High-wind-pressure impactor for geological drilling

Abstract

A tunneling drill is arranged on the head portion of a drill body, a plurality of vertical teeth are vertically and evenly distributed on the edge of the tunneling drill, a plurality of flat teeth are evenly distributed on the head portion of the tunneling drill, a hole with the small diameter can be drilled through the tunneling drill in the drilling process, a plurality of drill wings are evenly distributed on the periphery of the tail portion of the tunneling drill on the drill body, and the vertical teeth are evenly distributed on the periphery of the tail portion of the tunneling drill. The alloy teeth are arranged on the face, close to the tunneling drill, of the drill wing, the alloy teeth further expand the hole, and therefore final hole forming is achieved in the mode that the tunneling drill is used for drilling small holes firstly and then the alloy teeth on the drill wing are used for drilling large holes, and due to the fact that the contact area between the tunneling drill and the alloy teeth on the drill wing and the drilling position is small, drilling resistance is small, and drilling efficiency is improved. And the diameter of the tunneling drill is small, so that positioning is easy, the large-diameter drilling requirement can be met, and the drilling speed can be increased.

Description

Technical Field

[0001] The utility model belongs to the field of geological drilling tools, in particular to a high-pressure impactor for geological drilling. Background Art

[0002] Geological drilling is a mechanical engineering technology that utilizes deep drilling. When drilling large geological holes under high wind pressure, in order to improve work efficiency and meet actual production technical requirements, larger diameter drilling tools are required. However, due to the large contact area between large diameter drilling tools and the drilling site, large resistance is caused, high energy consumption, and slow drilling speed. In actual operation, the drilling speed is slow, and the drill bit is not easy to accurately position, so there is room for improvement in work efficiency. Utility Model Content

[0003] (1) Technical problem to be solved: How to realize a high-pressure impactor for geological drilling that can meet the requirements of large-diameter drilling and increase the drilling speed.

[0004] (2) The technical solutions adopted by this utility model are as follows:

[0005] A high-pressure impactor for geological drilling comprises a drill body, a tunneling drill being provided at the head of the drill body, a plurality of vertical teeth being evenly distributed vertically on the edge of the tunneling drill, a first chip removal groove being provided between two adjacent vertical teeth, a plurality of flat teeth being evenly distributed at the head of the tunneling drill, a plurality of drill wings being evenly distributed around the tail of the tunneling drill on the drill body, alloy teeth being provided on the side of the drill wings close to the tunneling drill, a second chip removal groove being provided between two adjacent drill wings, and a connecting end being provided at the tail of the drill body.

[0006] A further technical solution is that a mounting groove is provided on the top of the drill wing, a pick is provided in the mounting groove, alloy teeth are provided on the pick, a threaded hole is provided on the side of the drill wing, the threaded hole is threadedly connected to a countersunk fastening screw, and the end of the countersunk fastening screw presses the pick tightly.

[0007] A further technical solution is that the alloy teeth, vertical teeth and flat teeth are all blade-shaped flaky tungsten-cobalt cemented carbide with a hardness between HRA89 and HRA93 and good wear resistance.

[0008] A further technical solution is that a hexagonal connecting hole is provided at the connecting end, and a high-pressure air hole is provided inside the drill body. The high-pressure air hole passes through the drill body and is provided along the direction from the head of the drill body to the connecting hole.

[0009] (3) Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0010] The head of the drill body is provided with a tunneling drill, and a plurality of vertical teeth are evenly distributed vertically on the edge of the tunneling drill, and a plurality of flat teeth are evenly distributed on the head of the tunneling drill. When drilling, the tunneling drill can first drill a hole with a smaller diameter. A plurality of drill wings are evenly distributed around the tail of the tunneling drill on the drill body. The drill wings are provided with alloy teeth on the side close to the tunneling drill, and the alloy teeth further expand the hole. In this way, a small hole is first drilled by the tunneling drill and then a large hole is drilled by the alloy teeth on the drill wings to achieve the final hole. Since the contact area between the tunneling drill and the alloy teeth on the drill wings and the drilling part is small, the resistance to drilling is small, and the tunneling drill is relatively easy to position due to its small diameter, thereby meeting the requirements of large-diameter drilling and increasing the drilling speed.

[0011] The utility model has a simple structural design and is easy to operate. By drilling a small hole first and then expanding the hole, the multi-step surface self-positioning is realized, which avoids the problem of difficult positioning of the expanded hole in actual production, makes the drilling and expanding hole positioning accurate, the footage speed fast, the hole standard, and can ensure the consistency of the hole size.

[0012] The first and second chip removal grooves can ensure that the rock chips can be discharged smoothly, avoiding repeated crushing and greatly extending the service life of the impactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall cross section of the utility model;

[0014] Figure 2 The main view of the utility model;

[0015] Figure 3 It is a cross-sectional view corresponding to another cross section of the present invention;

[0016] Figure 4 It is a top view schematic diagram of the utility model;

[0017] Figure 5 It is a bottom view schematic diagram of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-Figure 5 A high-pressure impactor for geological drilling comprises a drill body 1, a tunneling drill 2 disposed at the head of the drill body 1, a plurality of vertical teeth 3 evenly distributed vertically along the edge of the tunneling drill 2, a chip removal groove 4 disposed between adjacent vertical teeth 3, a plurality of flat teeth 5 evenly distributed around the head of the tunneling drill 2, a plurality of drill wings 6 evenly distributed around the rear end of the tunneling drill 2 on the drill body 1, alloy teeth 7 disposed on the side of the drill wings 6 proximal to the tunneling drill 2, a chip removal groove 8 disposed between adjacent drill wings 6, and a connecting end 9 disposed at the rear end of the drill body 1.

[0020] During use, after the connection end 9 of the high-pressure impactor for geological drilling is connected to the drill rod of the drilling rig, the drilling position is determined. Since the excavation drill 2 first contacts the drilling part, the excavation drill 2 first drills a hole with a smaller diameter, and then the alloy teeth 7 on the drill wing 6 contact the drilling part again, thereby enlarging the hole through the alloy teeth 7 to achieve the final hole. During the drilling process, the chip groove 1 4 and the chip groove 2 8 can ensure that the rock debris can be discharged smoothly.

[0021] The top of the drill wing 6 is provided with a mounting groove 10, in which a pick 11 is provided, and the alloy tooth 7 is mounted on the pick 11. The side of the drill wing 6 is provided with a threaded hole 12, and the internal thread of the threaded hole 12 is threadedly connected to a countersunk fastening screw 13, and the end of the countersunk fastening screw 13 is tightened against the pick 11. This structure facilitates the quick disassembly and installation of the alloy tooth 7 for replacement. When disassembling, the countersunk fastening screw 13 is loosened, the pick 11 and the alloy tooth 7 are removed as a whole, and after replacement, the countersunk fastening screw 13 can be tightened again.

[0022] The alloy teeth 7, vertical teeth 3 and flat teeth 5 are all made of blade-shaped flaky tungsten-cobalt cemented carbide with a hardness between HRA89 and HRA93 and good wear resistance.

[0023] The connecting end 9 is provided with a hexagonal connecting hole 14, and the drill body 1 is provided with a high-pressure air hole 15. The high-pressure air hole 15 passes through the drill body 1 and is arranged along the direction from the head of the drill body 1 to the connecting hole. The high-pressure air hole 15 is used to pass high-pressure gas to cool the drill body 1 and further enhance the slag removal effect.

[0024] The above are only preferred embodiments of the present invention.

Claims

1. A high-pressure impactor for geological drilling, characterized in that: The invention comprises a drill body (1), wherein the head of the drill body (1) is provided with a tunneling drill (2), a plurality of vertical teeth (3) are evenly distributed vertically on the edge of the tunneling drill (2), a chip removal groove (4) is provided between two adjacent vertical teeth (3), a plurality of flat teeth (5) are evenly distributed on the head of the tunneling drill (2), a plurality of drill wings (6) are evenly distributed around the tail of the tunneling drill (2) on the drill body (1), alloy teeth (7) are provided on the drill wings (6) on a side close to the tunneling drill (2), a chip removal groove (8) is provided between two adjacent drill wings (6), and a connecting end (9) is provided at the tail of the drill body (1).

2. A high-pressure impactor for geological drilling according to claim 1, characterized in that: The top of the drill wing (6) is provided with a mounting groove (10), a pick (11) is provided in the mounting groove (10), the alloy tooth (7) is provided on the pick (11), and a threaded hole (12) is provided on the side of the drill wing (6), the threaded hole (12) is internally threadedly connected to a countersunk fastening screw (13), and the end of the countersunk fastening screw (13) is pressed against the pick (11).

3. A high-pressure impactor for geological drilling according to claim 1, characterized in that: The alloy teeth (7), vertical teeth (3), and flat teeth (5) are all blade-shaped flaky tungsten-cobalt hard alloys with a hardness between HRA89 and HRA93.

4. A high-pressure impactor for geological drilling according to claim 1, characterized in that: The connecting end (9) is provided with a hexagonal connecting hole (14), and a high-pressure air hole (15) is provided inside the drill body (1). The high-pressure air hole (15) passes through the drill body (1) and is provided along the direction from the head of the drill body (1) to the connecting hole.

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