A prestressed pipe pile hammering air leakage device

Abstract

This invention belongs to the field of construction equipment technology, specifically a device for preventing air leakage during the hammering of prestressed concrete pipe piles. It includes a ring and a fixing component. The outer diameter of the ring is smaller than the inner diameter of the pipe pile. The fixing component is used to fix the ring inside the pipe pile. An annular groove is provided on the bottom surface of the ring, and a moving block is slidably connected within the groove. When the ring is fixed inside the pipe pile, and the pile is hammered, gas inside the pile can be discharged through a pressure relief hole during the hammering process. After a certain number of hammerings, the moving component controls the moving block to move, aligning a clearing rod with the pressure relief hole. Then, the moving component can again control the clearing rod to move away from the moving block, allowing the rod to pass through the pressure relief hole to clear it and prevent blockage, thus assisting in air leakage.

Description

Technical Field

[0001] This invention belongs to the field of building construction equipment technology, specifically a device for preventing air leakage during the hammering of prestressed pipe piles. Background Technology

[0002] Prestressed concrete pipe piles are a type of reinforced concrete pile prefabricated in a factory using a pre-tensioning process. The core of its production is to tension the high-strength steel bars (prestressed tendons) before pouring the concrete, and then release the tension after the concrete hardens, so that the concrete of the pile body is in a pre-compression state before bearing the load. This process significantly improves the bending, tensile and impact resistance of the pipe pile, making it particularly suitable for pile driving processes such as hammer driving and static pressure driving.

[0003] Currently, when using the hammer-driven method to construct prestressed concrete pipe piles, the enormous energy of the pile hammer is transferred to the pipe pile through the pile cap, enabling it to overcome soil resistance and penetrate downwards. The open pipe pile will quickly occupy the space in the soil. If the soil is dense (such as cohesive soil) or the pile tip enters an impermeable layer, the soil may instantly form a "sealing plug" that blocks the lower opening of the pipe pile. At the same time, during hammering, the upper opening will also be blocked by the pile cap. As the pipe pile sinks, the air (or water) inside is drastically compressed, causing the air pressure (or water pressure) inside the pipe cavity to rise sharply. The huge internal air pressure will act like a "piston," generating circumferential tensile stress on the inner wall of the pipe pile. To eliminate the hazards, one or more additional pressure relief holes will be created at the top of the pipe pile to allow the compressed gas inside the pipe pile to be discharged in time, maintaining a basic balance of air pressure inside and outside the pipe pile, thereby eliminating the above-mentioned hazards.

[0004] When the pipe pile is hammered, it sinks and squeezes the soil, which raises a large amount of fine dust. Under the action of high-pressure airflow, this dust will be sprayed out from the pressure relief hole. However, if the dust is wet or the discharge is not smooth, some dust will be deposited and compacted in the hole or channel, eventually causing blockage and affecting the air release effect. Therefore, the present invention provides a device for air leakage when hammering prestressed pipe piles. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a device for preventing air leakage during hammering of prestressed pipe piles, comprising a ring and a fixing component. The outer diameter of the ring is smaller than the inner diameter of the pipe pile, and the fixing component is used to fix the ring inside the pipe pile. An annular groove is provided on the bottom surface of the ring, and a moving block is slidably connected in the annular groove. A moving component is provided on the ring to drive the moving block to move. A connecting rod is fixedly connected to the side wall of the moving block, and a moving groove is provided at the end of the connecting rod away from the moving block. A clearing rod is provided in the moving groove, and the moving component can be used to control the movement of the clearing rod.

[0007] Preferably, the movable component includes a first hollow groove formed in the inner ring, a magnetic block is slidably connected to the inner wall of the first hollow groove, the magnetic block is magnetically attracted to the movable block, a connecting plate is fixedly connected to the inner wall of the first hollow groove, and an air injection component for injecting air into the first hollow groove is provided in the inner ring.

[0008] Preferably, the air injection assembly includes a second hollow groove formed inside a ring, a set of circular holes communicating with the second hollow groove are formed on the top surface of the ring, a first hydraulic rod is fixedly connected to the top surface of the ring, a push plate is fixedly connected to the output end of the first hydraulic rod, the push plate is slidably connected to the inner wall of the second hollow groove, a through hole communicating with the first and second hollow grooves is formed inside the ring, and an elastic rope is fixedly connected between the connecting plate and the magnetic block.

[0009] Preferably, the inner wall of the ring is provided with a connecting pipe connected to a first hollow groove, a solenoid valve is provided inside the connecting pipe, a conduit is connected between the connecting pipe and the moving groove, and a first spring is fixedly connected between the end of the unblocking rod near the conduit and the inner wall of the moving groove.

[0010] Preferably, the fixing assembly includes a set of fixing plates fixed to the top surface of the ring, and a second hydraulic rod is fixedly connected to the fixing plates.

[0011] Preferably, a fixing block is fixedly connected to the output end of the second hydraulic rod. The fixing block has an opening on the side away from the second hydraulic rod. A drive wheel is provided inside the fixing block, and a motor for driving the drive wheel to rotate is provided on the outer wall of the fixing block.

[0012] Preferably, the outer wall of the fixing block is provided with a sliding groove, the motor is slidably connected to the sliding groove, the output end of the motor passes through the sliding groove and is fixedly connected to the drive wheel, a movable plate is provided inside the fixing block, an arc-shaped guide plate is fixedly connected to the side of the movable plate away from the second hydraulic rod, the drive wheel is rotatably connected to the guide plate, and a set of second springs is fixedly connected between the side of the guide plate away from the drive wheel and the inner wall of the fixing block.

[0013] Preferably, the fixing block has a cavity inside, and the inner wall of the fixing block has a circular groove communicating with the cavity. The moving plate is slidably connected to the inner wall of the fixing block in a sealed manner. The side of the fixing block away from the second hydraulic rod has a set of air outlets communicating with the cavity.

[0014] Preferably, an elastic block is fixedly connected to the outer wall of the unblocking rod, and the elastic block has a hollow structure inside.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. In this invention, a ring is fixed inside the pipe pile. When the pipe pile is hammered using a hammering method, the gas inside the pipe pile can be discharged from the pressure relief hole during the hammering process. After a certain number of hammerings, the moving block is moved by the moving component to align the unblocking rod with the pressure relief hole. At this time, the unblocking rod can be moved away from the moving block by the moving component again so that the unblocking rod passes through the pressure relief hole to unblock the pressure relief hole and prevent the pressure relief hole from being blocked, which would affect the gas release effect, thus achieving the function of assisting in gas release.

[0017] 2. This invention activates the second hydraulic rod, causing its output end to push the fixed block, which in turn causes the drive wheel to press against the inner wall of the pipe pile. The drive wheel is rotated by a motor, allowing the ring to move inside the pipe pile. This serves two purposes: firstly, it facilitates moving the unblocking rod to the same position as the pressure relief hole; secondly, it facilitates moving the ring out of the pipe pile for subsequent use. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the air leakage device in this invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the ring in this invention;

[0021] Figure 3 yes Figure 2 Enlarged view of point A;

[0022] Figure 4 yes Figure 2 Enlarged view of point B;

[0023] Figure 5 This is a schematic diagram of the structure of the fixing component in this invention;

[0024] Figure 6 yes Figure 5 Another perspective structural diagram;

[0025] Figure 7 This is a schematic diagram of the internal structure of the fixing block in this invention;

[0026] Figure 8 This is a partial structural cross-sectional view of the connecting rod and the unblocking rod in this invention.

[0027] In the diagram: 1. Ring; 2. Annular groove; 3. Moving block; 4. Connecting rod; 5. Moving groove; 6. Unblocking rod; 7. First hollow groove; 8. Magnetic block; 9. Connecting plate; 10. Second hollow groove; 11. Through hole; 12. Push plate; 13. First hydraulic rod; 14. Elastic rope; 15. Connecting pipe; 16. Guide pipe; 17. Circular hole; 18. Fixing plate; 19. Second hydraulic rod; 20. Fixing block; 21. Drive wheel; 22. Motor; 23. Slide groove; 24. Guide plate; 25. Moving plate; 26. Circular groove; 27. Cavity; 28. Air outlet; 29. ​​Elastic block. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0029] Example 1: As Figures 1 to 7 As shown in the embodiment of the present invention, a device for preventing air leakage during hammering of prestressed pipe piles includes a ring 1 and a fixing component. The outer diameter of the ring 1 is smaller than the inner diameter of the pipe pile. The fixing component is used to fix the ring 1 inside the pipe pile. An annular groove 2 is provided on the bottom surface of the ring 1. A moving block 3 is slidably connected in the annular groove 2. A moving component is provided on the ring 1 to drive the moving block 3 to move. A connecting rod 4 is fixedly connected to the side wall of the moving block 3. A moving groove 5 is provided at the end of the connecting rod 4 away from the moving block 3. A clearing rod 6 is provided in the moving groove 5. The moving component can be used to control the movement of the clearing rod 6.

[0030] This application involves lowering a ring 1 from the top opening of the pipe pile into the pipe pile until the unblocking rod 6 is positioned at the pre-reserved pressure relief hole of the pipe pile. There are generally one or more pressure relief holes, all at the same height. Then, a fixing component is used to fix the ring 1 inside the pipe pile. When the pipe pile is hammered, the gas inside the pipe pile can be discharged from the pressure relief hole during the hammering process. After a certain number of hammerings, the moving component controls the moving block 3 to move so that the unblocking rod 6 is aligned with the pressure relief hole. At this time, the moving component can be used again to control the unblocking rod 6 to move it away from the moving block 3, so that the unblocking rod 6 passes through the pressure relief hole to unblock the pressure relief hole and prevent the pressure relief hole from being blocked, which would affect the gas release effect. After unblocking, the moving component controls the unblocking rod 6 to reset.

[0031] The movable component includes a first hollow groove 7 formed in the inner ring 1. A magnetic block 8 is slidably connected to the inner wall of the first hollow groove 7. The magnetic block 8 is magnetically attracted to the movable block 3. A connecting plate 9 is fixedly connected to the inner wall of the first hollow groove 7. An air injection component for injecting air into the first hollow groove 7 is provided in the inner ring 1. When the movable block 3 needs to be moved, gas can be injected into the hollow groove by means of the air injection component. At this time, the gas will push the magnetic block 8 to move in the first hollow groove 7. The magnetic block 8 will drive the movable block 3 to move so that the unblocking rod 6 is aligned with the pressure relief hole.

[0032] The air injection assembly includes a second hollow groove 10 formed inside a ring 1. A set of circular holes 17 communicating with the second hollow groove 10 are formed on the top surface of the ring 1. A first hydraulic rod 13 is fixedly connected to the top surface of the ring 1. A push plate 12 is fixedly connected to the output end of the first hydraulic rod 13. The push plate 12 is slidably connected to the inner wall of the second hollow groove 10. A through hole 11 communicating with the first hollow groove 7 and the second hollow groove 10 is formed inside the ring 1. An elastic rope 14 is fixedly connected between the connecting plate 9 and the magnetic block 8.

[0033] When the movable block 3 needs to be moved, the output end of the first hydraulic rod 13 can push the push plate 12, causing the push plate 12 to push the gas in the second hollow groove 10 into the first hollow groove 7 through the through hole 11. At this time, the gas can push the magnetic block 8 to move away from the connecting plate 9, thereby causing the magnetic block 8 to drive the movable block 3 to move. By controlling the push plate 12 to move through the first hydraulic rod 13, the gas in the first hollow groove 7 will be drawn back into the second hollow groove 10, and the magnetic block 8 will be attracted to move closer to the connecting plate 9. When one side of plate 9 moves, elastic rope 14 is used to pull magnetic block 8 to assist in the movement. The above mechanism can control the movement of moving block 3 so that the unblocking rod 6 can be aligned with all the pressure relief holes to facilitate the unblocking of pressure. The outer wall of ring 1 has an exhaust hole (not shown in the figure) that communicates with connecting plate 9 near the connecting plate 9. The exhaust hole is located on the side of connecting plate 9 away from elastic rope 14. When magnetic block 8 moves, the gas in the first hollow groove 7 on the side of magnetic block 8 away from elastic rope 14 can be discharged from the exhaust hole.

[0034] The inner wall of the ring 1 is provided with a connecting pipe 15 connected to the first hollow groove 7. A solenoid valve is provided in the connecting pipe 15. A conduit 16 connects the connecting pipe 15 and the moving groove 5. A first spring is fixedly connected between the end of the unblocking rod 6 near the conduit 16 and the inner wall of the moving groove 5. When the unblocking rod 6 needs to be moved, the solenoid valve can be opened. At this time, the gas in the second hollow groove 10 can be pushed into the first hollow groove 7 by the push plate 12. The gas will first enter the connecting pipe 15 and then enter the moving groove 5 through the conduit 16, so that the gas pushes the unblocking rod 6 to move. When the push plate 12 moves upward, the first spring will pull the unblocking rod 6 to reset. At this time, the gas in the moving groove 5 will flow back into the first hollow groove 7.

[0035] The fixing assembly includes a set of fixing plates 18 fixed to the top surface of the ring 1, and a second hydraulic rod 19 is fixedly connected to the fixing plate 18. After the ring 1 is placed inside the pipe pile, the second hydraulic rod 19 can be activated so that the output end of the second hydraulic rod 19 is firmly pressed against the inner wall of the pipe pile, thereby fixing the ring 1 inside the pipe pile for subsequent use of the unblocking rod 6.

[0036] The output end of the second hydraulic rod 19 is fixedly connected to a fixing block 20. The fixing block 20 has an opening on the side away from the second hydraulic rod 19. A drive wheel 21 is provided inside the fixing block 20, and a motor 22 for driving the drive wheel 21 to rotate is provided on the outer wall of the fixing block 20. After the ring 1 is placed inside the pipe pile, the second hydraulic rod 19 can be activated to push the fixing block 20 with the output end of the second hydraulic rod 19, so that the drive wheel 21 abuts against the inner wall of the pipe pile. The motor 22 controls the drive wheel 21 to rotate, thereby allowing the ring 1 to move inside the pipe pile. This is to facilitate the movement of the unblocking rod 6 to the same position as the pressure relief hole, and also to facilitate the movement of the ring 1 out of the pipe pile for subsequent use.

[0037] The outer wall of the fixing block 20 is provided with a sliding groove 23. The motor 22 is slidably connected to the sliding groove 23. The output end of the motor 22 passes through the sliding groove 23 and is fixedly connected to the drive wheel 21. A movable plate 25 is provided inside the fixing block 20. An arc-shaped guide plate 24 is fixedly connected to the side of the movable plate 25 away from the second hydraulic rod 19. The drive wheel 21 is rotatably connected to the guide plate 24. A set of second springs is fixedly connected between the side of the guide plate 24 away from the drive wheel 21 and the inner wall of the fixing block 20. After the drive wheel 21 controls the ring 1 to move to a suitable position, the second hydraulic rod 19 can continue to push the fixing block 20. At this time, the drive wheel 21 will be pressed against the inner wall of the pipe pile. During the scraping process of the continuous movement of the fixing block 20, the fixing block 20 will fit against the inner wall of the pipe pile. At this time, the friction between the fixing block 20 and the pipe pile can be increased by using the fixing block 20, thereby improving the fixing effect on the ring 1.

[0038] The fixed block 20 has a cavity 27 inside, and the inner wall of the fixed block 20 has a circular groove 26 communicating with the cavity 27. The moving plate 25 is slidably connected to the inner wall of the fixed block 20. The fixed block 20 has a set of air outlets 28 communicating with the cavity 27 on the side away from the second hydraulic rod 19. When the fixed block 20 is pushed to contact the inner wall of the pipe pile, the moving plate 25 will move inside the fixed block 20. At this time, the moving plate 25 will push the gas in the fixed block 20 from the circular groove 26 into the cavity 27. Then the gas will be sprayed out from the air outlets 28 onto the inner wall of the pipe pile to blow away impurities on the inner wall of the pipe pile. Then the fixed block 20 will fit against the inner wall of the pipe pile.

[0039] Example 2: Figure 8 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: an elastic block 29 is fixedly connected to the outer wall of the unblocking rod 6, and the elastic block 29 has a hollow structure inside; since different pipe piles require different diameters of the pressure relief holes, when the unblocking rod 6 enters the pressure relief hole, the elastic block 29 will fit tightly against the inner wall of the pressure relief hole, thereby completely pushing out the impurities in the pressure relief hole, so as to improve the unblocking effect of the pressure relief hole. The elastic block 29 can be deformed to adapt to pressure relief holes of different diameters for use.

[0040] Working principle: The ring 1 is lowered into the pipe pile from the top opening until the unblocking rod 6 is positioned at the pre-reserved pressure relief hole. There are usually one or more pressure relief holes at the same height. Then, a fixing component is used to secure the ring 1 inside the pipe pile. When the pipe pile is hammered, gas inside the pile can be released through the pressure relief hole. After a certain number of hammer blows, the moving component controls the moving block 3 to move, aligning the unblocking rod 6 with the pressure relief hole. At this point, it can be used again... The unblocking rod 6 is moved away from the moving block 3 by the moving component, so that the unblocking rod 6 passes through the pressure relief hole to unblock the pressure relief hole and prevent the pressure relief hole from being blocked, which would affect the air release effect. After unblocking, the unblocking rod 6 is reset by the moving component. When the moving block 3 needs to be moved, gas can be injected into the hollow groove by the air injection component. At this time, the gas will push the magnetic block 8 to move in the first hollow groove 7. At this time, the magnetic block 8 will drive the moving block 3 to move so that the unblocking rod 6 is aligned with the pressure relief hole.

[0041] When the moving block 3 needs to be moved, the output end of the first hydraulic rod 13 can push the push plate 12, causing the push plate 12 to push the gas in the second hollow groove 10 into the first hollow groove 7 through the through hole 11. At this time, the gas can push the magnetic block 8 to move away from the connecting plate 9, thereby causing the magnetic block 8 to drive the moving block 3 to move. By controlling the push plate 12 to move through the first hydraulic rod 13, the gas in the first hollow groove 7 will be sucked back into the second hollow groove 10. At this time, the magnetic block 8 will be attracted to move towards the connecting plate 9. The elastic rope 14 is used to pull the magnetic block 8 to assist in the movement. Through the above mechanism, the moving block 3 can be moved so that the unblocking rod 6 can be aligned with all the pressure relief holes, which is convenient for unblocking the pressure relief. The outer wall of the magnetic block 8 has an exhaust hole (not shown in the figure) near the connecting plate 9, which communicates with the connecting plate 9. The exhaust hole is located on the side of the connecting plate 9 away from the elastic rope 14. When the magnetic block 8 moves, the gas in the first hollow groove 7 located on the side of the magnetic block 8 away from the elastic rope 14 can be discharged from the exhaust hole. When the unblocking rod 6 needs to be moved, the solenoid valve can be opened. At this time, the gas in the second hollow groove 10 can be pushed into the first hollow groove 7 by the push plate 12. The gas will first enter the connecting pipe 15, and then enter the moving groove 5 through the conduit 16, so that the gas pushes the unblocking rod 6 to move. When the push plate 12 moves upward, the first spring will pull the unblocking rod 6 to reset. At this time, the gas in the moving groove 5 will flow back into the first hollow groove 7.

[0042] After the ring 1 is placed inside the pipe pile, the second hydraulic rod 19 can be activated, causing its output end to firmly press against the inner wall of the pipe pile, thereby fixing the ring 1 inside the pipe pile for subsequent use of the unblocking rod 6. In this application, after the ring 1 is placed inside the pipe pile, the second hydraulic rod 19 can be activated, causing its output end to push the fixing block 20, making the drive wheel 21 press against the inner wall of the pipe pile. The motor 22 controls the drive wheel 21 to rotate, thus moving the ring 1 inside the pipe pile. One purpose is to facilitate the movement of the unblocking rod 6 to the same position as the pressure relief hole, and the other is to facilitate the movement of the ring 1 out of the pipe pile for subsequent use. After the drive wheel 21 controls the ring 1 to move to the appropriate position, the second hydraulic rod 19 can continue to push the fixing block 20. At this time, the drive wheel 21 will be pressed against the inner wall of the pipe pile. During the scraping process of the fixing block 20, the fixing block 20 will adhere to and press against the inner wall of the pipe pile. At this time, the friction between the fixing block 20 and the pipe pile can be increased by using the fixing block 20, thereby improving the fixing effect of the ring 1.

[0043] When the fixed block 20 is pushed to contact the inner wall of the pipe pile, the moving plate 25 will move inside the fixed block 20. At this time, the moving plate 25 will push the gas inside the fixed block 20 from the circular groove 26 into the cavity 27. Then the gas will be sprayed out from the air outlet 28 onto the inner wall of the pipe pile to blow away the impurities on the inner wall of the pipe pile. Then the fixed block 20 will stick to the inner wall of the pipe pile.

[0044] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0045] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing air leakage during hammering of prestressed pipe piles, comprising a ring (1) and a fixing assembly, wherein the outer diameter of the ring (1) is smaller than the inner diameter of the pipe pile, and the fixing assembly is used to fix the ring (1) inside the pipe pile; Its features are: The bottom surface of the ring (1) is provided with an annular groove (2), and a moving block (3) is slidably connected in the annular groove (2). The ring (1) is provided with a moving component that drives the moving block (3) to move. The moving block (3) is fixedly connected to a connecting rod (4) on its side wall. A moving groove (5) is provided at one end of the connecting rod (4) away from the moving block (3). A dredging rod (6) is provided in the moving groove (5). The moving component can be used to control the dredging rod (6) to move. The moving component includes a first hollow groove (7) formed in the inner ring (1), a magnetic block (8) is slidably connected to the inner wall of the first hollow groove (7), the magnetic block (8) is magnetically attracted to the moving block (3), a connecting plate (9) is fixedly connected to the inner wall of the first hollow groove (7), and an air injection component for injecting air into the first hollow groove (7) is provided in the inner ring (1).

2. The air leakage device for prestressed pipe pile hammering according to claim 1, characterized in that: The air injection assembly includes a second hollow groove (10) opened in a ring (1). The top surface of the ring (1) is provided with a set of circular holes (17) communicating with the second hollow groove (10). A first hydraulic rod (13) is fixedly connected to the top surface of the ring (1). A push plate (12) is fixedly connected to the output end of the first hydraulic rod (13). The push plate (12) is slidably connected to the inner wall of the second hollow groove (10). A through hole (11) communicating with the first hollow groove (7) and the second hollow groove (10) is opened in the ring (1). An elastic rope (14) is fixedly connected between the connecting plate (9) and the magnetic block (8).

3. The air leakage device for prestressed pipe pile hammering according to claim 2, characterized in that: The inner wall of the ring (1) is provided with a connecting pipe (15) connected to the first hollow groove (7). A solenoid valve is provided inside the connecting pipe (15). A conduit (16) is connected between the connecting pipe (15) and the moving groove (5). A first spring is fixedly connected between the end of the unblocking rod (6) near the conduit (16) and the inner wall of the moving groove (5).

4. The air leakage device for prestressed pipe pile hammering according to claim 1, characterized in that: The fixing assembly includes a set of fixing plates (18) fixed to the top surface of the ring (1), and a second hydraulic rod (19) is fixedly connected to the fixing plates (18).

5. A device for preventing air leakage during hammering of prestressed pipe piles according to claim 4, characterized in that: The output end of the second hydraulic rod (19) is fixedly connected to a fixing block (20). The fixing block (20) has an opening on the side away from the second hydraulic rod (19). A drive wheel (21) is provided inside the fixing block (20), and a motor (22) for driving the drive wheel (21) to rotate is provided on the outer wall of the fixing block (20).

6. A device for preventing air leakage during hammering of prestressed pipe piles according to claim 5, characterized in that: The outer wall of the fixed block (20) is provided with a sliding groove (23). The motor (22) is slidably connected to the sliding groove (23). The output end of the motor (22) passes through the sliding groove (23) and is fixedly connected to the drive wheel (21). A movable plate (25) is provided inside the fixed block (20). An arc-shaped guide plate (24) is fixedly connected to the side of the movable plate (25) away from the second hydraulic rod (19). The drive wheel (21) is rotatably connected to the guide plate (24). A set of second springs is fixedly connected between the side of the guide plate (24) away from the drive wheel (21) and the inner wall of the fixed block (20).

7. A device for preventing air leakage during hammering of prestressed pipe piles according to claim 6, characterized in that: The fixed block (20) has a cavity (27) inside, and the inner wall of the fixed block (20) has a circular groove (26) communicating with the cavity (27). The moving plate (25) is slidably connected to the inner wall of the fixed block (20). The fixed block (20) has a set of air outlets (28) communicating with the cavity (27) on the side away from the second hydraulic rod (19).

8. A device for preventing air leakage during hammering of prestressed pipe piles according to claim 1, characterized in that: An elastic block (29) is fixedly connected to the outer wall of the unblocking rod (6), and the elastic block (29) has a hollow structure inside.

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