Net pressing type drilling structure

Abstract

The invention relates to a pressing net type drilling structure and relates to the field of lunar soil sampling. A sampling through hole is formed in a cutting drilling bit, a sample storage through hole is formed in a drilling pipe, one end of the cutting drilling bit is connected and communicated with one end of the drilling pipe, a pressing net is fixed in the sample storage through hole, and the pressing net has elastic force shrinking inwards in the radial direction of the pressing net. The cutting and drilling drill bit has the beneficial effects that the cutting and drilling drill bit is used for cutting lunar soil and drilling and sampling, the lunar soil enters the sampling through hole, and along with drilling, the lunar soil gradually enters the pressing net in the drill pipe. Specifically, in the beginning stage of drilling, the pressing net is in a contracted state, the pressing net is not attached to the inner wall of the drilling pipe, the drilling pipe is gradually filled with lunar soil in the drilling process, the pressing net is opened, and meanwhile the inner lunar soil is tightly pressed through the elastic force of the pressing net. The pressing net can lock the collected lunar soil at a fixed position, the pressing net type drilling structure can enable the lunar soil to be stably retained in the drilling and lifting processes, the lunar soil sequence in the pipe is guaranteed, and the sampling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of lunar soil sampling, and in particular to a pressure-net type drilling structure. Background Art

[0002] Because the lunar soil on the lunar surface has been eroded and disturbed by external factors such as cosmic rays for a long time, it carries less lunar information than the lunar soil deep inside the moon. Therefore, increasing the detection depth is of great significance for in-situ detection of the subsurface lunar soil. Drilling sampling is a common way to sample lunar soil.

[0003] In recent years, many countries have conducted more research and exploration on deep lunar sampling, such as the following lunar (planetary) drilling and sampling equipment: the Soviet Union's Luna16 and Luna20 series missions from 1970 to 1972; the U.S. Apollo15, Apollo16, and Apollo17 series missions from 1971 to 1972; the GZUdrill equipment carried on the sampler launched by the Soviet Union for Venus from 1978 to 1984; the CDS (Core Drill System) system developed by the United States in 1980; the Corer Tool and Surface Tool developed by the European Space Agency for comet sampling in 1995; the Dee Dri equipment developed by the Italian Space Agency in 2002; the Mini-Corer system designed by Honeybee for Mars drilling in 2003; and the prototype MRo developed by the European Space Agency for Mars drilling in 2005. SA2; in 2008, NASA developed the MAR-TE experimental system for Mars; in 2009, Beijing University of Aeronautics and Astronautics developed the MRDD sampling prototype; in 2014, Honeybee designed a double-layer tube sampling device for the MicroDrill device developed for the Mars 2020 program.

[0004] However, there are many challenges in the exploration and sampling of the deep lunar surface. For example, the working environment on the lunar surface is relatively harsh, the carrying capacity of the spacecraft is limited, the equipment power is required to be relatively small, the deep lunar environment is relatively complex and unknown, the lunar soil is likely to be disturbed, and the original stratigraphic information cannot be strictly guaranteed. The drilling efficiency and sampling efficiency cannot be guaranteed. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to preserve the original stratigraphic information of the lunar soil.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a press-mesh type drilling structure, comprising a cutting drilling bit, a drill pipe and a press-mesh, the cutting drilling bit having a sampling through hole, the drill pipe having a sample storage through hole, one end of the cutting drilling bit being connected and communicated with one end of the drill pipe, the press-mesh being fixed in the sample storage through hole, and the press-mesh having an elastic force to contract radially inward.

[0007] The beneficial effects of the present invention are as follows: the cutting drilling bit is used for cutting lunar soil and drilling for sampling, and the lunar soil enters the sampling through hole. As drilling proceeds, the lunar soil gradually enters the pressure net in the drill pipe. Specifically, at the beginning of drilling, the pressure net is in a contracted state, and the pressure net does not fit the inner wall of the drill pipe. During drilling, the lunar soil gradually fills the drill pipe, stretching the pressure net, and at the same time, the elastic force of the pressure net presses the internal lunar soil. The pressure net can lock the collected lunar soil in a fixed position. The pressure net drilling structure can keep the lunar soil stable during drilling and lifting, ensure the lunar soil sequence in the tube, and improve sampling efficiency.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the cutting drilling bit is threadedly connected to the drill pipe.

[0010] The beneficial effect of adopting the above further scheme is that the cutting drilling bit is threadedly connected to the drill pipe, which is easy to install and disassemble, and convenient to replace the cutting drilling bit or take out the lunar soil sample.

[0011] Furthermore, the diameter of the sample storage through hole is greater than the diameter of the sampling through hole.

[0012] The beneficial effect of adopting the above further solution is that the stepped hole formed between the sample storage hole and the sampling hole can effectively prevent the lunar soil from falling out of the sampling hole and lock the lunar soil in the drill pipe. In addition, the middle part of the drill pipe adopts a partially reduced thickness design, which can effectively reduce the mass of the drill pipe and reduce the load burden.

[0013] Furthermore, the outer wall of the drill pipe has a third spiral blade.

[0014] The beneficial effect of adopting the above-mentioned further scheme is: a third spiral blade is arranged on the outer wall of the drill pipe, so that the lunar soil can be transported in the direction away from the cutting drilling bit, avoiding the accumulation of lunar soil, and keeping the pressure of the lunar soil outside the drill pipe relaxed during the drilling process, thereby helping to discharge the soil from the drill pipe and ensuring the stability of the drilling process.

[0015] Furthermore, it also includes a pressure ring, wherein there are two pressure rings, and the two pressure rings are respectively fixedly connected to the two ends of the pressure net, and the two pressure rings are respectively connected to the two ends of the sample storage through hole.

[0016] The beneficial effect of adopting the above further solution is that the pressing net is fixed by the pressing ring, and the pressing net is easy to disassemble, so that the subsequent sample removal is convenient.

[0017] Furthermore, the pressure ring is provided with a plurality of fixing holes at intervals along the circumferential direction, and each of the fixing holes is riveted and fixed to the pressure mesh by a rivet.

[0018] Furthermore, the pressure ring has a positioning protrusion extending outward along its axial direction, and the inner wall of the sample storage hole has a mounting groove adapted to the shape of the pressure ring, and the pressure ring is clamped in the mounting groove.

[0019] The beneficial effect of adopting the above further scheme is: the pressure ring is provided with a positioning protrusion extending outward along its axial direction. After the pressure ring is clamped with the installation groove, the installation groove can limit the relative rotation of the pressure ring and the drill pipe in the circumferential direction, thereby ensuring the stable position of the lunar soil.

[0020] Furthermore, the pressure ring is a plate bent into an arc shape.

[0021] The beneficial effect of adopting the above further solution is that the C-shaped pressure ring has a deformation amount, which is convenient for installation in the drill pipe.

[0022] Furthermore, operation holes are provided at both ends of the pressure ring in the circumferential direction.

[0023] The beneficial effect of adopting the above further solution is that the operating hole is the operating hole of the circlip pliers, which is convenient for clamping and installing the compression ring.

[0024] Furthermore, the length of the drill pipe is 300mm-800mm, the outer diameter of the drill pipe is 10mm-50mm, and the material of the drill pipe is a light alloy material or a carbon fiber composite material.

[0025] The beneficial effect of adopting the above further solution is that the lightweight alloy material or carbon fiber composite material has the characteristics of light weight and high strength, and can effectively reduce the load burden. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the press mesh drilling structure of the present invention;

[0027] Figure 2 It is a front view of the press mesh drilling structure of the present invention;

[0028] Figure 3 A three-dimensional diagram of the drill pipe of the present invention;

[0029] Figure 4 A three-dimensional diagram of the pressure ring of the present invention;

[0030] Figure 5 A three-dimensional diagram of a cutting drilling drill bit of the present invention;

[0031] Figure 6 for Figure 5 A cross-sectional view of a cutting drilling bit;

[0032] Figure 7 A three-dimensional diagram of a cutting drilling drill bit without a tip cutting edge according to the present invention;

[0033] Figure 8 A three-dimensional diagram of a cutting drilling drill bit with an expanded cutting edge at the tip of the present invention;

[0034] Fig. 9 It is a three-dimensional diagram of a cutting drilling drill bit with an inward-retracted cutting edge at the tip of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 100, cutting drilling bit; 101, tip cutting edge; 102, first spiral blade; 103, second spiral blade; 104, drill bit connecting thread; 105, first spacing area; 106, second spacing area; 107, truncated cone section; 108, cylindrical section; 109, connecting section; 110, first through hole; 111, second through hole;

[0037] 200, drill pipe; 201, third spiral blade;

[0038] 300, press net;

[0039] 400, pressing ring; 401, fixing hole; 402, operating hole; 403, positioning protrusion. DETAILED DESCRIPTION

[0040] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0041] like Figure 1-Figure 9 As shown, this embodiment provides a pressing mesh type drilling structure, including a cutting drilling bit 100, a drill pipe 200 and a pressing mesh 300, the cutting drilling bit 100 has a sampling through hole, the drill pipe 200 has a sample storage through hole, one end of the cutting drilling bit 100 is connected and communicated with one end of the drill pipe 200, the pressing mesh 300 is fixed in the sample storage through hole, and the pressing mesh 300 has an elastic force to shrink inward along its radial direction.

[0042] The cutting drilling bit 100 is used for cutting lunar soil and drilling for sampling. The lunar soil enters the sampling through hole. As drilling proceeds, the lunar soil gradually enters the pressure net 300 in the drill pipe 200. Specifically, at the beginning of drilling, the pressure net 300 is in a contracted state, and the pressure net 300 does not fit the inner wall of the drill pipe 200. During the drilling process, the lunar soil gradually fills the drill pipe 200, stretching the pressure net 300. At the same time, the elastic force of the pressure net 300 presses the internal lunar soil. The pressure net 300 can lock the collected lunar soil in a fixed position. The pressure net drilling structure can keep the lunar soil stable during drilling and lifting, ensuring the lunar soil sequence in the tube and improving sampling efficiency.

[0043] Specifically, the pressing net 300 is a telescopically deformable braided expansion tube.

[0044] Specifically, one end of the cutting drilling bit 100 is fixedly connected or detachably connected to one end of the drill pipe 200 .

[0045] Based on any of the above solutions, the cutting drilling bit 100 is threadedly connected to the drill pipe 200 .

[0046] The cutting drilling bit 100 is threadedly connected to the drill pipe 200, which is convenient for installation and disassembly, and convenient for replacing the cutting drilling bit 100 or taking out lunar soil samples.

[0047] Specifically, the cutting drilling bit 100 has an external thread, and the drill pipe 200 has an internal thread. The cutting drilling bit 100 is inserted into the drill pipe 200 and threadedly connected thereto, and the process of lunar soil entering the drill pipe 200 is smooth.

[0048] Based on any of the above solutions, the diameter of the sample storage through hole is larger than the diameter of the sampling through hole.

[0049] The stepped hole formed between the sample storage hole and the sampling hole can effectively prevent the lunar soil from falling out of the sampling hole and lock the lunar soil in the drill pipe 200. In addition, the middle part of the drill pipe 200 adopts a partially reduced thickness design, which can effectively reduce the mass of the drill pipe 200 and reduce the load burden.

[0050] Based on any of the above solutions, the outer wall of the drill pipe 200 has a third spiral blade 201 .

[0051] A third spiral blade 201 is provided on the outer wall of the drill pipe 200 so that the lunar soil can be transported away from the cutting drilling bit 100 to avoid lunar soil accumulation and keep the lunar soil outside the drill pipe 200 in a relaxed state during the drilling process, thereby facilitating the discharge of soil from the drill pipe 200 and ensuring a stable drilling process.

[0052] Specifically, Figure 1As shown, the cross section of the third spiral blade 201 is rectangular, which can provide sufficient conveying force for the lunar soil. The outer diameter of the spiral blade on the cutting drilling drill 100 is larger than the outer diameter of the third spiral blade 201. The third spiral blade 201 and the spiral blade on the cutting drilling drill 100 are smoothly connected and transitioned, so that the lunar soil at the connection is in a loose state, and the drilling efficiency is high.

[0053] On the basis of any of the above schemes, it also includes a pressure ring 400, and there are two pressure rings 400. The two pressure rings 400 are respectively fixedly connected to the two ends of the pressure net 300, and the two pressure rings 400 are respectively connected to the two ends of the sample storage hole.

[0054] The pressing net 300 is fixed by a pressing ring 400, and the pressing net 300 is easy to disassemble, so that subsequent sample removal is convenient.

[0055] On the basis of any of the above solutions, the pressing ring 400 is provided with a plurality of fixing holes 401 spaced apart along the circumferential direction, and each of the fixing holes 401 is riveted and fixed to the pressing net 300 by a rivet.

[0056] On the basis of any of the above schemes, the pressure ring 400 has a positioning protrusion 403 extending outward along its axial direction, and the inner wall of the sample storage hole has a mounting groove adapted to the shape of the pressure ring 400, and the pressure ring 400 is snap-fitted into the mounting groove.

[0057] The pressure ring 400 is provided with a positioning protrusion 403 extending outward along its axial direction. Compared with the circular ring structure, after the pressure ring 400 of this scheme is engaged with the installation groove, the installation groove can limit the relative rotation of the pressure ring 400 and the drill pipe 200 in the circumferential direction, thereby ensuring the stability of the lunar soil position.

[0058] Based on any of the above solutions, the pressure ring 400 is a plate bent into an arc shape.

[0059] The C-shaped pressing ring 400 has a certain amount of deformation, so as to facilitate installation into the drill pipe 200 .

[0060] Based on any of the above solutions, operation holes 402 are provided at both ends of the pressure ring 400 in the circumferential direction.

[0061] The operating hole 402 is an operating hole for the circlip pliers, which is convenient for clamping and installing the compression ring 400.

[0062] Based on any of the above solutions, the length of the drill pipe 200 is 300 mm-800 mm, the outer diameter of the drill pipe 200 is 10 mm-50 mm, and the material of the drill pipe 200 is a light alloy material or a carbon fiber composite material.

[0063] Lightweight alloy materials or carbon fiber composite materials have the characteristics of light weight and high strength, and can effectively reduce the load burden.

[0064] Specifically, the lightweight alloy material includes aluminum alloy, titanium alloy, magnesium alloy or aluminum-based silicon carbide, etc.

[0065] For the cutting drilling drill bit 100, specifically, Figure 5-Figure 9 As shown, the cutting drilling bit 100 includes a first spiral blade 102, a second spiral blade 103 and a drill bit body, the drill bit body includes a truncated cone segment 107 and a cylindrical segment 108, one end of the truncated cone segment 107 is fixedly connected to one end of the cylindrical segment 108, the drill bit body has a sampling through hole, there are multiple first spiral blades 102, and the multiple first spiral blades 102 are fixedly arranged at intervals along the circumference of the truncated cone segment 107, there are multiple second spiral blades 103, and the multiple second spiral blades 103 are fixedly arranged at intervals along the circumference of the cylindrical segment 108, at least one of the first spiral blades 102 is disconnected from the second spiral blade 103 to form a first spacing area 105.

[0066] The truncated cone section 107 and the first spiral blade 102 on its outer side are mainly used for lunar soil cutting and drilling. The truncated cone structure can reduce drilling resistance. The cylindrical section 108 and the second spiral blade 103 on its outer side guide the lunar soil during the drilling process. The lunar soil and lunar rock can be promptly transmitted upward along the blade path in a spiral after being crushed, which reduces the possibility of the drilling system being blocked and alleviates the torque requirement of the drilling system. In addition, multiple first spiral blades 102 and second spiral blades 103 are provided to form a multi-layer cutting edge structure to ensure that all cutting edges wear evenly and improve drilling efficiency. During the drilling process, the lunar soil sample enters the sampling through hole and enters the subsequent drill pipe for storage.

[0067] The first spiral blade 102 and the second spiral blade 103 are disconnected to form a first spacing area 105. The vacant first spacing area 105 can reduce the lunar soil pressure there, making the compact lunar soil sparse, preventing the accumulation of lunar soil from causing the drill bit to be blocked, and is conducive to lifting the drill after the drilling process is completed. The cutting drilling drill bit of the present invention has low drilling resistance and has the effect of loosening the lunar soil, which is conducive to the heat dissipation of the drill bit, and can drill to a predetermined depth, avoiding drill bit failure due to geological and environmental reasons.

[0068] Specifically, the frustum section 107 is in the shape of a frustum, and the diameter of one end thereof is greater than the diameter of the other end thereof, and the diameter of one end of the frustum section 107 is equal to the diameter of the cylindrical section 108 .

[0069] Specifically, the number of the first spiral blades 102 and the number of the second spiral blades 103 are equal or unequal. All the first spiral blades 102 and the second spiral blades 103 are not connected, or some of the first spiral blades 102 and the second spiral blades 103 are disconnected.

[0070] Specifically, the first spiral blade 102 and the second spiral blade 103 are both blades with a rectangular cross section.

[0071] Based on any of the above solutions, the middle or end of at least one of the second spiral blades 103 is disconnected to form a second spacing area 106 .

[0072] The middle or end of the second spiral blade 103 is disconnected to form a second spacing area 106 to reduce the lunar soil pressure there, making the compact lunar soil sparse, preventing the drill bit from being blocked due to lunar soil accumulation, and facilitating the lifting of the drill after the drilling process is completed.

[0073] Based on any of the above solutions, the helical angle of the first helical blade 102 is smaller than the helical angle of the second helical blade 103 .

[0074] The first spiral blade 102 has a small spiral angle, which can reduce drilling resistance. The second spiral blade 103 has a slightly larger spiral angle, which can increase the bearing capacity during the lunar soil transportation process.

[0075] Specifically, the helix angle refers to the angle between the tangent of the helix of the blade and the axis of the drill body.

[0076] Based on any of the above solutions, the end of the first spiral blade 102 facing the other end of the truncated cone segment 107 has a first spiral cutting edge.

[0077] A first spiral cutting edge is provided at the end of the first spiral blade 102 to reduce the drilling resistance of the first spiral blade 102 and improve the lunar soil drilling efficiency.

[0078] The first spiral cutting edge refers to a wedge-shaped structure similar to a blade formed by gradually decreasing thickness at the end of the first spiral blade 102 .

[0079] On the basis of any of the above schemes, it further includes a tip cutting edge 101, which is annular and has an annular cutting edge, and the tip cutting edge 101 is fixedly connected to the other end of the truncated cone segment 107.

[0080] An annular tip cutting edge 101 is provided at the end of the truncated cone section 107, which can effectively improve the cutting ability of the drill bit and facilitate lunar soil sampling.

[0081] Optional, such as Figure 7 As shown, the other end of the truncated cone section 107 is a plane and is not provided with a tip cutting edge 101; or Figure 5 As shown, the tip cutting edge 101 is cylindrical; or Figure 8 As shown in FIG. 1 , the tip cutting edge 101 expands outward, that is, the inner diameter of the tip cutting edge 101 gradually increases in a direction away from the truncated cone section 107; or as shown in FIG. Fig. 9As shown, the tip cutting edge 101 is retracted, that is, the inner diameter of the tip cutting edge 101 gradually decreases in the direction away from the frustum section 107 .

[0082] Based on any of the above solutions, the inner and outer diameter-guarding materials of the first spiral blade 102 and the second spiral blade 103 are cemented carbide material or diamond; the material of the tip cutting edge 101 is cemented carbide material or diamond.

[0083] The use of cemented carbide material or diamond can reduce the wear of the cutting edges (the first spiral blade 102, the second spiral blade 103 and the tip cutting edge 101), improve drilling efficiency, reduce the possibility of drill bit failure due to temperature changes, and thus increase the service life of the drill bit.

[0084] Specifically, the first spiral blade 102, the second spiral blade 103 and the tip cutting edge 101 are welded to the drill body to ensure a high-strength connection between the cutting edges and the diameter-protecting material, thereby improving the drilling efficiency of the drill during the drilling process.

[0085] The diameter-maintaining material is a material fixed to the surface of the first spiral blade 102 and the second spiral blade 103 , or is a part of the material of the first spiral blade 102 and the second spiral blade 103 .

[0086] Among them, the cemented carbide material is an alloy material containing the following components: tungsten carbide, titanium carbide, tantalum carbide and cobalt.

[0087] Based on any of the above schemes, the drill bit body also includes a connecting section 109, one end of which is fixedly connected to the other end of the cylindrical section 108, the outer diameter of the connecting section 109 is smaller than the outer diameter of the cylindrical section 108, and the sampling through hole passes through the connecting section 109.

[0088] The connecting section 109 is used to connect with the drill pipe. The connecting section 109 has a reduced diameter and can be effectively connected with the drill pipe to reduce the lunar soil pressure.

[0089] Specifically, the connecting section 109 and the cylindrical section 108 are transitioned through a rounded corner or a chamfered corner.

[0090] On the basis of any of the above solutions, it further includes a drill bit connecting thread 104 , wherein there are multiple drill bit connecting threads 104 , and the multiple drill bit connecting threads 104 are fixedly arranged at intervals along the circumference of the connecting section 109 .

[0091] The drill bit body is connected to the drill pipe via the drill bit connecting thread 104, and the connection is convenient and quick.

[0092] Specifically, the outer diameter of the drill bit connecting thread 104 is smaller than the diameter of the cylindrical section 108 .

[0093] Based on any of the above schemes, the sampling through hole includes a first through hole 110 and a second through hole 111 which are connected in sequence, the diameter of the first through hole 110 is smaller than the diameter of the second through hole 111 , and the first through hole 110 is arranged toward the other end of the frustum segment 107 .

[0094] The sampling hole adopts a stepped inner hole design. When the drilling system completes the operation and is lifted, the collected columnar lunar soil is close to the diameter of the first through hole 110. The lunar soil is usually in an inclined or skewed state in the second through hole 111 with a larger diameter, and will not be coaxial with the first through hole 110, thereby effectively guiding and locking the lunar soil in the tube and reducing the possibility of the lunar soil falling off from the first through hole 110.

[0095] Specifically, the diameter of the sample storage through hole is greater than the diameter of the second through hole 111 .

[0096] Based on any of the above solutions, the material of the drill bit body is a lightweight alloy material or a carbon fiber composite material.

[0097] Lightweight alloy materials or carbon fiber composite materials have the advantages of light weight and high strength, and can effectively reduce the load mass.

[0098] Among them, the lightweight alloy material is one or more combinations of the following materials: aluminum alloy, titanium alloy, magnesium alloy, aluminum-based silicon carbide, etc.

[0099] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0101] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0102] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A press mesh drilling structure, characterized in that: The invention comprises a cutting drilling bit (100), a drill pipe (200) and a pressing net (300), wherein the cutting drilling bit (100) has a sampling through hole, the drill pipe (200) has a sample storage through hole, one end of the cutting drilling bit (100) is connected and communicated with one end of the drill pipe (200), the pressing net (300) is fixed in the sample storage through hole, and the pressing net (300) has an elastic force to contract inwardly along its radial direction.

2. A press mesh drilling structure according to claim 1, characterized in that: The cutting drilling bit (100) is threadedly connected to the drill pipe (200).

3. A press mesh drilling structure according to claim 1, characterized in that: The diameter of the sample storage through hole is greater than the diameter of the sampling through hole.

4. A press mesh drilling structure according to claim 1, characterized in that: The outer wall of the drill pipe (200) is provided with a third spiral blade (201).

5. A press mesh drilling structure according to claim 1, characterized in that: It also includes a pressure ring (400), wherein there are two pressure rings (400), and the two pressure rings (400) are respectively fixedly connected to the two ends of the pressure net (300), and the two pressure rings (400) are respectively connected to the two ends of the sample storage through hole.

6. A press mesh drilling structure according to claim 5, characterized in that: The pressure ring (400) is provided with a plurality of fixing holes (401) spaced apart along the circumferential direction, and each of the fixing holes (401) is riveted and fixed to the pressure net (300) via a rivet.

7. A press mesh drilling structure according to claim 5, characterized in that: The pressure ring (400) has a positioning protrusion (403) extending outward along its axial direction, and the inner wall of the sample storage hole has a mounting groove that is compatible with the shape of the pressure ring (400), and the pressure ring (400) is snap-fitted into the mounting groove.

8. A press mesh drilling structure according to claim 5, characterized in that: The pressure ring (400) is a plate bent into an arc shape.

9. A press mesh drilling structure according to claim 8, characterized in that: Both ends of the pressure ring (400) in the circumferential direction are provided with operation holes (402).

10. A press mesh drilling structure according to any one of claims 1 to 9, characterized in that: The length of the drill pipe (200) is 300 mm-800 mm, the outer diameter of the drill pipe (200) is 10 mm-50 mm, and the material of the drill pipe (200) is a light alloy material or a carbon fiber composite material.

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