A dust-proof sampling device and method for geological and mineral exploration

Abstract

The present invention discloses a dust-proof sampling device and method for geological and mineral exploration, specifically relating to the field of geological exploration technology. The device includes a drilling assembly, a drill pipe assembly, a sampling inner tube and an extraction rod. The drilling assembly includes a drilling rig and a feed drive frame. The drill pipe assembly includes a primary drill pipe section and multiple secondary drill pipe sections. The sampling inner tube is arranged inside the primary drill pipe. The bottom end of the sampling inner tube is provided with multiple groups of elastic strips. The bottom outer side of the sampling inner tube is also provided with a tightening controller. When the sampling inner tube is pulled up, the present invention squeezes the bottom end area of ​​the elastic strips through the tightening controller, causing all the elastic strips to bend inwardly, thereby forming a certain degree of squeezing on the soil sample entering the sampling inner tube, improving the carrying capacity of the soil sample, and thus ensuring that the sampling inner tube can effectively bring out the soil sample inside it when it rises, greatly improving the integrity and accuracy of the sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration, and more particularly to a dust-proof sampling device and method for geological and mineral exploration. Background Art

[0002] Mineral exploration is the process of finding and evaluating mineral resources through a series of geological surveys, geophysical and geochemical explorations, and remote sensing technologies. This work is of great significance for discovering new mineral resources, assessing their economic value, and planning mine development.

[0003] Soil sampling in geological and mineral exploration is a crucial step in assessing the quality and scale of mineral deposits. Systematically collecting and analyzing samples reveals key information such as the geological composition of a mining area, the distribution of ore bodies, and the mineral composition and grade. Samples typically undergo pre-processing steps such as crushing, mixing, and fractionation. Various analytical techniques are then used to determine the content of target elements or compounds, providing sufficient exploration information for mineral development.

[0004] Among them, in order to obtain more accurate soil information, it is necessary to set up multiple sampling points in the selected area, and use drilling equipment to drill soil and take samples at the sampling points. Specifically, when sampling, use a drill rig to drill the drill pipe into the ground, the drill bit breaks the rock and soil, and the soil sample enters the drill pipe. Then the drill pipe is removed and the soil sample in the pipe is taken out. For scenarios with a larger sampling depth, multiple sections of drill pipe are required. Each time a section of drill pipe is drilled, the drill rig is separated from the drill pipe, and a new section of drill pipe is added before drilling continues until the predetermined depth is reached.

[0005] However, in the above scheme, since the drill pipe is finally drilled deeper, more samples are retained inside, and the overall weight is relatively large, the internal samples are easy to slip when the drill pipe is taken out. If a batch sampling method is adopted, that is, the drill pipe is taken out for sampling every time a section of the drill pipe is drilled, then the direct removal of the drill pipe may easily cause the upper layer of soil or rock in the borehole to collapse, affecting subsequent sampling. Therefore, the existing technology adopts an inner and outer double tube method for drilling sampling.

[0006] For example, a double-tube drilling tool system is used, with the outer layer being the drill pipe (steel) and the inner layer being the sampling tube (i.e., the inner tube, usually made of PVC). During sampling operations, the double-tube drilling tool is used to start drilling operations, and drilling is stopped when the predetermined depth is reached. During the drilling process, soil enters the inner tube and remains. During actual drilling, each time the drilling reaches a certain depth, the drill pipe can be opened from the ground, and then the extraction rod is inserted into the drill pipe that has been drilled into the ground. With the help of a snap mechanism, the extraction rod is engaged with the inner tube at the bottom, and the inner tube can be pulled up, and then the sample can be directly stored as a storage container with the help of the inner tube. Each time a certain depth is drilled, a sample can be taken once in the above manner, and then during the sampling process, the integrity of the soil sample can be guaranteed as much as possible, and with the support of the drill pipe in the soil, the borehole collapse can be avoided to affect the sampling. When the sampling is completed, the drill pipe underground can be removed at one time using hydraulic equipment.

[0007] However, in the actual detection process, if complex geological structures are encountered, for example, during the drilling process, some strata contain soft rock layers (or coal seams, soil layers), crushed stone layers, gravel layers, and other geological conditions that are not as compact as mud layers and rock layers. After such soil enters the inner tube, it is relatively soft (or loose) and difficult to form close contact with the inner tube. During actual extraction, it is easy for the sample to break in the middle and fall off, or the sample as a whole detaches from the inner tube and remains underground and cannot be taken out, thereby affecting the integrity and accuracy of the sampling. In addition, the residual sample will hinder the subsequent placement of the inner tube, affecting the sampling efficiency. Summary of the Invention

[0008] The present invention provides a dust-proof sampling device and method for geological and mineral exploration, and aims to solve the following problem: in the prior art, when encountering relatively soft soil or other soil that is difficult to form close contact with the inner tube, it is easy for the sample to break in the middle and fall off, or the sample as a whole detaches from the inner tube and remains underground and cannot be taken out, thereby affecting the integrity and accuracy of the sampling. In addition, the residual sample will also hinder the subsequent insertion of the inner tube, affecting the sampling efficiency.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solutions: a dust-proof sampling device for geological and mineral exploration, comprising a drilling assembly, a drill pipe assembly, a sampling inner tube and an extraction rod, wherein the drilling assembly comprises a drilling rig and a feed drive frame;

[0010] The drill pipe assembly includes a primary drill pipe and multiple secondary drill pipes. The sampling inner pipe is arranged inside the primary drill pipe. A sealing cap is installed at the top of the sampling inner pipe. A locking assembly is provided between the sealing cap and the primary drill pipe. The bottom end of the sampling inner pipe is provided with multiple groups of elastic strips. The bottom of the inner cavity of the primary drill pipe is provided with an inner boss that contacts and cooperates with the bottom end of the elastic strip.

[0011] A tightening controller is also provided on the outer side of the bottom of the sampling inner tube, and the tightening controller is used to make the elastic pressure strip bend inwardly;

[0012] A locking sleeve is fixedly installed on the bottom end of the extraction rod, and an unlocking structure and a locking structure are provided in the locking sleeve.

[0013] In a preferred embodiment, the locking assembly is a locking rod, which is laterally slidably installed in the sealing cover, and an elastic member is provided between the locking rod and the sealing cover, which is used to provide an elastic force for the locking rod to move outward, and a locking groove that is mutually engaged with the locking rod is provided in the primary drill pipe, and the locking sleeve is a cylindrical structure, and the unlocking structure and the locking structure inside the locking sleeve are inward buckling steps, which are convex ring structures formed inside the locking sleeve, and a wedge-shaped buckle is fixedly connected to the locking rod, and the bottom port of the locking sleeve is set as a conical mouth, and the top of the wedge-shaped buckle is set as an inclined structure that slides and fits with the conical mouth at the bottom of the locking sleeve.

[0014] In a preferred embodiment, the tightening controller is a tightening rope, and the outside of the bottom end of the elastic strip is fixedly connected to a ring. The two ends of the tightening rope are passed through all the rings around the sampling inner tube and then led upward and fixedly connected to the sealing cover. The top end of the sampling inner tube is slidably inserted into the sealing cover, and a limiting groove is provided on the top side wall of the sampling inner tube. A limiting rod is fixedly installed in the sealing cover, and the limiting rod is slidably adapted to the limiting groove.

[0015] In a preferred embodiment, the tightening controller is an inner conical sleeve, the inner cavity of the inner conical sleeve is a conical cavity, the inner conical sleeve is sleeved on the outside of the bottom end of the sampling inner tube, the outer wall of the bottom end of the elastic strip is fixedly connected with a protrusion, the protrusion is slidably adapted to the conical surface of the inner conical cavity of the inner conical sleeve, the outer wall of the sampling inner tube is provided with a pressure block corresponding to the position of the top of the inner conical sleeve, the top of the sampling inner tube is fixedly connected to the sealing cover, and a damping structure is provided on the inner conical sleeve.

[0016] In a preferred embodiment, the sampling inner tube is a thin-walled elastic part, an injection channel is provided in the locking sleeve, the injection channel is connected to the high-pressure water injection pump through a pipeline, a guide flow channel corresponding to the injection channel is provided in the sealing cover, and a liquid outlet groove is provided on the side wall of the sealing cover, and the guide flow channel is connected to the liquid outlet groove.

[0017] In a preferred embodiment, the damping member on the inner cone sleeve is a sealing member, which is fixedly mounted on the top end of the inner cone sleeve, and a V-shaped groove structure is provided on the top of the sealing member.

[0018] In a preferred embodiment, a drill head is provided at the bottom of the primary drill pipe, and threaded docking structures are provided between the primary drill pipe and the secondary drill pipe, between adjacent secondary drill pipes, between the primary drill pipe and the output shaft of the drilling rig, and between the secondary drill pipe and the output shaft of the drilling rig.

[0019] In a preferred embodiment, the sampling device also includes a walking drive assembly, which includes a walking mechanism and a manipulator arm. The walking mechanism is used to drive the drilling assembly to walk, and the manipulator arm is used to drive the feed drive frame to produce free movements such as swinging and lifting to adapt to the ground environment of the actual sampling point. The feed drive frame is installed on the manipulator arm, and the drill rig is slidably set on the feed drive frame, and the feed drive frame is provided with a mobile drive device for driving the drill rig to move.

[0020] In a preferred embodiment, the sampling device also includes an anti-dust component, which includes a protective cover, which is installed at the bottom end of the feed drive frame. A double-conical pressure ring is fixedly installed inside the protective cover, and the top and bottom of the double-conical pressure ring are both set to conical surfaces. The protective cover and the double-conical pressure ring are both provided with guide holes for accommodating the primary drill pipe and the secondary drill pipe to pass through. An atomizing nozzle is provided at the top of the inner cavity of the protective cover, and the atomizing nozzle is connected to the water pump structure through a pipe.

[0021] A dust-proof sampling method for geological and mineral exploration comprises the following steps:

[0022] Step 1: Operate the travel drive assembly to drive the feed drive frame to the sampling area, and adjust the angle of the feed drive frame to make it vertical;

[0023] Step 2: dock the primary drill pipe equipped with the sampling inner tube with the output shaft of the drilling rig, and drive the drilling rig to start descending, so that the drilling rig drives the primary drill pipe to start drilling;

[0024] Step 3: After the primary drill pipe is drilled in, the drill rig is stopped and driven away from the sampling area. The extraction rod is inserted into the primary drill pipe, the locking sleeve is docked with the blocking cover, the blocking cover is unlocked, and the extraction rod is pulled up to pull out the sampling inner tube to obtain a soil sample;

[0025] Step 4: Install a new set of sampling inner tubes into the primary drill pipe, and connect a section of secondary drill pipe to the top of the primary drill pipe. Connect the secondary drill pipe to the output shaft of the drilling rig, and drive the drilling rig to start lowering again, so that the drilling rig drives the primary drill pipe to continue drilling;

[0026] Step 5: After the secondary drill pipe is drilled in, repeat step 3 above;

[0027] Step 6: Install a new set of sampling inner tubes into the primary drill pipe, and connect a new secondary drill pipe to the top of the original secondary drill pipe. Connect the secondary drill pipe to the output shaft of the drilling rig, and drive the drilling rig to start descending again, so that the drilling rig drives the primary drill pipe to continue drilling;

[0028] Step 7: Repeat steps 5 and 6 above until all soil samples within the required sampling depth are collected.

[0029] The beneficial effect of the present invention is that: when the sampling inner tube is pulled up, the present invention squeezes the bottom end area of ​​the elastic strip through the tightening controller, causing all the elastic strips to bend inward, thereby forming a certain squeezing effect on the soil sample entering the sampling inner tube, improving the carrying capacity of the soil sample, and thus ensuring that the sampling inner tube can effectively bring out the soil sample inside it when it rises, effectively avoiding the situation where part or all of the soil sample falls off and cannot be brought out when the sampling inner tube is extracted, greatly improving the integrity and accuracy of the sampling, reducing the occurrence of sampling errors, and thus improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the drilling process of the present invention.

[0032] Figure 3 This is a state diagram of the present invention when extracting the sampling inner tube.

[0033] Figure 4 For the present invention Figure 3 A magnified view of the structure of part A.

[0034] Figure 5 This is a schematic diagram of the bottom structure of the sampling inner tube when the tightening rope solution is adopted in the present invention.

[0035] Figure 6 This is a schematic structural diagram of the sampling inner tube based on the tightening rope solution of the present invention.

[0036] Figure 7 For the present invention Figure 6 Enlarged view of the structure of part B.

[0037] Figure 8 This is a schematic diagram of the bottom structure of the sampling inner tube when the inner cone sleeve solution is adopted in the present invention.

[0038] Figure 9 This is a schematic structural diagram of the sampling inner tube based on the inner cone sleeve solution of the present invention.

[0039] Figure 10 This is a state diagram of the sampling inner tube of the present invention when it starts to rise and cooperates with the inner cone sleeve to thereby generate internal pressure on the elastic layering strip.

[0040] Figure 11 This is a schematic diagram of the structure when the present invention adds an in-pipe cleaning component.

[0041] Figure 12 This is a state diagram when water is input into the gap between the sampling inner tube and the drill pipe according to the present invention.

[0042] Figure 13 For the present invention Figure 11 Enlarged view of the C part structure.

[0043] Figure 14 Schematic diagram of the internal structure of the protective cover of the present invention.

[0044] Figure 15 Flow chart of the sampling method of the present invention.

[0045] The accompanying drawings are marked as follows: 1. Drilling assembly; 11. Drilling rig; 12. Feed drive frame; 2. Drill pipe assembly; 21. Primary drill pipe; 211. Locking groove; 22. Secondary drill pipe; 23. Drill head; 3. Travel drive assembly; 31. Travel mechanism; 32. Manipulator arm; 4. Dust prevention assembly; 41. Protective cover; 42. Double-conical pressure ring; 43. Atomizing nozzle; 5. Sampling inner tube; 51. Blocking cover; 511. Locking Rod; 512, wedge-shaped buckle; 513, positioning column; 514, guide flow channel; 515, liquid outlet groove; 52, elastic pressure strip; 53, through ring; 54, guide ring; 55, limit groove; 56, limit rod; 57, raised part; 58, pressure block; 6, tightening controller; 61, tightening rope; 62, inner cone sleeve; 621, sealing element; 7, extraction rod; 71, locking sleeve; 72, inner buckle convex step; 73, injection channel. DETAILED DESCRIPTION

[0046] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0047] Refer to the instruction manual Figures 1 to 14 A dust-proof sampling device for geological and mineral exploration includes a drilling assembly 1, a drill pipe assembly 2, a walking drive assembly 3, an anti-dust assembly 4 and a sampling inner tube 5. The drilling assembly 1 includes a drilling rig 11 and a feed drive frame 12. The walking drive assembly 3 includes a walking machine 31 and a manipulating arm 32. The walking machine 31 is used to drive the drilling assembly 1 to move. The manipulating arm 32 is used to drive the feed drive frame 12 to swing, lift and other free movements to adapt to the ground environment of the actual sampling point. The feed drive frame 12 is installed on the manipulating arm 32. The drilling rig 11 is slidably set on the feed drive frame 12, and the feed drive frame 12 is provided with a mobile drive device for driving the drilling rig 11 to move along the length direction of the feed drive frame 12 (mainly vertical up and down movement during specific use).

[0048] By adopting the above solution, the sampling device can be moved and operated more conveniently, so as to quickly perform sampling at multiple sampling points, and can reduce the construction of the on-site drilling component 1, improve sampling efficiency, and reduce the workload of staff.

[0049] The drill pipe assembly 2 includes a primary drill pipe 21 and multiple secondary drill pipes 22. The primary drill pipe 21 and the secondary drill pipe 22 have basically the same structure. The inner and outer wall diameters of the primary drill pipe 21 are the same as those of the secondary drill pipe 22. The difference is that a drill head 23 is provided at the bottom of the primary drill pipe 21, and a threaded docking structure is provided between the primary drill pipe 21 and the secondary drill pipe 22, between adjacent secondary drill pipes 22 and secondary drill pipes 22, between the primary drill pipe 21 and the output shaft of the drill rig 11, and between the secondary drill pipe 22 and the output shaft of the drill rig 11. The threaded docking structure can realize any assembly of the above structure. During actual drilling, each time a secondary drill pipe 22 is drilled, the upper secondary drill pipe 22 can be undocked from the output end of the drill rig 11 by reverse rotation, and then another secondary drill pipe 22 is installed. The added secondary drill pipe 22 is then docked with the secondary drill pipe 22 below and the output shaft of the drill rig 11 above, and drilling is continued. Therefore, according to the actual sampling depth, a corresponding number of secondary drill pipes 22 are selected and the above operations are performed in sequence, so that continuous drilling and sampling can be carried out.

[0050] Among them, the sampling inner tube 5 is arranged inside the primary drill pipe 21, and a sealing cover 51 is installed on the top of the sampling inner tube 5. A locking assembly is provided between the sealing cover 51 and the primary drill pipe 21. When the sampling inner tube 5 is completely loaded into the primary drill pipe 21, the locking assembly is locked with the primary drill pipe 21, so that the sampling inner tube 5 is fixed in the primary drill pipe 21. A plurality of groups of elastic strips 52 are provided at the bottom end of the sampling inner tube 5, and a gap is provided between two adjacent elastic strips 52. The sealing cover 51 and the elastic strip 52 can be an integrated structure, for example, using PV The sampling inner tube 5 is made of transparent plastic such as C or a thin-walled metal structure, and multiple slits are cut at the bottom end of the sampling inner tube 5 to form multiple elastic strips 52. The bottom of the inner cavity of the primary drill pipe 21 is provided with an inner boss for receiving and supporting the elastic strips 52, and the inner diameter of the inner boss is the same as the inner diameter of the sampling inner tube 5, so as to cooperate with the locking assembly to form a stable fixation for the sampling inner tube 5, and then during the drilling process, as the primary drill pipe 21 is continuously fed, the soil at the sampling point can gradually enter the interior of the sampling inner tube 5.

[0051] It should be noted that for sampling areas without hard rocks (such as granite), the drilling rig 11 can mainly use an impact-type downward pressure drilling rig. When controlling the feed of the drill pipe assembly 2, the drill pipe assembly 2 is mainly pressed into the soil by the impact force. At this time, the bottom end of the inner cavity of the primary drill pipe 21 can be set to a conical inner cavity, so that during the downward pressure process, the soil sample can be squeezed to a certain extent and then enter the sampling inner tube 5. In addition, rotary drilling can also be used. At this time, the drill head 23 needs to select a drilling structure with a diamond drill bit at the bottom, and the upper The conical inner cavity at the bottom end of the inner cavity of the primary drill pipe 21 can be retained. When facing a situation with hard rock formations (a variety of primary drill pipes 21 can be equipped during actual drilling. During actual drilling, when the approximate soil conditions are judged according to the difficulty of drilling, the corresponding primary drill pipe 21 is replaced), a drilling structure with a diamond drill bit is mainly used. At this time, it should be noted that the inner diameter of the drill bit width rotation cutting range at the bottom of the drill head 23 should be basically the same as the inner diameter of the sampling inner tube 5 to avoid the diameter of the columnar sample formed by cutting being too large and unable to enter the sampling inner tube 5.

[0052] In addition, a tightening controller 6 is provided on the outer side of the bottom of the sampling inner tube 5. The tightening controller 6 is used to squeeze the bottom end area of ​​each elastic strip 52 and cause the bottom end area of ​​the elastic strip 52 to bend inward when a single drilling is completed and sampling is required (that is, when the sampling inner tube 5 starts to rise).

[0053] The extraction rod 7 can be an integrated rod or a multi-section rod structure threadedly spliced ​​to adapt to different sampling depths. The bottom end of the extraction rod 7 is fixedly installed with a locking sleeve 71, and the locking sleeve 71 is provided with an unlocking structure for unlocking the locking structure on the sealing cover 51, and the locking sleeve 71 is also provided with a locking structure for forming a locking engagement with the sealing cover 51. Then, when drilling to the corresponding depth in a single time (starting from the depth of the primary drill pipe 21, and then each time a secondary drill pipe 22 is added, it is to continue drilling to the depth of a secondary drill pipe 22), the output end of the drilling rig 11 is released from the docking with the secondary drill pipe 22 (or the initial primary drill pipe 21), and the drilling rig 11 is driven to rise to the highest point, or the walking machine 31 is directly driven to move to the rear position to prevent the drilling rig 11 from affecting the work of the extraction rod 7, and then the extraction rod 7 is extended down into the primary drill pipe 21. Figure 3, so that the locking sleeve 71 is docked with the blocking cover 51. After the locking between the blocking cover 51 and the primary drill pipe 21 is contacted, the extraction rod 7 is pulled up, and the sampling inner tube 5 can be lifted up by means of the buckling of the locking sleeve 71 and the blocking cover 51. At the same time, the tightening controller 6 squeezes the bottom end area of ​​the elastic layer 52, causing all the elastic layer 52 to bend inwardly, thereby forming a certain squeezing effect on the soil sample entering the sampling inner tube 5 (for soft soil, the internal pressure of each elastic layer 52 is greater than that of the elastic layer 52). The bottom of the soil sample can be relatively compressed, thereby making the soil more compact, so that it can be more effectively retained in the sampling inner tube 5. For hard rock formations, the inward squeezing of each elastic layer 52 can increase the friction with the rock column-shaped soil sample. However, it should be noted that when encountering hard rock formations, the drill pipe assembly 2 must be shaken before sampling, or the bottom hard rock formation and the rock column formed by drilling must be broken when using the corresponding settings to separate them), thereby ensuring that the sampling is carried out properly. When the sampling inner tube 5 rises, it can effectively bring out the soil sample inside it, thereby effectively avoiding the situation where part or all of the soil sample falls off and cannot be brought out when the sampling inner tube 5 is extracted, which greatly improves the integrity and accuracy of the sampling, reduces the occurrence of sampling errors, and thus improves the sampling efficiency. Each time the sampling inner tube 5 is extracted, a new set of sampling inner tubes 5 can be re-installed into the primary drill pipe 21, so that the new sampling inner tube 5 is engaged and fixed with the primary drill pipe 21, and then a section of secondary drill pipe 22 is installed, and the secondary drill pipe 22 is connected to the drilling rig 11, and drilling is continued. This cycle is repeated. Each time a section of secondary drill pipe 22 is drilled, a sampling inner tube 5 is extracted until the sampling of the final depth is completed, and the extracted sampling inner tubes 5 are marked and stored in sequence. The soil samples can be marked and stored according to the soil depth, which is conducive to the identification of the soil sample and is more conducive to the detection of the soil at different depths, thereby obtaining more detailed detection information.

[0054] It should be noted that the mobile drive device on the feed drive frame 12 can adopt a hydraulic cylinder, a motor screw, and a commonly used wheel cable structure, etc., and the drilling rig 11 is used to drive the drill pipe assembly 2 for drilling, and the drilling rig 11 can adopt an impact drive or a rotary drive according to actual conditions. As for the travel drive assembly 3, the travel machinery 31 can adopt various small mobile vehicles, such as wheeled vehicles and crawler vehicles, and be equipped with commonly used control arms (such as a series of control structures such as rotation and swinging, which can be specifically referred to the control structure of engineering equipment such as excavators). According to actual usage, on-site personnel manually operate the travel drive assembly 3 to move or control the drilling assembly 1 to generate corresponding movement so that the drill pipe assembly 2 reaches and aligns with the sampling point. Since the drilling assembly 1 used in this embodiment can directly adopt commonly used drilling equipment on the market, and the travel drive assembly 3 can also adopt commonly used corresponding mobile carts and mechanical arm structures (for example, a small excavator is used to improve it and the bucket is replaced with the drilling assembly 1 of this embodiment), its detailed structure and working principle will not be explained in detail in this embodiment.

[0055] Refer to the instruction manual Figures 5 to 7 The present embodiment provides a scheme for a tightening controller 6. Specifically, the tightening controller 6 is a tightening rope 61. The outer end of the bottom end of the elastic pressure strip 52 is fixedly connected to a through-ring 53. The two ends of the tightening rope 61 surround the sampling inner tube 5 and pass through all the through-rings 53 and then lead out upward and are fixedly connected to the blocking cover 51. In this scheme, the top end of the sampling inner tube 5 is slidably inserted into the blocking cover 51. A limiting groove 55 is provided on the top side wall of the sampling inner tube 5. A limiting rod 56 is fixedly installed in the blocking cover 51. The limiting rod 56 is slidably adapted to the limiting groove 55, thereby forming a restriction on the sliding area of ​​the sampling inner tube 5. Among them, the tightening rope 61 can also be provided in multiple groups, and corresponding guide rings 54 are provided on the outer wall of the sampling inner tube 5, so that the tightening rope 61 passes through the guide ring 54 upward and is then connected to the blocking cover 51, and then the vertical part of the tightening rope 61 is guided by the guide ring 54.

[0056] In actual use, when the sampling inner tube 5 is installed in the primary drill pipe 21, the bottom of the sampling inner tube 5 is restricted by the inner boss and locked by the upper locking assembly, so that the sampling inner tube 5 is fully inserted into the blocking cover 51. At this time, the tightening rope 61 is in a relaxed state, and the elastic strip 52 is in an undeformed state, so that it can adapt to the drilling of the primary drill pipe 21 and allow the soil sample to enter the sampling inner tube 5 smoothly. When the sampling inner tube 5 needs to be extracted, the extraction rod 7 first lifts the blocking cover 51 upward. Under the influence of the gravity of the sampling inner tube 5 itself and the soil sample inside the sampling inner tube 5, the tightening rope 61 can form a tightening and squeezing on the bottom of the elastic strip 52, and then all the elastic strips 52 are deformed inward synchronously, squeezing the soil sample.

[0057] In addition, refer to the instructions attached Figures 8 to 10, this embodiment also provides another solution for the tightening controller 6. Specifically, the tightening controller 6 is an inner conical sleeve 62. The inner cavity of the inner conical sleeve 62 is a conical cavity with a larger bottom and a smaller top. The inner conical sleeve 62 is mounted on the outside of the bottom end of the sampling inner tube 5. The outer wall of the bottom end of the elastic pressure strip 52 is fixedly connected with a protrusion 57. The protrusion 57 is slidably adapted to the conical surface of the inner conical cavity of the inner conical sleeve 62. A pressure block 58 is provided on the outer wall of the sampling inner tube 5 corresponding to the position of the top of the inner conical sleeve 62. In this solution, the top end of the sampling inner tube 5 can be directly fixedly connected to the sealing cover 51 without sliding. A damping structure is provided on the inner conical sleeve 62. The damping structure is used to form damping with the inner walls of the primary drill pipe 21 and the secondary drill pipe 22.

[0058] In actual use, when the sampling inner tube 5 is installed in the primary drill pipe 21, the pressure block 58 squeezes the inner cone sleeve 62 when the sampling inner tube 5 is inserted downward, so that the bottom end of the inner cone sleeve 62 moves down to the lowest position, that is, it contacts the inner boss of the primary drill pipe 21 together with the elastic strip 52. When the sampling inner tube 5 needs to be extracted, the sampling inner tube 5 rises before the inner cone sleeve 62, and then the inner cone sleeve 62 descends relative to the sampling inner tube 5, and then the internal conical cavity of the inner cone sleeve 62 gradually squeezes the raised portion 57, so that the elastic strip 52 deforms inward and squeezes the soil sample.

[0059] In the above embodiment, refer to the attached specification. Figure 7The locking assembly is a locking rod 511, which is laterally slidably installed in the blocking cover 51, and an elastic member, such as a spring, is provided between the locking rod 511 and the blocking cover 51. The elastic member is used to provide an elastic force for the locking rod 511 to move outward, and a locking groove 211 that is mutually engaged with the locking rod 511 is provided in the primary drill pipe 21. The locking sleeve 71 is a cylindrical structure, and the unlocking structure and the locking structure inside the locking sleeve 71 are an inner buckle convex step 72, and the inner buckle convex step 72 is a convex ring structure formed inside the locking sleeve 71. A wedge-shaped buckle 512 is fixedly connected to the locking rod 511, and the outer side of the wedge-shaped buckle 512 is a buckling part. The bottom port of the locking sleeve 71 is set as a tapered mouth, and the top of the wedge-shaped buckle 512 is set as an inclined surface that slides and adapts to the tapered mouth at the bottom of the locking sleeve 71. When the locking rod 511 is unlocked, the locking rod 511 is unlocked and the locking rod 511 is unlocked.

[0060] In the above embodiment, in order to avoid the sampling inner tube 5 and the primary drill pipe 21 from contacting too closely and causing excessive pulling resistance, a gap is reserved between the main body of the sampling inner tube 5 and the inner wall of the primary drill pipe 21. Therefore, in actual use, the primary drill pipe 21 cannot directly transmit the internal extrusion support force to the sampling inner tube 5. During the actual sampling process, there are many rock layers and the required sample diameter is large (that is, the diameter of the primary drill pipe 21 is relatively large during drilling). After sampling, the soil sample in the sampling inner tube 5 is basically a rock column. During extraction, the gravity of the rock column is relatively large, and the resistance provided by the elastic layer 52 to the rock column by inward extrusion is relatively insufficient. Therefore, there is a risk of the rock column sliding downward during the extraction process, especially when the sampling inner tube 5 is initially pulled, the rock column will still form a residual connection with the rock layer, which makes the rock column more likely to slide during the initial extraction. For this reason, the present embodiment also provides the following solution. For details, please refer to the attached manual. Figures 11 to 13The sampling inner tube 5 is a thin-walled elastic part, for example, a plastic thin-walled barrel structure is used. The damping part on the inner cone sleeve 62 is a seal 621. The seal 621 is fixedly installed on the top of the inner cone sleeve 62 to form a seal between the inner cone sleeve 62 and the inner wall of the primary drill pipe 21 (or secondary drill pipe 22), as well as between the inner cone sleeve 62 and the sampling inner tube 5. An injection channel 73 is provided in the locking sleeve 71. The injection channel 73 is connected to the high-pressure water injection pump through a pipeline. A guide flow channel 514 corresponding to the injection channel 73 is provided in the sealing cover 51. A liquid outlet groove 515 is provided on the side wall of the sealing cover 51. The guide flow channel 514 is connected to the liquid outlet groove 515.

[0061] In actual use, before pulling up the sampling inner tube 5, water is first injected into the injection channel 73, so that the water source flows through the injection channel 73 and the guide channel 514 to the liquid outlet 515 on the outer wall of the locking rod 511, thereby filling the gap between the outer wall of the sampling inner tube 5 and the primary drill pipe 21 with water, wherein leakage is allowed to occur between the sealing cover 51 and the primary drill pipe 21 or between the inner cone sleeve 62 and the primary drill pipe 21. Under the high-pressure water injection condition of the high-pressure water pump, even if leakage occurs, the water outside the sampling inner tube 5 can have a certain pressure, thereby increasing the resistance between the sampling inner tube 5 and the rock column with the help of this pressure. At the same time, when the sampling inner tube 5 starts to be lifted, it can help to push the inner cone sleeve 62 downward relative to the sampling inner tube 5, thereby during the rising process of the sampling inner tube 5 , which can improve the overall carrying capacity of the soil sample inside the sampling inner tube 5. When the sampling inner tube 5 is about to be taken out, when the sampling inner tube 5 is initially exposed (at this time, the sampling inner tube 5 has not been completely removed, and some water still remains between the secondary drill pipe 22 at the top and the sampling inner tube 5, which can also provide a certain water pressure), large pliers or other fixings can be used to clamp and squeeze the outer wall of the sampling inner tube 5, so that the soil sample can be completely taken out in conjunction with the lifting of the sampling inner tube 5. Moreover, since the inner cone sleeve 62 has sufficient thrust to move downward relative to the sampling inner tube 5 under the action of water pressure when the extraction begins, the displacement of the inner cone sleeve 62 relative to the protrusion 57 can be increased, thereby improving the squeezing effect of the inner cone sleeve 62 on the elastic layering strip 52, thereby improving the pressure and carrying capacity of the elastic layering strip 52 on the bottom end of the soil sample.

[0062] In addition, refer to the instructions attached Figure 13 A V-groove structure is provided on the top of the seal 621, which can strengthen the sealing effect between the seal 621 and the primary drill pipe 21 (or secondary drill pipe 22) and the sampling inner tube 5 under the action of water pressure, reduce the outflow of water from this place, and improve the pushing effect of water pressure on the inner cone sleeve 62.

[0063] Furthermore, in the above embodiment, since the sampling device can be adapted to a variety of sampling environments, when facing an environment with a relatively dry surface and high dust content, the initial drilling process of the primary drill pipe 21 will cause dust and dirt to fly up from the ground, forming dust, which will affect the sampling environment and easily cause gravel to splash, thereby posing a safety hazard. For this purpose, the present embodiment also provides the following solution, which can be found in the attached manual. Figure 2 and Figure 14 Specifically, the anti-dust assembly 4 includes a protective cover 41, which is installed at the bottom end of the feed drive frame 12. A double-conical pressure ring 42 is fixedly installed inside the protective cover 41. The top and bottom of the double-conical pressure ring 42 are both set to conical surfaces. The protective cover 41 and the double-conical pressure ring 42 are both provided with guide holes for accommodating the primary drill pipe 21 and the secondary drill pipe 22 to pass through. An atomizing nozzle 43 is provided at the top of the inner cavity of the protective cover 41, and the atomizing nozzle 43 is connected to the water pump structure through a pipeline.

[0064] Before drilling begins, the travel drive assembly 3 drives the drilling assembly 1 to move to the specified position, adjusts the angle of the feed drive frame 12, and then lowers the feed drive frame 12 so that the protective cover 41 contacts the ground. At the same time, the lower conical surface of the double-conical pressure ring 42 is pressed into the ground soil layer to compact the area to be drilled. Then, the drill pipe assembly 2 is installed and driven by the drilling rig 11 to start drilling. During drilling, the drill pipe assembly 2 passes through the guide holes on the protective cover 41 and the double-conical pressure ring 42. Since the double-conical pressure ring 42 has compacted the soil layer in the area near the borehole (the double-conical pressure ring 42 can also guide the drill pipe assembly 2), , improving drilling accuracy), thereby reducing the generation of dust, especially avoiding the generation of flying stones. At the same time, the protective cover 41 can effectively shield the drilling area to further prevent the spread of dust. If necessary, spray dust reduction can be carried out through the atomizing nozzle 43. The above-mentioned protective cover 41 and the double-conical pressure ring 42 can be assembled with two sets of structures, so that when the drilling component 1 and the travel drive component 3 need to leave, the two sets of structures can be controlled to separate to avoid interference. For example, the two sets of structures can be slidably installed at the bottom of the feed drive frame 12, and the separation or combination of the two can be controlled by manual control or the addition of a linear drive structure (such as a hydraulic cylinder).

[0065] It should be noted that the sampling inner tube 5 provided in this embodiment can be reused, and the sealing cover 51 and the sampling inner tube 5 can be detachably connected using a detachable mounting structure, so that when the sampling inner tube 5 encounters a situation where it cannot be reused, the sealing cover 51 can be recycled. Moreover, under limited conditions, one or two groups of sealing covers 51 can be set up to be used in conjunction with multiple groups of sampling inner tubes 5. That is, after extracting the sampling inner tube 5, the sealing cover 51 can be installed on a new sampling inner tube 5, and the sealing cover 51 can be recycled, which relatively reduces the use cost of the equipment.

[0066] Refer to the instruction manual Figure 15 The present invention also provides a dust-proof sampling method for geological and mineral exploration, comprising the following steps:

[0067] Step 1: Operate the travel drive assembly 3 to drive the feed drive frame 12 to the sampling area, and adjust the angle of the feed drive frame 12 to make it vertical;

[0068] Step 2: dock the primary drill pipe 21 equipped with the sampling inner tube 5 with the output shaft of the drilling rig 11, and drive the drilling rig 11 to start descending, so that the drilling rig 11 drives the primary drill pipe 21 to start drilling;

[0069] Step 3: After the primary drill pipe 21 is drilled, the drill rig 11 is stopped and driven away from the sampling area. The extraction rod 7 is inserted into the primary drill pipe 21, the locking sleeve 71 is docked with the blocking cover 51, the blocking cover 51 is unlocked, and the extraction rod 7 is pulled up to pull out the sampling inner tube 5 to obtain a soil sample. The sample is then marked according to the current drilling depth.

[0070] Step 4: Install a new set of sampling inner tubes 5 into the primary drill pipe 21, and dock a section of secondary drill pipe 22 on top of the primary drill pipe 21. Dock the section of secondary drill pipe 22 with the output shaft of the drill rig 11, and drive the drill rig 11 to start descending again, so that the drill rig 11 drives the primary drill pipe 21 to continue drilling;

[0071] Step 5: After the secondary drill pipe 22 is drilled in, repeat the above step 3;

[0072] Step 6: Install a new set of sampling inner tubes 5 into the primary drill pipe 21, and dock a new section of secondary drill pipe 22 on top of the original secondary drill pipe 22. This section of secondary drill pipe 22 is docked with the output shaft of the drill rig 11, and the drill rig 11 is driven to start descending again, so that the drill rig 11 drives the primary drill pipe 21 to continue drilling;

[0073] Step 7: Repeat steps 5 and 6 above until all soil samples within the required sampling depth are collected.

[0074] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A dust-proof sampling device for geological and mineral exploration, characterized by: It comprises a drilling assembly (1), a drill pipe assembly (2), a sampling inner tube (5) and an extraction rod (7), wherein the drilling assembly (1) comprises a drilling machine (11) and a feed drive frame (12); The drill pipe assembly (2) comprises a primary drill pipe (21) and multiple secondary drill pipes (22); the sampling inner pipe (5) is arranged inside the primary drill pipe (21); a sealing cover (51) is installed at the top of the sampling inner pipe (5); a locking assembly is provided between the sealing cover (51) and the primary drill pipe (21); a plurality of groups of elastic strips (52) are provided at the bottom of the sampling inner pipe (5); and an inner boss that contacts and cooperates with the bottom of the elastic strips (52) is provided at the bottom of the inner cavity of the primary drill pipe (21); A tightening controller (6) is further provided on the outer side of the bottom of the sampling inner tube (5), and the tightening controller (6) is used to cause the elastic pressure strip (52) to bend inwardly; A locking sleeve (71) is fixedly mounted on the bottom end of the extraction rod (7), and an unlocking structure and a locking structure are provided in the locking sleeve (71); The tightening controller (6) is an inner conical sleeve (62), the inner cavity of the inner conical sleeve (62) is a conical cavity, the inner conical sleeve (62) is sleeved on the outside of the bottom end of the sampling inner tube (5), the outer wall of the bottom end of the elastic pressure strip (52) is fixedly connected with a protrusion (57), the protrusion (57) is slidably adapted to the conical surface of the inner conical cavity of the inner conical sleeve (62), the outer wall of the sampling inner tube (5) is provided with a pressure block (58) at a position corresponding to the top of the inner conical sleeve (62), the top end of the sampling inner tube (5) is fixedly connected to the sealing cover (51), and a damping structure is provided on the inner conical sleeve (62); The sampling inner tube (5) is a thin-walled elastic member. The locking sleeve (71) is provided with an injection channel (73). The injection channel (73) is connected to a high-pressure water injection pump through a pipeline. The blocking cover (51) is provided with a guide channel (514) corresponding to the injection channel (73). A liquid outlet groove (515) is provided on the side wall of the blocking cover (51), and the guide channel (514) is communicated with the liquid outlet groove (515).

2. The dust-proof sampling device for geological and mineral exploration according to claim 1, characterized in that: The locking assembly is a locking rod (511), the locking rod (511) is installed in the blocking cover (51) in a transverse sliding manner, and an elastic member is provided between the locking rod (511) and the blocking cover (51), the elastic member is used to provide an elastic force for the locking rod (511) to move outward, the primary drill pipe (21) is provided with a locking groove (211) that is mutually engaged with the locking rod (511), and the locking sleeve (71) is a cylindrical structure The unlocking structure and the engaging structure inside the locking sleeve (71) are an inner buckle convex step (72), and the inner buckle convex step (72) is a convex ring structure formed inside the locking sleeve (71). A wedge-shaped buckle (512) is fixedly connected to the locking rod (511), and the bottom port of the locking sleeve (71) is set as a tapered port, and the top of the wedge-shaped buckle (512) is set as an inclined surface structure that slides and fits with the tapered port at the bottom of the locking sleeve (71).

3. The dust-proof sampling device for geological and mineral exploration according to claim 2, characterized in that: The damping member on the inner cone sleeve (62) is a sealing member (621), which is fixedly mounted on the top end of the inner cone sleeve (62), and a V-shaped groove structure is provided on the top end of the sealing member (621).

4. The dust-proof sampling device for geological and mineral exploration according to claim 3, characterized in that: A drill head (23) is provided at the bottom of the primary drill pipe (21), and threaded butt joint structures are provided between the primary drill pipe (21) and the secondary drill pipe (22), between adjacent secondary drill pipes (22), between the primary drill pipe (21) and the output shaft of the drilling rig (11), and between the secondary drill pipe (22) and the output shaft of the drilling rig (11).

5. The dust-proof sampling device for geological and mineral exploration according to claim 4, characterized in that: The sampling device further includes a walking drive assembly (3), the walking drive assembly (3) including a walking machine (31) and a manipulating arm (32), the walking machine (31) being used to drive the drilling assembly (1) to walk, the manipulating arm (32) being used to drive the feed drive frame (12) to swing and move up and down to adapt to the ground environment of the actual sampling point, and the feed drive frame (12) being mounted on the manipulating arm (32), the drilling rig (11) being slidably arranged on the feed drive frame (12), and the feed drive frame (12) being provided with a mobile driving device for driving the drilling rig (11) to move.

6. The dust-proof sampling device for geological and mineral exploration according to claim 5, characterized in that: The sampling device further includes a dust prevention component (4), the dust prevention component (4) including a protective cover (41), the protective cover (41) being mounted on the bottom end of the feed drive frame (12), a double-conical pressure ring (42) being fixedly mounted inside the protective cover (41), the top and bottom of the double-conical pressure ring (42) being both configured as conical surfaces, the protective cover (41) and the double-conical pressure ring (42) being both provided with guide holes for accommodating the primary drill pipe (21) and the secondary drill pipe (22) passing therethrough, an atomizing nozzle (43) being provided at the top of the inner cavity of the protective cover (41), and the atomizing nozzle (43) being connected to a water pump structure via a pipeline.

7. A sampling method for the dust-proof sampling device for geological and mineral exploration according to claim 6, characterized in that: The following steps are involved: Step 1: Operate the travel drive assembly (3) to drive the feed drive frame (12) to reach the sampling area, and adjust the angle of the feed drive frame (12) to make it vertical; Step 2: docking the primary drill pipe (21) equipped with the sampling inner tube (5) with the output shaft of the drilling rig (11), and driving the drilling rig (11) to start descending, so that the drilling rig (11) drives the primary drill pipe (21) to start drilling; Step 3: After the primary drill pipe (21) is drilled in, the drill rig (11) is stopped and driven away from the sampling area. The extraction rod (7) is inserted into the primary drill pipe (21), the locking sleeve (71) is docked with the blocking cover (51), the blocking cover (51) is unlocked, and the extraction rod (7) is pulled up to pull out the sampling inner tube (5) to obtain a soil sample; Step 4: Install a new set of sampling inner tubes (5) into the primary drill pipe (21), and dock a section of secondary drill pipe (22) on the top of the primary drill pipe (21), dock the section of secondary drill pipe (22) with the output shaft of the drilling rig (11), and drive the drilling rig (11) to start descending again, so that the drilling rig (11) drives the primary drill pipe (21) to continue drilling; Step 5: After the secondary drill pipe (22) is drilled in, repeat the above step 3; Step 6: Install a new set of sampling inner tubes (5) into the primary drill pipe (21), and dock a new section of secondary drill pipe (22) on the top of the original secondary drill pipe (22), dock the section of secondary drill pipe (22) with the output shaft of the drilling rig (11), and drive the drilling rig (11) to start descending again, so that the drilling rig (11) drives the primary drill pipe (21) to continue drilling; Step 7: Repeat steps 5 and 6 above until all soil samples within the required sampling depth are collected.

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