Drill bit and rotary drilling rig

Abstract

The invention discloses a drill bit and a rotary drilling rig. The drill bit comprises a drill cylinder. The bulldozing assembly comprises a sleeve fixed to the top of the drilling barrel, and a sliding column capable of sliding up and down is arranged in the sleeve in a sleeved mode; the bottom of the sliding column extends into the drilling 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. The sliding column is sleeved with a spring, and the spring is located between the sleeve and the base. When soil adhering to a drill bit is removed, the pressing disc of the rotary drilling rig pushes the base to move up and down, the sliding column and the push plate can be driven to move up and down synchronously through up-down movement of the base, and therefore the soil adhering to the inner wall of the drill bit can be effectively removed. According to the soil removing method, the drill does not need to be shaken, efficiency is high, convenience and rapidness are achieved, noise cannot be generated, connection of the drill to the rotary drilling rig cannot be affected, and the defect that connection of the drill is not firm cannot be caused.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling rigs, in particular to a drill bit and a rotary drilling rig. Background Art

[0002] A rotary drilling rig is a construction machine suitable for drilling holes in building foundation projects. It is mainly suitable for construction in sandy soil, clay soil, silty soil and other soil layers. It is widely used in various foundation construction projects such as cast-in-place piles, continuous walls, and foundation reinforcement.

[0003] When a rotary drilling rig constructs small-diameter cast-in-place piles (pile diameter ≤ 600mm) in clay soil, commonly used drill bits include: dredging drill bits, rotary buckets (also called hole-clearing drill bits), split drill bits (also called two-piece drill bits), and flat spiral drill bits. Due to the relatively high friction between the soil and the drill bit, as well as the relatively high adhesion of the soil itself, the excavated soil and the inner wall of the drill bit adhere tightly together, making soil removal difficult and time-consuming. Existing rotary drilling rigs typically use a shaking method to remove the soil adhering to the inner wall of the drill bit. This method greatly reduces construction efficiency and produces harsh noise pollution. Furthermore, the shaking process affects the connection of the drill bit to the drill rod, which can easily lead to defects such as loose drill bit connections. Summary of the Invention

[0004] The object of the present invention 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 this end, the present invention provides a drill bit, including a drill barrel; a bulldozer assembly, which includes a casing fixed to the top of the drill barrel, and a sliding column that can slide up and down is sleeved in 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 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 casing and the base.

[0006] Preferably, a plurality of guide rails are fixed at equal intervals on the inner wall of the drill tube, and the edge of the push plate is provided with a sliding groove that matches the guide rails.

[0007] Preferably, a cover plate is fixed on the top of the drill pipe, and there are multiple casings, which are symmetrically and evenly spaced and fixed on the edge of the cover plate.

[0008] Preferably, the cover plate is provided with a through-hole corresponding to the sleeve, and the aperture of the through-hole is smaller than the inner diameter of the sleeve.

[0009] Preferably, the outer diameter of the sliding post is smaller than the diameter of the through hole, and the sliding post extends into the drill barrel from the through hole.

[0010] Preferably, it further comprises a connecting sleeve, a connecting plate is provided on the wall of the connecting sleeve, and the connecting plate is fixed on the cover plate.

[0011] Preferably, the projection of the base is a circular ring or a square ring, a central through hole is formed in the base, and the connecting sleeve corresponds to the central through hole of the base.

[0012] The present invention also provides a rotary drilling rig, comprising a drill rod and the drill bit.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are: When removing dirt adhered to the drill bit, the pressure plate of the rotary drilling rig pushes the base up and down. The up and down movement of the base can drive the sliding column and the push plate to move up and down synchronously, thereby effectively removing the dirt adhered to the inner wall of the drill bit. The method of removing dirt in this application does not require shaking the drill bit, is highly efficient, convenient and fast, does not generate noise, does not affect the connection of the drill bit to the rotary drilling rig, and does not cause the defect of the drill bit being loose.

[0014] A spring is provided on the sliding column, which can buffer the downward pressure of the pressure plate to prevent the downward pressure of the pressure plate from causing excessive impact and damage to the drill bit; the spring can buffer the up and down movement of the base and sliding column and rebound and shock-absorbing it, so that the downward moving base and sliding column can automatically move up and reset, and can slow down the vibration of the up and down movement of the base and sliding column, thereby reducing noise.

[0015] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a structural schematic diagram of an embodiment of a drill bit of the present invention; Figure 2 It is a partial structural schematic diagram of an embodiment of the drill bit of the present invention; Figure 3 It is a structural schematic diagram of an embodiment of the connecting sleeve of the present invention; Figure 4 It is a structural schematic diagram of an embodiment of a drill barrel of the present invention; Figure 5 It is a cross-sectional schematic diagram of an embodiment of the drill bit of the present invention. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-Figure 5As shown, the present invention discloses a drill bit including a drill barrel 10 with a bulldozer assembly mounted on the drill bit 10. The bulldozer assembly can be used to quickly and easily remove soil adhering to the drill bit without generating noise, affecting the connection of the drill bit to the drill rod of a rotary drilling rig, or causing the drill bit to become loose.

[0019] The drill barrel 10 is cylindrical, and a plurality of drill bit columns 11 are evenly spaced on the bottom edge of the drill barrel 10 . The angle between the axial direction of the drill bit column 11 and the axial direction of the drill barrel 10 can be acute or obtuse, which is not specifically limited here.

[0020] By arranging a plurality of drill bit columns 11 at equal intervals on the bottom edge of the drill tube 10, drilling can be facilitated.

[0021] The angle between the axial direction of the drill bit column 11 and the axial direction of the drill barrel 10 can be an acute angle or an obtuse angle, which can be beneficial for drilling.

[0022] A plurality of protruding rotating arms 15 are fixed to the outer wall of the drill tube 10 . The rotating arms 15 are arc-shaped and are arranged at equal intervals. The plurality of rotating arms 15 are arranged around the outer wall of the drill tube 10 .

[0023] By providing a protruding rotating arm 15 on the outer wall of the drill tube 10, the friction between the outer wall of the drill tube 10 and the soil can be increased, thereby facilitating soil drilling.

[0024] The bulldozer assembly includes a casing 21 fixed to the top of the drill barrel 10, and a sliding column 22 that can slide up and down is sleeved in the casing 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 casing 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 casing 21 and the base 24.

[0025] A plurality of guide rails 12 are fixed at equal intervals on the inner wall of the drill tube 10 , and a sliding groove 26 that cooperates with the guide rails 12 is provided on the edge of the push plate 23 .

[0026] The guide rail 12 extends along the axial direction of the drill tube 10, and extends from the top of the drill tube 10 to the bottom of the drill tube 10. The guide rail 12 can be welded and fixed to the inner wall of the drill tube 10, and no specific limitation is made here.

[0027] In one embodiment of the present application, the guide rail 12 may be in the shape of a rectangular parallelepiped, and the corresponding chute 26 may be in the shape of a rectangular opening, so that the chute 26 and the guide rail 12 can be adapted to each other. Alternatively, in another embodiment of the present application, the guide rail 12 may be in the shape of a semi-cylindrical shape, and the corresponding chute 26 may be in the shape of a semi-circular opening, so that the chute 26 and the guide rail 12 can be adapted to each other.

[0028] The number of guide rails 12 can be four, and the four guide rails 12 are symmetrically and evenly spaced on the inner wall of the drill tube 10; the corresponding number of slide grooves 26 is also four, and the four slide grooves 26 are symmetrically and evenly spaced on the edge of the push plate 23; through the cooperation of the four slide grooves 26 and the four guide rails 12, the push plate 23 can be guided and limited stably and effectively, ensuring that the push plate 23 can slide smoothly and effectively along the extension direction of the guide rails 12, and the sliding direction deviation of the push plate 23 can be effectively avoided.

[0029] 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 by other means. No specific limitation is made here.

[0030] The number of the 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 fixed on the edge of the cover plate 13 by vertical welding, which is not specifically limited here.

[0031] The edge of the cover plate 13 is provided with a perforation (not shown in the figure), the bottom of the sleeve 21 corresponds to the perforation, and the diameter of the perforation is smaller than the inner diameter of the sleeve 21 .

[0032] The outer diameter of the sliding column 22 is smaller than the inner diameter of the casing 21 and smaller than the diameter of the through hole. The sliding column 22 is inserted into the casing 21 and extends into the drill pipe 10 through the through hole.

[0033] The spring 25 is located between the sleeve 21 and the base 24 . The bottom of the spring 25 can contact the sleeve 21 , and the top of the spring 25 can contact the base 24 .

[0034] 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 contact the wall of the sleeve 21 .

[0035] A connecting sleeve 30 is fixed on the cover plate 13 . An opening 14 is provided on the cover plate 13 . The connecting sleeve 30 extends into the drill tube 10 through the opening 14 .

[0036] The shape of the opening 14 is compatible with the connecting sleeve 30. In one embodiment of the present application, the connecting sleeve 30 is a rectangular parallelepiped, and the corresponding opening 14 is a rectangle; in another embodiment of the present application, the connecting sleeve 30 can be cylindrical, and the corresponding opening 14 can be circular.

[0037] A plurality of connecting plates 31 are fixed to the outer wall of the connecting sleeve 30 , and the bottoms of the connecting plates 31 are welded and fixed to the cover plate 13 , so that the connecting sleeve 30 is fixed to the cover plate 13 .

[0038] The projection of the base 24 can be a circular ring or a square ring, and 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 aperture of the central through hole 27 is larger than the outer diameter or side length of the connecting sleeve 30, and the connecting sleeve 30 corresponds to the central through hole.

[0039] In one embodiment of the present application, the projection of the base 24 is a circular ring, the base 24 is parallel to the cover 13, and the base 24 is located above the cover 13; a central through hole 27 is formed inside the base 24, and the shape of the central through hole 27 can be circular. The aperture 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.

[0040] The drill bit of the present application is connected to a rotary drilling rig, wherein the drill rod (not shown in the figure) of the rotary drilling rig is extended into and connected to the connecting sleeve 30, wherein the pressure plate (not shown in the figure) of the rotary drilling rig is in corresponding conflict with the base 24.

[0041] Specifically, a connecting hole 32 is provided on the wall of the connecting sleeve 30, and a connecting cavity corresponding to the connecting hole 32 is provided on the drill rod of the rotary drilling rig. 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 connecting sleeve 30 can be connected together, so that the drill bit of the present application can be connected to the rotary drilling rig.

[0042] When removing dirt adhered to the drill bit, the pressure plate of the rotary drilling rig can push the base 24 up and down. The up and down movement of the base 24 can drive the sliding column 22 and the push plate 23 to move up and down synchronously, thereby effectively removing the dirt adhered to the inner wall of the drill tube 10. The method of removing dirt from the inner wall of the drill tube 10 does not require shaking the drill bit, is highly efficient, convenient and quick, does not generate noise, does not affect the connection of the drill bit to the rotary drilling rig, and does not cause the defect of the drill bit being loosely connected.

[0043] A spring 25 is mounted on the slide post 22 to cushion the downward pressure of the pressure plate, preventing it from causing excessive impact and damage to the drill bit. The spring 25 also provides a cushioning and rebound effect on the vertical movement of the base 24 and slide post 22, allowing them to automatically return to their original position. This reduces the vibration of the base 24, slide post 22, and push plate 23 as they move upward, thereby reducing noise.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A drill bit, characterized in that: include Drill barrel; The bulldozer assembly includes a casing fixed to the top of the drill barrel, a sliding column that can slide up and down is sleeved in 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 sleeved on the sliding column, and the spring is located between the casing and the base.

2. The drill bit according to claim 1, wherein A plurality of guide rails are fixed at equal intervals on the inner wall of the drill tube, and a sliding groove matching the guide rails is provided on the edge of the push plate.

3. The drill bit according to claim 1, wherein A cover plate is fixed on the top of the drill pipe, and there are multiple casings, which are symmetrically and evenly spaced and fixed on the edge of the cover plate.

4. The drill bit according to claim 3, wherein The cover plate is provided with a through hole corresponding to the sleeve, and the aperture of the through hole is smaller than the inner diameter of the sleeve.

5. The drill bit according to claim 4, wherein The outer diameter of the sliding post is smaller than the diameter of the through hole, and the sliding post extends into the drill barrel from the through hole.

6. The drill bit according to claim 3, wherein: It also includes a connecting sleeve, a connecting plate is provided on the wall of the connecting sleeve, and the connecting plate is fixed on the cover plate.

7. The drill bit according to claim 6, wherein The projection of the base is a circular ring or a square ring, a central through hole is formed in the base, and the connecting sleeve corresponds to the central through hole of the base.

8. A rotary drilling rig comprising a drill rod, characterized in that: Also included is a drill bit according to any one of claims 1-7.

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