Cylindrical drill bit for rotary drilling of steep rock in karst area

Abstract

The utility model relates to the technical field of drilling engineering, in particular to a karst area steep rock rotary excavating hole forming barrel type drill bit which comprises a drill bit body, the drill bit body is conical and is fixedly welded to the bottom end of a drill barrel, an ash storage bin is arranged in the drill barrel, and the inner wall of the bottom of the drill bit body is fixedly welded to the bottom end of a driving rod. An ash inlet is formed in the outer wall of the drill bit, a plurality of drill teeth are further welded and fixed to the outer wall of the drill bit, and a partition plate is arranged between every two adjacent drill teeth; the outer wall of the drilling barrel is fixedly welded to a fixing barrel through a connecting rod, and a pressing barrel is arranged at the bottom end of the fixing barrel. In the process that the drill bit continuously drills downwards, the hole wall is firstly subjected to chambering compaction through the compaction cylinder and then attached to the fixing cylinder to achieve the technical effect that the hole wall is fixed after compaction, the traditional mode that slurry is poured for supporting is replaced, it is guaranteed that holes cannot collapse in the rotary excavating process, and the rotary excavating efficiency is improved. And meanwhile, the safety problem that rotary excavating water-soluble rock pouring mortar in the karst area is prone to collapse is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling engineering, in particular to a cylindrical drill bit for rotary drilling of steep rocks in karst areas. Background Art

[0002] Rotary drilling is a drilling technology that uses mud to protect the wall. The turntable or power head on the rotary drilling rig drives the retractable drill rod and the drill bit at the bottom of the drill rod to rotate, and the cutting tools on the bottom end and side opening of the drill bucket are used to cut the rock and soil. At the same time, the cut rock and soil enter the drill bucket from the opening. After the drill bucket is filled with drill cuttings, the drill bit is lifted to the hole mouth through the retractable drill rod, the bottom of the hole is automatically opened and the soil is unloaded, and then the drill bucket is lowered to the bottom of the hole to continue drilling. This process is repeated until the designed hole depth is reached.

[0003] However, during the actual construction process, technicians found that when conducting rotary drilling operations on steep rocks in karst areas, due to the serious desertification of the mountains in the karst area and the fact that most of the mountains are composed of soluble rocks, the traditional method of injecting mud for reinforcement while drilling cannot be used. This will cause the rock on the hole wall to dissolve in water and continue to flow away, greatly increasing the risk of collapse. Utility Model Content

[0004] In order to solve the problems raised in the above-mentioned background technology, the utility model provides a cylindrical drill bit for rotary drilling of steep rocks in karst areas. The cylindrical drill bit for rotary drilling of steep rocks in karst areas provided by the utility model replaces the traditional method of supporting by pouring mud, ensuring that the hole will not collapse during the rotary drilling process, and at the same time solves the safety problem of easy collapse of mortar poured when rotary drilling water-soluble rocks in karst areas.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A rotary drill bit for drilling holes in steep rocks in karst areas comprises a drill bit, the drill bit being conical in shape and welded to the bottom end of a drill barrel. An ash storage bin is provided in the drill barrel, and the bottom inner wall of the drill bit is welded to the bottom end of a drive rod. An ash inlet is provided on the outer wall of the drill bit, the ash inlet being connected to the ash storage bin. A plurality of drill teeth are also welded to the outer wall of the drill bit, and partitions are provided between adjacent drill teeth.

[0007] The outer wall of the drill tube is welded and fixed to the fixing tube through a connecting rod, and a pressing tube is provided at the bottom end of the fixing tube.

[0008] Furthermore, the direction of the top of the drill tooth is perpendicular to the oblique side on which it is located.

[0009] Furthermore, the height of the partition is 0.2-0.6 times the height of the drill teeth.

[0010] Furthermore, the height of the partition is 0.4 times the height of the drill teeth.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] Driven by the rotation of the driving rod, the drill bit can perform rotary drilling. During this process, the drill teeth can crush the steep rock below. At the same time, the crushed rock is pushed into the ash inlet under the joint action of the drill teeth and the partition, and finally the rock is collected in the ash storage bin. In the process of continuous drilling of the drill bit, the hole wall is first expanded and compacted by the compacting cylinder, and then fitted with the fixing cylinder to achieve the technical effect of fixing the hole wall after compaction, replacing the traditional method of supporting by pouring mud, ensuring that the hole will not collapse during rotary drilling, and solving the safety problem of easy collapse of mortar poured in rotary drilling of water-soluble rocks in karst areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention.

[0014] Figure 1 The utility model is a structural schematic diagram of a cylindrical drill bit for rotary drilling of steep rocks in karst areas.

[0015] Figure 2 for Figure 1 An overhead view of a cylindrical drill bit used for rotary drilling of holes in steep rock in karst areas.

[0016] Figure 3 for Figure 1 Enlarged view of part A.

[0017] The reference numerals are as follows:

[0018] 1. Drill bit; 2. Drill teeth; 21. Spire; 3. Ash inlet; 4. Partition; 5. Drill barrel; 6. Ash storage bin; 7. Drive rod; 8. Pressing barrel; 9. Fixing barrel; 10. Connecting rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The following describes in detail the specific implementation of the utility model of the rotary drilling and hole-forming barrel drill bit for steep rocks in karst areas in conjunction with specific embodiments.

[0021] In an embodiment of the utility model, a cylindrical drill bit for rotary drilling of steep rocks in karst areas is provided. The cylindrical drill bit for rotary drilling of steep rocks in karst areas provided by the utility model replaces the traditional method of supporting by pouring mud, ensuring that the hole will not collapse during the rotary drilling process, and at the same time solves the safety problem of easy collapse of mortar poured into water-soluble rocks in rotary drilling in karst areas.

[0022] For details, please refer to Figure 1-Figure 3 The utility model is a rotary drilling barrel drill bit for steep rocks in karst areas, comprising a drill bit 1, which is conical and welded to the bottom end of a drill barrel 5. An ash storage bin 6 is provided in the drill barrel 5. The bottom inner wall of the drill bit 1 is welded to the bottom end of a driving rod 7. Under the rotation drive of the driving rod 7, the drill bit 1 can be rotary drilled.

[0023] Furthermore, the drill bit 1 provided by the present invention is provided with an ash inlet 3 on its outer wall, which is connected to an ash storage bin 6. A plurality of drill teeth 2 are welded and fixed to the outer wall of the drill bit 1, and a partition 4 is provided between adjacent drill teeth 2. The drill teeth 2 can crush the steep rock below, and the crushed rock is pushed into the ash inlet 3 by the combined action of the drill teeth 2 and the partition 4.

[0024] The outer wall of the drill tube 5 is welded and fixed to the fixing tube 9 via a connecting rod 10 , and a pressing tube 8 is provided at the bottom end of the fixing tube 9 .

[0025] Preferably, in the embodiment of the present invention, the direction of the top 21 of the drill tooth 2 is perpendicular to the oblique side thereof, which effectively improves the effect of the drill tooth 2 in crushing the steep rock below;

[0026] Furthermore, in an embodiment of the present invention, the height of the partition 4 is 0.2-0.6 times the height of the drill tooth 2 ; preferably, the height of the partition 4 is 0.4 times the height of the drill tooth 2 .

[0027] The working principle of this utility model is:

[0028] Driven by the rotation of the driving rod 7, the drill bit 1 can perform rotary drilling. During this process, the drill teeth 2 can crush the steep rock below. At the same time, the crushed rock is pushed into the ash inlet 3 under the joint action of the drill teeth 2 and the partition 4. Finally, the rock is collected in the ash storage bin 6. In the process of continuous drilling by the drill bit 1, the hole wall is first expanded and compacted by the compacting cylinder 8, and then fitted with the fixing cylinder 9 to achieve the technical effect of fixing the hole wall after compaction.

[0029] In summary, the utility model of the rotary drilling barrel drill bit for steep rock in karst areas replaces the traditional method of injecting mud for support, ensuring that the hole will not collapse during the rotary drilling process, and at the same time solves the safety problem of easy collapse when injecting mortar into water-soluble rocks during rotary drilling in karst areas.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cylindrical drill bit for rotary drilling of steep rocks in karst areas, comprising a drill bit (1), characterized in that: The drill bit (1) is welded and fixed to the bottom end of the drill barrel (5), and an ash storage bin (6) is provided in the drill barrel (5); The bottom inner wall of the drill bit (1) is welded and fixed to the bottom end of the driving rod (7); An ash inlet (3) is provided on the outer wall of the drill bit (1), and the ash inlet (3) is connected to the ash storage bin (6); a plurality of drill teeth (2) are welded and fixed on the outer wall of the drill bit (1), and a partition plate (4) is provided between adjacent drill teeth (2); The outer wall of the drill tube (5) is welded and fixed to the fixing tube (9) via a connecting rod (10), and a pressing tube (8) is provided at the bottom end of the fixing tube (9).

2. The cylindrical drill bit for rotary drilling of steep rocks in karst areas according to claim 1, characterized in that: The direction of the top (21) of the drill tooth (2) is perpendicular to the oblique side where it is located.

3. A cylindrical drill bit for rotary drilling of steep rocks in karst areas according to claim 1 or 2, characterized in that: The height of the partition (4) is 0.2-0.6 times the height of the drill teeth (2).

4. The cylindrical drill bit for rotary drilling of steep rocks in karst areas according to claim 3, characterized in that: The height of the partition (4) is 0.4 times the height of the drill teeth (2).

5. The cylindrical drill bit for rotary drilling of steep rocks in karst areas according to claim 4, characterized in that: The drill bit (1) is conical.

Images