right sides of the bottom of the large pipe pile 4, and at the same time, the clamping mechanism 1, the driving mechanism 2, the lifting mechanism 3 and the large pipe pile 4 move upward as a whole;

[0064] S3, the abutment plate 302 moves upward along the vertical through slot 603 to push the rotation limiting mechanism 5 on the top of the movable frame 601 to clamp and fix the large pipe pile 4 from the top of the front and rear ends of the large pipe pile 4.

[0065] Specifically, when in use, since the universal wheels 602 are installed at the bottom of the mobile frame 601, the mobile frame mechanism 6 can be moved at will;

[0066] like Fig.10 As shown, in the initial state, the support seat 105 is located on the left and right sides of the platform 608, and the inclined surface on the support seat 105 has not yet contacted the slope 609. At this time, the distance between the left and right clamping mechanisms 1 is the farthest, and the left and right clamping mechanisms 1 are closest to the ground;

[0067] Move the mobile frame mechanism 6 to the vicinity of the large pipe pile 4, and make the large pipe pile 4 located inside the mobile frame mechanism 6;

[0068] Then the worm 211 is driven to rotate by the driving shaft 209, so that the worm 211 drives the worm wheel 210 to rotate, and the worm wheel 210 drives the fourth gear 205 and the third gear 206 thereon to rotate simultaneously through the corresponding connecting shaft 204;

[0069] Since the front and rear third gears 206 are meshed with each other, the left and right fourth gears 205 and the left and right third gears 206 on the lifting mechanism 3 rotate simultaneously;

[0070] At this time, the fourth gear 205 drives the first gear 202 to rotate through the chain 207, and the first gear 202 drives the second gear 203 to rotate on the upper end of the rack 108 through the rotating shaft 201, so that the slide 107 moves into the rectangular groove inside the lifting seat 301 through the rack 108, so that the slides 107 at the left and right ends of the same lifting seat 301 are synchronously close to each other;

[0071] Thus, the front and rear sets of slide seats 107 and the horizontal plate 101 move together as a whole, so that the left and right clamping mechanisms 1 are synchronously moved closer to each other;

[0072] At this time, the clamping inclined plate 109 scoops up the large pipe pile 4 from the left and right sides of the bottom of the large pipe pile 4;

[0073] Then, when the inclined surface on the support seat 105 contacts the slope 609 and until the horizontal support block 106 slides to the upper surface of the platform 608, the clamping mechanism 1, the driving mechanism 2 and the lifting mechanism 3 move upward as a whole;

[0074] The distance between the left and right clamping mechanisms 1 is the shortest, so that the left and right clamping mechanisms 1 can clamp the large pipe pile 4 from the left and right sides of the bottom of the large pipe pile 4 (such as Fig. 9 shown);

[0075] The clamping mechanism 1, the driving mechanism 2, the lifting mechanism 3 and the large pipe pile 4 are moved upward as a whole, and the left and right sets of clamping mechanisms 1 are the highest from the ground, so as to lift the large pipe pile 4 away from the ground;

[0076] At the same time, when the clamping mechanism 1, the driving mechanism 2, the lifting mechanism 3 and the large pipe pile 4 move upward as a whole, the abutting plate 302 moves upward along the vertical through groove 603 until the top of the vertical plate 307 moves to the top of the vertical through groove 603;

[0077] During the process, the upper end of the abutment plate 302 contacts the lower end of the L-shaped abutment member 501, so that the abutment plate 302 pushes the connecting arm 503 and the arc clamping plate 504 to rotate as a whole with the pin shaft 505 as the center through the L-shaped abutment member 501, overcoming the elastic force of the spring 506, so that the spring 506 is in a compressed state, until the arc clamping plate 504 clamps the large pipe pile 4 from the top of the front and rear ends of the large pipe pile 4 (such as Fig.13 as shown).

[0078] After the lifting rope on the crane is connected to the lifting ring 7, the large pipe pile 4 can be lifted steadily. This lifting method makes the crane not directly lift the large pipe pile 4, thereby avoiding external force on the large pipe pile 4 and causing damage to the large pipe pile 4 when directly lifting the large pipe pile 4;

[0079] When hoisting is performed through the lifting ring 7 on the supporting plate 302 , the supporting plate 302 always exerts an upward thrust on the L-shaped supporting member 501 , thereby ensuring that the arc-shaped clamping plate 504 is always clamped and fixed on the top of the large pipe pile 4 .

[0080] After the lifting is completed, the lifting rope is removed and connected to the lifting ring 7, and the large pipe pile 4 is moved to an appropriate position by moving the moving frame mechanism 6. Then, the driving shaft 209 drives the worm 211 to rotate in the opposite direction, so that the second gear 203 drives the slide 107 to move outside the rectangular groove inside the lifting seat 301 through the rack 108, so that the slides 107 at the left and right ends of the same lifting seat 301 are synchronously moved away from each other, and the left and right clamping mechanisms 1 are synchronously moved away from each other;

[0081] At this time, the horizontal support block 106 slides along the slope 609 to Fig.10 At the initial position shown, the clamping mechanism 1, the driving mechanism 2 and the lifting mechanism 3 are moved downward as a whole and lowered to the lowest position, so that the left and right clamping mechanisms 1 release the large pipe pile 4 to the ground, and then the mobile frame mechanism 6 is moved away from above the large pipe pile 4 to complete the lifting and transportation of the large pipe pile 4;

[0082] The process of releasing the large pipe pile 4 to the ground is that the left and right clamping mechanisms 1 move away from each other synchronously while the height of the left and right clamping mechanisms 1 is lowered. When the left and right clamping mechanisms 1 are farthest apart, the height of the left and right clamping mechanisms 1 is lowest, so that when the left and right clamping mechanisms 1 no longer clamp the large pipe pile 4, the large pipe pile 4 is released to the ground. Such operation is not only convenient, but also can prevent the large pipe pile 4 from colliding with the ground and preventing the large pipe pile 4 from being damaged.

[0083] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large pipe pile hoisting system, comprising a mobile frame mechanism, a clamping mechanism arranged horizontally on the left and right sides for clamping the large pipe pile, and a lifting mechanism arranged horizontally on the front and back sides, characterized in that: The left and right clamping mechanisms are respectively slidably connected to the left and right sides of the front and rear lifting mechanisms. The lifting mechanism includes a lifting seat and a support plate provided on the outer side of the middle of the lifting seat. The lifting seat is also provided with a driving mechanism, which is used to drive the left and right clamping mechanisms to slide closer to or away from each other synchronously along the lifting seat. The mobile frame mechanism is a mobile frame with two front and rear sets of fixed connections at the bottom with universal wheels. The inner wall of the mobile frame is provided with a slot for slidingly connecting the lifting seat. A platform is provided in the center of the bottom of the slot. The left and right ends of the platform are provided with downwardly inclined slopes. The middle of the slot is also provided with a vertical through slot for extending the abutment plate. The driving mechanism drives the left and right clamping mechanisms to slide close to each other, so that the left and right clamping mechanisms clamp the large pipe pile from the left and right sides of the bottom of the large pipe pile. At the same time, the bottom of the clamping mechanism moves to the platform via the slope, so that the clamping mechanism, the driving mechanism, the lifting mechanism and the large pipe pile move upward as a whole; At this time, the abutment plate moves upward along the vertical through slot, so that the abutment plate pushes the rotation limiting mechanism on the top of the moving frame to clamp and fix the large pipe pile from the top of the front and rear ends of the large pipe pile; The clamping mechanism includes horizontal plates arranged horizontally on the left and right sides, a support wheel installed in the middle of the upper end of the horizontal plate through a mounting seat symmetrically distributed front and back, a clamping inclined plate connected in the middle of the horizontal plate, a slide seat fixed at both ends of the horizontal plate through an L-shaped connecting plate, a rack fixed in the middle of the upper end of the slide seat, and a support seat fixed in the middle of the lower end of the slide seat, the inclined surface at the lower end of the support seat is consistent with the inclination of the slope, and a horizontal support block is provided at the end of the bottom of the support seat; The left and right ends of the lifting seat are provided with rectangular grooves for slidingly connecting the sliding seat, the tops of the left and right ends of the lifting seat are provided with top grooves for extending the rack, the inner walls of the left and right ends of the lifting seat are provided with inner side grooves for slidingly connecting the L-shaped connecting plate, and the bottoms of the left and right ends of the lifting seat are provided with bottom grooves for extending the support seat; The driving mechanism comprises two sets of rotating shafts arranged horizontally on the left and right sides, a first gear and a second gear fixed in sequence at both ends of the rotating shafts, and a third gear and a fourth gear fixed to the inner wall of the vertical plate at the upper end of the plate by two sets of connecting shafts on the left and right sides; The front and rear third gears are meshed with each other, and the fourth gear is connected to the corresponding first gear through a chain, and the second gear is meshed with the upper end of the corresponding rack; The two ends of the rotating shaft are movably connected to the vertical plate on the outer side of the top of the lifting seat.

2. A large pipe pile hoisting system according to claim 1, characterized in that: The driving mechanism also includes a worm gear mechanism for driving the corresponding third gear to rotate.

3. A large pipe pile hoisting system according to claim 2, characterized in that: The worm gear mechanism comprises a worm gear fixed after a corresponding connecting shaft passes through and extends out of the vertical plate, and a worm gear meshed with the upper end of the worm gear.

4. A large pipe pile hoisting system according to claim 3, characterized in that: One end of the worm is connected to a driving shaft, and the driving shaft is connected to a hand wheel or a motor after passing through a connecting ear plate on the side of the corresponding vertical plate.

5. A large pipe pile hoisting system according to claim 1, characterized in that: The rotation limiting mechanism comprises an L-shaped abutment member movably connected between the vertical plates at the top of the moving frame through a pin shaft, a connecting arm whose inner end of the L-shaped abutment member is connected through the top plate, and an arc-shaped clamping plate fixed at the inner end of the connecting arm; A horizontal plate is provided in the middle of the inner side wall at the upper end of the moving frame, a spring is provided between the top plate and the horizontal plate, and the bottom of the L-shaped abutment member is located above the abutment plate.

6. A large pipe pile hoisting system according to claim 1, characterized in that: The top of the outer end of the abutting plate and the left and right sides of the top of the moving frame are all equipped with lifting rings.

7. A method for hoisting a large pipe pile hoisting system according to any one of claims 1 to 6, characterized in that: The specific steps include: S1. Move the mobile frame mechanism to the top of the large pipe pile, and drive the left and right clamping mechanisms to slide away from each other synchronously along the lifting seat through the driving mechanism. At the same time, the clamping mechanism, driving mechanism and lifting mechanism are moved down to the lowest position as a whole; S2, the driving mechanism drives the left and right clamping mechanisms to slide close to each other, so that the left and right clamping mechanisms clamp the large pipe pile from the left and right sides of the bottom of the large pipe pile, and at the same time, the clamping mechanism, the driving mechanism, the lifting mechanism and the large pipe pile move upward as a whole; S3, the abutment plate moves upward along the vertical through groove to push the rotation limiting mechanism on the top of the movable frame to clamp and fix the large pipe pile from the top of the front and rear ends of the large pipe pile.

Images