Cast-in-place pile rotary excavating structure

Abstract

The utility model relates to the technical field of rotary excavating structures, in particular to a cast-in-place pile rotary excavating structure which comprises a drill bit, a connecting pile is fixedly installed at the upper end of the drill bit, an air hole is formed in the upper end of the drill bit, a plurality of strip-shaped holes are evenly formed in the side wall of the outer end of the drill bit, the section of each strip-shaped hole is in a convex shape, and the inner end of the drill bit is connected with an abutting ring in a sliding mode. By means of the designed abutting ring and abutting pieces, when a drill bit conducts rotary excavating on a common soil layer with low hardness, the common soil layer is squeezed by the abutting pieces to be broken, broken soil can penetrate through the intervals between the abutting pieces, hard rock can abut against the abutting pieces, in this way, the common soil layer can penetrate through the abutting ring and the abutting pieces easily, and therefore the drill bit is convenient to use. And meanwhile, through the designed adjusting assembly, the position of the abutting ring can be freely adjusted, flexibility and convenience are achieved, and different rock socketed depth requirements can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary drilling structures, in particular to a cast-in-place pile rotary drilling structure. Background Art

[0002] A bored pile is a pile made by drilling a hole in place and pouring concrete or reinforced concrete. When drilling a hole, a special drill bit is needed to perform rotary drilling. After searching, a Chinese patent application with application number CN202221105042.8 records a new drill bit structure for the construction of rock-embedded bored piles with a rotary drilling rig. In this patent, a supporting member is provided on the drill bit to support the rock, thereby avoiding over-drilling and under-drilling.

[0003] However, the above patents still have certain shortcomings in actual use. First, when using ordinary annular abutment members or abutment blocks, when the drill bit drills ordinary soil layers, the protruding abutment members will also be violently squeezed against the soil layer, resulting in the need for greater rotary drilling pressure, and the abutment blocks are prone to damage due to long-term pressure. Second, the position of the abutment members on the drill bit is not easy to adjust, and it cannot well adapt to the rock embedment depth requirements under different circumstances. Therefore, the present utility model proposes a cast-in-place pile rotary drilling structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a cast-in-place pile rotary drilling structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a cast-in-place pile rotary drilling structure, comprising: a drill bit, a connecting pile fixedly mounted on the upper end of the drill bit, an air vent formed on the upper end of the drill bit, a plurality of strip-shaped holes uniformly formed on the side wall of the outer end of the drill bit, the cross-section of the strip-shaped holes being convex, a supporting ring slidably connected to the inner end of the drill bit, a plurality of supporting plates uniformly fixedly mounted on the inner end of the supporting ring;

[0006] The holding ring is fixed to the inner end of the drill bit through an adjusting component. The bottom end of the drill bit is installed with a bottom ring through a fixing component. The lower end of the bottom ring is evenly fixed with a plurality of saw teeth, and the plurality of saw teeth are staggered.

[0007] Preferably, the lower end of the supporting ring is provided with an oblique cutout.

[0008] Preferably, the adjusting component includes a plurality of teeth, a plurality of sliders and a tooth plate, one end of the slider is fixedly mounted on the outer wall of the supporting ring, the other end of the slider is fixedly mounted with a threaded column, and the plurality of teeth are evenly fixedly mounted on the inner end side wall of the strip hole.

[0009] Preferably, the threaded column is inserted into the strip hole, the threaded column slides through the tooth plate and is threadedly connected with a nut, so that the tooth plate and the teeth engage with each other, and the slider is slidably connected to the inner port side wall of the strip hole.

[0010] Preferably, the threaded column and the nut are located inside the outer end of the strip-shaped hole.

[0011] Preferably, the fixing component includes a plug-in slot provided at the lower end of the drill bit and a plug-in block fixedly mounted at the upper end of the bottom ring.

[0012] Preferably, the plug-in block is slidably inserted into the plug-in slot and fixedly connected by a fixing bolt.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Through the designed support ring and support plate, when the drill bit rotates to drill ordinary soil layers with lower hardness, the ordinary soil layers will be crushed by the squeezing of the support plates, and the crushed soil will pass through the gaps between the support plates, while the hard rock will be supported by the support plates. In this way, it is beneficial for ordinary soil layers to pass through the support ring and the support plates, and it is not easy to produce severe squeezing between the two. At the same time, through the designed adjustment component, the position of the support ring can be freely adjusted, which is flexible and convenient, and is conducive to adapting to different rock embedment depth requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front sectional view of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the supporting ring structure of the utility model;

[0017] Figure 3 For this utility model Figure 1 A magnified view of the structure of the middle A area;

[0018] Figure 4 This is a schematic diagram of the bottom ring of the utility model being fixed to the lower end of the drill bit.

[0019] In the figure: 1. Drill bit; 2. Connecting pile; 3. Air vent; 4. Strip hole; 5. Teeth; 6. Support ring; 7. Support plate; 8. Oblique cut; 9. Slider; 10. Threaded column; 11. Tooth plate; 12. Nut; 13. Bottom ring; 14. Serration; 15. Plug-in groove; 16. Plug-in block; 17. Fixing bolt. DETAILED DESCRIPTION

[0020] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 4 The utility model provides a technical solution: a bored pile rotary drilling structure, comprising: a drill bit 1, a connecting pile 2 is fixedly installed on the upper end of the drill bit 1 for connecting with an external component, an air vent 3 is opened on the upper end of the drill bit 1 for air ventilation, a plurality of strip holes 4 are evenly opened on the side wall of the outer end of the drill bit 1, and the cross section of the strip hole 4 is convex, the inner end of the drill bit 1 is slidably connected with a supporting ring 6, and the inner end of the supporting ring 6 is evenly fixed with a plurality of supporting pieces 7, the supporting ring 6 is fit to the inner wall of the drill bit 1, and the supporting pieces 7 are annularly distributed on the inner side of the supporting ring 6. Such spaced supporting pieces 7 can allow ordinary soil layers to pass through and resist against rocks, reducing the extrusion force between the supporting ring 6 and the supporting piece 7 and the ordinary soil layer. The lower end of the supporting ring 6 is provided with an oblique cut 8, which further reduces the extrusion force between the supporting ring 6 and the soil layer, making it more conducive to the penetration of the soil layer.

[0022] The supporting ring 6 is fixed to the inner end of the drill bit 1 through an adjusting component. The adjusting component includes a plurality of teeth 5, a plurality of sliders 9 and a tooth plate 11. One end of the slider 9 is fixedly mounted on the outer wall of the supporting ring 6, and a threaded column 10 is fixedly mounted on the other end of the slider 9. A plurality of teeth 5 are evenly fixedly mounted on the inner end side wall of the strip hole 4. The threaded column 10 is inserted into the strip hole 4. The threaded column 10 slides through the tooth plate 11 and is threadedly connected with a nut 12, so that the tooth plate 11 and the teeth 5 are engaged with each other to fix the supporting ring 6. The slider 9 is slidably connected to the inner port side wall of the strip hole 4, and the slider 9 is limited by the strip hole 4, so that the supporting ring 6 can be stably raised and lowered.

[0023] The threaded column 10 and the nut 12 are located on the inner side of the outer end of the strip hole 4. By moving the threaded column 10 up and down inside the strip hole 4, the position of the supporting ring 6 can be adjusted. Then, the nut 12 can be tightened to fix the supporting ring 6.

[0024] The bottom end of the drill bit 1 is installed with a bottom ring 13 through a fixing component. The lower end of the bottom ring 13 is evenly fixed with several serrations 14. The several serrations 14 are staggered, and excavation is performed by the mutually staggered serrations 14. The fixing component includes a plug-in slot 15 opened at the lower end of the drill bit 1 and a plug-in block 16 fixedly installed at the upper end of the bottom ring 13. The plug-in block 16 is slidably inserted into the plug-in slot 15 and fixedly connected by a fixing bolt 17. The plug-in block 16 is inserted into the inside of the plug-in slot 15 opened at the bottom end of the drill bit 1 to complete the positioning connection of the bottom ring 13. The plug-in slot 15 is staggered with the opening at the bottom end of the strip hole 4 to avoid obstruction of the opening. The fixing bolt 17 is fixedly connected to the inside of the plug-in block 16 and the plug-in slot 15 to fix the bottom ring 13 to the bottom of the drill bit 1. Personnel can unscrew the fixing bolt 17 to remove the bottom ring 13 for maintenance and replacement.

[0025] When the device is working, when the drill bit 1 is rotating to drill the ordinary soil layer with lower hardness, the ordinary soil layer will be crushed by the squeezing of the supporting pieces 7, and the crushed soil will pass through the gaps between the supporting pieces 7, while the hard rock will be resisted by the supporting pieces 7. In this way, it is beneficial for the ordinary soil layer to pass through the supporting ring 6 and the supporting piece 7, and it is not easy to produce severe abutment and squeezing between the two. At the same time, through the designed adjustment component, the position of the supporting ring 6 can be freely adjusted, which is flexible and convenient, and is beneficial to adapt to different rock embedment depth requirements.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast-in-place pile rotary drilling structure, comprising: A drill bit (1) is provided, wherein a connecting pile (2) is fixedly mounted on the upper end of the drill bit (1), and an air vent (3) is provided on the upper end of the drill bit (1). The drill bit (1) is characterized in that a plurality of strip-shaped holes (4) are evenly provided on the side wall of the outer end of the drill bit (1), and the cross section of the strip-shaped holes (4) is convex; a supporting ring (6) is slidably connected to the inner end of the drill bit (1), and a plurality of supporting plates (7) are evenly fixedly mounted on the inner end of the supporting ring (6); The holding ring (6) is fixed to the inner end of the drill bit (1) through an adjusting component. The bottom end of the drill bit (1) is installed with a bottom ring (13) through a fixing component. The lower end of the bottom ring (13) is evenly fixed with a plurality of saw teeth (14), and the plurality of saw teeth (14) are staggered.

2. The cast-in-place pile rotary drilling structure according to claim 1, characterized in that: The lower end of the supporting ring (6) is provided with an oblique cutout (8).

3. The bored pile rotary drilling structure according to claim 1, characterized in that: The adjusting component comprises a plurality of teeth (5), a plurality of sliders (9) and a tooth plate (11); one end of the slider (9) is fixedly mounted on the outer wall of the supporting ring (6); the other end of the slider (9) is fixedly mounted with a threaded column (10); and the plurality of teeth (5) are evenly fixedly mounted on the inner end side wall of the strip hole (4).

4. The cast-in-place pile rotary drilling structure according to claim 3, characterized in that: The threaded column (10) is inserted into the strip hole (4), the threaded column (10) slides through the tooth plate (11) and is threadedly connected with a nut (12), so that the tooth plate (11) and the teeth (5) are engaged with each other, and the slider (9) and the inner port side wall of the strip hole (4) are slidably connected.

5. The cast-in-place pile rotary drilling structure according to claim 4, characterized in that: The threaded column (10) and the nut (12) are located inside the outer end of the strip-shaped hole (4).

6. The cast-in-place pile rotary drilling structure according to claim 1, characterized in that: The fixing component comprises a plug-in slot (15) provided at the lower end of the drill bit (1) and a plug-in block (16) fixedly mounted on the upper end of the bottom ring (13).

7. The cast-in-place pile rotary drilling structure according to claim 6, characterized in that: The plug-in block (16) is slidably inserted into the plug-in slot (15) and fixedly connected by a fixing bolt (17).

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