Static pressure-high-frequency micro-vibration dual-mode pile planting equipment for steel sheet pile construction

Abstract

The invention discloses static pressure-high-frequency micro-vibration dual-mode pile planting equipment for steel sheet pile construction, and relates to the technical field of pile planting equipment. The static pressure-high-frequency micro-vibration dual-mode pile planting equipment comprises a holding claw assembly mounted on a seat plate of a pile planting machine; the holding claw assembly comprises two holding units arranged on the base plate, each holding unit comprises a holding arm rotationally connected to the base plate, and the holding arm has a holding station for holding the steel sheet pile in the rotating process relative to the base plate; the movable part is movably arranged on the seat plate, and the movable part is rotationally connected with the extension rod on the holding arm; the locking mechanism comprises a one-way rack fixedly connected to the seat plate; through the self-locking design of the one-way rack and the first wedge-shaped block, reliable clamping can be achieved in a static pressure mode without continuous energy supply; and moreover, when the driving mechanism loses power or breaks down, the one-way rack is engaged with the first wedge-shaped block, the embracing arm cannot be loosened, safe failure protection is achieved, and the steel sheet pile can be effectively prevented from falling off accidentally.

Description

A static pressure-high frequency micro-vibration dual-mode pile driving device for steel sheet pile construction Technical Field

[0001] This invention relates to the field of pile driving equipment technology, specifically to a static pressure-high frequency micro-vibration dual-mode pile driving equipment for steel sheet pile construction. Background Technology

[0002] Steel sheet pile construction is widely used in foundation pit support, water conservancy projects, and wharf construction. Currently, vibratory pile drivers or static pressure pile drivers are mainly used for construction.

[0003] Vibration mechanisms utilize high-frequency vibration to liquefy the soil around the pile, reducing pile end resistance and thus enabling rapid pile driving. However, they suffer from significant construction noise, causing serious disturbance to the surrounding environment, especially limiting nighttime construction in residential areas; simultaneously, the vibration disturbs nearby buildings and underground pipelines, posing safety hazards; and, when the amplitude is large, it can easily damage the pile head, affecting the reusability of the sheet piles.

[0004] Static pressure pile drivers utilize pre-existing reaction piles to provide reaction force, using hydraulic cylinders to statically press sheet piles into the soil. Their advantages include no noise, no vibration, minimal impact on the surrounding environment, and minimal damage to the pile body. However, when encountering dense sand, gravel, or hard clay layers, the pressing force is insufficient, often requiring pre-drilling, leading to reduced construction efficiency and increased complexity.

[0005] Based on the aforementioned existing technology, the vibration mechanism and the static pressure pile planting mechanism can be installed in series, allowing one of the modes to be used for pile planting as needed. However, regardless of whether it is the static pressure mode or the high-frequency micro-vibration mode, a corresponding gripper mechanism is required to assist the steel sheet pile in the planting process. Both the static pressure mode and the high-frequency micro-vibration mode gripper mechanisms use hydraulic cylinders to achieve the clamping effect. Therefore, there is a risk of cylinder explosion. If the cylinder explodes, the hydraulic rod will not be able to drive the gripper arm to clamp the steel sheet pile, creating a significant safety hazard in the field. Summary of the Invention

[0006] The purpose of this invention is to provide a static pressure-high frequency micro-vibration dual-mode pile planting device for steel sheet pile construction, so as to solve the problem that the hydraulic cylinder in the prior art has the risk of cylinder explosion. Once the cylinder explodes, its hydraulic rod will not be able to drive the gripper arm of the gripper mechanism to grip the steel sheet pile, which makes the on-site working environment extremely dangerous.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a static pressure-high frequency micro-vibration dual-mode pile planting device for sheet pile construction, comprising a gripper assembly mounted on the base plate of the pile planting machine; the gripper assembly includes two clamping units arranged on the base plate, each clamping unit comprising: a gripping arm, which is rotatably connected to the base plate, and the gripping arm has a clamping position for clamping the sheet pile during rotation relative to the base plate; a movable part, which is movably disposed on the base plate, and the movable part is rotatably connected to an extension rod on the gripping arm; a locking mechanism, which includes a one-way rack fixedly connected to the base plate, and a first wedge block fixedly connected to the movable part for one-way engagement with the one-way rack; a driving mechanism, the stroke of which drives the movable part to move horizontally relative to the base plate to position the gripping arm in the clamping position, or drives the movable part to move vertically relative to the base plate to disengage the first wedge block from the one-way rack, thereby disengaging the gripping arm from the clamping position.

[0008] Furthermore, an elastic telescopic rod is provided between the movable part and the seat plate, with one end of the elastic telescopic rod slidably connected to the seat plate and the other end fixedly connected to the movable part.

[0009] Furthermore, the driving mechanism includes a driving cylinder mounted on the base plate, and a first rod and a second rod are coaxially and sequentially fixedly connected to the hydraulic rod of the driving cylinder, and the movable part is provided with a slot for the second rod to slide.

[0010] Furthermore, the diameter of the second rod is smaller than that of the first rod, and the width of the slot is greater than the diameter of the second rod but smaller than the diameter of the first rod.

[0011] Furthermore, a second wedge block is fixedly connected to the movable part, and a third wedge block is fixedly connected to the second rod. During the process of the arm disengaging from the clamping position, the inclined surface of the third wedge block abuts against the wedge surface of the second wedge block to make the movable part move vertically relative to the seat plate.

[0012] Furthermore, the arm of the arm has several anti-slip steel patterns on its surface.

[0013] Furthermore, a slider is fixedly installed at one end of the elastic telescopic rod, and a guide groove is provided on the base plate for the slider to slide linearly.

[0014] Furthermore, the sawtooth angle of the first wedge block is adapted to the sawtooth angle of the one-way rack. When the first wedge block meshes with the one-way rack, the arm generates self-locking when subjected to the reverse force of the sheet pile.

[0015] Furthermore, the two clamping units are arranged symmetrically on the left and right sides when they are clamping, and the clamping center line of the two clamping arms coincides with the central axis of the steel sheet pile.

[0016] Furthermore, a connecting rod is fixedly connected to the movable part, and the connecting rod and the extension rod are rotatably connected via a pivot.

[0017] Compared with the prior art, the present invention provides a static pressure-high frequency micro-vibration dual-mode pile planting device for steel sheet pile construction. Through the self-locking design of the unidirectional rack and the first wedge block, it can reliably clamp the pile without continuous power supply in static pressure mode. Furthermore, when the drive mechanism loses power or malfunctions, the unidirectional rack and the first wedge block remain engaged, and the clamping arm cannot be released, providing a safety failure protection that can effectively prevent the steel sheet pile from accidentally falling off. Attached Figure Description

[0018] To provide a clearer description of the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments will be briefly introduced below.

[0019] Figure 1 is a schematic diagram of the gripper assembly structure provided in the embodiment; Figure 2 is a schematic diagram of the clamping unit structure provided in the embodiment; Figure 3 is a partial structural schematic diagram of the clamping unit provided in the embodiment; Figure 4 is a schematic diagram of the locking mechanism structure provided in the embodiment; Figure 5 is a schematic diagram of the moving part structure provided in the embodiment.

[0020] Explanation of reference numerals in the attached drawings: 1. Arm; 2. Movable part; 3. Locking mechanism; 31. One-way rack; 32. First wedge block; 4. Drive mechanism; 41. Drive cylinder; 42. First rod; 43. Second rod; 5. Elastic telescopic rod; 6. Second wedge block; 7. Third wedge block; 8. Slider; 9. Guide groove; 10. Hole groove; 11. Seat plate; 12. Connecting rod; 13. Extension rod; 14. Rotating shaft. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Please refer to Figures 1-5. An embodiment of the present invention provides a static pressure-high frequency micro-vibration dual-mode pile driving device for sheet pile construction, including a gripper assembly mounted on a base plate 11 of the pile driving machine. The gripper assembly includes two clamping units arranged on the base plate 11. Each clamping unit includes a gripping arm 1, a movable part 2, a locking mechanism 3, and a driving mechanism 4. The gripping arm 1 is rotatably connected to the base plate 11, and the process of the gripping arm 1 rotating relative to the base plate 11 has a clamping position for clamping the sheet pile. The movable part 2 is movably disposed on the base plate 11. The movable part 2 is rotatably connected to the extension rod on the clamping arm 1; the locking mechanism 3 includes a one-way rack 31 fixedly connected to the seat plate 11, and a first wedge block 32 that engages with the one-way rack 31 in a one-way manner is fixedly connected to the movable part 2; the driving mechanism 4 drives the movable part 2 to move horizontally relative to the seat plate 11 so that the clamping arm 1 is in the clamping position, or drives the movable part 2 to move vertically relative to the seat plate 11 so that the first wedge block 32 disengages from the one-way rack 31, so that the clamping arm 1 disengages from the clamping position. The clamping arms 1 of the two clamping units are arranged symmetrically from left to right in the clamping position, and the clamping center lines of the two clamping arms 1 coincide with the central axis of the sheet pile. A connecting rod 12 is fixedly connected to the movable part 2, and the connecting rod 12 and the extension rod 13 are rotatably connected via a rotating shaft 14.

[0023] Specifically, when the first wedge block 32 engages with the one-way rack 31, the clamping arm 1 self-locks under the reverse force of the sheet pile. That is, the more the sheet pile tends to break free, the tighter the engagement between the first wedge block 32 and the one-way rack 31, preventing the clamping arm 1 from releasing. This self-locking characteristic allows the clamping arm to maintain its clamping position without continuous power supply in static pressure mode, saving energy and ensuring safety. An elastic telescopic rod 5 is provided between the movable part 2 and the seat plate 11, with one end slidably connected to the seat plate 11 and the other end fixedly connected to the movable part 2. A slider 8 is fixedly installed at one end of the elastic telescopic rod 5, and a guide groove 9 is provided on the seat plate 11 for the slider 8 to slide linearly. Specifically, the elastic telescopic rod 5 allows the movable part 2 to have a vertical movement path relative to the seat plate 11 and to be able to reset.

[0024] The drive mechanism 4 includes a drive cylinder 41 mounted on the base plate 11. A first rod 42 and a second rod 43 are coaxially and sequentially fixedly connected to the hydraulic rod of the drive cylinder 41. The movable part 2 has a slot 10 for the second rod 43 to slide through. The diameter of the second rod 43 is smaller than that of the first rod 42, and the width of the slot 10 is greater than the diameter of the second rod 43 but smaller than the diameter of the first rod 42. It should be noted that because the diameter of the first rod 42 is greater than the width of the slot 10, the second rod 43 will not penetrate the slot 10, thus enabling the movable part 2 to move horizontally. Furthermore, because the diameter of the second rod 43 is smaller than that of the first rod 42, there is initially no contact between the second rod 43 and the movable part 2 until the first rod 42 comes into contact with the movable part 2, thus not affecting each movement of the movable part 2.

[0025] The movable part 2 is fixedly connected to a second wedge block 6, and the second rod 43 is fixedly connected to a third wedge block 7. During the process of the arm 1 disengaging from the clamping position, the inclined surface of the third wedge block 7 abuts against the wedge surface of the second wedge block 6, allowing the movable part 2 to move vertically relative to the seat plate 11. It should be noted that both the wedge surfaces of the second wedge block 6 and the third wedge block 7 are smooth surfaces, thereby reducing friction between them and lowering the wear rate.

[0026] Based on the above, during the process of the drive mechanism 4 driving the arm 1 to move to the clamping position, the first rod 42 and the second rod 43 will move synchronously with the hydraulic rod of the drive cylinder 41 until the first rod 42 abuts the movable part 2, and at this time the second wedge block 6 and the third wedge block 7 will gradually separate; and when they separate, the elastic telescopic rod 5 will immediately restore its elastic deformation so that the first wedge block 32 and the one-way rack 31 can mesh and cooperate.

[0027] The clamp arm 1 has several anti-slip steel grooves on its surface. The grooves of the anti-slip steel grooves are used to enhance the friction between the clamp arm 1 and the sheet pile, so that the two clamp arms 1 have better stability when clamping the sheet pile.

[0028] The sawtooth angle of the first wedge block 32 is matched with the sawtooth angle of the one-way rack 31. When the first wedge block 32 meshes with the one-way rack 31, the arm 1 generates self-locking when subjected to the reverse force of the sheet pile.

[0029] Based on the above, the clamping process is as follows: the hydraulic rod of the drive cylinder 41 extends, pushing the first rod 42 and the second rod 43 towards the movable part 2. Since the diameter of the first rod 42 is larger than the width of the slot, the first rod 42 will push the movable part 2 to move horizontally. When the movable part 2 moves horizontally, it drives the clamping arm 1 to swing around the rotation axis through the extension rod, gradually clamping the steel sheet pile; and, as the movable part 2 moves horizontally, the first wedge block 32 fixed on it gradually approaches the one-way rack 31. When the clamping arm 1 reaches the clamping position, the first wedge block 32 and the one-way rack 31 are fully engaged, locking the movable part 2 in this position. At this time, even if the drive cylinder 41 is unloaded, due to the self-locking characteristic of the one-way rack 31, the movable part 2 cannot move in the opposite direction, the clamping arm 1 remains in the clamping state, and reliably clamps the steel sheet pile.

[0030] Release process: The hydraulic rod of the drive cylinder 41 resets. Since the movable part 2 is locked by the one-way rack 31 and cannot move horizontally, the second rod 43 resets and moves within the slot. At this time, the third wedge block 7 fixed on the second rod 43 abuts against the second wedge block 6 on the movable part 2, thereby driving the movable part 2 to overcome the elastic force of the elastic telescopic rod 5 and move vertically upward. When the movable part 2 moves upward, the first wedge block 32 moves upward accordingly, disengaging from the one-way rack 31 and unlocking the movable part 2; and the reset movable part 2 drives the clamping arm 1 to swing in the opposite direction through the extension rod, disengaging from the clamping position and releasing the sheet pile.

[0031] The foregoing description of certain exemplary embodiments of the present invention should not be construed as limiting the scope of protection of the claims. Those skilled in the art will recognize that the described embodiments can be modified in other ways without departing from the spirit and scope of the invention.

Claims

1. A static pressure-high frequency micro-vibration dual-mode pile driving device for sheet pile construction, comprising a gripper assembly mounted on the base plate of the pile driving machine; characterized in that, The gripper assembly includes two gripping units arranged on the base plate. Each gripping unit includes: a gripping arm rotatably connected to the base plate, and the gripping arm rotating relative to the base plate has a gripping position for gripping the sheet pile; a movable part movably disposed on the base plate, and the movable part is rotatably connected to an extension rod on the gripping arm; a locking mechanism including a one-way rack fixedly connected to the base plate, and a first wedge block fixedly connected to the movable part for one-way engagement with the one-way rack; and a driving mechanism whose stroke for driving the movable part includes driving the movable part to move horizontally relative to the base plate to position the gripping arm in the gripping position, or driving the movable part to move vertically relative to the base plate to disengage the first wedge block from the one-way rack, thereby disengaging the gripping arm from the gripping position.

2. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 1, characterized in that, An elastic telescopic rod is provided between the movable part and the seat plate, with one end of the elastic telescopic rod slidably connected to the seat plate and the other end fixedly connected to the movable part.

3. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 1, characterized in that, The driving mechanism includes a driving cylinder mounted on the base plate, and a first rod and a second rod are coaxially and sequentially fixedly connected to the hydraulic rod of the driving cylinder. The movable part is provided with a slot for the second rod to slide.

4. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 3, characterized in that, The diameter of the second rod is smaller than that of the first rod, and the width of the slot is greater than the diameter of the second rod but less than the diameter of the first rod.

5. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 4, characterized in that, A second wedge block is fixedly connected to the movable part, and a third wedge block is fixedly connected to the second rod. During the process of the arm disengaging from the clamping position, the inclined surface of the third wedge block abuts against the wedge surface of the second wedge block to make the movable part move vertically relative to the seat plate.

6. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 1, characterized in that, The arm has several anti-slip steel patterns on its surface.

7. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 2, characterized in that, A slider is fixedly installed at one end of the elastic telescopic rod, and a guide groove is provided on the base plate for the slider to slide linearly.

8. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 1, characterized in that, The sawtooth angle of the first wedge block is adapted to the sawtooth angle of the one-way rack. When the first wedge block meshes with the one-way rack, the arm generates self-locking when subjected to the reverse force of the sheet pile.

9. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 1, characterized in that, The two clamping units are arranged symmetrically on the left and right sides when they are clamped, and the clamping center line of the two clamping arms coincides with the central axis of the steel sheet pile.

10. The static pressure-high frequency micro-vibration dual-mode pile driving equipment for sheet pile construction according to claim 1, characterized in that, A connecting rod is fixedly connected to the movable part, and the connecting rod and the extension rod are rotatably connected by a pivot.

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