A drill bit and rotary drilling rig
By designing a synchronous movement structure for the sliding column and push plate on the rotary drilling rig bit, combined with spring buffering, the problem of difficult soil removal from the inner wall of the drill bit in cohesive soil strata was solved, improving construction efficiency and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE QINGDAO PORT CO
- Filing Date
- 2025-08-05
- Publication Date
- 2026-06-30
AI Technical Summary
When existing rotary drilling rigs operate in cohesive soil strata, it is difficult to remove the soil adhering to the inner wall of the drill bit, resulting in low construction efficiency, noise pollution, and unstable drill bit connections.
A drill bit was designed, including a drill barrel and a bulldozing assembly. By synchronously moving the slide and push plate up and down, combined with spring cushioning, it can efficiently remove soil, avoid shaking the drill bit, and reduce noise and the risk of loose connections.
It achieves efficient removal of soil from the inner wall of the drill bit, improves construction efficiency, reduces noise, ensures a stable drill bit connection, and avoids equipment damage.
Smart Images
Figure CN224432447U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drilling technology, specifically to a drill bit and a rotary drilling rig. Background Technology
[0002] Rotary drilling rigs are construction machines suitable for hole-forming operations in building foundation engineering. They are mainly suitable for construction in soil layers such as sand, cohesive soil, and silty soil, and are widely used in various foundation constructions such as cast-in-place piles, continuous walls, and foundation reinforcement.
[0003] When rotary drilling rigs are used to construct small-diameter cast-in-place piles (pile diameter ≤ 600mm) in cohesive soil strata, commonly used drilling tools include: mud-dredging bits, rotary buckets (also called hole-cleaning bits), open-body bits (also called two-part bits), and flat auger bits. Due to the relatively high friction between the soil and the drill bit, as well as the relatively high cohesive force of the soil itself, the excavated soil adheres tightly to the inner wall of the drill bit, making soil removal difficult and time-consuming. Existing rotary drilling rigs typically use a shaking motion to remove the soil adhering to the inner wall of the drill bit. This method significantly reduces construction efficiency, generates harsh noise pollution, and the shaking process can affect the connection between the drill bit and the drill rod, easily leading to defects such as an unstable drill bit connection. Summary of the Invention
[0004] The purpose of this utility model is to provide a drill bit and a rotary drilling rig to solve one or more of the above-mentioned problems in the prior art.
[0005] To address this, the present invention provides a drill bit, including a drill barrel; a bulldozing assembly, which includes a sleeve fixed to the top of the drill barrel, a sliding column that can slide up and down is sleeved inside the sleeve; the bottom of the sliding column extends into the drill barrel, and a push plate is fixed to the bottom of the sliding column; the top of the sliding column extends out of the sleeve, and a base is fixed to the top of the sliding column; a spring is sleeved on the sliding column, and the spring is located between the sleeve and the base; the inner diameter of the spring is larger than the inner diameter of the sleeve, and the outer diameter of the spring is smaller than the outer diameter of the sleeve.
[0006] Preferably, the inner wall of the drill barrel is fixed with multiple guide rails at equal intervals, and the edge of the push plate is provided with a sliding groove that cooperates with the guide rails.
[0007] Preferably, a cover plate is fixed to the top of the drill barrel, and there are multiple casings, which are symmetrically and equally spaced and fixed to the edge of the cover plate.
[0008] Preferably, the cover plate has a through hole corresponding to the sleeve, and the diameter of the through hole is smaller than the inner diameter of the sleeve.
[0009] Preferably, the outer diameter of the sliding pin is smaller than the diameter of the through hole, and the sliding pin extends into the drill barrel through the through hole.
[0010] Preferably, it further includes a connecting sleeve, the sleeve having a connecting plate on its wall, the connecting plate being fixed to the cover plate.
[0011] Preferably, the projection of the base is a circular or square ring, and a central through hole is formed inside the base, with the connecting sleeve corresponding to the central through hole of the base.
[0012] This utility model also provides a rotary drilling rig, including a drill rod and the aforementioned drill bit.
[0013] Compared with the prior art, the advantages and positive effects of this utility model are:
[0014] In this application, when removing soil adhering to the drill bit, the pressure plate of the rotary drilling rig pushes the base up and down. This up-and-down movement of the base drives the sliding column and push plate to move up and down synchronously, effectively removing the soil adhering to the inner wall of the drill bit. This method of removing soil does not require shaking the drill bit, is highly efficient, convenient, and quick, produces no noise, does not affect the connection of the drill bit to the rotary drilling rig, and avoids defects such as a loose drill bit connection.
[0015] A spring is fitted on the slide column. The spring can buffer the downward pressure of the pressure plate, preventing excessive impact and damage to the drill bit. The spring can also buffer and rebound the vertical movement of the base and slide column, allowing the lowered base and slide column to automatically move back to their original position. This reduces the vibration of the vertical movement of the base and slide column, thereby reducing noise.
[0016] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the drill bit of this utility model;
[0018] Figure 2 This is a partial structural schematic diagram of one embodiment of the drill bit of this utility model;
[0019] Figure 3 This is a schematic diagram of the structure of one embodiment of the connecting sleeve of this utility model;
[0020] Figure 4 This is a schematic diagram of the structure of one embodiment of the drill barrel of this utility model;
[0021] Figure 5 This is a cross-sectional schematic diagram of one embodiment of the drill bit of this utility model. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0023] like Figures 1-5 As shown, this utility model discloses a drill bit, including a drill barrel 10, on which a bulldozing component is installed. By setting the bulldozing component, the soil adhering to the drill bit can be removed conveniently and quickly without generating noise, affecting the connection of the drill bit to the drill rod of the rotary drilling rig, or causing the drill bit connection to be unstable.
[0024] The drill barrel 10 is cylindrical, and multiple drill bit posts 11 are provided at equal intervals on the bottom edge of the drill barrel 10. The angle between the axial direction of the drill bit post 11 and the axial direction of the drill barrel 10 can be acute or obtuse, and no specific restrictions are imposed here.
[0025] By setting multiple drill bit columns 11 at equal intervals along the bottom edge of the drill barrel 10, drilling can be facilitated.
[0026] The angle between the axial direction of the drill bit string 11 and the axial direction of the drill barrel 10 can be acute or obtuse, which can be beneficial for drilling soil.
[0027] Multiple protruding rotating arms 15 are fixed on the outer wall of the drill barrel 10. The rotating arms 15 are arc-shaped and are arranged at equal intervals, surrounding the outer wall of the drill barrel 10.
[0028] By providing a protruding rotating arm 15 on the outer wall of the drill barrel 10, the friction between the outer wall of the drill barrel 10 and the soil can be increased, making it easier to drill.
[0029] The bulldozing assembly includes a sleeve 21 fixed to the top of the drill barrel 10, and a sliding column 22 that can slide up and down is sleeved inside the sleeve 21; the bottom of the sliding column 22 extends into the drill barrel 10, and a push plate 23 is fixed to the bottom of the sliding column 22; the top of the sliding column 22 extends out of the sleeve 21, and a base 24 is fixed to the top of the sliding column 22; a spring 25 is sleeved on the sliding column 22, and the spring 25 is located between the sleeve 21 and the base 24.
[0030] Multiple guide rails 12 are fixed at equal intervals on the inner wall of the drill barrel 10, and the edge of the push plate 23 is provided with a sliding groove 26 that cooperates with the guide rails 12.
[0031] The guide rail 12 extends along the axial direction of the drill barrel 10, from the top to the bottom of the drill barrel 10. The guide rail 12 can be welded and fixed to the inner wall of the drill barrel 10, and no specific limitation is made here.
[0032] In one embodiment of this application, the guide rail 12 can be cuboid in shape, and the corresponding groove 26 can be a rectangular open groove, so that the groove 26 and the guide rail 12 can be adapted to each other. Alternatively, in another embodiment of this application, the guide rail 12 can be semi-cylindrical in shape, and the corresponding groove 26 can be a semi-circular open groove, so that the groove 26 and the guide rail 12 can be adapted to each other.
[0033] The number of guide rails 12 can be four, and the four guide rails 12 are symmetrically and equally spaced on the inner wall of the drill barrel 10; the number of corresponding sliding grooves 26 is also four, and the four sliding grooves 26 are symmetrically and equally spaced on the edge of the push plate 23; through the cooperation of the four sliding grooves 26 and the four guide rails 12, the push plate 23 can play a stable and effective guiding and limiting role, ensuring that the push plate 23 can slide smoothly and effectively along the extension direction of the guide rails 12, and effectively avoid the sliding direction of the push plate 23 from being skewed.
[0034] A cover plate 13 is fixed to the top of the drill barrel 10. The cover plate 13 is circular and covers the top opening of the drill barrel 10. The cover plate 13 can be welded to the top of the drill barrel 10 or fixedly connected to the top of the drill barrel 10 in other ways. No specific restrictions are made here.
[0035] The number of sleeves 21 can be four, and the four sleeves 21 are fixed at equal intervals on the edge of the cover plate 13. The sleeves 21 can be vertically welded to the edge of the cover plate 13, and there is no specific limitation here.
[0036] The edge of the cover plate 13 is provided with a perforation (not shown in the figure), and the bottom of the sleeve 21 corresponds to the perforation. The diameter of the perforation is smaller than the inner diameter of the sleeve 21.
[0037] The outer diameter of the sliding column 22 is smaller than the inner diameter of the casing 21, and the outer diameter of the sliding column 22 is smaller than the diameter of the perforation. The sliding column 22 is inserted into the casing 21, and the sliding column 22 extends into the drill barrel 10 through the perforation.
[0038] Spring 25 is located between sleeve 21 and base 24. The bottom of spring 25 can abut against sleeve 21, and the top of spring 25 can abut against base 24.
[0039] The inner diameter of the spring 25 is larger than the inner diameter of the sleeve 21, and the outer diameter of the spring 25 is smaller than the outer diameter of the sleeve 21, so that the bottom of the spring 25 can abut against the wall of the sleeve 21.
[0040] A connecting sleeve 30 is fixed on the cover plate 13. The cover plate 13 has an opening 14, and the connecting sleeve 30 extends into the drill barrel 10 through the opening 14.
[0041] The shape of the opening 14 is adapted to the connecting sleeve 30. In one embodiment of this application, the connecting sleeve 30 is cuboid and the corresponding opening 14 is rectangular. In another embodiment of this application, the connecting sleeve 30 can be cylindrical and the corresponding opening 14 can be circular.
[0042] Multiple connecting plates 31 are fixed to the outer wall of the connecting sleeve 30. The bottom of the connecting plates 31 is welded and fixed to the cover plate 13, thereby fixing the connecting sleeve 30 to the cover plate 13.
[0043] The projection of the base 24 can be a circular ring or a square ring. A central through hole 27 is formed inside the base 24. The shape of the central through hole 27 can be circular, rectangular, or other shapes. The diameter of the central through hole 27 is larger than the outer diameter or side length of the connecting sleeve 30. The connecting sleeve 30 corresponds to the central through hole.
[0044] In one embodiment of this application, the projection of the base 24 is annular, the base 24 and the cover plate 13 are parallel, and the base 24 is located above the cover plate 13; a central through hole 27 is formed inside the base 24, the shape of the central through hole 27 can be circular, the diameter of the central through hole 27 is larger than the outer diameter or side length of the connecting sleeve 30, the connecting sleeve 30 corresponds to the central through hole, and the base 24 is higher than the top of the connecting sleeve 30.
[0045] The drill bit of this application is connected to a rotary drilling rig, wherein the drill rod of the rotary drilling rig (not shown in the figure) extends into and is connected to the connecting sleeve 30, wherein the pressure plate of the rotary drilling rig (not shown in the figure) and the base 24 respectively abut against each other.
[0046] Specifically, the sleeve 30 has a connecting hole 32 on its wall, and the drill rod of the rotary drilling rig has a connecting cavity corresponding to the connecting hole 32. A connecting pin (not shown in the figure) is inserted into the connecting hole 32 and the connecting cavity, so that the drill rod and the sleeve 30 can be connected together, and the drill bit of this application can be connected to the rotary drilling rig.
[0047] When removing soil adhering to the drill bit, the pressure plate of the rotary drilling rig can push the base 24 to move up and down. This up-and-down movement of the base 24 drives the sliding column 22 and push plate 23 to move up and down synchronously, effectively removing the soil adhering to the inner wall of the drill barrel 10. The method of removing soil from the inner wall of the drill barrel 10 in this application does not require shaking the drill bit, is highly efficient, convenient, quick, does not generate noise, does not affect the connection of the drill bit on the rotary drilling rig, and does not cause defects such as a loose drill bit connection.
[0048] A spring 25 is fitted onto the sliding column 22. The spring 25 can buffer the downward pressure of the pressure plate, preventing excessive impact and damage to the drill bit. The spring 25 can also buffer, dampen, and rebound the vertical movement of the base 24 and the sliding column 22, allowing the lowered base 24 and the sliding column 22 to automatically move back to their original positions. This reduces the vibration of the vertical movement of the base 24, the sliding column 22, and the push plate 23, thereby reducing noise.
[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.
Claims
1. A drill bit, characterized by include Drill barrel; A bulldozing assembly includes a casing fixed to the top of a drill barrel, a sliding column that can slide up and down is fitted inside the casing; the bottom of the sliding column extends into the drill barrel and a push plate is fixed to the bottom of the sliding column; the top of the sliding column extends out of the casing and a base is fixed to the top of the sliding column; a spring is fitted on the sliding column and the spring is located between the casing and the base. The inner diameter of the spring is larger than the inner diameter of the sleeve, and the outer diameter of the spring is smaller than the outer diameter of the sleeve.
2. The drill bit as described in claim 1, characterized in that, The inner wall of the drill barrel is fixed with multiple guide rails at equal intervals, and the edge of the push plate is provided with a sliding groove that cooperates with the guide rails.
3. The drill bit as described in claim 1, characterized in that, The top of the drill barrel is fixed with a cover plate, and there are multiple casings, which are fixed symmetrically and at equal intervals to the edge of the cover plate.
4. The drill bit as described in claim 3, characterized in that, The cover plate has a through hole corresponding to the sleeve, and the diameter of the through hole is smaller than the inner diameter of the sleeve.
5. The drill bit as described in claim 4, characterized in that, The outer diameter of the sliding pin is smaller than the diameter of the through hole, and the sliding pin extends into the drill barrel through the through hole.
6. The drill bit as described in claim 3, characterized in that, It also includes a connecting sleeve, on the sleeve wall of which a connecting plate is provided, and the connecting plate is fixed to the cover plate.
7. The drill bit as described in claim 6, characterized in that, The projection of the base is circular or square, and a central through hole is formed inside the base. The connecting sleeve corresponds to the central through hole of the base.
8. A rotary drilling rig comprising a drill pipe, characterized in that It also includes the drill bit as described in any one of claims 1-7.