Nested composite PDC (polycrystalline diamond compact) bit cutting pick cylindrical drill

Abstract

The utility model relates to the technical field of cutting tooth cylindrical drills, in particular to a nested composite PDC drill bit cutting tooth cylindrical drill which comprises a cylindrical drill body and a connecting plate arranged above the cylindrical drill body, a PDC drill bit is arranged below the cylindrical drill body and welded below a cutting tooth seat, and the cutting tooth seat is fixedly connected with a connecting seat evenly welded to the cylindrical drill body through bolts. The drill bit has the advantages that the drill bit can be replaced, welding is not needed, and replacement is convenient; secondly, the angle can be adjusted, and a nesting mode is used, so that the connection is firmer; and 3, the drill bits can be ensured to be in the same circle center during each replacement.

Description

Technical Field

[0001] This utility model relates to the field of cutting tooth cylinder drilling technology, specifically a nested composite PDC drill bit cutting tooth cylinder drill. Background Technology

[0002] A cutting tooth barrel drill is a type of drill bit with cutting teeth installed at the bottom of the barrel drill. It can break rock strata and cut around the perimeter, increasing the free surface for subsequent construction. It is used in tunneling machinery. In the process of use, for bedrock strata with high hardness, great depth and difficult construction, a cutting tooth barrel drill with replaceable drill bits is often needed.

[0003] For example, the cutting tooth cylinder drill with patent document number CN213743261U includes a square head seat, with reinforcing plates fixedly connected to both sides of the square head seat, a connecting plate fixedly connected to the bottom of the square head seat, a cylinder fixedly connected to the bottom of the connecting plate, wear-resistant ribs fixedly connected to the outer side of the cylinder, a first cutting tooth seat fixedly connected to one side of the bottom of the cylinder, a first cutting tooth fixedly connected to the bottom of the first cutting tooth seat, and a second cutting tooth seat fixedly connected to the other side of the bottom of the cylinder, with a second cutting tooth fixedly connected to the bottom of the second cutting tooth seat. Through the arrangement of the cylinder, the first cutting tooth seat, the square head seat, the reinforcing plate, the first cutting tooth, the second cutting tooth seat, and the second cutting tooth, the drilling efficiency of the drill bit is high.

[0004] However, the following problems exist: when the cutting tooth is damaged or broken and the drill bit needs to be replaced, the cutting tooth holder needs to be cut off and then welded, which is inefficient and cannot guarantee that the welded cutting tooth holder is on the same center. Utility Model Content

[0005] The purpose of this invention is to provide a nested composite PDC drill bit cutting tooth cylinder drill to solve the problems existing in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a nested composite PDC drill bit cutting tooth cylinder drill, including a cylinder drill body 3, a connecting plate 4 disposed above the cylinder drill body 3, and a PDC drill bit 1 disposed below the cylinder drill body 3, characterized in that: the PDC drill bit 1 is welded to the bottom of the cutting tooth seat 9, and the cutting tooth seat 9 is fixedly connected to the connecting seat 2 uniformly welded to the cylinder drill body 3 by bolts.

[0007] Furthermore, a splined shaft 7 is provided above the center of the cutting tooth holder 9, and the cutting tooth holder 9 is provided with more than 6 evenly distributed adjustment grooves 8.

[0008] Furthermore, the connecting seat 2 has an internal spline 5 located below its center, which mates with the spline shaft 7.

[0009] Furthermore, the bottom of the connecting seat 2 is provided with evenly distributed locking threads 6.

[0010] Furthermore, the spline shaft 7 has more than 36 splines.

[0011] Furthermore, the adjustment groove 8 is arc-shaped.

[0012] This utility model has the following advantages: First, the drill bit is replaceable without welding, making replacement convenient; second, the angle is adjustable, and the nested method ensures a tighter connection; third, each replacement ensures that the drill bit is in the same center. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure below the main body (3) of the middle cylinder drill;

[0015] Figure 3 yes Figure 1 A schematic diagram of the structure of the PDC drill bit (1) and the cutting tooth holder (9).

[0016] In the diagram: 1. PDC drill bit, 2. Connecting seat, 3. Drill body, 4. Connecting plate, 5. Internal spline, 6. Locking thread, 7. Spline shaft, 8. Adjusting groove, 9. Cutting tooth holder. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a technical solution: a nested composite PDC drill bit cutting tooth cylinder drill, including a cylinder drill body 3, a connecting plate 4 disposed above the cylinder drill body 3, and a PDC drill bit 1 disposed below the cylinder drill body 3.

[0019] The PDC drill bit 1 is welded to the bottom of the cutting tooth holder 9. A splined shaft 7 is provided above the center of the cutting tooth holder 9. The splined shaft 7 has more than 36 splines. The cutting tooth holder 9 has more than 6 evenly distributed adjustment grooves 8. The adjustment grooves 8 are arc-shaped grooves, which facilitate the adjustment of the angle of the PDC drill bit 1. At the same time, the arc-shaped grooves of the adjustment grooves 8 are easy to adapt to locking at various angles.

[0020] More than 10 connecting seats 2 are evenly welded to the bottom of the barrel drill body 3. The evenly distributed connecting seats 2 are at the same center as the barrel drill body 3. At the same time, an internal spline 5 that mates with the spline shaft 7 is provided below the center of the connecting seat 2. The bottom of the connecting seat 2 is also provided with evenly distributed locking threads 6, the number of which is equal to that of the adjusting groove 8.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nested composite PDC drill bit cutting tooth cylinder, comprising a cylinder body (3), a connecting plate (4) disposed above the cylinder body (3), and a PDC drill bit (1) disposed below the cylinder body (3), characterized in that: The PDC drill bit (1) is welded to the bottom of the cutting tooth seat (9), and the cutting tooth seat (9) is fixedly connected to the connecting seat (2) of the barrel drill body (3) by bolts.

2. The nested composite PDC drill bit cutter barrel according to claim 1, characterized in that: The center of the cutting tooth holder (9) is provided with a spline shaft (7), and the cutting tooth holder (9) is provided with more than 6 evenly distributed adjustment grooves (8).

3. The nested composite PDC drill bit cutter barrel according to claim 1, characterized in that: The connecting seat (2) has an internal spline (5) below its center that mates with the spline shaft (7).

4. A nested composite PDC drill bit cutting tool cylinder according to claim 3, characterized in that: The bottom of the connecting seat (2) is provided with evenly distributed locking threads (6).

5. A nested composite PDC drill bit cutting tool cylinder according to claim 2, characterized in that: The number of splines on the spline shaft (7) is greater than 36.

6. A nested composite PDC drill bit cutting tool cylinder according to claim 2, characterized in that: The adjustment groove (8) is arc-shaped.

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