A long auger pile-forming machine
The combination of guide bearings and buffer components solves the vibration problem of drill rods in hard foundations, ensuring hole quality and extending the service life of guide bearings. At the same time, the cleaning brush prevents soil debris from entering, achieving a safe and efficient drilling process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIHUI CONSTR GRP
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-23
AI Technical Summary
When the drill bit and drill rod drill into a hard foundation, the drill rod is prone to lateral vibration exceeding the preset range, which leads to a reduction in hole quality.
The system employs a combination structure of guide bearings and buffer components. The inner ring of the guide bearing matches the drill rod and limits its movement when the drill rod vibrates. The buffer component absorbs vibration energy and restricts the swing range of the drill rod. At the same time, a cleaning brush is installed to prevent soil and debris from entering the guide bearing.
It effectively limits the vibration range of the drill rod, ensures the quality of hole formation, reduces the wear of the guide bearing, extends its service life, and prevents soil and debris from entering the guide bearing and affecting its function.
Smart Images
Figure CN224396434U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pile foundation construction technology, and in particular to a long spiral drilling rig for pile forming. Background Technology
[0002] Currently, long spiral drilling rigs are commonly used for pile foundation construction. In related technologies, long spiral drilling rigs mainly include the machine body, drilling tower, winch, rope, power head, drill rod, drill bit, and top drive mechanism. The drilling tower is set vertically on the machine body, and the power head is slidably set on the drilling tower vertically. The power head moves up and down through the cooperation of the winch and rope. The drill rod rotates and passes through the power head. The top drive mechanism is set on the power head to drive the drill rod to rotate, and the drill bit is connected to the lower end of the drill rod. During drilling, the power head is driven downward along the drilling tower by the cooperation of a winch and rope. The top drive mechanism on the power head drives the drill rod and drill bit to rotate and drill. During the drilling process, soil and debris are discharged along the spiral cutterhead on the drill rod and drill bit. After drilling is completed, the power head and drill rod are lifted a certain distance along the drilling tower. Then, concrete slurry is pumped into the drill rod. Under the gravity of the concrete slurry, the sealing gate on the drill bit is opened, allowing the concrete slurry to flow into the hole. Then, the power head and drill rod are slowly lifted to complete the pile grouting.
[0003] Regarding the aforementioned technologies, when the drill bit and drill rod drill into a hard foundation, the drill rod is prone to lateral vibration exceeding the preset range, resulting in a reduction in hole quality. Utility Model Content
[0004] To help limit the swing range of the drill rod and ensure the quality of the hole, this application provides a long auger drilling machine for pile drilling.
[0005] The technical solution of the long spiral drilling rig for pile driving provided in this application is as follows:
[0006] A long spiral drilling rig for pile driving includes:
[0007] The fuselage itself;
[0008] A drilling rig, which is mounted on the main body of the machine;
[0009] A support is provided on the drilling rig and located below the power head on the drilling rig;
[0010] A guide bearing is provided, wherein the outer ring of the guide bearing is mounted on a support, and the drill rod on the power head is located in the inner ring of the guide bearing. The difference between the inner diameter of the inner ring of the guide bearing and the outer diameter of the spiral cutterhead on the drill rod is less than 3 mm.
[0011] A buffer element is disposed between the outer ring of the guide bearing and the support, and is used to buffer the lateral movement of the guide bearing.
[0012] Preferably, mounting rings are provided on both the upper and lower sides of the outer ring of the guide bearing, and an annular groove is provided on the support to cooperate with the mounting ring, the diameter of the annular groove being larger than the outer diameter of the mounting ring.
[0013] Preferably, the buffer element includes an elastic buffer layer disposed between the outer ring of the guide bearing and the support.
[0014] Preferably, cleaning brushes are slidably arranged on opposite sides of the support, and the sliding direction of the two cleaning brushes is perpendicular to the axial direction of the guide bearing. An adjustment component is provided on the support, which is used to drive the cleaning brushes to move toward or away from the center of the guide bearing.
[0015] Preferably, the adjusting assembly includes a sliding block, a connecting rod, and a driving member. The sliding block is slidably mounted on the support and aligned with the middle position of the two cleaning brushes. The sliding direction of the sliding block is perpendicular to the arrangement direction of the two cleaning brushes. The connecting rod corresponds one-to-one with the cleaning brush. One end of the connecting rod is hinged to the corresponding cleaning brush, and the other end is hinged to the sliding block. The hinge axis of the connecting rod is parallel to the axis of the guide bearing. The driving member is used to drive the sliding block to slide.
[0016] Preferably, the driving component includes a cylinder mounted on a support, and the sliding block is connected to the piston rod of the cylinder.
[0017] Preferably, the cleaning brush includes a brush body and bristles. The brush body is slidably mounted on the support. The brush body is L-shaped. The two brush bodies are symmetrical about the center of the guide bearing. The bristles are mounted on the corresponding brush bodies.
[0018] Preferably, the cleaning brush is located below the guide bearing.
[0019] In summary, this application includes the following beneficial technical effects:
[0020] When the drill rod and drill bit rotate downwards to drill, the drill rod remains within the guide bearing. Due to the certain gap between the drill rod and the inner wall of the guide bearing's inner ring, the drill rod will not contact the inner wall of the guide bearing's inner ring when it is not vibrating or vibrating within a preset range. However, when the drill rod and drill bit drill into a hard foundation, causing the drill rod to vibrate significantly, the drill rod will contact the inner wall of the guide bearing's inner ring and drive the guide bearing's inner ring to rotate. At this time, the guide bearing can limit the drill rod's movement, and with the action of the buffer, it can buffer the vibration of the drill rod, helping to limit the drill rod's swing range to a certain extent and ensure the quality of the hole. At the same time, it can reduce the wear of the guide bearing's inner ring during the drill rod's vibration, extending the service life of the guide bearing. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.
[0022] Figure 2 This is an exploded view of the overall structure of the support location in the embodiment of this application.
[0023] Figure 3 This is a schematic diagram of the overall structure of the cleaning brush in the embodiments of this application.
[0024] Explanation of reference numerals in the attached drawings: 1. Main body of the machine; 2. Drill tower; 3. Support; 4. Guide bearing; 5. Mounting ring; 6. Annular groove; 7. Elastic buffer layer; 8. Cleaning brush; 81. Brush body; 82. Brush bristles; 9. Sliding block; 10. Connecting rod; 11. Cylinder; 12. Power head; 13. Drill rod; 14. Mounting hole; 15. First guide rail; 16. Second guide rail. Detailed Implementation
[0025] The following combination Figures 1-3 This application will be described in further detail.
[0026] This application discloses a long spiral drilling rig for pile driving. (Refer to...) Figure 1 and Figure 2 The long spiral drilling rig for pile driving includes a body 1, a drilling tower 2, a support 3, a guide bearing 4, and a buffer component. The body 1 has a walking device, which can be either a wheeled structure or a tracked structure, without limitation. To improve the stability of the body 1 during drilling, hydraulic outriggers can be installed at the four corners of the body 1. The drilling tower 2 is fixed vertically to the body 1. To improve the stability of the drilling tower 2, a support rod is installed between the body 1 and the drilling tower 2. The drilling rig in this application also includes a power head 12, a top drive mechanism, a drill rod 13, a drill bit, a winch, ropes, guide pulleys, and other structures for drilling and pile driving. These structures are the same as those in related technologies and belong to the prior art, so they will not be described in detail here.
[0027] Reference Figure 1 and Figure 2The support 3 is fixedly mounted on the drill tower 2, located below the power head 12 on the drill tower 2. Specifically, the support 3 is located at the lower end of the drill tower 2. The outer ring of the guide bearing 4 is fixedly mounted on the support 3. The guide bearing 4 is a low-friction bearing such as a ball bearing or an air bearing. The inner ring of the guide bearing 4 is coaxially arranged with the drill rod 13 on the power head 12, and the drill rod 13 on the power head 12 passes through the inner ring of the guide bearing 4. The difference between the inner diameter of the guide bearing 4 and the outer diameter of the spiral cutterhead on the drill rod 13 is less than 3 mm. In this embodiment, the difference between the inner diameter of the guide bearing 4 and the outer diameter of the spiral cutterhead on the drill rod 13 is 2 mm. In other embodiments, the difference between the inner diameter of the guide bearing 4 and the outer diameter of the spiral cutterhead on the drill rod 13 can be designed according to the preset vibration range of the drill rod 13. A buffer is disposed between the outer ring of the guide bearing 4 and the support 3 to buffer the lateral movement of the guide bearing 4.
[0028] When the drill rod 13 and drill bit rotate downwards to drill, the drill rod 13 is always located in the inner ring of the guide bearing 4. Because there is a certain gap between the drill rod 13 and the inner wall of the guide bearing 4, the drill rod 13 will not contact the inner wall of the guide bearing 4 when the drill rod 13 does not vibrate or experiences micro-vibration within a preset range. However, when the drill rod 13 and drill bit drill into a hard foundation, causing the drill rod 13 to vibrate significantly beyond the preset range, the drill rod 13 will contact the inner wall of the guide bearing 4 and drive the inner ring of the guide bearing 4 to rotate, transmitting the lateral vibration to the guide bearing 4. At this time, the guide bearing 4 can not only limit the drill rod 13, but also buffer the vibration of the drill rod 13 under the action of the buffer, which helps to limit the swing range of the drill rod 13 and ensure the quality of hole formation and pile formation. At the same time, since the inner ring of the guide bearing 4 can rotate with the drill rod 13, the wear of the inner ring of the guide bearing 4 caused by the vibration of the drill rod 13 is reduced, and the service life of the guide bearing 4 is extended.
[0029] Reference Figure 2 To facilitate the installation of the guide bearing 4, the support 3 is provided with a mounting hole 14 for installing the guide bearing 4. The guide bearing 4 is installed in the mounting hole 14. Furthermore, mounting rings 5 are fixed on both the upper and lower sides of the outer ring of the guide bearing 4. The outer diameter of the mounting ring 5 is larger than the outer diameter of the outer ring of the guide bearing 4. The upper and lower surfaces of the mounting hole 14 are provided with annular grooves 6 that engage with the mounting rings 5. The diameter of the annular grooves 6 is larger than the outer diameter of the mounting rings 5.
[0030] Reference Figure 2 To facilitate the buffering of the lateral movement of the guide bearing 4, the buffer includes an elastic buffer layer 7, which is fixed between the outer ring of the guide bearing 4 and the inner wall of the mounting hole 14. Specifically, the elastic buffer layer 7 is made of high-damping rubber.
[0031] When the drill rod 13 vibrates beyond the preset range, it will abut against the inner ring of the guide bearing 4. The inner ring of the guide bearing 4 will transmit the force to the outer ring of the guide bearing 4, causing the outer ring of the guide bearing 4 to have a tendency to swing laterally. Through the setting of the elastic buffer layer 7, the vibration energy can be absorbed and buffering can be achieved, thereby helping to limit the swing range of the drill rod 13 and ensure the drilling quality.
[0032] Reference Figure 1 , Figure 2 and Figure 3 To prevent soil and debris on the drill rod 13 from easily entering the guide bearing 4 when the drill rod 13 is lifted, cleaning brushes 8 are slidably installed on opposite sides of the support 3. The cleaning brushes 8 are located below the guide bearing 4, and the sliding direction of the two cleaning brushes 8 is perpendicular to the axis of the guide bearing 4. The cleaning brush 8 includes a brush body 81 and bristles 82. The brush body 81 is slidably installed on the support 3 and is L-shaped. The two brush bodies 81 are symmetrical about the center of the guide bearing 4, so as to surround the drill rod 13. The bristles 82 are installed on the inner wall of the corresponding brush body 81 and are made of wire brush to brush the soil and debris on the outer wall of the drill rod 13.
[0033] Reference Figure 2 and Figure 3 Specifically, in order to facilitate the sliding of the cleaning brush 8, the support 3 is fixed with first guide rails 15 on opposite sides. The first guide rails 15 correspond one-to-one with the cleaning brush 8, and the brush body 81 of the cleaning brush 8 is slidably connected to the corresponding first guide rail 15. The support 3 is provided with an adjustment component, which is used to drive the cleaning brush 8 to move toward or away from the center of the guide bearing 4.
[0034] Reference Figure 2 and Figure 3 To facilitate the movement of the cleaning brush 8 toward or away from the center of the guide bearing 4, the adjustment assembly includes a sliding block 9, a connecting rod 10, and a driving component. The sliding block 9 is slidably mounted on the support 3 and aligned with the middle position of the two cleaning brushes 8. The sliding direction of the sliding block 9 is perpendicular to the arrangement direction of the two cleaning brushes 8. Specifically, a second guide rail 16 is fixed on the support 3, and the sliding block 9 is slidably connected to the second guide rail 16, thereby guiding the sliding of the sliding block 9.
[0035] Reference Figure 2 and Figure 3The connecting rod 10 corresponds one-to-one with the cleaning brush 8. One end of the connecting rod 10 is hinged to the brush body 81 of the corresponding cleaning brush 8, and the other end is hinged to the sliding block 9. The hinge axis of the connecting rod 10 is parallel to the axis of the guide bearing 4. The driving component is used to drive the sliding block 9 to slide. Further, the driving component includes a cylinder 11 fixedly installed on the support 3. The sliding block 9 is connected to the piston rod of the cylinder 11. The extension and retraction direction of the cylinder 11 is parallel to the sliding direction of the sliding block 9. In other embodiments, the cylinder 11 can be replaced by an electric push rod, a hydraulic cylinder, etc.
[0036] When the drill rod 13 rotates downwards to drill, the cylinder 11 is activated. The cylinder 11 drives the sliding block 9 to move towards the center of the guide bearing 4. The sliding block 9, through two connecting rods 10, pushes the two brush bodies 81 to move away from each other, thereby causing the brush bodies 81 to disengage the bristles 82 from the drill rod 13. This prevents damage to the bristles 82 during the rotation of the drill rod 13 and also minimizes interference with the rotation of the drill rod 13. When drilling is completed and the drill rod 13 is lifted for grouting, the cylinder 11 is activated. 1. Drive the sliding block 9 to move away from the center of the guide bearing 4. The sliding block 9 pulls the two brush bodies 81 to move towards each other through the two connecting rods 10. This causes the brush bodies 81 to drive the bristles 82 to abut against the drill rod 13. During the slow upward movement of the drill rod 13, the bristles 82 can brush off most of the soil and debris on the drill rod 13, making it difficult for the soil and debris to enter the guide bearing 4 and affect the use of the guide bearing 4. At the same time, it also prevents the soil and debris from moving to a high place with the drill rod 13, reducing safety hazards.
[0037] The implementation principle of this application embodiment is as follows: Before the drill rod 13 and drill bit rotate downward to drill, the cylinder 11 is activated. The cylinder 11 drives the sliding block 9 to move towards the center of the guide bearing 4. The sliding block 9 pushes the two brush bodies 81 to move away from each other through two connecting rods 10, thereby causing the brush bodies 81 to disengage the bristles 82 from the drill rod 13. Then, the drill rod 13 and drill bit are driven to rotate downward to drill. The drill rod 13 is always located in the inner ring of the guide bearing 4. Since there is a certain gap between the drill rod 13 and the inner wall of the inner ring of the guide bearing 4, when the drill rod 13 does not vibrate or vibrates slightly within a preset range, the drill rod 13... The spiral cutterhead will not contact the inner wall of the inner ring of the guide bearing 4. However, when the drill rod 13 and the drill bit drill into a hard foundation, causing the drill rod 13 to vibrate significantly, the drill rod 13 will contact the inner wall of the inner ring of the guide bearing 4 and drive the inner ring of the guide bearing 4 to rotate. The guide bearing 4 limits the movement of the drill rod 13. The vibration of the drill rod 13 causes the guide bearing 4 to tend to swing laterally. The elastic buffer layer 7 can absorb the vibration energy and achieve buffering, thereby helping to limit the swing range of the drill rod 13 and ensuring the quality of hole formation and pile formation. At the same time, it can reduce the wear of the inner ring of the guide bearing 4 caused by the vibration of the drill rod 13 and extend the service life of the guide bearing 4.
[0038] When drilling is completed and the drill rod 13 is lifted for grouting, the cylinder 11 is activated. The cylinder 11 drives the sliding block 9 to move away from the center of the guide bearing 4. The sliding block 9 pulls the two brush bodies 81 towards each other through the two connecting rods 10, so that the brush bodies 81 drive the bristles 82 to abut against the drill rod 13. During the slow lifting of the drill rod 13, the bristles 82 can brush off most of the soil and debris on the drill rod 13, making it less likely for the soil and debris to enter the guide bearing 4 and affect the use of the guide bearing 4. At the same time, it also prevents the soil and debris from moving to a high place with the drill rod 13, reducing safety hazards.
[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A long spiral drilling rig for pile driving, characterized in that, include: fuselage (1); Drilling tower (2), which is mounted on the fuselage body (1); Support (3), the support (3) is provided on the drilling tower (2) and located below the power head (12) on the drilling tower (2); The outer ring of the guide bearing (4) is set on the support (3), and the drill rod (13) on the power head (12) is located in the inner ring of the guide bearing (4). The difference between the inner diameter of the inner ring of the guide bearing (4) and the outer diameter of the spiral cutter head on the drill rod (13) is less than 3mm. A buffer element is disposed between the outer ring of the guide bearing (4) and the support (3) to buffer the lateral movement of the guide bearing (4).
2. The long spiral drilling rig for pile driving according to claim 1, characterized in that: Mounting rings (5) are provided on both the upper and lower sides of the outer ring of the guide bearing (4). An annular groove (6) that cooperates with the mounting ring (5) is provided on the support (3). The diameter of the annular groove (6) is larger than the outer diameter of the mounting ring (5).
3. The long spiral drilling rig for pile driving according to claim 2, characterized in that: The buffer includes an elastic buffer layer (7) disposed between the outer ring of the guide bearing (4) and the support (3).
4. The long spiral drilling rig for pile driving according to claim 1, characterized in that: Cleaning brushes (8) are slidably arranged on opposite sides of the support (3). The sliding direction of the two cleaning brushes (8) is perpendicular to the axial direction of the guide bearing (4). An adjustment component is provided on the support (3). The adjustment component is used to drive the cleaning brushes (8) to move toward or away from the center of the guide bearing (4).
5. A long spiral drilling rig for pile driving according to claim 4, characterized in that: The adjustment assembly includes a sliding block (9), a connecting rod (10), and a driving member. The sliding block (9) is slidably mounted on the support (3). The sliding block (9) is aligned with the middle position of the two cleaning brushes (8). The sliding direction of the sliding block (9) is perpendicular to the arrangement direction of the two cleaning brushes (8). The connecting rod (10) corresponds one-to-one with the cleaning brushes (8). One end of the connecting rod (10) is hinged to the corresponding cleaning brush (8), and the other end is hinged to the sliding block (9). The hinge axis of the connecting rod (10) is parallel to the axial direction of the guide bearing (4). The driving member is used to drive the sliding block (9) to slide.
6. A long spiral drilling rig for pile driving according to claim 5, characterized in that: The driving component includes a cylinder (11) mounted on a support (3), and the sliding block (9) is connected to the piston rod of the cylinder (11).
7. A long spiral drilling rig for pile driving according to claim 4, characterized in that: The cleaning brush (8) includes a brush body (81) and bristles (82). The brush body (81) is slidably mounted on the support (3). The brush body (81) is L-shaped. The two brush bodies (81) are symmetrical about the center of the guide bearing (4). The bristles (82) are mounted on the corresponding brush body (81).
8. A long spiral drilling rig for pile driving according to any one of claims 4-7, characterized in that: The cleaning brush (8) is located below the guide bearing (4).