Three-shaft mixer drill bit with conical bucket teeth

Abstract

The three-shaft stirrer drill bit comprises a drill rod, a connector is arranged at the upper end of the drill rod, a drilling head is arranged at the lower end of the drill rod, the drilling head comprises a cylindrical section and a conical section which are integrally formed, one end of the cylindrical section is fixedly connected with the drill rod, the conical section is arranged at the other end of the cylindrical section, and the conical section is arranged at the other end of the cylindrical section. A plurality of groups of diamond drill teeth are arranged on the peripheral wall of the cylindrical section of the drilling head along the circumferential direction; a plurality of blade tool rows are fixedly arranged on the peripheral wall of the end, close to the drilling head, of the drilling rod, and a plurality of conical bucket teeth are detachably arranged on the lower portion of each blade tool row at equal intervals. When drilling operation is carried out, the drill bit is matched with the blade tool row to synchronously crush a soil layer, particularly, the diamond drill teeth on the side portion of the drill bit and the conical bucket teeth at the bottom of the blade tool row can effectively act on a gravel layer, and the drilling efficiency of the drill bit of the three-shaft stirring machine in gravel and the gravel-containing soil layer is improved; the engineering construction cost is reduced, and the engineering quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of triaxial mixing pile construction technology, and in particular to a triaxial mixing machine drill bit with conical bucket teeth. Background Technology

[0002] Traditional cement-soil mixing piles are only suitable for treating normally consolidated silt and silty soil, silt, saturated loess, plain fill, cohesive soil, and saturated loose sand without groundwater. When encountering hard, complex gravel layers and gravel-containing soil layers, the existing multi-axis mixer drill bits have structural limitations, resulting in very slow drilling and cutting of the soil, increased cement consumption, and severe drill bit damage, leading to serious drill bit wear. When certain parts of the drill bit wear out, it is difficult to replace them, resulting in direct scrapping. Therefore, a triaxial mixer drill bit with conical bucket teeth was developed. Utility Model Content

[0003] The purpose of this invention is to provide a triaxial mixer drill bit with conical bucket teeth to solve the technical problems mentioned in the background section.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a triaxial mixer drill bit with conical teeth, comprising a drill rod, a connector at the upper end of the drill rod, and a drill head at the lower end. The drill head includes an integrally formed cylindrical section and a conical section. One end of the cylindrical section is fixedly connected to the drill rod, and the conical section is located at the other end of the cylindrical section. Multiple sets of diamond teeth are fixedly arranged circumferentially on the outer peripheral wall of the cylindrical section of the drill head. Multiple blade cutter rows are fixedly arranged on the outer peripheral wall of the drill rod near the drill head. Multiple conical teeth are detachably and evenly spaced on the lower part of each blade cutter row.

[0006] Furthermore, a plurality of triangular ribs are uniformly fixedly arranged circumferentially between the outer peripheral wall of the cylindrical section of the drill bit and the lower end of the drill rod. The plurality of diamond drill teeth in each group are uniformly spaced and fixedly arranged on the outer end face of the ribs, and the axis of each diamond drill tooth is perpendicular to the outer end face of the ribs.

[0007] Furthermore, the angle between each of the blade rows and the horizontal plane is 45°.

[0008] Furthermore, each of the blade rows is provided with a cutting edge at the end away from the drill rod.

[0009] Furthermore, a plurality of first connecting holes are evenly provided near the lower end of the blade blade row, and a second connecting hole is provided at the upper end of each of the conical bucket teeth. Each of the conical bucket teeth is fixedly connected to the blade blade row by connecting bolts that pass through the second connecting hole and the first connecting hole.

[0010] Furthermore, two sets of limiting grooves are symmetrically provided on both sides of the lower end of the blade row, and each of the first connecting holes is respectively opened between the two corresponding limiting grooves; two limiting bosses that are adapted to the limiting grooves are symmetrically fixedly provided on the upper end of the conical bucket teeth, and each of the second connecting holes is respectively opened on the limiting bosses.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] During drilling operations, this invention uses a drill bit and a blade cutter array to simultaneously break up the soil layer. In particular, the diamond drill teeth on the side of the drill bit and the conical bucket teeth at the bottom of the blade cutter array can effectively act on the gravel layer, improving the drilling efficiency of the triaxial mixer drill bit in gravel and gravel-containing soil layers, which helps to reduce engineering construction costs and improve engineering quality. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

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

[0015] Figure 2 This is a schematic diagram of the blade cutter array structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the conical bucket tooth structure of this utility model;

[0017] Explanation of reference numerals in the attached drawings: 1. Drill rod; 2. Connector; 3. Drill bit; 4. Diamond drill bit; 5. Rib plate; 6. Blade row; 7. Cutting edge; 8. Conical bucket tooth; 9. First connecting hole; 10. Second connecting hole; 11. Connecting bolt; 12. Limiting groove; 13. Limiting boss. Detailed Implementation

[0018] like Figure 1-Figure 3 As shown, a triaxial mixer drill bit with conical bucket teeth includes a drill rod 1, with a connector 2 at the upper end and a drill bit 3 at the lower end.

[0019] The drill bit 3 includes an integrally formed cylindrical section and a conical section. One end of the cylindrical section is fixedly connected to the drill rod 1, and the conical section is located at the other end of the cylindrical section. Multiple sets of diamond drill bits 4 are fixedly arranged circumferentially on the outer peripheral wall of the cylindrical section of the drill bit 3. Specifically, multiple triangular cross-section ribs 5 are uniformly fixedly arranged circumferentially between the outer peripheral wall of the cylindrical section of the drill bit 3 and the lower end of the drill rod 1. The multiple diamond drill bits 4 in each set are uniformly spaced and fixedly arranged on the outer end face of the ribs 5, and the axis of each diamond drill bit 4 is perpendicular to the outer end face of the ribs 5.

[0020] Multiple blade rows 6 are fixedly arranged on the outer peripheral wall of the drill rod 1 near the drill head 3. Each blade row 6 forms an angle of 45° with the horizontal plane, and each blade row 6 is provided with a cutting edge 7 at the end away from the drill rod 1.

[0021] Each blade cutter rack 6 has a plurality of conical bucket teeth 8 detachably mounted at evenly spaced intervals on its lower portion. In this embodiment, a plurality of first connecting holes 9 are evenly provided near the lower end of each blade cutter rack 6, and a second connecting hole 10 is provided at the upper end of each conical bucket tooth 8. Each conical bucket tooth 8 is fixedly connected to the blade cutter rack 6 by connecting bolts 11 passing through the second connecting hole 10 and the first connecting hole 9. Through the above arrangement, the conical bucket teeth and the blade cutter rack can be detachably fixedly connected, and when the main load-bearing component, the conical bucket teeth, wears, it can be disassembled and replaced.

[0022] Furthermore, as a further improvement to this utility model, two sets of limiting grooves 12 are symmetrically provided on both sides of the lower end of the blade row 6, and each of the first connecting holes 9 is respectively opened between the two opposing limiting grooves 12. Two limiting bosses 13, each adapted to the limiting grooves 12, are symmetrically fixedly provided on the upper end of the conical bucket teeth 8. Each of the second connecting holes 10 is respectively opened on the limiting bosses 13. The strong connection between the two limiting bosses 13 and the limiting grooves 12 on the blade row is ensured through the cooperation of the limiting bosses 13 and the limiting grooves 12 on the blade row.

[0023] During drilling operations, this invention uses a drill bit and a blade cutter array to simultaneously break up the soil layer. In particular, the diamond drill teeth on the side of the drill bit and the conical bucket teeth at the bottom of the blade cutter array can effectively act on the gravel layer, improving the drilling efficiency of the triaxial mixer drill bit in gravel and gravel-containing soil layers, which helps to reduce engineering construction costs and improve engineering quality.

[0024] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A triaxial mixer drill bit with conical bucket teeth, characterized in that: The system includes a drill rod, with a connector at the upper end and a drill head at the lower end. The drill head comprises an integrally formed cylindrical section and a conical section. One end of the cylindrical section is fixedly connected to the drill rod, and the conical section is located at the other end of the cylindrical section. Multiple sets of diamond drill teeth are fixedly arranged circumferentially on the outer peripheral wall of the cylindrical section of the drill head. Multiple blade cutter rows are fixedly arranged on the outer peripheral wall of the drill rod near the drill head. Each blade cutter row has multiple detachably arranged conical teeth evenly spaced at its lower part.

2. The triaxial mixer drill bit with conical bucket teeth according to claim 1, characterized in that: Multiple triangular ribs are uniformly fixed along the circumferential direction between the outer peripheral wall of the cylindrical section of the drill bit and the lower end of the drill rod. Multiple diamond drill teeth of each group are uniformly fixed on the outer end face of the ribs, and the axis of each diamond drill tooth is perpendicular to the outer end face of the rib.

3. The triaxial mixer drill bit with conical bucket teeth according to claim 1, characterized in that: Each of the blade rows forms a 45° angle with the horizontal plane.

4. The triaxial mixer drill bit with conical bucket teeth according to claim 3, characterized in that: Each blade array has a cutting edge at the end furthest from the drill rod.

5. The triaxial mixer drill bit with conical bucket teeth according to claim 1, characterized in that: The blade blades are provided with a plurality of first connecting holes evenly distributed near the lower end of the blade blades, and each of the conical bucket teeth is provided with a second connecting hole at the upper end of the blade blades. Each of the conical bucket teeth is fixedly connected to the blade blades by connecting bolts that pass through the second connecting hole and the first connecting hole.

6. The triaxial mixer drill bit with conical bucket teeth according to claim 5, characterized in that: Two sets of limiting grooves are symmetrically provided on both sides of the lower end of the blade blade row, and each of the first connecting holes is respectively opened between the two corresponding limiting grooves; two limiting bosses that are adapted to the limiting grooves are symmetrically fixedly provided on the upper end of the conical bucket teeth, and each of the second connecting holes is respectively opened on the limiting bosses.

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