Modular pile head ring cutting apparatus with adaptive alignment

Abstract

The application discloses a self-adaptive alignment modular pile head ring cutting equipment and relates to the technical field of pile head ring cutting in building construction. The technical scheme is as follows: the installation frame is provided with lifting mechanisms symmetrically arranged on both sides, the bottom of each lifting mechanism is detachably connected with a propelling mechanism, and the propelling mechanisms on both sides are detachably connected with a flexible ring cutting mechanism and a flexible balancing mechanism; the bottom of the installation frame is provided with a trumpet mouth plate, the trumpet mouth plate is used for clamping the pile head, and the diameter of the lower part of the trumpet mouth plate is greater than that of the upper part of the trumpet mouth plate. The self-adaptive alignment modular pile head ring cutting equipment can automatically adapt to the alignment function through the design of the trumpet mouth plate, can greatly shorten the preparation time and improve the work efficiency, can be quickly disassembled and assembled, is convenient to transport, can be replaced with different installation frames, and can meet the pile head ring cutting of piles with different diameters.

Description

Technical Field

[0001] This invention relates to the field of pile head circumferential cutting technology in building construction, and more specifically, to a modular pile head circumferential cutting device with adaptive alignment. Background Technology

[0002] As the connection between the pile foundation and the upper pile cap, the pile head must ensure that the load is effectively transferred to the foundation. To ensure the stability of the overall structure, the pile head must be reserved and then removed.

[0003] Currently, construction documents explicitly require that the pile heads of cast-in-place piles must not be directly chiseled away; instead, the "circumferential cutting method" or "pre-cutting method + mechanical chiseling method" must be used. The circumferential cutting method involves cutting the pile head circumferentially with a toothed saw followed by mechanical chiseling, replacing the traditional method of direct demolition using a pneumatic hammer, effectively avoiding damage to the pile head reinforcement and issues with the flatness of the pile cap.

[0004] Developing specialized circumferential cutting equipment ensures construction complies with policy requirements and avoids compliance risks due to outdated processes. Traditional manual chiseling easily damages the main reinforcement and concrete structure of the pile, while circumferential cutting equipment, through precise control of the cutting depth, effectively avoids damage to the remaining pile body, protecting its integrity. The equipment can quickly complete circumferential cutting of the pile head, achieving elevation control, reducing manual measurement errors, and improving construction efficiency and accuracy. The equipment is reusable with low material consumption, resulting in significant long-term cost advantages. It fulfills the goal of "replacing manpower with equipment," reducing the labor intensity of operators and improving their health. Therefore, this invention proposes an adaptive alignment modular pile head circumferential cutting device. Summary of the Invention

[0005] The purpose of this invention is to provide a modular pile head circumferential cutting device with adaptive alignment, which can greatly shorten preparation time and improve work efficiency by adjusting the alignment function.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] The first aspect of the present invention provides a modular pile head circumferential cutting device with adaptive alignment, including a mounting frame, wherein lifting mechanisms are symmetrically arranged on both sides of the mounting frame, a propulsion mechanism is detachably connected to the bottom of the lifting mechanism, and a flexible circumferential cutting mechanism and a flexible balancing mechanism are detachably connected to the propulsion mechanisms on both sides.

[0008] The mounting frame has a flared plate at the bottom, which is used to hold the pile head in place. The lower diameter of the flared plate is larger than the upper diameter of the flared plate.

[0009] In conjunction with the first aspect, the present invention is further configured such that: the mounting bracket includes a slewing bearing, the inner ring of the slewing bearing is detachably connected to a lifting plate, the middle of the lifting plate is threadedly connected to a first lead screw, the bottom of the inner ring of the slewing bearing is detachably connected to a flared plate, the outer ring of the slewing bearing is symmetrically and detachably connected to mounting plates, and the mounting plates are connected to a lifting mechanism.

[0010] In conjunction with the first aspect, the present invention is further configured such that: the lifting frame plate is also threadedly connected to a plurality of second lead screws, the second lead screws being arranged around the first lead screw.

[0011] In conjunction with the first aspect, the present invention is further configured such that the bottom of the first lead screw and the bottom of the second lead screw are both detachably connected to a base.

[0012] In conjunction with the first aspect, the present invention is further configured such that the base is a spherical base.

[0013] In conjunction with the first aspect, the present invention is further configured such that: the lifting mechanism includes a third lead screw and a guide rod, the third lead screw is threadedly connected to the mounting plate, the guide rod is slidably connected to the mounting plate, and the bottom of the lead screw and the guide rod is detachably connected to the propulsion mechanism.

[0014] In conjunction with the first aspect, the present invention is further configured such that: the propulsion mechanism includes a housing and a fourth lead screw, the top of the housing is detachably connected to the lead screw and the guide rod, the middle of the housing is threadedly connected to the fourth lead screw, and the end of the fourth lead screw is detachably connected to a flexible circumferential cutting mechanism or a flexible balancing mechanism.

[0015] In conjunction with the first aspect, the present invention is further configured such that: the flexible ring-cutting mechanism includes a flexible component and a ring-cutting component, the fourth lead screw is detachably connected to the flexible component, and the flexible component is fixedly connected to the ring-cutting component.

[0016] In conjunction with the first aspect, the present invention is further configured such that: the flexible balancing mechanism includes a flexible component and a balancing component, the fourth lead screw is detachably connected to the flexible component, and the flexible component is fixedly connected to the balancing component.

[0017] In conjunction with the first aspect, the present invention is further configured such that: the flexible component includes a first connecting plate, a second connecting plate, and a guide post; the fourth lead screw passes through the first connecting plate and the second connecting plate in sequence, and the end of the fourth lead screw is fixed with a nut; the diameter of the fourth lead screw decreases at the contact point with the first connecting plate until the end, so that the fourth lead screw abuts against the first connecting plate; the hole opened in the first connecting plate is adapted to the decreasing diameter of the fourth lead screw; and a spring is sleeved on the outer surface of the fourth lead screw between the first connecting plate and the second connecting plate; the guide post passes through the first connecting plate and the second connecting plate in sequence, and both ends of the guide post are fixed with nuts; and a spring is sleeved on the outer surface of the first cylinder located between the first connecting plate and the second connecting plate.

[0018] In conjunction with the first aspect, the present invention is further configured such that: the circumferential cutting assembly includes a circumferential cutting frame, the circumferential cutting frame is detachably connected to a motor, the output end of the motor is connected to a drive gear, the drive gear is meshed with an intermediate gear, the intermediate gear is rotatably connected to the circumferential cutting frame, and the gear post of the intermediate gear is detachably connected to a saw blade.

[0019] In conjunction with the first aspect, the present invention is further configured such that: the balancing component includes a balancing frame, the side of the balancing frame near the flexible circumferential cutting mechanism is provided with an arc-shaped notch, the radius of the arc-shaped notch is the same as that of the pile head, and the balancing frame is equipped with a plurality of rollers along the arc-shaped notch.

[0020] A second aspect of the present invention also provides a method of using a pile head circumferential cutting device, comprising the following steps:

[0021] S1. By retracting the propulsion mechanism, the flexible ring-cutting mechanism and the flexible balancing mechanism are moved away from the pile head;

[0022] S2. Rotate the handwheels of the first and second lead screws to move the spherical base away from the pile head;

[0023] S3. Use a lifting device to hoist the equipment directly above the pile head, slowly lower the equipment, and use the bell-shaped plate to clamp the pile head. Rotate the handwheels of the first and second screws to make the spherical base fit tightly against the pile head.

[0024] S4. By rotating the handwheel of the third lead screw of the lifting mechanism, the saw blade of the flexible circumferential cutting mechanism reaches the elevation of the pile head to be circumferentially cut;

[0025] S5. By rotating the handwheel of the fourth lead screw, the roller of the flexible balancing mechanism comes into contact with the pile head, and the saw blade of the flexible ring cutting mechanism comes into contact with the pile head.

[0026] S6. The operator pushes the slewing bearing to make the equipment circle the pile head once in order to check the alignment of the equipment with the center of the pile head;

[0027] S7. Start the motor and use the propulsion mechanism to make the saw blade of the flexible ring cutting mechanism cut into the pile head to the required depth, then lock the fourth lead screw;

[0028] S8. The operator pushes the slewing bearing to make the equipment perform ring cutting.

[0029] In conjunction with the second aspect, the present invention is further configured such that in step S7, the depth is 30mm to 50mm.

[0030] In summary, the present invention has the following beneficial effects:

[0031] 1. The flared structure allows for rapid self-adaptation and correction of the alignment between the equipment and the pile head center, significantly reducing installation time and improving work efficiency.

[0032] 2. It adopts a modular design structure (detachable connection), which can be quickly disassembled and assembled, and is easy to transport. At the same time, different mounting brackets can be replaced to meet the requirements of pile head circumferential cutting for different pile diameters.

[0033] 3. The flexible circumferential cutting mechanism uses flexible components to minimize damage to the reinforcing steel bars inside the pile head;

[0034] 4. A balancing mechanism is symmetrically arranged in the circumferential cutting mechanism to ensure that the equipment does not tilt during the circumferential cutting process, which not only extends the service life of the equipment, but also keeps the circumferential cutting surface horizontal and ensures the quality of circumferential cutting;

[0035] 5. The lifting mechanism of the equipment can ensure the elevation of the pile head circumferential cutting and improve the accuracy. Attached Figure Description

[0036] Figure 1 This is a three-dimensional schematic diagram of a modular pile head circumferential cutting device with adaptive alignment according to an embodiment of the present invention;

[0037] Figure 2 This is a front view of the hoisting and use of a modular pile head circumferential cutting device with adaptive alignment in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the mounting bracket structure in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the lifting mechanism, propulsion mechanism, and flexible ring-cutting mechanism in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the flexible component structure in an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the ring-cutting component structure in an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the lifting mechanism, propulsion mechanism, and flexible balancing mechanism in an embodiment of the present invention.

[0043] In the diagram: 1. Mounting frame; 2. Lifting mechanism; 3. Propulsion mechanism; 4. Flexible circumferential cutting mechanism; 5. Flexible balancing mechanism; 6. Pile head; 7. Flexible component; 8. Steel wire rope; 9. Lifting point; 10. PTFE plate; 110. Slewing bearing; 120. Mounting plate; 130. Lifting frame plate; 140. First lead screw; 150. Second lead screw; 160. Horn plate; 170. Spherical base; 111. Outer ring; 112. Inner ring; 210. Lead screw; 220. Guide rod; 310. Housing; 320. Fourth lead screw; 410. Motor; 420. Drive gear; 430. Intermediate gear; 440. Saw blade; 450. Circumferential cutting frame; 510. Balancing frame; 520. Roller; 710. First connecting plate; 720. Spring; 730. Guide column; 740. Second connecting plate. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example:

[0046] An adaptive alignment modular pile head circumferential cutting device, such as Figure 1 , Figure 2 As shown, it comprises a mounting frame 1, a lifting mechanism 2, a propulsion mechanism 3, a flexible ring-cutting mechanism 4, and a flexible balancing mechanism 5. The mounting frame 1 is connected to the lifting mechanism 2. The bottom of the lifting mechanism 2 is detachably connected to the propulsion mechanism 3, and the two sides of the propulsion mechanism 3 are detachably connected to the flexible ring-cutting mechanism 4 and the flexible balancing mechanism 5.

[0047] The mounting bracket 1 has a flared plate at its bottom, which is used to hold the pile head 6 in place. The lower diameter of the flared plate is larger than the upper diameter of the flared plate.

[0048] In this invention, all detachable connections are achieved by bolts and nuts, except for flexible component 7, where the detachable connections are achieved by nuts and related parts being threaded together.

[0049] like Figure 3As shown, in this embodiment, the mounting frame 1 includes a slewing bearing 110, a mounting plate 120, a lifting frame plate 130, a first lead screw 140, a second lead screw 150, and a bell-shaped plate. In this embodiment, the slewing bearing 110 is a single-row four-point contact ball bearing 110. The slewing bearing 110 consists of an outer ring 111, an inner ring 112, a spacer block (not shown), balls (not shown), and a sealing strip (not shown). The slewing bearing 110 adopts existing technology and will not be described in detail here. The inner ring 112 of the slewing bearing 110 is detachably connected to a lifting plate 130. The lifting plate 130 is threadedly connected to a first lead screw 140. In this embodiment, the lifting plate 130 adopts a cross-shaped structure. The first lead screw 140 is located at the center of the lifting plate 130. The lifting plate 130 is also threadedly connected to multiple second lead screws 150, four in this embodiment, which are located on the main line of the lifting plate 130. The second lead screws 150 are arranged around the first lead screw 140. The distance between the second lead screws 150 and the first lead screw 140 can be equal or unequal. When the distance is equal, the multiple second lead screws 150 and the first lead screw 140 form an arc with a center. In addition, the lifting plate 130 can also adopt other shapes such as starfish, and the relationship between the second lead screws 150 and the first lead screw 140 is similar to that described above. A trapezoidal nut can be provided at the connection between the lifting frame plate 130 and the first lead screw 140 and the second lead screw 150. The trapezoidal nut is threadedly connected to the lead screw 210, and the trapezoidal nut is detachably connected to the lifting frame plate 130. A handwheel is provided at the end of the first lead screw 140 and the second lead screw 150 away from the propulsion mechanism 3.

[0050] The bottom of the first lead screw 140 and the bottom of the second lead screw 150 are detachably connected to a spherical base 170. Since the top of the pile head 6 is uneven, the spherical base 170 is used in this embodiment to maximize the adaptation to the complex shape of the top of the pile head 6 and ensure that the equipment is installed horizontally.

[0051] The bottom of the inner ring 112 of the slewing bearing 110 is detachably connected to a bell-shaped plate. The lower diameter of the bell-shaped plate is larger than the diameter of the pile head 6, and the upper diameter is smaller than the diameter of the pile head 6. Therefore, when the mounting frame 1 is lowered, the pile head 6 will be stuck inside the bell-shaped plate.

[0052] The outer ring 111 of the slewing bearing 110 is symmetrically and detachably connected to a mounting plate 120, and the mounting plate 120 is connected to a lifting mechanism 2.

[0053] like Figure 4As shown, the lifting mechanism 2 includes a third lead screw 210 and a guide rod 220. The third lead screw 210 is threadedly connected to the mounting plate 120. A trapezoidal nut can be provided at the connection point on the mounting plate 120, and the trapezoidal nut is detachably connected to the mounting plate 120. The guide rod 220 is slidably connected to the mounting plate 120. The bottom of the lead screw 210 and the guide rod 220 are detachably connected to the propulsion mechanism 3. A handwheel is provided at the end of the third lead screw 210 away from the propulsion mechanism 3.

[0054] like Figure 4 As shown, the propulsion mechanism 3 includes a housing 310 and a fourth lead screw 320. The top of the housing 310 is detachably connected to the lead screw 210 and the guide rod 220. The fourth lead screw 320 is threadedly connected to the middle of the housing 310. A trapezoidal nut can be provided at the connection between the housing 310 and the fourth lead screw 320. The trapezoidal nut is threadedly connected to the lead screw 210 and is detachably connected to the housing 310.

[0055] The pile head 6 to be circumcised has pre-embedded reinforcing bars, but due to errors, the thickness of the pre-embedded reinforcing bars in pile head 6 is inconsistent. Therefore, during the circumcising process, it is possible to circumcise the reinforcing bars. Considering the force difference between circumcising concrete and cutting reinforcing bars, this equipment is equipped with a flexible circumcising mechanism 4. Its principle is that the preset reaction force of spring 720 is exactly equal to the cutting force of cutting concrete. When the saw blade 440 contacts the reinforcing bar, the cutting reaction force is greater than the preset force of spring 720. At this time, the cutting equipment will retreat, while the circumcising equipment will advance, directly bypassing the reinforcing bar, which can minimize damage to the reinforcing bar.

[0056] The flexible ring-cutting mechanism 4 includes a flexible component 7 and a ring-cutting component. The fourth lead screw 320 is detachably connected to the flexible component 7, and the flexible component 7 is fixedly connected to the ring-cutting component.

[0057] The flexible balancing mechanism 5 includes a flexible component 7 and a balancing component. The fourth lead screw 320 is detachably connected to the flexible component 7, and the flexible component 7 is fixedly connected to the balancing component.

[0058] like Figure 5As shown, the flexible component 7 includes a first connecting plate 710 and a second connecting plate 740. The fourth lead screw 320 passes through the first connecting plate 710 and the second connecting plate 740 in sequence, and the end of the fourth lead screw 320 is fixed with a nut. The diameter of the fourth lead screw 320 decreases at the contact point with the first connecting plate 710 until the end, so that the fourth lead screw 320 abuts against the first connecting plate 710. The hole opened in the first connecting plate 710 is adapted to the decreasing diameter of the fourth lead screw 320. A spring 720 is sleeved on the outer surface of the fourth lead screw 320 between the first connecting plate 710 and the second connecting plate 740. At the same time, the guide post 730 also passes through the first connecting plate 710 and the second connecting plate 740 in sequence, and both ends of the guide post 730 are fixed with nuts. Both ends of the guide post 730 are threaded with nuts. A spring 720 can be sleeved on the outer surface of the guide post 730 located between the first connecting plate 710 and the second connecting plate 740. In this embodiment, two sets of guide columns 730 are provided, located on both sides of the fourth lead screw 320, and symmetrically distributed.

[0059] like Figure 6 As shown, the circumferential cutting assembly includes a circumferential cutting frame 450, a motor 410 detachably connected to the circumferential cutting frame 450, a drive gear 420 connected to the output end of the motor 410, an intermediate gear 430 meshing with the drive gear 420, the intermediate gear 430 being rotatably connected to the circumferential cutting frame 450, and a saw blade 440 detachably connected to the gear post of the intermediate gear 430.

[0060] like Figure 7 As shown, the balancing assembly includes a balancing frame 510. The balancing frame 510 has an arc-shaped notch on the side near the flexible circumferential cutting mechanism 4. The radius of the arc-shaped notch is the same as that of the pile head 6. Multiple rollers 520 are mounted along the arc-shaped notch on the balancing frame 510. In this embodiment, there are three rollers 520, all of which are tangent to the pile head 6. Considering the presence of concrete blocks around the pile head 6, the flexible balancing mechanism 5 is specifically designed as a flexible mechanism.

[0061] The propulsion mechanism 3 enables the flexible circumferential cutting mechanism 4 or the flexible balancing mechanism 5 to move forward or backward. To reduce frictional resistance and prevent deformation of the lead screw 210, the lower part of the flexible circumferential cutting mechanism 4 (flexible balancing mechanism 5) contacts the housing 310 and is fitted with a PTFE plate 10. Alternatively, a guide rail can be installed at the end of the housing 310 near the flexible circumferential cutting mechanism 4 (flexible balancing mechanism 5) to better assist the flexible circumferential cutting mechanism 4 or the flexible balancing mechanism 5 in moving forward or backward.

[0062] Example 2:

[0063] A modular pile head circumferential cutting device with adaptive alignment includes the following steps:

[0064] S1. By retracting the propulsion mechanism, the flexible ring-cutting mechanism and the flexible balancing mechanism are moved away from the pile head;

[0065] S2. Rotate the handwheels of the first and second lead screws to move the spherical base away from the pile head;

[0066] S3. Use a lifting device to hoist the equipment directly above the pile head, slowly lower the equipment, and use the bell-shaped plate to clamp the pile head. Rotate the handwheels of the first and second screws to make the spherical base fit tightly against the pile head.

[0067] S4. By rotating the handwheel of the third lead screw of the lifting mechanism, the saw blade of the flexible circumferential cutting mechanism reaches the elevation of the pile head to be circumferentially cut;

[0068] S5. By rotating the handwheel of the fourth lead screw, the roller of the flexible balancing mechanism comes into contact with the pile head, and the saw blade of the flexible ring cutting mechanism comes into contact with the pile head.

[0069] S6. The operator pushes the slewing bearing to make the equipment circle the pile head once in order to check the alignment of the equipment with the center of the pile head;

[0070] S7. Start the motor and use the propulsion mechanism to make the saw blade of the flexible ring cutting mechanism cut into the pile head to the required depth, and then lock the fourth lead screw; the depth is generally 30mm to 50mm;

[0071] S8. The operator pushes the slewing bearing to make the equipment perform ring cutting;

[0072] S9. After the cutting is completed, rotate the handwheel of the fourth lead screw to disengage the saw blade and flexible balancing mechanism of the flexible ring cutting mechanism, turn off the power, and hoist the machine to perform the next pile head ring cutting.

[0073] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular pile head circumferential cutting device with adaptive alignment, characterized in that: The device includes a mounting frame, on both sides of which are symmetrically provided lifting mechanisms. The bottom of the lifting mechanism is detachably connected to a propulsion mechanism, and the propulsion mechanisms on both sides are detachably connected to a flexible ring-cutting mechanism and a flexible balancing mechanism. The mounting frame has a flared plate at the bottom, which is used to hold the pile head in place. The lower diameter of the flared plate is larger than the upper diameter of the flared plate.

2. The adaptive alignment modular pile head circumferential cutting device according to claim 1, characterized in that: The mounting bracket includes a slewing bearing, the inner ring of which is detachably connected to a lifting plate, the middle of which is threaded with a first lead screw, the bottom of which is detachably connected to a bell-shaped plate, and the outer ring of which is symmetrically and detachably connected to mounting plates, the mounting plates being connected to a lifting mechanism.

3. The adaptive alignment modular pile head circumferential cutting device according to claim 2, characterized in that: The lifting platform is also threaded with multiple second lead screws, which are arranged around the first lead screw.

4. The adaptive alignment modular pile head circumferential cutting device according to claim 3, characterized in that: The bottom of both the first lead screw and the bottom of the second lead screw are detachably connected to a base.

5. The adaptive alignment modular pile head circumferential cutting device according to claim 4, characterized in that: The base is a spherical base.

6. The adaptive alignment modular pile head circumferential cutting device according to claim 2, characterized in that: The lifting mechanism includes a third lead screw and a guide rod. The third lead screw is threadedly connected to the mounting plate, and the guide rod is slidably connected to the mounting plate. The bottom of the lead screw and the guide rod is detachably connected to the propulsion mechanism.

7. The adaptive alignment modular pile head circumferential cutting device according to claim 1, characterized in that: The propulsion mechanism includes a housing and a fourth lead screw. The top of the housing is detachably connected to the lead screw and guide rod. The middle of the housing is threadedly connected to the fourth lead screw. The end of the fourth lead screw is detachably connected to a flexible ring-cutting mechanism or a flexible balancing mechanism.

8. The adaptive alignment modular pile head circumferential cutting device according to claim 7, characterized in that: The flexible ring-cutting mechanism includes a flexible component and a ring-cutting component. The fourth lead screw is detachably connected to the flexible component, and the flexible component is fixedly connected to the ring-cutting component.

9. The adaptive alignment modular pile head circumferential cutting device according to claim 1, characterized in that: The flexible balancing mechanism includes a flexible component and a balancing component. The fourth lead screw is detachably connected to the flexible component, and the flexible component is fixedly connected to the balancing component.

10. A modular pile head circumferential cutting device with adaptive alignment according to claim 8 or 9, characterized in that: The flexible component includes a first connecting plate, a second connecting plate, and a guide post. The fourth lead screw passes through the first and second connecting plates in sequence, and the end of the fourth lead screw is fixed with a nut. The diameter of the fourth lead screw decreases at the contact point with the first connecting plate until the end, so that the fourth lead screw abuts against the first connecting plate. The hole opened in the first connecting plate is adapted to the decreasing diameter of the fourth lead screw. A spring is sleeved on the outer surface of the fourth lead screw between the first and second connecting plates. The guide post passes through the first and second connecting plates in sequence, and both ends of the guide post are fixed with nuts. A spring is sleeved on the outer surface of the first cylinder located between the first and second connecting plates.

11. The adaptive alignment modular pile head circumferential cutting device according to claim 8, characterized in that: The circumferential cutting assembly includes a circumferential cutting frame, which is detachably connected to a motor. The output end of the motor is connected to a drive gear, which meshes with an intermediate gear. The intermediate gear is rotatably connected to the circumferential cutting frame, and the gear post of the intermediate gear is detachably connected to a saw blade.

12. The adaptive alignment modular pile head circumferential cutting device according to claim 9, characterized in that: The balancing assembly includes a balancing frame with an arc-shaped notch on the side of the balancing frame near the flexible circumferential cutting mechanism. The radius of the arc-shaped notch is the same as that of the pile head. Multiple rollers are mounted on the balancing frame along the arc-shaped notch.

13. A method of using a pile head circumferential cutting device, characterized in that: The device according to any one of claims 1-12 includes the following steps: S1. By retracting the propulsion mechanism, the flexible ring-cutting mechanism and the flexible balancing mechanism are moved away from the pile head; S2. Rotate the handwheels of the first and second lead screws to move the spherical base away from the pile head; S3. Use a lifting device to hoist the equipment directly above the pile head, slowly lower the equipment, and use the bell-shaped plate to clamp the pile head. Rotate the handwheels of the first and second screws to make the spherical base fit tightly against the pile head. S4. By rotating the handwheel of the third lead screw of the lifting mechanism, the saw blade of the flexible circumferential cutting mechanism reaches the elevation of the pile head to be circumferentially cut; S5. By rotating the handwheel of the fourth lead screw, the roller of the flexible balancing mechanism comes into contact with the pile head, and the saw blade of the flexible ring cutting mechanism comes into contact with the pile head. S6. The operator pushes the slewing bearing to make the equipment circle the pile head once in order to check the alignment of the equipment with the center of the pile head; S7. Start the motor and use the propulsion mechanism to make the saw blade of the flexible ring cutting mechanism cut into the pile head to the required depth, then lock the fourth lead screw; S8. The operator pushes the slewing bearing to make the equipment perform ring cutting.

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