A device for soil gas sample capture

Abstract

The present application relates to mineral exploration, gas flux, ecological environment protection and monitoring technical field, especially a kind of device for soil gas sample trapping, including fixed seat, the surface two sides of the fixed seat are symmetrically fixedly connected with two supports, two The motor is fixedly connected between the support, the bottom surface of the motor is fixedly connected with rotating shaft, the inside central rotating plate of the fixed seat is rotatably connected, the rotating plate is fixedly connected with rotating shaft, the outer periphery of the rotating shaft is fixedly connected with fixed sleeve, the bottom surface of the fixed sleeve is fixedly connected with piston cylinder, the bottom surface of the piston cylinder is fixedly connected with columnar cylinder, by forming gas inlet and outlet passage in device interior can effectively control the flow direction of gas, improve the collection efficiency of soil gas, ensure that gas is effectively collected into device, improve the accuracy and reliability of collection, while dredging structure ensures continuity and reliability in gas collection process, reduces the error or uncertainty caused by unsmooth flow.

Description

Technical Field

[0001] This invention relates to the fields of mineral exploration, gas flux, ecological environment protection and monitoring, and in particular to a device for capturing soil gas samples. Background Technology

[0002] The concept of geothermal gas was proposed in 1982 by Kristiansson and Malmqvist of Sweden. In their research on the migration mechanism of Rn, they found significant contradictions with traditional diffusion migration theories. They proposed that Rn atoms must be brought to the Earth's surface through the continuous upward movement of another gas. Geothermal gas detection technology was first developed and used by the Swedish mining company Politeng in the mid-1980s. The detection device used was a plastic funnel with a 25cm diameter circular glass plate at the outlet, covered with an adsorption film. The device was buried 40-50cm underground, and after a period of time, the detector was retrieved. The elemental content on the film was analyzed using proton excitation. Continuous improvements, such as dynamic pumping devices, improved sampling efficiency, providing guidance for the improvement of this method and its wider application. In the late 1990s, Tong Chunhan et al. conducted the first domestic experiment on geothermal gas measurement of concealed gold deposits. Wu Zonghua, Liu Yinghan, and Wang Mingqi et al. respectively studied the characteristics of solid and liquid geothermal gas collection media, greatly improving collection efficiency.

[0003] For example, the integrated drilling and extraction ground gas sampler disclosed in CN105021429A includes a rod, a hammer pile, an air suction pipe, a steering device, an air nozzle, and a sealing device. During ground gas measurement, after the sampling hole is formed in the soil using the drill rod, the gas trap and the extraction cylinder can be directly connected for sampling without pulling out the rod. This avoids hole collapse and the mixing of atmospheric substances, ensuring the smooth progress of ground gas measurement work and improving the quality of work.

[0004] However, when used for soil gas detection, it often requires a long time to collect the gas, and the gas inside the gas collection device does not circulate. Since the gas in the soil evaporates and is released slowly, the gas collection efficiency is low. At the same time, the pores are often blocked by soil during the gas collection process, which also greatly affects the gas collection efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a device for capturing soil gas samples. This device can form a circulating ventilation path inside the device to increase the volatilization of gases in the soil, while also effectively clearing the parts in contact with the soil to improve the gas collection efficiency.

[0006] This invention adopts the following technical solution: a device for capturing soil gas samples, comprising a fixed base, two supports symmetrically fixedly connected to both sides of the fixed base, a motor fixedly connected between the two supports, a rotating shaft fixedly connected to the bottom surface of the motor, a rotating plate rotatably connected to the center inside the fixed base, the rotating plate being fixedly connected to the rotating shaft, a fixed sleeve fixedly connected to the outer periphery of the rotating shaft, a piston cylinder fixedly connected to the bottom surface of the fixed sleeve, a cylindrical cylinder fixedly connected to the bottom surface of the piston cylinder, a plurality of circumferentially arranged air inlets on the outer wall of the cylindrical cylinder, a spherical cylinder rotatably connected to the bottom surface of the cylindrical cylinder, the piston cylinder, the cylindrical cylinder, and the spherical cylinder being internally connected, and a [missing information - likely a design feature] being opened on the upper part of the outer wall of the spherical cylinder. The spherical cylinder has six circumferentially arranged drainage holes, and multiple circumferentially arranged air outlet holes are opened on the lower outer wall of the spherical cylinder. A piston plate is slidably connected inside the piston cylinder, and the piston plate is rotatably connected to the outer wall of the rotating shaft. Two fixed one-way valves are arranged in a circumferential array on the top surface of the piston plate. A worm gear is fixedly connected to the outer wall of the rotating shaft and below the piston plate. A sliding hinge is fixedly connected to the outer wall of the rotating shaft and at the bottom surface of the piston plate. Two first rotating rods are rotatably connected to two sides of the sliding hinge. Two second rotating rods are rotatably connected to the ends of the two first rotating rods away from the sliding hinge. A worm wheel is rotatably connected to the ends of the two second rotating rods away from the first rotating rods. The worm gear and the worm wheel are meshed together.

[0007] As a preferred embodiment of the present invention, a rotating shaft is rotatably connected inside the panel, and traction rods are rotatably connected to the other two sides of the sliding hinge. A sealing plate is rotatably connected to the end of the traction rod away from the sliding hinge. The sealing plate is in close contact with the inner wall of the cylindrical tube. The width of the sealing plate is greater than the diameter of the air inlet. Four symmetrically distributed trapezoidal grooves are opened inside the air inlet. Four trapezoidal blocks are fixedly connected to the outer wall of the sealing plate. The trapezoidal blocks fit into and are slidably connected to the trapezoidal grooves.

[0008] As a preferred embodiment of the present invention, a lower baffle is fixedly connected inside the spherical cylinder and below the unblocking hole. The middle part of the lower baffle is rotatably connected to the rotating shaft. Six second through holes arranged in a circumferential array are opened on the surface of the lower baffle. An upper baffle is rotatably connected to the top surface of the lower baffle. Three first through holes arranged in a circumferential array are opened on the surface of the upper baffle. The first through holes and the second through holes can overlap and communicate with each other. A rotating ring is fixedly connected to the top surface of the upper baffle. Twelve fixedly connected actuating blocks are arranged in a circumferential array on the surface of the rotating ring. An incomplete gear is fixedly connected to the outer wall of the rotating shaft and at the corresponding position of the rotating ring. A driven gear is meshed with one side of the incomplete gear. The driven gear is rotatably connected to the surface of the lower baffle. An actuating rod is fixedly connected to the surface of the driven gear.

[0009] As a preferred embodiment of the present invention, the bottom surface of the fixed base is arranged with four fixedly connected positioning pins in a circumferential array, the bottom surface of the spherical cylinder is fixedly connected with a cone head, and the outer wall of the cone head is arranged with three fixedly connected limiting blocks in a circumferential array.

[0010] As a preferred embodiment of the present invention, twelve fixedly connected base plates are arranged in a circumferential array on the outer wall of the upper baffle. A dredging structure is fixedly connected to the surface of the base plate. The dredging structure includes four first ejector rods symmetrically and rotatably connected to the surface of the base plate. Four second ejector rods are fixedly connected to the ends of the four first ejector rods away from the base plate. An ejector head is rotatably connected to the ends of the four second ejector rods away from the first ejector rods. A spring is fixedly connected to the inner side of the ejector head. The end of the spring away from the ejector head is fixedly connected to the surface of the base plate. The outer walls of the first and second ejector rods are coated. The base plate is located inside the dredging hole. The dredging structures on the outer walls of adjacent upper baffles are of different sizes, with the largest dredging structure being equal to the diameter of the dredging hole.

[0011] As a preferred embodiment of the present invention, the outer periphery of the fixed sleeve is provided with three curved arrayed sliding grooves, the top surface of the sliding grooves is fixedly connected to a fixed rod, the surface of the rotating plate is fixedly connected to a fixed frame, the inside of the fixed frame is placed with a rotating block, the side of the rotating block away from the motor is fixedly connected to a handle, the side of the rotating block away from the handle is provided with a through groove, the inside of the rotating block is rotatably connected to a rotating shaft, the fixed rod passes through the inside of the fixed sleeve, the fixed seat and the rotating plate and is located on the surface of the rotating plate, the middle part of the rotating shaft is fixedly connected to the top end of the fixed rod, the two sides of the rotating shaft are slidably connected to the inside of the fixed frame, and the top surface of the fixed frame is threadedly connected to a threaded rod.

[0012] As a preferred embodiment of the present invention, a first rotating connecting rod is rotatably connected to the end of the slide groove near the piston cylinder. A second rotating connecting rod is rotatably connected to the end of the first rotating connecting rod away from the slide groove. The end of the second rotating connecting rod away from the first rotating connecting rod is rotatably connected to the inside of the slide groove. A third rotating connecting rod is rotatably connected to the inside of the slide groove above the first rotating connecting rod. The middle part of the third rotating connecting rod is rotatably connected to the surface of the second rotating connecting rod. A fourth rotating connecting rod is rotatably connected to the end of the third rotating connecting rod away from the slide groove. The side of the fourth rotating connecting rod away from the third rotating connecting rod is rotatably connected to the inside of the slide groove. A fixing plate is fixedly connected to the end of the fourth rotating connecting rod away from the third rotating connecting rod. The fixing plate is slidably connected to the inside of the slide groove. A sealed outer cover is pasted on the outer walls of the first, second, third, and fourth rotating connecting rods. A vent hole arranged in a linear array is opened in the middle of the outer cover. A first air pipe is fixedly connected to the bottom surface of the outer cover. The end of the first air pipe away from the outer cover is fixedly connected to the top surface of the cylindrical cylinder. The outer cover, the first air pipe, and the cylindrical cylinder are connected in communication.

[0013] As a preferred embodiment of the present invention, torsion springs are symmetrically fixedly connected to both sides of the top surface of the inner wall of the piston cylinder, and cover plates are fixedly connected to both ends of the torsion springs. A second air pipe is provided inside the piston cylinder, the fixed sleeve, the rotating plate and the fixed seat. A three-way pipe is fixedly connected to the top surface of the second air pipe on the surface of the rotating plate. A vacuum pump is connected to the side of the three-way pipe, and an air bag is fixedly connected to the top surface of the three-way pipe.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. In this invention, the piston plate moves upward inside the piston cylinder, causing the air inlet to open. This allows gas from the soil to enter the piston cylinder through the air inlet for collection. Then, the piston plate moves downward inside the piston cylinder and the gas is discharged through the unblocking hole or the air outlet. This effectively controls the flow direction of the collected gas, ensuring that the gas enters through the air inlet and exits through the unblocking hole or the air outlet, avoiding mixing and leakage. It also improves the efficiency of soil collection, reduces interference from external environmental factors on gas collection, ensures that the gas is effectively collected into the gas bag, and makes the device more stable and reliable.

[0016] 2. This invention uses a dredging device to unclog the dredging holes, which can prevent mud from clogging the holes, ensure smooth gas discharge from the device, reduce the frequency of maintenance and cleaning, and enhance the ventilation effect. This helps to adsorb or collect the target gas into the device more quickly, improves the collection efficiency, ensures the continuity and reliability of the gas collection process, and reduces errors or uncertainties caused by poor flow.

[0017] 3. The present invention drives the outer cover to rotate by rotating the shaft, so that the first rotating rod, the second rotating rod, the third rotating rod and the fourth rotating rod scrape against the outer wall of the hole, which can accelerate the air flow inside the device and improve the air collection efficiency of the entire device. Attached Figure Description

[0018] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0021] Figure 3 This is the invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Figure 4 This is the invention Figure 1 Enlarged schematic diagram of the structure at point B.

[0023] Figure 5 This is the present invention. Figure 2 Schematic diagram of the cross-section of the structure at point CC.

[0024] Figure 6 This is the present invention. Figure 2 Schematic diagram of the cross-section of the structure at point DD.

[0025] Figure 7 This is a schematic diagram showing the detailed structure of the surface of the fixing sleeve of the present invention.

[0026] Figure 8 This is the present invention. Figure 5 Enlarged schematic diagram of the structure at point E in the middle.

[0027] Figure 9 This is a schematic diagram of the internal structure of the piston cylinder, cylindrical cylinder, and spherical cylinder of the present invention.

[0028] Figure 10 This is a schematic diagram of the internal structure of the piston cylinder, cylindrical cylinder, and spherical cylinder from another perspective of the present invention.

[0029] Figure 11 This is an exploded structural diagram of the rotating ring, upper baffle, and lower baffle of the present invention.

[0030] Figure 12 This is the present invention. Figure 5 Enlarged schematic diagram of the structure at point F.

[0031] In the diagram: 1. Fixed base; 2. Positioning pin; 3. Bracket; 4. Motor; 5. Rotating shaft; 6. Rotating plate; 7. Fixed sleeve; 8. Slide groove; 9. First rotating connecting rod; 10. Second rotating connecting rod; 11. Third rotating connecting rod; 12. Fourth rotating connecting rod; 13. Fixed plate; 14. Outer cover; 15. Vent hole; 16. Fixed rod; 17. Rotating block; 18. Rotating shaft; 19. Fixed frame; 20. Threaded rod; 21. Handle; 22. First air pipe; 23. Piston cylinder; 24. Cylindrical cylinder; 25. Air inlet; 26. Spherical cylinder; 27. Unblocking hole; 28. Air outlet; 29. ​​Piston plate; 30. One-way valve; 31. Sliding hinge seat; 2. Traction rod; 33. Sealing plate; 34. Trapezoidal groove; 35. Trapezoidal block; 36. Worm gear; 37. First rotating rod; 38. Second rotating rod; 39. Worm wheel; 40. Incomplete gear; 41. Driven gear; 42. Actuating rod; 43. Rotating ring; 44. Actuating block; 45. Upper baffle; 46. First through hole; 47. Lower baffle; 48. Second through hole; 49. Torsion spring; 50. Cover plate; 51. Second air pipe; 52. T-pipe; 53. Vacuum pump; 54. Airbag; 55. Base plate; 56. First ejector rod; 57. Second ejector rod; 58. Ejector head; 59. Coating; 60. Spring; 61. Cone head; 62. Limiting block. Detailed Implementation

[0032] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] See Figure 1-12A device for capturing soil gas samples includes a fixed base 1. Two supports 3 are symmetrically fixedly connected to both sides of the surface of the fixed base 1. A motor 4 is fixedly connected between the two supports 3. A rotating shaft 5 is fixedly connected to the bottom surface of the motor 4. A rotating plate 6 is rotatably connected to the center of the interior of the fixed base 1. The rotating plate 6 is fixedly connected to the rotating shaft 5. A fixed sleeve 7 is fixedly connected to the outer periphery of the rotating shaft 5. A piston cylinder 23 is fixedly connected to the bottom surface of the fixed sleeve 7. A cylindrical cylinder 24 is fixedly connected to the bottom surface of the piston cylinder 23. The outer wall of the cylindrical cylinder 24 has multiple circumferentially arranged air inlets 25. The bottom surface of the cylindrical cylinder 24 rotates... The spherical cylinder 26, piston cylinder 23, and cylindrical cylinder 24 are connected internally. Six circumferentially arranged drainage holes 27 are opened on the upper part of the outer wall of the spherical cylinder 26, and multiple circumferentially arranged air outlet holes 28 are opened on the lower part of the outer wall of the spherical cylinder 26. A piston plate 29 is slidably connected inside the piston cylinder 23, and the piston plate 29 is rotatably connected to the outer wall of the rotating shaft 5. Two fixedly connected one-way valves 30 are arranged in a circumferential array on the top surface of the piston plate 29. A worm gear 36 is fixedly connected to the outer wall of the rotating shaft 5 and below the piston plate 29. A sliding hinge seat 31 is fixedly connected. Two first rotating rods 37 are rotatably connected to two sides of the sliding hinge seat 31. Two second rotating rods 38 are rotatably connected to the ends of the two first rotating rods 37 away from the sliding hinge seat 31. Worm gears 39 are rotatably connected to the ends of the two second rotating rods 38 away from the first rotating rods 37. The worm 36 meshes with the worm gear 39. The fixed sleeve 7 is equipped with a sewage calcium sulfate desiccant to dry the gas in the air. Baffles can also be installed on the outside of the spherical cylinder 26, piston cylinder 23, cylindrical cylinder 24, and spherical cylinder 26 to prevent soil from falling in. When the air vent 25, the unblocking hole 27, and the air outlet 28 are blocked, the operator starts the motor 4, which synchronously drives the rotating shaft 5 to rotate, causing the worm 36 to rotate synchronously as well. Since the worm 36 and the worm wheel 39 are meshed together, every time the worm 36 rotates 24 times, the worm wheel 39 rotates 1 full rotation synchronously, thereby driving the second rotating rod 38 and the first rotating rod 37 to rotate. The sliding hinge 31 moves upward and then downward to reset, pushing the piston plate 29 to slide inside the piston cylinder 23, causing the piston plate 29 to slide back and forth inside the piston cylinder 23, increasing the airflow inside the device.

[0034] The sliding hinge 31 is rotatably connected to two other sides by traction rods 32. The end of the traction rod 32 away from the sliding hinge 31 is rotatably connected to a sealing plate 33. The sealing plate 33 is in close contact with the inner wall of the cylindrical tube 24. The width of the sealing plate 33 is greater than the diameter of the air inlet 25. The air inlet 25 has four symmetrically distributed trapezoidal grooves 34 inside. The outer wall of the sealing plate 33 is fixedly connected to four trapezoidal blocks 35. The trapezoidal blocks 35 fit into and slide with the trapezoidal grooves 34. During the upward movement of the sliding hinge 31, the sealing plate 33 and the trapezoidal blocks 35 slide upward inside the trapezoidal grooves 34 through the connection of the traction rods 32. This causes the sealing plate 33 to slide upward inside the cylindrical tube 24. At this time, the air inlet 25 is opened, and the gas outside the air inlet 25 can circulate inside the device through the air inlet 25.

[0035] Inside the spherical cylinder 26, below the unblocking hole 27, a lower baffle 47 is fixedly connected. The middle part of the lower baffle 47 is rotatably connected to the rotating shaft 5. The surface of the lower baffle 47 has six second through holes 48 arranged in a circumferential array. The top surface of the lower baffle 47 is rotatably connected to an upper baffle 45. The surface of the upper baffle 45 has three first through holes 46 arranged in a circumferential array. The first through holes 46 and the second through holes 48 can overlap and communicate with each other. The top surface of the upper baffle 45 is fixedly connected to a rotating ring 43. The surface of the rotating ring 43 has twelve fixedly connected actuating blocks 44 arranged in a circumferential array. The outer wall of the rotating shaft 5, at the corresponding position of the rotating ring 43, is fixedly connected to an incomplete gear 40. One side of the incomplete gear 40 is meshed with a driven gear 41. The driven gear 41 is rotatably connected to the surface of the lower baffle 47. A toggle lever 42 is fixedly connected. The starting motor 4 drives the rotating shaft 5 to rotate synchronously, causing the incomplete gear 40, which is fixedly connected to the rotating shaft 5, to also rotate synchronously. The incomplete gear 40 meshes with the driven gear 41. For every twelve rotations of the incomplete gear 40, the driven gear 41 rotates synchronously once, which in turn causes the toggle lever 42 to rotate one revolution. One revolution of the toggle lever 42 causes the aggle block 44 to vibrate once, that is, the rotating ring 43 rotates one-twelfth of a revolution. This synchronously drives the upper baffle 45 and the rotating ring 43 to rotate one-twelfth of a revolution. At this time, there is a one-half chance that the first through hole 46 and the second through hole 48 will be connected. If the first through hole 46 and the second through hole 48 are connected, the gas between the cylindrical tube 24 and the air inlet 25 can be transmitted, so that the air inlet and outlet inside the device form a passage, accelerating the collection and transmission of gas.

[0036] The bottom surface of the fixed base 1 is arranged with four fixedly connected positioning pins 2 in a circumferential array, and the bottom surface of the spherical cylinder 26 is fixedly connected with a cone head 61. The outer wall of the cone head 61 is arranged with three fixedly connected limiting blocks 62 in a circumferential array. The device is positioned by the positioning pins 2, the cone head 61 and the limiting blocks 62 to prevent the device from tilting and affecting the gas collection.

[0037] The upper baffle 45 has twelve fixedly connected base plates 55 arranged in a circumferential array on its outer wall. A dredging structure is fixedly connected to the surface of each base plate 55. The dredging structure includes four first ejector rods 56 symmetrically rotatably connected to the surface of each base plate 55. Four second ejector rods 57 are fixedly connected to the ends of the four first ejector rods 56 away from the base plate 55. An ejector head 58 is rotatably connected to the ends of the four second ejector rods 57 away from the first ejector rods 56. A spring 60 is fixedly connected to the inner side of the ejector head 58. The end of the spring 60 away from the ejector head 58 is fixedly connected to the surface of the base plate 55. The outer walls of the first ejector rods 56 and second ejector rods 57 are coated with a coating 59. The base plate 55 is located inside the dredging hole 27. The adjacent outer wall of the upper baffle 45... The sizes of the unblocking structures vary, with the largest unblocking structure equal to the diameter of the unblocking hole 27. Initially, the spring 60 is compressed, and the entire unblocking structure is deflected at a certain angle to the unblocking hole 27. After the spring 60 pops out after passing the unblocking hole 27, due to the certain angle between the unblocking structure and the unblocking hole 27, the unblocking structure can continue to unblock the next unblocking hole 27 as it rotates with the upper baffle 45. During the rotation of the upper baffle 45 and the rotating ring 43, the unblocking structure also rotates synchronously on the inner wall of the spherical cylinder 26. Every time the rotating ring 43 rotates one-twelfth of a turn, the unblocking structure will unblock the unblocking hole 27 once, preventing the unblocking hole 27 from being blocked and reducing the efficiency of use.

[0038] The fixed sleeve 7 has three curved arrayed grooves 8 on its outer periphery. A fixed rod 16 is fixedly connected to the top surface of each groove 8. A fixed frame 19 is fixedly connected to the surface of the rotating plate 6. A rotating block 17 is placed inside the fixed frame 19. A handle 21 is fixedly connected to the side of the rotating block 17 away from the motor 4. A through groove is formed on the side of the rotating block 17 away from the handle 21. A rotating shaft 18 is rotatably connected inside the rotating block 17. The fixed rod 16 passes through the interior of the fixed sleeve 7, the fixed seat 1, and the rotating plate 6 and is located on the surface of the rotating plate 6. The middle part of the rotating shaft 18 is fixedly connected to the top end of the fixed rod 16. The two sides of the rotating shaft 18 are slidably connected inside the fixed frame 19. A threaded rod 20 is threadedly connected to the top surface of the fixed frame 19. When the first rotating connecting rod 9, the second rotating connecting rod 10, and the third rotating connecting rod 10 are not needed... When rod 11 and the fourth rotating connecting rod 12 contact the inner wall of the gas collection hole, the operator can first loosen the threaded rod 20 upwards, and then drive the rotating shafts 18 on both sides of the rotating block 17 to slide inside the fixed frame 19 by turning the handle 21, that is, the rotating block 17 rotates 90 degrees. At this time, the fixed rod 16 slides upwards, and the included angle between the first rotating connecting rod 9, the second rotating connecting rod 10, the third rotating connecting rod 11, and the fourth rotating connecting rod 12 increases. Then tighten the threaded rod 20. At this time, the first rotating connecting rod 9, the second rotating connecting rod 10, the third rotating connecting rod 11, and the fourth rotating connecting rod 12 do not contact the inner wall of the hole. When it is necessary for the first rotating connecting rod 9, the second rotating connecting rod 10, the third rotating connecting rod 11, and the fourth rotating connecting rod 12 to scrape the inner wall of the hole to accelerate air evaporation, the operator can operate in reverse. This device can be used according to the needs of different scenarios.

[0039] The slide groove 8 is rotatably connected to a first rotating connecting rod 9 at one end near the piston cylinder 23. A second rotating connecting rod 10 is rotatably connected to the end of the first rotating connecting rod 9 away from the slide groove 8. The end of the second rotating connecting rod 10 away from the first rotating connecting rod 9 is rotatably connected inside the slide groove 8. A third rotating connecting rod 11 is rotatably connected to the interior of the slide groove 8 above the first rotating connecting rod 9. The middle part of the third rotating connecting rod 11 is rotatably connected to the surface of the second rotating connecting rod 10. A fourth rotating connecting rod 12 is rotatably connected to the end of the third rotating connecting rod 11 away from the slide groove 8. The side of the fourth rotating connecting rod 12 away from the third rotating connecting rod 11 is rotatably connected to the interior of the slide groove 8. A fixing plate 13 is fixedly connected to the end of the fourth rotating connecting rod 12 away from the third rotating connecting rod 11. The fixing plate 13 is slidably connected inside the slide groove 8. The first rotating connecting rod 9 and the second rotating connecting rod 10 are also connected to the slide groove 8. The outer walls of the third rotating link 11 and the fourth rotating link 12 are covered with a sealed outer cover 14. The outer cover 14 has a linear array of ventilation holes 15 in the middle. The bottom surface of the outer cover 14 is fixedly connected to a first air pipe 22. The end of the first air pipe 22 away from the outer cover 14 is fixedly connected to the top surface of the cylindrical cylinder 24. The outer cover 14, the first air pipe 22 and the cylindrical cylinder 24 are connected. The rotation of the motor 4 synchronously drives the rotating shaft 5, the fixed sleeve 7, the piston cylinder 23 and the cylindrical cylinder 24 to rotate. Therefore, the first rotating link 9, the second rotating link 10, the third rotating link 11 and the fourth rotating link 12 rotate around the rotating shaft 5. During the rotation, the connection point of the first rotating link 9, the second rotating link 10 and the third rotating link 11 and the fourth rotating link 12 scrapes the inner wall of the gas collection hole, which can increase the release of gas and accelerate the collection of gas.

[0040] The piston cylinder 23 has torsion springs 49 fixedly connected to both sides of the top surface of the inner wall. The two ends of the torsion springs 49 are fixedly connected to cover plates 50. The piston cylinder 23, the fixed sleeve 7, the rotating plate 6 and the fixed seat 1 are provided with a second air pipe 51. The surface of the rotating plate 6 is fixedly connected to the top surface of the second air pipe 51 with a three-way pipe 52. The side of the three-way pipe 52 is connected to a vacuum pump 53. The top surface of the three-way pipe 52 is fixedly connected to an air bag 54. In the initial state, the torsion springs 49 are under force, and the cover plate 50 blocks the second air pipe 51. When the operator uses the device to collect gas, the vacuum pump 53 needs to be turned on to create a vacuum or low-pressure environment. After the cover plate 50 is opened by force, the gas enters the second air pipe 51 and then enters the air bag 54 through the three-way pipe 52 to prevent the collected gas from leaking.

[0041] The working principle and usage of this invention are explained in detail below: During use, the operator drills a deep hole in the surface of the soil to be collected, then places the device inside the hole. By pressing downwards, the positioning nail 2, cone 61, and limiting block 62 come into contact with the soil, fixing the device in place. Then, the outer wall of the deep hole can be scraped as needed to increase the activity of the gas inside, increasing gas release and volatilization. If scraping the outer wall of the deep hole is not required, the operator first loosens the threaded rod 20 upwards, then moves the handle 21 to drive the rotating shafts 18 on both sides of the rotating block 17 to slide inside the fixing frame 19, i.e., the rotating block 17 rotates ninety degrees. At this point, the fixed rod 16 slides upward, and the fixed plate 13 slides inside the slide groove 8. The included angle between the first rotating connecting rod 9, the second rotating connecting rod 10, the third rotating connecting rod 11, and the fourth rotating connecting rod 12 increases. At this point, the threaded rod 20 is tightened, so the first rotating connecting rod 9, the second rotating connecting rod 10, the third rotating connecting rod 11, and the fourth rotating connecting rod 12 do not contact the inner wall of the hole. The rotation of the rotating shaft 5 synchronously drives the outer cover 14 to rotate, and the generated gas can be transmitted to the interior of the columnar cylinder 24 through the vent hole 15. If it is necessary to scrape the outer wall of the hole, the reverse restoration can be performed. The gas in the soil is collected through the vent hole 15 and enters the interior of the columnar cylinder 24.

[0042] The operator starts the motor 4 and vacuum pump 53. The rotation of the motor 4 drives the rotating shaft 5 to rotate synchronously. The worm gear 36, fixedly connected to the outer wall of the rotating shaft 5, also rotates synchronously, causing the worm wheel 39 to rotate. The rotation of the second rotating rod 38 and the first rotating rod 37 causes the sliding hinge seat 31 to slide up and down on the outer wall of the rotating shaft 5. The piston plate 29 slides up and down inside the piston cylinder 23. In the initial state, the sealing plate 33 is tightly pressed against the air inlet 25 of the cylindrical cylinder 24. When the sliding hinge seat 31 moves upward, the traction rod 32 causes the sealing plate 33 to slide upward on the inner wall of the cylindrical cylinder 24, thereby opening the air inlet 25 and allowing air to enter through the air inlet 25. The rotation also synchronously drives the incomplete gear 40 to rotate. When the rotating shaft 5 rotates twelve times, the driven gear 41 follows the incomplete gear 40 to rotate one full rotation. At this time, the actuating rod 42 actuates one of the actuating blocks 44, causing the rotating ring 43 and the upper baffle 45 to rotate together one-twelfth of a rotation. Initially, the second through hole 48 and the first through hole 46 do not coincide. After the first through hole 46 rotates one-twelfth of a rotation, there is a one-in-four probability that the second through hole 48 and the first through hole 46 will not coincide. At the same time, after the upper baffle 45 rotates one-twelfth of a rotation, the unblocking structure unblocks the unblocking hole 27. Since the diameter of six unblocking structures is smaller than the diameter of the unblocking hole 27, the second through hole 48 and the first through hole 46 will not coincide. When holes 46 do not coincide, gas can be discharged through the unblocking hole 27. If the second through hole 48 and the first through hole 46 rotate to coincide, gas can be discharged through the vent hole 28. The piston plate 29 slides upward through the sliding hinge 31, and then gas enters through the inlet hole 25. The gas enters the interior of the piston plate 29 and piston cylinder 23 through the one-way valve 30. At this time, both the unblocking hole 27 and the vent hole 28 are sealed. The sliding hinge 31 continues to move upward, causing the torsion spring 49 to rotate inward, opening the passage of the second air pipe 51. Gas enters the interior of the airbag 54 through the three-way pipe 52. During this process, the unblocking structure unblocks the unblocking hole 27 once. The larger unblocking structure unblocks the unblocking hole. 27 is cleared. At this time, the clearing hole 27 is still sealed. Then, the piston plate 29 moves downward by the rotation of the rotating shaft 5, which continues to drive the rotating ring 43 and the upper baffle 45 to rotate. At this time, the first through hole 46 and the second through hole 48 do not coincide. The clearing structure clears the clearing hole 27 again. At this time, the smaller clearing structure clears the clearing hole 27. It can not only clear the clearing hole 27, but also allow air to be released through the clearing hole 27. After the sliding hinge seat 31 continues to move upward for one cycle, the sliding hinge seat 31 moves downward. At this time, the first through hole 46 and the second through hole 48 coincide. Air can be released through the vent hole 28. At this time, the clearing structure clears and seals the clearing hole 27.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for capturing soil gas samples, comprising a base (1), wherein two supports (3) are symmetrically fixedly connected to both sides of the surface of the base (1), and a motor (4) is fixedly connected between the two supports (3), characterized in that: A rotating shaft (5) is fixedly connected to the bottom surface of the motor (4). A rotating plate (6) is rotatably connected to the center of the fixed base (1). The rotating plate (6) is fixedly connected to the rotating shaft (5). A fixed sleeve (7) is fixedly connected to the outer periphery of the rotating shaft (5). A piston cylinder (23) is fixedly connected to the bottom surface of the fixed sleeve (7). A cylindrical cylinder (24) is fixedly connected to the bottom surface of the piston cylinder (23). A plurality of circumferentially arranged air inlets (25) are opened on the outer wall of the cylindrical cylinder (24). A spherical cylinder (26) is rotatably connected to the bottom surface of the cylindrical cylinder (24). The piston cylinder (23), the cylindrical cylinder (24), and the spherical cylinder (26) are internally connected. Six circumferentially arranged unblocking holes (27) are opened on the upper part of the outer wall of the spherical cylinder (26). A plurality of circumferentially arranged air outlet holes (28) are opened on the lower part of the outer wall of the spherical cylinder (26). The piston cylinder (23) is slidably connected to a piston plate (29), which is rotatably connected to the outer wall of the rotating shaft (5). Two fixedly connected one-way valves (30) are arranged in a circular array on the top surface of the piston plate (29). A worm gear (36) is fixedly connected to the outer wall of the rotating shaft (5) and below the piston plate (29). A sliding hinge seat (31) is fixedly connected to the outer wall of the rotating shaft (5) and the bottom surface of the piston plate (29). Two first rotating rods (37) are rotatably connected to two sides of the sliding hinge seat (31). Two second rotating rods (38) are rotatably connected to the ends of the two first rotating rods (37) away from the sliding hinge seat (31). A worm wheel (39) is rotatably connected to the ends of the two second rotating rods (38) away from the first rotating rods (37). The worm gear (36) and the worm wheel (39) are meshed together. The outer periphery of the fixed sleeve (7) is provided with three curved array grooves (8), the top surface of the grooves (8) is fixedly connected to a fixed rod (16), the surface of the rotating plate (6) is fixedly connected to a fixed frame (19), the inside of the fixed frame (19) is placed with a rotating block (17), the side of the rotating block (17) away from the motor (4) is fixedly connected to a handle (21), the side of the rotating block (17) away from the handle (21) is provided with a through groove, the inside of the rotating block (17) is rotatably connected to a rotating shaft (18), the fixed rod (16) passes through the inside of the fixed sleeve (7), the fixed seat (1) and the rotating plate (6) and is located on the surface of the rotating plate (6), the middle part of the rotating shaft (18) is fixedly connected to the top of the fixed rod (16), the two sides of the rotating shaft (18) are slidably connected to the inside of the fixed frame (19), and the top surface of the fixed frame (19) is threadedly connected to a threaded rod (20). The end of the slide groove (8) near the piston cylinder (23) is rotatably connected to a first rotating connecting rod (9). The end of the first rotating connecting rod (9) away from the slide groove (8) is rotatably connected to a second rotating connecting rod (10). The end of the second rotating connecting rod (10) away from the first rotating connecting rod (9) is rotatably connected to the inside of the slide groove (8). The inside of the slide groove (8) above the first rotating connecting rod (9) is rotatably connected to a third rotating connecting rod (11). The middle part of the third rotating connecting rod (11) is rotatably connected to the surface of the second rotating connecting rod (10). The end of the third rotating connecting rod (11) away from the slide groove (8) is rotatably connected to a fourth rotating connecting rod (12). The side of the fourth rotating connecting rod (12) away from the third rotating connecting rod (11) is rotatably connected to... Inside the slide groove (8), the fourth rotating link (12) is fixedly connected to a fixing plate (13) at one end away from the third rotating link (11). The fixing plate (13) is slidably connected inside the slide groove (8). The outer walls of the first rotating link (9), the second rotating link (10), the third rotating link (11) and the fourth rotating link (12) are covered with a sealed outer cover (14). The middle part of the outer cover (14) is provided with a linear array of ventilation holes (15). The bottom surface of the outer cover (14) is fixedly connected to a first air pipe (22). The end of the first air pipe (22) away from the outer cover (14) is fixedly connected to the top surface of the columnar cylinder (24). The outer cover (14), the first air pipe (22) and the columnar cylinder (24) are connected.

2. The device for capturing soil gas samples according to claim 1, characterized in that: The other two sides of the sliding hinge (31) are rotatably connected to a traction rod (32). The end of the traction rod (32) away from the sliding hinge (31) is rotatably connected to a sealing plate (33). The sealing plate (33) is in close contact with the inner wall of the cylindrical tube (24). The width of the sealing plate (33) is greater than the diameter of the air inlet (25). The air inlet (25) has four symmetrically distributed trapezoidal grooves (34) inside. The outer wall of the sealing plate (33) is fixedly connected to four trapezoidal blocks (35). The trapezoidal blocks (35) fit into and slide with the trapezoidal grooves (34).

3. The device for capturing soil gas samples according to claim 1, characterized in that: Inside the spherical cylinder (26) and below the unblocking hole (27), a lower baffle (47) is fixedly connected. The middle part of the lower baffle (47) is rotatably connected to the rotating shaft (5). The surface of the lower baffle (47) has six second through holes (48) arranged in a circumferential array. The top surface of the lower baffle (47) is rotatably connected to an upper baffle (45). The surface of the upper baffle (45) has three first through holes (46) arranged in a circumferential array. The first through holes (46) and the second through holes (48) can overlap each other to communicate. A rotating ring (43) is fixedly connected to the top surface of the upper baffle (45). Twelve fixedly connected actuating blocks (44) are arranged in a circular array on the surface of the rotating ring (43). An incomplete gear (40) is fixedly connected to the outer wall of the rotating shaft (5) at the corresponding position of the rotating ring (43). A driven gear (41) is meshed on one side of the incomplete gear (40). The driven gear (41) is rotatably connected to the surface of the lower baffle (47). An actuating rod (42) is fixedly connected to the surface of the driven gear (41).

4. The device for capturing soil gas samples according to claim 1, characterized in that: The bottom surface of the fixed base (1) is arranged with four fixedly connected positioning pins (2), the bottom surface of the spherical cylinder (26) is fixedly connected with a cone head (61), and the outer wall of the cone head (61) is arranged with three fixedly connected limiting blocks (62).

5. The device for capturing soil gas samples according to claim 3, characterized in that: The outer wall of the upper baffle (45) is arranged in a circumferential array with twelve fixedly connected base plates (55). The surface of the base plate (55) is fixedly connected with a dredging structure. The dredging structure includes four first ejector rods (56) symmetrically and rotatably connected to the surface of the base plate (55). The ends of the four first ejector rods (56) away from the base plate (55) are fixedly connected with four second ejector rods (57). The ends of the four second ejector rods (57) away from the first ejector rods (56) are rotatably connected with ejector heads (58). The inner side of the ejector head (58) is fixedly connected with a spring (60). The end of the spring (60) away from the ejector head (58) is fixedly connected to the surface of the base plate (55). The outer walls of the first ejector rods (56) and the second ejector rods (57) are covered with a coating (59). The base plate (55) is located inside the dredging hole (27). The dredging structures on the outer walls of adjacent upper baffles (45) are of different sizes. The largest dredging structure is equal to the diameter of the dredging hole (27).

6. The apparatus for capturing soil gas samples according to claim 1, characterized in that: Torsion springs (49) are symmetrically fixedly connected to both sides of the top surface of the inner wall of the piston cylinder (23). Cover plates (50) are fixedly connected to both ends of the torsion springs (49). A second air pipe (51) is provided inside the piston cylinder (23), the fixed sleeve (7), the rotating plate (6) and the fixed seat (1). A three-way pipe (52) is fixedly connected to the top surface of the rotating plate (6) at the top surface of the second air pipe (51). A vacuum pump (53) is connected to the side of the three-way pipe (52). An air bag (54) is fixedly connected to the top surface of the three-way pipe (52).

Images