Underreaming drill bit of drilling machine

Abstract

The utility model relates to the technical field of engineering drills, and particularly discloses a drilling machine underreaming drill bit which comprises a rotating seat and a drilling disc, the drilling disc is arranged below the rotating seat, and a power device is arranged between the rotating seat and the drilling disc. The upper ends of the reaming connecting rods are hinged to the lower end of the rotating seat, the lower ends of the reaming connecting rods are hinged to the upper end of the drilling disc, a limiting seat is arranged at the lower end of the rotating seat, grooves are formed in the left side and the right side of the limiting seat, and the reaming connecting rods are in sliding connection with the grooves. The guide wheel piece is in sliding connection with an arc guide groove formed in the inner side of the groove. When the chambering connecting rod acts, the grooves in the left side and the right side of the limiting seat can limit the chambering connecting rod, the guide wheel pieces are arranged on the left side and the right side of the rock breaking rod and can slide along the arc guide grooves, the arc guide grooves are matched with the guide wheel pieces to secondarily limit the chambering connecting rod, and it is guaranteed that the chambering connecting rod cannot incline after working for a long time, and stability is better.

Description

Technical Field

[0001] This utility model relates to the field of engineering drilling rig technology, and in particular to a drilling rig underreaming bit. Background Technology

[0002] The underreaming bit is mainly installed on the power end of the drilling rig. It is used to enlarge the bottom of the hole during the drilling process to increase the diameter of the bottom of the hole, thereby improving the bearing capacity of pile foundations, etc. It is widely used in construction, mining and other fields.

[0003] For example, Chinese patent application number CN202220926167.0 discloses a two-section rotary drilling bit for reverse construction of foundation pits, including a cross-shaped frame, an upper expanding bottom, and a lower expanding bottom. The upper expanding bottom is connected to the side of the cross-shaped frame, and the lower expanding bottom is connected to the lower end of the cross-shaped frame. This rotary drilling bit has an upper expanding bottom and a lower expanding bottom. During the expanding process, the upper expanding bottom can maintain and stabilize the already expanded pile surface, making the fully expanded pile bottom more stable. However, because the upper and lower expanding bottoms are subjected to significant lateral pressure during rotation, if the drill bit encounters a hard object while drilling downwards, it can easily cause the expanding bottom to tilt, affecting subsequent recovery. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a drilling rig underreaming bit, which solves the shortcomings of current underreaming bits, such as the large lateral pressure they experience during rotation, and the tendency for the underreaming bit to tilt when encountering a hard object during downward drilling, thus affecting subsequent recovery.

[0005] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a drilling rig underreaming drill bit, including a rotating base and a drill disk, the drill disk being placed below the rotating base, and a power device for controlling the longitudinal movement of the drill disk being provided between the rotating base and the drill disk;

[0006] The power unit has a set of reaming connecting rods on each of its left and right sides. The upper end of the reaming connecting rod is hinged to the lower end of the rotary seat, and the lower end of the reaming connecting rod is hinged to the upper end of the drill plate.

[0007] The lower end of the rotary table is provided with a limiting seat, which is fixedly connected to the rotary table. Grooves are provided on the left and right sides of the limiting seat, and the hole-expanding connecting rod is slidably connected to the grooves. Guide wheels are fixedly provided on the left and right sides of the hole-expanding connecting rod, and the guide wheels are slidably connected to the arc guide grooves opened inside the grooves.

[0008] A further improvement is that the power unit includes a hydraulic push rod, a rotary seat and a limit seat are sleeved on the outside of the hydraulic push rod, the mounting end of the hydraulic push rod is fixedly connected to the rotary seat and the limit seat, and the output end of the hydraulic push rod is fixedly connected to the upper end of the drill plate.

[0009] A further improvement is that the hole-expanding connecting rod includes a transmission rod and a rock-breaking rod. The upper end of the rock-breaking rod is hinged to the lower end of the rotary seat via a pivot, and the lower end of the transmission rod is hinged to the upper end of the drill plate via a pivot. The upper end of the transmission rod is also hinged to the lower end of the rock-breaking rod.

[0010] A further improvement is that the rock-breaking rod is provided with several sets of second protruding teeth on the side away from the transmission rod for breaking the rock layer, and the second protruding teeth are fixedly connected to the rock-breaking rod.

[0011] A further improvement is that the guide wheel component includes a limiting shaft and a slip ring. The limiting shaft is fixedly connected to the left and right sides of the rock-breaking rod, and the slip ring is sleeved on the outside of the limiting shaft. The slip ring is rotatably connected to the limiting shaft and slidably connected to the arc guide groove.

[0012] A further improvement is that: a drill bit is provided at the lower end of the drill disk, the drill bit is fixedly connected to the drill disk, a number of third protruding teeth are provided at the lower end of the drill bit, the third protruding teeth are fixedly connected to the drill bit, and a number of third reinforcing ribs are provided between the drill bit and the drill disk, the third reinforcing ribs are fixedly connected to the drill disk and the drill bit.

[0013] A further improvement is that: a first reinforcing rib is provided at the connection between the limiting seat and the rotating seat, the first reinforcing rib is fixedly connected to the lower end of the rotating seat and the outer side wall of the limiting seat, and the outer side wall of the limiting seat is provided with a number of first protruding teeth.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] When the reaming connecting rod is in operation, the grooves on the left and right sides of the limiting seat will limit the reaming connecting rod. The guide wheel is set on the left and right sides of the rock breaking rod and can slide along the arc guide groove. The arc guide groove cooperates with the guide wheel to limit the reaming connecting rod a second time, ensuring that the reaming connecting rod will not tilt during long-term operation and has better stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the rock-breaking rod in this utility model.

[0018] Figure 2 This is a structural diagram of the drill disc in this utility model.

[0019] Figure 3 This is a structural diagram of the circular arc guide groove in this utility model.

[0020] The components are: 1. Hydraulic push rod; 2. Rotary seat; 3. Limiting seat; 4. First protruding tooth; 5. First reinforcing rib; 6. Drill disc; 7. Transmission rod; 8. Rock breaking rod; 9. Second protruding tooth; 10. Second reinforcing rib; 11. Groove; 12. Drill bit; 13. Third protruding tooth; 14. Third reinforcing rib; 15. Arc guide groove; 16. Limiting shaft; 17. Slip ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] according to Figure 1 , 2 As shown in Figure 3, this embodiment proposes a drilling rig underreaming bit, including a rotary seat 2 and a drill disk 6. The drill disk 6 is placed below the rotary seat 2, and a power device for controlling the longitudinal movement of the drill disk 6 is provided between the rotary seat 2 and the drill disk 6.

[0023] A set of expanding connecting rods is provided on each of the left and right sides of the power unit. The upper end of the expanding connecting rod is hinged to the lower end of the rotating seat 2, and the lower end of the expanding connecting rod is hinged to the upper end of the drill plate 6.

[0024] Rotary seat 2 is connected to a rotary unit, which controls the rotation of rotary seat 2. The power unit, the reaming connecting rod, and the drill disc 6 rotate together. The drill disc 6 drills the bottom hole, and the reaming connecting rod widens the hole. When the power unit pushes the drill disc 6 down, the distance between the two sets of reaming connecting rods will decrease. When the power unit pulls the drill disc 6 up, the distance between the two sets of reaming connecting rods will increase, and the hole spacing will become wider.

[0025] The lower end of the rotating base 2 is provided with a limiting seat 3, which is fixedly connected to the rotating base 2. The left and right sides of the limiting seat 3 are provided with grooves 11, and the hole-expanding connecting rod is slidably connected to the grooves 11. The left and right sides of the hole-expanding connecting rod are fixedly provided with guide wheels, which are slidably connected to the arc guide grooves 15 opened inside the grooves 11.

[0026] When the expanding connecting rod is folded and unfolded, the grooves 11 on the left and right sides of the limiting seat 3 will limit the expanding connecting rod, improve the stability of the expanding connecting rod during operation, and strengthen the structural strength of the expanding connecting rod. The guide wheel is set on the left and right sides of the rock breaking rod 8 and can slide along the arc guide groove 15. The arc guide groove 15 cooperates with the guide wheel to limit the expanding connecting rod a second time, ensuring that the expanding connecting rod will not tilt during long-term operation and has better stability.

[0027] Regarding the power unit:

[0028] The power unit includes a hydraulic push rod 1, a rotating seat 2, and a limiting seat 3 fitted around the outside of the hydraulic push rod 1. The mounting end of the hydraulic push rod 1 is fixedly connected to the rotating seat 2 and the limiting seat 3, and the output end of the hydraulic push rod 1 is fixedly connected to the upper end of the drill table 6. The lifting of the drill table 6 is controlled by the hydraulic push rod 1. The rotating seat 2 and the limiting seat 3 fitted around the hydraulic push rod 1 not only serve a fixing function but also protect the hydraulic push rod 1.

[0029] Regarding the enlarged hole connecting rod:

[0030] The reaming linkage includes a transmission rod 7 and a rock-breaking rod 8. The upper end of the rock-breaking rod 8 is hinged to the lower end of the rotary seat 2 via a pivot. The lower end of the transmission rod 7 is hinged to the upper end of the drill disk 6 via a pivot, and the upper end of the transmission rod 7 is hinged to the lower end of the rock-breaking rod 8. After the hydraulic push rod 1 pushes the drill disk 6 down, the drill disk 6 will pull the rock-breaking rod 8 through the transmission rod 7, causing the two sets of rock-breaking rods 8 to move closer to the hydraulic push rod 1, reducing the distance between the two sets of rock-breaking rods 8. After the hydraulic push rod 1 pulls the drill disk 6 up, the drill disk 6 will push the rock-breaking rod 8 outward through the transmission rod 7, increasing the distance between the two sets of rock-breaking rods 8.

[0031] To improve the hole-expanding efficiency of the rock-breaking rod 8, the rock-breaking rod 8 is provided with several sets of second protruding teeth 9 on the side away from the transmission rod 7 for breaking the rock strata. The second protruding teeth 9 are fixedly connected to the rock-breaking rod 8.

[0032] Regarding guide wheels:

[0033] The guide wheel assembly includes a limiting shaft 16 and a slip ring 17. The limiting shaft 16 is fixedly connected to the left and right sides of the rock-breaking rod 8. The slip ring 17 is sleeved on the outside of the limiting shaft 16 and is rotatably connected to the limiting shaft 16. The slip ring 17 is slidably connected to the arc guide groove 15. The slip ring 17 is rolled within the arc guide groove 15 opened inside the groove 11. When the transmission rod 7 drives the rock-breaking rod 8 to fold and unfold, the rock-breaking rod 8 slides along the groove 11. The slip ring 17, which is rotatably set outside the limiting shaft 16, will roll along the arc guide groove 15. The limiting shaft 16 and the slip ring 17 provide support and secondary limiting for the rock-breaking rod 8 from the left and right sides.

[0034] The drill bit 6, through rotation, breaks up rock blocks in the borehole. Specifically, a drill bit 12 is located at the lower end of the drill bit 6 and is fixedly connected to the drill bit 6. Several third protrusions 13 are located at the lower end of the drill bit 12 and are also fixedly connected to it. Several third reinforcing ribs 14 are located between the drill bit 12 and the drill bit 6 and are fixedly connected to both. These third reinforcing ribs 14 are evenly distributed circumferentially along the axis of the drill bit 12. Besides accelerating the hole-reaming efficiency of the drill bit 12, they also strengthen the structural strength of the drill bit 12 and the drill bit 6.

[0035] The limiting seat 3 drives the rock-breaking rod 8 to rotate. The limiting seat 3 will bear a large lateral pressure. Therefore, it is necessary to set a reinforcing member between the rotating seat 2 and the limiting seat 3 to improve the impact resistance of the limiting seat 3. In the preferred embodiment, a first reinforcing rib 5 is provided at the connection between the limiting seat 3 and the rotating seat 2. The first reinforcing rib 5 is fixedly connected to the lower end of the rotating seat 2 and the outer side wall of the limiting seat 3. The outer side wall of the limiting seat 3 is provided with several first protruding teeth 4.

[0036] How this application works:

[0037] Rotary seat 2 is connected to a rotary unit, which controls the rotation of rotary seat 2. The power unit, reaming connecting rod, and drill disk 6 rotate together. Drill disk 6 drills the bottom hole, and reaming connecting rod widens the hole. When the power unit pushes the drill disk 6 down, the distance between the two sets of reaming connecting rods decreases. When the power unit pulls the drill disk 6 up, the distance between the two sets of reaming connecting rods increases, and the hole spacing widens. When the reaming connecting rod is folded and unfolded, the grooves 11 on the left and right sides of the limiting seat 3 limit the reaming connecting rod, improving the stability of the reaming connecting rod during operation and strengthening the structural strength of the reaming connecting rod. The guide wheel is set on the left and right sides of the rock-breaking rod 8 and can slide along the arc guide groove 15. The arc guide groove 15, in cooperation with the guide wheel, provides secondary limiting for the reaming connecting rod, ensuring that the reaming connecting rod will not tilt during long-term operation and has better stability.

[0038] In the description of this application, it should be noted that the terms "upper," "lower," 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 application and simplifying the description, and 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A drilling rig underreaming bit, comprising a rotating base (2) and a drill disk (6), wherein the drill disk (6) is positioned below the rotating base (2), characterized in that: A power device for controlling the longitudinal movement of the drill disk (6) is provided between the rotary table (2) and the drill disk (6); The power device is provided with a set of expanding connecting rods on the left and right sides. The upper end of the expanding connecting rod is hinged to the lower end of the rotating seat (2), and the lower end of the expanding connecting rod is hinged to the upper end of the drill plate (6). The lower end of the rotating seat (2) is provided with a limiting seat (3), the limiting seat (3) is fixedly connected to the rotating seat (2), the left and right sides of the limiting seat (3) are provided with grooves (11), the hole-expanding connecting rod is slidably connected to the grooves (11), the left and right sides of the hole-expanding connecting rod are fixedly provided with guide wheels, and the guide wheels are slidably connected to the arc guide groove (15) opened inside the groove (11).

2. The drilling rig underreaming bit according to claim 1, characterized in that: The power unit includes a hydraulic push rod (1), the rotating seat (2) and the limiting seat (3) are sleeved on the outside of the hydraulic push rod (1), the mounting end of the hydraulic push rod (1) is fixedly connected to the rotating seat (2) and the limiting seat (3), and the output end of the hydraulic push rod (1) is fixedly connected to the upper end of the drill plate (6).

3. A drilling rig underreaming bit according to claim 1, characterized in that: The hole-expanding connecting rod includes a transmission rod (7) and a rock-breaking rod (8). The upper end of the rock-breaking rod (8) is hinged to the lower end of the rotating seat (2) via a pivot. The lower end of the transmission rod (7) is hinged to the upper end of the drill plate (6) via a pivot. The upper end of the transmission rod (7) is hinged to the lower end of the rock-breaking rod (8).

4. A drilling rig underreaming bit according to claim 3, characterized in that: The rock-breaking rod (8) has several sets of second protruding teeth (9) on the side away from the transmission rod (7) for breaking the rock layer, and the second protruding teeth (9) are fixedly connected to the rock-breaking rod (8).

5. A drilling rig underreaming bit according to claim 3, characterized in that: The guide wheel component includes a limiting shaft (16) and a slip ring (17). The limiting shaft (16) is fixedly connected to the left and right sides of the rock-breaking rod (8). The slip ring (17) is sleeved on the outside of the limiting shaft (16). The slip ring (17) is rotatably connected to the limiting shaft (16) and slidably connected to the arc guide groove (15).

6. A drilling rig underreaming bit according to claim 1, characterized in that: The lower end of the drill disk (6) is provided with a drill bit (12), which is fixedly connected to the drill disk (6). The lower end of the drill bit (12) is provided with a plurality of third protruding teeth (13), which are fixedly connected to the drill bit (12). A plurality of third reinforcing ribs (14) are provided between the drill bit (12) and the drill disk (6), which are fixedly connected to the drill disk (6) and the drill bit (12).

7. A drilling rig underreaming bit according to claim 2, characterized in that: The connection between the limiting seat (3) and the rotating seat (2) is provided with a first reinforcing rib (5). The first reinforcing rib (5) is fixedly connected to the lower end of the rotating seat (2) and the outer side wall of the limiting seat (3). The outer side wall of the limiting seat (3) is provided with a plurality of first protruding teeth (4).

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