Improved rotary excavating drill bit

Abstract

The utility model discloses an improved rotary excavating drill bit which comprises a drill rod connected with a drilling machine, a rotating bucket arranged at the bottom of the drill rod, a movable drill bit mechanism arranged at the bottom of the rotating bucket, a cleaning ring longitudinally connected with the inner wall of the rotating bucket in a sliding mode, a fixing block fixedly connected with the inner side of the cleaning ring, and a hydraulic telescopic cylinder connected with the top end of the fixing block. The utility model has the advantages that the hourglass type movable disc can rotate, the opening at the bottom of the rotating bucket can be freely controlled to be opened and closed, the device is convenient and practical, the structure is more stable, the cleaning ring can be controlled to move up and down only by operating the hydraulic telescopic cylinder, so that soil attached to the inner wall of the rotating bucket can be scraped, and the device is more practical; the cleanness of the inner wall of the rotating bucket is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of rotary drilling rig technology, specifically to an improved rotary drilling bit. Background Technology

[0002] Rotary drilling rigs are machines that primarily use a rotating bucket, short auger bit, or other actuators for wet drilling, and their basic function is to form a hole by repeatedly removing soil and performing cyclic operations. Currently, in the market, the drill bit at the bottom of the bucket is connected to the bucket via a flip-top design. Over long-term use, this method easily leads to wear at the opening and closing points of the bucket and drill bit, preventing the drill bit from closing properly at the bottom of the bucket. Furthermore, in actual use, soil easily adheres to the inner wall of the bucket, making it difficult to empty the soil completely. This not only affects the bucket's internal capacity but also makes cleaning difficult. Therefore, an improved rotary drilling bit is provided to solve these problems. Utility Model Content

[0003] To solve the problems mentioned above, the technical solution adopted by this utility model is: an improved rotary drilling bit, comprising: a drill rod connected to a drilling rig, a rotating bucket at the bottom of the drill rod, a movable drill bit mechanism at the bottom of the rotating bucket, a cleaning ring slidably connected longitudinally to the inner wall of the rotating bucket, a fixing block fixedly connected to the inner side of the cleaning ring, a hydraulic telescopic cylinder connected to the top of the fixing block, the movable drill bit mechanism comprising an hourglass-shaped fixed plate, a rotating shaft, an hourglass-shaped movable plate, and a cutter head, the rotating shaft being connected to the outer side of the middle of the hourglass-shaped fixed plate, the hourglass-shaped movable plate being movably connected to the outer side of the hourglass-shaped fixed plate via the rotating shaft, and the cutter head being installed at the outer edge of the hourglass-shaped movable plate.

[0004] As a preferred embodiment of this utility model, the outer side of the hourglass-shaped fixed plate is symmetrically provided with limiting protrusions, and the outer side of the limiting protrusions is flush with the outer side of the hourglass-shaped movable plate.

[0005] As a preferred embodiment of this utility model, the drill rod is provided with a flange seat, the top of the rotating bucket is fixedly connected to a cross seat, the flange seat is fixedly connected to the top of the cross seat by bolts, and a clamping hoop is fixedly connected to the outside of the cross seat by bolts.

[0006] As a preferred technical solution of this utility model, there are two hydraulic telescopic cylinders, and both hydraulic telescopic cylinders are fixedly connected to the outside of the cross seat by a clamping hoop.

[0007] As a preferred technical solution of this utility model, a limiting block is fixedly connected to the outer side of the limiting protrusion, the inner side of the limiting block is attached to the outer side of the hourglass-shaped movable disk, and the limiting block is trapezoidal in shape.

[0008] As a preferred technical solution of this utility model, the number of the cutter heads is set to several, and the several cutter heads are symmetrically distributed on both sides of the hourglass-shaped movable disc.

[0009] As a preferred technical solution of this utility model, the hourglass-shaped movable disc has a shaft hole in the middle, which matches the rotating shaft, and the hourglass-shaped movable disc has an extension opening on one side of the rotating bucket, which is an arc-shaped structure.

[0010] As a preferred technical solution of this utility model, an opening is reserved between the rotating bucket and the hourglass-shaped fixed plate, and the number of the openings is set to two, with the two openings being distributed opposite each other on both sides of the hourglass-shaped fixed plate.

[0011] As a preferred embodiment of this utility model, the outer ring of the cleaning ring is the same as the inner ring of the rotating bucket, and the outer side of the rotating bucket slidably fits against the inner side of the outer extension opening.

[0012] This utility model has the following advantages: the hourglass-shaped movable disc can be rotated, which allows for easy control of the opening and closing of the bottom of the bucket, making it convenient and practical, and the structure is more stable; moreover, the cleaning ring can be moved up and down simply by operating the hydraulic telescopic cylinder, thereby scraping off the soil adhering to the inner wall of the bucket, which is quite practical and effectively ensures the cleanliness of the inner wall of the bucket. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0014] Figure 2 This is a partial cross-sectional view of the rotating bucket according to a preferred embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the bottom structure of the rotating bucket according to a preferred embodiment of the present invention;

[0016] Figure 4 This is a preferred embodiment of the present utility model. Figure 3 Diagram of the split structure.

[0017] Explanation of reference numerals in the attached drawings: 1. Drill rod; 2. Flange seat; 3. Cross seat; 4. Rotary bucket; 5. Hydraulic telescopic cylinder; 6. Clamping hoop; 7. Cleaning ring; 8. Fixing block; 9. Hourglass-shaped fixing plate; 10. Rotating shaft; 11. Limiting protrusion; 12. Limiting block; 13. Hourglass-shaped movable plate; 14. Shaft hole; 15. Cutting head; 16. Outer extension; 17. Opening. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Please refer to the following: Figures 1-4 This utility model discloses an improved rotary drilling bit, comprising: a drill rod 1 connected to a drilling rig; a rotating bucket 4 at the bottom of the drill rod 1; a movable drill bit mechanism at the bottom of the rotating bucket 4; a cleaning ring 7 longitudinally slidably connected to the inner wall of the rotating bucket 4; a fixing block 8 fixedly connected to the inner side of the cleaning ring 7; a hydraulic telescopic cylinder 5 connected to the top of the fixing block 8; and a movable drill bit mechanism comprising an hourglass-shaped fixed plate 9, a rotating shaft 10, an hourglass-shaped movable plate 13, and a cutter head 15. The rotating shaft 10 is connected to the outer side of the middle of the hourglass-shaped fixed plate 9, the hourglass-shaped movable plate 13 is movably connected to the outer side of the hourglass-shaped fixed plate 9 through the rotating shaft 10, and the cutter head 15 is installed at the outer edge of the hourglass-shaped movable plate 13.

[0022] Combination Figure 2 and Figure 3 As shown, the hourglass-shaped fixed plate 9 is symmetrically provided with limiting protrusions 11 on the outside. The maximum rotation angle of the hourglass-shaped movable plate 13 can be limited by the limiting protrusions 11. The outer side of the limiting protrusions 11 is flush with the outside of the hourglass-shaped movable plate 13. The drill rod 1 is provided with a flange seat 2. The top of the rotating bucket 4 is fixedly connected to a cross seat 3. The flange seat 2 is fixedly connected to the top of the cross seat 3 by bolts. The outer side of the cross seat 3 is fixedly connected to a clamping hoop 6 by bolts. There are two hydraulic telescopic cylinders 5. Both hydraulic telescopic cylinders 5 are fixedly connected to the outer side of the cross seat 3 by the clamping hoop 6. The lifting and lowering of the cleaning ring 7 can be controlled by the hydraulic telescopic cylinders 5.

[0023] Among them, the limiting protrusion 11 is fixedly connected to the limiting block 12 on the outside, and the inner side of the limiting block 12 is attached to the outer side of the hourglass-shaped movable disk 13. The limiting block 12 can ensure that the hourglass-shaped movable disk 13 is attached to the limiting protrusion 11, making its structure more stable. The limiting block 12 is trapezoidal in shape. Several cutter heads 15 are provided, and several cutter heads 15 are symmetrically distributed on both sides of the hourglass-shaped movable disk 13. Soil can be drilled through the cutter heads 15. The hourglass-shaped movable disk 13 has a shaft hole 14 in the middle, which matches the rotating shaft 10. The hourglass-shaped movable disk 13 has an extension 16 on one side of the rotating bucket 4. The extension 16 is an arc-shaped structure. An opening 17 is reserved between the rotating bucket 4 and the hourglass-shaped fixed disk 9. There are two openings 17, which are distributed opposite each other on both sides of the hourglass-shaped fixed disk 9. The outer ring of the cleaning ring 7 is the same as the inner ring of the rotating bucket 4. The outer circumference of the rotating bucket 4 slides and is attached to the inner side of the extension 16.

[0024] Specifically, when this utility model is in use, the drilling rig drives the drill rod 1 to rotate, which in turn drives the rotating bucket 4 to rotate. The bottom of the rotating bucket 4 contacts the ground and rotates, causing the hourglass-shaped movable disc 13 at the bottom of the rotating bucket 4 to rotate to the limit protrusion 11 and get stuck between the limit blocks 12. This opens the opening 17 at the hourglass-shaped fixed disc 9, allowing drilling operations to be performed. The drilled soil enters the rotating bucket 4 through the opening 17. When the rotating bucket 4 is full of soil, the drilling rig rotates the drill rod 1 in the opposite direction, causing the rotating bucket 4 to rotate in the opposite direction. This causes the hourglass-shaped movable disc 13 to rotate and block the opening 17, allowing the soil in the rotating bucket 4 to be lifted out. When it is necessary to dump the soil in the rotating bucket 4, the opening 17 at the bottom of the rotating bucket 4 is opened, and the soil in the rotating bucket 4 falls through the opening 17. Then, the hydraulic telescopic cylinder 5 moves up and down with the cleaning ring 7, thereby scraping off the soil adhering to the inner wall of the rotating bucket 4.

[0025] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0026] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An improved rotary drilling bit, comprising: The drill rod (1) connected to the drilling rig is characterized in that a rotating bucket (4) is provided at the bottom of the drill rod (1), a movable drill bit mechanism is provided at the bottom of the rotating bucket (4), a cleaning ring (7) is longitudinally slidably connected to the inner wall of the rotating bucket (4), a fixing block (8) is fixedly connected to the inner side of the cleaning ring (7), a hydraulic telescopic cylinder (5) is connected to the top of the fixing block (8), and the movable drill bit mechanism includes an hourglass-shaped fixed plate (9), a rotating shaft (10), an hourglass-shaped movable plate (13), and a cutter head (15). The rotating shaft (10) is connected to the outer side of the middle part of the hourglass-shaped fixed plate (9), the hourglass-shaped movable plate (13) is movably connected to the outer side of the hourglass-shaped fixed plate (9) through the rotating shaft (10), and the cutter head (15) is installed at the outer edge of the hourglass-shaped movable plate (13).

2. The improved rotary drilling bit as described in claim 1, characterized in that, The hourglass-shaped fixed plate (9) is symmetrically provided with limiting protrusions (11) on the outside, and one side of the limiting protrusions (11) is flush with the outside of the hourglass-shaped movable plate (13).

3. An improved rotary drilling bit as described in claim 1, characterized in that, The drill rod (1) is provided with a flange seat (2), and the top of the rotating bucket (4) is fixedly connected with a cross seat (3). The flange seat (2) is fixedly connected to the top of the cross seat (3) by bolts, and a clamping hoop (6) is fixedly connected to the outside of the cross seat (3) by bolts.

4. An improved rotary drilling bit as described in claim 1, characterized in that, The hydraulic telescopic cylinder (5) is provided in two quantities, and both hydraulic telescopic cylinders (5) are fixedly connected to the outside of the cross seat (3) by a clamping hoop (6).

5. An improved rotary drilling bit as described in claim 2, characterized in that, The limiting protrusion (11) is fixedly connected to the limiting block (12) on the outside, and the inner side of the limiting block (12) is attached to the outer side of the hourglass-shaped movable disc (13). The limiting block (12) is trapezoidal in shape.

6. An improved rotary drilling bit as described in claim 1, characterized in that, The number of the cutter heads (15) is set to several, and the several cutter heads (15) are symmetrically distributed on both sides of the hourglass-shaped movable disc (13).

7. An improved rotary drilling bit as described in claim 1, characterized in that, The hourglass-shaped movable disc (13) has a shaft hole (14) in the middle, which matches the rotating shaft (10). The hourglass-shaped movable disc (13) has an extension opening (16) on one side of the rotating bucket (4), and the extension opening (16) is an arc-shaped structure.

8. An improved rotary drilling bit as described in claim 1, characterized in that, An opening (17) is reserved between the rotating bucket (4) and the hourglass-shaped fixed plate (9). There are two openings (17), which are distributed opposite each other on both sides of the hourglass-shaped fixed plate (9).

9. An improved rotary drilling bit as described in claim 1, characterized in that, The outer ring of the cleaning ring (7) is the same as the inner ring of the rotating bucket (4), and the outer side of the rotating bucket (4) slides against the inner side of the outer extension (16).

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