A concrete cast-in-place pile vibrating device

Abstract

The application discloses a concrete pouring pile vibrating device and relates to the technical field of building, in particular to the concrete pouring pile vibrating device. The concrete pouring pile vibrating device specifically comprises a motor, a hose, a flexible shaft and a vibrating head. The vibrating head comprises an outer shell. A rolling cone assembly is arranged in the outer shell. The rolling cone assembly comprises a rolling track connected with the outer shell and a rolling cone body located in the inner cavity of the rolling track. The outer side wall of the rolling cone body is uniformly provided with an oil storage groove. The top end of the rolling track is uniformly provided with an oil return flow channel. The outer shell is uniformly provided with a flow guide groove. The application has the lubricating oil return cooling function. The magnetic attraction force between the eccentric block and the piston is used to make the piston reciprocate, realize the active pumping of the lubricating oil, guarantee the continuous lubrication between the rolling cone body and the rolling track, and simultaneously, the oil pumping amount changes adaptively with the speed load. When the high load and high speed are achieved, the oil pumping amount is increased, the higher lubrication demand is matched. When the low load and low speed are achieved, the oil pumping amount is reduced, the lubrication redundancy is avoided, and the use effect of the device is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of building technology, specifically to a vibratory compaction device for cast-in-place concrete piles. Background Technology

[0002] Cast-in-place concrete piles are core load-bearing components in building pile foundations, bridge foundations, and municipal underground engineering. The density and uniformity of the concrete in the pile body directly determine the bearing capacity, impermeability, and overall service life of the pile foundation. During the construction of cast-in-place piles, concrete vibration is a key process to eliminate defects such as air bubbles, voids, and honeycomb pitting inside the pile body, ensuring the quality of concrete pouring.

[0003] In existing technologies, immersion-type planetary roller vibrators are typically used to vibrate concrete in pile foundations. These devices rely on the centrifugal force generated by the high-speed rotation of the rollers to contact the inner wall of the raceway, generating high-frequency vibration through friction transmission to achieve concrete compaction. However, in practical engineering applications, especially in the construction of deep, high-grade concrete piles, the contact surface between the rollers and the raceway is continuously subjected to high pressure and high-frequency relative friction during high-speed operation. This significantly reduces the stability of the lubricating oil film on the contact surface, making it prone to rupture and lubrication failure, thus losing its protective function. After the oil film fails, the metal surfaces of the rollers and raceway directly and rigidly contact each other, leading to adhesive wear, surface scratches, abrasions, and even seizing failures. This causes rapid wear and deformation of the core vibration components, reducing the vibration accuracy and operational stability of the equipment, and also accelerates the deterioration and consumption of the lubricating grease, significantly shortening the equipment lubrication and maintenance cycle and increasing construction and maintenance costs.

[0004] Furthermore, the planetary roller cone structure relies on the positive pressure generated by centrifugal force to form a frictional transmission torque. Its force transmission capacity is limited by the rotational speed and eccentric structure, and it has an inherent load limit. When the concrete in the deep part of the pile body has high viscosity and large wrapping resistance, the damping resistance torque generated on the vibrator exceeds the frictional transmission limit, which easily leads to roller cone slippage and free rotation. This causes the actual output vibration frequency of the vibrating device to deviate from the design nominal value, and the excitation energy to decay. Ultimately, this results in the concrete not being compacted properly, making it difficult to ensure the uniform forming quality of the cast-in-place pile body.

[0005] Based on this, this application proposes a vibratory compaction device for cast-in-place concrete piles. Summary of the Invention

[0006] This invention provides a concrete pile vibration device that solves the problems mentioned in the background art, such as the easy failure of the oil film of the planetary roller friction pair and the degradation of vibration performance under high damping conditions.

[0007] This invention provides the following technical solution: a concrete cast-in-place pile vibration device, comprising a motor, a hose, a flexible shaft, and a vibrating head. The vibrating head includes an outer shell, within which a roller cone assembly is disposed. The roller cone assembly includes a raceway connected to the outer shell and a roller cone body located within the raceway cavity. Oil storage grooves are uniformly arranged on the outer side wall of the roller cone body. A return oil channel is uniformly arranged at the top of the raceway. Guide grooves are uniformly arranged on the outer shell, with the inlet end of the guide groove communicating with the bottom end of the inner cavity of the outer shell. A lubricating oil pool is disposed at the bottom end of the inner cavity of the outer shell. The inlet end of the guide channel is located below the oil surface in the oil tank, and the outlet end of the guide channel is connected to the inlet end of the return oil channel through the side hole. When the roller cone body rotates along the inner wall of the raceway, the lubricating oil at the bottom of the inner cavity of the outer shell enters the return oil channel through the guide channel and the side hole. The lubricating oil in the return oil channel is discharged from its outlet end to the inner wall of the raceway and slides down along the inner wall of the raceway to supply the friction position between the roller cone body and the raceway, forming a lubricating oil circulation lubrication. During the circulation of the lubricating oil, heat exchange is carried out through the outer shell to achieve cooling. The cooled lubricating oil cools the friction position between the roller cone body and the raceway.

[0008] Preferably, the inner diameter of the upper end of the guide channel is larger than the inner diameter of its lower end, and the upper and lower ends of the guide channel are smoothly transitioned by a conical surface.

[0009] Preferably, a piston is movably connected to the upper inner cavity of the guide channel, and the piston is connected to the outer shell through a second spring.

[0010] Preferably, the roller cone assembly is connected to the flexible shaft via an eccentric assembly. The eccentric assembly includes a connecting rod connected to the roller cone body. The connecting rod and the top of the raceway are in a clearance fit. A balance block is connected to the top of the connecting rod. A groove is provided on one side of the balance block. An eccentric block is movably connected in the groove. The eccentric block is connected to the balance block via a first spring.

[0011] Preferably, the oil storage tank is arranged at an angle along the generatrix of the roller cone, and its angle is adapted to the rotation direction of the roller cone.

[0012] Preferably, the inner wall of the groove is provided with a self-lubricating structure; and when the first spring is in the initial state, the center of gravity of the balance block is on the same straight line as the rotation axis of the roller body.

[0013] Preferably, the eccentric block is located on the side of the roller cone body near the raceway, and a first positioning block is provided at both the top and bottom of the eccentric block. The inner wall of the groove is provided with a positioning groove adapted to the first positioning block. The distance between the first positioning block and the outer wall of the eccentric block is not greater than the distance between the balance block and the outer shell, and the eccentric block and the piston are in a magnetically attracted state.

[0014] Preferably, the inlet end of the guide channel is provided with a debris filter screen.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This concrete pile vibration device automatically adjusts the contact pressure between the roller cone body and the inner wall of the raceway through an eccentric component. When the concrete wrapping resistance increases and the device load increases, the centrifugal force increases synchronously with the rotation speed fluctuation. The eccentric block can move outward and drive the roller cone body to further press the inner raceway, automatically increasing the upper limit of the friction transmission torque and preventing the roller cone body from slipping and spinning freely. Moreover, the greater the load, the greater the pressing force, forming an adaptive load matching, ensuring that the vibration device can still stably output the nominal vibration frequency under high damping conditions, thus ensuring the compaction effect of the concrete pile.

[0016] 2. This concrete pile vibrating device has a lubricating oil return cooling function. Utilizing the magnetic attraction between the eccentric block and the piston, the piston reciprocates, achieving active pumping of lubricating oil. This ensures continuous lubrication between the roller cone body and the raceway. Simultaneously, the pumping oil volume adapts to the speed and load. Under high load and high speed, the pumping oil volume increases to meet higher lubrication requirements; under low load and low speed, the pumping oil volume decreases to avoid lubrication redundancy and ensure the device's effectiveness. Furthermore, during the return process, the lubricating oil exchanges heat with the surrounding environment through the outer shell. The cooled lubricating oil returns to the friction parts, achieving cooling of the friction parts and ensuring the effectiveness of this application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a concrete pile vibration device proposed in this invention; Figure 2 This is a partial cross-sectional schematic diagram of the vibration head of the present invention; Figure 3 The structure of this invention Figure 2 Diagram showing the view from below; Figure 4 The structure of this invention Figure 2 Enlarged diagram of A in the middle; Figure 5 The structure of this invention Figure 2 Cross-sectional diagram; Figure 6 This is a schematic diagram showing the connection between the conical roller body and the eccentric component of the present invention; Figure 7 This is a cross-sectional schematic diagram of the eccentric component of the present invention.

[0018] In the diagram: 1. Motor; 2. Hose; 3. Vibrating head; 4. Raceway; 5. Balance block; 6. Flexible shaft; 7. Cone roller body; 8. Middle housing; 9. Oil return channel; 10. Eccentric block; 11. Connecting rod; 12. Oil reservoir; 13. First spring; 14. Guide channel; 15. Debris filter screen; 16. Side hole; 17. Piston; 18. Second spring; 19. Connecting housing; 20. Upper housing; 21. First positioning block; 22. Second positioning block; 23. Lower housing. Detailed Implementation

[0019] 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.

[0020] This invention provides one embodiment: Please refer to Figures 1-7 A concrete pile vibration device includes a motor 1, a flexible hose 2, a flexible shaft 6, and a vibrating head 3. The output end of the motor is connected to one end of the flexible shaft 6, and the other end of the flexible shaft 6 passes through the inside of the flexible hose 2 and extends into the inside of the vibrating head 3. The vibrating head 3 includes an outer shell, which is an assembled shell. The outer shell includes an upper shell 20, a middle shell 8, and a lower shell 23. The bottom of the middle shell 8 is connected to the lower shell 23 by means of threaded connection or other means. The top of the middle shell 8 is fixedly connected to a connecting shell 19, and the top of the connecting shell 19 is connected to the upper shell 20 by means of threaded connection or other means. The upper shell 20, the middle shell 8, the connecting shell 19, and the lower shell 23 together constitute the outer shell of the vibrating head 3. The outer shell is detachably connected to the end of the flexible hose 2.

[0021] The middle shell 8 is uniformly provided with guide grooves 14 along its circumference. The bottom end of the guide grooves 14 is connected to the inner cavity of the outer shell. When the connecting shell 19 is connected to the middle shell, the top of the guide grooves 14 is sealed by the connecting shell 19. The bottom surface of the connecting shell 19 is provided with second springs 18 corresponding to the positions of each guide groove 14. The upper end of the second spring 18 is fixed to the bottom surface of the connecting shell 19, and the lower end of the second spring 18 is fixedly connected to the piston 17. When the connecting shell 19 is connected to the middle shell, the piston 17 is located in the inner cavity of the upper end of the guide groove 14. The piston 17 is movably connected to the inner cavity of the upper end of the guide groove 14, and a sealing ring is provided on the outer side wall of the piston 17. The sealing ring is used to ensure the sealing between the piston 17 and the guide groove 14. The material of the sealing ring can be set according to the requirements. Furthermore, the lower inner diameter of the guide channel 14 is smaller than its upper inner diameter. The upper large diameter section and the lower small diameter section of the guide channel 14 are smoothly transitioned by a conical surface. The conical surface is used to limit the piston 17, restricting the maximum displacement of the piston 17 moving downward within the guide channel 14.

[0022] A lubricating oil sump is located at the bottom of the inner cavity of the outer casing. The inlet end of the guide channel 14 is below the oil surface in the sump, and a debris filter screen 15 is installed at the inlet end of the guide channel 14. A roller cone assembly is located above the lubricating oil sump. The roller cone assembly is connected to the output end of the flexible shaft 6 via an eccentric assembly. The roller cone assembly includes a raceway 4 connected to the outer casing and a roller cone body 7 located within the inner cavity of the raceway 4. Figure 3 and Figure 5 As shown, the raceway 4 is detachably connected to the middle shell 8. The top of the raceway 4 is evenly provided with oil return channels 9. The guide groove 14 is provided with a side hole 16 on the side near the raceway 4, and the bottom of the raceway 4 is provided with a positioning groove. The inner wall of the middle shell 8 is provided with a second positioning block 22 at the corresponding position. The second positioning block 22 is adapted to the positioning groove. The positioning of the raceway 4 is achieved by using the second positioning block 22 and the positioning groove, so that after the raceway 4 is connected to the middle shell 8, the liquid inlet end of the oil return channel 9 is connected to the guide groove 14 through the side hole 16.

[0023] In use, the motor 1 outputs power to drive the flexible shaft 6 to rotate at high speed. The flexible shaft 6 drives the eccentric assembly and the roller assembly to rotate synchronously. Under the action of centrifugal force, the outer wall of the roller body 7 always rolls against the inner wall of the raceway 4. Relying on the eccentric excitation force and rolling friction, a stable high-frequency excitation is formed, causing the vibrator head to vibrate continuously at high frequency. When the vibrator head is inserted into the concrete of the cast-in-place pile, high-frequency vibration can expel air bubbles in the concrete and compact the pores of the concrete, thus completing the concrete vibration operation of the cast-in-place pile. Furthermore, the motor 1, hose 2, and flexible shaft 6 are all existing common components, and this application does not modify their structure. The motor 1 is used to provide rotational power, the hose 2 is used to protect the flexible shaft 6 and prevent bending and wear, and the flexible shaft 6 is used for long-distance power transmission.

[0024] Oil reservoirs 12 are evenly distributed on the outer wall of the cone body 7. These reservoirs store lubricating grease, continuously lubricating the contact area between the raceway and the cone body during operation. This effectively reduces component wear, lowers operating noise, ensures stable vibration operation, and extends the service life of the vibrating head. Furthermore, the oil reservoirs 12 are arranged at an angle along the generatrix of the cone, their angle matching the cone's rotation direction. When the cone body 7 rotates eccentrically at high speed, the angled oil reservoirs, adapting to the rotation direction, utilize centrifugal force to continuously scrape and compress the lubricating grease along the generatrix to the entire friction contact surface between the cone and the raceway. This avoids the problem of grease remaining only in the reservoirs and failing to cover the friction pair, achieving uniform lubrication across the entire cone surface. It also prevents the lubricating oil from being directly thrown out of the friction pair area during high-speed rotation, effectively retaining the lubricating medium, reducing wear between the cone body 7 and the raceway 4, and extending the service life of the cone assembly.

[0025] Furthermore, during the rotation of the cone roller body 7, the rotational speeds at both ends of the cone roller body 7 are inconsistent, resulting in a pressure difference between the two ends of the cone roller body 7. Under the action of the pressure difference, the lubricating oil in the oil sump can pass through the debris filter screen 15 and enter the guide groove 14 under the drive of external force. The lubricating oil in the guide groove 14 can enter the return oil channel 9 through the side hole 16. The lubricating oil in the return oil channel 9 can be discharged to the inner wall of the raceway 4 through its outlet end and slide down along the inner wall of the raceway 4, continuously supplying the friction pair position between the cone roller body 7 and the raceway 4, realizing continuous circulation lubrication between the two. In addition, during the lubricating oil return process, heat exchange with the surrounding environment is achieved through the outer shell. The cooled lubricating oil returns to the contact part between the cone roller body 7 and the raceway 4, which can achieve cooling of the friction part.

[0026] The eccentric assembly includes a connecting rod 11 connected to the cone body 7. The connecting rod 11 is in a clearance fit with the top of the raceway 4. A balance block 5 is connected to the top of the connecting rod 11. The balance block 5 is located above the raceway 4. A groove is provided on one side of the balance block 5. An eccentric block 10 is movably connected in the groove. The inner wall of the groove is provided with a self-lubricating structure, such as a self-lubricating bushing. The self-lubricating bushing reduces the friction between the eccentric block 10 and the groove, thereby improving the response speed of the eccentric assembly. The eccentric block 10 is connected to the balance block 5 through a first spring 13. When the first spring 13 is in its initial state, the center of gravity of the balance block 5 is on the same straight line as the rotation axis of the cone body 7, ensuring the balance of the eccentric assembly and the cone assembly.

[0027] The eccentric block 10 is located on the side of the cone body 7 closest to the raceway 4. When the cone assembly slips and spins freely, the motor speed is increased, and the centrifugal force on the eccentric block 10 increases accordingly. When the centrifugal force exceeds the tension of the first spring 13, the eccentric block 10 slides outward radially, increasing the overall eccentricity and eccentric excitation force, and driving the cone body 7 to further press against the raceway, increasing the squeezing force and friction of the cone body 7 against the raceway 4, effectively improving and eliminating the slippage problem, and ensuring the effectiveness of this application. Furthermore, the eccentric block 10 is positioned on the side of the cone body 7 closest to the raceway 4, so that the direction of the centrifugal force generated by the rotation of the eccentric block 10 is consistent with the pressing direction of the centrifugal force of the cone body 7 itself. The radial pressing forces of the two can be superimposed, jointly increasing the normal pressure of the cone body 7 against the inner wall of the raceway 4, further improving the contact surface friction, and strengthening the effect of suppressing slippage.

[0028] The eccentric block 10 has a first positioning block 21 at both its top and bottom. The inner wall of the groove has a positioning groove adapted to the first positioning block 21. The distance between the first positioning block 21 and the outer wall of the eccentric block 10 is no greater than the distance between the balance block 5 and the outer shell. The first positioning block 21 limits the movement of the eccentric block 10, preventing it from detaching from the groove. Furthermore, when the eccentric block 10 reaches its maximum stroke, it is in a clearance fit with the inner wall of the outer shell, preventing it from impacting the outer shell and improving the safety of the eccentric assembly.

[0029] Piston 17 and eccentric block 10 are in a state of magnetic attraction. In this embodiment, a metal sheet is provided on the top of piston 17, and the sheet is in a state of clearance fit with guide groove 14. The eccentric block 10 is made of permanent magnet. When eccentric block 10 approaches piston 17, under the action of magnetic attraction between the two, piston 17 moves upward. When piston 17 moves upward, it can generate suction negative pressure on guide groove 14, so that lubricating oil in oil sump enters guide groove 14 through debris filter screen 15. When eccentric block 10 moves away from piston 17, the magnetic attraction between the two gradually weakens until it disappears. Under the action of the rebound force of second spring 18, second spring 18 pushes piston 17 downward until piston 17 returns to its original position. During the downward movement of piston 17, the lubricating oil below it can be squeezed, so that the lubricating oil above side hole 16 can be squeezed into oil return channel 9, realizing the return of lubricating oil.

[0030] In summary: When using this concrete pile vibration device, the motor 1 outputs power to drive the flexible shaft 6 to rotate at high speed. The flexible shaft 6 drives the eccentric component and the roller cone component to rotate synchronously. Under the action of centrifugal force, the outer wall of the roller cone body 7 always rolls in contact with the inner wall of the raceway 4. Relying on the eccentric excitation force and rolling friction, a stable high-frequency excitation is formed, causing the vibrator head to vibrate continuously at high frequency. When the vibrator head is inserted into the concrete of the pile, high-frequency vibration can expel air bubbles in the concrete and compact the concrete pores, thus completing the concrete vibration operation of the pile.

[0031] During the rotation of the cone body 7, the lubricating oil in the oil reservoir 12 flows along the generatrix of the cone body 7 and moves to the friction area between the cone body 7 and the raceway 4, achieving uniform lubrication across the entire cone surface. Furthermore, when the eccentric block 10 approaches the piston 17, under the magnetic attraction between the eccentric block 10 and the piston 17, the piston 17 moves upward. When the piston 17 moves upward, it can generate a suction negative pressure on the guide groove 14, allowing the lubricating oil in the oil sump to enter the guide groove 14 through the debris filter screen 15. When the eccentric block 10 moves away from the piston 17, the magnetic attraction between the two gradually weakens until it disappears. Under the action of the rebound force of the second spring 18, the second spring 18 pushes the piston 17 downward until the piston 17 returns to its original position. During the downward movement of the piston 17, the lubricating oil below it can be squeezed, so that the lubricating oil above the side hole 16 can be squeezed into the return oil channel 9, realizing the return of the lubricating oil. During the return of the lubricating oil, heat is exchanged between the outer shell and the surrounding environment, achieving cooling. The cooled lubricating oil returns to the friction part between the roller cone body 7 and the raceway 4, achieving cooling of the friction part between the roller cone body 7 and the raceway 4.

[0032] When the roller cone assembly slips and spins freely, the motor speed is increased, and the centrifugal force on the eccentric block 10 increases accordingly. When the centrifugal force is greater than the tension of the first spring 13, the eccentric block 10 slides outward radially, increasing the overall eccentricity and eccentric excitation force, and driving the roller cone body 7 to further press against the raceway, increasing the squeezing force and friction of the roller cone body 7 on the raceway 4, effectively improving and eliminating the slippage problem, and ensuring the effectiveness of this application. Furthermore, the eccentric block 10 is positioned on the side of the roller cone body 7 closest to the raceway 4, so that the direction of the centrifugal force generated by the rotation of the eccentric block 10 is consistent with the pressing direction of the centrifugal force of the roller cone body 7 itself. The radial pressing forces of the two can be superimposed to increase the normal pressure of the roller cone body 7 on the inner wall of the raceway 4, further enhancing the contact surface friction and strengthening the anti-slip effect. In this process, the distance between the eccentric block 10 and the piston 17 decreases, and the magnetic attraction between the two increases, which in turn increases the stroke of the piston 17 and the displacement of the piston 17, ultimately increasing the pump oil volume, which can meet higher lubrication requirements and ensure the effectiveness of the device.

Claims

1. A concrete pile vibration device, comprising a motor (1), a flexible hose (2), a flexible shaft (6), and a vibrating head (3), characterized in that: The vibrating head includes an outer shell, inside which a roller cone assembly is disposed. The roller cone assembly includes a raceway (4) connected to the outer shell and a roller cone body (7) located in the inner cavity of the raceway (4). Oil storage grooves (12) are uniformly disposed on the outer side wall of the roller cone body (7). A return oil channel (9) is uniformly disposed at the top of the raceway (4). A guide groove (14) is uniformly disposed on the outer shell. The inlet end of the guide groove (14) is connected to the bottom end of the inner cavity of the outer shell, and a lubricating oil pool is disposed at the bottom end of the inner cavity of the outer shell. The inlet end of the guide groove (14) is located below the oil surface of the oil pool. The outlet end of the guide groove (14) is located below the oil surface of the oil pool. The liquid end is connected to the liquid inlet end of the return oil channel (9) through the side hole (16); when the roller cone body (7) rotates along the inner wall of the raceway, the lubricating oil at the bottom of the inner cavity of the outer shell enters the return oil channel (9) through the guide groove (14) and the side hole (16). The lubricating oil in the return oil channel (9) is discharged from its liquid outlet end to the inner wall of the raceway (4) and slides down along the inner wall of the raceway (4) to supply the friction position between the roller cone body (7) and the raceway (4), forming a lubricating oil circulation lubrication. During the circulation of the lubricating oil, heat exchange is carried out through the outer shell to achieve cooling. The cooled lubricating oil cools the friction position between the roller cone body (7) and the raceway (4).

2. The concrete pile vibration device according to claim 1, characterized in that: The inner diameter of the upper end of the guide groove (14) is larger than the inner diameter of its lower end, and the upper end and the lower end of the guide groove (14) are smoothly transitioned by a conical surface.

3. The concrete pile vibration device according to claim 2, characterized in that: A piston (17) is movably connected to the upper inner cavity of the guide groove (14), and the piston (17) is connected to the outer shell through a second spring (18).

4. A concrete pile vibration device according to claim 3, characterized in that: The roller cone assembly is connected to the flexible shaft (6) via an eccentric assembly. The eccentric assembly includes a connecting rod (11) connected to the roller cone body (7). The connecting rod (11) and the top of the raceway (4) are in a clearance fit state. A balance block (5) is connected to the top of the connecting rod (11). A groove is provided on one side of the balance block (5). An eccentric block (10) is movably connected in the groove. The eccentric block (10) is connected to the balance block (5) via a first spring (13).

5. A concrete pile vibration device according to claim 1, characterized in that: The oil storage tank (12) is arranged at an inclination along the generatrix of the roller cone, and its inclination direction is adapted to the rotation direction of the roller cone.

6. A concrete pile vibration device according to claim 4, characterized in that: The inner wall of the groove is provided with a self-lubricating structure; and when the first spring (13) is in the initial state, the center of gravity of the balance block (5) is on the same straight line as the rotation axis of the roller body (7).

7. A concrete pile vibration device according to claim 4, characterized in that: The eccentric block (10) is located on the side of the roller cone body (7) near the raceway (4). The top and bottom of the eccentric block (10) are provided with first positioning blocks (21). The inner wall of the groove is provided with positioning grooves that are adapted to the first positioning blocks (21). The distance between the first positioning block (21) and the outer wall of the eccentric block (10) is not greater than the distance between the balance block (5) and the outer shell. The eccentric block (10) and the piston (17) are in a state of magnetic attraction.

8. A concrete pile vibration device according to claim 1, characterized in that: The inlet end of the guide channel (14) is provided with a debris filter screen (15).

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