Cast-in-situ bored pile head crushing device

Abstract

The invention relates to a cast-in-situ bored pile head crushing device, and belongs to the technical field of pile foundation construction, the cast-in-situ bored pile head crushing device comprises a plurality of mounting seats, hydraulic cylinders are arranged on the mounting seats, the hydraulic cylinders are connected with drill bits through quick release assemblies, telescopic assemblies are arranged on the two sides of the mounting seats, and the telescopic assemblies on the two sides of the mounting seats are jointly connected with a connecting assembly; the connecting assemblies are used for connecting the adjacent telescopic assemblies so that all the mounting bases and all the telescopic assemblies can be connected to form an annular structure, and driving assemblies used for driving the telescopic assemblies on the two sides of the mounting bases to stretch out and draw back synchronously are arranged on the mounting bases. The pile body crushing device has the effects that adaptive crushing of pile bodies of different specifications is achieved, and the situation that a drill bit interferes with internal steel bars is reduced.

Description

Technical Field

[0001] This application relates to the field of pile foundation construction technology, and in particular to a pile head crushing device for bored cast-in-place piles. Background Technology

[0002] After the construction of bored pile foundations is completed, the pile heads often contain a large amount of mud and the concrete quality is poor. Therefore, they need to be broken up and demolished, while the ring-shaped steel reinforcement cage is retained for recasting concrete columns. Traditionally, when dealing with pile heads, a handheld chisel is used to remove the pile head about 0.5-1.0m above the ground. This process is time-consuming, complex, and may compromise the overall stability of the pile, posing significant safety hazards to the structure.

[0003] To address these issues, existing pile head crushers typically consist of multiple modular crushing modules arranged in a polygonal structure to accommodate piles of varying diameters. Each module is equipped with a hydraulic cylinder that drives a crushing drill bit to break up the pile head concrete.

[0004] However, existing modules mostly use fixed-length connection structures, and the side length of the polygon formed by the modules cannot be adjusted, which limits the breaking position of the drill bit. Due to the significant differences in the arrangement and spacing of the reinforcing bars inside piles of different specifications, the position of the drill bit cannot be adjusted according to the distribution of the reinforcing bars, which can easily lead to interference with the reinforcing bars during the breaking process, resulting in bending or damage to the reinforcing bars. Summary of the Invention

[0005] In order to achieve adaptive crushing of piles of different specifications and reduce interference between the drill bit and the internal reinforcing steel, this application provides a pile head crushing device for bored cast-in-place piles.

[0006] The technical solution for the bored pile head crushing device provided in this application is as follows: A pile head breaking device for bored cast-in-place piles includes several mounting seats. Each mounting seat is equipped with a hydraulic cylinder, which is connected to a drill bit via a quick-release assembly. Telescopic components are located on both sides of each mounting seat, and these components are connected to a connecting assembly. The connecting assembly connects adjacent telescopic components to form a ring structure by linking all mounting seats and all telescopic components together. A drive assembly is provided on each mounting seat to synchronously extend and retract the telescopic components on both sides of the mounting seat.

[0007] By adopting the above technical solution, flexible adaptation to piles of different specifications and their internal steel reinforcement distribution is achieved. Specifically, the telescopic components allow for adjustment of the overall length of each mounting base and telescopic component, thereby changing the side lengths between modules. This enables adjustment of the spacing between adjacent drill bits according to the actual arrangement of the steel reinforcement cage. Furthermore, the quick-release components between the hydraulic cylinder and the drill bit allow for rapid disassembly and assembly of the drill bit, enabling replacement with drill bits of different sizes or shapes, thus improving the adaptability of the device to different steel reinforcement spacing and densities. The telescopic components on both sides of the mounting base can extend and retract synchronously, ensuring that the overall structure maintains a stable geometric shape during adjustment, improving the accuracy and reliability of the crushing operation.

[0008] Optionally, the telescopic assembly includes a fixed arm fixed to one side of the mounting base. A first telescopic arm is fitted inside the fixed arm, a second telescopic arm is fitted inside the first telescopic arm, and a third telescopic arm is fitted inside the second telescopic arm. A fixed rod is mounted on the first telescopic arm, one end of which is fixed to the first telescopic arm, and the other end of which is located inside the second telescopic arm and rotatably connected to a first sprocket. A first chain is wound around the first sprocket, one end of which is fixed to the fixed arm, and the other end of which is fixed to the second telescopic arm. A second sprocket is rotatably connected to the end of the second telescopic arm away from the mounting base, and a second chain is wound around the second sprocket. One end of the second chain is fixed to the third telescopic arm, and the other end of which is fixed to the first telescopic arm. The drive assembly is used to push the fixed rod to move.

[0009] By adopting the above technical solution, the drive component pushes the fixed rod to move, the electric first telescopic arm of the fixed rod extends out of the fixed arm, and at the same time the first sprocket pushes the first chain, so that the first chain drives the second telescopic arm to extend out of the first telescopic arm in a synchronous manner, and the second sprocket pushes against the second chain, so that the second chain drives the third telescopic arm to extend out of the second telescopic arm in a synchronous manner, thereby realizing multi-stage synchronous telescopic extension; The fixed arm, the first telescopic arm, the second telescopic arm, and the third telescopic arm form a linked chain transmission structure, enabling synchronous extension and retraction of multiple telescopic arms. This structure can achieve continuous, stable, and proportional multi-segment extension and retraction adjustments under a single drive, improving overall extension and retraction efficiency and ensuring the accuracy and reliability of synchronous extension and retraction.

[0010] Optionally, a third sprocket is rotatably connected to one end of the first telescopic arm near the mounting base. A third chain is wound around the third sprocket. One end of the third chain is connected to the second telescopic arm, and the other end of the third chain is connected to the fixed arm. Both the third chain and the first chain are connected to the same position of the second telescopic arm.

[0011] By adopting the above technical solution, the second and third chains form a double-sided traction, improving the stability of the first telescopic arm's movement.

[0012] Optionally, the drive assembly includes a first gear rotatably connected within the mounting base and coaxial with the hydraulic cylinder; a second gear rotatably connected within the mounting base, meshing with the first gear and the second gear; a fixed rod connected to a folding rod; a folding rod connected to a rack; two racks arranged opposite to each other and meshing with the first gear; and a motor mounted on the mounting base, connected to the second gear.

[0013] By adopting the above technical solution, the motor drives the second gear to rotate, the second gear drives the first gear to rotate, and the first gear controls the relative movement of the two racks, so that the fixed rods on both sides move relative to each other, thereby realizing the synchronous extension and retraction of the first telescopic arm, the second telescopic arm and the third telescopic arm on both sides of the mounting base.

[0014] Optionally, it also includes a plurality of first ring sleeves, at least one second ring sleeve, at least one third ring sleeve, and at least one fourth ring sleeve. The first ring sleeve is used to be fitted on the fixed arm and fits against the outer wall of the fixed arm. The second ring sleeve is used to be fitted on the first telescopic arm and fits against the outer wall of the first telescopic arm. The third ring sleeve is used to be fitted on the second telescopic arm and fits against the outer wall of the second telescopic arm. The third ring sleeve has a first clearance groove, and the second chain is located in the first clearance groove. The fourth ring sleeve is used to be fitted on the third telescopic arm and fits against the third telescopic arm. The fourth ring sleeve has a second clearance groove, and the second clearance groove is used to accommodate the second chain and the second sprocket. The first ring sleeve, the second ring sleeve, the third ring sleeve, and the fourth ring sleeve are all provided with a connecting rod, the connecting rod is connected to the mounting base, and the connecting rod abuts against the fourth ring sleeve that is furthest from the mounting base.

[0015] By adopting the above technical solution, the first, second, third, and fourth rings respectively installed on the outer side of each telescopic boom can form circumferential covering support for the corresponding telescopic boom, thereby significantly improving the overall rigidity of each telescopic boom in the extended state and reducing bending deformation caused by stress during pile breaking operations. Multiple rings can be flexibly added or removed according to the actual telescopic length, ensuring sufficient support for the telescopic boom at different working lengths.

[0016] Meanwhile, the first and second clearance grooves respectively provided on the third and fourth ring sleeves provide installation space for the second chain and second sprocket, preventing interference between the chain or sprocket and the ring sleeve during extension and retraction, and ensuring smooth operation of the chain drive mechanism. Multiple ring sleeves are connected to the mounting base via a connecting rod, allowing for quick and complete fixing of each ring sleeve after installation, improving installation efficiency and facilitating on-site assembly and maintenance.

[0017] Optionally, the connecting assembly includes a first connecting seat and a second connecting seat. The first connecting seat is connected to the third telescopic arm on one side of the mounting seat, and the second connecting seat is connected to the third telescopic arm on the other side of the mounting seat. A sleeve is provided inside the second connecting seat, and the second connecting seat can be inserted into the first connecting seat. A first connecting hole is provided on the first connecting seat. The first connecting seat of one mounting seat is connected to the second connecting seat of another mounting seat through a first pin. The first pin passes through the sleeve and the first connecting hole.

[0018] By adopting the above technical solution, during installation, it is only necessary to insert the second connecting seat on one mounting base into the first connecting seat of the adjacent mounting base, aligning the sleeve inside the second connecting seat with the first connecting hole on the first connecting seat, and then inserting the first pin through it, thus completing the quick connection of the two mounting bases. Because the pin passes through the sleeve and the first connecting hole to form a rotating pair structure, the two adjacent mounting bases can rotate relative to each other around the first pin as a pivot, thereby enabling the overall ring structure to have angle adjustment capability during assembly, facilitating the formation of a stable polygonal structure according to different pile diameters.

[0019] Optionally, the first connecting seat has a plurality of second connecting holes, and the second connecting seat has a plurality of third connecting holes. The plurality of second connecting holes are equidistantly arranged around the central axis of the first connecting holes, and the plurality of third connecting holes are equidistantly arranged around the central axis of the sleeve. When the first connecting seat of one mounting seat is connected to the second connecting seat of another mounting seat through the first pin, at least one set of first connecting holes corresponds to one set of second connecting holes, and the corresponding first connecting holes and second connecting holes are jointly provided with a second pin.

[0020] By adopting the above technical solution, the arrangement of multiple sets of second and third connecting holes ensures that after multiple mounting bases are assembled, at least one set of second connecting holes can be precisely aligned with one set of third connecting holes, allowing the insertion of the second pin and achieving reliable fixation between the mounting bases. This design not only improves the connection strength and stability between adjacent mounting bases but also ensures that the annular structure maintains overall rigidity when subjected to lateral forces or impacts generated during breakage.

[0021] Optionally, the quick-release assembly includes a fixed socket and a plug-in post. The fixed socket is fixedly connected to the piston rod of the hydraulic cylinder. A spring is fitted on the fixed socket, with one end of the spring fixed to the fixed socket and the other end of the spring connected to an adjusting sleeve. The adjusting sleeve is fitted onto the fixed socket. The fixed socket has a plug-in groove and several guide holes along its circumference, which communicate with the plug-in groove. An annular guide groove is formed at the end of the adjusting sleeve away from the hydraulic cylinder, and a guide ball is placed in the guide hole. One end of the plug-in post is inserted into the plug-in groove, and an annular retaining groove is formed on the circumference of the plug-in post. The plug-in post is connected to the drill bit.

[0022] By adopting the above technical solution, when changing the drill bit, it is only necessary to push the adjusting sleeve towards the mounting base. At this time, the spring is in a compressed state, the annular guide groove is connected to the guide hole, and then the plug pin is pulled out. During the process of pulling out the plug pin, the plug groove pushes the guide ball into the annular guide groove, and the guide ball separates from the annular retaining groove. The plug pin is smoothly pulled out from the fixed socket. Then, while keeping the position of the adjusting sleeve, the plug pin of the new drill bit is directly inserted into the plug groove. After it is inserted into place, the adjusting sleeve is released, the spring pushes the adjusting sleeve to reset, and after the annular guide groove pushes the retaining ball into the annular retaining groove, the annular guide groove is misaligned with the guide hole, thus completing the drill bit replacement.

[0023] Optionally, the mounting base is provided with a dust removal hood, the dust removal hood is connected to an exhaust pipe, the exhaust pipe is connected to a dust collection box, an exhaust port is opened on one side of the dust collection box, a fan is installed in the exhaust port, and a filter is installed in the exhaust port.

[0024] By adopting the above technical solution, the dust collector hood on the mounting base can effectively capture the dust generated during the crushing process, and the exhaust pipe guides the dust into the dust collection box for centralized collection. The exhaust port of the dust collection box is equipped with a fan and filter, so that the air is filtered before being discharged, thereby reducing dust emissions to the construction site and effectively improving the working environment.

[0025] Optionally, the extraction pipe passes through the mounting base, one end of the dust collector is threaded onto the extraction pipe, and the other end of the extraction pipe is threaded onto the dust collection box.

[0026] By adopting the above technical solution, the dust collector hood, exhaust pipe, and dust collection box are connected by threads, allowing for quick assembly and disassembly of each component. During on-site construction, the assembly or disassembly of the dust collector hood, exhaust pipe, and dust collection box can be completed without complicated tools, improving installation and maintenance efficiency.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The telescopic assembly allows for adjustment of the overall length of each mounting base and the telescopic assembly itself, thereby changing the side lengths between modules. This enables the spacing between adjacent drill bits to be adjusted according to the actual arrangement of the reinforcing steel cage. Furthermore, the quick-release assembly between the hydraulic cylinder and the drill bit allows for rapid assembly and disassembly of the drill bit, facilitating the replacement of drill bits of different sizes or shapes. This enhances the adaptability of the device to different reinforcing steel spacings and densities. The telescopic assemblies on both sides of the mounting base can extend and retract synchronously, ensuring that the overall structure maintains a stable geometric shape during adjustment, thus improving the accuracy and reliability of the crushing operation. 2. A chain-driven transmission structure is formed between the fixed arm, the first telescopic arm, the second telescopic arm, and the third telescopic arm, enabling synchronous extension and retraction of multiple telescopic arms. This structure can achieve continuous, stable, and proportional multi-segment extension and retraction adjustments under a single drive, improving overall extension and retraction efficiency and ensuring the accuracy and reliability of synchronous extension and retraction. 3. The dust hood on the mounting base can effectively capture the dust generated during the crushing process, and the exhaust pipe guides the dust into the dust collection box for centralized collection. The exhaust port of the dust collection box is equipped with a fan and filter, so that the air is filtered before being discharged, thereby reducing dust emissions to the construction site and effectively improving the working environment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0029] Figure 2 This is a schematic diagram illustrating the structure of the exhaust pipe, dust hood, and dust collection box in an embodiment of this application.

[0030] Figure 3 This is a schematic diagram illustrating the structure of the driving component in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram illustrating the structure of the telescopic component in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram illustrating the structure of the first ring, the second ring, the third ring, and the fourth ring in the embodiments of this application.

[0033] Figure 6 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0034] Figure 7 This is a schematic diagram illustrating the structure of the third connecting hole and the sleeve in an embodiment of this application.

[0035] Figure 8 This is a schematic diagram illustrating the structure of the quick-release assembly in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Mounting base; 11. First mounting channel; 12. Hydraulic cylinder; 13. Drill bit; 14. Second mounting channel; 2. Telescopic assembly; 21. Fixed arm; 22. First telescopic arm; 23. Second telescopic arm; 24. Third telescopic arm; 25. Fixed rod; 26. First sprocket; 27. First chain; 28. Second sprocket; 29. ​​Second chain; 210. Third sprocket; 211. Third chain; 3. Connecting assembly; 31. First connecting seat; 311. First connecting hole; 312. Second connecting hole; 32. Second connecting seat; 321. Third connecting hole; 33. Sleeve; 34. First pin; 35. 4. Drive assembly; 41. First gear; 42. Second gear; 43. Motor; 44. Folding rod; 45. Rack; 51. Exhaust pipe; 52. Dust hood; 53. Dust collection box; 54. Filter; 55. Fan; 61. First ring sleeve; 62. Second ring sleeve; 63. Third ring sleeve; 631. First clearance groove; 64. Fourth ring sleeve; 641. Second clearance groove; 65. Connecting rod; 7. Quick release assembly; 71. Fixed socket; 711. Insertion groove; 712. Guide hole; 72. Insertion post; 721. Annular slot; 73. Spring; 74. Adjusting sleeve; 741. Annular guide groove; 75. Guide ball. Detailed Implementation

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

[0038] This application discloses a device for crushing the head of a bored cast-in-place pile.

[0039] like Figure 1 , Figure 2 and Figure 3 The bored pile head breaking device includes several mounting seats 1, each with a rectangular structure. A first mounting channel 11 is located at the center of each mounting seat 1, extending along its width. A hydraulic cylinder 12 is fixedly mounted on each mounting seat 1 via the first mounting channel 11. A drill bit 13 is connected to the hydraulic cylinder 12 via a quick-release assembly 7. Telescopic components 2 are mounted on both sides of each mounting seat 1. These telescopic components 2 are connected to a connecting assembly 3, which connects adjacent telescopic components 2. Specifically, it connects two adjacent mounting seats 1 with their opposite telescopic components 2, forming a polygonal ring structure with all mounting seats 1 and all telescopic components 2 connected together. Each mounting seat 1 is equipped with a drive assembly 4 for synchronously extending and retracting its two telescopic components 2.

[0040] The mounting base 1 also has a second mounting channel 14, which is located to one side of the first mounting channel 11 and is perpendicular to the first mounting channel 11. An exhaust pipe 51 passes through the second mounting channel 14, and a dust collector hood 52 is threadedly connected to the top end of the exhaust pipe 51. A dust collection box 53 is threadedly connected to the bottom end of the exhaust pipe 51. Both the dust collection box 53 and the dust collector hood 52 are connected to the exhaust pipe 51, and when tightened, they together press against the mounting base 1. A filter 54 is installed on the side of the dust collection box 53 away from the drill bit 13, and a fan 55 is also installed on the dust collection box 53, with the filter 54 facing the air inlet of the fan 55. The fan 55 is an internal rotor fan, with its housing fixed inside the exhaust port of the dust collection box 53, and an external power connector is located on the dust collection box 53. Filter 54 can be a screen filter / bag filter / cartridge filter.

[0041] The telescopic assembly 2 allows for adjustment of the overall length of each mounting base 1 and the telescopic assembly 2, thereby changing the side lengths between modules. This enables the spacing between adjacent drill bits 13 to be adjusted according to the actual arrangement of the reinforcing steel cage. Furthermore, the quick-release assembly 7 between the hydraulic cylinder 12 and the drill bit 13 allows for rapid disassembly and assembly of the drill bit 13, enabling the replacement of drill bits 13 with different sizes or shapes. This enhances the adaptability of the device to different reinforcing steel spacing and densities. The telescopic assemblies 2 on both sides of the mounting base 1 can extend and retract synchronously, ensuring that the overall structure maintains a stable geometric shape during adjustment, thus improving the accuracy and reliability of the crushing operation.

[0042] The dust hood 52 on the mounting base 1 can effectively capture the dust generated during the crushing process, and the exhaust pipe 51 guides the dust into the dust collection box 53 for centralized collection. The exhaust port of the dust collection box 53 is equipped with a fan 55 and a filter 54, so that the air is filtered before being discharged, thereby reducing the dust emission to the construction site and effectively improving the working environment.

[0043] like Figure 4The telescopic assembly 2 includes a fixed arm 21, which is sleeve-shaped and mounted on one side of the mounting base 1. A first telescopic arm 22 is sleeved inside the fixed arm 21, a second telescopic arm 23 is sleeved inside the first telescopic arm 22, and a third telescopic arm 24 is sleeved inside the second telescopic arm 23. Both the first and second telescopic arms 22 and 23 are tubular structures, while the third telescopic arm 24 is a sleeve-shaped structure. A fixed rod 25 is fixed inside the first telescopic arm 22. One end of the fixed rod 25 extends into the second telescopic arm 23, and this end is rotatably connected to a first sprocket 26. A first chain 27 is wound around the first sprocket 26. One end of the first chain 27 is fixed to the inner side of the second telescopic arm 23 near the mounting base 1, and the other end of the first chain 27 is fixed to the inner side of the fixed arm 21 near the mounting base 1. By driving the fixed rod 25 through the drive assembly 4, the first telescopic arm 22 and the second telescopic arm 23 can be synchronously extended and retracted.

[0044] The end of the second telescopic arm 23 away from the mounting base 1 is rotatably connected to a second sprocket 28. A second chain 29 is wound around the second sprocket 28. One end of the second chain 29 is fixed to the end of the third telescopic arm 24 near the mounting base 1, and the other end of the second chain 29 is fixed to the end of the first telescopic arm 22 near the mounting base 1, so that the first telescopic arm 22, the second telescopic arm 23 and the third telescopic arm 24 extend and retract synchronously.

[0045] A third sprocket 210 is rotatably connected to the end of the first telescopic arm 22 near the mounting base 1. A third chain 211 is wound around the third sprocket 210. One end of the third chain 211 is fixed to the end of the fixed arm 21 away from the mounting base 1, and the other end of the third chain 211 is fixed to the end of the second telescopic arm 23 near the mounting base 1. Both the first chain 27 and the third chain 211 are fixed at the same position on the second telescopic arm 23. The second chain 27 and the third chain 211 form a double-sided traction, improving the stability of the movement of the first telescopic arm 22.

[0046] like Figure 1 and Figure 3The mounting base 1 has a hollow structure. The drive assembly 4 includes a first gear 41, which is rotatably connected inside the mounting base 1 and coaxially arranged with the first mounting channel 11. A second gear 42 is also rotatably connected inside the mounting base 1. The size of the second gear 42 is smaller than that of the first gear 41. The first gear 41 and the second gear 42 mesh. A motor 43 is located on the side of the mounting base 1 away from the drill bit 13, and the motor 43 is connected to the second gear 42. A fixed rod 25 is connected to a folding rod 44, which extends into the mounting base 1. A rack 45 is connected to the end of the folding rod 44 away from the fixed rod 25. The rack 45 meshes with the first gear 41, and the two racks 45 are arranged opposite each other. The motor 43 drives the second gear 42 to rotate, and the second gear 42 drives the first gear 41 to rotate. The first gear 41 controls the relative movement of the two racks 45, so that the fixed rods 25 on both sides move relative to each other, realizing the synchronous extension and retraction of the first telescopic arm 22, the second telescopic arm 23, and the third telescopic arm 24 on both sides of the mounting base 1.

[0047] like Figure 1 and Figure 5 A plurality of first rings 61 are fitted on the fixed arm 21. At least one second ring 62 is fitted on the first telescopic arm 22. In this embodiment, there is one second ring 62. The outer diameter of the second ring 62 is the same as the outer diameter of the first ring 61. The inner wall of the second ring 62 is fitted to the outer wall of the first telescopic arm 22, such that the second ring 62 closest to the fixed arm 21 abuts against the end of the fixed arm 21 and the first ring 61. At least one third ring 63 is fitted on the second telescopic arm 23. In this embodiment, there is one third ring 63. The outer diameter of the third ring 63 is the same as the outer diameter of the second ring 62. The inner wall of the third ring 63 is fitted to the outer wall of the second telescopic arm 23. The third ring 63 closest to the first telescopic arm 22 abuts against the end of the first telescopic arm 22 and the second ring 62. Furthermore, the inner wall of each third ring 63 is provided with a first clearance groove 631 for accommodating the second chain 29. At least one fourth ring sleeve 64 is fitted on the third telescopic arm 24. In this embodiment, there is one fourth ring sleeve 64. The outer diameter of the fourth ring sleeve 64 is the same as the outer diameter of the third ring sleeve 63. The inner wall of the fourth ring sleeve 64 fits against the outer wall of the third telescopic arm 24. The fourth ring sleeve 64 closest to the second telescopic arm 23 abuts against the end of the second telescopic arm 23 and the third ring sleeve 63. The inner wall of each fourth ring sleeve 64 is provided with a second clearance groove 641, which is used to accommodate the second chain 29 and the second sprocket 28.

[0048] The first ring sleeve 61, the second ring sleeve 62, the third ring sleeve 63, and the fourth ring sleeve 64 are all provided with a connecting rod 65. The connecting rod 65 is threadedly connected to the mounting base 1, and the connecting rod 65 abuts against the fourth ring sleeve 64, which is furthest from the mounting base 1.

[0049] Before connecting multiple mounting bases 1, the extension amounts of the first telescopic arm 22, the second telescopic arm 23, and the third telescopic arm 24 are pre-adjusted. Then, based on the actual extension amounts of the first telescopic arm 22, the second telescopic arm 23, and the third telescopic arm 24, the corresponding number of second rings 62, third rings 63, and fourth rings 64 are selected. The first rings 61, the second rings 62, the third rings 63, and the fourth rings 64 can form circumferential covering support for the corresponding telescopic arms, thereby significantly improving the overall rigidity of each level of telescopic arm in the extended state and reducing bending deformation caused by stress during pile breaking operations.

[0050] like Figure 6 and Figure 7 The connecting assembly 3 includes a first connecting seat 31 and a second connecting seat 32. The first connecting seat 31 is fixedly installed on the end of the third telescopic arm 24 on one side of the mounting base 1, and the second connecting seat 32 is fixedly installed on the end of the third telescopic arm 24 on the other side of the mounting base 1. Both the first connecting seat 31 and the second connecting seat 32 are C-shaped sheet metal parts, and the groove width of the first connecting seat 31 is greater than the groove width of the second connecting seat 32, so that the second connecting seat 32 of one third telescopic arm 24 can be inserted into the first connecting seat 31 of an adjacent third telescopic arm 24. The first connecting seat 31 has a first connecting hole 311 at both its top and bottom, and a sleeve 33 is provided inside the second connecting seat 32. After the second connecting seat 32 is inserted into the first connecting seat 31, the sleeve 33 and the first connecting hole 311 are connected together by a first pin 34, so that the first connecting seat 31 and the second connecting seat 32 form a rotatable connection.

[0051] The first connecting seat 31 has several sets of second connecting holes 312. The sets of second connecting holes 312 are arranged equidistantly around the central axis of the first connecting hole 311. Each set of second connecting holes 312 has four holes. In the same set, two second connecting holes 312 are opened on the top surface of the first connecting seat 31 and are arranged radially along the first connecting hole 311. The other two second connecting holes 312 are opened on the bottom surface of the first connecting seat 31 and are also arranged radially along the first connecting hole 311. The second connecting holes 312 on the top surface and the bottom surface of the first connecting seat 31 correspond one-to-one.

[0052] The second connecting seat 32 has several sets of third connecting holes 321, which are equidistantly arranged around the central axis of the sleeve 33. Each set of third connecting holes 321 has four holes. In the same set, two second connecting holes 312 are located on the top surface of the first connecting seat 31 and are arranged radially along the first connecting hole 311. The other two second connecting holes 312 are located on the bottom surface of the first connecting seat 31 and are also arranged radially along the first connecting hole 311. The second connecting holes 312 on the top and bottom surfaces of the first connecting seat 31 correspond one-to-one. The first connecting seat 31 of one mounting seat 1 is connected to the second connecting seat 32 of another mounting seat 1 through a first pin 34. When the first connecting seat 31 and the second connecting seat 32 rotate to the required angle, at least one set of first connecting holes 311 corresponds to one set of second connecting holes 312. The corresponding first connecting holes 311 and second connecting holes 312 are connected by a second pin 35.

[0053] The arrangement of multiple sets of second connecting holes 312 and multiple sets of third connecting holes 321 ensures that after the multiple mounting bases 1 are assembled, at least one set of second connecting holes 312 can be precisely aligned with one set of third connecting holes 321, allowing the insertion of the second pin 35 and achieving reliable fixation between the mounting bases 1. This design not only improves the connection strength and stability between adjacent mounting bases 1 but also ensures that the annular structure maintains overall rigidity when subjected to lateral forces or impacts generated during breakage.

[0054] like Figure 8 The quick-release assembly 7 includes a fixed socket 71 and a plug-in post 72. The fixed socket 71 is fixedly connected to the piston rod of the hydraulic cylinder 12. A spring 73 is sleeved on the outer periphery of the fixed socket 71. One end of the spring 73 is fixed to the fixed socket 71, and the other end of the spring 73 is connected to an adjusting sleeve 74. The adjusting sleeve 74 is sleeved on the fixed socket 71 and the spring 73. A plug-in groove 711 is opened at the end of the fixed socket 71 away from the hydraulic cylinder 12. The fixed socket 71 has several guide holes 712 along its circumference, which are connected to the insertion groove 711. The adjusting sleeve 74 has an annular guide groove 741 at the end away from the hydraulic cylinder 12. The annular guide groove 741 extends to the inner wall of the adjusting sleeve 74 and the end away from the hydraulic cylinder 12. A guide ball 75 is provided in the guide hole 712. One end of the insertion post 72 is inserted into the insertion groove 711. An annular retaining groove 721 is provided on the circumference of the insertion post 72. The insertion post 72 is connected to the drill bit 13.

[0055] When replacing drill bit 13, simply push the adjusting sleeve 74 towards the mounting base 1. At this time, the spring 73 is compressed, and the annular guide groove 741 is connected to the guide hole 712. Then, pull out the plug pin 72. During the process of pulling out the plug pin 72, the plug groove 711 pushes the guide ball 75 to extend into the annular guide groove 741, and the guide ball 75 separates from the annular retaining groove 721. The plug pin 72 is then smoothly pulled out from the fixed socket 71. Then, keeping the position of the adjusting sleeve 74, insert the plug pin 72 of the new drill bit 13 directly into the plug groove 711. After it is inserted into place, release the adjusting sleeve 74. The spring 73 pushes the adjusting sleeve 74 to reset. After the annular guide groove 741 pushes the retaining ball into the annular retaining groove 721, the annular guide groove 741 is misaligned with the guide hole 712, thus completing the replacement of drill bit 13.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pile head crushing device for bored cast-in-place piles, characterized in that: The device includes several mounting bases (1), each mounting base (1) is equipped with a hydraulic cylinder (12), the hydraulic cylinder (12) is connected to a drill bit (13) via a quick-release assembly (7), and telescopic assemblies (2) are provided on both sides of the mounting base (1). The telescopic assemblies (2) on both sides of the mounting base (1) are connected to a connecting assembly (3). The connecting assembly (3) is used to connect adjacent telescopic assemblies (2) so that all the mounting bases (1) and all the telescopic assemblies (2) are connected to form a ring structure. The mounting base (1) is equipped with a drive assembly (4) for driving the telescopic assemblies (2) on both sides of the mounting base (1) to extend and retract synchronously.

2. The pile head crushing device for bored piles according to claim 1, characterized in that: The telescopic assembly (2) includes a fixed arm (21) fixed to one side of the mounting base (1). A first telescopic arm (22) is fitted inside the fixed arm (21), a second telescopic arm (23) is fitted inside the first telescopic arm (22), and a third telescopic arm (24) is fitted inside the second telescopic arm (23). A fixed rod (25) is mounted on the first telescopic arm (22). One end of the fixed rod (25) is fixed to the first telescopic arm (22), and the other end of the fixed rod (25) is located inside the second telescopic arm (23) and rotatably connected to a first sprocket (26). A first chain (27) is wound around the wheel (26). One end of the first chain (27) is fixed to the fixed arm (21), and the other end of the first chain (27) is fixed to the second telescopic arm (23). The end of the second telescopic arm (23) away from the mounting base (1) is rotatably connected to a second sprocket (28). The second sprocket (28) is wound with a second chain (29). One end of the second chain (29) is fixed to the third telescopic arm (24), and the other end of the second chain (29) is fixed to the first telescopic arm (22). The drive assembly (4) is used to push the fixed rod (25) to move.

3. The pile head crushing device for bored piles according to claim 2, characterized in that: The first telescopic arm (22) is rotatably connected to a third sprocket (210) near the mounting base (1). The third sprocket (210) is wound with a third chain (211). One end of the third chain (211) is connected to the second telescopic arm (23), and the other end of the third chain (211) is connected to the fixed arm (21). The third chain (211) and the first chain (27) are both connected to the second telescopic arm (23) at the same position.

4. The pile head crushing device for bored cast-in-place piles according to claim 2, characterized in that: The drive assembly (4) includes a first gear (41) which is rotatably connected to the mounting base (1) and is coaxial with the hydraulic cylinder (12). A second gear (42) is rotatably connected to the mounting base (1), and the first gear (41) meshes with the second gear (42). A fixed rod (25) is connected to a folding rod (44), and the folding rod (44) is connected to a rack (45). The two racks (45) are arranged opposite to each other and mesh with the first gear (41). A motor (43) is provided on the mounting base (1), and the motor (43) is connected to the second gear (42).

5. The pile head crushing device for bored cast-in-place piles according to claim 2, characterized in that: It also includes several first ring sleeves (61), at least one second ring sleeve (62), at least one third ring sleeve (63), and at least one fourth ring sleeve (64). The first ring sleeve (61) is used to fit on the fixed arm (21), and the first ring sleeve (61) fits against the outer wall of the fixed arm (21). The second ring sleeve (62) is used to fit on the first telescopic arm (22), and the second ring sleeve (62) fits against the outer wall of the first telescopic arm (22). The third ring sleeve (63) is used to fit on the second telescopic arm (23). The third ring sleeve (63) is fitted to the outer wall of the second telescopic arm (23). The third ring sleeve (63) has a first clearance groove (631). The second chain (29) is located in the first clearance groove (631). The fourth ring sleeve (64) is used to be fitted on the third telescopic arm (24). The fourth ring sleeve (64) is fitted to the third telescopic arm (24). The fourth ring sleeve (64) has a second clearance groove (641). The second clearance groove (641) is used to accommodate the second chain (29) and the second sprocket (28). The first ring sleeve (61), the second ring sleeve (62), the third ring sleeve (63) and the fourth ring sleeve (64) are all provided with a connecting rod (65), the connecting rod (65) is connected to the mounting base (1), and the connecting rod (65) abuts against the fourth ring sleeve (64) which is furthest from the mounting base (1).

6. The pile head crushing device for bored cast-in-place piles according to claim 2, characterized in that: The connecting assembly (3) includes a first connecting seat (31) and a second connecting seat (32). The first connecting seat (31) is connected to the third telescopic arm (24) on one side of the mounting base (1), and the second connecting seat (32) is connected to the third telescopic arm (24) on the other side of the mounting base (1). A sleeve (33) is provided inside the second connecting seat (32), and the second connecting seat (32) can be inserted into the first connecting seat (31). A first connecting hole (311) is provided on the first connecting seat (31). The first connecting seat (31) of one mounting base (1) is connected to the second connecting seat (32) of another mounting base (1) through a first pin (34). The first pin (34) passes through the sleeve (33) and the first connecting hole (311).

7. The pile head crushing device for bored cast-in-place piles according to claim 6, characterized in that: The first connecting seat (31) has a plurality of second connecting holes (312), and the second connecting seat (32) has a plurality of third connecting holes (321). The plurality of second connecting holes (312) are equidistantly arranged around the central axis of the first connecting hole (311), and the plurality of third connecting holes (321) are equidistantly arranged around the central axis of the sleeve (33). When the first connecting seat (31) of one mounting seat (1) is connected to the second connecting seat (32) of another mounting seat (1) through the first pin (34), at least one set of first connecting holes (311) corresponds to one set of second connecting holes (312), and the corresponding first connecting holes (311) and second connecting holes (312) are jointly provided with a second pin (35).

8. The pile head crushing device for bored cast-in-place piles according to claim 1, characterized in that: The quick-release assembly (7) includes a fixed socket (71) and a plug-in post (72). The fixed socket (71) is fixedly connected to the piston rod of the hydraulic cylinder (12). A spring (73) is sleeved on the fixed socket (71). One end of the spring (73) is fixed to the fixed socket (71), and the other end of the spring (73) is connected to an adjusting sleeve (74). The adjusting sleeve (74) is sleeved on the fixed socket (71). The fixed socket (71) has a plug-in groove (711). (71) A plurality of guide holes (712) are provided along its circumference. The guide holes (712) are connected to the insertion groove (711). An annular guide groove (741) is provided at one end of the adjusting sleeve (74) away from the hydraulic cylinder (12). A guide ball (75) is provided in the guide hole (712). One end of the insertion post (72) is inserted into the insertion groove (711). An annular slot (721) is provided on the circumference of the insertion post (72). The insertion post (72) is connected to the drill bit (13).

9. The pile head crushing device for bored cast-in-place piles according to claim 1, characterized in that: The mounting base (1) is provided with a dust removal hood (52), the dust removal hood (52) is connected to an exhaust pipe (51), the exhaust pipe (51) is connected to a dust collection box (53), the dust collection box (53) is equipped with a fan (55), and the dust collection box (53) is equipped with a filter (54).

10. The pile head crushing device for bored piles according to claim 9, characterized in that: The exhaust pipe (51) passes through the mounting base (1), one end of the dust collector (52) is threaded to the exhaust pipe (51), and the other end of the exhaust pipe (51) is threaded to the dust collection box (53).

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