PHC pipe pile tip

Abstract

This utility model discloses a PHC pipe pile tip, comprising a PHC pipe pile, a PHC pipe pile tip fixing plate fixed to the lower end face of the PHC pipe pile, a cross-shaped PHC pipe pile tip base plate mounted on the lower end face of the PHC pipe pile tip fixing plate via roller bearings, an upper toothed disc fixed at the middle position of the upper end face of the cross-shaped PHC pipe pile tip base plate, a hook ring located inside the PHC pipe pile above the upper toothed disc, and a cylindrical outer shell fixed to the lower end face of the hook ring. This utility model allows the pipe pile tip installed on the lower end face of the PHC pipe pile to rotate continuously, thereby causing relative movement of the soil around the bottom end of the PHC pipe pile during the sinking process of the PHC pipe pile. This reduces the friction and resistance of the soil on the PHC pipe pile, making it easier for the PHC pipe pile to be driven into the ground. Furthermore, the relative movement of the soil reduces the accumulation and compression of the soil around the driving position, thereby reducing the soil squeezing effect and minimizing the impact on subsequent PHC pipe pile installations.

Description

Technical Field

[0001] This utility model relates to the field of pipe pile technology, specifically a PHC pipe pile tip. Background Technology

[0002] PHC pipe pile is an abbreviation for "prestressed high-strength concrete pipe pile". It is a hollow cylindrical precast concrete component made by using the pre-tensioning prestressed centrifugal molding process and curing with 1.0MPa high-pressure steam at a temperature of about 180℃. Its standard segment length is 10 meters.

[0003] The PHC pipe pile tip is a component installed at the bottom of a prestressed high-strength concrete pipe pile (PHC pipe pile). It is used to guide the pipe pile to sink smoothly, protect the pile end, and enhance the bearing capacity of the pile to prevent external soil from entering the interior of the PHC pipe pile during the sinking process.

[0004] However, once the PHC pipe pile with the pipe pile tip fixed at the lower end is driven into the soil, it will compress the soil surface around the PHC pipe pile, which will hinder the subsequent installation of PHC pipe piles and ultimately affect the overall construction efficiency. Therefore, it does not meet the existing requirements, so we have proposed a PHC pipe pile tip. Utility Model Content

[0005] The purpose of this utility model is to provide a PHC pipe pile tip to solve the problems mentioned in the background art, such as the PHC pipe pile with a fixed pipe pile tip at the end face being driven into the soil and squeezing the soil surface around the PHC pipe pile, which will hinder the subsequent installation of PHC pipe piles and ultimately affect the overall construction efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PHC pipe pile tip, comprising a PHC pipe pile, a PHC pipe pile tip fixing plate fixed to the lower end face of the PHC pipe pile, a cross-shaped PHC pipe pile tip base plate mounted on the lower end face of the PHC pipe pile tip fixing plate via roller bearings, an upper gear plate fixed at the middle position of the upper end face of the cross-shaped PHC pipe pile tip base plate, a hook ring located inside the PHC pipe pile above the upper gear plate, a cylindrical shell fixed to the lower end face of the hook ring, a stepper motor fixedly installed on the lower side inside the cylindrical shell, the output shaft of the stepper motor connected to a transmission shaft via a coupling, and a lower gear plate meshing with the upper gear plate fixed to the lower end face of the transmission shaft.

[0007] Preferably, the top ends of the teeth located on the lower end face of the lower gear disk and the upper end face of the upper gear disk are both arc-shaped, and the positions of the teeth on the lower end face of the lower gear disk and the upper end face of the upper gear disk correspond to each other.

[0008] Preferably, a single-cylinder cylinder is fixedly installed inside the cylindrical housing above the stepper motor, and a remote control module is fixedly installed on one side of the outer surface of the single-cylinder cylinder.

[0009] Preferably, the piston rod of the single-cylinder is connected to a push plate, and below the push plate are multiple rectangular blocks that are slidably connected to the cylindrical outer shell. The multiple rectangular blocks are arranged in a ring, and the surface of the rectangular blocks facing the push plate is an inclined surface.

[0010] Preferably, the rectangular block contains a spring inside, and the surface of the spring facing the inner wall of the PHC pipe pile is connected to a convex plate that is slidably connected to the rectangular block. The surface of the convex plate facing the inner wall of the PHC pipe pile is equipped with multiple rollers, and the rollers are in contact with the inner wall of the PHC pipe pile.

[0011] Preferably, the rectangular block has multiple protective stripes on the surface facing the inner wall of the PHC pipe pile, and the surface of the rectangular block facing the PHC pipe pile is arc-shaped.

[0012] Preferably, a metal rod is fixed inside the cylindrical shell below the rectangular block, and a return spring is sleeved on the outer surface of the metal rod. One end of the return spring is connected to a return sleeve that is movably sleeved on the outer surface of the metal rod, and the upper end face of the return sleeve is fixed to the rectangular block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model involves fixing the PHC pipe pile tip fixing plate, which has a cross-shaped PHC pipe pile tip base plate installed on its lower end face, to the lower end face of the PHC pipe pile. Then, the cylindrical outer shell is directly placed inside the PHC pipe pile. As the cylindrical outer shell descends, the lower gear plate, connected to the stepper motor installed inside the cylindrical outer shell, will engage with the upper gear plate fixed to the upper end face of the cross-shaped PHC pipe pile tip base plate. Finally, the PHC pipe pile with the PHC pipe pile tip fixing plate and the cross-shaped PHC pipe pile tip base plate installed on its lower end face is driven into the soil. During the process, the stepper motor is started to drive the cross-shaped PHC pipe pile tip base plate, which is indirectly connected to it, to rotate. The rotating cross-shaped PHC pipe pile tip base plate enables the soil around the bottom end of the PHC pipe pile to move relative to each other during the sinking of the PHC pipe pile, thereby reducing the friction and resistance of the soil on the PHC pipe pile, making it easier for the PHC pipe pile to be driven into the ground. Furthermore, the relative movement of the soil can reduce the accumulation and compression of the soil around the driving position, thereby reducing the soil squeezing effect and reducing the impact on the subsequent installation of PHC pipe piles.

[0015] 2. This utility model uses a cylindrical outer shell with a stepper motor fixed inside, and a hook ring fixed on the upper end face. Before placing the cylindrical outer shell inside the PHC pipe pile, a hook from a crane is first hooked onto the hook ring. After the PHC pipe pile is driven to the corresponding depth, the cylindrical outer shell is directly removed by the crane for cement pouring. The stepper motor that drives the cross-shaped PHC pipe pile tip base to rotate can be reused through the above technical solution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view of the entire utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0019] Figure 4 This utility model Figure 2 Enlarged view of the structure at point B.

[0020] In the diagram: 1. PHC pipe pile; 2. PHC pipe pile tip fixing plate; 3. Cross-shaped PHC pipe pile tip base plate; 4. Cylindrical outer shell; 5. Stepper motor; 6. Transmission shaft; 7. Lower gear plate; 8. Upper gear plate; 9. Single-cylinder cylinder; 10. Push plate; 11. Rectangular block; 12. Inclined surface; 13. Convex plate; 14. Roller; 15. Spring; 16. Metal rod; 17. Return spring; 18. Return sleeve; 19. Hook ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] The PHC pipe pile 1 (model T6HdRWZ2), stepper motor 5 (model DM542), and return spring 17 (model JX110) mentioned in this utility model can be obtained from the market or through private customization.

[0023] Please see Figures 1 to 4This utility model provides an embodiment of a PHC pipe pile tip, including a PHC pipe pile 1. A PHC pipe pile tip fixing plate 2 is fixed to the lower end face of the PHC pipe pile 1. A cross-shaped PHC pipe pile tip base plate 3 is installed on the lower end face of the PHC pipe pile tip fixing plate 2 through a roller bearing. An upper toothed plate 8 is fixed at the middle position of the upper end face of the cross-shaped PHC pipe pile tip base plate 3. A hook ring 19 located inside the PHC pipe pile 1 is provided above the upper toothed plate 8. A cylindrical shell 4 is fixed to the lower end face of the hook ring 19. A stepper motor 5 is fixedly installed on the lower side inside the cylindrical shell 4. The output shaft of the stepper motor 5 is connected to a transmission shaft 6 through a coupling. A lower toothed plate 7 that meshes with the upper toothed plate 8 is fixed to the lower end face of the transmission shaft 6.

[0024] A single-cylinder cylinder 9 is fixedly installed inside the cylindrical housing 4 above the stepper motor 5. A remote control module is fixedly installed on one side of the outer surface of the single-cylinder cylinder 9. The piston rod of the single-cylinder cylinder 9 is connected to a push plate 10. Below the push plate 10, there are multiple rectangular blocks 11 that are slidably connected to the cylindrical housing 4. The multiple rectangular blocks 11 are arranged in a ring, and the surface of the rectangular blocks 11 facing the push plate 10 is an inclined surface 12. After the PHC pipe pile tip fixing plate 2 with the cross PHC pipe pile tip base plate 3 installed on the lower end is fixed to the lower end of the PHC pipe pile 1, the cylindrical housing 4 is directly placed into the interior of the PHC pipe pile 1. Then, the single-cylinder cylinder 9 is activated to push the push plate 10 connected to it downward. As the push plate 10 descends, it will contact the multiple inclined surfaces 12 located on the upper end of the multiple rectangular blocks 11. Under the action of the inclined surfaces 12, the multiple rectangular blocks 11 will be pushed outward synchronously as the push plate 10 descends.

[0025] The rectangular block 11 contains a spring 15 inside. The surface of the spring 15 facing the inner wall of the PHC pipe pile 1 is connected to a convex plate 13 that is slidably connected to the rectangular block 11. Multiple rollers 14 are installed on the surface of the convex plate 13 facing the inner wall of the PHC pipe pile 1, and the rollers 14 are in contact with the inner wall of the PHC pipe pile 1. As the rectangular block 11 moves, the rollers 14 located on the outer side of the rectangular block 11 will gradually approach the inner wall of the PHC pipe pile 1. When all the rollers 14 on the outer surface of the rectangular block 11 are in contact with the inner wall of the PHC pipe pile 1, the entire cylindrical shell 4 and the lower toothed disk 7 located in the middle of the lower end face of the cylindrical shell 4 can be positioned to the middle position inside the PHC pipe pile 1. The rollers 14 in contact with the inner wall of the PHC pipe pile 1 can prevent the entire cylindrical shell 4 from colliding with the inner wall of the PHC pipe pile 1 during the downward movement.

[0026] After the PHC pipe pile 1 and the cylindrical outer shell 4 are positioned at the middle position inside the PHC pipe pile 1, the single-cylinder cylinder 9 is closed. Then, under the action of gravity, the cylindrical outer shell 4 and the lower gear plate 7 will gradually penetrate deeper into the PHC pipe pile 1. As the lower gear plate 7 descends, it will mesh with the upper gear plate 8 fixed to the upper end face of the cross-shaped PHC pipe pile tip plate 3. After the two mesh with each other, the single-cylinder cylinder 9 continues to push the rectangular block 11 outward. Through the spring 15 located between the convex plate 13 and the rectangular block 11, when the roller 14 installed on the convex plate 13 is in contact with the inner wall of the PHC pipe pile 1, but the rectangular block 11 is still being pushed outward, the convex plate 13 and the roller 14 will remain in place, and the rectangular block 11 will gradually approach the inner wall of the PHC pipe pile 1. After the rectangular block 11 is attached to the inner wall of the PHC pipe pile 1, the cylindrical shell 4 can be fixed in the current position. After the cylindrical shell 4 is fixed in the current position, the stepper motor 5 is started to drive the lower toothed disk 7 connected to it through the transmission shaft 6 to rotate. When the lower toothed disk 7 rotates, the cross PHC pipe pile tip base plate 3 indirectly connected to it will rotate together. The rotating cross PHC pipe pile tip base plate 3 can make the soil around the bottom end of the PHC pipe pile 1 move relative to each other during the sinking of the PHC pipe pile 1, thereby reducing the friction and resistance of the soil on the PHC pipe pile 1, making it easier for the PHC pipe pile 1 to be driven into the ground. Moreover, the relative movement of the soil can reduce the accumulation and compression of the soil around the driving position, thereby reducing the soil squeezing effect and reducing the impact on the subsequent installation of the PHC pipe pile 1.

[0027] The above technical solution uses multiple rectangular blocks 11 that are driven synchronously outward by a single-cylinder cylinder 9 to enable the cylindrical shell 4 to be used in PHC pipe piles 1 of various sizes, thereby increasing the overall adaptability of the equipment.

[0028] The rectangular block 11 has multiple protective stripes on the surface facing the inner wall of the PHC pipe pile 1, and the surface facing the rectangular block 11 is arc-shaped. The anti-slip stripes can increase the friction between the rectangular block 11 and the inner wall of the PHC pipe pile 1, thereby preventing the cylindrical outer shell 4 from rotating due to the rotational force generated by the stepper motor 5 when the cross-shaped PHC pipe pile tip base 3 is driven to rotate by the stepper motor 5.

[0029] Below the rectangular block 11 is a metal rod 16 fixed inside the cylindrical shell 4. A return spring 17 is sleeved on the outer surface of the metal rod 16. One end of the return spring 17 is connected to a return sleeve 18 that is movably sleeved on the outer surface of the metal rod 16. The upper end face of the return sleeve 18 is fixed to the rectangular block 11. When the push plate 10 is pushed outward, the return sleeve 18 fixed to it will move outward together and squeeze the return spring 17.

[0030] Before placing the cylindrical outer shell 4 inside the PHC pipe pile 1, hook the hook on a crane onto the hook ring 19. When the cylindrical outer shell 4 moves downward inside the PHC pipe pile 1 due to gravity, the crane controls the descent speed of the cylindrical outer shell 4 to keep it moving downward at a speed of ten meters per second, thereby reducing the impact force received by the lower toothed disc 7 when it contacts the upper toothed disc 8.

[0031] After the PHC pipe pile 1 is driven to the corresponding depth, the push plate 10 is pulled upward by the single-cylinder cylinder 9. During the upward process, the push plate 10 is pulled inward by the reaction force of the compressed reset spring 17, thereby releasing the fixation of the cylindrical shell 4. After the fixation of the cylindrical shell 4 is released, the cylindrical shell 4 is directly taken out by the crane for cement pouring. The stepper motor 5 that drives the cross PHC pipe pile tip chassis 3 to rotate can be reused through the above technical solution.

[0032] The top ends of the teeth on the lower end face of the lower gear disk 7 and the upper end face of the upper gear disk 8 are both arc-shaped, and the positions of the teeth on the lower end face of the lower gear disk 7 and the upper end face of the upper gear disk 8 correspond to each other. With this structure, even if the top end of the upper tooth of the lower gear disk 7 moves downward and collides directly with the top end of the upper tooth of the upper gear disk 8, they will be offset by the push of the arc-shaped surface. The above technical solution can prevent the lower gear disk 7 and the upper gear disk 8 from failing to mesh with each other.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A PHC pipe pile tip, comprising a PHC pipe pile (1), characterized in that: The lower end face of the PHC pipe pile (1) is fixed with a PHC pipe pile tip fixing plate (2). The lower end face of the PHC pipe pile tip fixing plate (2) is mounted with a cross PHC pipe pile tip base plate (3) through roller bearings. An upper toothed plate (8) is fixed at the middle position of the upper end face of the cross PHC pipe pile tip base plate (3). A hook ring (19) located inside the PHC pipe pile (1) is provided above the upper toothed plate (8). A cylindrical shell (4) is fixed at the lower end face of the hook ring (19). A stepper motor (5) is fixedly installed on the lower side inside the cylindrical shell (4). The output shaft of the stepper motor (5) is connected to a transmission shaft (6) through a coupling. A lower toothed plate (7) that meshes with the upper toothed plate (8) is fixed at the lower end face of the transmission shaft (6).

2. The PHC pipe pile tip according to claim 1, characterized in that: The top ends of the teeth located on the lower end face of the lower toothed disk (7) and the upper end face of the upper toothed disk (8) are both arc-shaped, and the positions of the teeth on the lower end face of the lower toothed disk (7) and the upper end face of the upper toothed disk (8) correspond to each other.

3. The PHC pipe pile tip according to claim 1, characterized in that: Above the stepper motor (5) is a single-cylinder cylinder (9) fixedly installed inside the cylindrical shell (4), and a remote control module is fixedly installed on one side of the outer surface of the single-cylinder cylinder (9).

4. A PHC pipe pile tip according to claim 3, characterized in that: The piston rod of the single-cylinder cylinder (9) is connected to a push plate (10). Below the push plate (10) are multiple rectangular blocks (11) that are slidably connected to the cylindrical shell (4). The multiple rectangular blocks (11) are arranged in a ring, and the surface of the rectangular blocks (11) facing the push plate (10) is an inclined surface (12).

5. A PHC pipe pile tip according to claim 4, characterized in that: The rectangular block (11) contains a spring (15) inside. The surface of the spring (15) facing the inner wall of the PHC pipe pile (1) is connected to a convex plate (13) that is slidably connected to the rectangular block (11). The surface of the convex plate (13) facing the inner wall of the PHC pipe pile (1) is equipped with multiple rollers (14), and the rollers (14) are in contact with the inner wall of the PHC pipe pile (1).

6. A PHC pipe pile tip according to claim 5, characterized in that: The rectangular block (11) has multiple protective stripes on the surface facing the inner wall of the PHC pipe pile (1), and the surface of the rectangular block (11) facing the PHC pipe pile (1) is arc-shaped.

7. A PHC pipe pile tip according to claim 5, characterized in that: Below the rectangular block (11) is a metal rod (16) fixed inside the cylindrical shell (4). A return spring (17) is sleeved on the outer surface of the metal rod (16). One end of the return spring (17) is connected to a return sleeve (18) that is movably sleeved on the outer surface of the metal rod (16). The upper end face of the return sleeve (18) is fixed to the rectangular block (11).

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