Rock drilling hole protecting device

Abstract

The utility model provides a rock drilling hole protection device which comprises a protection pipe and a slag blocking pipe, the protection pipe is inserted and buried in underground rock soil, the lower end of the slag blocking pipe is fixedly connected with the protection pipe, and the relative height between the upper end of the slag blocking pipe and the ground is not smaller than 300 mm. By the adoption of the technical scheme, in the drilling construction process, if a drill rod or a drill bit is lowered and drilled for multiple times, a large amount of rock ballast or soil slag brought out by the drill rod or the drill bit is accumulated on the periphery of the slag stopping pipe, even if the rock ballast or the soil slag is subjected to external force, the rock ballast or the soil slag cannot fall into a hole again, and therefore the hole is prevented from being blocked, and the service life of the hole is prolonged. And a foundation is laid for improving the drilling or punching construction efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining engineering equipment, in particular to a rock drilling hole protection device. Background Art

[0002] In mining projects, rock drilling is often required. If the borehole diameter is too large and the rock and soil layer at the drilling location is relatively loose, hole collapse is likely to occur, making it impossible for the drill rod or drill bit to drill into the hole in one go. In order to prevent hole collapse during drilling, a casing is usually pushed into the hole while drilling to avoid hole collapse as much as possible.

[0003] In the prior art, a patent document with publication number "CN217233588U" discloses a protective pipe for preventing the collapse of coal mine water exploration and drainage drilling holes, including a protective pipe body, a plurality of protective pipe bodies being detachably connected end to end, one end of the protective pipe body being connected to a protective pipe flange, the protective pipe flange being connected to an orifice gate valve, the outer wall of the protective pipe body being provided with a protective pipe drain hole, and the outer sleeve of the protective pipe body being provided with an orifice water stop sleeve. By adopting this patented technical solution, the protective tube body can be processed by itself according to the drilling construction conditions, saving costs; the protective tube body adopts a segmented structure and is connected with male and female threads, which is convenient for underground transportation and on-site installation, and the overall length is adjustable; the hole mouth is fixedly connected with a protective tube flange to prevent the protective tube body from being flushed out. However, the upper end face of the existing protective tube is generally flush with the end face of the hole mouth. When the drill rod or drill bit is taken out after the hole is formed, the drill rod or drill bit will bring out the stone or soil residue in the hole. If the drill rod or drill bit is lowered and drilled many times, the drill rod or drill bit will bring out a large amount of stone or soil residue. These stone or soil residues accumulate at the edge of the hole mouth. When they are subjected to external force, these stone or soil residues will fall back into the hole, causing the hole to be blocked, affecting the drilling or drilling construction efficiency. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a rock drilling hole protection device.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a rock drilling hole protection device, comprising a protection pipe and a slag blocking pipe, wherein the protection pipe is embedded in underground rock soil, the lower end of the slag blocking pipe is fixedly connected to the protection pipe, and the relative height between the upper end of the slag blocking pipe and the ground is not less than 300mm.

[0007] The protective pipe is in a cylindrical shape, and the slag blocking pipe is in a conical cylindrical shape with a large upper end diameter and a small lower end diameter.

[0008] The protective pipe and the slag blocking pipe are integrally manufactured.

[0009] The diameter of the protective pipe is not less than DN50.

[0010] The height of the protective tube is not less than 200 mm.

[0011] The rock drilling and hole protection device also includes an arc-shaped guide rod, and both ends of the guide rod are respectively welded and fixedly connected to the outer surface of the slag blocking pipe.

[0012] The number of the guide rods is more than 2, and the plurality of guide rods are arranged at equal intervals along the circumferential direction of the outer peripheral surface of the slag blocking pipe.

[0013] At least one end of the guide rod is flush with the upper end surface of the slag blocking pipe.

[0014] The guide rod can be made by bending steel bars.

[0015] The outer diameter of the steel bar is not less than Φ20mm.

[0016] The beneficial effect of the utility model is that: when adopting the technical scheme of the utility model, during drilling construction, if the drill rod or drill bit is lowered and drilled many times, the drill rod or drill bit will bring out a large amount of stone slag or soil slag and accumulate them on the periphery of the slag retaining pipe. Even if these stone slag or soil slag are subjected to external force, the stone slag or soil slag will not fall back into the hole, thereby avoiding blockage of the hole, laying a foundation for improving the efficiency of drilling or chiseling construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model.

[0018] In the figure: 1-protective pipe, 2-slag blocking pipe, 3-guide rod. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0020] like Figure 1 As shown, the utility model provides a rock drilling hole protection device, including a protection pipe 1 and a slag blocking pipe 2. The protection pipe 1 is buried in the underground rock and soil, the lower end of the slag blocking pipe 2 is fixedly connected to the protection pipe, and the relative height between the upper end of the slag blocking pipe 2 and the ground is not less than 300mm.

[0021] By adopting the technical solution of the utility model, during drilling construction, if the drill rod or drill bit is lowered and drilled many times, the drill rod or drill bit will bring out a large amount of stone slag or soil slag and accumulate them on the periphery of the slag retaining pipe. Even if these stone slag or soil slag are subjected to external force, they will not fall back into the hole, thereby avoiding blockage of the hole and laying a foundation for improving the efficiency of drilling or chiseling construction.

[0022] Specifically, the protective pipe 1 is cylindrical, and the slag retaining pipe 2 is a conical cylindrical shape with a large upper end diameter and a small lower end diameter. The protective pipe 1 and the slag retaining pipe 2 are integrally manufactured. Preferably, the diameter of the protective pipe is not less than DN50. The height of the protective pipe 1 is not less than 200 mm. Most of the slag or soil slag of different particle sizes can be blocked at the periphery of the slag retaining pipe to avoid clogging of the holes.

[0023] In addition, the rock drilling and hole protection device also includes an arc-shaped guide rod 3, and the two ends of the guide rod 3 are respectively welded and fixedly connected to the outer surface of the slag retaining pipe 2. The number of guide rods 3 is more than 2, and the plurality of guide rods 3 are arranged at equal intervals along the circumferential direction of the outer peripheral surface of the slag retaining pipe 2. At least one end of the guide rod 3 is flush with the upper end surface of the slag retaining pipe 2. The guide rod 3 can be made by bending steel bars. The outer diameter of the steel bar is not less than Φ20mm. The technical solution of the utility model is adopted, and the arc-shaped guide rod 3 is welded and fixedly connected to the outer surface of the slag retaining pipe 2. On the one hand, the arc-shaped guide rod 3 has a diversion effect on the slag and soil residue brought out by the drill rod or drill bit, so that the slag and soil residue are accumulated as far away from the periphery of the slag retaining pipe 2 as possible; on the other hand, when the drilling construction is completed, the user can hold the arc-shaped guide rod 3 and easily pull out the slag retaining pipe 2.

Claims

1. A rock drilling hole protection device, characterized in that: It comprises a protective pipe (1) and a slag retaining pipe (2), wherein the protective pipe (1) is embedded in underground rock soil, the lower end of the slag retaining pipe (2) is fixedly connected to the protective pipe, and the relative height between the upper end of the slag retaining pipe (2) and the ground is not less than 300 mm.

2. A rock drilling hole protection device according to claim 1, characterized in that: The protective pipe (1) is in the shape of a cylinder, and the slag blocking pipe (2) is in the shape of a conical cylinder with a large upper end diameter and a small lower end diameter.

3. A rock drilling hole protection device according to claim 1 or 2, characterized in that: The protective pipe (1) and the slag blocking pipe (2) are integrally manufactured.

4. A rock drilling hole protection device according to claim 3, characterized in that: The diameter of the protective pipe is not less than DN50.

5. A rock drilling hole protection device according to claim 3, characterized in that: The height of the protective tube (1) is not less than 200 mm.

6. A rock drilling hole protection device according to claim 1, characterized in that: The rock drilling and hole protection device also includes an arc-shaped guide rod (3), and the two ends of the guide rod (3) are respectively welded and fixedly connected to the outer surface of the slag blocking pipe (2).

7. A rock drilling hole protection device according to claim 6, characterized in that: The number of the guide rods (3) is more than 2, and the plurality of guide rods (3) are arranged at equal intervals along the circumferential direction of the outer peripheral surface of the slag blocking pipe (2).

8. A rock drilling hole protection device according to claim 7, characterized in that: At least one end of the guide rod (3) is flush with the upper end surface of the slag blocking pipe (2).

9. A rock drilling hole protection device according to claim 8, characterized in that: The guide rod (3) can be made by bending steel bars.

10. A rock drilling hole protection device according to claim 9, characterized in that: The outer diameter of the steel bar is not less than Φ20mm.

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