Pile head breaking device for wind power foundation prefabricated pipe pile

Abstract

The invention relates to a pile head breaking device for a wind power foundation prefabricated pipe pile, and relates to the technical field of pile head breaking, the pile head breaking device comprises a rack, an inner supporting assembly and an outer pressing assembly, the inner supporting assembly comprises an inner supporting block and a lifting piece, and the section of the inner supporting block in the axis direction is polygonal; the side edges of the inner supporting blocks are used for being supported at the positions, where main steel bars are located, in the prefabricated pipe pile in a one-to-one correspondence mode, the outer pressing assembly comprises an annular supporting frame, a first lifting part, a plurality of driving cylinders and a plurality of extrusion blocks, and the driving cylinders are used for driving the extrusion blocks to crush the portions, right opposite to the side walls of the inner supporting blocks, of the prefabricated pipe pile in a one-to-one correspondence mode; and a crushing assembly and a pressing and cutting assembly are arranged on each side wall of the inner supporting block and each extrusion block, the crushing assemblies are used for crushing the pipe wall after the prefabricated pipe pile is crushed, and the pressing and cutting assemblies are used for pressing and cutting the pipe wall after the prefabricated pipe pile is crushed. According to the method, the pile head of the prefabricated pipe pile can be rapidly broken, and the main steel bars at the pile head of the prefabricated pipe pile can be well reserved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile head breaking, and in particular to a pile head breaking device for a wind power foundation prefabricated pipe pile. BACKGROUND

[0002] Due to the advantages of high bearing capacity, high construction efficiency and low cost, prefabricated pipe piles are widely used as concrete piles for wind power foundations. After the installation of the prefabricated pipe pile is completed, the pile head part of the prefabricated pipe pile needs to be broken to enable the prefabricated pipe pile to be effectively anchored to the pile cap through the reinforcement.

[0003] At present, in order to quickly break the pile head of the prefabricated pipe pile, the pile head of the prefabricated pipe pile is mainly cut by a pile head cutting machine. Since the cutting ability of the blade of the pile head cutting machine is strong, the pile head cutting machine will usually cut off the main reinforcement and the concrete when cutting the pile head, so that the prefabricated pipe pile can only be connected to the pile cap through the reinforcement cage poured later. Although effective connection of the pile foundation and the pile cap is achieved, the anchoring strength will be lower than that of the direct connection of the main reinforcement of the prefabricated pipe pile and the pile cap. Therefore, there is an urgent need for a breaking device that can quickly break the pile head of the prefabricated pipe pile and perfectly preserve the main reinforcement at the pile head of the prefabricated pipe pile. SUMMARY

[0004] In order to quickly break the pile head of the prefabricated pipe pile and perfectly preserve the main reinforcement at the pile head of the prefabricated pipe pile, the present application provides a pile head breaking device for a wind power foundation prefabricated pipe pile.

[0005] The pile head breaking device for a wind power foundation prefabricated pipe pile provided by the present application adopts the following technical solution: A pile head breaking device for a wind power foundation prefabricated pipe pile, comprising: a rack; an inner support assembly comprising an inner support block and a lifting piece; the inner support block is connected to the rack through the lifting piece, the lifting piece is used to drive the inner support block to move up and down in the prefabricated pipe pile, and the cross section of the inner support block in the axial direction is a polygon; when the inner support block is located in the prefabricated pipe pile, the side edges of the inner support block are correspondingly supported at the positions where the internal main reinforcement is located; an outer pressing assembly comprising a ring support frame, a first lifting part, a plurality of driving cylinders and a plurality of pressing blocks; the ring support frame is connected to the rack through the first lifting part, the first lifting part is used to drive the ring support frame to move up and down, the ring support frame is used to be sleeved on the prefabricated pipe pile, the driving cylinders are connected to the ring support frame, and the pressing blocks are correspondingly connected to the movable ends of the driving cylinders; the driving cylinders are used to drive the pressing blocks to correspondingly crush the parts of the prefabricated pipe pile opposite to the side walls of the inner support block; The inner support block is provided with a breaking assembly and a cutting assembly on each side wall and each extruding block, the breaking assembly is used for breaking the pipe wall of the prefabricated pipe pile after being crushed, and the cutting assembly is used for cutting the pipe wall of the prefabricated pipe pile after being broken.

[0006] Optionally, the breaking assembly is arranged in a breaking cavity arranged in the inner support block or the extruding block, the breaking assembly comprises a breaking cylinder, a breaking plate and a plurality of breaking blocks, the breaking cylinder is connected to a cavity wall of the breaking cavity, the breaking plate is connected to a movable end of the breaking cylinder and is arranged to slide in the breaking cavity, and the plurality of breaking blocks are connected to the breaking plate and arranged to slide out of the inner support block or the extruding block; when the breaking cylinder is in a contracted state, end surfaces of the breaking blocks away from the breaking plate are flush with side surfaces of the inner support block or side surfaces of the extruding block.

[0007] Optionally, at least one reinforcing rod is arranged to pass through the breaking plate, both ends of the reinforcing rod are connected to the cavity wall of the breaking cavity, the breaking plate is connected to the reinforcing rod in a sliding manner, and the reinforcing rod is arranged to be dislocated from the breaking blocks.

[0008] Optionally, the cutting assembly comprises a plurality of cutting blocks and a power unit, the plurality of cutting blocks are connected to top ends of the inner support block or the extruding block, the cutting blocks are provided with cutting edges, the power unit is arranged on the inner support block or the extruding block, the power unit is used to drive all the cutting blocks to cut the pipe wall of the prefabricated pipe pile through the cutting edges, and the cutting blocks on the inner support block are arranged to be dislocated from the cutting blocks on the extruding block.

[0009] Optionally, the cutting blocks are hinged to the top ends of the inner support block or the extruding block, the power unit comprises a plurality of push blocks and a plurality of top blocks, the plurality of push blocks and the plurality of top blocks are arranged to be one-to-one corresponding, the push blocks are one-to-one corresponding to the cutting blocks of the cutting assemblies close to the push blocks, the push blocks are arranged in power grooves arranged on top surfaces of the inner support block or the extruding block, the power grooves are communicated with the breaking cavities, the push blocks are connected to the breaking plate, the top blocks are arranged to slide in the power grooves, the top blocks are provided with power inclined surfaces, and the push blocks are abutted on the power inclined surfaces; when the push blocks slide with the breaking plate, the push blocks drive the top blocks to turn the cutting blocks to the pipe wall of the prefabricated pipe pile through the power inclined surfaces.

[0010] Optionally, torsional springs are arranged at the hinge positions of the cutting blocks, and the torsional springs are used to drive the cutting blocks to turn away from the pipe wall of the prefabricated pipe pile.

[0011] Optionally, the lifting member is a hydraulic multi-stage telescopic cylinder.

[0012] Optionally, the first lifting unit comprises a plurality of winding shafts and a plurality of lifting ropes, the plurality of winding shafts and the plurality of lifting ropes are arranged to be one-to-one corresponding, the plurality of winding shafts are arranged to rotate and are connected to the rack, one end of each of the plurality of lifting ropes is connected to and wound on the winding shaft, and the other end of each of the plurality of lifting ropes is connected to the ring support frame.

[0013] Optionally, the winding shaft is connected with a worm gear, the worm gear is engaged with a worm connected to the frame in rotation, the worm is connected with a first bevel gear, all the first bevel gears are engaged with a second bevel gear, and the second bevel gear is connected with a lifting motor installed on the frame.

[0014] Optionally, a plurality of lifting rings are arranged around the frame.

[0015] In summary, the present application has at least one of the following beneficial technical effects: The pile head breaking device for the wind power foundation prefabricated pipe pile comprises a frame, an inner support assembly, an outer pressing assembly, a breaking assembly and a pressing and cutting assembly. The inner support block can be inserted into the prefabricated pipe pile to support the main reinforcement of the prefabricated pipe pile by the side edges thereof. The extrusion block can crush the pipe wall of the prefabricated pipe pile on the side wall of the inner support block under the driving of the driving cylinder. Since the main reinforcement of the prefabricated pipe pile is protected by the side edges of the inner support block, the main reinforcement of the prefabricated pipe pile is not easily damaged in the crushing process. After the pipe wall of the prefabricated pipe pile is crushed, the breaking cylinder drives the breaking block to slide, so that the breaking block crushes the pipe wall of the prefabricated pipe pile. Then, the breaking block and the extrusion block are reset, the inner support block and the ring support frame are lowered, and the process of crushing the pipe wall of the prefabricated pipe pile by the extrusion block and crushing the pipe wall of the prefabricated pipe pile by the breaking block is repeated. In the process of crushing by the breaking block, the pressing and cutting block is driven by the breaking plate to turn to the pipe wall of the prefabricated pipe pile. The pressing and cutting block can cut the steel wires and pipe wall fragments hanging between the main reinforcements of the prefabricated pipe pile by the pressing and cutting blade, so that the pipe wall of the prefabricated pipe pile is separated from the main reinforcement, thereby the pile head of the prefabricated pipe pile can be quickly broken, and the main reinforcement at the pile head of the prefabricated pipe pile can be well reserved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the embodiment of the present application installed on a prefabricated pipe pile; Figure 2 is a structural schematic view of the embodiment of the present application; Figure 3 is a structural schematic view of the inner support assembly and the outer pressing assembly; Figure 4 is a structural schematic view of the breaking assembly and the pressing and cutting assembly on the inner support block; Figure 5 is a structural schematic view of the breaking assembly and the pressing and cutting assembly on the extrusion block.

[0017] REFERENCE SIGNS: 1, rack; 11, lifting ring; 2, inner support assembly; 21, inner support block; 211, crushing cavity; 212, power groove; 22, lifting piece; 3, outer pressing assembly; 31, ring support frame; 32, first lifting part; 321, winding shaft; 322, lifting rope; 323, worm gear; 324, worm; 325, first bevel gear; 326, second bevel gear; 327, lifting motor; 328, dust cover; 33, drive cylinder; 34, extrusion block; 4, crushing assembly; 41, crushing cylinder; 42, crushing plate; 43, crushing block; 44, reinforcing rod; 5, pressure cutting assembly; 51, pressure cutting block; 511, pressure cutting blade; 52, power part; 521, push block; 522, top block; 5221, power inclined surface; 523, torsional spring. DETAILED DESCRIPTION

[0018] The following description will be made in conjunction with the accompanying drawings. Figures 1-5 The application is further described in detail.

[0019] The application discloses a pile head breaking device for a wind power foundation prefabricated pipe pile. Figure 1 A pile head breaking device for a wind power foundation prefabricated pipe pile comprises a rack 1, an inner support assembly 2 and an outer pressing assembly 3.

[0020] The rack 1 is supported on the ground where the prefabricated pipe pile is located.

[0021] The inner support assembly 2 comprises an inner support block 21 and a lifting piece 22.

[0022] The inner support block 21 is connected to the rack 1 through the lifting piece 22, the lifting piece 22 is used to drive the inner support block 21 to move up and down in the prefabricated pipe pile, the cross section of the inner support block 21 along the axial direction is a polygon, when the inner support block 21 is located in the prefabricated pipe pile, the side edges of the inner support block 21 are correspondingly supported at the positions where the main steel bars in the prefabricated pipe pile are located; the side edges of the inner support block 21 can form a support at the main steel bars of the prefabricated pipe pile, so that the main steel bars of the prefabricated pipe pile are not easy to bend.

[0023] The outer pressing assembly 3 comprises a ring support frame 31, a first lifting part 32, a plurality of drive cylinders 33 and a plurality of extrusion blocks 34.

[0024] The ring support frame 31 is connected to the rack 1 through the first lifting part 32, the first lifting part 32 is used to drive the ring support frame 31 to move up and down, the ring support frame 31 is used to be sleeved on the prefabricated pipe pile; the drive cylinders 33 are fixedly connected to the ring support frame 31, the extrusion blocks 34 are correspondingly fixedly connected to the movable ends of the drive cylinders 33, the drive cylinders 33 are used to drive the extrusion blocks 34 to correspondingly crush the positions opposite to the side walls of the inner support block 21; the circular arc wall of the prefabricated pipe pile is easy to be crushed by the extrusion blocks 34 because of the space left between the circular arc wall and the side walls of the inner support block 21; in this embodiment, the drive cylinders 33 are hydraulic cylinders.

[0025] wherein, referring to Figure 2 , the breaking assembly 4 is arranged on each side wall of the inner support block 21 and each extrusion block 34, and the crushing and cutting assembly 5 is arranged on each side wall of the inner support block 21 and each extrusion block 34, the breaking assembly 4 is used to break the pipe wall of the precast pipe pile after crushing, and the crushing and cutting assembly 5 is used to crush and cut the pipe wall of the precast pipe pile after breaking.

[0026] In use, the lifting piece 22 drives the inner support block 21 to be inserted into the precast pipe pile, so that the side edges of the inner support block 21 can face and support the main reinforcement inside the precast pipe pile, the first lifting part 32 drives the ring support frame 31 to move downward, so that the extrusion block 34 can be moved to the position facing the inner support block 21, and the driving cylinder 33 can drive the extrusion block 34 to extrude the pipe wall of the precast pipe pile. Since there is a space between the pipe wall of the precast pipe pile and the side wall of the inner support block 21, the extrusion block 34 is easy to crush the pipe wall of the precast pipe pile and abut against the side wall of the inner support block 21. Since the side edges of the inner support block 21 can support the main reinforcement of the precast pipe pile, the main reinforcement of the precast pipe pile is not easy to be bent under pressure, so that the application can crush the pipe wall of the precast pipe pile under the condition that the main reinforcement of the precast pipe pile is protected.

[0027] After the pipe wall of the precast pipe pile is crushed, the breaking assembly 4 arranged on the inner support block 21 and the extrusion block 34 can break the crushed pipe wall. Since the pipe wall of the precast pipe pile is already in a crushed state, the breaking assembly 4 can break the pipe wall of the precast pipe pile without punching holes in the pipe wall of the precast pipe pile.

[0028] After the pipe wall of the precast pipe pile is broken, since there are spiral steel wires in the pipe wall of the precast pipe pile in addition to the main reinforcement, the broken pipe wall of the precast pipe pile will still be hung on the main reinforcement. The crushing and cutting assembly 5 arranged on the inner support block 21 and the extrusion block 34 can crush and cut the broken pipe wall of the precast pipe pile, so that the steel wires and the broken pipe wall of the precast pipe pile can be separated from the main reinforcement, so that the above process is repeated on the pipe wall of the precast pipe pile from top to bottom, so that the pipe wall of the precast pipe pile head can be quickly broken without damaging the main reinforcement.

[0029] Based on the above analysis, the extrusion block 34 can crush the pipe wall of the precast pipe pile under the condition that the main reinforcement of the precast pipe pile is protected, the breaking assembly 4 is easy to break the crushed pipe wall of the precast pipe pile, and the crushing and cutting assembly 5 is easy to cut the broken pipe wall of the precast pipe pile. Therefore, through crushing, breaking and cutting, the pipe wall of the precast pipe pile head can be quickly broken, and the main reinforcement at the precast pipe pile head can be well preserved.

[0030] Specifically, referring to Figures 3-5 , the breaking assembly 4 is arranged in the breaking cavity 211 opened in the inner support block 21 or the extrusion block 34, and the breaking assembly 4 comprises a breaking cylinder 41, a breaking plate 42 and a breaking block 43.

[0031] Referring toFigure 4 and Figure 5 The crushing cylinder 41 is fixed to the cavity wall of the crushing cavity 211, the crushing plate 42 is fixed to the movable end of the crushing cylinder 41, the crushing plate 42 is slidingly arranged in the crushing cavity 211, the crushing blocks 43 are arranged in plurality and are all fixed to the side of the crushing plate 42 away from the crushing cylinder 41, the crushing blocks 43 slidingly pass through the inner supporting block 21 or the extruding block 34, when the crushing cylinder 41 is in the contracted state, the end surface of the crushing blocks 43 away from the crushing plate 42 is flush with the side surface of the inner supporting block 21 or the side surface of the extruding block 34.

[0032] Referring to Figure 4 In the embodiment, the crushing cylinder 41 is a hydraulic cylinder; the side of the crushing plate 42 close to the crushing cylinder 41 is attached to the cavity wall of the crushing cavity 211; the number of the crushing blocks 43 is six and they are arranged in two rows and three columns.

[0033] After the pipe wall of the precast pipe pile is crushed, the crushing cylinder 41 is started, the crushing cylinder 41 can drive the crushing plate 42 to slide, the crushing plate 42 can drive the crushing blocks 43 to slide, since the inner supporting block 21 and the extruding block 34 are all abutted on the crushed pipe wall of the precast pipe pile, the crushing blocks 43 can be directly extruded on the pipe wall of the precast pipe pile after sliding out of the inner supporting block 21 or the extruding block 34, the crushing blocks 43 extrude and crush the crushed pipe wall of the precast pipe pile, so that the crushed pipe wall of the precast pipe pile is easy to be crushed.

[0034] Referring to Figure 4 In order to improve the strength of the crushing cavity 211, two reinforcing rods 44 are penetratingly arranged on the crushing plate 42, the two ends of the reinforcing rods 44 are all fixed to the cavity wall of the crushing cavity 211, the crushing plate 42 is slidingly connected with the reinforcing rods 44, the reinforcing rods 44 are arranged in dislocation with the crushing blocks 43.

[0035] Since the reinforcing rods 44 are arranged in dislocation with the crushing blocks 43, the reinforcing rods 44 can be supported at the position in the crushing cavity 211 where the crushing blocks 43 are not arranged, the reinforcing rods 44 improve the strength of the position in the crushing cavity 211 where the crushing blocks 43 are not arranged, so that the crushing cavity 211 is not easy to be deformed due to extrusion; since the reinforcing rods 44 are slidingly penetratingly arranged on the crushing plate 42, the reinforcing rods 44 can play a sliding guiding role for the crushing plate 42, so that the sliding of the crushing plate 42 is more stable.

[0036] Specifically, referring to Figure 4 The pressure cutting assembly 5 comprises a pressure cutting block 51 and a power part 52.

[0037] Referring to Figure 4 and Figure 5, the pressure cutting block 51 is provided with at least one pressure cutting edge 511; and the power part 52 is arranged on the inner supporting block 21 or the extruding block 34, and is used to drive all the pressure cutting blocks 51 to cut the pipe wall of the precast pipe pile through the pressure cutting edges 511, and the pressure cutting blocks 51 on the inner supporting block 21 are arranged in a staggered manner with the pressure cutting blocks 51 on the extruding block 34.

[0038] In the embodiment, the number of the pressure cutting blocks 51 of each pressure cutting assembly 5 on the inner supporting block 21 is one, and the number of the pressure cutting blocks 51 on each extruding block 34 is two.

[0039] The power part 52 can drive the pressure cutting blocks 51 to act, so that the pressure cutting edges 511 of the pressure cutting blocks 51 can cut the pipe wall of the precast pipe pile, and since the pressure cutting blocks 51 on the inner supporting block 21 are arranged in a staggered manner with the pressure cutting blocks 51 on the extruding block 34, the pressure cutting blocks 51 can sufficiently cut the pipe wall of the precast pipe pile after being broken, so that the pipe wall of the precast pipe pile is easy to separate from the main reinforcement.

[0040] Specifically, referring to Figure 4 and Figure 5 , the pressure cutting block 51 is hinged to the top end of the inner supporting block 21 or the extruding block 34, and the power part 52 includes a push block 521 and a top block 522, both of which are provided with at least one and one-to-one correspondence, and the push block 521 corresponds to the pressure cutting block 51 of the pressure cutting assembly 5 close to itself.

[0041] The push block 521 is located in the power groove 212 opened on the top surface of the inner supporting block 21 or the extruding block 34, the power groove 212 is communicated with the crushing cavity 211, and the push block 521 is fixedly connected to the crushing plate 42; the top block 522 is slidingly arranged in the power groove 212, the sliding direction of the top block 522 is perpendicular to the sliding direction of the crushing plate 42, the top block 522 is provided with a power inclined surface 5221, and the push block 521 abuts against the power inclined surface 5221; when the push block 521 slides with the crushing plate 42, the push block 521 drives the top block 522 to turn the pressure cutting block 51 to the pipe wall of the precast pipe pile through the power inclined surface 5221.

[0042] Referring to Figure 5 , in the embodiment, when the top block 522 slides out of the power groove 212, the side of the top block 522 close to the hinge of the pressure cutting block 51 can be attached to the hinge of the pressure cutting block 51.

[0043] When the crushing plate 42 drives the crushing block 43 to slide, the crushing plate 42 can also drive the push block 521 to move. The push block 521 can push the top block 522 to slide upward with the help of the power inclined plane 5221. The top block 522 can drive the pressure cutting block 51 to rotate, so that the pressure cutting block 51 can turn towards the pipe wall of the precast pipe pile. During the rotation, the pressure cutting block 51 can press and cut the pipe wall of the precast pipe pile after it is crushed through the pressure cutting blade 511, so that the pipe wall and steel wire of the precast pipe pile can be separated from the main steel bar.

[0044] Because the cutting blade 511 of the cutting block 51 applies a downward cutting force to the precast pipe pile wall and steel wire, when the cutting force is transmitted to the main reinforcement through the steel wire, the cutting force can be decomposed into a cutting component perpendicular to the main reinforcement and a cutting component along the main reinforcement. The cutting component along the main reinforcement is unlikely to cause the main reinforcement to bend and deform. Thus, under the condition that the cutting block 51 can normally cut the precast pipe pile wall, the force driving the main reinforcement to bend when the cutting block 51 cuts is reduced, thereby making it easier to keep the main reinforcement of the precast pipe pile intact.

[0045] Because the pipe wall at the bottom of the precast pipe pile head is close to the pile body, in order to protect the pile body from damage during pile head removal, the pipe wall at the bottom of the precast pipe pile head is manually removed.

[0046] Reference Figure 4 and Figure 5 To facilitate automatic reset of the pressure cutting block 51, a torsion spring 523 is provided at the hinge of the pressure cutting block 51. One end of the torsion spring 523 is fixedly connected to the pressure cutting block 51, and the other end is fixedly connected to the inner support block 21 or the pressing block 34. The torsion spring 523 is used to drive the pressure cutting block 51 to rotate away from the pipe wall of the precast pipe pile. During the process of the push block 521 being reset with the crushing plate 42, the top block 522 can slide down and reset under the action of gravity. The elastic force accumulated by the torsion spring 523 can drive the pressure cutting block 51 to rotate in the opposite direction, so that the pressure cutting block 51 can be automatically reset.

[0047] Specifically, refer to Figure 2 The lifting component 22 is a hydraulic multi-stage telescopic cylinder. The lifting component 22 is fixedly connected to the top of the frame 1. The smallest movable end of the lifting component 22 is fixedly connected to the inner support block 21. The hydraulic multi-stage telescopic cylinder has the advantages of small space occupation and large driving force, which enables the lifting component 22 to not only drive the inner support block 21 to move up and down, but also helps to reduce the height of the entire breaking device.

[0048] Specifically, refer to Figure 2 The first lifting part 32 includes a winding shaft 321 and a lifting rope 322.

[0049] Multiple winding shafts 321 and lifting ropes 322 are provided, and they correspond one to one. Multiple winding shafts 321 are arranged around each other and are rotatably connected to the top of the frame 1. One end of the lifting rope 322 is fixed to and wound on the winding shaft 321, and the other end is fixed to the ring support frame 31.

[0050] By rotating the winding shaft 321, the lifting rope 322 can be wound up or unwound. When all the winding shafts 321 unwind the lifting rope 322 simultaneously, the ring support frame 31 can move horizontally and stably downward, which facilitates the driving of the ring support frame 31 to descend.

[0051] Reference Figure 2 To facilitate synchronous rotation of all winding shafts 321, a worm gear 323 is fixedly connected to each winding shaft 321. The worm gear 323 meshes with a worm 324 rotatably connected to the frame 1. The worm 324 is fixedly connected to a first bevel gear 325. All the first bevel gears 325 mesh with a second bevel gear 326. The second bevel gear 326 is connected to a lifting motor 327 mounted on the frame 1. The lifting motor 327 is connected to the frame 1, and its output shaft is fixedly connected to the second bevel gear 326.

[0052] The lifting motor 327 can drive the second bevel gear 326 to rotate, and the second bevel gear 326 can drive all the first bevel gears 325 to rotate synchronously, so that all the worm gears 324 can drive their connected winding shafts 321 to rotate synchronously at the same speed, thereby making it easy for all the lifting ropes 322 to be wound or unwound synchronously.

[0053] Reference Figure 1 and Figure 2 In this embodiment, the winding shaft 321, worm gear 323, worm 324, first bevel gear 325, and second bevel gear 326 are all covered with a dust cover 328 fixed to the frame 1. The dust cover 328 is used to prevent dust or foreign objects from affecting the transmission of the worm gear 323, worm 324, first bevel gear 325, and second bevel gear 326. The lifting motor 327 is fixed to the dust cover 328, and the lifting motor 327 is connected to the frame 1 through the dust cover 328.

[0054] Reference Figure 1 To facilitate the movement of the frame 1, multiple lifting rings 11 are fixedly connected to the frame 1 in a circular arrangement. Through the lifting rings 11, the crane can directly lift the entire demolition device, making it easy to move the demolition device between different precast pipe piles.

[0055] The implementation principle of the pile head breaking device for the prefabricated pipe pile of the wind power foundation is as follows: in use, the lifting piece 22 drives the inner support block 21 to be inserted into the prefabricated pipe pile, the first lifting part 32 drives the ring support frame 31 to move downward to a position opposite to the inner support block 21, the driving cylinder 33 drives the extrusion block 34 to extrude the pipe wall of the prefabricated pipe pile, and the pipe wall of the prefabricated pipe pile is crushed on the side wall of the inner support block 21, the breaking cylinder 41 drives the breaking plate 42 to slide, so that the breaking block 43 is extruded on the crushed pipe wall of the prefabricated pipe pile, the breaking block 43 extrudes and breaks the pipe wall of the prefabricated pipe, then the extrusion block 34 and the breaking block 43 are reset, the inner support block 21 and the ring support frame 31 are both moved downward, the driving cylinder 33 drives the extrusion block 34 to crush the pipe wall of the prefabricated pipe pile again, so that the pipe wall of the prefabricated pipe pile can be crushed layer by layer from top to bottom, the breaking cylinder 41 drives the breaking plate 42 again to make the breaking block 43 extrude and break the pipe wall of the prefabricated pipe pile, and at the same time, the breaking plate 42 can drive the pressing and cutting block 51 to press and cut the pipe wall of the prefabricated pipe above, so that the broken pipe wall of the prefabricated pipe pile can be separated from the main steel bar after being pressed and cut, so that the pile head of the prefabricated pipe pile can be quickly broken through the crushing, breaking and pressing and cutting layer by layer, and since the inner support block 21 can provide support for the main steel bar of the prefabricated pipe pile, the main steel bar of the pile head of the prefabricated pipe pile is not easy to be damaged in the breaking process.

[0056] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A pile head breaking device for precast pipe piles used in wind power foundations, characterized in that, include: Rack (1); The inner support assembly (2) includes an inner support block (21) and a lifting component (22); The inner support block (21) is connected to the frame (1) through the lifting component (22). The lifting component (22) is used to drive the inner support block (21) to move up and down inside the precast pipe pile. The cross section of the inner support block (21) along the axial direction is polygonal. When the inner support block (21) is located inside the precast pipe pile, the side edges of the inner support block (21) are supported one by one at the location of the main steel bars inside the precast pipe pile. The external pressure assembly (3) includes a ring support frame (31), a first lifting part (32), multiple drive cylinders (33) and multiple extrusion blocks (34); The ring support frame (31) is connected to the frame (1) through the first lifting part (32). The first lifting part (32) is used to drive the ring support frame (31) to move up and down. The ring support frame (31) is used to be fitted onto the precast pipe pile. The drive cylinder (33) is connected to the ring support frame (31). The extrusion blocks (34) are connected to the movable end of the drive cylinder (33) in a corresponding manner. The drive cylinder (33) is used to drive the extrusion blocks (34) to crush the precast pipe pile and the part opposite the side wall of the inner support block (21) in a corresponding manner. Each side wall of the inner support block (21) and each extrusion block (34) is provided with a crushing component (4) and a pressing and cutting component (5). The crushing component (4) is used to crush the pipe wall after the precast pipe pile is crushed, and the pressing and cutting component (5) is used to press and cut the pipe wall after the precast pipe pile is crushed.

2. The pile head breaking device for precast pipe piles in wind power foundations according to claim 1, characterized in that: The crushing component (4) is set inside the crushing chamber (211) opened inside the inner support block (21) or the extrusion block (34). The crushing component (4) includes a crushing cylinder (41), a crushing plate (42) and crushing blocks (43). The crushing cylinder (41) is connected to the cavity wall of the crushing chamber (211). The crushing plate (42) is connected to the movable end of the crushing cylinder (41) and is slidably set inside the crushing chamber (211). Multiple crushing blocks (43) are provided and are all connected to the crushing plate (42). The crushing blocks (43) slide out of the inner support block (21) or the extrusion block (34). When the crushing cylinder (41) is in the contracted state, the end face of the crushing block (43) away from the crushing plate (42) is flush with the side of the inner support block (21) or the side of the extrusion block (34).

3. The pile head breaking device for precast pipe piles in wind power foundations according to claim 2, characterized in that: At least one reinforcing rod (44) is provided on the crushing plate (42). Both ends of the reinforcing rod (44) are connected to the cavity wall of the crushing chamber (211). The crushing plate (42) and the reinforcing rod (44) are slidably connected. The reinforcing rod (44) and the crushing block (43) are misaligned.

4. The pile head breaking device for precast pipe piles in wind power foundations according to claim 2, characterized in that: The pressure cutting assembly (5) includes a pressure cutting block (51) and a power unit (52). At least one pressure cutting block (51) is provided. The pressure cutting block (51) is connected to the top of the inner support block (21) or the extrusion block (34). The pressure cutting block (51) is provided with a pressure cutting blade (511). The power unit (52) is provided on the inner support block (21) or the extrusion block (34). The power unit (52) is used to drive all the pressure cutting blocks (51) to press and cut the wall of the precast pipe pile through the pressure cutting blade (511). The pressure cutting blocks (51) on the inner support block (21) and the pressure cutting blocks (51) on the extrusion block (34) are staggered.

5. The pile head breaking device for precast pipe piles in wind power foundations according to claim 4, characterized in that: The cutting block (51) is hinged to the top of the inner support block (21) or the extrusion block (34). The power unit (52) includes a push block (521) and a top block (522). At least one push block (521) and a top block (522) are provided, and they correspond one-to-one. The push block (521) corresponds one-to-one with the cutting block (51) of the cutting assembly (5) that is close to it. The push block (521) is located in the power groove (212) opened on the top surface of the inner support block (21) or the extrusion block (34). 2) The push block (521) is connected to the crushing chamber (211), and the push block (521) is connected to the crushing plate (42). The top block (522) is slidably set in the power groove (212). The top block (522) is provided with a power inclined surface (5221). The push block (521) abuts against the power inclined surface (5221). When the push block (521) slides with the crushing plate (42), the push block (521) drives the top block (522) through the power inclined surface (5221) to make the cutting block (51) turn towards the wall of the precast pipe pile.

6. The pile head breaking device for precast pipe piles in wind power foundations according to claim 5, characterized in that: A torsion spring (523) is provided at the hinge of the cutting block (51), and the torsion spring (523) is used to drive the cutting block (51) to rotate away from the pipe wall of the precast pipe pile.

7. The pile head breaking device for precast pipe piles in wind power foundations according to claim 1, characterized in that: The lifting component (22) is a hydraulic multi-stage telescopic cylinder.

8. The pile head breaking device for precast pipe piles in wind power foundations according to claim 1, characterized in that: The first lifting part (32) includes a winding shaft (321) and a lifting rope (322). Multiple winding shafts (321) and lifting ropes (322) are provided and correspond one to one. Multiple winding shafts (321) are arranged around each other and are rotatably connected to the frame (1). One end of the lifting rope (322) is connected to and wound on the winding shaft (321), and the other end is connected to the ring support frame (31).

9. A pile head breaking device for precast pipe piles in wind power foundations according to claim 8, characterized in that: The winding shaft (321) is connected to a worm gear (323), which meshes with a worm (324) rotatably connected to the frame (1). The worm (324) is connected to a first bevel gear (325), and all the first bevel gears (325) mesh with a second bevel gear (326). The second bevel gear (326) is connected to a lifting motor (327) mounted on the frame (1).

10. A pile head breaking device for precast pipe piles in wind power foundations according to claim 1, characterized in that: The frame (1) is connected to a plurality of lifting rings (11) arranged in a circular pattern.

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