A pile body expanding device
By using a support frame and a hydraulic cylinder-driven expansion device, combined with sensor monitoring and adjustment rod adjustment, the problems of complex, inefficient, and costly existing pile expansion technology and equipment have been solved, achieving efficient and low-cost pile expansion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 广东品建基础工程有限公司
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-09
AI Technical Summary
Existing pile diameter expansion technologies suffer from problems such as complex equipment, low construction efficiency, and high cost. Mechanical expansion has a limited range, while hydraulic expansion equipment is complex and expensive, making it difficult to meet the needs of large-diameter pile foundations.
The expansion device, driven by a support frame and hydraulic cylinder, uses a reciprocating motor to rotate the screw, causing the moving seat to move along the screw axis, which in turn drives the expansion blades to slide and expand the diameter. Pressure and displacement during the expansion process are monitored by pressure and infrared sensors. Combined with the adjusting rod and connecting seat, the expansion blades can be flexibly adjusted to meet different expansion requirements.
It achieves pile diameter expansion with simple structure, high construction efficiency and low cost, ensures the stability and safety of the diameter expansion process, extends the service life of the diameter expansion blade, and reduces construction costs.
Smart Images
Figure CN224333246U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pile foundation construction technology, and in particular to a pile diameter expansion device. Background Technology
[0002] Pile foundation construction is a crucial step in building engineering, and its quality directly affects the stability and safety of the building. With the increase in high-rise buildings and long-span bridges, higher requirements are placed on the bearing capacity and stability of pile foundations. In recent years, pile diameter expansion technology has gradually gained attention, improving the bearing capacity and stability of pile foundations by increasing the pile diameter.
[0003] Currently, common pile diameter expansion technologies mainly include two methods: mechanical expansion and hydraulic expansion. Mechanical expansion typically uses an expanding drill bit or expander to enlarge the bottom of the pile through rotation or impact. However, the expansion range of mechanical expansion is limited and cannot meet the needs of large-diameter pile foundations. Hydraulic expansion uses a hydraulic cylinder to push the expander, which unfolds inside the pile to achieve diameter expansion. Although hydraulic expansion has a large expansion range, the equipment is complex, the cost is high, and the construction efficiency is low. Therefore, existing expansion technologies suffer from problems such as complex equipment, low construction efficiency, and high cost, which limit their widespread application.
[0004] Therefore, this application provides a pile diameter expansion device. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a pile diameter expansion device that overcomes these deficiencies. Currently, common pile diameter expansion technologies mainly include mechanical and hydraulic methods. Mechanical expansion typically uses an expanding drill bit or expander to enlarge the bottom of the pile through rotation or impact. However, the expansion range of mechanical expansion is limited, making it difficult to meet the needs of large-diameter pile foundations. Hydraulic expansion utilizes a hydraulic cylinder to push the expander, causing it to unfold inside the pile, thus achieving diameter expansion. While hydraulic expansion offers a large expansion range, the equipment is complex, costly, and has low construction efficiency. Therefore, existing diameter expansion technologies suffer from problems such as complex equipment, low construction efficiency, and high cost, limiting their widespread application.
[0006] To achieve the above objectives, this application provides the following technical solution: a pile diameter expansion device, comprising a support frame, a top plate fixedly installed at the top of the support frame, two sets of hydraulic cylinders fixedly installed at the bottom of the top plate, a horizontal plate fixedly installed at the telescopic ends of the two sets of hydraulic cylinders, a diameter expansion mechanism provided at the bottom of the horizontal plate, the diameter expansion mechanism comprising a reciprocating motor, the reciprocating motor being installed at the top of the horizontal plate, a screw fixedly installed through the horizontal plate at the output end of the reciprocating motor, an impact head rotatably connected to the bottom end of the screw, a movable seat threadedly connected to the outer surface of the screw, two sets of diameter expansion blades slidably connected to the bottom of the horizontal plate, and an adjusting rod hinged between the diameter expansion blades and the movable seat.
[0007] By adopting the above technical solution, two sets of hydraulic cylinders reciprocate and extend to drive the expansion mechanism into the pile body. During operation, the reciprocating motor drives the screw to rotate, causing the moving seat to move downward along the axial direction of the screw. Since the expansion blade is slidably connected to the horizontal plate, when the moving seat moves downward, it drives the adjusting rod to rotate and push the expansion blade to slide along the bottom of the horizontal plate. The two sets of expansion blades move away from each other, expanding the diameter of the pile body. The distance between the two sets of expansion blades can be adjusted by adjusting the position of the moving seat on the screw, adapting to different expansion requirements. This device has a simple structure, high construction efficiency, and reduces construction costs.
[0008] As a preferred technical solution of this application, pressure sensors are fixedly installed on the opposite surfaces of the two sets of expanding blades, and infrared sensors are fixedly installed on both sides of the movable seat.
[0009] By adopting the above technical solution, the pressure of the two sets of expansion blades on the contact surface with the pile body is monitored in real time by two sets of pressure sensors, and the displacement of the two sets of expansion blades is monitored in real time by two sets of infrared sensors, which helps to ensure the stability and safety of the expansion process.
[0010] As a preferred technical solution of this application, a connecting seat 1 is fixedly installed on both sides of the movable seat, and a connecting seat 2 is fixedly installed on the opposite surfaces of the two sets of expanding blades. The two ends of the adjusting rod are respectively hinged to the corresponding connecting seat 1 and connecting seat 2.
[0011] By adopting the above technical solution, the two ends of the adjusting rod are hinged to connecting seat one and connecting seat two, so that the adjusting rod can rotate flexibly with the movement of the moving seat, thereby accurately pushing the expanding blade to slide along the bottom of the horizontal plate. This is beneficial for the adjusting rod to adapt to different angle changes during the movement.
[0012] As a preferred technical solution of this application, a controller is fixedly installed on the outer surface of the support frame, and a digital display screen is electrically connected to the top of the controller.
[0013] By adopting the above technical solution, the controller receives information monitored in real time by the pressure sensor and infrared sensor, and displays the data received by the controller on the digital display screen. This allows operators to intuitively understand the pressure and displacement during the expansion process of the expansion blade, which is conducive to timely adjustments.
[0014] As a preferred technical solution of this application, the top ends of the two sets of expanding blades are fixedly installed with sliders, and the bottom of the horizontal plate is provided with two sets of sliding grooves that match the two sets of sliders. The two sets of sliders are slidably connected to the corresponding sliding grooves.
[0015] By adopting the above technical solution, the expanding blade moves and drives the slider to slide along the groove, which improves the guiding performance of the expanding blade and improves the expanding quality.
[0016] As a preferred technical solution of this application, the inside of the horizontal plate is provided with two sets of guide grooves, and guide blocks are slidably connected to both sets of guide grooves. The bottom end of the guide block is fixedly installed with the top end of the slider located directly below it.
[0017] By adopting the above technical solution, the guide block is fixed to the top of the slider, providing additional support for the slider. When the slider moves, the guide block slides in the guide groove, which effectively improves the stability of the expanding blade during movement.
[0018] As a preferred technical solution of this application, a base is fixedly installed at the bottom end of the support frame, and a weighted seat is fixedly installed at the bottom end of the base.
[0019] By adopting the above technical solution, the base and weight-bearing seat increase the overall footprint and weight of the device, effectively improving its load-bearing capacity and stability.
[0020] As a preferred technical solution of this application, wear-resistant layers are fixedly connected to the sides of the two sets of expanding blades that are far apart, motor brackets are fixedly installed on both sides of the reciprocating motor, the bottom end of the motor bracket is fixedly installed on the top end of the support frame, and a bearing is installed at the connection between the screw and the cross plate.
[0021] By adopting the above technical solutions, the wear-resistant layer can reduce the wear between the expanding blade and the pile body during the expansion process, extend the service life of the expanding blade, reduce construction costs, and provide stable support for the reciprocating motor through the motor bracket, while the bearing improves the smoothness of the screw rotation.
[0022] The beneficial effects of this application are:
[0023] 1. Two sets of hydraulic cylinders reciprocate to extend and drive the expansion mechanism into the pile body. During operation, a reciprocating motor drives the screw to rotate, causing the moving seat to move downward along the axial direction of the screw. Since the expansion blade is slidably connected to the horizontal plate, when the moving seat moves downward, it drives the adjusting rod to rotate and push the expansion blade to slide along the bottom of the horizontal plate. The two sets of expansion blades move away from each other, expanding the diameter of the pile body. The distance between the two sets of expansion blades can be adjusted by adjusting the position of the moving seat on the screw, adapting to different expansion requirements. This device has a simple structure, high construction efficiency, and reduces construction costs.
[0024] 2. By using two sets of pressure sensors to monitor the pressure of the two sets of expanding blades on the contact surface with the pile body in real time during the expansion process, and by using two sets of infrared sensors to monitor the displacement of the two sets of expanding blades in real time during the expansion process, it is beneficial to ensure the stability and safety of the expansion process. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of this application;
[0026] Figure 2 This is a schematic diagram of the diameter expansion mechanism;
[0027] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;
[0028] Figure 4 This is a schematic diagram of the internal structure of the horizontal plate.
[0029] In the diagram: 1. Support frame; 2. Top plate; 3. Hydraulic cylinder; 4. Horizontal plate; 5. Expansion mechanism; 501. Reciprocating motor; 502. Screw; 503. Impact head; 504. Moving seat; 505. Connecting seat one; 506. Expansion blade; 507. Connecting seat two; 508. Adjusting rod; 6. Pressure sensor; 7. Infrared sensor; 8. Controller; 9. Digital display screen; 10. Slider; 11. Slide groove; 12. Guide groove; 13. Guide block; 14. Base; 15. Weight seat; 16. Wear-resistant layer; 17. Motor bracket; 18. Bearing. Detailed Implementation
[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0031] Reference Figure 1-4A pile diameter expansion device includes a support frame 1, a top plate 2 fixedly installed at the top of the support frame 1, two sets of hydraulic cylinders 3 fixedly installed at the bottom of the top plate 2, a horizontal plate 4 fixedly installed at the telescopic ends of the two sets of hydraulic cylinders 3, and a diameter expansion mechanism 5 provided at the bottom of the horizontal plate 4. The diameter expansion mechanism 5 includes a reciprocating motor 501, which is installed at the top of the horizontal plate 4. A screw 502 is fixedly installed through the horizontal plate 4 at the output end of the reciprocating motor 501, and the bottom end of the screw 502 is rotatably connected to... The device has an impact head 503, a movable seat 504 threadedly connected to the outer surface of the screw 502, two sets of expanding blades 506 slidably connected to the bottom of the cross plate 4, and an adjusting rod 508 hinged between the expanding blades 506 and the movable seat 504; a connecting seat 1 505 is fixedly installed on both sides of the movable seat 504, and a connecting seat 2 507 is fixedly installed on the opposite surfaces of the two sets of expanding blades 506; the two ends of the adjusting rod 508 are respectively hinged to the corresponding connecting seat 1 505 and connecting seat 2 507.
[0032] Two sets of hydraulic cylinders 3 reciprocate to extend, driving the expansion mechanism 5 into the pile body. During operation, the reciprocating motor 501 drives the screw 502 to rotate, causing the moving seat 504 to move downward along the axial direction of the screw 502. Since the expansion blade 506 is slidably connected to the horizontal plate 4, when the moving seat 504 moves downward, it drives the adjusting rod 508 to rotate, pushing the expansion blade 506 to slide along the bottom of the horizontal plate 4. The two sets of expansion blades 506 move away from each other, expanding the diameter of the pile body. The movement of the moving seat 504 is adjusted relative to the screw 502. The distance between the two sets of expanding blades 506 can be adjusted at different positions to adapt to different expanding requirements. This device has a simple structure, high construction efficiency, and reduces construction costs. By hinged to the two ends of the adjusting rod 508 with the connecting seat 1 505 and the connecting seat 2 507, the adjusting rod 508 can rotate flexibly with the movement of the moving seat 504, thereby accurately pushing the expanding blade 506 to slide along the bottom of the horizontal plate 4. This is beneficial for the adjusting rod 508 to adapt to different angle changes during the movement.
[0033] Reference Figure 1-3 Pressure sensors 6 are fixedly installed on the opposite surfaces of the two sets of expanding blades 506, and infrared sensors 7 are fixedly installed on both sides of the moving base 504; a controller 8 is fixedly installed on the outer surface of the support frame 1, and a digital display screen 9 is electrically connected to the top of the controller 8.
[0034] Two sets of pressure sensors 6 monitor the pressure of the two sets of expansion blades 506 on the contact surface with the pile body in real time during the expansion process, and two sets of infrared sensors 7 monitor the displacement of the two sets of expansion blades 506 in real time during the expansion process, which helps to ensure the stability and safety of the expansion process. The controller 8 receives the information monitored in real time by the pressure sensors 6 and infrared sensors 7, and displays the data received by the controller 8 on the digital display screen 9, which makes it easy for operators to intuitively understand the pressure and displacement of the expansion blades 506 during the expansion process, and facilitates timely adjustments.
[0035] Reference Figure 1-2 , Figure 4 The top of each of the two sets of expanding blades 506 is fixedly equipped with a slider 10. The bottom of the horizontal plate 4 is provided with two sets of sliding grooves 11 that match the two sets of sliders 10. The two sets of sliders 10 are slidably connected to the corresponding sliding grooves 11. The bottom of the support frame 1 is fixedly equipped with a base 14, and the bottom of the base 14 is fixedly equipped with a weight 15. When the expanding blades 506 move, they drive the sliders 10 to slide along the sliding grooves 11, which improves the guiding performance of the expanding blades 506 and improves the expanding quality. The base 14 and the weight 15 increase the floor space and weight of the entire device, which effectively improves the load-bearing capacity and stability of the device.
[0036] Reference Figure 1-2 , Figure 4 The horizontal plate 4 has two sets of guide grooves 12 inside, and guide blocks 13 are slidably connected to both sets of guide grooves 12. The bottom end of the guide block 13 is fixedly installed to the top end of the slider 10 located directly below it. Wear-resistant layers 16 are fixedly connected to the opposite sides of the two sets of expansion blades 506. Motor brackets 17 are fixedly installed on both sides of the reciprocating motor 501. The bottom end of the motor bracket 17 is fixedly installed to the top end of the support frame 1. A bearing 18 is installed at the connection between the screw 502 and the horizontal plate 4. The guide blocks 13 are fixed to the top end of the slider 10, providing additional support for the slider 10. When the slider 10 moves, the guide blocks 13 slide in the guide grooves 12, effectively improving the stability of the expansion blades 506 when they move. The wear-resistant layer 16 can reduce the wear between the expansion blades 506 and the pile body during the expansion process, extend the service life of the expansion blades 506, and reduce construction costs. The motor brackets 17 provide stable support for the reciprocating motor 501, and the bearings 18 improve the smoothness of the screw 502 when it rotates.
[0037] Working principle: Two sets of hydraulic cylinders 3 reciprocate and extend, driving the expansion mechanism 5 into the pile body. During operation, the reciprocating motor 501 drives the screw 502 to rotate, causing the moving seat 504 to move downward along the axial direction of the screw 502. Since the expansion blade 506 is slidably connected to the horizontal plate 4, when the moving seat 504 moves downward, it drives the adjusting rod 508 to rotate, pushing the expansion blade 506 to slide along the bottom of the horizontal plate 4. The two sets of expansion blades 506 move away from each other, expanding the diameter of the pile body. The distance between the two sets of expansion blades 506 can be adjusted by adjusting the different positions of the moving seat 504 on the screw 502 to adapt to different expansion requirements. Two sets of pressure sensors 6 monitor the pressure of the two sets of expansion blades 506 on the contact surface with the pile body in real time during the expansion process, and two sets of infrared sensors 7 monitor the displacement of the two sets of expansion blades 506 in real time during the expansion process.
[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A pile diameter expansion device, comprising a support frame (1), characterized in that, A top plate (2) is fixedly installed at the top of the support frame (1). Two sets of hydraulic cylinders (3) are fixedly installed at the bottom of the top plate (2). A horizontal plate (4) is fixedly installed at the telescopic ends of the two sets of hydraulic cylinders (3). A diameter expansion mechanism (5) is provided at the bottom of the horizontal plate (4). The diameter expansion mechanism (5) includes a reciprocating motor (501). The reciprocating motor (501) is installed at the top of the horizontal plate (4). A screw (502) is fixedly installed through the horizontal plate (4) at the output end of the reciprocating motor (501). An impact head (503) is rotatably connected to the bottom end of the screw (502). A movable seat (504) is threadedly connected to the outer surface of the screw (502). Two sets of diameter expansion blades (506) are slidably connected to the bottom of the horizontal plate (4). An adjusting rod (508) is hinged between the diameter expansion blades (506) and the movable seat (504).
2. The pile diameter expansion device according to claim 1, characterized in that, Pressure sensors (6) are fixedly installed on the opposite surfaces of the two sets of expansion blades (506), and infrared sensors (7) are fixedly installed on both sides of the movable seat (504).
3. The pile diameter expansion device according to claim 1, characterized in that, Connecting seat one (505) is fixedly installed on both sides of the movable seat (504), and connecting seat two (507) is fixedly installed on the opposite surfaces of the two sets of expanding blades (506). The two ends of the adjusting rod (508) are respectively hinged to the corresponding connecting seat one (505) and connecting seat two (507).
4. A pile diameter expansion device according to claim 1, characterized in that, The outer surface of the support frame (1) is fixedly mounted with a controller (8), and the top of the controller (8) is electrically connected to a digital display screen (9).
5. A pile diameter expansion device according to claim 1, characterized in that, The top of each of the two sets of expansion blades (506) is fixedly equipped with a slider (10), and the bottom of the horizontal plate (4) is provided with two sets of sliding grooves (11) that match the two sets of sliders (10). The two sets of sliders (10) are slidably connected to the corresponding sliding grooves (11).
6. A pile diameter expansion device according to claim 5, characterized in that, The inside of the horizontal plate (4) is provided with two sets of guide grooves (12), and guide blocks (13) are slidably connected to both sets of guide grooves (12). The bottom end of the guide block (13) is fixedly installed to the top end of the slider (10) located directly below it.
7. A pile diameter expansion device according to claim 1, characterized in that, The support frame (1) has a base (14) fixedly installed at its bottom end, and a weighted seat (15) is fixedly installed at the bottom end of the base (14).
8. A pile diameter expansion device according to claim 1, characterized in that, Wear-resistant layers (16) are fixedly connected to the two sets of expansion blades (506) on opposite sides. Motor brackets (17) are fixedly installed on both sides of the reciprocating motor (501). The bottom end of the motor bracket (17) is fixedly installed on the top end of the support frame (1). A bearing (18) is installed at the connection between the screw (502) and the cross plate (4).