A replaceable cone assembly for a cone barrel drill

Abstract

The utility model relates to rotary digging cylinder drill technical field, concretely is a kind of replaceable toothed wheel device of toothed wheel cylinder drill, including cylinder drill and the toothed wheel being located in the lower part of cylinder drill, lower flange and upper flange are equipped in the lower part of cylinder drill, toothed wheel is welded in the lower part of connecting plate, the top and bottom of connecting plate are fixedly connected with upper flange and lower flange respectively by bolt.The utility model has the advantages that: first, toothed wheel is equipped with two layers of fixing bolt, and side surface is also equipped with fixing bolt, increase the power of fixed locking, and avoid that bolt is all loose due to shear rock vibration;Second, supporting plate is further equipped between cylinder drill and connecting plate, avoid that bolt is broken due to radial force, improve stability.

Description

Technical Field

[0001] This utility model relates to the field of rotary drilling technology, specifically a replaceable roller cone device for roller cone drills. Background Technology

[0002] Rotary drilling rigs typically use roller cone drill bits for drilling into harder rock formations. These bits have roller cones welded directly to the bottom of the drill barrel, forming a circular surface. The power head drives the drill bit to rotate, and the roller cones at the bottom of the hole exert pressure, crushing, and shearing effects on the rock. After a period of use, the roller cones wear out significantly and need to be replaced. When replacing roller cones, the worn ones are usually cut off with a welding machine, and new roller cones are welded on. However, to save time and costs, construction companies often choose to replace the roller cones on-site. This requires preparing welding machines and oxygen tanks, which is cumbersome. Furthermore, it's difficult to ensure that the welded roller cones are on the same working circular surface, resulting in low dimensional accuracy. This can lead to some newly replaced roller cones wearing out severely, shortening their lifespan and wasting resources.

[0003] For example, a replaceable roller cone device for a roller cone drill with patent document number CN205382881U can be directly bolted to replace the roller cone device at the construction site without on-site welding, reducing processing errors, ensuring the size of the pile hole, improving construction quality, and reducing construction costs. The replaceable roller cone device is designed with corresponding standard dimensions, manufactured according to drawings, and can be randomly replaced at the construction site. It has strong versatility, saves time and effort, and has high work efficiency.

[0004] However, the above-mentioned mechanism has the following problems: First, the fixing and locking are only secured by the two bolts at the bottom. When shearing the rock, the vibration is large and the bolts may loosen. Second, when shearing the rock, there will be an inward radial shearing force on the pressure roller, which makes the bolts prone to breakage. Utility Model Content

[0005] The purpose of this invention is to provide a replaceable roller cone device for roller cone drills to solve the problems existing in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a replaceable roller cone device for a cylindrical drill, comprising a cylindrical drill 8 and a roller cone 1 disposed below the cylindrical drill 8, characterized in that: a lower flange 3 and an upper flange 4 are provided below the cylindrical drill 8, the roller cone 1 is welded to the lower part of a connecting plate 5, and the top and bottom of the connecting plate 5 are fixedly connected to the upper flange 4 and the lower flange 3 respectively by bolts 7.

[0007] Furthermore, the lower flange 3 and the upper flange 4 are also welded together with a number of support plates 6, the same as the connecting plates 5.

[0008] Further, evenly distributed partitions 2 are provided below the lower flange 3 and above the upper flange 4, and they are in the same position. A connecting plate 5 is arranged between adjacent partitions 2.

[0009] Further, the connecting plate 5 is in an "L" shape, and bolts 7 on the connecting plate 5 are symmetrically distributed on both sides of the partition 2.

[0010] Further, a threaded hole with a quantity greater than 1 is provided on the center line of the support plate 6, and it is fixedly connected to the side of the connecting plate 5 through a bolt 7.

[0011] The utility model has the following beneficial effects: First, the cone bit is provided with upper and lower layers of fixing bolts, and fixing bolts are also provided on the side, which increases the fixing and locking force and avoids all bolts from loosening due to the vibration of shearing the rock; Second, a support plate is also provided between the barrel drill and the connecting plate, which avoids the bolt breakage caused by the radial force and improves the stability. Description of the Drawings

[0012] Figure 1 is a schematic structural view of the utility model;

[0013] Figure 2 is Figure 1 the sectional view taken along A-A in

[0014] In the figure: 1, cone bit; 2, partition; 3, lower flange; 4, upper flange; 5, connecting plate; 6, support plate; 7, bolt; 8, barrel drill. Detailed Embodiment

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1-2 , the present utility model provides a technical solution: A replaceable cone bit device for a barrel drill, including a barrel drill 8 and a cone bit 1 provided below the barrel drill 8. A lower flange 3 and an upper flange 4 are provided below the barrel drill 8. A support plate 6 is also welded between the lower flange 3 and the upper flange 4. The outer diameters of the lower flange 3, the upper flange 4 and the support plate 6 are the same. The cone bit 1 is welded below the connecting plate 5. The top and bottom of the connecting plate 5 are respectively fixedly connected to the upper flange 4 and the lower flange 3 through bolts 7. The quantity of the support plates 6 is the same as that of the connecting plates 5.

[0017] Below the lower flange 3 and above the upper flange 4, evenly distributed partition plates 2 are provided, and they are in the same position. The connecting plate 5 is arranged between adjacent partition plates 2. The connecting plate 5 is in a "C" shape, and the bolts 7 on the connecting plate 5 are symmetrically distributed on both sides of the partition plate 2. At the same time, there are more than one threaded holes on the center line of the support plate 6, and it is fixedly connected to the side of the connecting plate 5 through the bolts 7, which improves the locking force and the radial shear force.

[0018] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A replaceable roller cone device for a roller cone spool drill, comprising a spool drill (8) and a roller cone (1) disposed below the spool drill (8), characterized in that: A lower flange (3) and an upper flange (4) are provided below the cylinder drill (8). The cone bit (1) is welded below the connecting plate (5). The top and bottom of the connecting plate (5) are fixedly connected to the upper flange (4) and the lower flange (3) respectively by bolts (7).

2. The replaceable roller cone device for roller cone drills according to claim 1, characterized in that: Support plates (6) with the same number as the connecting plate (5) are also welded between the lower flange (3) and the upper flange (4).

3. The replaceable roller cone device for roller cone drills according to claim 1, characterized in that: Partition plates (2) are evenly provided below the lower flange (3) and above the upper flange (4), and their positions are the same. The connecting plate (5) is arranged between adjacent partition plates (2).

4. The replaceable roller cone device for roller cone drills according to claim 1, characterized in that: The connecting plate (5) is in an "L" shape, and the bolts (7) on the connecting plate (5) are symmetrically distributed on both sides of the partition plate (2).

5. A replaceable roller cone device for a roller cone drill according to claim 2, characterized in that: Threaded holes with a number greater than 1 are provided on the center line of the support plate (6), and the support plate (6) is fixedly connected to the side of the connecting plate (5) by bolts (7).

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