Mixing drill bit of bidirectional mutual mixing device for construction bite mixing pile
By incorporating multiple inner and outer mixing blades and a circular sleeve structure into the mixing drill bit, the problem of drill bit deviation in existing technologies has been solved, thereby improving mixing uniformity and water-stopping effect and increasing construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAXING TECH (ZHEJIANG) CO LTD
- Filing Date
- 2025-09-16
- Publication Date
- 2026-07-07
AI Technical Summary
Existing bidirectional mixing drill bits are prone to deviation when constructing interlocking mixing piles, affecting construction speed and water-stopping effect.
The device employs a bidirectional mixing mechanism consisting of multiple inner and outer mixing blades, combined with a circular sleeve and drill tooth structure to ensure accurate positioning and prevent deviation. Meanwhile, through holes are provided on the sleeve wall to ensure uniform mixing and water-stopping effect.
This method ensures uniform mixing and accurate positioning during construction, significantly improving the water-stopping effect and construction efficiency of the interlocking mixing piles.
Smart Images
Figure CN224469085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pile foundation construction technology, specifically a mixing drill bit for a bidirectional mixing device used in the construction of interlocking mixing piles. Background Technology
[0002] The existing cement-soil mixing pile is simply called a mixing pile. The construction machine for mixing piles is relatively mature. During the construction process, the winch drives the power head up and down, and the power head drives the drill rod to rotate. On one hand, cement slurry is sprayed out through the slurry pipe in the drill rod and the nozzle on the mixing drill head. On the other hand, the mixing drill head drills down and stirs the cement soil. After the cement slurry solidifies, it becomes a mixing pile.
[0003] The drill rods of existing pile drivers have evolved from unidirectional rotation to bidirectional rotation of the inner and outer drill rods; and the mixing drill bits of existing pile drivers have evolved from unidirectional rotation and bidirectional rotation of the upper and lower mixing blades to bidirectional mixing drill bits with the inner blades and the mixing frame with the outer blades fixed in the same height range.
[0004] However, in actual construction, the existing bidirectional mixing drill bit still has a significant drawback: it is prone to deviation. This is especially true when the bidirectional mixing drill bit is used for the construction of interlocking mixing piles in diaphragm walls, or for the construction of enlarged heads at the top of mixing piles where adjacent enlarged heads need to interlock with each other. The deviation phenomenon is particularly serious, which severely affects the construction speed and efficiency, as well as the water-stopping effect of the interlocking mixing pile. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a mixing drill bit for a bidirectional mixing device used in the construction of interlocking mixing piles, which can ensure uniform mixing and good pile quality, and effectively prevent the mixing from deviating during drilling.
[0006] The technical solution of this utility model is to provide a mixing drill bit for a bidirectional mixing device for constructing interlocking mixing piles, including multiple inner mixing blades fixed to the inner drill rod, multiple outer mixing blades forming bidirectional mixing with the inner mixing blades, and a drill bit body fixed to the bottom end of the inner drill rod; the mixing drill bit also includes a circular sleeve, with multiple first drill teeth arranged along the circumference at the bottom end of the sleeve, the sleeve being fixed to the outer drill rod via a connecting plate, and the multiple outer mixing blades being fixed on the inner wall of the sleeve.
[0007] With the above structure, the mixing drill bit of the bidirectional mixing device for constructing interlocking mixing piles of this utility model has the following advantages:
[0008] This bidirectional mixing drill bit can be simply referred to as a bidirectional mixing drum drill. The drum drill first positions itself and breaks through the soil, accurately positioning itself from the moment it contacts the ground without deviating. Throughout the entire process of drilling, circumferential cutting, and mixing, it remains accurately positioned without deviation. During the construction of interlocking mixing piles for diaphragm walls, it can well meet the design requirements, with excellent interlocking and effectively ensuring a superior water-stopping effect.
[0009] Furthermore, the drill bit body includes a centrally positioned drill tip, and two symmetrically arranged drill bit body stirring blades are fixed on the inner drill rod above the drill tip. Each drill bit body stirring blade has multiple second drill teeth on one or both sides. With the above structure, both central positioning and circumferential positioning of the sleeve are achieved, further ensuring accurate positioning throughout the entire drilling and circumferential stirring process without deviation. The anti-deviation and excellent water-stopping technology are even more prominent.
[0010] Furthermore, the sleeve wall is provided with one or more through holes. With the above structure, compared to the sleeve which is only vented from top to bottom and has a completely closed outer wall, a relatively sealed space will not be formed, which may affect the fullness and uniformity of mixing to some extent. This further ensures the technical effect of not deviating, having good water-stopping effect, and uniform mixing.
[0011] Furthermore, multiple through holes are evenly distributed along the circumference. This structure further ensures the technical effect of preventing deviation, providing good water-stopping effect, and achieving uniform mixing.
[0012] Furthermore, the through holes are vertical oblong holes, each with a height accounting for 1 / 2 to 2 / 3 of the sleeve height, and a width that is 1 / 9 to 1 / 6 of the unfolded width of the circular sleeve. With this structure, the circular sleeve approximates a circular frame, resulting in a more pronounced technical effect. It prevents deviation, ensures good water-stopping performance, and allows for more thorough and uniform mixing, achieving a harmonious balance and significantly improving the water-stopping effect and bearing capacity of the interlocking mixing piles in the diaphragm wall. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the preferred embodiment of the stirring drill bit of this utility model. Figure 1 .
[0014] Figure 2 This is a schematic diagram of the preferred embodiment of the stirring drill bit of this utility model. Figure 2 .
[0015] Figure 3 yes Figure 1 A schematic diagram of the structure remaining after the sleeve, connecting plate, and first drill bit are exploded.
[0016] Figure 4 yes Figure 1A schematic diagram of the exploded structure of the sleeve, which is connected to the connecting plate and part of the first drill bit.
[0017] Figure 5 yes Figure 3 A structural diagram from another angle.
[0018] Figure 6 This is a schematic diagram of the external structure of the bidirectional stirring power head of the stirring drill bit of this utility model, which is connected by the inner drill rod and the outer drill rod of the drilling machine.
[0019] Figure 7 yes Figure 6 Structural diagram omitting the power head housing Figure 1 .
[0020] Figure 8 yes Figure 6 Structural diagram omitting the power head housing Figure 2 .
[0021] As shown in the figure:
[0022] 11. Inner drill rod, 111. Inner drill rod connector, 12. Inner mixing blade, 13. Drill bit body, 131. Drill tip, 132. Drill bit body mixing blade, 133. Second drill tooth, 14. Grouting pipe, 15. Grouting pipe connector.
[0023] 21. Sleeve; 211. First drill tooth; 212. Connecting plate; 2121. Connecting ring; 2122. Connecting straight plate; 22. Outer drill rod; 221. Outer drill rod connector; 23. Outer stirring blade; 24. Through hole.
[0024] 3. Power head; 31. Power head housing; 32. Internal drill rod motor; 33. Internal drill rod gearbox; 34. Internal drill rod drive gear; 35. Internal drill rod driven gear; 36. External drill rod motor; 37. External drill rod gearbox; 38. External drill rod drive gear; 39. External drill rod driven gear; 310. Drill rig internal drill rod; 311. Drill rig external drill rod. Detailed Implementation
[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 ,Figure 7 and Figure 8 As shown.
[0027] The preferred embodiment of the mixing drill bit of the bidirectional mixing device for constructing interlocking mixing piles of this utility model includes multiple inner mixing blades 12 fixed to the inner drill rod 11, multiple outer mixing blades 23 forming bidirectional mixing with the inner mixing blades 12, and a drill bit body 13 fixed to the bottom end of the inner drill rod 11.
[0028] A preferred embodiment of the mixing drill bit for a bidirectional mixing device used in the construction of interlocking mixing piles of this utility model further includes a circular sleeve 21. Multiple first drill teeth 211 are arranged along the circumference of the bottom end of the sleeve 21. The sleeve 21 is fixed to the outer drill rod 22 via a connecting plate 212. The connecting plate 212 can be a central connecting ring 2121 fitted and fixed (e.g., welded) to the outer drill rod 22, and can have three connecting straight plates 2122 evenly distributed along the circumference. One end of each connecting straight plate 2122 is integral with the connecting ring 2121, and the other end is fixed to the inner wall of the sleeve 21 (e.g., welded). The included angle between the width bisectors of adjacent connecting straight plates 2122 can be 120° to each other. The multiple outer mixing blades 23 are fixed to the inner wall of the sleeve 21.
[0029] The drill bit body 13 includes a drill tip 131 for center positioning, such as the drill tip 131 of a triangular plate. Two symmetrically arranged drill bit body stirring blades 132 are fixed on the inner drill rod 11 above the drill tip 131. Each drill bit body stirring blade 132 has multiple second drill teeth 133 on one or both sides. The drill bit body 13 is fixed to the bottom end of the inner drill rod 11. A horizontal grouting pipe 14 can be installed on the inner drill rod 11 above the drill tip 131. The grouting nozzle of the grouting pipe 14 is connected to a grout delivery pipe located inside the inner drill rod 11. It is easy to understand that the grout delivery pipe inside the inner drill rod 11 can be connected to a grout source located on the ground via a grouting pipe connector 15 at the top of the inner drill rod of the drilling rig.
[0030] The drill body 13 is also called the drill bit. The drill teeth, such as the first drill tooth 211 and the second drill tooth 133, can be cutting teeth or alloy tooth blocks.
[0031] The sleeve 21 may have one or more through holes 24 on its sleeve wall. Multiple holes include two or more, such as three or four.
[0032] Multiple through holes 24 can be evenly distributed along the circumference.
[0033] The through hole 24 can be a vertical oblong hole, the height of each vertical oblong hole can be 1 / 2 to 2 / 3 of the height of the sleeve 21, and the width of each vertical oblong hole can be 1 / 9 to 1 / 6 of the unfolded width of the circular sleeve 21.
[0034] The specific structure of the inner stirring blades 12 and outer stirring blades 23 can be as follows: The inner drill rod 11 is fixed with multiple inner stirring blades 12, such as two or three vertical rows, with two blades per row, totaling four or six blades. The upper end of the inner wall of the sleeve 21 is fixed with six to nine outer stirring blades, which interact with the three rows of inner stirring blades 12, with two or three blades per row. The inner stirring blades 12 and outer stirring blades 23 are staggered in height and interact bidirectionally. Bidirectional means that if the inner stirring blades 12 rotate clockwise, the outer stirring blades 23 rotate counterclockwise, and vice versa. The two or three rows of inner stirring blades 12 can be evenly distributed along the circumference, and the three rows of outer stirring blades 23 can also be evenly distributed along the circumference. For example, the angle between the width bisectors of two adjacent inner stirring blades 12 can be 180° or 120°, and the angle between the width bisectors of two adjacent outer stirring blades 23 can be 120°. Both the inner stirring blade 12 and the outer stirring blade 23 can be transverse or horizontal stirring blades.
[0035] For ease of distinction, the inner drill rod 11 of this utility model can be referred to as the inner drill rod of the drill bit, and the outer drill rod 12 can be referred to as the outer drill rod of the drill bit. The inner drill rod on the drilling rig described below is called the inner drill rod 310 of the drilling rig, and the outer drill rod on the drilling rig described below is called the outer drill rod 311 of the drilling rig.
[0036] It is easy to understand that the inner drill rod 11 of this utility model's stirring drill bit is connected to the bottom end of the inner drill rod 310 of the drilling machine via the inner drill rod connector 111 at the top. If the inner drill rod connector 111 is a regular hexagonal prism, and the bottom end of the inner drill rod 310 is a regular hexagonal hole, the regular hexagonal prism and the regular hexagonal hole are fitted together and secured by a pair of horizontal pins. The top end of the inner drill rod 310 is connected to the power head 3. Similarly, the outer drill rod 12 of this utility model's stirring drill bit is connected to the bottom end of the outer drill rod 311 of the drilling machine via the outer drill rod connector 221 at the top. If the outer drill rod connector 221 is a regular hexagonal prism, and the bottom end of the outer drill rod 311 is a regular hexagonal hole, the regular hexagonal prism and the regular hexagonal hole are fitted together and secured by a pair of horizontal pins. The top end of the outer drill rod 311 is connected to the power head 3. The horizontal pins are also called insertion pins.
[0037] The specific structure of the power head 3 and the connection between the upper end of the inner drill rod 310 and the upper end of the outer drill rod 311 of the drilling rig and the power head 3 can be as follows: The inner drill rod motor 32 and the outer drill rod motor 36, each with its own gearbox, are vertically and parallelly fixed inside the power head housing 31. The inner drill rod drive gear 34, coaxially fixed on the output shaft of the inner drill rod gearbox 33, meshes horizontally with the inner drill rod driven gear 35, coaxially fixed on the top of the inner drill rod 310. The outer drill rod drive gear 38, coaxially fixed on the output shaft of the outer drill rod gearbox 37, meshes horizontally with the outer drill rod driven gear 39, coaxially fixed on the top of the outer drill rod 311. Relatively speaking, the outer drill rod driven gear 39 and the outer drill rod drive gear 38 are at the bottom, and the inner drill rod driven gear 35 and the inner drill rod drive gear 34 are at the top.
[0038] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any inconsistency between the drawings and the text description, or between the drawings themselves, the text description shall prevail.
[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A mixing drill bit for a bidirectional mixing device used in constructing interlocking mixing piles, comprising multiple inner mixing blades fixed to an inner drill rod, multiple outer mixing blades forming a bidirectional mixing action with the inner mixing blades, and a drill bit body fixed to the bottom end of the inner drill rod; characterized in that: It also includes a circular sleeve with multiple first drill teeth arranged around the bottom of the sleeve. The sleeve is fixed to the outer drill rod via a connecting plate, and the multiple outer stirring blades are fixed to the inner wall of the sleeve.
2. The mixing drill bit for a bidirectional mixing device for constructing interlocking mixing piles according to claim 1, characterized in that: The drill bit body includes a centrally positioned drill tip, and two symmetrically arranged drill bit body stirring blades are fixed on the inner drill rod above the drill tip. Each drill bit body stirring blade has multiple second drill teeth on one or both sides.
3. The mixing drill bit for a bidirectional mixing device for constructing interlocking mixing piles according to claim 1, characterized in that: The sleeve has one or more through holes on its sleeve wall.
4. The mixing drill bit of the bidirectional mixing device for constructing interlocking mixing piles according to claim 3, characterized in that: Multiple through holes are evenly distributed along the circumference.
5. The mixing drill bit of the bidirectional mixing device for constructing interlocking mixing piles according to claim 3, characterized in that: The through holes are vertical oblong holes, with the height of each vertical oblong hole accounting for 1 / 2 to 2 / 3 of the sleeve height, and the width of each vertical oblong hole being 1 / 9 to 1 / 6 of the unfolded width of the circular sleeve.