Cement mixer drill bit
By using cast iron tips, cast iron blades and excavator bucket teeth structures in cement mixing pile drill bits, the problem of difficulty in cutting soil in traditional drill bits is solved, the long life and high-precision drilling of the drill bit structure are achieved, and the cement mixing efficiency is improved.
Patent Information
- Application Number
- CN202421626698.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-07-10
AI Technical Summary
During the construction of traditional cement mixing piles, it is difficult for drill bits to cut soil, which can easily cause drill rods to break and drill bit blades to bending, increasing construction costs and affecting construction quality.
A cement mixer drill bit is designed, which adopts cast iron tips, cast iron blades and excavator bucket teeth structures. The drill rod is driven to rotate through the transmission rod. The cast iron tips cooperate with the cast iron blades and excavator bucket teeth to drill, reducing the wear of cast iron tips and improving drilling accuracy.
It effectively reduces the wear of cast iron tips, improves the service life of the drill bit structure, avoids the inclination of the drill position, improves the drilling accuracy, and quickly stirs and mixes the cement slurry through the rotation of the cast iron blades, improving the cement mixing efficiency.
Smart Images
Figure CN222701920U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mixer drill bits, in particular to a cement mixer drill bit. Background Art
[0002] Cement-soil mixing piles are an effective form of soft foundation treatment. Cement-soil mixing piles use cement as the main agent of the curing agent. Cement is sprayed into the soil by a mixing pile machine and fully mixed, so that a series of physical and chemical reactions occur between the cement and the soil, hardening the soft soil and improving the foundation strength. Cement-soil mixing piles have the characteristics of small foundation settlement, fast construction speed, and high economic benefits. They are widely used in soft foundation treatment projects in China and abroad, and have outstanding advantages such as simple and fast construction and low cost.
[0003] In traditional cement mixing pile construction, when the drill bit sinks and rotates, the bottom drill bit cutting surface uses a full section to complete the soil cutting in one go, and the soil is mixed and loosened. The contact area of the cut soil is the projection area of the entire blade. The area is large and the resistance is large. In the construction of strata with low water content and high shear strength, it is difficult for the drill bit to cut the soil, which often causes drill rod breakage and drill bit blade bending, increasing construction costs. At the same time, the pile body is prone to tilt, affecting the construction quality.
[0004] Therefore, it is necessary to invent a cement mixer drill bit to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a cement mixer drill bit to solve the problems that the drill rod is often broken and the drill blade is bent, which increases the construction cost and easily causes the pile body to tilt, thus affecting the construction quality.
[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cement mixer drill bit, comprising a transmission rod, the lower end of the transmission rod is connected to a drill bit structure, the drill bit structure comprises a drill rod, a cast iron tip, a second connecting sleeve, a cast iron blade and an excavator bucket tooth, the upper end of the drill rod is fixedly connected to a first abutment plate, the upper end of the first abutment plate is fixedly connected to a plug-in rod, the lower end of the transmission rod is fixedly connected to a first connecting sleeve, the interior of the first connecting sleeve is provided with a plug-in groove, and the plug-in rod is plugged into the interior of the plug-in groove.
[0007] By adopting the above technical solution, the driving mechanism drives the drill rod to rotate through the transmission rod, and the drill rod drives the cast iron tip, cast iron blades and excavator bucket teeth to rotate, the cast iron tip drills the soil, and the cast iron blades and excavator bucket teeth assist in drilling, thereby reducing the pressure on the cast iron tip, thereby reducing the wear of the cast iron tip and increasing the service life of the drill bit structure. At the same time, the cast iron blades and excavator bucket teeth assist in supporting the two sides of the cast iron tip to avoid tilting of the drilling position and improve drilling accuracy. In addition, during the grouting process, the cast iron blades on both sides rotate to effectively stir the slurry, so that the slurry is quickly stirred and mixed, thereby improving the cement mixing efficiency.
[0008] Optionally, a spiral blade is fixedly connected to the side of the transmission rod, and a first grouting hole is opened inside the transmission rod.
[0009] By adopting the above technical solution, the spiral blade is used to discharge the soil produced by the drilling upward. The first grouting hole is used to inject grout into the pile pit.
[0010] Optionally, a first threaded hole is formed on a side of the plug-in rod, a first connecting hole is formed on a side of the first connecting sleeve, a fixing screw is provided inside the first connecting hole, and the fixing screw passes through the first connecting hole and is threadedly connected to the first threaded hole.
[0011] By adopting the above technical solution, the plug-in rod is inserted into the plug-in slot, and then the fixing screw is passed through the first connecting hole and threadedly connected with the first threaded hole to fix the drill rod and the transmission rod.
[0012] Optionally, a second grouting hole is provided inside the drill rod and the connecting rod, and a grout outlet hole is provided on the surface of the drill rod near the lower end.
[0013] By adopting the above technical solution, the slurry flows into the interior of the second grouting hole through the first grouting hole, and then is discharged to the outside through the slurry outlet hole at the lower end.
[0014] Optionally, a second abutment plate is fixedly connected to the middle position of the surface of the drill rod, a second connecting hole is opened on the surface of the second abutment plate, a fixing screw is arranged inside the second connecting hole, the second connecting sleeve is sleeved on the surface of the drill rod, a third threaded hole is opened on the surface of the second connecting sleeve, and the fixing screw passes through the second connecting hole and is threadedly connected to the third threaded hole.
[0015] Optionally, the cast iron blade is fixed to the surface of the second connecting sleeve by welding, and the excavator bucket tooth is fixed to an end of the cast iron blade away from the second connecting sleeve by welding.
[0016] By adopting the above technical solution, the second connecting sleeve is set on the surface of the drill pipe, and then the fixing screw is passed through the second connecting hole and threadedly connected with the third threaded hole, the second connecting sleeve is fixed to the second abutment plate, and then the cast iron blades and excavator bucket teeth are fixed to the side of the drill pipe. At the same time, they are connected by screws, which facilitates the replacement of damaged cast iron blades and excavator bucket teeth.
[0017] Optionally, a positioning plate is fixedly connected to the lower end of the drill rod, a positioning groove is provided inside the positioning plate, and a second threaded hole is provided on a side of the positioning groove.
[0018] Optionally, the cast iron tip is inserted into the interior of the positioning groove, a third connecting hole is opened on the side of the cast iron tip, the internal thread of the second threaded hole is connected with a fixing screw, and the middle part of the fixing screw passes through the third connecting hole.
[0019] By adopting the above technical solution, the cast iron tip is clamped inside the positioning groove, and then the fixing screw is threadedly connected to the second threaded hole, and the fixing screw is passed through the third connecting hole to fix the cast iron tip to the lower end of the drill rod. At the same time, the connection is made by screws. When the cast iron tip is damaged but the drill rod is not damaged, the cast iron tip can be replaced.
[0020] In the above technical solution, the technical effects and advantages provided by the utility model are:
[0021] 1. The utility model uses a cast iron tip to drill the soil, and cast iron blades and excavator bucket teeth assist in drilling, thereby reducing the pressure on the cast iron tip, thereby reducing the wear of the cast iron tip and increasing the service life of the drill bit structure. At the same time, the cast iron blades and excavator bucket teeth assist in supporting both sides of the cast iron tip, thereby avoiding the tilting of the drilling position and improving the drilling accuracy. This solves the problem that the drill rod is often broken and the drill blade is bent, which increases the construction cost, and the pile body is prone to tilt, which affects the construction quality.
[0022] 2. In the grouting process, the drill rod drives the cast iron blades on both sides to rotate, and the slurry is discharged outward through the slurry outlet holes. During the discharge process, the cast iron blades effectively stir the slurry, so that the slurry is quickly stirred and mixed, thereby improving the cement mixing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0024] Figure 2 It is a schematic diagram of the transmission rod structure of the utility model;
[0025] Figure 3 This is a schematic diagram of the drill rod structure of the utility model;
[0026] Figure 4 This is a schematic diagram of the cast iron tip structure of the utility model;
[0027] Figure 5 This is a schematic diagram of the cast iron blade structure of the utility model.
[0028] Description of reference numerals:
[0029] 1. Transmission rod; 11. Spiral blade; 12. First grouting hole; 13. First connecting sleeve; 14. First connecting hole; 15. Plug-in groove; 2. Drill rod; 21. First abutment plate; 22. Plug-in rod; 23. Second grouting hole; 24. First threaded hole; 25. Second abutment plate; 26. Second connecting hole; 27. Slurry outlet hole; 28. Positioning plate; 29. Positioning groove; 210. Second threaded hole; 3. Cast iron tip; 31. Third connecting hole; 4. Second connecting sleeve; 41. Third threaded hole; 42. Cast iron blade; 43. Excavator bucket tooth. DETAILED DESCRIPTION
[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0031] The utility model provides Figures 1 to 3 The cement mixer drill bit shown in the figure comprises a transmission rod 1, the lower end of the transmission rod 1 is connected to a drill bit structure, the drill bit structure comprises a drill rod 2, a cast iron tip 3, a second connecting sleeve 4, a cast iron blade 42 and an excavator bucket tooth 43, the upper end of the drill rod 2 is fixedly connected to a first abutment plate 21, the upper end of the first abutment plate 21 is fixedly connected to a plug-in rod 22, the lower end of the transmission rod 1 is fixedly connected to a first connecting sleeve 13, the interior of the first connecting sleeve 13 is provided with a plug-in groove 15, and the plug-in rod 22 is plugged into the inner part of the plug-in groove 15. A spiral blade 11 is fixedly connected to the side of the transmission rod 1, a first grouting hole 12 is opened inside the transmission rod 1, a second grouting hole 23 is opened inside the drill rod 2 and the plug-in rod 22, a slurry outlet hole 27 is opened on the surface of the drill rod 2 near the lower end, a first threaded hole 24 is opened on the side of the plug-in rod 22, a first connecting hole 14 is opened on the side of the first connecting sleeve 13, a fixing screw is arranged inside the first connecting hole 14, and the fixing screw passes through the first connecting hole 14 and is threadedly connected with the first threaded hole 24.
[0032] During use, the pile driver is first positioned, centered, and leveled. After the mixing pile is placed, the pile driver is moved to the designated pile position, centered, and leveled (with a level). The verticality of the guide frame is then adjusted, and the verticality of the guide frame is controlled in both directions using a theodolite or plumb bob. The slurry is then pre-mixed, and while the deep mixer is pre-mixed and sinking, cement slurry is mixed in the background, and the slurry is placed in the aggregate hopper before grouting. The slurry is then mixed and sunk, and the turntable of the deep mixing pile driver is started. After the speed of the mixing head is normal, the drill rod 2 can be sunk and stirred along the guide frame. The slurry is then sprayed, mixed, and lifted. After sinking to the designed depth, the slurry is started. Start the mortar pump and deliver the slurry to the slurry outlet of the mixing head through the pipeline. After the slurry is discharged, start the pile mixing machine and tighten the chain device, and lift the drill rod 2 while spraying and stirring at the lifting speed determined by the design to fully mix the slurry and soil; then repeat the stirring and sinking, lift the stirring drill bit to above the pile top, turn off the mortar pump, and repeat the stirring and sinking to the designed depth. The sinking speed is carried out according to the design requirements; then spray the slurry, stir and lift it repeatedly, and after sinking to the designed depth, spray the slurry, stir and lift it repeatedly until it reaches the ground; finally, the pile driver moves, and after constructing one pile, move the pile driver to the next pile position, and repeat the above steps to construct the next pile.
[0033] See also Figures 3 to 5 A second abutment plate 25 is fixedly connected to the middle position of the surface of the drill rod 2, a second connection hole 26 is opened on the surface of the second abutment plate 25, a fixing screw is arranged inside the second connection hole 26, a second connection sleeve 4 is sleeved on the surface of the drill rod 2, a third threaded hole 41 is opened on the surface of the second connection sleeve 4, the fixing screw passes through the second connection hole 26 and is threadedly connected with the third threaded hole 41, the cast iron blade 42 is welded and fixed to the surface of the second connection sleeve 4, the excavator bucket tooth 43 is welded and fixed to the end of the cast iron blade 42 away from the second connection sleeve 4, a positioning plate 28 is fixedly connected to the lower end of the drill rod 2, a positioning groove 29 is opened inside the positioning plate 28, a second threaded hole 210 is opened on the side of the positioning groove 29, the cast iron tip 3 is inserted into the inside of the positioning groove 29, a third connection hole 31 is opened on the side of the cast iron tip 3, the inside of the second threaded hole 210 is threadedly connected with a fixing screw, and the middle of the fixing screw passes through the third connection hole 31.
[0034] Specifically, the pile driver drives the drill rod 2 to rotate through the transmission rod 1, and the drill rod 2 drives the cast iron tip 3 at the lower end to rotate, and at the same time drives the cast iron blade 42 on the side to rotate through the second connecting sleeve 4, and the cast iron blade 42 drives the excavator bucket tooth 43 to rotate, and cooperates with the cast iron tip 3 to drill the soil, thereby reducing the pressure on the cast iron tip 3, thereby reducing the wear of the cast iron tip 3 and increasing the service life of the drill bit structure. At the same time, the cast iron blade 42 and the excavator bucket tooth 43 assist in supporting both sides of the cast iron tip 3 to avoid tilting of the drilling position and improve drilling accuracy.
[0035] At the same time, during the grouting process, the slurry is discharged outward through the slurry outlet hole 27, and the drill rod 2 drives the cast iron blades 42 on both sides to rotate. During the discharge process, the cast iron blades 42 effectively stir the slurry, so that the slurry is quickly stirred and mixed, thereby improving the cement mixing efficiency.
[0036] In addition, during the process of replacing the drill bit structure, the fixing screws in the first connecting hole 14 are removed, and then the drill bit structure is removed as a whole. When the cast iron tip 3, the cast iron blade 42 or the excavator bucket tooth 43 are damaged, the fixing screws inside the second connecting hole 26 and the third connecting hole 31 are removed, and then the cast iron tip 3 and the second connecting sleeve 4 are removed, so as to facilitate the replacement of the drill rod 2, the cast iron tip 3 or the cast iron blade 42 and the excavator bucket tooth 43.
[0037] Working principle of the utility model: the cast iron blades 42 reduce the pressure on the cast iron tip 3, thereby reducing the wear of the cast iron tip 3 and increasing the service life of the drill bit structure. At the same time, the cast iron blades 42 and the excavator bucket teeth 43 provide auxiliary support on both sides of the cast iron tip 3 to avoid tilting of the drilling position and improve drilling accuracy. The cast iron blades 42 fully stir and mix the discharged slurry, thereby improving the slurry stirring and mixing efficiency.
[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the utility model, and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A cement mixer drill bit, comprising a transmission rod (1), characterized in that: The lower end of the transmission rod (1) is connected to a drill bit structure, the drill bit structure comprising a drill rod (2), a cast iron tip (3), a second connecting sleeve (4), a cast iron blade (42) and an excavator bucket tooth (43); the upper end of the drill rod (2) is fixedly connected to a first abutment plate (21); the upper end of the first abutment plate (21) is fixedly connected to a plug-in rod (22); the lower end of the transmission rod (1) is fixedly connected to a first connecting sleeve (13); a plug-in groove (15) is provided inside the first connecting sleeve (13); the plug-in rod (22) is plugged into the plug-in groove (15).
2. A cement mixer drill bit according to claim 1, characterized in that: A spiral blade (11) is fixedly connected to the side surface of the transmission rod (1), and a first grouting hole (12) is provided inside the transmission rod (1).
3. A cement mixer drill bit according to claim 1, characterized in that: A first threaded hole (24) is formed on the side of the plug-in rod (22), a first connecting hole (14) is formed on the side of the first connecting sleeve (13), a fixing screw is provided inside the first connecting hole (14), and the fixing screw passes through the first connecting hole (14) and is threadedly connected to the first threaded hole (24).
4. A cement mixer drill bit according to claim 1, characterized in that: A second grouting hole (23) is provided inside the drill rod (2) and the plug rod (22), and a grouting hole (27) is provided on the surface of the drill rod (2) near the lower end.
5. A cement mixer drill bit according to claim 1, characterized in that: A second abutment plate (25) is fixedly connected to the middle of the surface of the drill rod (2); a second connection hole (26) is provided on the surface of the second abutment plate (25); a fixing screw is provided inside the second connection hole (26); the second connection sleeve (4) is sleeved on the surface of the drill rod (2); a third threaded hole (41) is provided on the surface of the second connection sleeve (4); the fixing screw passes through the second connection hole (26) and is threadedly connected to the third threaded hole (41).
6. A cement mixer drill bit according to claim 5, characterized in that: The cast iron blade (42) is welded and fixed to the surface of the second connecting sleeve (4), and the excavator bucket tooth (43) is welded and fixed to an end of the cast iron blade (42) away from the second connecting sleeve (4).
7. A cement mixer drill bit according to claim 1, characterized in that: A positioning plate (28) is fixedly connected to the lower end of the drill rod (2), a positioning groove (29) is provided inside the positioning plate (28), and a second threaded hole (210) is provided on the side of the positioning groove (29).
8. A cement mixer drill bit according to claim 7, characterized in that: The cast iron tip (3) is inserted into the interior of the positioning groove (29), a third connection hole (31) is provided on the side of the cast iron tip (3), the interior of the second threaded hole (210) is threadedly connected to a fixing screw, and the middle portion of the fixing screw passes through the third connection hole (31).