Drilling device for civil engineering pile foundation

Abstract

The utility model relates to the technical field of drilling devices, and discloses a pile foundation drilling device for civil engineering, which comprises a drilling rod and a vehicle-mounted elevator, a power head is arranged on the vehicle-mounted elevator, the power head is meshed with the drilling rod, the lower end of the drilling rod is fixedly connected with ball seats which are uniformly distributed, and the ball seats are arranged on the vehicle-mounted elevator. Ball rods are rotatably mounted in the middles of the interiors of the ball seats, drilling teeth are fixedly connected to the lower ends of the ball rods, adapters are fixedly mounted at the ends, facing the circle center, of the drilling teeth, a fixing seat is fixedly mounted in the position, close to the middle, of the interior of the drilling rod, and a hydraulic cylinder is fixedly mounted in the middle of the lower end of the fixing seat; and a lifting disc is fixedly mounted at the telescopic end of the lower end of the hydraulic cylinder. According to the device, the requirement for reducing extra auxiliary soil sampling equipment or complicated operation steps can be met, soil sampling operation is more convenient and efficient, meanwhile, the anti-collapse cylinder can be brought into a hole during drilling, the stability of the hole wall is enhanced through the supporting effect of the anti-collapse cylinder, and operation is convenient and flexible.

Description

Technical Field

[0001] This utility model relates to the field of drilling device technology, and in particular to a drilling device for pile foundations in civil engineering. Background Technology

[0002] The power head of a rotary drilling rig is the core actuator of the rig. Its main function is to efficiently transmit power to the drill rod and drill bit, driving them to complete key operations such as rotary drilling and rock breaking, while also bearing the complex loads during the drilling process.

[0003] In the field of civil engineering pile foundation construction, drilling equipment is one of the key pieces of equipment. While commonly used drilling devices can achieve basic drilling functions, they still have some shortcomings in practical applications. For example, some drilling devices require additional complex equipment or cumbersome operations to remove soil from the hole during the soil extraction stage. This not only increases construction costs and time but also reduces operational efficiency. Furthermore, in terms of soil treatment, the soil extracted by these devices is often in clumps or adhered together. When detaching from the excavator head, the forward and reverse rotation of the power head is required to rapidly rotate the drill rod back and forth, using the rotational inertia to shake off the soil. Often, a considerable amount of forward and reverse rotation of the power head is needed to remove the soil clumps from the excavator head. Moreover, clumps or adhered soil are difficult to use directly for on-site backfilling, mud preparation, or other subsequent projects, requiring additional screening or crushing.

[0004] Furthermore, borehole wall collapse is a common problem during drilling, and existing technologies mostly rely on external support structures, which are complex and costly. At the same time, in dense pile foundation drilling operations, existing equipment struggles to effectively prevent vibrations between adjacent boreholes, resulting in poor operational continuity and hindering further improvements in drilling efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a drilling device for pile foundations in civil engineering, which has the advantages of efficient soil extraction, easy soil treatment, anti-collapse function, and good operational continuity, thus solving some of the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a drilling device for pile foundations in civil engineering, comprising a drill rod and a vehicle-mounted lifting platform. The vehicle-mounted lifting platform is equipped with a power head, which meshes with the drill rod. The lower end of the drill rod is fixedly connected to evenly distributed ball seats. A ball rod is rotatably mounted in the center of each ball seat. Drill teeth are fixedly connected to the lower end of each ball rod. A converter is fixedly mounted on the center-facing end of each drill tooth. A fixed seat is fixedly mounted near the center of the drill rod. A hydraulic cylinder is fixedly mounted in the center of the lower end of the fixed seat. A lifting plate is fixedly mounted on the telescopic end of the lower end of the hydraulic cylinder. Evenly distributed rocker arms are rotatably mounted near the edge of the lower end of the lifting plate. The lower ends of the rocker arms are rotatably connected to the converters. A drill bit is fixedly mounted in the center of the lower end of the lifting plate, with the lower end of the drill bit lower than the lower end of the drill teeth.

[0007] Furthermore, a rotating groove is provided on the ball seat at one end facing the center, and the ball rod passes through and is rotatably connected inside the rotating groove, ensuring that the drill teeth can rotate normally, while also serving as a limiting and guiding function.

[0008] Furthermore, the other end of each drill bit is fixedly connected to a support block near the upper side, and the upper end of each support block is rotatably equipped with evenly distributed ball bearings, which serve as a limiting force for removing the anti-collapse cylinder.

[0009] Furthermore, an anti-collapse cylinder is slidably sleeved on the outer side of the drill rod, and a ring rail is provided at the middle of the lower end of the anti-collapse cylinder. The ring rail is adapted to the ball bearings to prevent the anti-collapse cylinder from falling onto the support block and causing excessive friction during rotation.

[0010] Furthermore, a pressure ring is fixedly sleeved on the outer side of the drill rod at the upper side of the anti-collapse cylinder. The diameter of the anti-collapse cylinder and the pressure ring does not exceed the maximum rotary drilling diameter of the drill teeth, ensuring the rationality of the design. The pressure ring can drive the anti-collapse cylinder to descend when the drill rod descends, avoiding the difficulty of falling due to friction between it and the soil.

[0011] The advantages of this utility model are as follows:

[0012] 1. This drilling device, through its unique structural design, can collect the cut soil inside the drill rod during the drilling process through the coordinated action of the drill teeth and lifting plate, and directly bring it out when the drill rod is lifted. Compared with traditional drilling devices, this method effectively simplifies the soil extraction process, reduces the need for additional auxiliary soil extraction equipment or complicated operating steps, and makes soil extraction operations more convenient and efficient. At the same time, the broken soil can be directly used for on-site backfilling, making mud or engineering materials, etc., without the need for additional screening or crushing.

[0013] 2. This device cleverly utilizes the cooperation mechanism between the anti-collapse cylinder and the drill teeth. During drilling, the anti-collapse cylinder can be brought into the hole, and its supporting effect enhances the stability of the hole wall. When drilling is completed and the drill rod is removed, the anti-collapse cylinder is released by controlling the state of the drill teeth, allowing it to remain in the hole and continue to play its anti-collapse role. This design reduces the risk of hole wall collapse to a certain extent, creating a relatively safe and stable working environment for subsequent pile foundation construction, and helps to improve the overall construction quality and safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the drill rod of this utility model;

[0016] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A;

[0017] Figure 4 This is a schematic diagram of the drill tooth connection structure of this utility model.

[0018] In the diagram: 1. Drill rod; 2. Ball seat; 3. Ball rod; 4. Drill teeth; 5. Adapter; 6. Fixed seat; 7. Hydraulic cylinder; 8. Lifting plate; 9. Rocker arm; 10. Rotary groove; 11. Drill bit; 12. Support block; 13. Ball bearing; 14. Anti-collapse cylinder; 15. Ring rail; 16. Pressure ring; 17. Vehicle-mounted lift; 18. Power head. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4A drilling device for civil engineering pile foundations includes a drill rod 1 and a vehicle-mounted lifting platform 17. A power head 18 is mounted on the vehicle-mounted lifting platform 17 and meshes with the drill rod 1. The lower end of the drill rod 1 is fixedly connected to evenly distributed ball seats 2. Ball rods 3 are rotatably mounted in the center of each ball seat 2. Drill teeth 4 are fixedly connected to the lower end of each ball rod 3. An adapter 5 is fixedly mounted on the center-facing end of each drill tooth 4. A fixed seat 6 is fixedly mounted near the center of the drill rod 1. A hydraulic cylinder 7 is fixedly mounted in the center of the lower end of the fixed seat 6. A lifting plate 8 is fixedly mounted on the telescopic end of the lower end of the hydraulic cylinder 7. The lower end of the lifting plate 8... Near the edge, evenly distributed rocker arms 9 are rotatably mounted. The lower end of the rocker arms 9 is rotatably connected to the adapter 5. A drill bit 11 is fixedly mounted at the lower middle of the lifting plate 8. The lower end of the drill bit 11 is lower than the lower end of the drill teeth 4. A rotating groove 10 is provided on the ball seat 2 at the end facing the center. The ball rod 3 passes through and is rotatably connected inside the rotating groove 10. By opening the power head 18, the drill rod 1 is driven to lift and rotate. The rotation of the drill rod 1 can ultimately drive the drill teeth 4 and the drill bit 11 to rotate. The drill teeth 4 mechanically cut the soil, creating a circular channel. At the same time, the rotation of the drill bit 11 can break up the cut soil column. As the drill rod 1 descends, the broken soil enters its interior. After drilling to a certain depth, the hydraulic cylinder 7 drives the lifting plate 8 to rise. The rise of the lifting plate 8 drives the rocker arm 9 to pull the drill teeth 4 inward. During this process, the design of the rotating groove 10 ensures that the ball rod 3 rotates normally under the drive of the drill teeth 4. When the drill teeth 4 rotate to a horizontal position, they stop, thus forming a sealing plate structure to seal the bottom of the drill rod 1. Then, when the drill rod 1 is pulled out of the channel by the power head 18, the soil can be directly brought out. Then, the hydraulic cylinder 7 drives the lifting plate 8 to descend, resetting the drill teeth 4. At the same time, the lifting plate 8 and other structures... Driven by the structure, it can effectively promote the falling of internal soil. Compared with some existing drilling devices, this drilling device can not only extract the cut soil for further drilling operations, but also avoid the soil from becoming blocked inside the drill rod 1 and difficult to fall out by using the lifting operation of the lifting plate 8, which greatly improves drilling efficiency. In addition, the cutting soil can be broken up by the crushing action of the drill bit 11 and other structures, so that it can be directly used for on-site backfilling, making mud or engineering materials, etc., without the need for additional screening or crushing. The vehicle-mounted lifting platform and power head are used in conjunction with the construction vehicle. This is existing technology and will not be described in detail here.

[0021] Please see Figures 2-3The other end of the drill teeth 4 is fixedly connected to a support block 12 near the upper side. Evenly distributed balls 13 are rotatably mounted on the upper end of each support block 12. An anti-collapse cylinder 14 is slidably sleeved on the outer side of the drill rod 1. A ring rail 15 is provided at the middle of the lower end of the anti-collapse cylinder 14, and the ring rail 15 is adapted to the balls 13. A pressure ring 16 is fixedly sleeved on the outer side of the drill rod 1 above the anti-collapse cylinder 14. The diameter of the anti-collapse cylinder 14 and the pressure ring 16 does not exceed the maximum rotary drilling diameter of the drill teeth 4. By retracting the drill teeth 4, the anti-collapse cylinder 14 can be sleeved on the outer side of the drill rod 1, thus allowing the anti-collapse cylinder 14 to be brought into the borehole during drilling. Inside the channel, when the drill rod 1 is removed, the limiting effect on the anti-collapse cylinder 14 can be released by retracting the drill teeth 4, thus leaving the anti-collapse cylinder 14 inside the channel. The supporting effect of the anti-collapse cylinder 14 can effectively prevent collapse. The operation is simple and the structure is ingenious. It is particularly suitable for drilling operations of densely distributed pile foundations. When carrying out the next set of drilling operations, it can effectively avoid the impact of vibration, improve the continuity of operation, and further improve the drilling efficiency of this device. When it is necessary to remove the anti-collapse cylinder 14, simply reset the drill teeth 4 to the working state. When rising, it can be removed together with the support block 12.

[0022] Working principle: During use, the power head 18 drives the drill rod 1 to lift and rotate. The rotation of the drill rod 1 ultimately drives the drill teeth 4 and drill bit 11 to rotate. The drill teeth 4 mechanically cuts the soil, creating a circular channel. Simultaneously, the rotation of the drill bit 11 breaks up the cut soil column. The broken soil enters the drill rod 1 as it descends. After drilling to a certain depth, the hydraulic cylinder 7 drives the lifting plate 8 to rise. The rise of the lifting plate 8 drives the rocker arm 9 to pull the drill teeth 4 inward. During this process, the design of the rotating groove 10 ensures that the ball rod 3 rotates normally under the drive of the drill teeth 4. When the drill teeth 4 rotate to a horizontal position, they stop, thus forming a sealing plate structure to seal the bottom of the drill rod 1. This seals the bottom of the drill rod 1, allowing the power head 18 to... When the drill rod 1 is pulled out of the channel, the soil can be directly brought out. Then, the hydraulic cylinder 7 drives the lifting plate 8 to descend and reset the drill teeth 4. At the same time, the lifting plate 8 and other structures can effectively promote the falling of the soil inside. Furthermore, after the drill teeth 4 are retracted inside, the anti-collapse cylinder 14 can be fitted on the outside of the drill rod 1. Thus, during the drilling process, the anti-collapse cylinder 14 can be brought into the channel together. When the drill rod 1 is taken out, the limiting effect on the anti-collapse cylinder 14 can be released by retracting the drill teeth 4. Thus, the anti-collapse cylinder 14 can be left inside the channel. The supporting effect of the anti-collapse cylinder 14 can effectively prevent collapse. When it is necessary to remove the anti-collapse cylinder 14, simply reset the drill teeth 4 to the working state. When rising, it can be taken out together by the support block 12.

Claims

1. A drilling device for civil engineering pile foundations, comprising a drill rod (1) and a vehicle-mounted elevator (17), wherein a power head (18) is provided on the vehicle-mounted elevator (17), and the power head (18) engages with the drill rod (1), characterized in that: The lower end of the drill rod (1) is fixedly connected to a uniformly distributed ball seat (2). A ball rod (3) is rotatably installed in the middle of the ball seat (2). A drill tooth (4) is fixedly connected to the lower end of the ball rod (3). A connector (5) is fixedly installed on the end of the drill tooth (4) facing the center. A fixed seat (6) is fixedly installed near the middle of the inside of the drill rod (1). A hydraulic cylinder (7) is fixedly installed in the middle of the lower end of the fixed seat (6). A lifting plate (8) is fixedly installed at the lower telescopic end of the hydraulic cylinder (7). A rocker arm (9) is rotatably installed near the edge of the lower end of the lifting plate (8). The lower end of the rocker arm (9) is rotatably connected to the connector (5). A drill bit (11) is fixedly installed in the middle of the lower end of the lifting plate (8). The lower end of the drill bit (11) is lower than the lower end of the drill tooth (4).

2. The drilling device for civil engineering pile foundations according to claim 1, characterized in that: The ball seat (2) has a rotating groove (10) at one end facing the center, and the ball rod (3) passes through and is rotatably connected inside the rotating groove (10).

3. The drilling device for civil engineering pile foundations according to claim 1, characterized in that: The other end of each drill bit (4) is fixedly connected to a support block (12) near the upper side, and the upper end of each support block (12) is rotatably equipped with evenly distributed balls (13).

4. The drilling device for civil engineering pile foundations according to claim 3, characterized in that: The drill rod (1) is slidably sleeved with an anti-collapse cylinder (14), and a ring rail (15) is provided at the middle of the lower end of the anti-collapse cylinder (14). The ring rail (15) is adapted to the ball (13).

5. A drilling device for civil engineering pile foundations according to claim 1, characterized in that: A pressure ring (16) is fixedly sleeved on the outside of the drill rod (1) on the upper side of the anti-collapse cylinder (14). The diameter of the anti-collapse cylinder (14) and the pressure ring (16) does not exceed the maximum rotary drilling diameter of the drill teeth (4).

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