Pile bittter

Abstract

The present application relates to pile foundation construction technical field, disclose a pile head machine, including annular plate, fastening mechanism and chisel mechanism, fastening mechanism includes several drive links and several self-adapting links, drive link is all with annular plate sliding connection, self-adapting link is respectively rotationally connected in both ends of drive link, and both ends of self-adapting link are all connected positioning fastening plate, and positioning fastening plate is distributed in the inside of annular plate in circumference;Chisel mechanism includes several driving members and several drill rods, driving member is all detachably connected on annular plate, drill rod is respectively connected with driving member, and drill rod is all located in the middle of positioning fastening plate, to solve the problem that the level of the existing pile head machine is not enough after being connected with the pile body, resulting in the truncated surface after chiseling is inclined plane, and the need for secondary processing.

Description

Technical Field

[0001] This invention relates to the field of pile foundation construction technology, specifically to a pile head chisel. Background Technology

[0002] During the pile foundation construction phase of building engineering, air bubbles or pore air within the concrete rise to the top of the pile during concrete pouring, while the aggregate sinks due to gravity, resulting in a certain area of ​​laitance at the pile top. To ensure the overall structural strength of the pile foundation, this laitance section at the pile top needs to be removed later. New concrete is then poured onto the removed section according to construction requirements to ensure the overall structural strength of the pile after completion. Currently, to improve the speed of pile top removal, construction companies often use pile head chisels.

[0003] Existing pile head chisels typically utilize a hydraulic power unit to provide pressure to multiple cylinders. These cylinders drive chisels to squeeze and break the pile from its perimeter, achieving the purpose of cutting off and removing the top portion of the pile. However, in actual construction, pile head chisels often encounter problems such as: the pile body is not perfectly round, with protrusions or depressions. When a conventional pile head chisel is installed on the pile, the machine's level is insufficient, resulting in an inclined cut surface at the top of the broken pile. This inclined surface is not conducive to secondary pouring, requiring manual secondary processing with tools. Consequently, this leads to reduced pile foundation construction efficiency, extended construction period, and increased construction costs. Summary of the Invention

[0004] The present invention aims to provide a pile head chisel to solve the problem that existing pile head chisels are not level enough after being connected to the pile body, resulting in an inclined cut surface after chiseling, which requires secondary processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pile head chisel, comprising an annular plate, a fastening mechanism, and a chiseling mechanism. The fastening mechanism includes several driving links and several adaptive links. The driving links are all slidably connected to the annular plate, and the adaptive links are rotatably connected to both ends of the driving links. Both ends of the adaptive links are connected to positioning fastening plates, which are circumferentially distributed on the inner side of the annular plate. The chiseling mechanism includes several driving components and several chisels. The driving components are detachably connected to the annular plate, and the chisels are connected to the driving components. The chisels are all located in the middle of the positioning fastening plates.

[0006] The beneficial effects of this solution are as follows: the pile head chisel is fixed by a number of positioning fastening plates that are circumferentially distributed, and the positioning fastening plates are adjusted by an adaptive connecting rod. Even when the pile body is irregular, the positioning fastening plates can be kept in close contact with the pile body, thereby ensuring that the ring plate is on a horizontal plane after fixing, and thus ensuring that the chisel rods are on a horizontal plane. Finally, the cross-section after chiseling is horizontal, eliminating the need for secondary chiseling by human workers and improving work efficiency.

[0007] 1. By setting all the drill rods in the middle of the positioning fastening plates, it can be ensured that the cross-section of the pile is located in the middle position of all the positioning fastening plates. The remaining pile below the cross-section can ensure that all the positioning fastening plates remain stationary, thereby positioning the pile above the cross-section by the positioning fastening plates. This prevents the top of the removed pile from immediately tilting and injuring the operators or the pile head chisel, thus improving the safety of the operation.

[0008] 2. The hydraulic cylinder is designed to be detachable. If it is impossible to avoid the reinforcing bars, the hydraulic cylinder can be removed directly to prevent damage to the chisel and reinforcing bars.

[0009] 3. When the pile body is irregular, the adaptive link can be moved synchronously by driving the linkage, which in turn moves the positioning fastening plates at both ends. When one of the positioning fastening plates is in place and fits against the pile body and cannot move, while the other positioning fastening plate is not yet in place, the adaptive link can still be rotated under the action of the continuing driving link. This ensures that the positioning fastening plates at both ends are firmly fitted against the pile body under simple operation, improving the convenience of machine use.

[0010] 4. Compared with existing hoisting and chiseling methods, the structural strength of different locations on the pile top may vary, resulting in some chisels being chiseled smoothly while others are chiseled more slowly. Furthermore, uneven stress on the internal chisels can cause the pile head chiseling machine to deflect, increasing the tilt and unevenness of the cross-section. In this embodiment, the positioning and fastening plate holds the pile body tightly throughout the chiseling process. The chisel that completes the chiseling first experiences less stress, while the chisel currently chiseling experiences greater stress. The positioning and fastening plates block the uneven forces during this process, keeping the annular plate level. This further ensures that the chisels on the annular plate will not deflect even when the chiseling progress is different, further improving the levelness and flatness of the cross-section.

[0011] Preferably, the positioning fastening plate includes a U-shaped bracket and several single plates. The U-shaped bracket is elastic, and the several single plates are connected to the two ends and the middle end of the U-shaped bracket. Each single plate is provided with a fitting groove.

[0012] The beneficial effects of this solution are as follows: 1. The U-shaped bracket is elastic. By connecting the single plates to the U-shaped bracket in sequence, the deflection connection of the single plates on both sides can be achieved under the action of the spring steel plate. When the drive rod is adjusted to drive the adaptive connecting rod to move the positioning fastening plate to fix the pile body, the rotatable single plates on both sides can better adapt to the outer contour of the pile body, further improving the fastening of the mating surface of the positioning fastening plate.

[0013] 2. The flexible U-shaped support can act as a buffer between the pile and the pile head drilling machine, reducing the impact of drilling vibration on the pile structure and lowering the possibility of loosening of the remaining pile structure.

[0014] Preferably, an adjusting component is provided between the drive connecting rod and the annular plate. The adjusting component includes a screw and a nut. The nut is located on the drive connecting rod, and one end of the screw passes through the nut and is rotatably connected to the annular plate.

[0015] Preferably, the annular plate is provided with several dovetail grooves, each of which is equipped with a slider, and several driving components are respectively connected to several sliders.

[0016] Preferably, all driving components are hydraulic cylinders, and all hydraulic cylinders are connected to the same manual hydraulic pump.

[0017] Preferably, it also includes a plurality of baffles, all of which are connected to the slider, and a buffer space is formed between the baffles and the slider.

[0018] Preferably, the upper ends of several baffles form a circular support surface, and the circular support surface abuts against the pile body. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the pile head drilling machine in an embodiment of the present invention; Figure 2 This is a three-dimensional view of the pile head drilling machine after it has been rotated 180° in an embodiment of the present invention, viewed from above. Figure 3 This is a three-dimensional view of the positioning fastening plate in an embodiment of the present invention; Figure 4 This is a three-dimensional view of the dovetail groove in an embodiment of the present invention; Figure 5 This is a three-dimensional view of the baffle in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the pile-driving machine in an embodiment of the present invention, taken from a horizontal plane. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: annular plate 1, dovetail groove 11, connecting seat 12, drive connecting rod 2, screw 21, cross knob 211, nut 22, adaptive connecting rod 3, connecting column 31, strip hole 32, square connecting block 33, limit block 34, hydraulic cylinder 4, manual hydraulic pump 41, slider 42, chisel 5, positioning fastening plate 6, single plate 61, fitting groove 62, U-shaped bracket 63, baffle 7, buffer part 71, and support part 72.

[0021] Example The basic implementation examples are as follows: Figure 1-5 As shown, Figure 1 The pile head chisel shown includes an annular plate 1, a fastening mechanism, and a chiseling mechanism. The annular plate 1 is used to support and connect the fastening mechanism and the chiseling mechanism. The fastening mechanism is used to fix the pile head chisel to the pile body in a certain horizontal position so that the cross-section of the pile top after chiseling is relatively horizontal, thereby avoiding secondary manual chiseling and ensuring construction efficiency. The chiseling mechanism is used to squeeze and cut off the pile head to achieve chiseling.

[0022] Existing pile head chisels, designed to accommodate piles of various sizes, have a large internal diameter. They are then hoisted onto the pile using an excavator or crane. Since the chisel doesn't directly contact the pile, its chiseling mechanism alone breaks the pile. This lack of fixation makes the chisel prone to tilting, resulting in a skewed cross-section. Furthermore, the hoisting method causes significant vibration during the chiseling process, leading to problems such as concrete fragments flying everywhere and the pile shaking, affecting its structural strength. While pile head chiseling is faster and safer than traditional manual chiseling, the inherent problems of skewed cross-sections and the tendency for the remaining pile to loosen hinder its further application and technological development. Based on this, the present invention proposes a pile head chisel that breaks through the existing hoisting operation method, improves the chiseling quality, and reduces the difficulty of using the pile head chisel, so as to help the pile head chisel further meet the construction needs.

[0023] like Figure 2 As shown, the fastening mechanism includes several fastening components. In this embodiment, two sets of fastening components are provided. Each set of fastening components includes a drive link 2 and two adaptive links 3. An adjusting component is provided between the drive link 2 and the annular plate 1 for sliding connection. The adjusting component includes a screw 21 and a nut 22. The nut 22 is welded and fixed to the middle side of the drive link 2. A cross knob 211 is fixed to one end of the screw 21. The other end of the screw 21 passes through the nut 22 and is rotatably connected to the annular plate 1. The specific method of rotatable connection is as follows: Figure 6As shown: A connecting seat 12 is welded to the bottom of the annular plate 1. A circular blind hole is opened on the connecting seat 12. The end of the screw 21 away from the cross knob 211 is unthreaded, and the unthreaded end is rotatably connected to the blind hole. Two adaptive connecting rods 3 are rotatably connected to the two ends of the driving connecting rod 2 via a connecting column 31. The adaptive connecting rods 3 are all V-shaped. Each adaptive connecting rod has a positioning fastening plate 6 connected to both ends. All positioning fastening plates 6 are circumferentially distributed within the annular ring of the annular plate 1. The positioning fastening plates 6 are connected as follows: a strip hole 32 is opened at each end of the adaptive connecting rod 3, and several square positioning holes are opened on the annular plate 1. A square connecting block 33 is slidably connected in each positioning hole. A connecting rod is welded to the end of the square connecting block 33. The other end of the connecting rod is passed through the strip hole 32 and a limiting block 34 is fixed. At the same time, the positioning fastening plate 6 is vertically welded to the end of the square connecting block 33 away from the connecting rod. This ensures that when the adaptive connecting rod 3 moves toward the center of the annular plate 1, it drives the square connecting block 33 in the positioning hole to move radially toward the center of the annular plate 1, thereby realizing that all positioning fastening plates 6 are retracted and fastened toward the pile body. Furthermore, after setting, all positioning fastening plates 6 are located on the same horizontal plane, which can ensure that the annular plate 1 is located on the horizontal plane, so that the pile head chisel installed on the pile body is on the horizontal plane, thereby ensuring that the cut surface is flat after chiseling.

[0024] like Figure 3 As shown, each positioning fastening plate 6 includes several single plates 61, and in this embodiment, three single plates 61 are provided. Each single plate 61 has several elongated fitting grooves 62 on its mating surface. When relatively small protrusions or depressions appear in the pile body, the fitting grooves 62 allow the mating surface of the single plate 61 to fit more fully with the pile body, improving the fastening effect. Each single plate 61 is rotatably connected to a square connecting block 33. Specifically, a U-shaped bracket 63 is welded onto the square connecting block 33. The U-shaped bracket 63 is a spring steel sheet. The three single plates 61 are welded sequentially to the two ends and the middle of the U-shaped bracket 63, allowing the single plates 61 on both sides to deflect under the action of the spring steel sheet. When adjusting the drive linkage to move the adaptive linkage 3 and fix the positioning fastening plate 6 to the pile body, the rotatable single plates 61 on both sides can better adapt to the outer contour of the pile body, further improving the fastening of the mating surface of the positioning fastening plate 6. In addition, since the pile head chisel will vibrate during the chiseling process, the elastic U-shaped support 63 can act as a buffer between the pile body and the pile head chisel, reducing the impact of the chiseling vibration on the pile structure and reducing the possibility of loosening of the remaining pile structure.

[0025] When the pile head chisel is fixed to the pile body using fastening components, the adaptive connecting rod 3 is rotatably connected to both ends of the drive connecting rod 2. When the pile body is irregular, rotating the screw 21 first moves the drive connecting rod 2 closer to the pile body. The adaptive connecting rod 3 moves synchronously, causing the positioning fastening plates 6 at both ends to move. When one positioning fastening plate 6 is in position and cannot move further than the other, the adaptive connecting rod 3 can still rotate under the action of the continuing drive connecting rod 2. This ensures that both positioning fastening plates 6 are firmly attached to the pile body with simple operation. Simultaneously, with the adjustment of the rotatable single plates 61 at both ends of the U-shaped bracket 63, both plates 61 can be attached to the pile body. This ensures that the pile head chisel can fasten the pile head while keeping the annular plate 1 perpendicular to the positioning fastening plate 6 horizontal, laying the foundation for the chiseling mechanism to horizontally cut and chisel the pile body.

[0026] like Figure 1 As shown, the chiseling mechanism includes several driving components and several chisels 5. Each chisel 5 is connected to a driving component one-to-one, and the driving component drives the chisels 5 to chisel the pile body. In this embodiment, the driving component is a hydraulic cylinder 4, and the chisels 5 are fixed to the telescopic rod of the hydraulic cylinder 4. Several hydraulic cylinders 4 are evenly arranged around the annular plate 1, and all hydraulic cylinders 4 are distributed intermittently between several positioning fastening plates 6 to improve the uniformity of the interaction force distribution between the fastening mechanism and the chiseling mechanism during the chiseling process, so that the U-shaped bracket 63 can better absorb vibration and further avoid the stability of the remaining pile body structure due to excessive vibration. Meanwhile, after connection, the drill bits of all the drill rods 5 are located in the middle of the positioning fastening plate 6. That is, after the drill rods 5 move to break the pile, the cross-section of the pile is located in the middle of all the positioning fastening plates 6. The remaining pile below the cross-section can ensure that all the positioning fastening plates 6 remain stationary, thereby positioning the pile above the cross-section with the positioning fastening plate 6, preventing the top of the demolished pile from immediately tilting and injuring the operators or the pile head chisel. The positioning fastening plate 6 stabilizes the top of the demolished pile, which can then be moved away by the operators together, improving the safety of the operation. Furthermore, compared with existing hoisting and chiseling methods, the structural strength of different positions on the pile top may vary. Therefore, some chisels 5 are chiseled smoothly while others are chiseled relatively slowly. This uneven force on the internal chisels 5 can cause the pile head chiseling machine to deflect, increasing the tilt and unevenness of the cross-section. In this embodiment, the positioning fastening plate 6 holds the pile body tightly throughout the chiseling process. The force on the chisel 5 that is chiseled first is reduced, while the force on the end of the chisel 5 that is currently chiseling is greater. The positioning fastening plate blocks the uneven force during this process, keeping the annular plate 1 horizontal. This further ensures that the chisels 5 set on the annular plate 1 will not deflect even when the chiseling progress is different, further improving the horizontality and flatness of the cross-section.

[0027] Hydraulic cylinder 4 is detachably connected to annular plate 1, as detailed below. Figure 4 As shown: A dovetail groove 11 is made on the annular plate 1, between the positioning holes. Dovetail-shaped limiting parts are provided on both sides of the dovetail groove 11. A slider 42 is fitted and fixed onto the hydraulic cylinder 4. Dovetail-shaped sliding grooves are provided on both sides of the slider 42. The slider 42 is slidably engaged in the dovetail groove 11 from top to bottom. The dovetail groove 11 and slider 42 cooperate to limit the hydraulic cylinder 4 in the horizontal direction, ensuring that the hydraulic cylinder 4 will not retract during the chiseling process and affect the function of the chisel 5. Since the pile body contains several reinforcing bars to increase the strength of the concrete and prevent cracking, and the reinforcing bar structure is robust, if the chisel 5 collides with the reinforcing bars during chiseling, not only will the chisel tip of the chisel 5 be worn, but the reinforcing bars will also be damaged. This will damage the remaining pile body, and the damaged reinforcing bars will reduce the strength of the newly poured pile structure. Therefore, the hydraulic cylinder 4 is detachably connected to the annular plate 1. When the pile head chisel is fitted onto the pile body using the fastening assembly, the chisel can be rotated to avoid the drill rod 5 from the exposed rebar, based on the location of the rebar. If avoidance is not possible, the hydraulic cylinder 4 at that location can be removed to prevent the drill rod 5 from colliding with the rebar. Furthermore, in this embodiment, all hydraulic cylinders 4 are connected to the same manual hydraulic pump 41. The chiseling operation is performed manually by operating the manual hydraulic pump 41, increasing the pressure inside the hydraulic cylinder 4, thereby driving the drill rod 5 forward to squeeze the pile head, breaking the concrete and achieving the purpose of breaking the laitance in the pile head. This allows for pile head chiseling and demolition without the need for power supply, enabling the pile head chisel to adapt to more construction environments and reducing chiseling costs.

[0028] Finally, it also includes several baffles 7, all of which are spring steel plates. These baffles 7 are fixed to the side of the slider 42 near the chisel rod 5 to block the concrete blocks generated during the chiseling process, further ensuring the safety of the chiseling and reducing the difficulty of cleaning up the work site after the pile chiseling is completed. Figure 5As shown, each baffle 7 has through holes for the extension and retraction of the drill rod 5. The baffle 7 includes a buffer part 71 and a support part 72. The buffer part 71 protrudes away from the slider 42 and forms a buffer space with the slider 42. The buffer part 71 buffers and blocks the splashing concrete blocks, preventing the concrete blocks from directly impacting or indirectly damaging the hydraulic cylinder 4 due to the impact of the baffle 7, thereby protecting the hydraulic cylinder 4 in the slider 42. The support part 72 is inclined towards the pile body, and the top surface of all the support parts 72 forms a circular support surface, which abuts against the pile body. The inclined support part 72 blocks the top of the cut surface, further improving the blocking effect of the baffle 7 on the splashing concrete blocks. At the same time, the circular support surface can also support the pile top above the cut surface and above the positioning fastening plate 6, improving the support effect on the pile top during demolition, further preventing the pile top from immediately collapsing after the cut, and improving the safety of the operation.

[0029] Actual testing revealed that the spaced-out baffles 7 effectively block the concrete blocks produced after chiseling. These baffles also provide space for the separated concrete blocks, ensuring all blocks have a place to go. Furthermore, because baffles 7 are made of spring steel, the impact of flying concrete blocks against them during chiseling produces significant noise, which decreases sharply after chiseling is complete. This allows workers to determine the completion time and promptly stop the operation by manually controlling the hydraulic pump 41, further improving the efficiency of chiseling and removing the pile top.

[0030] The pile head chisel provided in this solution has a simple structure. During operation, it can be manually attached and fixed to the pile body. Compared with hoisting operations, it can more accurately determine the cutting position, avoiding the removal of piles that meet structural strength requirements and increasing construction costs. At the same time, the adjustable positioning and fastening plate 6 ensures the stability of the pile head chisel installation, adapts to irregular pile bodies, improves the flatness of the cut surface, avoids secondary manual processing, and thus improves work efficiency. It also buffers the impact of vibration generated during chiseling on the remaining pile body, ensuring the structural strength of the remaining pile body, thereby further improving work efficiency. Compared with existing pile head chisels that only consider cutting and chiseling, this solution has made more comprehensive improvements and designs based on the actual situation of chiseling operations, and has a wider range of applicability.

[0031] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A pile head drilling machine, characterized in that: The device includes an annular plate, a fastening mechanism, and a chiseling mechanism. The fastening mechanism comprises several driving links and several adaptive links. The driving links are all slidably connected to the annular plate, and the adaptive links are rotatably connected to both ends of the driving links. Both ends of the adaptive links are connected to one end of a square connecting block through a slotted hole. The square connecting block is slidably disposed inside the annular plate, and the other end of the square connecting block is connected to a positioning fastening plate. The positioning fastening plates are distributed circumferentially on the inner side of the annular plate. The chiseling mechanism comprises several driving components and several chisels. The driving components are detachably connected to the annular plate, and the chisels are connected to the driving components. The movement of the chisels chisels the pile body, and the cross-section of the pile body is located in the middle position of all the positioning fastening plates. The positioning fastening plate comprises a U-shaped bracket and several single plates. The U-shaped bracket is elastic, and the single plates are connected to both ends and the middle position of the U-shaped bracket. Each single plate is provided with a fitting groove. An adjusting component is provided between the drive connecting rod and the annular plate. The adjusting component includes a screw and a nut. The nut is located on the drive connecting rod, and one end of the screw passes through the nut and is rotatably connected to the annular plate. The annular plate has several dovetail grooves, each containing a slider, and several driving components are connected to the sliders respectively.

2. The pile head drilling machine according to claim 1, characterized in that: All driving components are hydraulic cylinders, and all hydraulic cylinders are connected to the same manual hydraulic pump.

3. The pile head drilling machine according to claim 2, characterized in that: It also includes several baffles, all of which are connected to the slider, and a buffer space is formed between the baffles and the slider.

4. The pile head drilling machine according to claim 3, characterized in that: The upper ends of several baffles form a circular support surface, and the circular support surface abuts against the pile body.

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