A ground gas measurement device for mineral exploration

Abstract

The present invention relates to the technical field of ground gas measurement devices, and discloses a ground gas measurement device for mineral exploration, which includes a sampling rod, a filtering and drying tank, a trapping tank and an air pump connected in sequence. A filtering and drying mechanism is arranged in the filtering and drying tank; the filtering and drying mechanism includes an inner cylinder arranged in the filtering and drying tank. The inner cavity of the inner cylinder is connected to the sampling rod through an air conveying mechanism. A plurality of filter plates are equidistantly arranged in the inner cylinder. Each of the plurality of filter plates is of a cavity structure, and desiccants are placed in the cavities of each of the plurality of filter plates; circular sliding grooves are formed in each of the plurality of filter plates, and a lifting pipe is slidably arranged on the inner cylinder, and the lifting pipe is fitted with each of the plurality of circular sliding grooves. The ground gas measurement device for mineral exploration can control the filtering and drying specifications of the ground gas according to the humidity and particle content of the extracted ground gas, so as to minimize the loss of metal elements during the filtering and drying process and improve the accuracy of the ground gas detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of geogas measurement devices, and more particularly to a geogas measurement device for mineral exploration. Background Art

[0002] Geogas measurement is one of the methods for mineral exploration. At present, the focus of prospecting will increasingly shift to deeply buried concealed ore deposits. Geogas is an upward air current existing in the strata, the main gas components of which are similar to those of the atmosphere, as well as a small amount of carbon dioxide and hydrocarbons. Under the pressure difference between the deep part of the earth and the surface atmosphere, the deep geogas will continuously move along the bedrock cracks or fissures towards the surface, and its overall movement direction is vertically from the earth's core to the surface, and the speed is mainly controlled by the driving force and the channel resistance.

[0003] When the ascending geogas flow passes through the ore deposit, it will carry nanoparticles formed by indicator elements related to the ore body. A certain transmission mechanism in the strata can lift different indicator elements from the ore body along the vertical or a certain inclined direction of the strata to the surface, so that multiple element anomalies can be formed above the ore body, and the depth of the ore body can be reflected by combining these abnormal elements.

[0004] Existing geogas measurement devices include active and passive types. The active geogas measurement device inserts a sampling rod into the strata, and extracts the geogas into the sampling rod through an air extraction pump. The sampling rod is then connected to a filter and a dryer, so that the geogas is filtered and dried to remove soil microparticles and soil water vapor, and then the geogas enters the trapping agent and is trapped.

[0005] According to practical experience, after a certain air extraction time, the amount of geogas substances trapped by the liquid trapping agent will not increase significantly with the extension of the air extraction time, because the amount of geogas substances per unit volume at the sampling point decreases. Therefore, it is necessary to further improve the trapping efficiency of the liquid trapping agent. However, in the existing active geogas measurement device, during the filtration and drying processes, some metal elements are lost, resulting in inaccurate detection results of the samples trapped by the trapping agent.

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

[0007] The present invention provides a geogas measurement device for mineral exploration, which has the beneficial effect of being able 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 during the filtering and drying processes and improving the accuracy of the geogas detection results, and solving the problem that in the existing active geogas measurement device, during the filtering and drying processes, some metal elements are lost, resulting in inaccurate detection results of the samples trapped by the trapping agent mentioned in the above background art.

[0008] The present invention provides the following technical solution: A geogas measurement device for mineral exploration, comprising a sampling rod, a filtering and drying tank, a trapping tank and an air pump connected in sequence, wherein a filtering and drying mechanism is arranged in the filtering and drying tank;

[0009] The filtering and drying mechanism includes an inner cylinder arranged in the filtering and drying tank. The inner cavity of the inner cylinder is connected to the sampling rod through an air conveying mechanism. A plurality of filter plates are equidistantly arranged in the inner cylinder. All the plurality of filter plates are of a cavity structure, and desiccants are placed in the cavities of all the plurality of filter plates;

[0010] A plurality of circular sliding grooves are formed in all the plurality of filter plates. A lifting pipe is slidably arranged on the inner cylinder. The lifting pipe is fitted with all the plurality of circular sliding grooves, and the lifting pipe is connected to the trapping tank;

[0011] After the sampling rod is inserted into the ground, the geogas is extracted into the sampling rod by the operation of the air pump, and then the geogas is conveyed into the inner cylinder through the air conveying mechanism. After the geogas is filtered and dried by some of the plurality of filter plates, it is conveyed into the trapping tank through the lifting pipe for trapping;

[0012] The air conveying mechanism includes a density measurement component, which is used to measure the density of the geogas and adjust the position of the lifting pipe according to the density of the geogas, so as to adjust the number of the filter plates through which the geogas passes.

[0013] As an alternative solution of the geogas measurement device for mineral exploration of the present invention, wherein: Sampling holes are formed in the sampling rod. A first pipe is arranged on the filtering and drying tank. The first pipe is connected to the lifting pipe through a corrugated pipe. A second pipe and a third pipe are arranged on the trapping tank. A trapping liquid is placed in the trapping tank;

[0014] 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 trapping 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 trapping liquid.

[0015] As an alternative solution of the geogas measurement device for mineral exploration of the present invention, wherein: The air conveying mechanism includes a fourth pipe, a fifth pipe and an electromagnetic valve. The fourth pipe is arranged on the filtering and drying tank. The fifth pipe is arranged on the sampling rod. The electromagnetic valve is provided with a sixth pipe and a seventh pipe. The sampling hole is connected to the sixth pipe through the fifth pipe. An eighth pipe is arranged on the seventh pipe. The eighth pipe is connected to the inner cavity of the inner cylinder through the fourth pipe.

[0016] 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;

[0017] 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.

[0018] 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;

[0019] 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.

[0020] 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;

[0021] 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.

[0022] 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.

[0023] 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.

[0024] As an alternative solution of the geogas measurement device for mineral exploration according to the present invention, wherein: the limiting component includes a ratchet wheel arranged on the rotating rod;

[0025] A third connecting plate is arranged on the overflow valve core, an installation disc is arranged on the third connecting plate, a pawl is arranged on the installation disc, and the pawl is adapted to the ratchet wheel.

[0026] As an alternative solution of the geogas measurement device for mineral exploration according to the present invention, wherein: a plurality of elastic membranes are circumferentially arranged on the inner circumference of the circular sliding groove, and a complete circular surface is formed by the plurality of elastic membranes.

[0027] The present invention has the following beneficial effects:

[0028] 1. For the geogas measurement device for mineral exploration, the geogas is filtered by a plurality of linearly arranged filtering and drying components, and the filtering and drying specifications can be intelligently adjusted. 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, two influencing factors of the geogas detection results, the accuracy of the detection results is maximally improved.

[0029] 2. For the geogas measurement device for mineral exploration, the density of the geogas is measured to determine the content of moisture and soil particles in the geogas. When the content of moisture and soil particles is relatively high, the number of filtering components through which the geogas passes is controlled to increase, so as to try to remove moisture and soil particles completely and avoid affecting the accuracy of the detection results. When the content of moisture and soil particles is relatively low, the number of filtering components through which the geogas passes is controlled to decrease, so as to minimize the loss of metal elements in the geogas during the filtering and drying process.

[0030] 3. For the geogas measurement device for mineral exploration, the desiccant is filled in the hollow filter plate, and the two steps of filtering and drying can be integrated together, optimizing the device structure and reducing the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 It is a schematic cross-sectional structure diagram of the whole of the present invention.

[0033] Figure 3 For the present invention Figure 2 The partial enlarged structural schematic diagram at A in it.

[0034] Figure 4 It is a schematic cross-sectional structure diagram of the sampling rod in the present invention.

[0035] Figure 5 It is a schematic cross-sectional structure diagram of the gas transmission mechanism in the present invention.

[0036] Figure 6 For the present invention Figure 5 Schematic diagram of the partial enlarged structure at position B in the present invention.

[0037] Figure 7 Schematic diagram of the structure of the filter plate and the elastic membrane in the present invention.

[0038] Figure 8 Exploded schematic diagram of the density measurement assembly in the present invention.

[0039] Figure 9 Exploded schematic diagram of the adjustment assembly in the present invention.

[0040] In the figure: 100, sampling rod; 110, filter drying tank; 120, collection 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 assembly; 271, valve seat; 272, overflow valve core; 273, spring seat; 274, spring; 275, knob; 300, filter drying mechanism; 310, inner cylinder; 320, filter plate; 330, circular chute; 340, lifting pipeline; 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 disc; 374, ratchet pawl; 380, bellows; 390, elastic membrane. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Example 1, please refer to Figures 1 - 4 , a geogas measurement device for mineral exploration, including a sampling rod 100, a filter drying tank 110, a collection tank 120 and an air pump 130 connected in sequence, and a filter drying mechanism 300 is arranged in the filter drying tank 110;

[0043] The filtering and drying mechanism 300 includes an inner cylinder 310 disposed inside the filtering and drying tank 110. The inner cavity of the inner cylinder 310 is connected to the sampling rod 100 through the air conveying mechanism 200. A plurality of filter plates 320 are equidistantly arranged inside the inner cylinder 310. The plurality of filter plates 320 are all of cavity structures, and desiccants are placed in the cavities of the plurality of filter plates 320.

[0044] A plurality of circular chutes 330 are formed on the plurality of filter plates 320. A lifting pipe 340 is slidably arranged on the inner cylinder 310. The lifting pipe 340 fits with the plurality of circular chutes 330, and the lifting pipe 340 is connected to the collection tank 120.

[0045] After the sampling rod 100 is inserted into the ground, the ground gas is extracted into the sampling rod 100 by operating the air pump 130, and then the ground gas is conveyed to the inner cylinder 310 through the air conveying mechanism 200. After being filtered and dried by some of the plurality of filter plates 320, the ground gas is conveyed to the collection tank 120 through the lifting pipe 340 for collection.

[0046] The air conveying mechanism 200 includes a density measurement component 270. The density measurement component 270 is used to measure the density of the ground gas and adjust the position of the lifting pipe 340 according to the density of the ground gas, so as to adjust the number of filter plates 320 through which the ground gas passes.

[0047] Sampling holes 170 are formed on the sampling rod 100. A first pipe 140 is arranged on the filtering and drying tank 110. The first pipe 140 is connected to the lifting pipe 340 through a corrugated pipe 380. A second pipe 150 and a third pipe 160 are arranged on the collection tank 120, and a collection liquid is placed in the collection tank 120.

[0048] 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 collection 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 collection liquid.

[0049] The air conveying mechanism 200 includes a fourth pipe 210, a fifth pipe 220 and a solenoid valve 230. The fourth pipe 210 is arranged on the filtering and drying tank 110. The fifth pipe 220 is arranged on the sampling rod 100. A sixth pipe 240 and a seventh pipe 250 are arranged on the solenoid valve 230. The sampling hole 170 is connected to the sixth pipe 240 through the fifth pipe 220. An eighth pipe 260 is arranged on the seventh pipe 250, and the eighth pipe 260 is connected to the inner cavity of the inner cylinder 310 through the fourth pipe 210.

[0050] In this embodiment: After the sampling rod 100 is inserted into the formation, the earth gas in the formation can enter the sampling holes 170 formed thereon. The pipelines among the filtering and drying tank 110, the trapping tank 120 and the air pump 130 are detachable. The earth gas enters the fifth pipeline 220 through the sampling holes 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.

[0051] The earth gas entering the inner cylinder 310 will pass upward through a plurality of filter plates 320. The filter plates 320 are of a hollow structure, and part of the particles in the soil can be filtered through the filter holes formed thereon to avoid affecting the measurement results. And a desiccant is filled in the cavity of the filter plates 320 to simultaneously remove the moisture carried in the earth gas.

[0052] After being filtered and dried by several groups of filter plates 320, the earth gas enters the lifting pipeline 340, then enters the first pipeline 140 through the corrugated pipe 380. Then the earth gas comes out from below the liquid level of the trapping liquid in the trapping tank 120 through the second pipeline 150. The metal elements in the earth gas are captured by the trapping liquid, and the remaining gas comes out of the trapping liquid and enters the third pipeline 160, and finally enters the air pump 130 and is discharged.

[0053] The trapping liquid has the characteristics of strong trapping ability, high trapping efficiency, easy acquisition, easy analysis, etc. Considering the dissolution properties of metal elements, the trapping materials are mostly liquid solutions such as high-purity nitric acid and aqua regia.

[0054] Considering that the earth gas must be dried and filtered to avoid the influence of soil particles and moisture on the detection results, and the drying and filtering itself will adsorb part of the metal elements and affect the detection 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 earth gas are similar to those of the atmosphere, and the metal elements are trace components in the earth gas and exist in the form of nanoparticles. The main factors affecting the density of the earth gas are the amount of moisture and the soil particles carried. When it is detected that the density of the earth gas is large, it means that the moisture content of the earth gas is high and the soil particle content is high. At this time, the earth gas is controlled to pass through more filter plates 320 for filtering and drying. When it is detected that the density of the earth gas is small, it means that the moisture content of the earth gas is low and the soil particle content is low. At this time, the earth gas is controlled to pass through fewer filter plates 320 for filtering and drying.

[0055] Embodiment 2. This embodiment is an improved description based on Embodiment 1. Specifically, please refer to Figures 2 - 8 , the density measurement component 270 includes a valve seat 271 and an overflow valve core 272 arranged in the seventh pipeline 250, and the valve seat 271 and the overflow valve core 272 fit together. 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;

[0056] The rate of the ground gas extracted into the seventh pipeline 250 is quantitatively controlled by the solenoid valve 230. When the pressure exerted on 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 disengages from the valve seat 271, allowing the ground gas to enter the eighth pipeline 260.

[0057] The density measurement assembly 270 further includes a knob 275 threadedly connected to the seventh pipeline 250. A spring seat 273 is provided on the knob 275, and the overflow valve core 272 is slidably arranged on the spring seat 273.

[0058] 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.

[0059] The filter and drying mechanism 300 further includes an adjustment assembly 350. The adjustment assembly 350 includes a first connecting plate 351 slidably arranged on the filter and drying tank 110. The first connecting plate 351 is connected to the lifting pipeline 340. A piston 352 is slidably arranged in the seventh pipeline 250. A second connecting plate 353 is provided on the piston 352, and the second connecting plate 353 is drivingly connected to the first connecting plate 351 through a transmission assembly 360.

[0060] The piston 352 is lifted by the ground gas in the seventh pipeline 250. Depending on the different densities of the ground gas, the time required for the pressure exerted on the overflow valve core 272 by the air pressure at the overflow valve core 272 to exceed the elastic force of the spring 274 is different, so the rising height of the piston 352 is different.

[0061] The transmission assembly 360 includes a rotating rod 361 rotatably arranged on the filter and drying tank 110. A first transmission plate 362 is provided on the rotating rod 361. Two second transmission plates 363 are symmetrically and slidably arranged on the first transmission plate 362. The two second transmission plates 363 are respectively movably hinged to the first connecting plate 351 and the second connecting plate 353 through hinge shafts.

[0062] In this embodiment: A plurality of filter plates 320 below the position where the lifting pipeline 340 is located will filter and dry the ground gas, while the filter plates 320 above the position of the lifting pipeline 340 will basically not come into contact with the ground gas. Therefore, the height of the lifting pipeline 340 determines the number of filter plates 320 that the ground gas passes through.

[0063] To achieve the purpose of automatically controlling the lifting of the lifting pipeline 340, the seventh pipeline 250 is set as a tee-shaped pipe. The horizontal pipeline is communicated with the eighth pipeline 260, and a density measurement assembly 270 is installed between them. A piston 352 is slidably installed in the vertical pipeline of the seventh pipeline 250. A second connecting plate 353 is fixed on the piston 352, and a first connecting plate 351 is fixed on the lifting pipeline 340.

[0064] The solenoid valve 230 can be controlled to input the ground gas into the seventh pipeline 250 at a fixed flow rate. According to the different densities of the ground gas, when the air pressure at the overflow valve core 272 reaches the set pressure of the density measurement assembly 270, the density measurement assembly 270 opens the passage between the seventh pipeline 250 and the eighth pipeline 260, and starts to input the ground gas into the inner cylinder 310.

[0065] Since the densities of the ground gas are different, the volumes of the ground gas when reaching the set pressure are different. Therefore, the piston 352 rises and falls by different heights in the vertical pipeline of the seventh pipeline 250, and 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.

[0066] If the density of the ground gas is relatively high, the liquid level in the seventh pipeline 250 when reaching the set pressure is relatively low, and at this time, the positions of the first connecting plate 351 and the lifting pipeline 340 are relatively high.

[0067] Specifically, a fixed valve seat 271 is installed in the horizontal pipeline of the seventh pipeline 250. The rear end of the seventh pipeline 250 is threadedly connected to a knob 275. The front end of the knob 275 is fixed with a spring seat 273. An overflow valve core 272 is slidably installed in the spring seat 273, and the overflow valve core 272 blocks the valve seat 271 under the elastic force of the spring 274. The overflow valve core 272 will be pushed open only when the air pressure at the overflow valve core 272 in the seventh pipeline 250 exceeds the elastic force of the spring 274.

[0068] Moreover, the set pressure of the density measurement assembly 270 can be adjusted. The inner thread length at the rear side of the seventh pipeline 250 is greater than the outer thread of the knob 275. By turning the knob 275 to drive its forward and reverse rotation, 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.

[0069] A lever is formed by a rotating rod 361 rotatably installed outside the filter drying tank 110, a first transmission plate 362 fixed on the rotating rod 361, and two second transmission plates 363 slidably installed at both ends of the first transmission plate 362. When the second connecting plate 353 rises, it drives the first connecting plate 351 to descend, and when the second connecting plate 353 descends, it drives the first connecting plate 351 to rise.

[0070] It should be supplemented and explained that the air pump 130 and the solenoid valve 230 are prior arts, and their specific structures and working principles will not be elaborated here.

[0071] Embodiment 3. This embodiment is an improved description based on Embodiment 2. Specifically, please refer to Figures 1 - 9 , the filter drying mechanism 300 further includes a limiting component 370, and the limiting component 370 is used to fix the position of the rotating rod 361 after the overflow valve core 272 controls the communication between the seventh pipeline 250 and the eighth pipeline 260;

[0072] The limiting component 370 includes a ratchet wheel 371 arranged on the rotating rod 361;

[0073] A third connecting plate 372 is arranged on the overflow valve core 272, a mounting disc 373 is arranged on the third connecting plate 372, a pawl 374 is arranged on the mounting disc 373, and the pawl 374 is adapted to the ratchet wheel 371.

[0074] In this embodiment: After the seventh pipeline 250 and the eighth pipeline 260 are connected, the position of the lifting pipeline 340 can be fixed. Therefore, the limiting component 370 can be optionally installed.

[0075] Specifically, the ratchet wheel 371 is fixed on the rotating rod 361, the third connecting plate 372 is fixed on the overflow valve core 272, the mounting disc 373 is fixedly installed on the third connecting plate 372, and the pawl 374 is fixed on the mounting disc 373. After the seventh pipeline 250 and the eighth pipeline 260 are connected, the overflow valve core 272 keeps moving backward, driving the mounting disc 373 to move backward to the position of the ratchet wheel 371. At this time, the ratchet wheel 371 is blocked by the pawl 374 to restrict the rotation of the rotating rod 361, and then the position of the lifting pipeline 340 is also fixed.

[0076] Embodiment 4 is an improved description based on Embodiment 1. Specifically, please refer to Figures 2 - 7 , a plurality of elastic membranes 390 are circumferentially arranged on the inner circumference of the circular chute 330, and a complete circular surface is formed by the plurality of elastic membranes 390.

[0077] In this embodiment: In order to prevent the ground gas 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 membranes 390 are quarter-circular, their tails are fixed on the inner wall of the circular chute 330, and their heads are in a horizontal state when not subjected to external forces, sealing the circular chute 330. When the lifting pipeline 340 passes downward through the circular chute 330, the four elastic membranes 390 will be pushed downward.

[0078] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0079] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A geogas measurement device for mineral exploration, comprising a sampling rod (100), a filtering and drying tank (110), a trapping tank (120) and an air pump (130) connected in sequence, characterized in that: A filtering and drying mechanism (300) is arranged inside the filtering and drying tank (110). The filtering and drying mechanism (300) includes an inner cylinder (310) arranged inside the filtering and drying tank (110). The inner cavity of the inner cylinder (310) is connected to the sampling rod (100) through an air conveying mechanism (200). A plurality of filter plates (320) are equidistantly arranged inside the inner cylinder (310). The plurality of filter plates (320) are all of cavity structures, and desiccants are placed in the cavities of the plurality of filter plates (320). A plurality of circular sliding grooves (330) are formed on the plurality of filter plates (320). A lifting pipe (340) is slidably arranged on the inner cylinder (310). The lifting pipe (340) is fitted with all the plurality of circular sliding grooves (330). 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 the ground air into the sampling rod (100), and then the ground air is conveyed to the inner cylinder (310) through the air conveying mechanism (200). After the ground air is filtered and dried by a plurality of the filter plates (320), it is conveyed to the collection tank (120) through the lifting pipe (340) for collection. The air conveying mechanism (200) includes a density measurement component (270). The density measurement component (270) is used to measure the density of the ground air and adjust the position of the lifting pipe (340) according to the density of the ground air, so as to adjust the number of the filter plates (320) through which the ground air passes.

2. The geogas survey device for mineral exploration according to claim 1, characterized in that: Sampling holes (170) are formed on the sampling rod (100). A first pipe (140) is arranged on the filtering and drying tank (110). The first pipe (140) is connected to the lifting pipe (340) through a corrugated pipe (380). A second pipe (150) and a third pipe (160) are arranged on the collection tank (120). 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 level of the collection 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 collection liquid.

3. The geogas measurement device for mineral exploration according to claim 2, characterized in that: The air conveying mechanism (200) includes a fourth pipe (210), a fifth pipe (220) and a solenoid valve (230). The fourth pipe (210) is arranged on the filtering and drying tank (110). The fifth pipe (220) is arranged on the sampling rod (100). The solenoid valve (230) is provided with a sixth pipe (240) and a seventh pipe (250). The sampling hole (170) is connected to the sixth pipe (240) through the fifth pipe (220). An eighth pipe (260) is arranged on the seventh pipe (250). The eighth pipe (260) is connected to the inner cavity of the inner cylinder (310) through the fourth pipe (210).

4. The geogas survey 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. The geogas survey device for mineral exploration according to claim 4, wherein: 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. The geogas survey 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. The geogas survey device for mineral exploration according to claim 6, characterized in that: The transmission assembly (360) comprises a rotating rod (361), the rotating rod (361) being rotatably arranged on the filter drying tank (110), the rotating rod (361) being provided with a first transmission plate (362), two second transmission plates (363) being symmetrically slidably arranged on the first transmission plate (362), the two second transmission plates (363) being respectively movably hinged to the first connecting plate (351) and the second connecting plate (353) via hinge shafts.

8. The geogas survey 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 survey device for mineral exploration according to claim 8, characterized in that: The limiting component (370) includes a ratchet wheel (371) provided on the rotating rod (361); A third connecting plate (372) is provided on the overflow valve core (272), a mounting disc (373) is provided on the third connecting plate (372), a ratchet pawl (374) is provided on the mounting disc (373), and the ratchet pawl (374) is adapted to the ratchet wheel (371).

10. A geogas measurement device for mineral exploration according to claim 1, characterized in that: A plurality of elastic membranes (390) are circumferentially arranged on the inner circumference of the circular chute (330), and a complete circular surface is formed by the plurality of elastic membranes (390).

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