Two-way intermixing device for construction expanding head and pile driver
By designing a combined bidirectional stirring device, accurate construction and efficient reinforcement of the enlarged head are achieved, solving the problems of high mechanical failure rate and unsatisfactory reinforcement effect in the existing technology, and significantly improving the compressive and shear resistance of the enlarged head.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO ZHUANGTAI CONSTR CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies for constructing enlarged heads suffer from problems such as high mechanical failure rates, uncertainty in the shape and size of the enlarged heads, and insufficient compressive and shear resistance, resulting in unsatisfactory reinforcement effects for soft soil foundation settlement.
A combined bidirectional mixing device is adopted, including an enlarged head mixing head and a multi-fan mixing frame. The accurate construction of the enlarged head is achieved through bidirectional rotating inner and outer mixing blades. Combined with a conventional grouting mechanism, the regularity and strength of the enlarged head are ensured.
It improves the construction stability and reliability of the enlarged head, ensures the accuracy of the shape and size of the enlarged head, significantly enhances the compressive and shear resistance, and improves the reinforcement effect of preventing settlement of soft soil foundations.
Smart Images
Figure CN224532636U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of equipment for construction mixing piles, specifically a bidirectional mixing device for a construction enlarged head and a pile driver. Background Technology
[0002] The existing cement-soil mixing pile is simply called a mixing pile. The pile driver for mixing piles is relatively mature. During construction, the hoisting equipment drives the power head to rotate and drill through the mixing drill bit to stir the soil. At the same time, cement slurry is sprayed out through the slurry pipe in the drill rod and the nozzle on the mixing drill bit. After the cement slurry solidifies, it becomes a mixing pile.
[0003] Existing drill rod technology has evolved from unidirectional rotation to bidirectional rotation of the inner and outer drill rods; while existing mixing drill bits have evolved from unidirectional rotation and bidirectional rotation of the upper and lower mixing blades to bidirectional mixing drill bits composed of inner blades and a mixing frame with fixed outer blades in the same height range.
[0004] In existing technologies, the reinforcement of large-area soft soil foundations, such as soft soil subgrades of highways and high-grade roads, soft soil foundations of airport runways, and soft soil foundations of urban plazas, uses different equipment for settlement prevention and reinforcement, but each has its own shortcomings:
[0005] In the early stages, ordinary pile drivers were used to construct multiple mixing piles, such as 10-24 meters deep and 500mm-1000mm in diameter, which were arranged at intervals to form an anti-settlement structure for soft soil foundations. However, the disadvantages were obvious. If the density was too low, the settlement between the gaps would be uneven, and the anti-settlement reinforcement effect would be unsatisfactory. If the density was too high, too many mixing piles would be needed, the cost would be too high, and there would be too much waste of materials.
[0006] Later, some technicians used bidirectional mixing drill bits to construct mixing piles, and simultaneously used high-pressure jet grouting devices to enlarge one or more large-diameter sections. However, the high-pressure pressurization equipment has very high sealing requirements, and the pressure is difficult to stabilize. The diameter and regularity of the large-diameter section of the jet grouting are difficult to control accurately. In particular, because soil collapse is prone to occur when the upper jet grouting enlarges the head, it is impossible to set the enlarged head at the upper end of each mixing pile. Therefore, it is still difficult to achieve the intended reinforcement effect of preventing soft soil foundation settlement.
[0007] Some technicians use a mixing drill bit that rotates forward to determine the diameter of the mixing pile, and reverses to determine the enlarged diameter, to construct mixing piles with a T-shaped enlarged head at the top. Compared to existing technologies, this improves the amount of work, construction time, construction speed, and foundation treatment costs. However, this type of pile driver is prone to mechanical failures, and there is a possibility that the mixing blades may not enlarge due to cement sticking to the soil or encountering obstacles such as rocks. This means there is uncertainty regarding the presence, shape, and size of the enlarged head, making it difficult to guarantee the reliability, stability, and accuracy of the construction process. Furthermore, the T-shaped enlarged head, with its right-angle transition to the mixing pile, has significantly insufficient compressive and shear strength, resulting in an unsatisfactory anti-settlement reinforcement effect. Utility Model Content
[0008] One technical problem this utility model aims to solve is to provide a bidirectional mixing device for constructing an enlarged head, which has a simple structure, stable and reliable construction process, and low failure rate. The combined bidirectional mixing device can construct the top enlarged head, ensuring that the diameter of the constructed enlarged head is accurate and regular, and that the compressive and shear resistance of the enlarged head is greatly enhanced, resulting in a significant reinforcement effect against settlement of soft soil foundations.
[0009] One technical solution of this utility model is to provide a bidirectional mixing device for a construction enlargement head, including a mixing head of the enlargement head; multiple frames with fixed outer mixing blades forming a mixing frame of the mixing head of the enlargement head: the multiple frames are distributed circumferentially, the inner end of the upper horizontal plate of each frame is fixed to the lower end of the first outer drill rod, the outer end of the upper horizontal plate is fixed to the upper end of the vertical plate, the lower end of the vertical plate is fixed to the upper end of the inclined plate, the lower end of the inclined plate is fixed to the lower connecting sleeve, the lower connecting sleeve is rotatably engaged with the lower end of the first inner drill rod, multiple inner mixing blades are fixed on the first inner drill rod, the inner mixing blades and the outer mixing blades are staggered in height and mix towards each other; the upper ends of the first outer drill rod and the upper ends of the first inner drill rod are both connected to the first power head.
[0010] With the above structure, the bidirectional stirring device of the construction enlargement head of this utility model has the following advantages:
[0011] This bidirectional mixing device constructs an enlarged head and a frustum transition section connecting the enlarged head and the mixing pile. It has small physical and mechanical errors, requires only a conventional rather than a high-pressure grouting mechanism, and has a low failure rate of grouting and mixing head. The construction process is reliable, stable, and accurate, ensuring that the shape and size of the enlarged head are regular and accurate, allowing the complete and regular enlarged head to be accurately placed at the top of each mixing pile. Furthermore, the compressive and shear resistance of the enlarged head and the frustum transition section are significantly improved, resulting in a remarkable technical effect in the reinforcement treatment to prevent settlement of soft soil foundations.
[0012] Because the expansion head and the mixing pile produced by the combined bidirectional mixing device of this apparatus are connected by a frustum transition section, its compressive strength and shear strength are greatly improved.
[0013] This bidirectional mixing device for the enlarged head can be used to construct the enlarged head towards the pile core while the mixing pile is still solidifying. Alternatively, a passageway can be installed on the power head through another drill rod, using a pipe with an inner hole as the inner drill rod. A separate power head, another outer drill rod passing through the inner drill rod, and another inner drill rod connected to the mixing pile mixing head allow the enlarged head to be bidirectionally mixed twice, through the enlarged head mixing head and the mixing pile mixing head. This results in good uniformity of pile mixing, which can relatively reduce cement consumption and significantly improve the pile quality of the enlarged head, thus enhancing the significant technical effect of reinforcement treatment to prevent settlement of soft soil foundations.
[0014] Furthermore, the three frame blades are evenly distributed along the circumference; each frame blade has a transverse outer mixing blade on its vertical plate and an upward-facing oblique outer mixing blade on its inclined plate; the first inner drill rod has three sets of inner mixing blades, each set consisting of three blades, that interact with the two outer mixing blades of each frame blade. With this structure, the bidirectional mixing of the upper enlarged head improves the uniformity of the mixing, relatively reducing cement consumption and significantly improving the pile quality of the enlarged head, further enhancing its compressive and shear resistance.
[0015] Furthermore, each frame also includes a lower horizontal plate, the outer end of which is fixed to the lower end of the inclined plate, and the inner end of which is fixed to the lower connecting sleeve. The diameter and slope of the frustum transition section are more reasonable, which can further improve the compressive and shear resistance of the enlarged head.
[0016] Furthermore, the power head has a passageway for another external drill rod to pass through, and the first inner drill rod has an inner hole for another external drill rod to slide into. With the above structure, another external drill rod, such as a third external drill rod, can pass through the power head, such as the first power head. A third inner drill rod can also be rotatably fitted inside the third external drill rod. The upper ends of the third external drill rod and the third inner drill rod can be connected to the third power head, and a mixing head for a mixing pile is installed at the lower ends of the third external drill rod and the third inner drill rod. That is, the above structure leaves room for the construction of a combined bidirectional mixing device, which can be assembled to form a mixing pile with an enlarged head for one-time construction, thus ensuring good uniformity of pile mixing. This can relatively reduce cement consumption and significantly improve the pile quality of the enlarged head and the mixing pile, further enhancing the significant technical effect of reinforcement treatment to prevent settlement of soft soil foundations.
[0017] Another technical problem to be solved by this utility model is to provide a pile driver that can continuously construct a mixing pile and an enlarged head on one pile driver. It has a simple structure, a stable and reliable construction process, a low failure rate, and the mixing pile with the enlarged head can ensure that the diameter of the enlarged head is accurate and regular. Its compressive strength, shear strength and bearing capacity are greatly enhanced, and the reinforcement effect of preventing settlement of soft soil foundation is significant.
[0018] Another technical solution of this utility model is to provide a pile driver, including a first tower set at the end of a construction platform, a first power head slidably fitted on the first tower, the first power head being connected to a first wire rope of a winch mechanism; the first power head being connected to the upper end of the first outer drill rod and the upper end of the first inner drill rod, and the lower ends of the first outer drill rod and the first inner drill rod being connected to the mixing head of the enlarged head; the pile driver also includes a second tower set parallel to the end of the construction platform, a second power head slidably fitted on the second tower, the second power head being connected to a second wire rope of the winch mechanism, and the second power head being connected to the mixing head of the mixing pile via a second outer drill rod and a second inner drill rod.
[0019] With the above structure, this piling machine has the following advantages:
[0020] This piling machine can be used to construct a mixing pile to a predetermined depth, and before the mixing pile has solidified, it can be moved laterally so that the center of the drill bit is aligned with the center of the already constructed mixing pile to construct the enlarged head. It can continuously construct a mixing pile and the enlarged head at the top on one piling machine.
[0021] This piling machine constructs an enlarged head and a frustum transition section connecting the enlarged head and the mixing pile. Its physical and mechanical errors are small, requiring only a conventional, rather than high-pressure, grouting mechanism. The failure rate of the grouting and mixing head is low, and the construction process is reliable, stable, and accurate. This ensures the enlarged head has a regular shape and accurate dimensions, allowing the complete and regular enlarged head to be accurately positioned at the top of each mixing pile. Furthermore, the compressive and shear strength of the enlarged head and the frustum transition section are significantly improved, resulting in a remarkable technical effect in reinforcing soft soil foundations to prevent settlement.
[0022] Because the enlarged head produced by this pile driver and the mixing pile are connected by a frustum transition section, its compressive strength and shear strength are greatly improved.
[0023] This pile driver enables the enlarged head to be mixed twice in both directions by the mixing head of the mixing pile and the mixing head of the enlarged head, resulting in good uniformity of the pile mixing. This not only reduces cement consumption but also significantly improves the pile quality of the enlarged head, further enhancing the remarkable technical effect of reinforcement treatment to prevent settlement of soft soil foundations. Attached Figure Description
[0024] Figure 1This is a schematic diagram of a preferred embodiment of the bidirectional stirring device for the construction enlargement head of this utility model (several bolts and nuts are omitted).
[0025] Figure 2 yes Figure 1 A magnified schematic diagram of the stirring head of the medium-sized head.
[0026] Figure 3 yes Figure 1 A schematic diagram of the first power head after omitting the shell and part of the support.
[0027] Figure 4 yes Figure 1 A schematic diagram of the bidirectional mixing device installed on the pile driver.
[0028] Figure 5 This is a structural schematic diagram of a preferred embodiment of the piling machine of this utility model.
[0029] Figure 6 yes Figure 5 A magnified structural diagram of A in the middle.
[0030] Figure 7 yes Figure 5 A schematic diagram of a mixing pile with enlarged heads in a soft soil foundation anti-settlement reinforcement structure constructed by a piling machine (showing the structure where the enlarged heads are tangent to each other).
[0031] As shown in the figure:
[0032] 1. Piling machine; 11. Traveling mechanism; 12. Construction platform; 131. First tower; 132. Second tower; 14. Winch mechanism; 15. Operator's cab; 16. First piling machine; 17. Second piling machine;
[0033] 21. Agitator head of enlarged head; 211. Agitator frame; 2111. Outer agitator blade; 2112. Frame; 21121. Upper horizontal plate; 21122. Upper connecting sleeve; 21123. Vertical plate; 21124. Inclined plate; 21125. Lower horizontal plate; 21126. Lower connecting sleeve; 22. First outer drill rod; 23. Inner agitator blade; 24. First inner drill rod; 241. Inner hole;
[0034] 31. Mixing head of the mixing pile; 32. Second outer drill rod; 33. Second inner drill rod; 34. Second power head;
[0035] 4. Drill bit; 41. Drill tip; 42. Drill bit body; 43. Drill bit mixing blades; 44. Grout nozzle;
[0036] 5. First power head; 51. First power head housing; 52. First inner drill rod motor; 53. First inner drill rod gearbox; 54. First inner drill rod drive gear; 55. First inner drill rod driven gear; 56. First outer drill rod motor; 57. First outer drill rod gearbox; 58. First outer drill rod drive gear; 59. First outer drill rod driven gear; 510. Third outer drill rod passage.
[0037] 61. Enlarged head; 62. Frustum transition section; 63. Mixing pile. Detailed Implementation
[0038] 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.
[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown.
[0040] A preferred embodiment of the bidirectional stirring device for the enlarged head of this utility model includes a stirring head of the enlarged head; multiple frames 2112 with external stirring blades 2111 fixed to them constitute the stirring frame 211 of the stirring head 21 of the enlarged head: the multiple frames 2112 are distributed circumferentially, the inner end of the upper horizontal plate 21121 of each frame 2112 is fixed to the lower end of the first outer drill rod 22, the outer end of the upper horizontal plate 21121 is fixed to the upper end of the vertical plate 21123, the lower end of the vertical plate 21123 is fixed to the upper end of the inclined plate 21124, the lower end of the inclined plate 21124 is fixed to the lower connecting sleeve 21126, the lower connecting sleeve 21126 is rotatably engaged with the lower end of the first inner drill rod 24, and multiple inner stirring blades 23 are fixed on the first inner drill rod 24, the inner stirring blades 23 and the outer stirring blades 2111 are staggered in height and stir each other in opposite directions. The upper ends of the first outer drill rod 22 and the first inner drill rod 24 are both connected to the first power head 5. The inner end of the upper horizontal plate 21121 of each frame 2112 is fixed to the lower end of the first outer drill rod 22, which can be achieved by an upper connecting sleeve 21122 or an upper connecting ring fixed to the lower end of the first outer drill rod 22. The inner end of each upper horizontal plate 21121 is fixed to the upper connecting sleeve 21122. Alternatively, the upper connecting sleeve can be omitted, and the inner end of each upper horizontal plate can be directly fixed to the first outer drill rod 22.
[0041] The above "can be the upper connecting sleeve 21122 or the upper connecting ring fixed to the lower end of the first outer drill rod 22" means "can be the upper connecting sleeve 21122 fixed to the lower end of the first outer drill rod 22, and the upper connecting sleeve 21122 is also called the upper connecting ring".
[0042] Multiple panels, such as three panels 2112, can be evenly distributed along the circumference. Each panel 2112 has an outer stirring blade 2111 fixed to its inner side on the vertical plate 21123 (e.g., a transverse outer stirring blade), and an outer stirring blade 2111 fixed to its inner side on the inclined plate 21124 (e.g., an upward-sloping outer stirring blade). The first inner drill rod 24 has three sets of inner stirring blades 23 that interact with the two outer stirring blades 2111 of each panel 2112. Each set consists of three blades, and all three blades in each set are transverse stirring blades, and all three blades in each set are on the same vertical line. Multiple panels include two or more panels, such as the three panels mentioned above, or two or four panels.
[0043] Preferably, each frame 2112 also includes a lower horizontal plate 21125, the outer end of which is fixed to the lower end of the inclined plate 21124, and the inner end of which is fixed to the lower connecting sleeve 21126. Of course, the lower horizontal plate can be omitted and the lower end of the inclined plate can be directly fixed to the lower connecting sleeve.
[0044] The specific structure of the first power head 5 and the specific structure connecting the upper ends of the first inner drill rod 24 and the upper ends of the first outer drill rod 22 to the first power head 5 can be as follows: the lower ends of the first inner drill rod motor 52 and the first outer drill rod motor 56, each with its own gearbox, are vertically and parallelly fixed inside the first power head housing 51. The first inner drill rod drive gear 54, coaxially fixed on the output shaft of the first inner drill rod gearbox 53, meshes horizontally with the first inner drill rod driven gear 55, coaxially fixed on the upper end of the first inner drill rod 24. The first outer drill rod drive gear 58, coaxially fixed on the output shaft of the first outer drill rod gearbox 57, meshes horizontally with the first outer drill rod driven gear 59, coaxially fixed on the upper end of the first upper outer drill rod 22. Relatively speaking, the first outer drill rod driven gear 59 and the first outer drill rod drive gear 58 are at the bottom, and the first inner drill rod driven gear 55 and the first inner drill rod drive gear 54 are at the top.
[0045] The power head, such as the first power head 5, may have a passageway for another external drill rod, such as a third external drill rod, to pass through; this can be called the third external drill rod passageway 510. The first internal drill rod 24 may have an internal hole 241 that slides with the third external drill rod. The passageway is also called a channel. The third external drill rod passageway 510 can be... Figure 1 The circular through hole shown in the cover plate can also be a perforation on the cover plate.
[0046] Another external drill rod, such as a third external drill rod, can pass through the third external drill rod passage 510 on the first power head. The third external drill rod can slide and engage with the inner hole 241 of the first inner drill rod 24. A third inner drill rod can also be rotatably engaged inside the third external drill rod. The upper ends of both the third external drill rod and the third inner drill rod can be connected to the third power head, and the lower ends of both the third external drill rod and the third inner drill rod can be equipped with a mixing head, such as a third mixing head. Since the third power head, the third external drill rod, the third inner drill rod, and the third mixing head are not within the protection scope of this utility model, they will not be described in detail.
[0047] like Figure 4 As shown, the bidirectional mixing device of the enlarged head can be installed alone on a pile driver 1, such as the first pile driver 16. For construction of mixing piles with enlarged heads, two pile drivers 1 can be used, one of which is a conventional pile driver 1 equipped with a bidirectional mixing device, such as... Figure 5 The pile driver 17 shown omits the first tower, first power head, first outer drill rod, first inner drill rod, and enlarged head mixing head on the left. The other one is... Figure 4 The piling machine 16 shown is equipped with a bidirectional mixing device and a construction enlargement head. First, a mixing pile 63 is constructed using a piling machine of existing technology. Then, before the cement and soil of the mixing pile 63 have solidified, a... Figure 4 The pile driver 16 is used to align the mixing head 21 of the enlarged head with the core of the mixing pile 63, and then the enlarged head 61 at the top of the mixing pile is constructed.
[0048] Existing pile drivers for mixing and mixing piles may include a traveling mechanism 11, a construction platform 12, a tower or column, a winch mechanism 14, and an operator's cab 15. The tower of this utility model pile driver includes a first tower 131 and a second tower 132.
[0049] A preferred embodiment of this utility model's pile driver includes a first tower 131 located at the end of a construction platform 12. A first power head 5 is slidably fitted on the first tower 131 and connected to a first wire rope of a winch mechanism 14. The first power head 5 is connected to the upper ends of the first outer drill rod 22 and the first inner drill rod 24, as described above. The lower ends of both the first outer drill rod 22 and the first inner drill rod 24 are connected to the mixing head 21 of the enlarged head. The pile driver 17 also includes a second tower 132 arranged parallel to each other at the end of the construction platform 12. A second power head 34 is slidably fitted on the second tower 132 and connected to a second wire rope of the winch mechanism 14. The second power head 34 is connected to the mixing head 31 of the mixing pile via a second outer drill rod 32 and a second inner drill rod 33.
[0050] In a preferred embodiment of the combined bidirectional stirring device of this utility model, a grout delivery pipe fixed inside the second inner drill rod 33 may be included. The upper end of the grout delivery pipe may have a connector for connecting to the grout inlet pipe. The grout inlet pipe is connected to a grout pump and a grout pool located on the ground. The lower end of the grout delivery pipe may be connected to multiple grout injection ports 44 located on the drill bit cylinder 42 of the drill bit 4.
[0051] The drill bit 4 can be located at the bottom end of the second inner drill rod 33 below the mixing head 31 of the mixing pile. The drill bit 4 may include the lowest drill tip 41, such as a triangular plate drill tip 41, the drill bit body 42 at the upper end of the drill tip 41, and drill bit mixing blades 43 symmetrically arranged on both sides of the drill bit body 42.
[0052] It is not difficult to understand that the invention of this utility model pile driver lies in the following: the pile driver 17 also includes a second tower 132 that is parallel to and arranged at the end of the construction platform 12 relative to the first tower 131. A second power head 34 is slidably fitted on the second tower 132. The second power head 34 is connected to the second wire rope of the winch mechanism 14. The second power head 34 is connected to the mixing head 31 of the mixing pile through the second outer drill rod 32 and the second inner drill rod 33.
[0053] The specific structures of the second tower 132, the second power head 34, the second outer drill rod 32, the second inner drill rod 33, the mixing head 31 of the mixing pile, and their interconnection and positional relationships are all existing technologies of bidirectional mixing devices and will not be described further here.
[0054] The fixing of the upper horizontal plate 21121, vertical plate 21123, inclined plate 21124 and lower horizontal plate 21125 of the frame 2112 described above can be made by bending a long strip plate to form the frame 2112. The corners can be arc-shaped transitions, and the corners between the hinged enlarged head 61 and the frustum transition section 62 can be arc-shaped.
[0055] The fixing described above can be achieved by using multiple bolts or by welding.
[0056] In this piling machine, the first power head 5 is individually connected to and driven by the wire rope of the winch mechanism 14, and is vertically slidably fitted on the first tower 131 of the piling machine 17. The second power head 34 is individually connected to and driven by the wire rope of the winch mechanism 14, and is vertically slidably fitted on the second tower 132 of the piling machine 17.
[0057] The piling machine 17 can first construct a mixing pile 63 to a predetermined depth. Before the mixing pile 63 solidifies, the piling machine 17 is moved laterally so that the center of the drill bit 4 is aligned with the center of the constructed mixing pile 63, and then the enlarged head 61 is constructed. The enlarged head 61 and the mixing pile 63 form a frustum transition section 62. The frustum transition section 62 can also be called a truncated cone transition section or a truncated cone transition surface. During the reinforcement treatment to prevent settlement of soft soil foundations, adjacent enlarged heads are left with gaps between each other, or adjacent enlarged heads 61 are tangent to each other, or adjacent enlarged heads interlock with each other.
[0058] It is easy to understand that the piling machine 1 can also be called a drilling rig, a mixing drilling rig, or a mixing drilling equipment. The piling machine 1 may also include a control device within the operator's cab 15. The air pump and electromagnetic reversing valve of the cylinder of the traveling mechanism 11, the winch of the hoisting mechanism 14, the first inner drill rod motor 52, the first outer drill rod motor 56, the second inner drill rod motor, and the second outer drill rod motor are all electrically connected to and driven by the control device, such as a main controller or computer. Vertical plate 21123 is also called a vertical plate. Multiple pieces are also called multiple blocks. Multiple pieces include two or more pieces. Frame 2112 is also called a frame leaf. Multiple leaves include two or more leaves, such as two, three, or four leaves. Gearbox is also called a transmission, a reduction gearbox, or a reducer. Coaxial fixing means coaxial axis fixing.
[0059] 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.
[0060] 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 bidirectional stirring device for a construction enlargement head, characterized in that: The device includes an enlarged head and a mixing head; multiple frames with fixed outer mixing blades form the mixing frame of the enlarged head: the multiple frames are distributed circumferentially, the inner end of the upper horizontal plate of each frame is fixed to the lower end of the first outer drill rod, the outer end of the upper horizontal plate is fixed to the upper end of the vertical plate, the lower end of the vertical plate is fixed to the upper end of the inclined plate, the lower end of the inclined plate is fixed to the lower connecting sleeve, the lower connecting sleeve is rotatably engaged with the lower end of the first inner drill rod, multiple inner mixing blades are fixed on the first inner drill rod, the inner mixing blades and outer mixing blades are staggered in height and stir each other in opposite directions; the upper ends of the first outer drill rod and the upper ends of the first inner drill rod are both connected to the first power head; this bidirectional stirring device constructs the enlarged head and the frustum transition section connecting the enlarged head and the mixing pile.
2. The bidirectional stirring device for the construction enlargement head according to claim 1, characterized in that: The three frame blades are evenly distributed along the circumference; each frame blade has a horizontal outer stirring blade on its vertical plate and an upward inclined outer stirring blade on its inclined plate; the first inner drill rod has three sets of inner stirring blades that interact with the two outer stirring blades of each frame blade, with each set consisting of three blades.
3. The bidirectional stirring device for the construction enlargement head according to claim 1, characterized in that: Each frame also includes a lower horizontal plate, the outer end of which is fixed to the lower end of the inclined plate, and the inner end of which is fixed to the lower connecting sleeve.
4. The bidirectional stirring device for the construction enlargement head according to claim 1, characterized in that: The power head has a passageway for another external drill rod to pass through, and the first internal drill rod has an inner hole for another external drill rod to slide and engage.
5. A pile driver, comprising a first tower mounted at the end of a construction platform, a first power head slidably fitted on the first tower, the first power head being connected to a first wire rope of a winch mechanism; characterized in that: The first power head is connected to the upper end of the first outer drill rod and the upper end of the first inner drill rod as described in any one of claims 1-3. The lower ends of the first outer drill rod and the lower ends of the first inner drill rod are both connected to the mixing head of the enlarged head. The pile driver also includes a second tower arranged in parallel at the end of the construction platform. A second power head is slidably fitted on the second tower. The second power head is connected to the second wire rope of the winch mechanism. The second power head is connected to the mixing head of the mixing pile via the second outer drill rod and the second inner drill rod.