A double-layer tubular drill for rock-embedded construction of large-diameter rotary piles

Abstract

This utility model relates to the field of building construction technology, and in particular to a double-layer cylinder drill for large-diameter rotary drilling pile rock-embedded construction. It includes a double-layer cylinder drill body and a positioning block, with a positioning seat fixedly connected to the upper center of the double-layer cylinder drill body. This double-layer cylinder drill for large-diameter rotary drilling pile rock-embedded construction, based on the initial locking achieved by the locking block and locking slot, and reinforced by two hexagonal socket head cap screws, significantly reduces the number of bolts used compared to traditional multi-bolt connections. It also reduces the number of bolt alignment and tightening steps during installation, avoiding the time consumption and cumbersome operation caused by installing a large number of bolts, thus improving overall installation efficiency. When it is necessary to inspect, repair, or replace parts of the double-layer cylinder drill body, the two hexagonal socket head cap screws can be easily removed and the locking released. After maintenance, it can be quickly reinstalled through the same simple process, reducing maintenance downtime and ensuring the continuity of construction.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a double-layer cylinder drill for rock-embedded construction of large-diameter rotary drilling piles. Background Technology

[0002] Currently, the existing connection methods between double-layer drill rigs and the output end of rotary drilling rigs in the industry generally rely on a multi-bolt fully enclosed fixing structure. That is, the upper end of the double-layer drill rig body is usually equipped with a flange or connecting seat, and 8-16 high-strength bolts (the specific number increases with the increase of the drill rig diameter) are evenly distributed around the circumference of the flange to rigidly lock the corresponding connection structure between the double-layer drill rig and the output end of the rotary drilling rig. First, the large number of bolts and their wide distribution range mean that the alignment of the holes of each bolt needs to be repeatedly adjusted, and each bolt needs to be tightened one by one with a torque wrench. The entire installation process is time-consuming. Moreover, when the double-layer drill rig has faults such as tooth wear or cylinder wall deformation and needs to be disassembled and repaired, the disassembly and subsequent reassembly of multiple bolts consume a lot of manpower and time costs. Therefore, we have introduced a new double-layer drill rig for large-diameter rotary pile rock embedding construction. Utility Model Content

[0003] The main objective of this invention is to provide a double-layer cylinder drill for large-diameter rotary drilling pile rock-embedded construction, which can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A double-layer rotary drilling rig for rock-embedded construction of large-diameter rotary piles includes a double-layer drilling rig body and a positioning block. A positioning seat is fixedly connected to the upper middle part of the double-layer drilling rig body. A positioning cavity is opened at the upper end of the positioning seat. Hexagonal socket head caps are inserted and connected to the upper front and upper rear parts of the positioning seat. Locking slots are opened at the lower left and lower right parts of the positioning seat. Reinforcing wing plates are fixedly connected to the four outer corners of the positioning seat. A connector is fixedly connected to the upper end of the positioning block. Threaded slots are opened at the upper front and upper rear parts of the positioning block. Elastic cavities are opened in the lower left and lower right parts of the positioning block. A strong spring is fixedly connected to the inner wall of the two adjacent elastic cavities. A connecting block is fixedly connected to the back of the two strong springs. A locking block is fixedly connected to the back of the two connecting blocks. A pushing inclined surface is provided at the lower part of the two locking blocks.

[0005] Preferably, the positioning block engages with the positioning cavity, and the two hexagonal socket bolts are symmetrically distributed front and back.

[0006] By adopting the above technical solution, the locking connection between the positioning block and the positioning cavity provides a positioning reference for the initial assembly of the double-layer drill body and the positioning seat, avoiding positional deviations during subsequent locking block engagement and bolt connection, and ensuring the coaxiality of the overall assembly.

[0007] Preferably, the two locking slots are symmetrically distributed from left to right, and both locking slots are connected to the inside of the positioning cavity.

[0008] By adopting the above technical solution, the two locking slots are symmetrically distributed on the left and right, which can be precisely matched with the locking blocks that are symmetrically set on the left and right sides inside the positioning block, ensuring that the two locking blocks can be simultaneously locked into the locking slots after popping out.

[0009] Preferably, the lower ends of the four reinforcing wing plates are fixedly connected to the double-layer tubular drill body, and the upper ends of the connectors are fixedly connected to the output end of the rotary drilling rig.

[0010] By adopting the above technical solution, the lower ends of the four reinforcing wing plates are fixedly connected to the double-layer drill body, which can enhance the structural strength of the connection between the positioning seat and the double-layer drill body.

[0011] Preferably, the two hexagon socket bolts are threaded to the two threaded slots respectively, and the two connecting blocks are located inside the two elastic cavities respectively.

[0012] By adopting the above technical solution, two internal hex bolts are respectively threaded to two threaded slots, which can achieve detachable rigid fixation of the positioning block and the positioning seat, and can reduce the amount of bolts used.

[0013] Preferably, the two locking blocks are slidably connected to the two elastic cavities respectively, and the two locking blocks are engaged with the two locking slots respectively.

[0014] By adopting the above technical solution, the two locking blocks are slidably connected to the elastic cavity, providing a stable movement path for the extension and retraction of the locking blocks, ensuring that the locking blocks can smoothly retract into the elastic cavity when the inclined plane is subjected to force, and can smoothly pop out when the powerful spring returns to its original position.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By fixing the connector to the output end of the rotary drilling rig, the positioning block is inserted into the positioning cavity from the vertical direction. When the two locking blocks contact the positioning cavity, the two locking blocks automatically move into the two elastic cavities under the thrust of the two pushing inclined surfaces and the strong spring contracts. When the positioning block is fully inserted into the positioning cavity, the two locking blocks correspond to the positions of the two locking slots respectively, and the two locking blocks automatically pop out from the two locking slots and lock through the elastic force of the strong spring, so that the double-layer barrel drill body can be initially positioned and installed on the output end of the rotary drilling rig. 2. Based on the initial locking achieved through the locking block and locking slot, and reinforced by two internal hex bolts, the number of bolts used is significantly reduced compared to traditional multi-bolt connections. This reduces the number of steps involved in bolt alignment and tightening during installation, avoiding the time consumption and cumbersome operation caused by installing a large number of bolts, and improving the overall installation efficiency. When it is necessary to inspect, repair, or replace parts of the double-layer drill body, the two internal hex bolts can be easily removed and the locking can be released. After maintenance, it can be quickly reinstalled through the same simple process, reducing maintenance downtime and ensuring the continuity of construction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a double-layer cylindrical drill for rock-embedded construction of large-diameter rotary drilling piles according to this utility model; Figure 2 This is a schematic diagram showing the disassembled structure of a double-layer cylindrical drill for rock-embedded construction of large-diameter rotary piles according to this utility model. Figure 3 This is a schematic diagram of the internal structure of the positioning block of a double-layer cylindrical drill for rock-embedded construction of large-diameter rotary piles according to this utility model. Figure 4 This is a schematic diagram of the overall structure of the positioning seat for a double-layer cylindrical drill used in rock-embedded construction of large-diameter rotary piles according to this utility model.

[0017] In the diagram: 1. Double-layer drill body; 2. Positioning block; 3. Positioning seat; 4. Positioning cavity; 5. Socket head bolt; 6. Locking slot; 7. Reinforcing wing plate; 8. Connecting piece; 9. Threaded slot; 10. Elastic cavity; 11. Strong spring; 12. Connecting block; 13. Locking block; 14. Pushing ramp. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figure 1-4 This utility model provides a technical solution: A double-layer rotary drilling rig for rock-embedded construction of large-diameter rotary piles includes a double-layer drilling rig body 1 and a positioning block 2. A positioning seat 3 is fixedly connected to the upper middle part of the double-layer drilling rig body 1. A positioning cavity 4 is opened at the upper end of the positioning seat 3. Hexagonal bolts 5 are inserted and connected to the upper front and upper rear ends of the positioning seat 3. Locking slots 6 are opened at the lower left and lower right ends of the positioning seat 3. Reinforcing wing plates 7 are fixedly connected to the four outer corners of the positioning seat 3. A connector 8 is fixedly connected to the upper end of the positioning block 2. Threaded slots 9 are opened at the upper front and upper rear ends of the positioning block 2. Elastic cavities 10 are opened in the lower left and lower right inner parts of the positioning block 2. A strong spring 11 is fixedly connected to the adjacent inner walls of the two elastic cavities 10. A connecting block 12 is fixedly connected to the opposite sides of the two strong springs 11. A locking block 13 is fixedly connected to the opposite sides of the two connecting blocks 12. A pushing inclined surface 14 is provided at the lower part of the two locking blocks 13.

[0022] In this embodiment, the positioning block 2 is engaged with the positioning cavity 4, the two internal hex bolts 5 are symmetrically distributed front and back, the two locking slots 6 are symmetrically distributed left and right, and both locking slots 6 are connected to the inside of the positioning cavity 4. The lower ends of the four reinforcing wing plates 7 are fixedly connected to the double-layer barrel drill body 1, and the upper end of the connecting piece 8 is fixedly connected to the output end of the rotary drilling rig.

[0023] Through the above scheme: the engaging connection between the positioning block 2 and the positioning cavity 4 provides an initial positioning reference for the assembly of the double-layer drill body 1 and the positioning seat 3, ensuring the accuracy of the alignment of the subsequent connection structure; the symmetrical distribution of the two hexagonal socket bolts 5 at the front and rear can make the front and rear ends of the positioning block 2 bear force evenly, and at the same time facilitate the quick and accurate positioning during installation; the symmetrical distribution of the two locking slots 6 on the left and right and their internal communication with the positioning cavity 4 can be precisely matched with the locking blocks 13 set on the left and right sides inside the positioning block 2, ensuring that the locking blocks 13 can be symmetrically engaged after popping out, ensuring the left and right force balance of the positioning block 2; the fixed connection of the four reinforcing wing plates 7 to the double-layer drill body 1 enhances the structural strength of the connection between the positioning seat 3 and the double-layer drill body 1.

[0024] In this embodiment, two internal hex bolts 5 are threadedly connected to two threaded slots 9 respectively, two connecting blocks 12 are located inside two elastic cavities 10 respectively, two locking blocks 13 are slidably connected to the two elastic cavities 10 respectively, and the two locking blocks 13 are interlocked with the two locking slots 6 respectively.

[0025] Through the above scheme: the threaded connection between the two hexagonal socket bolts 5 and the two threaded slots 9 achieves a detachable rigid fixation between the positioning block 2 and the positioning seat 3, facilitating quick disassembly during maintenance; the two connecting blocks 12 are located inside the two elastic cavities 10 respectively, and the elastic cavities 10 effectively limit the movement of the connecting blocks 12, preventing them from shifting or coming out during the extension and retraction of the powerful spring 11, ensuring that the connecting blocks 12 can drive the locking blocks 13 to slide stably in the horizontal direction, ensuring the normal operation of the locking mechanism; the interlocking sliding connection between the two locking blocks 13 and the elastic cavities 10 provides a stable trajectory for the extension and retraction of the locking blocks 13, allowing them to smoothly retract into the elastic cavities 10 when the inclined plane 14 is subjected to force, and to pop out smoothly when the powerful spring 11 returns to its original position; and the interlocking engagement connection between the locking blocks 13 and the locking slots 6 is the key to achieving initial locking, providing a stable foundation for subsequent bolt reinforcement and improving installation efficiency.

[0026] It should be noted that this utility model is a double-layer tubular drill for large-diameter rotary drilling pile rock-embedded construction. During use, the connecting piece 8 is fixed on the output end of the rotary drilling rig. The positioning block 2 is aligned with the positioning cavity 4 opened at the upper end of the positioning seat 3, and the positioning block 2 is inserted downward into the positioning cavity 4 in the vertical direction. During this process, the lower pushing inclined surface 14 of the left and right lower locking blocks 13 inside the positioning block 2 first contacts the opening edge of the positioning cavity 4. As the positioning block 2 continues to move downward, the inner wall of the positioning cavity 4 generates a horizontal inward thrust on the pushing inclined surface 14. This thrust forces the two locking blocks 13 to move into their respective corresponding elastic cavities 10. Simultaneously, the locking block 13 compresses the strong spring 11 fixed inside the elastic cavity 10 through the connecting block 12, causing the strong spring 11 to be in a contracted and energy-storing state. When the positioning block 2 is fully inserted into the positioning cavity 4, the position of the positioning block 2 is perfectly matched with the positioning cavity 4. At this time, the two locking blocks 13 correspond exactly to the positions of the two locking slots 6 opened on the lower left and right sides of the positioning seat 3. After the strong spring 11 loses external pressure, it releases its stored energy and pushes the connecting block 12 through its elastic force to move the locking blocks 13 out of the elastic cavity 10, so that the two locking blocks 13 are respectively inserted into the two locking slots 6, completing the connection between the double-layer drill body 1 and the positioning seat. After initial positioning and locking, use an Allen wrench to screw the two Allen bolts 5, which are interlaced at the upper front and rear ends of the positioning seat 3, into the threaded slots 9 at the upper front and rear ends of the positioning block 2. This threaded connection achieves rigid reinforcement between the positioning block 2 and the positioning seat 3, forming a dual fixing structure of initial mechanical locking and bolt reinforcement. This ensures a stable connection during high-strength rock embedding construction, reduces bolt usage, and improves installation efficiency. When it is necessary to inspect, repair, or replace parts of the double-layer drill body 1 during construction, the operator first uses an Allen wrench to loosen the two Allen bolts 5 from the threaded slots. Unscrew the bolt from the inlet 9 to release the reinforcement of the positioning block 2 and the positioning seat 3; then press the two locking blocks 13 inward to compress the strong spring 11 and exit the locking slot 6, releasing the initial locking state; at this time, pull the double-layer drill body 1 vertically upward to separate the positioning seat 3 from the positioning block 2, realizing the disassembly of the double-layer drill body 1; after the maintenance work is completed, according to the above initial assembly process, insert the positioning block 2 vertically into the positioning cavity 4 to complete the initial locking, and screw in the internal hex bolt 5 for reinforcement, so that construction can be quickly resumed, reducing maintenance downtime and ensuring the continuity of construction.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A double-layer tubular drill for large-diameter rotary drilling pile rock-embedded construction, comprising a double-layer tubular drill body (1) and a positioning block (2), characterized in that: The upper middle part of the double-layer drill body (1) is fixedly connected to a positioning seat (3). The upper end of the positioning seat (3) is provided with a positioning cavity (4). The upper front and upper rear parts of the positioning seat (3) are both connected with internal hex bolts (5). The lower left and lower right parts of the positioning seat (3) are both provided with locking slots (6). The four outer corners of the positioning seat (3) are fixedly connected with reinforcing wing plates (7). The upper end of the positioning block (2) is fixedly connected with a connector (8). Both the upper front and upper rear ends are provided with threaded slots (9). The lower left and lower right inner parts of the positioning block (2) are provided with elastic cavities (10). The inner walls of the two elastic cavities (10) are fixedly connected with strong springs (11). The back sides of the two strong springs (11) are fixedly connected with connecting blocks (12). The back sides of the two connecting blocks (12) are fixedly connected with locking blocks (13). The lower part of the two locking blocks (13) is provided with a pushing slope (14).

2. The double-layer tubular drill for large-diameter rotary drilling pile rock-embedded construction according to claim 1, characterized in that: The positioning block (2) is engaged with the positioning cavity (4), and the two internal hex bolts (5) are symmetrically distributed front and back.

3. The double-layer tubular drill for rock-embedded construction of large-diameter rotary piles according to claim 1, characterized in that: The two locking slots (6) are symmetrically distributed from left to right, and both locking slots (6) are connected to the inside of the positioning cavity (4).

4. The double-layer tubular drill for rock-embedded construction of large-diameter rotary piles according to claim 1, characterized in that: The lower ends of the four reinforcing wing plates (7) are fixedly connected to the double-layer tubular drill body (1), and the upper end of the connector (8) is fixedly connected to the output end of the rotary drilling rig.

5. A double-layer tubular drill for rock-embedded construction of large-diameter rotary piles according to claim 1, characterized in that: The two internal hex bolts (5) are threaded to the two threaded slots (9) respectively, and the two connecting blocks (12) are located inside the two elastic cavities (10) respectively.

6. The double-layer tubular drill for rock-embedded construction of large-diameter rotary piles according to claim 1, characterized in that: The two locking blocks (13) are respectively slidably connected to the two elastic cavities (10), and the two locking blocks (13) are respectively engaged with the two locking slots (6).

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