Mineral aerosol sampling device for concealed rare earth mine deep coverage area

Abstract

The utility model relates to a mineral aerosol sampling device for a concealed rare earth mine deep coverage area. The mineral aerosol sampling device comprises a bracket, a retracting and releasing mechanism, a low background gas collecting pipe and a sampling mechanism, the sampling mechanism is connected to the underground moving end of the low background gas collecting pipe, the overground part of the low background gas collecting pipe is connected with the receiving and releasing mechanism, and the receiving and releasing mechanism is arranged on the support and is configured to control the sampling mechanism to be located at different underground depth positions so as to achieve continuous sampling of mine texture aerosol at the different underground depth positions; wherein the sampling mechanism comprises an automatic depth-keeping sealing valve, a cutting head and a filter membrane assembly which are arranged from bottom to top, and the filter membrane assembly is fixedly connected and communicated with the underground moving end of the low background gas collecting pipe. According to the device and the method, continuous sampling of ore texture aerosol at different underground depth positions in a bastnaesite type rare earth ore deep coverage area is realized.

Description

Technical Field

[0001] This application belongs to the technical field of gas sampling equipment, and more particularly relates to a mineral aerosol sampling device for deeply covered areas of concealed rare earth mines. Background Art

[0002] In the exploration work of bastnasite-type rare earth minerals, there is a situation where concealed rare earth ore bodies may exist deep underground in large-scale Quaternary deeply covered areas. Conventional geophysical and geochemical sampling is easily interfered by thick surface floating soil, resulting in a large number of concealed ore-induced anomalies not being quickly and effectively identified in geochemical exploration work. Therefore, it is of great importance for the sustainable development of rare earth mines to carry out scientific and effective depth-defined continuous sampling of mineral-containing rare earth aerosols in the Quaternary deeply covered areas of bastnasite-type rare earth mines, develop an automatic continuous sampling device with low background interference, portability, environmental protection, easy installation, no need for external power supply and capable of depth definition, and carry out rapid collection of micro-nano mineral aerosols containing bastnasite, aegirine-augite, fluorite, and barite in the deep part of the deeply covered area.

[0003] Currently, when conducting geogas measurement sampling for rare earth mineral exploration in a rare earth mineral area, generally, the device directly selected for geogas measurement sampling in mineral exploration is used for sampling, and the concentration of particulate matter is measured. The ore-induced anomaly level is directly evaluated based on the element concentration of the geogas measurement sample at the sampling moment. However, due to the possible existence of multiple types of areas deep underground in the Quaternary deeply covered area, in different types of areas, the geogas aerosol elements, mineral combinations, and vertical zonation may not be the same. Moreover, when using the concentration of the existing single-moment geogas measurement sample for ore-induced anomaly assessment, the assessment sample is relatively single, and it is impossible to continuously obtain particulate matter samples at different well depths, which cannot meet the research needs of particulate matter samples at different depth positions in the vertical zonation.

[0004] Therefore, there is an urgent need to provide a mineral aerosol sampling device for deeply covered areas of concealed rare earth mines. Summary of the Utility Model

[0005] In view of the above analysis, the embodiments of the present utility model aim to provide a mineral aerosol sampling device for deeply covered areas of concealed rare earth mines to solve one or more of the above problems existing in the prior art.

[0006] The object of the present utility model is achieved as follows:

[0007] A geological aerosol sampling device for deeply covered areas of buried rare earth ores, comprising a bracket, a retracting and releasing mechanism, a low-background gas collection pipe, and a sampling mechanism; the sampling mechanism is connected to the downhole mobile end of the low-background gas collection pipe, the above-ground part of the low-background gas collection pipe is connected to the retracting and releasing mechanism, and the retracting and releasing mechanism is arranged on the bracket and configured to control the sampling mechanism at different depth positions downhole to achieve continuous sampling of geological aerosols at different depth positions downhole; wherein, the sampling mechanism includes an automatic depth-setting sealing valve, a cutting head, and a filter membrane assembly arranged from bottom to top, and the filter membrane assembly is fixedly connected and communicated with the downhole mobile end of the low-background gas collection pipe.

[0008] Furthermore, it further includes a solar power supply device configured to supply power for the operation of the geological aerosol sampling device.

[0009] Furthermore, the filter membrane assembly includes a housing and a filter membrane frame, a material-changing seat, a material-changing mechanism, and a material-pushing mechanism arranged inside the housing; both the top and bottom of the housing are connected to the low-background gas collection pipe through pipelines; a low-background filter membrane is provided on the filter membrane frame; a plurality of filter membrane frames are arranged on the material-changing mechanism, and the material-changing mechanism is used to push the filter membrane frame onto the material-changing seat; the material-pushing mechanism is arranged at the corresponding position of the material-changing seat and used to push the filter membrane frame out of the material-changing seat.

[0010] Furthermore, a first telescopic hose mechanism is arranged at the top inside the housing, and a connecting pipe structure is provided at the bottom of the housing. The first telescopic hose mechanism and the connecting pipe structure are arranged correspondingly, and both are connected to the low-background gas collection pipe.

[0011] Furthermore, the first telescopic hose mechanism can abut against the edge of the filter membrane frame on the material-changing seat, the connecting pipe structure is connected to the inside of the material-changing seat, and the connecting pipe structure is communicated with the hollow material-changing seat.

[0012] Furthermore, a moving mechanism is also arranged inside the housing, the material-changing seat is connected to the moving mechanism, and the moving mechanism is configured to drive the material-changing seat to move in the vertical direction, enabling a plurality of filter membrane frames to be stacked on the material-changing mechanism in sequence in the vertical direction.

[0013] Furthermore, the filter membrane assembly further includes a storage bin, the storage bin includes multiple slots arranged from top to bottom in sequence, the filter membrane frame can be installed in the slots, and the material-pushing mechanism is configured to push the filter membrane frame into the slots of the storage bin.

[0014] Furthermore, the material-changing mechanism includes a release platform and a material-pulling mechanism. The release platform is arranged on one side of the material-changing seat, and a plurality of filter membrane frames are stacked obliquely on the release platform; the material-pulling mechanism is arranged on the moving mechanism and is configured to pull all the filter membrane frames to move onto the material-changing seat on the opposite side of the material-changing seat.

[0015] Further, the top surface of the release platform is an inclined surface, and the height of the inclined surface on the side away from the material change seat is higher than the height of the side close to the material change seat.

[0016] Further, the material change mechanism further includes an auxiliary release mechanism, which is configured to control the uppermost filter membrane frame to fall from the release platform to the material change seat and keep the remaining filter membrane frames fixed.

[0017] Compared with the prior art, the geological aerosol sampling device for deeply covered areas of concealed rare earth ores provided by the present utility model starts the retracting and releasing mechanism to slowly release the low-background gas collection tube to a predetermined position underground, the automatic depth-setting sealing valve is activated, and the gas at this depth starts to be collected; the collected gas passes through the automatic depth-setting sealing valve, the cutting head, and the low-background filter membrane in sequence to screen and capture specific particle-size particles; the retracting and releasing mechanism continues to move the automatic depth-setting sealing valve to the next predetermined position to repeat the sampling process; after continuous sampling is completed, the low-background gas collection tube and the filter membrane assembly are retracted back to the ground, and the low-background filter membrane is taken out to achieve accurate and continuous sampling of the gas at different depth positions underground in the deeply covered area of bastnasite-type rare earth ores. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present specification, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0019] Figure 1 is a schematic structural diagram of the geological aerosol sampling device for deeply covered areas of concealed rare earth ores provided by the present utility model;

[0020] Figure 2 is a schematic structural diagram of the filter membrane assembly provided by the present utility model Figure 1 ;

[0021] Figure 3 is a schematic structural diagram of the filter membrane assembly provided by the present utility model Figure 2 ;

[0022] Figure 4 is a schematic structural diagram of the filter membrane assembly provided by the present utility model Figure 3 ;

[0023] Figure 5 is a schematic structural diagram of the filter membrane assembly provided by the present utility model Figure 4 ;

[0024] Figure 6 is a schematic structural diagram of the auxiliary release mechanism of the filter membrane assembly provided by the present utility model.

[0025] Reference numerals:

[0026] 10, support; 11, retracting and deploying mechanism; 12, low-background gas collection tube; 13, cutting head; 14, automatic depth-setting sealing valve; 20, filter membrane assembly; 31, housing; 32, first telescopic hose mechanism; 33, filter membrane frame; 34, material-changing seat; 341, support arm; 40, accommodation bin; 50, material-changing mechanism; 51, release platform; 52, material-pulling mechanism; 521, material-pulling motor; 522, material-pulling plate; 53, auxiliary release mechanism; 531, baffle; 532, auxiliary support; 533, bottom tooth plate; 534, three-quarter gear; 535, counterweight; 536, meshing termination position; 537, speed-changing gear set; 538, synchronous belt assembly; 54, tension spring; 55, magnet; 56, side tooth plate; 57, damper; 60, moving mechanism; 601, moving platform. Detailed implementation manners

[0027] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings, in which the accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principles of the present invention, and are not used to limit the scope of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the term "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 mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] The terms "top", "bottom", "above...", "below" and "on..." described throughout the text are relative positions with respect to the components of the device, such as the relative positions of the top and bottom substrates inside the device. It can be understood that the device is multifunctional and is independent of its orientation in space.

[0030] Embodiment 1

[0031] A specific embodiment of the present utility model is as Figures 1 to 6As shown, a geological aerosol sampling device for deeply covered areas of concealed rare earth mines is disclosed, which includes a support 10, a retracting and releasing mechanism 11, a low-background gas collection tube 12, and a sampling mechanism; the sampling mechanism is connected to the underground mobile end of the low-background gas collection tube 12, the above-ground part of the low-background gas collection tube 12 is connected to the retracting and releasing mechanism 11, and the retracting and releasing mechanism 11 is arranged on the support 10 and is configured to control the sampling mechanism at different depth positions underground to achieve continuous sampling of geological aerosols at different depth positions underground. Among them, the sampling mechanism includes an automatic depth-setting sealing valve 14, a cutting head 13, and a filter membrane assembly 20 arranged from bottom to top. The filter membrane assembly 20 is fixedly connected and communicated with the underground mobile end of the low-background gas collection tube 12.

[0032] Specifically, the low-background gas collection tube 12 is drivingly connected to the retracting and releasing mechanism 11; a low-background filter membrane is provided inside the filter membrane assembly 20, and the filter membrane assembly 20 is communicated with the low-background gas collection tube 12; the low-background gas collection tube 12 is further sequentially connected with a cutting head 13 and an automatic depth-setting sealing valve 14 below the filter membrane assembly 20; the retracting and releasing mechanism 11 can release and wind up the low-background gas collection tube 12 to move the automatic depth-setting sealing valve 14 together with the cutting head 13 and the filter membrane assembly 20 to multiple predetermined positions underground for continuous sampling. The collected gas passes through the automatic depth-setting sealing valve 14, the cutting head 13, and the low-background filter membrane in sequence, and the particulate matter samples in the gas are collected on the low-background filter membrane.

[0033] In this embodiment, the geological aerosol sampling device for deeply covered areas of concealed rare earth mines further includes a solar power supply device, which is configured to supply power to the operation of the geological aerosol sampling device. Specifically, the solar panel is used to supply power to the power-consuming part of the device. The solar power supply device includes a solar panel and a battery. The solar panel is arranged on the support 10, and the solar panel is connected to the battery through a cable and can store the electric energy converted from solar energy in the battery.

[0034] In some embodiments, the filter membrane assembly 20 includes a housing 31, and a refueling mechanism 50 is arranged in the housing 31; a first telescopic hose mechanism 32 is arranged at the top inside the housing 31, and a communicating pipe structure is arranged at the bottom of the housing 31. The first telescopic hose mechanism 32 and the communicating pipe structure are arranged correspondingly, and both are connected to the low-background gas collection pipe 12; a filter membrane frame 33, and a low-background filter membrane is placed in the filter membrane frame 33; there are a plurality of filter membrane frames 33, all of which are arranged on the refueling mechanism 50. The refueling mechanism 50 is used to push the filter membrane frame 33 onto the refueling seat 34. The first telescopic hose mechanism 32 can abut against the edge of the filter membrane frame 33 on the refueling seat 34. The communicating pipe structure is connected to the inside of the refueling seat 34, and the communicating pipe structure communicates with the hollow refueling seat 34; a pushing mechanism is arranged at the corresponding position of the refueling seat 34 and is used to push the filter membrane frame 33 out of the refueling seat 34. The first telescopic hose mechanism 32 can be a first telescopic hose motor driving a first hose to move. A sealing cover is also connected to the end of the first hose. When the first telescopic hose mechanism 32 abuts against the refueling seat 34, the sealing cover just abuts against the filter membrane frame 33, so that the first hose is just in communication with the low-background filter membrane. At the same time, the sealing cover and the refueling seat 34 form a sealed environment, and the low-background filter membrane is in the sealed environment, thereby avoiding cross-contamination between samples during the sampling process.

[0035] Optionally, the filter membrane frame 33 has a rectangular structure, and a plurality of spaced struts are arranged inside the filter membrane frame 33 for supporting the low-background filter membrane. One low-background filter membrane is installed in each filter membrane frame 33.

[0036] After the filter membrane assembly 20 reaches a predetermined position, the refueling mechanism 50 pushes the filter membrane frame 33 onto the refueling seat 34, and the first telescopic hose mechanism 32 abuts against the filter membrane frame 33 to start sampling. After the low-background filter membrane sampling is completed, the first telescopic hose mechanism 32 resets, and the pushing mechanism pushes the filter membrane frame 33 out of the refueling seat 34. When the filter membrane assembly 20 moves to the next position, the above sampling steps are repeated.

[0037] In some embodiments, the filter membrane assembly 20 further includes a moving mechanism 60 arranged inside the housing 31. The refueling seat 34 is connected to the moving mechanism 60, and the moving mechanism 60 can drive the refueling seat 34 to move in the vertical direction; a plurality of filter membrane frames 33 are stacked in sequence in the vertical direction on the refueling mechanism 50. At each underground position, the refueling mechanism 50 sequentially pushes the filter membrane frames 33 from top to bottom onto the refueling seat 34; wherein, the communicating pipe structure includes a second telescopic hose mechanism.

[0038] The moving mechanism 60 includes a moving platform 601 and a moving linear motor. The material-changing seat 34 is connected to the moving platform 601. The moving linear motor is connected to the inner wall of the housing 31. The moving linear motor is drivingly connected to the moving platform 601. One end of the second telescopic hose mechanism communicates with the low-background gas collection pipe 12, and the opposite end passes through the bottom of the moving platform 601 and the material-changing seat 34 and communicates with the inside of the material-changing seat 34.

[0039] The second telescopic hose mechanism includes a second hose, which is connected to the moving platform 601, and its length changes with the movement of the moving platform 601.

[0040] By driving the lifting of the moving platform 601 through the moving linear motor, the height of the material-changing seat 34 can correspondingly change with the height after the material-changing mechanism 50 changes the material. Since the filter membrane frames 33 on the material-changing mechanism 50 are stacked up and down, during the continuous material-changing process, its overall height decreases. Therefore, through the height adjustment of the moving platform 601, the height of the material-changing seat 34 and the material-changing mechanism 50 is always kept relatively balanced, avoiding the situation that the filter membrane frame 33 cannot enter the material-changing seat 34.

[0041] In some embodiments, the filter membrane assembly 20 further includes a storage bin 40. The storage bin 40 includes multiple slots arranged in sequence from top to bottom. The size of the slots exactly corresponds to the filter membrane frame 33. The storage bin 40 is arranged outside one end of the material-changing seat 34, and the pushing mechanism is arranged outside the opposite end of the material-changing seat 34. The moving mechanism 60 is configured to control the filter membrane frame 33 on the material-changing seat 34 to stop beside the corresponding slot of the storage bin 40, and the pushing mechanism is configured to push the filter membrane frame 33 into the slot of the storage bin 40.

[0042] By providing the storage bin 40, since the storage bin 40 has multiple slots arranged in sequence from top to bottom and the size of the slots exactly corresponds to the filter membrane frame 33, after the low-background filter membrane sampling on the filter membrane frame 33 at one position is completed, the pushing mechanism pushes the filter membrane frame 33 into a slot of the storage bin 40 for sealed storage. Since the size of the slot exactly corresponds to the filter membrane frame 33, the filter membrane frame 33 just fits into the slot to seal the low-background filter membrane. After sampling at the next position, the pushing mechanism immediately pushes the filter membrane frame 33 into a slot in the lower layer to prevent cross-infection of the low-background filter membranes. The pushing mechanism includes a pushing motor and a pushing plate.

[0043] In some embodiments, the material changing mechanism 50 includes: a release platform 51 disposed on one side of the material changing seat 34. The top surface of the release platform 51 is an inclined surface, and the height of the inclined surface on the side away from the material changing seat 34 is higher than the height on the side close to the material changing seat 34. A plurality of filter membrane frames 33 are stacked on the release platform 51 in an inclined manner; a material pulling mechanism 52 disposed on the moving mechanism 60 and located on the other side opposite to the material changing seat 34; an auxiliary release mechanism 53 for controlling the topmost filter membrane frame 33 to fall from the release platform 51 to the material changing seat 34 and keeping the remaining filter membrane frames 33 fixed. Among them, part of the filter membrane frames 33 fall onto the material changing seat 34, and the material pulling mechanism 52 is used to pull all the filter membrane frames 33 to move onto the material changing seat 34; the height of the material changing seat 34 is lower than the lower side of the lowest end of the inclined filter membrane frame to be received. The auxiliary release mechanism 53 includes: a baffle 531 disposed on one side close to the lowest edge of the inclined surface of the release platform 51; an auxiliary motor drivingly connected to the baffle 531; a bottom tooth plate 533 connected to the top side of the baffle 531, and the bottom tooth plate 533 is vertically disposed; a three-quarter gear 534 meshingly connected to the bottom tooth plate 533. A counterweight 535 is disposed on the end surface corresponding to the meshing termination position 536 of the three-quarter gear 534 and the bottom tooth plate 533. It can also be understood that the counterweight 535 is disposed on the end surface of the three-quarter gear 534 and is located at the starting end of the 3 / 4 circumferential teeth of the three-quarter gear 534. The three-quarter gear 534 means that 3 / 4 of the outer circumference of the gear is provided with teeth, and the other 1 / 4 of the circumference is toothless. When the baffle 531 descends by the height of one filter membrane frame 33, the three-quarter gear 534 can rotate from the toothed end to the toothed end. That is to say, every time the three-quarter gear 534 rotates completely in a meshing manner, one filter membrane frame 33 can be pushed out; a speed change gear set 537 meshingly connected to the three-quarter gear 534. The speed change gear set 537 is located on the same side as the bottom tooth plate 533, and the meshing position of the speed change gear set 537 and the bottom tooth plate 533 is collinear; a synchronous belt assembly 538 drivingly connected to the speed change gear set 537; an auxiliary frame 532 disposed on the other side of the release platform 51 opposite to the baffle 531 and also drivingly connected to the synchronous belt assembly 538; a tension spring 54, one end of which is connected to the auxiliary frame 532 and the other end is connected to the auxiliary frame 532; magnets 55 are respectively disposed on the opposite side surfaces of the auxiliary frame 532 and the filter membrane frame 33, and the opposite surfaces of the magnet 55 on the auxiliary frame 532 and the magnet 55 on the filter membrane frame 33 are the same poles that repel each other. In this embodiment, first, the filter membrane frames 33 are stacked from top to bottom, and under the action of gravity, the filter membrane frames 33 can automatically slide in the direction of the material changing seat 34, but the sliding distance is short.

[0044] It should also be noted that the starting position of the material changing seat 34 and the position after stacking with the filter membrane frame 33 are such that the height of the material changing seat 34 is lower than the lowest end of the inclined filter membrane frame 33 to be received. After such a configuration, it is also necessary to ensure that one end of the filter membrane frame 33 after sliding can fall onto the sliding seat. At this time, there are the following two structural settings:

[0045] For the first structural setting, the gap between the release platform 51 and the entire filter membrane frame 33 and the material changing seat 34 is smaller than the width of the filter membrane frame 33. The inclination of the inclined surface is set such that after one end slides onto the material changing seat 34, the other end is still on the lower filter membrane frame 33, so that the sliding filter membrane frame 33 will not fall off.

[0046] For the second structural setting, the baffle 531 is driven to move by an auxiliary motor, and the initial position of the baffle 531 is set to be flush with the topmost filter membrane frame 33 of the release platform 51. When sampling is required, the baffle 531 moves down by the height of one filter membrane frame 33. When the baffle 531 moves, it drives the bottom toothed plate 533 to move. The movement of the bottom toothed plate 533 drives the three-quarter gear 534 to rotate. The rotation of the three-quarter gear 534 drives the speed change gear set 537 to rotate. The rotation of the speed change gear set 537 drives the synchronous belt assembly 538 to move. Furthermore, the auxiliary frame 532 moves towards the filter membrane frame 33. Since repulsive magnets 55 are provided on the side of the filter membrane frame 33 and the auxiliary frame 532, there is a repulsive force between the two. Among them, the driving directions among the speed change gear set 537, the three-quarter gear 534, and the synchronous belt assembly 538 need to be reasonably configured so that the auxiliary frame 532 moves towards the filter membrane frame 33.

[0047] After the filter membrane frame 33 is repelled, the baffle 531 just moves out of the lowest surface of the filter membrane frame 33 and is exactly located at the topmost surface of the filter membrane frame 33 below. It should be noted that the topmost surface of the baffle 531 should also be set to the same inclined surface as the inclined surface of the release platform 51 to avoid hindering the passage of the filter membrane frame 33 through the baffle 531. Then, the filter membrane frame 33 is pushed out by the relative force. Due to a certain thrust, the filter membrane frame 33 has an initial velocity, so that the gap between the release platform 51 and the material changing seat 34 can be set according to the magnitude of the thrust, regardless of the gap being smaller than the width of the filter membrane frame 33. After a part of the filter membrane frame 33 falls into the material changing seat 34, the material pulling mechanism 52 is controlled to pull the filter membrane frame 33 completely into the material changing seat 34, and the material pulling mechanism 52 resets.

[0048] After the filter membrane frame 33 pops out of the release platform 51, the latter part of the three-quarter gear 534 in the original rotation direction does not have teeth. At this time, the position of the counterweight 535 is set to the 3 o'clock position of the clock. At this time, under the action of gravity, the three-quarter gear 534 rotates in the original rotation direction, and the counterweight 535 rotates to the 6 o'clock position, and the three-quarter gear 534 meshes with the bottom toothed plate 533 again.

[0049] When the three-quarter gear 534 rotates in the original rotation direction and the counterweight 535 rotates from the 3 o'clock position to the 6 o'clock position, since there is no gear meshing connection, and at the same time, the installation position of the speed change gear set 537 also makes the speed change gear set 537 not meshed with the three-quarter gear 534. The auxiliary frame 532 is reset due to the acting force and the tension spring 54, the synchronous belt assembly 538 can be reset, and the three-quarter gear 534 is reset. It can be understood that during the process of the counterweight 535 rotating from the 3 o'clock position to the 6 o'clock position, the reset of the auxiliary frame 532 and the synchronous belt assembly 538 can be realized, and at the same time, the position of the bottom tooth plate 533 is ensured to be constant, and the next sampling operation can be carried out.

[0050] In some embodiments, the auxiliary release mechanism 53 further includes a side gear coaxially connected to the three-quarter gear 534, a side tooth plate 56, and a damper 57. The side tooth plate 56 meshes with the side gear, the side tooth plate 56 is drivingly connected to the damper 57, the side tooth plate 56 is slidably connected to the side slide rail, and both the side slide rail and the damper 57 are connected to the housing 31.

[0051] By setting the damper 57, the process of the counterweight 535 rotating from the 3 o'clock position to the 6 o'clock position can be made slow, the reset time of the components can be increased, and accurate reset can be realized.

[0052] In some embodiments, the material pulling mechanism 52 includes a material pulling motor 521 and a material pulling plate 522. The material pulling plate 522 is connected to the driving end of the material pulling motor 521, and a magnet 55 is connected to the material pulling plate 522. A support arm 341 is arranged in the material changing seat 34, and the support arm 341 plays a role in supporting the side wall of the material changing seat 34; the magnet 55 is inserted into the material changing seat 34, and a corresponding magnet 55 is arranged at the bottom of the filter membrane frame 33. The opposite sides of the magnet 55 on the material pulling plate 522 and the magnet 55 at the bottom of the filter membrane frame 33 are opposite poles that attract each other.

[0053] The material pulling motor 521 pushes the material pulling plate 522 to move, so that the magnet 55 extends into the material changing seat 34 and is located at the bottom of a part of the filter membrane frame 33 on the material changing seat 34 for attracting by the magnet 55. When the material pulling motor 521 resets, it drives the filter membrane frame 33 to move, so that the filter membrane frame 33 completely moves into the material changing seat 34. After the material pulling motor 521 resets, part of the magnet 55 is still located in the material changing seat 34, realizing the sealing of the magnet 55 moving port of the material changing seat 34.

[0054] The baffle 531 is arranged at the middle position of the release platform 51. A guide rod is passed through the auxiliary frame 532 to support the movement of the auxiliary frame 532. At the same time, a plurality of parallel magnets 55 are installed at intervals on the auxiliary frame 532, which can ensure the balance of the thrust force.

[0055] In this embodiment, the support 10 is fixed at the wellhead. The winding and unwinding mechanism 11 can be a winding and unwinding motor. The low-background gas collection pipe 12 is wound around the driving end of the winding and unwinding motor. Starting the winding and unwinding motor can release or wind up the low-background gas collection pipe 12. The automatic depth-setting sealing valve 14 can be an electric valve, which is controlled by a motor to open and close.

[0056] In this embodiment, the low-background gas collection pipe 12 has a certain strength and can bear the weight of each component underground. At the same time, it also has the function of guiding gas, and can smoothly introduce the gas at a specified depth underground into the filter membrane assembly 20 and discharge the gas filtered by the filter membrane assembly 20 to the wellhead during each sampling, so that the underground gas environment is always in a relatively stable state during the entire continuous sampling process, avoiding disturbing the underground air flow due to directly discharging the filtered gas into the well. The above settings in this embodiment can prevent the gas discharged from the filter membrane assembly 20 from disturbing the underground gas environment, causing the mixing of gases at different depth positions, and further causing cross-contamination of gas samples at different depths.

[0057] In one optional implementation manner, the low-background gas collection pipe 12 is also connected to a fan at the wellhead, which is used to provide a certain suction force for the gas to smoothly enter the filter membrane assembly 20 during the sampling process, and can also timely extract the gas discharged from the filter membrane assembly 20 under relatively closed conditions.

[0058] In this embodiment, due to the high background values of rare earth elements in the current geogas capture device and sampling filter membrane, there are easily errors in the sampling and analysis of the fluorocarbon cerite - aegirine - fluorite - barite micro-nano geological aerosol hidden in the deep underground in the prior art. Therefore, in this embodiment, the low-background gas collection pipe 12 is composed without rare earth element background, F, Ca, and quartz fiber, etc., which can reduce the interference with the elements in the gas. The low-background filter membrane uses a special material electron microscope filter membrane that can be used for SEM and TEM analysis. It is semi-transparent and without rare earth element background, F, Ca, and quartz fiber, etc. The pore size and distribution of it only allow target particulate matters with specific particle sizes to pass through and be effectively captured and retained, while blocking other irrelevant impurities and interfering substances.

[0059] In one optional implementation manner, the cutting head 13 can be a PM2.5 and PM10 cutting head 13, which includes a body, a particle impact chamber, and a particle size separator, and is used to collect the geogas aerosol sample with a set particle size.

[0060] During implementation, the bracket 10 is firmly placed at the wellhead position, and the retracting and deploying mechanism 11 is connected to the bracket 10 to control the release and winding of the low-background gas sampling tube. During sampling, the retracting and deploying mechanism 11 releases the low-background gas sampling tube 12 to gradually lower the sampling mechanism to a designated position underground. During the release process, the operating state of the retracting and deploying mechanism is monitored in real time to ensure that the low-background gas sampling tube can be lowered smoothly. When the low-background gas sampling tube is released and the filter membrane assembly 20, cutting head 13, and automatic depth-setting sealing valve 14 of the sampling mechanism are simultaneously lowered to a predetermined position underground, the automatic depth-setting sealing valve 14 is activated to open, and gas at this depth begins to be sampled. The cutting head 13 can screen the particle size of the particulate matter in the incoming gas and select the particulate matter that meets specific requirements. The automatic depth-setting sealing valve 14 can automatically open when it reaches the predetermined underground depth position. The sampled gas passes through the automatic depth-setting sealing valve 14, cutting head 13, and then through the low-background filter membrane of the filter membrane assembly 20 in sequence. Since the low-background filter membrane has a low background value and high filtration performance, it can effectively capture and retain the target particulate matter, reducing the influence of background interference and impurities. After completing the sampling of the mineral aerosol at a predetermined position, the automatic depth-setting sealing valve 14 closes, and the retracting and deploying mechanism 11 moves the low-background gas sampling tube to the next predetermined position to repeat the above sampling process. After completing continuous sampling, the low-background gas sampling tube 12 and the filter membrane assembly 20 are wound back to the ground, and the low-background filter membrane is taken out, thus completing the continuous sampling of the mineral aerosol at different depth positions underground in the deep coverage area of the bastnaesite-type rare earth ore.

[0061] Compared with the prior art, the device for sampling mineral aerosol in the deep coverage area of hidden rare earth ore provided by the present utility model has at least one of the following beneficial effects:

[0062] 1. By starting the retracting and deploying mechanism, the low-background gas sampling tube is slowly released underground. During the release process, the operating state of the retracting and deploying mechanism is monitored in real time to ensure that the low-background gas sampling tube can be lowered smoothly. When the low-background gas sampling tube is lowered to a predetermined position, the automatic depth-setting sealing valve is activated to start sampling the gas at this depth. The sampled gas passes through the automatic depth-setting sealing valve, cutting head, and low-background filter membrane in sequence to screen and capture particulate matter of a specific particle size. The retracting and deploying mechanism continues to move the automatic depth-setting sealing valve to the next predetermined position to repeat the sampling process. After completing continuous sampling, the low-background gas sampling tube and the filter membrane assembly are wound back to the ground, and the low-background filter membrane is taken out to achieve accurate and continuous sampling of the gas at different depth positions underground in the deep coverage area of the bastnaesite-type rare earth ore.

[0063] 2. The membrane can be replaced without damage through the membrane replacement mechanism, and the sealing cover and the membrane replacement seat form a sealed environment, which can avoid cross-contamination between samples during the sampling process.

[0064] 3. A low-background filter membrane is adopted, which has a low background value and can minimize the interference of impurities contained in itself on the sampling results to the greatest extent.

[0065] The above specific implementation manners further elaborate on the purpose, technical solution and beneficial effects of the present application. It should be understood that the above are only the specific implementation manners of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A geological aerosol sampling device for deeply covered areas of concealed rare earth ore, characterized in that, It includes a support, a retracting and deploying mechanism, a low-background gas collection tube, and a sampling mechanism; the sampling mechanism is connected to the downhole mobile end of the low-background gas collection tube, the above-ground part of the low-background gas collection tube is connected to the retracting and deploying mechanism, and the retracting and deploying mechanism is arranged on the support and is configured to control the sampling mechanism at different depth positions downhole to achieve continuous sampling of mineral aerosol at different depth positions downhole; Among them, the sampling mechanism includes an automatic depth-setting sealing valve, a cutting head, and a filter membrane assembly arranged from bottom to top, and the filter membrane assembly is fixedly connected and communicated with the downhole mobile end of the low-background gas collection tube.

2. The geological aerosol sampling device for deep overburden areas of concealed rare earth ores according to claim 1, characterized in that, It further includes a solar power supply device configured to supply power for the operation of the mineral aerosol sampling device.

3. The geological aerosol sampling device for deep overburden areas of concealed rare earth ores according to claim 1, characterized in that, The filter membrane assembly includes a housing and a filter membrane frame, a material-changing seat, a material-changing mechanism, and a material-pushing mechanism arranged in the housing; the top and bottom of the housing are both connected to the low-background gas collection tube through pipelines; a low-background filter membrane is provided on the filter membrane frame; a plurality of the filter membrane frames are arranged on the material-changing mechanism, and the material-changing mechanism is used to push the filter membrane frame onto the material-changing seat; the material-pushing mechanism is arranged at the corresponding position of the material-changing seat and is used to push the filter membrane frame out of the material-changing seat.

4. The ore-forming geological aerosol sampling device for deep overburden areas of concealed rare earth ores according to claim 3, wherein, A first telescopic hose mechanism is arranged at the top inside the housing, and a communicating pipe structure is arranged at the bottom of the housing. The first telescopic hose mechanism and the communicating pipe structure are arranged corresponding to each other, and both are connected to the low-background gas collection tube.

5. The geological aerosol sampling device for deep overburden areas of concealed rare earth ore according to claim 4, characterized in that, The first telescopic hose mechanism can abut against the edge of the filter membrane frame on the material-changing seat, the communicating pipe structure is connected to the inside of the material-changing seat, and the communicating pipe structure is communicated with the hollow material-changing seat.

6. The geological aerosol sampling device for deep overburden areas of concealed rare earth ores according to claim 5, characterized in that A moving mechanism is further arranged inside the housing, the material-changing seat is connected to the moving mechanism, and the moving mechanism is configured to drive the material-changing seat to move in the vertical direction, so that a plurality of the filter membrane frames can be stacked on the material-changing mechanism in sequence in the vertical direction.

7. The geological aerosol sampling device for deep overburden areas of concealed rare earth ore according to any one of claims 3 to 6, characterized in that, The filter membrane assembly further includes a storage bin, the storage bin includes a plurality of layers of slots arranged from top to bottom in sequence, the filter membrane frame can be inserted into the slots, and the material-pushing mechanism is configured to push the filter membrane frame into the slots of the storage bin.

8. The geological aerosol sampling device for deep overburden areas of concealed rare earth ores according to claim 6, characterized in that, The material-changing mechanism includes a release platform and a material-pulling mechanism. The release platform is arranged on one side of the material-changing seat, and a plurality of the filter membrane frames are stacked obliquely on the release platform; the material-pulling mechanism is arranged on the moving mechanism and is located on the other side opposite to the material-changing seat and is configured to pull all the filter membrane frames onto the material-changing seat.

9. The geological aerosol sampling device for deep overburden areas of concealed rare earth ore according to claim 8, characterized in that, The top surface of the release platform is an inclined surface, and the height of the inclined surface from the side far away from the material-changing seat is higher than the height of the side close to the material-changing seat.

10. The geological aerosol sampling device for deep overburden areas of concealed rare earth ore according to claim 8, characterized in that, The material-changing mechanism further includes an auxiliary release mechanism configured to control the topmost filter membrane frame to fall from the release platform to the material-changing seat and keep the remaining filter membrane frames fixed.

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