CN218971121U

CN218971121U - Stirring drilling tool for foundation construction

Info

Publication number: CN218971121U
Application number: CN202221990392.7U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Zhaodi Technology Co ltd
Current assignee: Zhejiang Zhaodi Technology Co ltd
Priority date: 2022-07-30
Filing date: 2022-07-30
Publication date: 2023-05-05
Anticipated expiration: 2032-07-30

Abstract

The utility model discloses a stirring drilling tool for foundation construction, and belongs to the technical field of pile foundation drill bits. The drilling tool comprises a round hole machining part and a polygonal machining part which are coaxially arranged along the drilling direction; the round hole processing component comprises a drill rod and at least one sheet-shaped and/or spiral blade connected with the drill rod; the polygonal processing part comprises a cutting mechanism sleeved on the drill rod and an anti-rotation positioning frame circumferentially connected with the cutting mechanism. The pile hole forming device is equivalent to a hole forming part which is used for firstly forming holes, a polygonal hole forming part is used for reaming and shaping, the appearance of a pile hole is ensured to be formed by cutting the polygonal hole forming part, the pile hole with proper appearance can be obtained, soil can be fully cut and stirred through the hole forming part and the polygonal hole forming part, pile forming quality is improved, and through the arrangement, the quantity of power sources can be reduced, and equipment cost is reduced.

Description

Stirring drilling tool for foundation construction

Technical Field

The utility model relates to the technical field of pile foundation drill bits, in particular to a stirring drilling tool for foundation construction.

Background

Cement mixer pile foundation is an effective soft foundation treatment form, cement is usually used as a main agent of curing agent, cement is sprayed into soil body by using a mixer pile machine and fully mixed, so that a series of physical and chemical reactions are generated between the cement and the soil, and soft soil is hardened to improve the foundation strength.

In the prior art, a rotary drilling rig is generally used for smashing soil to form pile holes, then a slurry spraying pipe on a drill bit is used for spraying a curing agent, soil particles and the curing agent are stirred to form a cement soil reinforcing body, and the pile holes formed by the conventional rotary drilling rig are circular holes. However, the conventional precast pile has polygonal piles in addition to circular piles, so that the diameter of the cross section of the circular hole is necessarily larger than the maximum diagonal of the cross section of the polygonal pile in order to facilitate pile sinking, and resources (including but not limited to cement, electricity and manpower) are wasted.

Disclosure of Invention

The utility model aims to provide a stirring drilling tool for foundation construction, which aims to solve the technical problem that the shape of a pile hole is not matched with the shape of a precast pile.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a stirring drilling tool for foundation construction comprises a round hole processing part and a polygonal processing part which are coaxially arranged along a drilling direction;

the round hole processing component comprises a drill rod and at least one sheet-shaped and/or spiral blade connected with the drill rod;

the polygonal processing part comprises a cutting mechanism sleeved on the drill rod and an anti-rotation positioning frame circumferentially connected with the cutting mechanism.

Further, the blade includes a sheet-like stirring blade and a helical ripping blade, the round hole processing part further includes a cutting head at a lower end of the drill rod, the cutting head includes a centering tip, and at least a portion of the ripping blade is closer to the centering tip than the stirring blade.

Further, at least one nozzle is arranged at one end of the drill rod, which is close to the cutting head, and a protective plate which is closer to the centering tip than the nozzle is arranged beside the nozzle;

further, stirring blades are arranged at positions, close to the end parts, of the round hole machining part in the drilling and retreating directions, and at least part of upper blade surfaces and/or lower blade surfaces of the stirring blades are inclined to the central axis of the drill rod;

and/or at least part of adjacent stirring blades are arranged in a staggered manner in the central axis direction of the drill rod.

Further, a feed inlet is formed in one end, far away from the cutting head, of the drill rod, and a feed channel communicated with the feed inlet and the nozzle is formed in the drill rod.

Further, the cutting mechanism comprises at least one group of milling cutter components, the milling cutter components are connected with the drill rod through a gear transmission component, the gear transmission component comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is coaxially rotated with the drill rod, the driven bevel gear is coaxially rotated with the milling cutter components, and the driving bevel gear can transmit power to the driven bevel gear.

Further, the anti-rotation positioning frame is sleeved on the round hole machining part, and the anti-rotation positioning frame is closer to the end part of the round hole machining part than the cutting mechanism in the drilling direction;

the maximum distance L1 between the axis of the round hole machining part and the anti-rotation positioning frame is greater than the maximum distance L2 between the axis of the round hole machining part and the outer wall of the round hole machining part, and L1 is smaller than or equal to the maximum distance L3 between the axis of the round hole machining part and the cutting mechanism.

Further, the milling cutter assembly comprises at least one milling cutter shaft and at least one shape-modifying cutting blade coaxially sleeved with the milling cutter shaft to rotate and arranged at one end, far away from the drill rod, of the milling cutter shaft, and the driven bevel gear and the milling cutter shaft are coaxially sleeved to rotate; and the end part of the milling cutter shaft, which is close to the drill rod, is connected with a rotating base sleeved on the drill rod.

Further, the trimming cutting blade comprises a disc-shaped or strip-shaped blade body and at least one cutting tooth positioned at the edge of the blade body;

wherein the cutting teeth are arc-shaped or strip-shaped.

Further, cutting teeth of the modified cutting blades of two adjacent milling cutter assemblies are distributed in a dislocation mode in the drilling direction, and edges of axial projection patterns of movement tracks of the modified cutting blades of the two adjacent milling cutter assemblies at least partially intersect in the drilling direction.

In summary, the utility model has the following beneficial effects:

the utility model provides a stirring drilling tool for foundation construction, which comprises a round hole machining part and a polygonal machining part which are coaxially arranged along a drilling direction; the round hole processing component comprises a drill rod and at least one sheet-shaped and/or spiral blade connected with the drill rod; the polygonal processing part comprises a cutting mechanism sleeved on the drill rod and an anti-rotation positioning frame circumferentially connected with the cutting mechanism. The pile hole forming device is equivalent to a hole forming part which is used for firstly forming holes, a polygonal hole forming part is used for reaming and shaping, the appearance of a pile hole is ensured to be formed by cutting the polygonal hole forming part, the pile hole with proper appearance can be obtained, soil can be fully cut and stirred through the hole forming part and the polygonal hole forming part, pile forming quality is improved, and through the arrangement, the quantity of power sources can be reduced, and equipment cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a stirring drilling tool for foundation construction according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a structure of a polygonal hole processing component of a hidden part of a stirring drilling tool for foundation construction according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a schematic view of the configuration of a modified cutting blade;

fig. 5 is a bottom view of a stirring drill for foundation construction according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a round hole processing part;

11. a drill rod; 111. a nozzle; 112. a protective plate;

12. stirring blades;

13. tunneling blades;

14. a feed inlet;

2. a polygonal hole processing member;

21. a cutting mechanism;

211. a milling cutter assembly; 212. a housing;

22. an anti-rotation positioning frame;

3. a gear drive assembly; 31. a drive bevel gear; 32. a driven bevel gear;

4. milling cutter shaft; 41. rotating the base;

5. shaping the cutting blade; 51. a blade body; 52. cutting teeth;

6. centering the tip.

Detailed Description

In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

In the present specification, the terms "upper, lower, inner, outer" and the like are established based on the positional relationship shown in the drawings, and the corresponding positional relationship may be changed according to the drawings, so that the terms are not to be construed as absolute limitation of the protection scope; moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

Example 1

Referring to fig. 1 to 5, a stirring drill for foundation construction includes a circular hole processing member 1 and a polygonal hole processing member 2 coaxially arranged, the circular hole processing member 1 being located at a front end of the polygonal hole processing member 2. The circular hole-processing member 1 performs a cutting operation on the soil body prior to the polygonal hole-processing member 2. As a preferred technical solution, the polygonal hole processing part 2 shown in fig. 1 to 5 is used for making a rectangular hole, the rectangular hole belongs to one of the polygonal holes, and since the rectangular pile has a large outer surface area and is square or polygonal compared with other pile types, especially tubular piles, the angle of repose of the pile body and the soil in the soil layer is much larger than that of the circular appearance, the rectangular pile can obtain larger bearing capacity and has wide and reliable application prospect, therefore, the technical solution of the application is explained by the polygonal hole processing part 2 for making the rectangular hole, and the description of the technical solution is only used for better helping the person skilled in the art to understand the technical solution, and the limitation of the polygonal hole is not used.

Referring to fig. 5, the projection S1 of the round hole processing part 1 in the drilling direction is located in the projection S2 of the polygonal hole processing part 2 in the drilling direction, which is equivalent to that the round hole processing part 1 performs hole drilling first, the polygonal hole processing part 2 performs hole reaming and shape trimming, the pile hole shape is ensured to be formed by cutting the polygonal hole processing part 2, the pile hole shape with proper shape can be obtained, and soil mass can be sufficiently cut and stirred through the round hole processing part 1 and the polygonal hole processing part 2, so that pile forming quality is improved; and polygonal hole processing part 2 is driven by round hole processing part 1 to operate, through this setting, can reduce the quantity of power supply, reduce equipment cost.

Further, with reference to fig. 1 to 3, the round hole machining part 1 comprises a drill rod 11 and at least one sheet-like and/or helical blade connected to the drill rod 11. The blades can cut and stir the soil body, and the number of the blades is set according to actual requirements.

Further, referring to fig. 1 to 3, the blades include a sheet-shaped stirring blade 12 and a spiral-shaped tunneling blade 13, and the spiral-shaped tunneling blade 13 has a downward tunneling force when rotating itself, so that the tunneling efficiency can be improved; the round hole machining part 1 further comprises a cutting head at the lower end of the drill rod 11, which cutting head comprises a centering tip 6 (as shown in fig. 3). One of the functions of the centering tip 6 is to ensure the accuracy of the drilling during the driving operation of the stirring tool and to crush harder soil, at least part of the driving blades 13 being closer to the centering tip 6 than the stirring blades 12, since the spiral driving blades 13 also have the function of transporting the crushed soil away from the centering tip 6 and to ensure that the centering tip 6 is not buried by the soil during operation.

Further, as shown in fig. 3, the end of the drill rod 11 near the cutting head is provided with at least one nozzle 111, wherein a protective plate 112 is provided beside the nozzle 111 closer to the centering tip 6 than the nozzle 111. The nozzle 111 can spray water or slurry, so that the cutting efficiency of a stirring drilling tool can be improved, the water content in pile holes can be reduced by spraying dry concrete materials and the like through the nozzle 111 to form a powder concrete pile, and the protective plate 112 can prevent soil from affecting or even blocking the nozzle 111, so that the nozzle 111 can be protected to a certain extent by the protective plate 112.

Further, as shown in fig. 1 and 2, the positions of the round hole processing part 1 near the end parts in the drilling and retracting directions are provided with stirring blades 12, and the positions of the round hole processing part 1 near the end parts in the retracting direction are provided with the stirring blades 12 to ensure that the soil body is uniformly stirred after the polygonal hole processing part 2 works, and simultaneously, the soil body can be prevented from being brought out during retracting. At least part of the upper blade surface and/or the lower blade surface of the stirring blade 12 is inclined to the central axis of the drill rod 11, and by arranging the inclined upper blade surface and/or lower blade surface, the resistance of the stirring blade 12 during stirring can be reduced, the drilling and the drilling withdrawal are facilitated, and during stirring, the soil body can move obliquely upwards along the upper blade surface of the stirring blade 12, so that stirring is more sufficient. Of course, a lower cutting edge for the tangential rotational direction at the time of drilling and an upper cutting edge for the tangential rotational direction at the time of retracting may be provided in the rotational direction of the stirring vane 12.

Further, as shown in fig. 1 and 2, at least some of the adjacent stirring blades 12 are offset in the direction of the central axis of the drill rod 11. The staggered arrangement prevents the adjacent stirring blades 12 from interfering during working, ensures sufficient stirring uniformity and prevents partial soil mass from having uneven density in the vertical direction, and can effectively improve the quality of the prepared pile body.

Further, as shown in fig. 1 to 3, a feed port 14 is provided at an end of the drill rod 11 remote from the cutting head, and a feed passage communicating with the feed port 14 and the nozzle 111 is provided in the drill rod 11. The feed opening 14, the nozzle 111 and the conveying pipe can ensure that water is injected into the formed holes and other materials which are convenient for punching and pile forming are carried out. The water and other molding materials are uniformly sprayed out in the circumferential direction under the condition that the nozzle 111 rotates along with the drill rod 11, and then can be uniformly mixed with soil under the action of the tunneling blades 13 and the stirring blades 12, so that the quality of the prepared pile body is ensured to reach the standard.

Further, as shown in fig. 1, the polygonal hole processing member 2 includes an anti-rotation positioning frame 22 having a polygonal outer contour cross section, and a cutting mechanism 21 connected to the anti-rotation positioning frame 22 in a circumferential direction. As a preferred technical solution, the polygonal hole processing member 2 in this embodiment is used for making rectangular piles, the anti-rotation positioning frame 22 has a rectangular cross section, and the anti-rotation positioning frame 22 contacts the soil body before the cutting mechanism 21. The cutting mechanism 21 is generally square in shape and itself interacts with the surrounding soil in the circumferential direction during operation and also has an anti-rotation effect.

Further, as shown in fig. 1 and 2, the cutting mechanism 21 includes at least one set of milling cutter assemblies 211, the milling cutter assemblies 211 and the drill pipe 11 are connected through a gear assembly 3, the gear assembly 3 includes a drive bevel gear 31 rotating coaxially with the drill pipe 11 and a driven bevel gear 32 rotating coaxially with the milling cutter assemblies 211, and the drive bevel gear 31 can transmit power to the driven bevel gear 32. The anti-rotation positioning frame 22 further comprises a housing 212 for protecting the drive bevel gear 31 and the driven bevel gear 32 from being meshed, and the housing 212 can prevent slurry or other substances in soil from affecting reversing transmission between the drill rod 11 and the milling cutter assembly 211. Preferably, the housing 212 also provides a passageway in the direction of the drill bit through which slurry or other material in the soil may pass.

Further, as shown in fig. 1, the anti-rotation positioning frame 22 is sleeved on the round hole processing part 1, and the anti-rotation positioning frame 22 is closer to the end of the round hole processing part 1 than the cutting mechanism 21 in the drilling direction; the round hole processing part 1 is equivalent to the first contact with the soil body, the rotation preventing locating frame 22 is in contact with the soil body, and the cutting mechanism 21 is the last contact; this arrangement makes it possible to advance the rotation preventing retainer 22 circumferentially with the soil body which has not been cut by the cutting mechanism 21, and also makes it possible to prevent the rotation preventing retainer 22 from being excessively difficult to drill because the soil body has been cut by the round hole processing member 1.

Specifically, as shown in fig. 5, the maximum distance L1 of the axis line of the round hole machining part 1 from the anti-rotation positioning frame 22 is greater than the maximum distance L2 of the axis line of the round hole machining part 1 from the outer wall of the round hole machining part, and L1 is less than or equal to the maximum distance L3 of the axis line of the round hole machining part 1 from the cutting mechanism 21. This arrangement of L1 being smaller than L2 can make the anti-rotation positioning frame 22 and the soil body cut vertically, and four corners of the anti-rotation positioning frame and the soil body limit each other in the circumferential direction, so that the cutting mechanism 21 can be ensured not to idle in the circumferential direction, and the polygonal hole, particularly the square hole, can be ensured to be manufactured.

Further, as shown in fig. 1 and 2, the milling cutter assembly 211 includes a milling cutter shaft 4, a shape-modifying cutting blade 5 coaxially sleeved with the milling cutter shaft 4 and mounted on an end of the milling cutter shaft 4 far away from the drill rod 11, and a driven bevel gear 32 coaxially sleeved with the milling cutter shaft 4. And the end part of the milling cutter shaft 4, which is close to the drill rod 11, is connected with a rotating base 41 sleeved on the drill rod 11. The milling cutter shaft 4 is rotatably connected with the rotary base 41, and the milling cutter shaft and the rotary base are mutually limited in the radial direction of the pile body to prevent separation. The modified cutting blade 5 is located outside of the housing 212. The number of milling cutter components 211, milling cutter shafts 4 and shape-modifying cutting blades 5 is set according to practical situations, and can be specifically determined according to the required pile hole shape, in this embodiment, four groups of milling cutter components are selected when rectangular holes are manufactured, and the number in this scheme is only used for facilitating understanding of the technology.

Specifically, as shown in fig. 4, the trimming cutting blade 5 includes a disc-shaped or elongated blade body 51, at least one cutting tooth 52 located at an edge of the blade body 51; the disc-shaped or elongated blade body 51 may also be in contact with the soil body to avoid self-transmission of the polygonal hole machining member 2. Wherein, the cutting teeth 52 are arc-shaped or strip-shaped, so that harder soil bodies can be crushed, and the cutting stirring efficiency is improved. The number and configuration of the cutting teeth 52 are installed according to actual requirements.

Further, as shown in fig. 1 and 5, the cutting teeth 52 of the modified cutting blades 5 of two adjacent milling cutter assemblies 211 are offset in the drilling direction, and the axial projection pattern edges of the movement trajectories of the modified cutting blades 5 of two adjacent milling cutter assemblies 211 in the drilling direction intersect at least partially. As the preferable technical scheme, the arrangement can ensure that incomplete cutting can not occur at the corners of the square holes, simultaneously can avoid the mutual influence of two adjacent shape-modifying cutting blades 5, can fully cut the corners and improve the appearance quality of the pile holes. The rotation centers of adjacent profile-modifying cutting blades 5 are distributed in a staggered manner in the axial direction. It is ensured that adjacent profiled cutting blades 5 do not interfere with each other and that the phenomenon of the cutting mechanism 21 idling is reduced to some extent. The above arrangement regarding the at least partial intersection of the edges of the axial projection of the motion trajectories of the adjacent two trimming cutting blades 5 also provides a certain anti-rotation function for the trimming cutting blades 5 themselves when the intersection occurs.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Claims

1. The stirring drilling tool for foundation construction is characterized by comprising a round hole machining part (1) and a polygonal machining part (2) which are coaxially arranged along the drilling direction;

the round hole machining part (1) comprises a drill rod (11) and at least one sheet-shaped and/or spiral blade connected with the drill rod (11);

the polygonal processing part (2) comprises a cutting mechanism (21) sleeved on the drill rod (11) and an anti-rotation positioning frame (22) circumferentially connected with the cutting mechanism (21).

2. The stirring drill for foundation construction according to claim 1, characterized in that the blades comprise a sheet-like stirring blade (12) and a helical ripping blade (13), the round hole processing part (1) further comprises a cutting head at the lower end of the drill rod (11), the cutting head comprising a centering tip (6), at least part of the ripping blade (13) being closer to the centering tip (6) than the stirring blade (12).

3. Stirring drilling tool for foundation construction according to claim 2, characterized in that the end of the drill rod (11) near the cutting head is provided with at least one nozzle (111), and that the nozzle (111) is provided by a protective plate (112) closer to the centering tip (6) than the nozzle (111).

4. The stirring drilling tool for foundation construction according to claim 2, characterized in that the round hole processing part (1) is provided with stirring blades (12) at positions close to the end parts in the drilling and withdrawal directions, and at least part of the upper blade surfaces and/or the lower blade surfaces of the stirring blades (12) are inclined to the central axis of the drill rod (11);

and/or at least part of the adjacent stirring blades (12) are arranged in a staggered manner in the direction of the central axis of the drill rod (11).

5. A stirring drilling tool for foundation construction according to claim 3, characterized in that the end of the drill rod (11) remote from the cutting head is provided with a feed inlet (14), and a feed channel communicated with the feed inlet (14) and the nozzle (111) is arranged in the drill rod (11).

6. The stirring drilling tool for foundation construction according to any one of claims 2-5, characterized in that the cutting mechanism (21) comprises at least one set of milling cutter assemblies (211), the milling cutter assemblies (211) and the drill rod (11) are connected by means of a gear transmission assembly (3), the gear transmission assembly (3) comprises a drive bevel gear (31) rotating coaxially with the drill rod (11) and a driven bevel gear (32) rotating coaxially with the milling cutter assemblies (211), the drive bevel gear (31) being capable of transmitting power to the driven bevel gear (32).

7. The stirring drill for foundation construction according to claim 6, characterized in that the rotation preventing positioning frame (22) is sleeved on the round hole processing member (1), and the rotation preventing positioning frame (22) is closer to the end of the round hole processing member (1) than the cutting mechanism (21) in the drilling direction;

the maximum distance L1 between the axis of the round hole machining part (1) and the anti-rotation positioning frame (22) is larger than the maximum distance L2 between the axis of the round hole machining part (1) and the outer wall of the round hole machining part, and L1 is smaller than or equal to the maximum distance L3 between the axis of the round hole machining part (1) and the cutting mechanism (21).

8. The stirring drilling tool for foundation construction according to claim 7, characterized in that the milling cutter assembly (211) comprises at least one milling cutter shaft (4), at least one shaping cutting blade (5) coaxially sleeved with the milling cutter shaft (4) and mounted at one end of the milling cutter shaft (4) far away from the drill rod (11), and the driven bevel gear (32) coaxially sleeved with the milling cutter shaft (4) for rotation; and the end part of the milling cutter shaft (4) close to the drill rod (11) is connected with a rotating base (41) sleeved on the drill rod (11).

9. The stirring drilling tool for foundation construction according to claim 8, characterized in that the shaped cutting blade (5) comprises a disc-shaped or elongated blade body (51), at least one cutting tooth (52) located at the edge of the blade body (51);

wherein the cutting teeth (52) are arc-shaped or elongated.

10. The stirring drill for foundation construction of claim 9, wherein the cutting teeth (52) of the modified cutting blades (5) of two adjacent milling cutter assemblies (211) are offset in the drilling direction, and the axial projection pattern edges of the motion trajectories of the modified cutting blades (5) of two adjacent milling cutter assemblies (211) in the drilling direction are at least partially intersected.