Mounting structure of drill bit of rock-soil drilling machine

Abstract

The utility model discloses an installation structure of a rock-soil drilling machine drill bit, and relates to the technical field of installation structures of drill bits. The mounting structure of the drill bit of the rock-soil drilling machine comprises an outer pipe assembly, an inner pipe, a reamer, a buffer unit, a double-pipe drill bit and a double-pipe drilling tool connecting assembly, and the buffer unit is convenient for buffering the mounting structure during drilling. According to the mounting structure of the rock-soil drilling machine drill bit, the structure that the buffer unit is arranged between the inner pipes is adopted, large impact force can be buffered conveniently when the drill bit drills, parts in the outer pipe assembly are effectively protected, the large impact force is prevented from damaging the internal parts, meanwhile, the outer pipe assembly is composed of the steel pipe and the seamless steel pipe which are subjected to surface hardening treatment, and the service life of the outer pipe assembly is prolonged. The drilling fluid has high bending strength and anti-fatigue performance, and drilling stability is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of drill bit installation structure, specifically an installation structure for a drill bit of a rock and soil drilling rig. Background Technology

[0002] In the field of modern geotechnical engineering, efficient and precise drilling operations are of paramount importance. The installation structure of drill bits for geotechnical drilling rigs is constantly being innovated. Through precise mechanical design, a stable connection between the drill bit and the drill rod is achieved, ensuring the stability and reliability of drilling and greatly improving drilling efficiency and safety.

[0003] The installation structure of the drill bit in a rock and soil drilling rig is a core component that ensures a reliable connection between the drill bit and the rig body, enabling efficient drilling operations. Its design must consider force transmission, stability, replaceability, and adaptability. Some drilling rigs use an outer tube and an inner tube working together to facilitate drill bit installation. However, in structures where the outer and inner tubes are directly connected to the drill bit, the impact force during initial drilling is directly applied to the drill bit and the installation structure, easily causing component damage, leading to severe wear of internal parts and increased maintenance costs. To address the shortcomings of existing technologies, this utility model provides an installation structure for a rock and soil drilling rig drill bit to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an installation structure for a drill bit of a rock and soil drilling rig, which solves the problem that the impact force when the drill bit first enters the hole acts directly on the drill bit and the installation structure, easily causing damage to components, resulting in severe wear of internal parts and increased maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an installation structure for a drill bit of a rock and soil drilling rig, comprising:

[0006] An outer tube assembly, comprising a first protective layer and a second protective layer, the outer tube assembly being used to protect internal components;

[0007] The inner tube is located inside the outer tube assembly;

[0008] A reamer, its threaded connection is to the top of the inner tube;

[0009] A buffer unit, comprising a rubber pad fixedly connected inside the inner tube, the buffer unit facilitating buffering of the installation structure during drilling;

[0010] A double-tube drill bit, its threaded connection is to the top of the reamer;

[0011] The dual-tube drill string connection assembly is located at the bottom of the inner tube, and the second protective layer is connected to the dual-tube drill string connection assembly.

[0012] Preferably, the buffer unit further includes:

[0013] The connecting plate is fixedly connected to the rubber pad.

[0014] The buffer spring is fixedly connected between the connecting plates.

[0015] Preferably, the outer pipe assembly is provided with a track body, the first protective layer is fixedly connected with a track block, and the track block is slidingly connected in the track body.

[0016] Preferably, the inner pipe is provided with a stub at the upper end, and the reamer abuts against the stub.

[0017] Preferably, the stub is provided with a clamping seat, and the clamping seat is clamped with the double-tube drill bit.

[0018] Preferably, the first protective layer is made of a surface-hardened steel pipe, and the second protective layer is made of a seamless steel pipe.

[0019] The utility model discloses a rock and earth drilling machine drill bit's mounting structure, and it has the beneficial effects as follows:

[0020] The rock and earth drilling machine drill bit's mounting structure sets up the buffer unit between the inner pipe, and it is convenient to buffer the greater impact force when the drill bit drills into, effectively protects the parts in the outer pipe assembly, prevents the greater impact force from damaging the internal parts, and meanwhile, the outer pipe assembly is composed of the surface-hardened steel pipe and the seamless steel pipe, has high bending strength and fatigue resistance, and ensures drilling stability. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to these drawings without paying creative labor.

[0022] Figure 1 It is the whole structure schematic diagram of the utility model;

[0023] Figure 2 It is the inner pipe structure schematic diagram of the utility model;

[0024] Figure 3 It is the buffer unit structure schematic diagram of the utility model;

[0025] Figure 4 It is the double-tube drill bit structure schematic diagram of the utility model.

[0026] As shown in the figure: 1, outer tube assembly; 11, first protective layer; 111, track block; 112, track main body; 12, second protective layer; 2, inner tube; 3, reamer; 31, short circuit; 32, card seat; 4, buffer unit; 41, rubber pad; 42, connecting plate; 43, buffer spring; 5, double tube drill bit; 6, double tube drilling tool connecting assembly. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme in the embodiments of the utility model is described clearly and completely, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] The embodiments of the present application provide a mounting structure of a rock-soil drilling machine drill bit, which solves the problem that the impact force when the drill bit just drills is directly applied to the drill bit and the mounting structure, which easily causes component damage, leads to serious wear of internal parts, and increases maintenance cost, realizes the structure of setting a buffer unit 4 between the inner tubes 2, facilitates buffering of the larger impact force when the drill bit just drills, effectively protects the internal parts of the outer tube assembly 1, prevents the larger impact force from damaging the internal parts, and simultaneously the outer tube assembly 1 is composed of a surface-hardened steel pipe and a seamless steel pipe, has high bending strength and fatigue resistance, and ensures drilling stability.

[0029] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and specific embodiments.

[0030] Embodiment one;

[0031] The embodiments of the utility model disclose a mounting structure of a rock-soil drilling machine drill bit, according to the attached Figures 1-4 As shown in the figure, it comprises:

[0032] The outer tube assembly 1 comprises a first protective layer 11 and a second protective layer 12, the outer tube assembly 1 is used for protecting internal parts, the outer tube assembly 1 is composed of a surface-hardened steel pipe and a seamless steel pipe, has high bending strength and fatigue resistance, and ensures drilling stability;

[0033] The inner tube 2 is arranged in the outer tube assembly 1, the inner tube 2 remains stationary during drilling, is used for accommodating and protecting a rock core, avoids the rock core from being damaged by vibration, swing and friction force during drilling, and guarantees the integrity and purity of the rock core;

[0034] A reamer 3 is threadedly connected to the top of the inner pipe 2, and the reamer 3 is used to expand the diameter of the drilled hole, improve the quality of the hole wall, and provide a suitable condition for the installation of the double-pipe drill bit 5 in the subsequent process;

[0035] A buffer unit 4 is fixedly connected to the inner pipe 2, and the buffer unit 4 is used to buffer the installation structure during drilling;

[0036] The double-pipe drill bit 5 is threadedly connected to the top of the reamer 3, and the double-pipe drill bit 5 is used to improve the core recovery rate, protect the integrity of the core, and adapt to the drilling requirements of complex strata;

[0037] A double-pipe drilling tool connecting assembly 6 is arranged at the bottom of the inner pipe 2, and the second protective layer 12 is connected to the double-pipe drilling tool connecting assembly 6.

[0038] A track main body 112 is arranged in the outer pipe assembly 1, and a track block 111 is fixedly connected to the first protective layer 11 and is slidably connected to the track main body 112.

[0039] A short circuit 31 is arranged at the upper end of the inner pipe 2, and the reamer 3 abuts against the short circuit 31.

[0040] A clamping seat 32 is arranged on the short circuit 31, and the clamping seat 32 is clamped with the double-pipe drill bit 5.

[0041] The first protective layer 11 is made of a steel pipe with surface hardening treatment, and the second protective layer 12 is made of a seamless steel pipe.

[0042] After the corresponding drill bit is installed, the double-pipe drilling tool connecting assembly 6 is assembled with the connecting piece of the drilling machine, after the assembly is completed, the outer pipe assembly 1 is rotated by the rotary device on the drilling machine, and the double-pipe drill bit 5 starts to cut the rock, so that the rock can be drilled efficiently and stably, and the outer pipe assembly 1 is composed of a steel pipe with surface hardening treatment and a seamless steel pipe, has high bending strength and fatigue resistance, and ensures the drilling stability.

[0043] Embodiment two;

[0044] The utility model embodiment discloses a rock and earth drilling machine drill bit's installation structure, according to the attached Figures 1-4 As shown in the figure, comprising:

[0045] The outer pipe assembly 1 comprises a first protective layer 11 and a second protective layer 12, and is used for protecting internal parts; the outer pipe assembly 1 is composed of a steel pipe with surface hardening treatment and a seamless steel pipe, has high bending strength and fatigue resistance, and ensures the drilling stability.

[0046] The inner pipe 2 is arranged in the outer pipe assembly 1, and remains stationary during drilling, and is used for accommodating and protecting the core, avoiding the damage of the core caused by vibration, swing and friction force during drilling, and ensuring the integrity and purity of the core.

[0047] A reamer 3 is threadedly connected to the top of the inner tube 2, and the reamer 3 is used to enlarge the diameter of the drilled hole, improve the quality of the hole wall, and provide a fitting condition for the installation of the double-tube drill bit 5 in the subsequent process;

[0048] A buffer unit 4 is fixedly connected to the inner tube 2, and the buffer unit 4 is used to buffer the installation structure during drilling;

[0049] The double-tube drill bit 5 is threadedly connected to the top of the reamer 3, and the double-tube drill bit 5 is used to improve the rock core recovery rate, protect the integrity of the rock core, and adapt to the requirements of drilling in complex strata;

[0050] A double-tube drilling tool connecting assembly 6 is arranged at the bottom of the inner tube 2, and the second protective layer 12 is connected to the double-tube drilling tool connecting assembly 6.

[0051] The buffer unit 4 further comprises:

[0052] A connecting plate 42 is fixedly connected to the rubber pad 41;

[0053] A buffer spring 43 is fixedly connected between the connecting plates 42.

[0054] When the double-tube drill bit 5 is just drilled, a larger impact force will start the buffer unit, the rubber pad 41 in the inner tube 2 is extruded, the impact force is buffered and transmitted to the connecting plate 42, the connecting plate 42 compresses the buffer spring 43, and the buffer spring 43 further buffers the impact force 4, protects the internal components in the outer tube assembly 1, prevents the larger impact force from damaging the internal components, prolongs the service life, and saves the daily maintenance cost.

[0055] The basic principle and main features of the present application and the advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An installation structure for a drill bit of a rock and soil drilling rig, characterized in that, Include: The outer tube assembly (1) includes a first protective layer (11) and a second protective layer (12), the outer tube assembly (1) is used for protecting internal parts; The inner tube (2) is arranged in the outer tube assembly (1); The reamer (3) is threadedly connected to the top of the inner tube (2); The buffer unit (4) includes a rubber pad (41) fixedly connected in the inner tube (2), the buffer unit (4) facilitates buffering of the mounting structure during drilling; The double tube drill bit (5) is threadedly connected to the top of the reamer (3); The double tube drilling tool connecting assembly (6) is arranged at the bottom of the inner tube (2), and the second protective layer (12) is connected with the double tube drilling tool connecting assembly (6).

2. The mounting structure for a drill bit of a ground drill according to claim 1, wherein The buffer unit (4) further includes: The connecting plate (42) is fixedly connected to the rubber pad (41); The buffer spring (43) is fixedly connected between the connecting plates (42).

3. The mounting structure for a drill bit of a ground drill according to claim 1, wherein The outer tube assembly (1) is provided with a track body (112), the first protective layer (11) is fixedly connected with a track block (111), and the track block (111) is slidably connected in the track body (112).

4. The mounting structure for a drill bit of a ground drill according to claim 1, wherein The inner tube (2) is provided with a short circuit (31) at the upper end, and the reamer (3) abuts against the short circuit (31).

5. The mounting structure for a rock drill bit of a ground drill according to claim 4, wherein The short circuit (31) is provided with a clamping seat (32), and the clamping seat (32) is clamped with the double tube drill bit (5).

6. The mounting structure for a rock drill bit of a ground drill according to claim 1, wherein The first protective layer (11) adopts a surface hardening treated steel pipe as a material, and the second protective layer (12) adopts a seamless steel pipe as a material.

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