Geogas measuring device for mineral exploration

Abstract

The invention relates to the technical field of geogas measuring devices, and discloses a geogas measuring device for mineral exploration, the geogas measuring device comprises a sampling rod, a filtering and drying tank, a trapping tank and an air pump which are connected in sequence, and a filtering and drying mechanism is arranged in the filtering and drying tank; the filtering and drying mechanism comprises an inner cylinder arranged in the filtering and drying tank, an inner cavity of the inner cylinder is connected with the sampling rod through a gas transmission mechanism, a plurality of filter plates are arranged in the inner cylinder at equal intervals, the plurality of filter plates are of cavity structures, and drying agents are placed in cavities of the plurality of filter plates; circular sliding grooves are formed in the multiple filter plates, a lifting pipeline is arranged on the inner cylinder in a sliding mode, and the lifting pipeline is matched with the multiple circular sliding grooves. According to the geogas measuring device for mineral exploration, the filtering and drying specifications of geogas can be controlled according to the humidity and the particle content of the extracted geogas, so that the loss of metal elements in the filtering and drying process is reduced as much as possible, and the accuracy of a geogas detection result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of geogas measuring devices, and in particular to a geogas measuring device used for mineral exploration. Background Art

[0002] Geogas measurement is one of the methods of mineral exploration. At this stage, the focus of prospecting will increasingly tilt towards hidden mines buried deeper. Geogas is an ascending air current existing in the strata, in which the main gas composition is similar to that of the atmosphere, as well as a small amount of carbon dioxide and hydrocarbons. Under the pressure difference between the deep earth and the surface atmosphere, deep geogas will continue to move toward the surface along the cracks or fissures of the bedrock. Its overall movement direction is vertical from the core to the surface, and its speed is mainly controlled by power and channel resistance.

[0003] When the rising ground air flows through the ore deposit, it will carry nanoparticles formed by indicator elements related to the ore body. A certain transport mechanism in the stratum can lift different indicator elements from the ore body to the surface along the vertical direction of the stratum or a certain inclined direction, thereby forming a variety of element anomalies above the ore body. The combination of these abnormal elements can reflect the depth of the ore body.

[0004] Existing ground gas measurement devices include active and passive types. The active ground gas measurement device inserts a sampling rod into the stratum, and draws the ground gas into the sampling rod through a vacuum pump. The sampling rod is then connected to a filter and a dryer, so that the ground gas is filtered and dried to remove soil microparticles and soil water vapor, and then the ground gas enters the capture agent and is captured.

[0005] According to practical experience, after a certain period of air extraction, the amount of ground gas captured by the liquid capture agent will not increase significantly with the extension of the air extraction time. The reason is that the amount of ground gas per unit volume at the sampling point decreases. Therefore, it is necessary to further improve the capture efficiency of the liquid capture agent. However, the existing active ground gas measurement device will lose some metal elements during the filtering and drying process, resulting in inaccurate detection results of the samples captured by the capture agent.

[0006] Therefore, in order to solve the above technical problems existing in the prior art, a geogas measuring device for mineral exploration is proposed. Summary of the invention

[0007] The present invention provides a geogas measuring device for mineral exploration, which has the ability to control the specifications of filtering and drying the geogas according to the humidity and particle content of the extracted geogas, thereby minimizing the loss of metal elements in the filtering and drying processes, and improving the accuracy of geogas detection results. It solves the problem mentioned in the above background technology that the existing active geogas measuring devices will have some metal element loss in the filtering and drying processes, resulting in inaccurate detection results of samples captured by the capture agent.

[0008] The present invention provides the following technical solution: a geogas measurement device for mineral exploration, comprising a sampling rod, a filter drying tank, a capture tank and an air pump connected in sequence, wherein a filter drying mechanism is arranged in the filter drying tank; The filtering and drying mechanism comprises an inner cylinder arranged in the filtering and drying tank, the inner cavity of the inner cylinder is connected to the sampling rod through a gas transmission mechanism, a plurality of filter plates are arranged at equal intervals in the inner cylinder, the plurality of filter plates are all hollow structures, and desiccants are placed in the cavities of the plurality of filter plates; A plurality of the filter plates are provided with circular chutes, a lifting pipe is slidably provided on the inner cylinder, the lifting pipe is matched with the plurality of the circular chutes, and the lifting pipe is connected with the capture tank; After the sampling rod is inserted into the ground, the ground gas is extracted into the sampling rod through the operation of the air pump, and then the ground gas is transported to the inner cylinder through the gas transmission mechanism. After being filtered and dried by several of the filter plates, the ground gas is transported to the capture tank through the lifting pipeline for capture; The gas transmission mechanism includes a density measuring component, which is used to measure the density of ground gas and adjust the position of the lifting pipeline according to the density of ground gas, thereby adjusting the number of filter plates through which the ground gas passes.

[0009] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, wherein: a sampling hole is opened on the sampling rod, a first pipeline is arranged on the filter drying tank, the first pipeline is connected to the lifting pipeline through a corrugated pipe, a second pipeline and a third pipeline are arranged on the capture tank, and a capture liquid is placed in the capture tank; One end of the second pipe is connected to the first pipe, and the other end of the second pipe is arranged below the liquid level of the captured liquid. One end of the third pipe is connected to the air pump, and the other end of the third pipe is arranged above the liquid level of the captured liquid.

[0010] As an optional scheme of the geogas measuring device for mineral exploration described in the present invention, the gas transmission mechanism includes a fourth pipeline, a fifth pipeline and a solenoid valve, the fourth pipeline is arranged on the filter drying tank, the fifth pipeline is arranged on the sampling rod, the solenoid valve is provided with a sixth pipeline and a seventh pipeline, the sampling hole is connected to the sixth pipeline through the fifth pipeline, the seventh pipeline is provided with an eighth pipeline, and the eighth pipeline is connected to the inner cavity of the inner cylinder through the fourth pipeline.

[0011] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, wherein: the density measuring assembly includes a valve seat and an overflow valve core arranged in the seventh pipeline, and the valve seat and the overflow valve core are matched, and a spring is sleeved on the overflow valve core, and the spring provides an elastic force to the overflow valve core in the direction of the valve seat; The rate of extracting ground air into the seventh pipeline is quantitatively controlled by the solenoid valve. When the pressure applied to the overflow valve core by the air pressure at the overflow valve core exceeds the elastic force of the spring, the overflow valve core is separated from the valve seat, allowing the ground air to enter the eighth pipeline.

[0012] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, wherein: the density measuring assembly further comprises a knob threadedly connected to the seventh pipe, a spring seat is arranged on the knob, and the overflow valve core is slidably arranged on the spring seat; One end of the spring is connected to the overflow valve core, and the other end of the spring is connected to the spring seat.

[0013] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, wherein: the filtering and drying mechanism further includes an adjusting component, the adjusting component includes a first connecting plate slidably arranged on the filtering and drying tank, the first connecting plate is connected to the lifting pipe, a piston is slidably arranged in the seventh pipe, a second connecting plate is arranged on the piston, and the second connecting plate is transmission-connected to the first connecting plate through a transmission component; The piston is lifted by the ground air in the seventh pipe. According to different ground air densities, the time required for the air pressure at the overflow valve core to apply pressure to the overflow valve core exceeding the elastic force of the spring is different, so that the piston rises to different heights.

[0014] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, the transmission assembly includes a rotating rod rotatably arranged on the filter drying tank, a first transmission plate is arranged on the rotating rod, two second transmission plates are symmetrically slidably arranged on the first transmission plate, and the two second transmission plates are respectively hinged to the first connecting plate and the second connecting plate through hinge shafts.

[0015] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, the filtering and drying mechanism also includes a limit assembly, and the limit assembly is used to fix the position of the rotating rod after the overflow valve core controls the seventh pipeline to be connected with the eighth pipeline.

[0016] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, wherein: the limit assembly includes a ratchet wheel arranged on the rotating rod; The overflow valve core is provided with a third connecting plate, the third connecting plate is provided with a mounting plate, the mounting plate is provided with a pawl, and the pawl is adapted to the ratchet wheel.

[0017] As an optional solution of the geogas measuring device for mineral exploration described in the present invention, a plurality of elastic membranes are arranged circumferentially in the circular chute, and a complete circular surface is formed by the plurality of elastic membranes.

[0018] The present invention has the following beneficial effects: 1. The geogas measurement device used for mineral exploration filters the geogas through several linearly arranged filtering and drying components, and the filtering and drying specifications can be intelligently adjusted. The accuracy of the detection results can be maximized by balancing the influence of moisture and soil particles on the detection results and the adsorption of some metal elements during the filtering and drying process, which are two factors affecting the geogas detection results.

[0019] 2. The ground gas measurement device used for mineral exploration determines the content of water and soil particles in the ground gas by measuring the density of the ground gas. When the content of water and soil particles is high, the number of filter components that the ground gas passes through is controlled to increase, so as to remove clean water and soil particles as much as possible to avoid affecting the accuracy of the detection results. When the content of water and soil particles is low, the number of filter components that the ground gas passes through is controlled to decrease, so as to minimize the loss of metal elements in the ground gas during the filtering and drying process.

[0020] 3. In the geogas measuring device used for mineral exploration, the desiccant is filled in the hollow filter plate, which can integrate the filtering and drying steps together, optimize the device structure and reduce the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the present invention as a whole.

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the sampling rod in the present invention.

[0025] Figure 5 It is a schematic cross-sectional structural diagram of the gas transmission mechanism in the present invention.

[0026] Figure 6 For the present invention Figure 5 Schematic diagram of the local enlarged structure at point B in the middle.

[0027] Figure 7 It is a schematic diagram of the structure of the filter plate and the elastic membrane in the present invention.

[0028] Figure 8 It is a schematic diagram of the exploded structure of the density measurement component in the present invention.

[0029] Fig. 9 It is a schematic diagram of the exploded structure of the regulating component in the present invention.

[0030] In the figure: 100, sampling rod; 110, filter drying tank; 120, capture tank; 130, air pump; 140, first pipeline; 150, second pipeline; 160, third pipeline; 170, sampling hole; 200, gas transmission mechanism; 210, fourth pipeline; 220, fifth pipeline; 230, solenoid valve; 240, sixth pipeline; 250, seventh pipeline; 260, eighth pipeline; 270, density measurement component; 271, valve seat; 272, overflow valve core; 273, spring seat; 274, spring; 27 5. Knob; 300. Filter-drying mechanism; 310. Inner cylinder; 320. Filter plate; 330. Circular slide; 340. Lifting pipe; 350. Adjustment assembly; 351. First connecting plate; 352. Piston; 353. Second connecting plate; 360. Transmission assembly; 361. Rotating rod; 362. First transmission plate; 363. Second transmission plate; 370. Limiting assembly; 371. Ratchet; 372. Third connecting plate; 373. Mounting plate; 374. Ratchet; 380. Bellows; 390. Elastic membrane. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] For example, see Figure 1-Figure 4 , a geogas measuring device for mineral exploration, comprising a sampling rod 100, a filter drying tank 110, a capture tank 120 and an air pump 130 connected in sequence, wherein a filter drying mechanism 300 is arranged in the filter drying tank 110; The filter drying mechanism 300 includes an inner cylinder 310 disposed in the filter drying tank 110. The inner cavity of the inner cylinder 310 is connected to the sampling rod 100 through the gas transmission mechanism 200. A plurality of filter plates 320 are equidistantly disposed in the inner cylinder 310. The plurality of filter plates 320 are all hollow structures. Desiccants are placed in the cavities of the plurality of filter plates 320. A circular chute 330 is provided on each of the filter plates 320, and a lifting pipe 340 is slidably provided on the inner cylinder 310. The lifting pipe 340 is matched with each of the circular chute 330, and the lifting pipe 340 is connected to the capture tank 120; After the sampling rod 100 is inserted into the ground, the ground gas is extracted into the sampling rod 100 through the operation of the air pump 130, and then the ground gas is transported to the inner cylinder 310 through the gas transmission mechanism 200. After being filtered and dried by a plurality of filter plates 320, the ground gas is transported to the capture tank 120 through the lifting pipeline 340 for capture; The gas transmission mechanism 200 includes a density measuring assembly 270, which is used to measure the density of ground gas and adjust the position of the lifting pipe 340 according to the density of ground gas, thereby adjusting the number of filter plates 320 through which the ground gas passes; The sampling rod 100 is provided with a sampling hole 170, the filter drying tank 110 is provided with a first pipe 140, the first pipe 140 is connected to the lifting pipe 340 through a bellows 380, the capture tank 120 is provided with a second pipe 150 and a third pipe 160, and the capture tank 120 contains a capture liquid; One end of the second pipe 150 is connected to the first pipe 140, and the other end of the second pipe 150 is arranged below the liquid level of the captured liquid; one end of the third pipe 160 is connected to the air pump 130, and the other end of the third pipe 160 is arranged above the liquid level of the captured liquid; The gas delivery mechanism 200 includes a fourth pipeline 210, a fifth pipeline 220 and a solenoid valve 230. The fourth pipeline 210 is arranged on the filter drying tank 110, the fifth pipeline 220 is arranged on the sampling rod 100, and the solenoid valve 230 is provided with a sixth pipeline 240 and a seventh pipeline 250. The sampling hole 170 is connected to the sixth pipeline 240 through the fifth pipeline 220, and the seventh pipeline 250 is provided with an eighth pipeline 260. The eighth pipeline 260 is connected to the inner cavity of the inner cylinder 310 through the fourth pipeline 210.

[0033] In this embodiment, after the sampling rod 100 is inserted into the formation, the ground gas in the formation can enter the sampling hole 170 opened thereon, and the pipelines between the filter drying tank 110, the capture tank 120 and the air pump 130 can be disassembled. The ground gas enters the fifth pipeline 220 through the sampling hole 170, then enters the sixth pipeline 240 and the solenoid valve 230, enters the seventh pipeline 250, then enters the eighth pipeline 260 and the fourth pipeline 210, and then enters the inner cylinder 310.

[0034] The ground air entering the inner cylinder 310 will pass through multiple filter plates 320 upward. The filter plates 320 are hollow structures, and the filter holes opened on them can filter out some particles in the soil to avoid affecting the measurement results. The desiccant is filled in the cavity of the filter plate 320 to remove the moisture carried by the ground air at the same time.

[0035] After being filtered and dried by several groups of filter plates 320, the ground gas enters the lifting pipe 340, and then enters the first pipe 140 through the bellows 380. Then, the ground gas comes out from below the liquid surface of the capturing liquid in the capturing tank 120 through the second pipe 150. The metal elements in the ground gas are captured by the capturing liquid, and the remaining gas comes out of the capturing liquid and enters the third pipe 160, and finally enters the air pump 130 for discharge.

[0036] The capture liquid has the characteristics of strong capture ability, high capture efficiency, easy acquisition, and easy analysis. Considering the solubility properties of metal elements, the capture materials are mostly liquid solutions such as high-purity nitric acid and aqua regia.

[0037] Considering that the ground air must be dried and filtered to avoid the influence of soil particles and moisture on the test results, and the drying and filtering itself will absorb a part of the metal elements, affecting the test results. Therefore, the drying and filtering components are set to be adjustable to balance the above two influencing factors. Since the main components of the ground air are similar to those of the atmosphere, and the metal elements are trace components in the ground air, and the metal elements exist in the form of nanoparticles. The main factors affecting the density of the ground air are the amount of water and the soil particles carried. When the ground air density is detected to be large, it means that the ground air has a high moisture content and a high soil particle content. At this time, the ground air is controlled to pass through more filter plates 320 for filtration and drying. When the ground air density is detected to be small, it means that the ground air has a low moisture content and a low soil particle content. At this time, the ground air is controlled to pass through fewer filter plates 320 for filtration and drying.

[0038] Embodiment 2: This embodiment is an improvement on Embodiment 1. For details, please refer to Figure 2-Figure 8 The density measuring assembly 270 includes a valve seat 271 and an overflow valve core 272 disposed in the seventh pipe 250, and the valve seat 271 and the overflow valve core 272 fit together, and a spring 274 is sleeved on the overflow valve core 272, and the spring 274 provides an elastic force to the overflow valve core 272 in the direction of the valve seat 271; The rate of extracting the ground gas into the seventh pipeline 250 is quantitatively controlled by the solenoid valve 230. When the pressure applied by the air pressure at the overflow valve core 272 to the overflow valve core 272 exceeds the elastic force of the spring 274, the overflow valve core 272 is separated from the valve seat 271, so that the ground gas enters the eighth pipeline 260. The density measuring assembly 270 further includes a knob 275 threadedly connected to the seventh pipe 250 , a spring seat 273 is disposed on the knob 275 , and a relief valve core 272 is slidably disposed on the spring seat 273 ; One end of the spring 274 is connected to the overflow valve core 272, and the other end of the spring 274 is connected to the spring seat 273; The filter drying mechanism 300 further includes an adjustment assembly 350, which includes a first connection plate 351 slidably disposed on the filter drying tank 110, the first connection plate 351 being connected to the lifting pipe 340, a piston 352 being slidably disposed in the seventh pipe 250, a second connection plate 353 being disposed on the piston 352, and the second connection plate 353 being transmission-connected to the first connection plate 351 through a transmission assembly 360; The piston 352 is lifted by the ground gas in the seventh pipe 250. According to different ground gas densities, the time required for the pressure applied by the air pressure at the overflow valve core 272 to the overflow valve core 272 to exceed the elastic force of the spring 274 is different, so that the piston 352 rises to different heights; The transmission assembly 360 includes a rotating rod 361 rotatably arranged on the filter drying tank 110, on which a first transmission plate 362 is arranged, on which two second transmission plates 363 are symmetrically slidably arranged, and the two second transmission plates 363 are respectively hinged to the first connecting plate 351 and the second connecting plate 353 through hinge shafts.

[0039] In this embodiment, the filter plates 320 below the lifting pipe 340 will filter and dry the ground air, while the filter plates 320 above the lifting pipe 340 will basically not come into contact with the ground air. Therefore, the height of the lifting pipe 340 determines the number of filter plates 320 that the ground air passes through.

[0040] In order to achieve the purpose of automatically controlling the lifting and lowering of the lifting pipeline 340, the seventh pipeline 250 is set as a three-way pipe, and the pipeline in the horizontal direction is connected to the eighth pipeline 260, and a density measurement component 270 is installed between the two. A piston 352 is slidably installed in the vertical pipeline of the seventh pipeline 250, and a second connecting plate 353 is fixed on the piston 352, and a first connecting plate 351 is fixed on the lifting pipeline 340.

[0041] The solenoid valve 230 can control the input of ground gas into the seventh pipeline 250 at a fixed flow rate. According to the different density of the ground gas, when the air pressure at the overflow valve core 272 reaches the set pressure of the density measuring component 270, the density measuring component 270 opens the passage between the seventh pipeline 250 and the eighth pipeline 260 and starts to input the ground gas into the inner tube 310.

[0042] Since the density of ground air is different and the volume of ground air when the set pressure is reached is different, the piston 352 rises and falls at different heights in the vertical pipeline of the seventh pipeline 250. The height change of the piston 352 drives the first connecting plate 351 and the lifting pipeline 340 to rise and fall in the opposite direction through the transmission assembly 360.

[0043] If the density of ground gas is high, the liquid level in the seventh pipeline 250 when reaching the set pressure is low, and at this time, the positions of the first connecting plate 351 and the lifting pipeline 340 are high.

[0044] Specifically, a valve seat 271 is fixed in the transverse pipeline of the seventh pipeline 250, a knob 275 is threadedly connected to the rear end of the seventh pipeline 250, a spring seat 273 is fixed to the front end of the knob 275, a relief valve core 272 is slidably installed in the spring seat 273, and the relief valve core 272 blocks the valve seat 271 under the elastic force of the spring 274. The relief valve core 272 will be pushed open only when the air pressure at the relief valve core 272 in the seventh pipeline 250 exceeds the elastic force of the spring 274.

[0045] The set pressure of the density measuring component 270 is adjustable. The length of the internal thread on the rear side of the seventh pipe 250 is greater than the external thread of the knob 275. By turning the knob 275 to drive it to rotate forward and backward, the distance of the spring seat 273 can be changed to adjust the state of the spring 274 to adjust the elastic force generated on the overflow valve core 272.

[0046] The rotating rod 361 rotatably mounted on the outer side of the filter drying tank 110, the first transmission plate 362 fixed on the rotating rod 361, and the two second transmission plates 363 slidably mounted at both ends of the first transmission plate 362 constitute a lever. When the second connecting plate 353 rises, the first connecting plate 351 is driven down, and when the second connecting plate 353 descends, the first connecting plate 351 is driven up.

[0047] It should be supplemented that the air pump 130 and the solenoid valve 230 are prior art, and their specific structures and working principles are not described in detail here.

[0048] Embodiment 3: This embodiment is an improvement on Embodiment 2. For details, please refer to Figure 1-Figure 9 The filter drying mechanism 300 further includes a limit assembly 370, which is used to fix the position of the rotating rod 361 after the overflow valve core 272 controls the seventh pipeline 250 to be connected with the eighth pipeline 260; The limiting assembly 370 includes a ratchet 371 disposed on the rotating rod 361; A third connecting plate 372 is disposed on the overflow valve core 272 , a mounting plate 373 is disposed on the third connecting plate 372 , a ratchet 374 is disposed on the mounting plate 373 , and the ratchet 374 is adapted to the ratchet wheel 371 .

[0049] In this embodiment, after the seventh pipeline 250 is connected to the eighth pipeline 260, the position of the lifting pipeline 340 can be fixed. Therefore, a position limiting component 370 can be optionally installed.

[0050] Specifically, a ratchet 371 is fixed on the rotating rod 361, a third connecting plate 372 is fixed on the overflow valve core 272, a mounting plate 373 is fixed on the third connecting plate 372, and a ratchet 374 is fixed on the mounting plate 373. After the seventh pipeline 250 is connected with the eighth pipeline 260, the overflow valve core 272 keeps moving backward, driving the mounting plate 373 to move backward to the position of the ratchet 371, at which time the ratchet 374 clamps the ratchet 371 to restrict the rotating rod 361 from rotating, and the position of the lifting pipeline 340 is also fixed.

[0051] Embodiment 4: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 2-Figure 7 A plurality of elastic membranes 390 are arranged in the circumferential direction of the circular slide groove 330 , and a complete circular surface is formed by the plurality of elastic membranes 390 .

[0052] In this embodiment, in order to prevent the ground air from rising to the upper side through the circular chute 330, a total of four elastic membranes 390 are installed on the circular chute 330. The elastic membrane 390 is a quarter circle, and its tail is fixed to the inner wall of the circular chute 330. The head is in a horizontal state when not subject to external force, so as to seal the circular chute 330. When the lifting pipe 340 passes through the circular chute 330 downward, the four elastic membranes 390 will be pushed downward.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A geogas measurement device for mineral exploration, comprising a sampling rod (100), a filter drying tank (110), a capture tank (120) and an air pump (130) connected in sequence, characterized in that: The filter drying tank (110) is provided with a filter drying mechanism (300); The filtering and drying mechanism (300) comprises an inner cylinder (310) disposed in the filtering and drying tank (110); the inner cavity of the inner cylinder (310) is connected to the sampling rod (100) via a gas transmission mechanism (200); a plurality of filter plates (320) are equidistantly disposed in the inner cylinder (310); the plurality of filter plates (320) are all hollow structures; and desiccants are placed in the cavities of the plurality of filter plates (320); A circular chute (330) is provided on a plurality of the filter plates (320), a lifting pipe (340) is slidably provided on the inner cylinder (310), the lifting pipe (340) is matched with the plurality of the circular chute (330), and the lifting pipe (340) is connected to the collection tank (120); After the sampling rod (100) is inserted into the ground, the air pump (130) is operated to extract ground air into the sampling rod (100), and then the ground air is transported to the inner cylinder (310) through the gas transmission mechanism (200). After being filtered and dried by a plurality of the filter plates (320), the ground air is transported to the capture tank (120) through the lifting pipe (340) for capture; The gas transmission mechanism (200) comprises a density measurement component (270), and the density measurement component (270) is used to measure the density of ground gas and adjust the position of the lifting pipeline (340) according to the density of ground gas, thereby adjusting the number of filter plates (320) through which the ground gas passes.

2. A geogas measuring device for mineral exploration according to claim 1, characterized in that: The sampling rod (100) is provided with a sampling hole (170); the filter drying tank (110) is provided with a first pipe (140), the first pipe (140) is connected to the lifting pipe (340) via a bellows (380); the collection tank (120) is provided with a second pipe (150) and a third pipe (160); and a collection liquid is placed in the collection tank (120); One end of the second pipe (150) is connected to the first pipe (140), and the other end of the second pipe (150) is arranged below the liquid surface of the captured liquid. One end of the third pipe (160) is connected to the air pump (130), and the other end of the third pipe (160) is arranged above the liquid surface of the captured liquid.

3. A geogas measuring device for mineral exploration according to claim 2, characterized in that: The gas delivery mechanism (200) comprises a fourth pipeline (210), a fifth pipeline (220) and a solenoid valve (230); the fourth pipeline (210) is arranged on the filter-drying tank (110); the fifth pipeline (220) is arranged on the sampling rod (100); a sixth pipeline (240) and a seventh pipeline (250) are arranged on the solenoid valve (230); the sampling hole (170) is connected to the sixth pipeline (240) via the fifth pipeline (220); an eighth pipeline (260) is arranged on the seventh pipeline (250); and the eighth pipeline (260) is connected to the inner cavity of the inner cylinder (310) via the fourth pipeline (210).

4. A geogas measuring device for mineral exploration according to claim 3, characterized in that: The density measurement assembly (270) comprises a valve seat (271) and an overflow valve core (272) arranged in the seventh pipeline (250), wherein the valve seat (271) and the overflow valve core (272) are matched with each other, and a spring (274) is sleeved on the overflow valve core (272), and the spring (274) provides an elastic force to the overflow valve core (272) in the direction of the valve seat (271); The rate of extracting ground air into the seventh pipeline (250) is quantitatively controlled by the solenoid valve (230). When the pressure applied to the overflow valve core (272) by the air pressure at the overflow valve core (272) exceeds the elastic force of the spring (274), the overflow valve core (272) is separated from the valve seat (271), allowing the ground air to enter the eighth pipeline (260).

5. A geogas measuring device for mineral exploration according to claim 4, characterized in that: The density measurement assembly (270) further comprises a knob (275) threadedly connected to the seventh pipe (250), a spring seat (273) being arranged on the knob (275), and the overflow valve core (272) being slidably arranged on the spring seat (273); One end of the spring (274) is connected to the overflow valve core (272), and the other end of the spring (274) is connected to the spring seat (273).

6. A geogas measuring device for mineral exploration according to claim 4, characterized in that: The filter-drying mechanism (300) further comprises an adjusting assembly (350), the adjusting assembly (350) comprising a first connecting plate (351) slidably arranged on the filter-drying tank (110), the first connecting plate (351) being connected to the lifting pipe (340), a piston (352) being slidably arranged in the seventh pipe (250), a second connecting plate (353) being arranged on the piston (352), and the second connecting plate (353) being transmission-connected to the first connecting plate (351) via a transmission assembly (360); The piston (352) is lifted by the ground gas in the seventh pipe (250). Depending on the density of the ground gas, the time required for the pressure applied by the air pressure at the overflow valve core (272) to the overflow valve core (272) to exceed the elastic force of the spring (274) is different, so that the piston (352) rises to different heights.

7. A geogas measuring device for mineral exploration according to claim 6, characterized in that: The transmission assembly (360) comprises a rotating rod (361) rotatably arranged on the filter drying tank (110), a first transmission plate (362) being arranged on the rotating rod (361), two second transmission plates (363) being symmetrically slidably arranged on the first transmission plate (362), and the two second transmission plates (363) being movably hinged to the first connecting plate (351) and the second connecting plate (353) respectively via hinge shafts.

8. The geogas measuring device for mineral exploration according to claim 7, characterized in that: The filtering and drying mechanism (300) further comprises a position limiting assembly (370), wherein the position limiting assembly (370) is used to fix the position of the rotating rod (361) after the overflow valve core (272) controls the seventh pipeline (250) to be connected to the eighth pipeline (260).

9. The geogas measuring device for mineral exploration according to claim 8, characterized in that: The limiting assembly (370) comprises a ratchet (371) arranged on the rotating rod (361); The overflow valve core (272) is provided with a third connecting plate (372), the third connecting plate (372) is provided with a mounting plate (373), the mounting plate (373) is provided with a ratchet (374), and the ratchet (374) is adapted to the ratchet wheel (371).

10. The geogas measuring device for mineral exploration according to claim 1, characterized in that: A plurality of elastic membranes (390) are arranged in the circumferential direction of the circular slide groove (330), and a complete circular surface is formed by the plurality of elastic membranes (390).

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