CN216341916U - Drill bit of rotary drilling rig - Google Patents

Abstract

The utility model relates to a drill bit of a rotary drilling rig, which comprises a drill cylinder, wherein the upper end of the drill cylinder is connected with the drilling rig, a plurality of cones are arranged on the circumference of the lower end of the drill cylinder, and each cone comprises a support and a cone assembly; the support is fixedly connected with the drill cylinder; the cone assembly is detachably connected with the support; the cone assembly comprises a conical cone disc and a bolt; the cone-shaped tip of the cone disc is provided with a concave platform taking the through hole as a center; the lower end of the support is provided with a connecting column matched with the through hole, and the connecting column is hollow and is provided with internal threads; the connecting rod is provided with a connecting column, a bolt is arranged in the connecting column, so that the cone disc is connected below the support, the connecting strength of the cone and the drill barrel is ensured through the support, and the cone with worn or broken teeth can be conveniently and independently replaced through a detachable cone mounting structure.

Description

Drill bit of rotary drilling rig

Technical Field

The utility model belongs to the technical field of drill bit structure design, and particularly relates to a drill bit of a rotary drilling rig.

Background

The rotary drilling rig is a construction machine for hole forming operation, and the principle of the rotary drilling rig is that a drill rod is driven by a power head to realize that a drilling tool rotates to cut rock soil, then the drilling tool is lifted to the outside of a hole to unload soil, and the drilling tool is periodically operated in a circulating mode until holes are formed; at present, most of rotary drilling drills adopt a single drill bit stone breaking mode to drill, and commonly used drill bits comprise a bucket tooth drill bit, a cutting pick drill bit and a roller bit.

When the rock stratum is constructed, a roller bit is required to be adopted to carry out annular cutting on the rock stratum, the rotation of a revolution roller of the bit grinds, knocks and crushes the rock stratum, a drill core is taken out after the annular cutting is finished, if the drill core cannot be taken out, a double-bottom sand bailing bucket bit cutting bit is required to be adopted to cut the full-section of the drill core, and the drill slag is taken out.

In the conventional rotary drilling rig drill bit applied to rock stratums, a cone is fixedly installed with a drill barrel in a welding mode. The technical defects of the drill bit are that when the teeth of the tooth wheel are worn or broken, the tooth wheel needs to be repaired and replaced by cutting or other methods for destroying the connecting structure, and not only the operation difficulty is high, but also the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to overcome the above problems, and therefore, provides a bit structure that facilitates cone replacement.

The utility model solves the problems and adopts the technical scheme that:

a rotary drilling rig drill bit comprises a drill barrel, wherein the upper end of the drill barrel is connected with a drilling rig, a plurality of cones are arranged on the circumference of the lower end of the drill barrel, and each cone comprises a support and a cone assembly; the support is fixedly connected with the drill cylinder; cone assembly is removably connected to the bearing.

Compared with the prior art, the utility model adopting the technical scheme has the beneficial effects that:

the utility model ensures the connection strength of the cone and the drill barrel through the support, and the cone with worn or broken teeth can be conveniently and independently replaced through the detachable cone mounting structure.

Preferably, the further technical scheme of the utility model is as follows:

the cone assembly comprises a conical cone disc and a bolt; the cone-shaped tip of the cone disc is provided with a concave platform taking the through hole as a center; the lower end of the support is provided with a connecting column matched with the through hole, and the connecting column is hollow and is provided with internal threads; the bolt is arranged in the connecting column, and the top cap of the bolt is embedded into the concave table. According to the scheme, the cone disc is installed at the bottom of the support through the bolt, the bolt and the connecting column are designed to be the center of the cone, the stress is small during excavation, the cone disc is not easy to damage, and the cone disc is convenient to detach and replace through the bolt.

The bottom of the drill cylinder is provided with a positioning groove; the upper part of the support is provided with an I-shaped clamping groove, the I-shaped clamping groove is meshed with the positioning groove, and the support is welded and fixed with the drill cylinder. The effective fixed support position of this interlock structure enlarges the welding range to guarantee welding node intensity.

The lower part of the support is an inclined plane, and the connecting column is perpendicular to the inclined plane. The gear is inclined.

The inclination angle of the inclined plane is 60 degrees.

The supports at the lower end of the drill cylinder are arranged in a staggered manner from the inclined plane to the inside of the drill cylinder to the outside of the drill cylinder. The structure has a large excavation width.

Drawings

FIG. 1 is an overall structural view of the present invention;

FIG. 2 is an exploded view of a cone assembly according to the present invention;

FIG. 3 is a schematic perspective view of an assembly of an abutment and a cone of the present invention;

FIG. 4 is a perspective view of an assembly of a bearing and a cone of the present invention;

FIG. 5 is a schematic view of the structure of the connecting column and the bolt of the present invention;

FIG. 6 is a schematic bottom view of an example cone layout of the present invention;

in the figure: 1. a connecting end; 2. drilling a barrel; 3. a raised ridge; 4. a support; 5. a cone assembly; 2-1, positioning a groove; 4-1, an I-shaped clamping groove; 4-2, inclined plane; 4-3, connecting columns; 5-1, a cone disc; 5-2, positioning bolts; 5-1-1, through holes; 5-1-2, concave platform; 5-2-1, a limiting plate; 5-2-2 and a connecting section.

Detailed Description

The utility model will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the utility model.

Referring to fig. 1, the drill bit of the rotary drilling rig provided by the utility model comprises a drill cylinder, wherein a plurality of cones are arranged on the circumference of the lower end of the drill cylinder. The drill cylinder can be of the structure of the existing drill bit, and spiral convex ridges 3 are distributed on the circumferential outer wall of the drill cylinder 2. The top of the drill cylinder 2 is closed and is provided with a connecting end 1 connected with a drilling machine; the bottom of the drill barrel 2 is an open end, and cones are uniformly arranged on the circumference of the lower end.

The lower circumference of the drill cylinder 2 is provided with a plurality of positioning grooves 2-1, and the positioning grooves 2-1 are arranged at equal intervals and used for positioning the installation position of the cone. In order to increase the strength of the bottom edge of the drill cylinder 2, the end edge is thickened. Specifically, the bottom of the drilling cylinder 2 is provided with a U-shaped positioning groove 2-1; the upper part of the support 4 is provided with an I-shaped clamping groove 4-1, the I-shaped clamping groove 4-1 is meshed with the positioning groove 2-1, and the support 4 is welded and fixed with the drill barrel 2.

The I-shaped clamping groove 4-1 at the top end of the support 4 is matched with the positioning groove 2-1 in size, when the drill bit is installed, the I-shaped vertical part is inserted into the groove hole of the positioning groove 2-1, and the two I-shaped horizontal parts are clamped at the two sides of the positioning groove 2-1 and are respectively attached to the outer surface and the outer surface of the drill cylinder 2. This structure fixes the positions of the pedestal 4 in the front, rear, left, and right directions. And after being occluded with the drill cylinder 2, the support 4 is fixed by welding. The connecting structure of the support 4 and the drill barrel 2 effectively increases the contact surface and the length of a welding seam, thereby enhancing the connection stability.

In the utility model, the support 4 and the cone assembly 5 jointly form a cone structure. As shown in fig. 3 through 5, cone assembly 5 includes a cone disc 5-1 and a set bolt 5-2. The whole body of the pressure wheel disc 5-1 is in a conical structure. The conical surface is densely provided with teeth. The dental disc 5-1 is provided with a through hole 5-1-1 along the central axis, and the conical tip of the dental disc 5-1 is provided with a concave platform 5-1-2 taking the through hole 5-1-1 as the center. The lower end of the support 4 is provided with a connecting column 4-3 matched with the through hole 5-1-1, the connecting column 4-3 is hollow and provided with internal threads, the positioning bolt 5-2 is fixedly connected with the connecting column 4-3 through threads, and the positioning bolt 5-2 clamps the toothed disc 5-1 at the bottom of the support 4.

The positioning bolt 5-2 comprises a threaded end and a top cap, and the top cap comprises a connecting section 5-2-2 and a limiting piece 5-2-1. After the threaded end is completely installed in the connecting column 4-3, the connecting section 5-2-2 is in butt joint with the connecting column 4-3 in the through hole, and the diameters of the connecting section 5-2-2 and the connecting column 4-3 are the same. The diameter of the limiting piece 5-2-1 is larger than that of the connecting section 5-2-2 and the through hole 5-1-1, so that the dental wheel disc 5-1 is clamped at the bottom of the support 4. The total length L1 of the connecting column 4-3 and the connecting section 5-2-2 is slightly larger than the length L2 of the through hole 5-1-1, so that the dental disc 5-1 has a certain degree of freedom of rotation.

The top cap of the bolt is of a structure embedded in the concave table 5-1-2, so that the working of the roller is prevented from being influenced, and the abrasion consumption is reduced.

The lower part of the support 4 is provided with an inclined plane 4-2, and the connecting column 5-3 is arranged perpendicular to the inclined plane 4-2. The angle of inclination of the bevel 4-2 determines the angle of inclination of the disk 5-1. The toothed disc 5-1 can be mounted to incline towards the inside of the drill barrel 2 or can be mounted to incline towards the outside of the drill barrel 2. As shown in fig. 4 and 5, the mounting is performed alternately with the inward slant mounting and the outward slant mounting. The slope is inclined at an angle of 45 ° to 75 °, preferably 60 °.

This neotype beneficial effect is: the traditional drill barrel integrated cone structure is improved into a detachable structure formed by assembling a support, a cone pulley disc and a positioning bolt, and the cone pulley disc can be freely replaced when teeth on the pressing wheel disc are worn or broken. Compared with the original drill bit structure, the utility model only needs to reserve the pressure wheel disc in advance, and when the tooth fault occurs on site, the tooth wheel disc can be replaced independently. The replacement process does not involve the damage cutting of the structure, so that the maintenance difficulty is greatly reduced, the cost is reduced, and the working hours can be greatly saved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims (6)

1. The utility model provides a dig rig drill bit soon, includes and bores a section of thick bamboo, bores a section of thick bamboo upper end and links to each other with the rig, bores a section of thick bamboo lower extreme circumference and is provided with a plurality of cones, its characterized in that: the cone comprises a bearing and a cone assembly; the support is fixedly connected with the drill cylinder; cone assembly is removably connected to the bearing.

2. The rotary drilling rig drill bit according to claim 1, characterized in that: the cone assembly comprises a conical cone disc and a bolt; the cone-shaped tip of the cone disc is provided with a concave platform taking the through hole as a center; the lower end of the support is provided with a connecting column matched with the through hole, and the connecting column is hollow and is provided with internal threads; the bolt is arranged in the connecting column, so that the toothed disc is connected below the support in a stop mode.

3. The rotary drilling rig drill bit according to claim 1, characterized in that: the bottom of the drill cylinder is provided with a positioning groove; the upper part of the support is provided with an I-shaped clamping groove, the I-shaped clamping groove is meshed with the positioning groove, and the support is welded and fixed with the drill cylinder.

4. The rotary drilling rig drill bit according to claim 2, characterized in that: the lower part of the support is an inclined plane, and the connecting column is perpendicular to the inclined plane.

5. The rotary drilling rig drill bit according to claim 4, characterized in that: the inclination angle of the inclined plane is 60 degrees.

6. The rotary drilling rig drill bit according to claim 4, characterized in that: the supports at the lower end of the drill cylinder are arranged in a staggered manner from the inclined plane to the inside of the drill cylinder to the outside of the drill cylinder.

Images