Rotary excavating drill bit for complex karst cave geology

Abstract

The utility model provides a rotary excavating drill bit for complex karst cave geology, which relates to the field of rotary excavating drills and comprises a soil drilling bucket, a plurality of cutting bucket teeth arranged on the lower surface of the soil drilling bucket, a spiral drill bit movably arranged inside the soil drilling bucket, a hydraulic cylinder fixedly arranged at the top of the inner wall of the soil drilling bucket, and a connector fixedly connected with the output end of the hydraulic cylinder. The top end of the spiral drill bit is located in the connector, and a pressure sensor is arranged between the upper surface of the spiral drill bit and the inner wall of the connector. According to the scheme, the hydraulic cylinder is started to be matched with the connector to control the spiral drill bit to extend to the bottom of the soil drilling bucket, drilling operation is conducted along with rotation of the soil drilling bucket, the drilling pressure of the spiral drill bit is sensed through the pressure sensor, and the hydraulic cylinder is controlled to adjust the extending position of the spiral drill bit; the spiral drill bit can adapt to drilling of the hard rock stratum in the complex karst cave geology, meanwhile, the abrasion speed of the cutting bucket teeth can be reduced, and the construction efficiency of the spiral drill bit is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of rotary drilling, and in particular to a rotary drilling bit for complex geological conditions such as karst caves. Background Technology

[0002] During borehole drilling operations, geological conditions containing karst caves may be encountered. These conditions are characterized by cavities, unevenly distributed weak interlayers, and groundwater flow. Such geological conditions can pose significant challenges to construction projects. Therefore, rotary drilling bits specifically designed for complex karst cave geological conditions are typically required to address the hard rock layers, cavities, and uneven strata encountered within the caves.

[0003] In related technologies, drilling operations in complex geological conditions such as karst caves are mainly carried out using rotary drilling bits. Due to the hard rock layers that may be encountered during drilling operations in complex geological conditions such as karst caves, rotary drilling bits usually need to have the characteristics of high strength, wear resistance and strong adaptability. However, rotary drilling bits are mainly composed of a drilling bucket and several cutting teeth installed at the bottom of the drilling bucket. During the drilling operation of rotary drilling bits, the cutting teeth may be worn quickly when encountering hard rock layers, which requires frequent replacement of the drill bit, and may reduce construction efficiency.

[0004] Therefore, it is necessary to provide a rotary drilling bit for complex geological conditions such as karst caves to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the technical problem that the cutting teeth may wear out rapidly when encountering hard rock layers, requiring frequent drill bit replacements and potentially reducing construction efficiency, this invention provides a rotary drilling bit for complex geological conditions such as karst caves.

[0006] This utility model provides a rotary drilling bit for complex geological conditions in karst caves, comprising: a drilling bucket, the lower surface of which is provided with multiple cutting teeth, a spiral drill bit movably disposed inside the drilling bucket, a hydraulic cylinder fixedly disposed on the top of the inner wall of the drilling bucket, the output end of the hydraulic cylinder being fixedly connected to a connector, the top end of the spiral drill bit being located inside the connector, and a pressure sensor being disposed between the upper surface of the spiral drill bit and the inner wall of the connector.

[0007] Preferably, a limiting tube is fixedly connected to the inner wall of the drilling bucket, and the auger drill bit, the hydraulic cylinder and the connector are all located inside the limiting tube.

[0008] Preferably, the auger drill bit includes a drill rod located inside the drilling bucket, an mounting plate fixedly connected to the upper end face of the drill rod, the mounting plate being located inside the connector, the pressure sensor being located on the upper surface of the mounting plate, a drill cone fixedly connected to the lower end face of the drill rod, and an auger blade fixedly connected to the outer wall of the drill rod.

[0009] Preferably, the inner wall of the connector is uniformly fixedly connected with a plurality of guide posts, and the mounting plate is uniformly provided with a plurality of guide holes through which the mounting plate passes, with each guide post corresponding to pass through the interior of each guide hole.

[0010] Preferably, a protective ring is fixedly connected to the outer wall of the drill pipe, the protective ring is located below the connector, and a storage groove is cut around the outer wall of the protective ring, the inside of the storage groove is filled with sealing filler.

[0011] Preferably, a plurality of triangular reinforcing blocks are uniformly and fixedly connected to the outer wall of the drill rod, and the upper surface of the triangular reinforcing blocks is fixedly connected to the lower surface of the protective ring.

[0012] Compared with related technologies, the rotary drilling bit for complex geological conditions in karst caves provided by this utility model has the following beneficial effects:

[0013] 1. This rotary drilling bit for complex geological conditions in karst caves can adapt to drilling into hard rock layers in such conditions. The drill bucket restricts the installation position of multiple cutting teeth, and a spiral drill bit is installed inside the drill bucket via a hydraulic cylinder and connector. Activating the hydraulic cylinder and connector controls the spiral drill bit to move down to the bottom of the drill bucket and perform drilling operations as the drill bucket rotates. A pressure sensor can sense the drilling pressure of the spiral drill bit, and the hydraulic cylinder can be controlled to adjust the extension position of the spiral drill bit based on the pressure. This allows the spiral drill bit to adapt to drilling into hard rock layers in complex geological conditions in karst caves, while also reducing the wear rate of the cutting teeth, shortening the frequency of drill bit replacement, and ensuring the construction efficiency of this application.

[0014] 2. This rotary drilling bit, used in complex geological conditions such as karst caves, features a limiting tube that provides protection for the auger bit, hydraulic cylinder, and connector. The mounting plate restricts the installation position of the drill rod, which in turn restricts the installation position of the drill cone and auger blade. The drill cone and auger blade work together to enhance drilling efficiency. The guide post and guide hole work together to guide the movement of the mounting plate and restrict its position inside the connector, thus enhancing the stability of the mounting plate during use.

[0015] 3. This rotary drilling bit, used in complex geological conditions such as karst caves, restricts the installation position of the sealing filler through the storage groove on the protective ring. The sealing filler enhances the sealing effect between the protective ring and the inner wall of the limiting tube, thereby preventing foreign objects from entering the hydraulic cylinder from the bottom of the limiting tube and providing a certain degree of protection for the hydraulic cylinder. The triangular reinforcing block enhances the stability of the connection between the drill rod and the protective ring, and also improves the stability of the drill rod during rotation. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a rotary drilling bit for complex geological conditions in karst caves provided by this utility model;

[0017] Figure 2 A cross-sectional structural schematic diagram of a rotary drilling bit for complex geological conditions in karst caves provided by this utility model;

[0018] Figure 3 This utility model provides a rotary drilling bit for complex geological conditions such as karst caves. Figure 2 A magnified schematic diagram of the structure at point A in the diagram.

[0019] The following are the labels in the diagram: 1. Drill bucket; 2. Cutting bucket teeth; 3. Spiral drill bit; 301. Drill rod; 302. Mounting plate; 303. Drill cone; 304. Spiral blade; 4. Hydraulic cylinder; 5. Connector; 6. Pressure sensor; 7. Guide post; 8. Guide hole; 9. Limiting tube; 10. Protective ring; 11. Storage trough; 12. Sealing filler; 13. Triangular reinforcing block. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figures 1 to 3 A rotary drilling bit for complex geological conditions in karst caves includes: a drilling bucket 1, with multiple cutting teeth 2 on the lower surface of the drilling bucket 1; a spiral drill bit 3 movably disposed inside the drilling bucket 1; a hydraulic cylinder 4 fixedly disposed on the top of the inner wall of the drilling bucket 1; a connector 5 fixedly connected to the output end of the hydraulic cylinder 4; the top end of the spiral drill bit 3 located inside the connector 5; and a pressure sensor 6 disposed between the upper surface of the spiral drill bit 3 and the inner wall of the connector 5.

[0022] In practical implementation, the top of the drilling bucket 1 in this rotary drilling bit for complex karst geology can be connected to the rotating rod of the rotary machine. Multiple cutting teeth 2 are provided on the lower surface of the drilling bucket 1. When the drilling bucket 1 is rotated by the rotating rod, the multiple cutting teeth 2 can drill holes in the construction area. Furthermore, a connector 5 is installed inside the drilling bucket 1 via a hydraulic cylinder 4. The connector 5 can restrict the installation position of the auger drill bit 3. Specifically, activating the hydraulic cylinder 4 in conjunction with the connector 5 can control the up-and-down movement of the auger drill bit 3. When the auger bit 3 moves down, it can be stored inside the drilling bucket 1. When the auger bit 3 moves down, it can extend to the bottom of the drilling bucket 1 and follow the rotation of the drilling bucket 1 to carry out drilling operations. While drilling with the auger bit 3, the pressure sensor 6 can sense the drilling pressure of the auger bit 3. According to the pressure, the hydraulic cylinder 4 can be controlled to adjust the extension position of the auger bit 3. The auger bit 3 can be used to adapt to drilling hard rock layers in complex geological conditions such as karst caves. At the same time, it can also reduce the wear rate of the cutting bucket teeth 2, shorten the frequency of drill bit replacement, and ensure the construction efficiency of this application.

[0023] refer to Figure 2 As shown, a limiting tube 9 is fixedly connected to the inner wall of the drilling bucket 1, and the auger drill bit 3, hydraulic cylinder 4 and connector 5 are all located inside the limiting tube 9.

[0024] In the specific implementation process, the installation position of the auger drill bit 3, hydraulic cylinder 4 and connector 5 can be restricted by the limiting tube 9. At the same time, it can also play a certain protective role for the auger drill bit 3, hydraulic cylinder 4 and connector 5 to prevent foreign objects inside the drilling bucket 1 from touching and damaging the hydraulic cylinder 4.

[0025] refer to Figure 1 , Figure 2 and Figure 3 As shown, the auger drill bit 3 includes a drill rod 301 located inside the drilling bucket 1. An mounting plate 302 is fixedly connected to the upper end face of the drill rod 301. The mounting plate 302 is located inside the connector 5. A pressure sensor 6 is located on the upper surface of the mounting plate 302. A drill cone 303 is fixedly connected to the lower end face of the drill rod 301. An auger blade 304 is fixedly connected to the outer wall of the drill rod 301.

[0026] In the specific implementation process, the installation position of the drill rod 301 can be restricted by the mounting plate 302, and the installation position of the drill cone 303 and the spiral blade 304 can be restricted by the drill rod 301. When drilling with the spiral drill bit 3, the drilling effect can be enhanced by the cooperation of the drill cone 303 and the spiral blade 304. At the same time, the mounting plate 302 can press against the pressure sensor 6, and the pressure sensor 6 can detect the drilling pressure.

[0027] refer to Figure 3As shown, multiple guide posts 7 are uniformly fixedly connected to the inner wall of the connector 5, and multiple guide holes 8 are uniformly opened on the mounting plate 302 to penetrate the mounting plate 302. Each guide post 7 passes through the interior of each guide hole 8.

[0028] In the specific implementation process, the guide post 7 and the guide hole 8 cooperate to guide the movement of the mounting plate 302, and at the same time restrict the position of the mounting plate 302 inside the connector 5, thereby enhancing the stability of the mounting plate 302 during use.

[0029] refer to Figure 2 and Figure 3 As shown, a protective ring 10 is fixedly connected to the outer wall of the drill pipe 301. The protective ring 10 is located below the connector 5. A storage groove 11 is cut around the outer wall of the protective ring 10. A sealing filler 12 is provided inside the storage groove 11.

[0030] In the specific implementation process, the sealing filler 12 is installed in the storage groove 11 opened on the protective ring 10. The sealing filler 12 can enhance the sealing effect between the sealing filler and the inner wall of the limiting tube 9, thereby preventing foreign objects from entering the hydraulic cylinder 4 from the bottom of the limiting tube 9, and playing a certain protective role for the hydraulic cylinder 4.

[0031] refer to Figure 2 As shown, multiple triangular reinforcing blocks 13 are uniformly fixedly connected to the outer wall of the drill pipe 301, and the upper surface of the triangular reinforcing blocks 13 is fixedly connected to the lower surface of the protective ring 10.

[0032] In the specific implementation process, multiple triangular reinforcing blocks 13 are arranged in a circle and supported between the outer wall of the drill rod 301 and the lower surface of the protective ring 10, thereby enhancing the stability of the connection between the drill rod 301 and the protective ring 10, and also improving the stability of the drill rod 301 when rotating.

[0033] The working principle of the rotary drilling bit for complex geological conditions such as karst caves provided by this utility model is as follows:

[0034] In use, the drilling bucket 1 is installed at the bottom of the rotating rod of the rotator. The rotating rod controls the rotation of the drilling bucket 1, and the multiple cutting teeth 2 at the bottom of the drilling bucket 1 drill holes in the construction area. The auger drill bit 3 is installed inside the drilling bucket 1 through the hydraulic cylinder 4 and the connecting head 5. The limiting tube 9 provides a certain degree of protection for the auger drill bit 3, the hydraulic cylinder 4, and the connecting head 5. The hydraulic cylinder 4 is activated to control the auger drill bit 3 to move down and extend to the bottom of the drilling bucket 1, and to perform drilling operations as the drilling bucket 1 rotates. The drilling is carried out by the drill cone 303 and the auger drill bit 3. The rotating blade 304 enhances the drilling effect, and the guide post 7 and guide hole 8 guide the movement of the mounting plate 302. While the auger bit 3 is drilling, the mounting plate 302 presses the pressure sensor 6, which senses the drilling pressure of the auger bit 3. Based on the pressure, the hydraulic cylinder 4 is controlled to adjust the extension position of the auger bit 3. This allows the auger bit 3 to adapt to drilling in hard rock layers in complex geological conditions such as karst caves. At the same time, it can reduce the wear rate of the cutting teeth 2, shorten the frequency of drill bit replacement, and ensure the construction efficiency of this application.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rotary drilling bit for complex geological conditions such as karst caves, characterized in that, include: A soil drilling bucket (1) is provided with a plurality of cutting teeth (2) on its lower surface; The auger bit (3) is movably disposed inside the soil hopper (1); and A hydraulic cylinder (4) is fixedly installed on the top of the inner wall of the drilling bucket (1). The output end of the hydraulic cylinder (4) is fixedly connected to a connector (5). The top end of the auger drill bit (3) is located inside the connector (5). A pressure sensor (6) is provided between the upper surface of the auger drill bit (3) and the inner wall of the connector (5).

2. The rotary drilling bit for complex geological conditions such as karst caves according to claim 1, characterized in that, The inner wall of the drilling bucket (1) is fixedly connected to a limiting tube (9), and the spiral drill bit (3), the hydraulic cylinder (4) and the connector (5) are all located inside the limiting tube (9).

3. A rotary drilling bit for complex geological conditions such as karst caves according to claim 1, characterized in that, The auger drill bit (3) includes a drill rod (301) located inside the drilling bucket (1). An mounting plate (302) is fixedly connected to the upper end face of the drill rod (301). The mounting plate (302) is located inside the connector (5). The pressure sensor (6) is located on the upper surface of the mounting plate (302). A drill cone (303) is fixedly connected to the lower end face of the drill rod (301). A auger blade (304) is fixedly connected to the outer wall of the drill rod (301).

4. A rotary drilling bit for complex geological conditions such as karst caves according to claim 3, characterized in that, The inner wall of the connector (5) is uniformly fixed with a plurality of guide posts (7), and the mounting plate (302) is uniformly provided with a plurality of guide holes (8) that pass through the mounting plate (302), and each guide post (7) passes through the interior of each guide hole (8).

5. A rotary drilling bit for complex geological conditions such as karst caves according to claim 3, characterized in that, A protective ring (10) is fixedly connected to the outer wall of the drill rod (301). The protective ring (10) is located below the connector (5). The outer wall of the protective ring (10) is circumferentially cut with a storage groove (11). The storage groove (11) is filled with sealing filler (12).

6. A rotary drilling bit for complex geological conditions such as karst caves according to claim 5, characterized in that, The outer wall of the drill rod (301) is uniformly and fixedly connected with a plurality of triangular reinforcing blocks (13), and the upper surface of the triangular reinforcing blocks (13) is fixedly connected to the lower surface of the protective ring (10).

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