Device for trapping soil gas sample

Abstract

The invention relates to the technical field of mineral exploration, gas flux, ecological environment protection and monitoring and the like, in particular to a soil gas sample trapping device which comprises a fixing seat, two supports are symmetrically and fixedly connected to the two sides of the surface of the fixing seat, a motor is fixedly connected between the two supports, and the motor is connected with the fixing seat. A rotating shaft is fixedly connected to the bottom surface of the motor, a rotating plate is rotatably connected to the center of the interior of the fixing base and fixedly connected with the rotating shaft, a fixing sleeve is fixedly connected to the periphery of the rotating shaft, a piston cylinder is fixedly connected to the bottom surface of the fixing sleeve, and a columnar cylinder is fixedly connected to the bottom surface of the piston cylinder; the flow direction of gas can be effectively controlled by forming a gas inlet passage and a gas outlet passage in the device, the collection efficiency of soil gas is improved, it is ensured that the gas is effectively collected into the device, the collection accuracy and reliability are improved, meanwhile, the continuity and reliability in the gas collection process are ensured through a dredging structure, and the collection efficiency is improved. And errors or uncertainty caused by unsmooth flow can be reduced.

Description

Technical Field

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

[0002] The concept of ground gas was proposed by Kristiansson and Malmqvist (1982) of Sweden in 1982. When they studied the migration mechanism of Rn, they found that it was in great contradiction with the traditional diffusion migration theory. So they proposed that Rn atoms must be brought to the surface by the continuous upward movement of other gases. Ground gas detection technology was first developed and used by the Swedish Boliden Mining Company in the mid-1980s. The ground gas detection device used is a plastic funnel, with a 25cm diameter round glass sheet at the end of the outlet, and an adsorption film on it. The device is buried in a pit 40-50cm underground. After a period of time, the detector is retrieved and the element content on the film is analyzed by proton excitation. After continuous improvements, such as dynamic exhaust devices, the sampling efficiency has been improved, which has guiding significance for the improvement of the method and for more extensive experiments and applications. In the late 1990s, Tong Chunhan and others in China first carried out experiments on ground gas measurement of hidden gold mines. Wu Zonghua, Liu Yinghan, Wang Mingqi and others studied the characteristics of solid capture media and liquid capture agents of ground gas substances, which greatly improved the capture efficiency.

[0003] For example, the integrated drilling and pumping ground gas sampler with publication number CN105021429A includes a rod body, a hammer pile, an air suction pipe, a steering device, an air nozzle and a sealing device. When measuring ground gas, a sampling hole is formed in the soil by using a drill rod, and the gas capture device and the air pump can be directly connected to take samples without pulling out the rod body, thus avoiding the occurrence of hole collapse and the mixing of atmospheric substances, thereby ensuring the smooth progress of ground gas measurement and improving the work quality.

[0004] However, when using it in the process of soil gas detection, it often takes a long time to collect the gas, and the gas inside the gas collecting device does not circulate. Since the gas in the soil evaporates and releases slowly, the gas collection efficiency is low. At the same time, in the process of collecting gas, the pores are often blocked by soil, which greatly affects the gas collection efficiency. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a device for capturing soil gas samples, which can form a ventilation path inside the device to increase the volatilization of gas in the soil, and can also effectively dredge the part in contact with the soil to improve the efficiency of gas collection.

[0006] The present invention adopts the following technical scheme: a device for capturing soil gas samples, comprising a fixed seat, two brackets are symmetrically fixedly connected to the surface of the fixed seat on both sides, a motor is fixedly connected between the two brackets, a rotating shaft is fixedly connected to the bottom surface of the motor, a rotating plate is rotatably connected to the center of the fixed seat, the rotating plate is fixedly connected to the rotating shaft, a fixed sleeve is fixedly connected to the outer periphery of the rotating shaft, a piston cylinder is fixedly connected to the bottom surface of the fixed sleeve, a columnar cylinder is fixedly connected to the bottom surface of the piston cylinder, a plurality of air inlet holes arranged in a circumferential array are opened on the outer wall of the columnar cylinder, a spherical cylinder is rotatably connected to the bottom surface of the columnar cylinder, the piston cylinder, the columnar cylinder and the spherical cylinder are connected to each other, and a There are six dredging holes arranged in a circular array, and a plurality of air outlet holes arranged in a circular array are provided below the outer wall of the spherical cylinder. A piston plate is slidably connected to the inside of the piston cylinder, and the piston plate is rotatably connected to the outer wall of the rotating shaft. Two fixedly connected one-way valves are arranged in a circular array on the top surface of the piston plate. A worm is fixedly connected to the outer wall of the rotating shaft and located below the piston plate, and a sliding hinge seat is fixedly connected to the outer wall of the rotating shaft and located on the bottom surface of the piston plate. Two side surfaces of the sliding hinge seat are rotatably connected to two first rotating rods, and two second rotating rods are rotatably connected to one end of the two first rotating rods away from the sliding hinge seat, and two second rotating rods are rotatably connected to one end of the two second rotating rods away from the first rotating rods, and the worm is meshingly connected to the worm wheel.

[0007] As a preferred technical solution of the present invention, the panel is rotatably connected to a rotating shaft inside, the other two side surfaces of the sliding hinge are rotatably connected to traction rods, the end of the traction rod away from the sliding hinge is rotatably connected to a sealing plate, the sealing plate is tightly attached to the inner wall of the columnar 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, and four trapezoidal blocks are fixedly connected to the outer wall of the sealing plate, and the trapezoidal blocks fit into the trapezoidal grooves and are slidably connected.

[0008] As a preferred technical solution of the present invention, a lower baffle is fixedly connected to the inside of the spherical cylinder and below the dredging hole, the middle part of the lower baffle is rotatably connected to the rotating shaft, the surface of the lower baffle is provided with six second through holes arranged in a circular array, the top surface of the lower baffle is rotatably connected to an upper baffle, the surface of the upper baffle is provided with three first through holes arranged in a circular array, the first through holes and the second through holes can overlap with each other for communication, the top surface of the upper baffle is fixedly connected to a rotating ring, the surface of the rotating ring has twelve fixedly connected toggle blocks arranged in a circular array, the outer wall of the rotating shaft and located at the corresponding position of the rotating ring is fixedly connected to an incomplete gear, one side of the incomplete gear is meshed with a driven gear, the driven gear is rotatably connected to the surface of the lower baffle, and the surface of the driven gear is fixedly connected to a toggle rod.

[0009] As a preferred technical solution of the present invention, four fixedly connected positioning pins are arranged in a circular array on the bottom surface of the fixing seat, a cone head is fixedly connected to the bottom surface of the spherical cylinder, and three fixedly connected limit blocks are arranged in a circular array on the outer wall of the cone head.

[0010] As a preferred technical solution of the present invention, the outer wall of the upper baffle plate is arranged in a circular array with twelve fixedly connected base plates, the surface of the base plate is fixedly connected with a dredging structure, the dredging structure includes four first pop-up rods symmetrically rotatably connected to the surface of the base plate, the four first pop-up rods are fixedly connected to four second pop-up rods at one end away from the base plate, the four second pop-up rods are rotatably connected to one end away from the first pop-up rods, a spring is fixedly connected to the inner side of the pop-up head, one end of the spring away from the pop-up head is fixedly connected to the surface of the base plate, the outer walls of the first pop-up rod and the second pop-up rod are pasted with coatings, the base plate is located on the inner side of the dredging hole, the dredging structures of the adjacent outer walls of the upper baffle plate are different in size, and the largest dredging structure is equal to the diameter of the dredging hole.

[0011] As a preferred technical solution of the present invention, the outer periphery of the fixed sleeve is provided with three sliding grooves arranged in a curved array, the top surface of the sliding groove is fixedly connected to a fixing rod, the surface of the rotating plate is fixedly connected to a fixing frame, a rotating block is placed inside the fixing frame, a side of the rotating block away from the motor is fixedly connected to a handle, a side of the rotating block away from the handle is provided with a penetrating groove, a rotating shaft is rotatably connected inside the rotating block, the fixed rod penetrates the interior 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, both sides of the rotating shaft are slidably connected to the inside of the fixing frame, and the top surface of the fixing frame is threadedly connected to a threaded rod.

[0012] As a preferred technical solution of the present invention, the end of the slide groove close to the piston cylinder is rotatably connected to the first rotating connecting rod, the end of the first rotating connecting rod away from the slide groove is rotatably connected to the second rotating connecting rod, 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, the inside of the slide groove is located above the first rotating connecting rod and is rotatably connected to the third rotating connecting rod, the middle part of the third rotating connecting rod is rotatably connected to the surface of the second rotating connecting rod, the end of the third rotating connecting rod away from the slide groove is rotatably connected to the fourth rotating connecting rod, 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, the end of the fourth rotating connecting rod away from the third rotating connecting rod is fixedly connected to a fixing plate, and the fixing plate is slidably connected to the inside of the slide groove, the outer walls of the first rotating connecting rod, the second rotating connecting rod, the third rotating connecting rod and the fourth rotating connecting rod are pasted with a sealed outer cover, the middle part of the outer cover is provided with air vents arranged in a linear array, the bottom surface of the outer cover is fixedly connected to the first air pipe, the end of the first air pipe away from the outer cover is fixedly connected to the top surface of the cylindrical tube, and the outer cover, the first air pipe and the cylindrical tube are connected.

[0013] As a preferred technical solution of the present invention, torsion springs are symmetrically fixedly connected on both sides of the top surface of the inner wall of the piston cylinder, cover plates are fixedly connected at both ends of the torsion springs, a second connected air pipe is arranged inside the piston cylinder, the fixed sleeve, the rotating plate and the fixed seat, a three-way pipe is fixedly connected to the surface of the rotating plate located on the top surface of the second air pipe, 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 the present invention are:

[0015] 1. The piston plate of the present invention moves upward inside the piston cylinder, driving the air inlet to open, so that the gas in the soil enters the interior of the piston cylinder through the air inlet for gas collection, and then moves downward inside the piston cylinder through the piston plate to discharge gas through the dredging hole or the air outlet. This can effectively control the flow direction of the collected gas, ensure that the gas enters from the air inlet and is discharged from the dredging hole or the air outlet to avoid mixing and leakage. At the same time, it can also improve the efficiency of soil collection, reduce the interference of external environmental factors on gas collection, ensure that the gas is effectively collected into the air bag, and make the device more stable and reliable.

[0016] 2. The present invention dredges the dredging holes through the dredging device, which can prevent soil from clogging the dredging holes, ensure that the gas is discharged from the device smoothly, reduce the frequency of maintenance and cleaning, and enhance the ventilation effect, which helps to adsorb or collect the target gas into the device more quickly, improve the collection efficiency, ensure the continuity and reliability of the gas collection process, and reduce errors or uncertainties caused by poor flow.

[0017] 3. The present invention drives the outer cover to rotate by the rotating shaft, so that the first rotating rod, the second rotating rod, the third rotating rod and the fourth rotating rod scrape 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 2 It is a main structural schematic diagram of the present invention.

[0021] Figure 3 The present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0022] Figure 4 The present invention Figure 1 Enlarged schematic diagram of the structure at point B in the middle.

[0023] Figure 5 The present invention Figure 2 Schematic diagram of the structural cross-section at CC in the middle.

[0024] Figure 6 The present invention Figure 2 Schematic diagram of the structural cross-section at DD in the middle.

[0025] Figure 7 It is a detailed structural schematic diagram of the surface of the fixed sleeve of the present invention.

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

[0027] Fig. 9 It is a schematic diagram of the internal structure of the piston cylinder, the columnar cylinder and the spherical cylinder of the present invention.

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

[0029] Fig.11 It is a schematic diagram of the exploded structure of the rotating ring, the upper baffle and the lower baffle of the present invention.

[0030] Fig.12 The present invention Figure 5 Enlarged schematic diagram of the structure at F in the middle.

[0031] In the figure: 1, fixed seat; 2, positioning pin; 3, bracket; 4, motor; 5, rotating shaft; 6, rotating plate; 7, fixed sleeve; 8, slide groove; 9, first rotating link; 10, second rotating link; 11, third rotating link; 12, fourth rotating link; 13, fixed plate; 14, outer cover; 15, air vent; 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, columnar cylinder; 25, air inlet; 26, spherical cylinder; 27, dredging hole; 28, air outlet; 29, piston plate; 30, one-way valve; 31, sliding hinge seat; 3 2. traction rod; 33. sealing plate; 34. trapezoidal groove; 35. trapezoidal block; 36. worm; 37. first rotating rod; 38. second rotating rod; 39. worm wheel; 40. incomplete gear; 41. driven gear; 42. toggle rod; 43. rotating ring; 44. toggle 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. three-way pipe; 53. vacuum pump; 54. air bag; 55. bottom plate; 56. first ejection rod; 57. second ejection rod; 58. ejection head; 59. coating; 60. spring; 61. cone head; 62. limit block. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0033] See also Figure 1-12A device for capturing soil gas samples comprises a fixed seat 1, two brackets 3 are symmetrically fixedly connected on both sides of the surface of the fixed seat 1, a motor 4 is fixedly connected between the two brackets 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 fixed seat 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 columnar cylinder 24 is fixedly connected to the bottom surface of the piston cylinder 23, a plurality of air inlet holes 25 arranged in a circumferential array are opened on the outer wall of the columnar cylinder 24, and a rotating plate 6 is fixedly connected to the bottom surface of the rotating shaft 5. The piston cylinder 23 is movably connected with a spherical cylinder 26, the piston cylinder 23, the cylindrical cylinder 24 and the interior of the spherical cylinder 26 are connected, six dredging holes 27 arranged in a circumferential array are opened on the outer wall of the spherical cylinder 26, and a plurality of air outlet holes 28 arranged in a circumferential array are opened below the outer wall of the spherical cylinder 26. The piston cylinder 23 is slidably connected with a piston plate 29 inside, 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 36 is fixedly connected to the outer wall of the rotating shaft 5 and located below the piston plate 29. The outer wall of the rotating shaft 5 and the bottom surface of the piston plate 29 A sliding hinge seat 31 is fixedly connected, and two side surfaces of the sliding hinge seat 31 are rotatably connected to two first rotating rods 37. One end of the two first rotating rods 37 away from the sliding hinge seat 31 is rotatably connected to two second rotating rods 38. One end of the two second rotating rods 38 away from the first rotating rods 37 is rotatably connected to a worm gear 39. The worm 36 is meshed and connected with the worm gear 39. A sewage calcium sulfate desiccant is arranged inside the fixed sleeve 7 to dry the gas in the air. Baffles can also be arranged on the outer sides of the spherical cylinder 26, the piston cylinder 23, the columnar cylinder 24 and the spherical cylinder 26 to prevent soil from falling and making it difficult for the fixed sleeve 7 to dry the gas in the air. The air hole 25, the dredging hole 27 and the air outlet hole 28 are blocked, and the staff starts the motor 4 to synchronously drive the rotating shaft 5 to rotate, so that the worm 36 also rotates synchronously. Since the worm 36 and the worm wheel 39 are meshed and connected with each other, every time the worm 36 rotates twenty-four circles, the worm wheel 39 synchronously rotates a full circle, thereby driving the second rotating rod 38 and the first rotating rod 37 to rotate, and the sliding hinge seat 31 moves upward and then moves downward to reset, pushing the piston plate 29 to slide inside the piston cylinder 23, so that the piston plate 29 slides back and forth inside the piston cylinder 23, increasing the air flow inside the device.

[0034] Among them, the other two side surfaces of the sliding hinge seat 31 are rotatably connected with the traction rod 32, and the end of the traction rod 32 away from the sliding hinge seat 31 is rotatably connected with the sealing plate 33, the sealing plate 33 is close to the inner wall of the columnar tube 24, the width of the sealing plate 33 is greater than the diameter of the air inlet hole 25, and four symmetrically distributed trapezoidal grooves 34 are opened inside the air inlet hole 25, and the outer wall of the sealing plate 33 is fixedly connected with four trapezoidal blocks 35, and the trapezoidal blocks 35 are fitted with and slidably connected to the trapezoidal grooves 34. In the process of the upward movement of the sliding hinge seat 31, the sealing plate 33 and the trapezoidal blocks 35 slide upward inside the trapezoidal grooves 34 through the connection of the traction rod 32, and then the sealing plate 33 slides upward inside the columnar tube 24. At this time, the air inlet hole 25 is opened, and the gas outside the air inlet hole 25 can circulate inside the device through the air inlet hole 25.

[0035] Among them, a lower baffle plate 47 is fixedly connected to the inside of the spherical cylinder 26 and below the dredging hole 27, and the middle part of the lower baffle plate 47 is rotatably connected to the rotating shaft 5. The surface of the lower baffle plate 47 is provided with six second through holes 48 arranged in a circumferential array. The top surface of the lower baffle plate 47 is rotatably connected to the upper baffle plate 45, and the surface of the upper baffle plate 45 is provided with three first through holes 46 arranged in a circumferential array. The first through holes 46 and the second through holes 48 can overlap with each other for communication, and the top surface of the upper baffle plate 45 is fixedly connected to a rotating ring 43, and twelve fixedly connected toggle blocks 44 are arranged in a circumferential 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 and located at the corresponding position of the rotating ring 43. A driven gear 41 is meshed and connected to one side of the incomplete gear 40. The driven gear 41 is rotatably connected to the surface of the lower baffle plate 47. A toggle lever 42 is fixedly connected, and the rotating shaft 5 is driven to rotate synchronously by starting the motor 4, so that the incomplete gear 40 fixedly connected to the rotating shaft 5 also rotates synchronously. The incomplete gear 40 is meshed with the driven gear 41. The incomplete gear 40 rotates twelve times, driving the driven gear 41 to rotate synchronously by one circle, thereby also causing the toggle lever 42 to rotate one circle. The toggle lever 42 rotates one circle and the fluctuation toggle block 44 rotates once, that is, the rotating ring 43 rotates one twelfth of a circle, synchronously driving the upper baffle 45 and the rotating ring 43 to rotate one twelfth of a circle. At this time, the first through hole 46 and the second through hole 48 have a one-half chance of being connected. If the first through hole 46 is connected to the second through hole 48, the gas between the columnar tube 24 and the air inlet 25 can be transmitted, so that the air inlet and outlet inside the device form a passage, thereby accelerating the collection and transmission of the gas.

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

[0037] Among them, twelve fixedly connected bottom plates 55 are arranged in a circular array on the outer wall of the upper baffle plate 45, and a dredging structure is fixedly connected to the surface of the bottom plate 55. The dredging structure includes four first pop-up rods 56 symmetrically rotatably connected to the surface of the bottom plate 55, and the four first pop-up rods 56 are fixedly connected to one end away from the bottom plate 55 with four second pop-up rods 57, and the four second pop-up rods 57 are rotatably connected to one end away from the first pop-up rods 56 with a pop-up head 58, and the inner side of the pop-up head 58 is fixedly connected with a spring 60, and the end of the spring 60 away from the pop-up head 58 is fixedly connected to the surface of the bottom plate 55, and the outer walls of the first pop-up rod 56 and the second pop-up rod 57 are pasted with a coating 59. The bottom plate 55 is located on the inner side of the dredging hole 27, and the outer wall of the adjacent upper baffle plate 45 The dredging structures are of different sizes, the largest dredging structure is equal to the diameter of the dredging hole 27. In the initial state, the spring 60 is in a compressed state, and the entire dredging structure is deflected at a certain angle to the dredging hole 27. After the spring 60 pops out through the dredging hole 27, since there is a certain angle between the dredging structure and the dredging hole 27, the dredging structure can continue to dredge the next dredging hole 27 as it rotates with the upper baffle plate 45. During the rotation of the upper baffle plate 45 and the rotating ring 43, the dredging structure also rotates synchronously on the inner wall of the spherical cylinder 26. Every time the rotating ring 43 rotates one twelfth of a circle, the dredging structure will dredge the dredging hole 27 to prevent the dredging hole 27 from being blocked and reducing the use efficiency.

[0038] Among them, the outer periphery of the fixed sleeve 7 is provided with three sliding grooves 8 arranged in a curved array, the top surface of the sliding groove 8 is fixedly connected with a fixing rod 16, the surface of the rotating plate 6 is fixedly connected with a fixing frame 19, a rotating block 17 is placed inside the fixing frame 19, the side of the rotating block 17 away from the motor 4 is fixedly connected with a handle 21, the side of the rotating block 17 away from the handle 21 is provided with a through groove, the rotating block 17 is rotatably connected with a rotating shaft 18, the fixed rod 16 penetrates 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 of the fixed rod 16, the two sides of the rotating shaft 18 are slidably connected to the inside of the fixing frame 19, the top surface of the fixing frame 19 is threadedly connected with a threaded rod 20, and when the first rotating link 9, the second rotating link 10, and the third rotating link are not needed When the rod 11 and the fourth rotating link 12 contact the inner wall of the air collecting hole, the staff can first loosen the threaded rod 20 upwards, and then drive the rotating shaft 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 flips ninety degrees, and at this time drives the fixed rod 16 to slide upward, and the angle between the first rotating link 9, the second rotating link 10 and the third rotating link 11 and the fourth rotating link 12 increases, and then tighten the threaded rod 20. At this time, the first rotating link 9, the second rotating link 10, the third rotating link 11 and the fourth rotating link 12 do not contact the inner wall of the hole. When the first rotating link 9, the second rotating link 10, the third rotating link 11 and the fourth rotating link 12 are needed to scrape the inner wall of the hole to accelerate the volatilization of air, the staff can simply operate in reverse. This device can be used according to the needs of different scenarios.

[0039] Among them, the end of the slide groove 8 close to the piston cylinder 23 is rotatably connected to the first rotating link 9, the end of the first rotating link 9 away from the slide groove 8 is rotatably connected to the second rotating link 10, the end of the second rotating link 10 away from the first rotating link 9 is rotatably connected to the inside of the slide groove 8, the inside of the slide groove 8 is located above the first rotating link 9 and is rotatably connected to the third rotating link 11, the middle part of the third rotating link 11 is rotatably connected to the surface of the second rotating link 10, the end of the third rotating link 11 away from the slide groove 8 is rotatably connected to the fourth rotating link 12, the side of the fourth rotating link 12 away from the third rotating link 11 is rotatably connected to the inside of the slide groove 8, the end of the fourth rotating link 12 away from the third rotating link 11 is fixedly connected to the fixing plate 13, and the fixing plate 13 is slidably connected to the inside of the slide groove 8, the first rotating link 9, the second rotating link 10 The outer walls of the third rotating link 11 and the fourth rotating link 12 are pasted with a sealed outer cover 14, and the middle part of the outer cover 14 is provided with air holes 15 arranged in a linear array, and the bottom surface of the outer cover 14 is fixedly connected to a first air pipe 22, and the end of the first air pipe 22 away from the outer cover 14 is fixedly connected to the top surface of the cylindrical tube 24, and the outer cover 14, the first air pipe 22 and the cylindrical tube 24 are connected. Through the rotation of the motor 4, the rotating shaft 5, the fixed sleeve 7, the piston cylinder 23 and the cylindrical tube 24 are synchronously driven to rotate, so that 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 inner wall of the gas collecting hole is scraped through the connection points of the first rotating link 9, the second rotating link 10 and the third rotating link 11 and the fourth rotating link 12, which can increase the release of gas and accelerate the collection of gas.

[0040] Among them, torsion springs 49 are symmetrically fixedly connected on both sides of the top surface of the inner wall of the piston cylinder 23, and cover plates 50 are fixedly connected at both ends of the torsion spring 49. A second air pipe 51 is arranged inside the piston cylinder 23, the fixed sleeve 7, the rotating plate 6 and the fixed seat 1. The surface of the rotating plate 6 is located on the top surface of the second air pipe 51 and is fixedly connected with a three-way pipe 52. The side of the three-way pipe 52 is connected to a vacuum pump 53, and the top surface of the three-way pipe 52 is fixedly connected with an air bag 54. In the initial state, the torsion spring 49 is in a stressed state, and the cover plate 50 blocks the second air pipe 51 at this time. When the staff uses the device to collect gas, it is necessary to turn on the vacuum pump 53 to form a vacuum or low-pressure environment through the vacuum pump 53. After the cover plate 50 is opened under 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 specific working principle and method of use of the present invention are explained in detail below: When in use, the staff drills a deep hole on the surface of the soil to be collected, and then places the device inside the deep hole, and presses downward to make the positioning nail 2, the cone head 61 and the limit block 62 contact with the soil to fix the device, and then the outer wall of the deep hole can be scraped as needed, thereby increasing the activity of the gas in the deep hole and increasing the release and volatilization of the gas. If it is not necessary to scrape the outer wall of the deep hole, the staff needs to 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 fixing frame 19 by pulling the handle 21, that is, the rotating block 17 flips ninety degrees. Degrees, at this time, the fixing rod 16 is driven to slide upward, and the fixing plate 13 slides inside the slide groove 8, and the angles between the first rotating link 9 and the second rotating link 10, the third rotating link 11 and the fourth rotating link 12 are increased. At this time, the threaded rod 20 is tightened again, and the first rotating link 9, the second rotating link 10, the third rotating link 11 and the fourth rotating link 12 do not contact the inner wall of the hole, and the outer cover 14 is synchronously driven to rotate through the rotation of the rotating shaft 5. The generated gas can be transmitted to the inside of the columnar tube 24 through the air vent 15. If the outer wall of the hole needs to be scraped, the reverse recovery can be performed, and the gas in the soil is collected into the inside of the columnar tube 24 through the air vent 15.

[0042] The staff starts the motor 4 and the vacuum pump 53, and the rotation of the motor 4 drives the rotating shaft 5 to rotate synchronously. The worm 36 fixedly connected to the outer wall of the rotating shaft 5 also rotates synchronously, thereby causing the worm wheel 39 to rotate. The rotation of the second rotating rod 38 and the first rotating rod 37 drives the sliding hinge seat 31 to slide up and down on the outer wall of the rotating shaft 5, and the piston plate 29 slides up and down inside the piston cylinder 23. In the initial state, the sealing plate 33 is close to the air inlet 25 of the columnar cylinder 24. When the sliding hinge seat 31 moves upward, the sealing plate 33 slides upward on the inner wall of the columnar cylinder 24 through the action of the traction rod 32, thereby opening the air inlet 25, and air is taken in through the air inlet 25. The rotating shaft 5 The rotation also synchronously drives the incomplete gear 40 to rotate. When the rotating shaft 5 rotates twelve times, the driven gear 41 rotates one full circle following the incomplete gear 40. At this time, the toggle lever 42 toggles one of the toggle blocks 44, so that the rotating ring 43 and the upper baffle 45 rotate one twelfth of a circle together. In the initial state, the second through hole 48 does not overlap with the first through hole 46. When the first through hole 46 rotates one twelfth of a circle, there is a one-quarter probability that the second through hole 48 does not overlap with the first through hole 46. At the same time, after the upper baffle 45 rotates one twelfth of a circle, the dredging structure dredges the dredging hole 27. Since the diameters of six dredging structures are smaller than the diameters of the dredging hole 27, When the holes 46 do not overlap, the gas can be discharged through the dredging hole 27. If the second through hole 48 rotates to overlap with the first through hole 46, the gas can be discharged through the outlet hole 28, and the piston plate 29 is driven to slide upward through the sliding hinge seat 31, and then the gas is taken in through the inlet hole 25. The gas enters the interior of the piston plate 29 and the piston cylinder 23 through the one-way valve 30. At this time, the dredging hole 27 and the outlet hole 28 are both in a sealed state, and the sliding hinge seat 31 continues to move upward, so that the torsion spring 49 rotates inward, the channel of the second air pipe 51 is opened, and the gas enters the interior of the airbag 54 through the three-way pipe 52. In this process, the dredging structure dredges the dredging hole 27 once, and the larger dredging structure dredges the dredging hole 27 is dredged, at this time the dredging hole 27 is still in a sealed state, and then the piston plate 29 is moved downward by the rotation of the rotating shaft 5, and the rotating ring 43 and the upper baffle plate 45 are continued to rotate. At this time, the first through hole 46 and the second through hole 48 do not overlap, and the dredging structure dredges the dredging hole 27 again. At this time, the smaller dredging structure dredges the dredging hole 27, which can not only dredge the dredging hole 27, but also exhaust air through the dredging hole 27. After the sliding hinge seat 31 continues to move upward for a cycle, the sliding hinge seat 31 moves downward. At this time, the first through hole 46 and the second through hole 48 overlap, and air can be exhausted through the exhaust hole 28. At this time, the dredging structure dredges and seals the dredging hole 27.

[0043] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for capturing soil gas samples, comprising a fixing seat (1), two brackets (3) are symmetrically fixedly connected to the surface of the fixing seat (1), and a motor (4) is fixedly connected between the two brackets (3), characterized in that: The bottom surface of the motor (4) is fixedly connected to a rotating shaft (5), the center of the fixed seat (1) is rotatably connected to a rotating plate (6), the rotating plate (6) is fixedly connected to the rotating shaft (5), the outer periphery of the rotating shaft (5) is fixedly connected to a fixing sleeve (7), the bottom surface of the fixing sleeve (7) is fixedly connected to a piston cylinder (23), the bottom surface of the piston cylinder (23) is fixedly connected to a columnar cylinder (24), the outer wall of the columnar cylinder (24) is provided with a plurality of air inlet holes (25) arranged in a circumferential array, the bottom surface of the columnar cylinder (24) is rotatably connected to a spherical cylinder (26), the interiors of the piston cylinder (23), the columnar cylinder (24) and the spherical cylinder (26) are connected, the upper part of the outer wall of the spherical cylinder (26) is provided with six dredging holes (27) arranged in a circumferential array, and the lower part of the outer wall of the spherical cylinder (26) is provided with a plurality of air outlet holes (28) arranged in a circumferential array. ), the piston cylinder (23) is slidably connected to a piston plate (29) inside, the piston plate (29) is rotatably connected to the outer wall of the rotating shaft (5), the top surface of the piston plate (29) is provided with two fixedly connected one-way valves (30) arranged in a circular array, the outer wall of the rotating shaft (5) and located below the piston plate (29) is fixedly connected to a worm (36), the outer wall of the rotating shaft (5) and located below the piston plate (29) is fixedly connected to a sliding hinge seat (31), two side surfaces of the sliding hinge seat (31) are rotatably connected to two first rotating rods (37), the two first rotating rods (37) are rotatably connected to one end away from the sliding hinge seat (31) with two second rotating rods (38), the two second rotating rods (38) are rotatably connected to one end away from the first rotating rods (37) with a worm wheel (39), the worm (36) is meshingly connected to the worm wheel (39).

2. The device for capturing soil gas samples according to claim 1, characterized in that: The other two side surfaces of the sliding hinge seat (31) are rotatably connected to a traction rod (32), and one end of the traction rod (32) away from the sliding hinge seat (31) is rotatably connected to a sealing plate (33). The sealing plate (33) is closely attached to the inner wall of the columnar cylinder (24). The width of the sealing plate (33) is greater than the diameter of the air inlet hole (25). Four symmetrically distributed trapezoidal grooves (34) are provided inside the air inlet hole (25). Four trapezoidal blocks (35) are fixedly connected to the outer wall of the sealing plate (33). The trapezoidal blocks (35) fit in and are slidably connected to the trapezoidal grooves (34).

3. The device for capturing soil gas samples according to claim 1, characterized in that: A lower baffle (47) is fixedly connected inside the spherical cylinder (26) and below the dredging hole (27). The middle portion of the lower baffle (47) is rotatably connected to the rotating shaft (5). The surface of the lower baffle (47) is provided with 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) is provided with three first through holes (46) arranged in a circumferential array. The first through holes (46) and the second through holes (48) can overlap with each other to communicate. The top surface of the upper baffle (45) is fixedly connected to a rotating ring (43), and twelve fixedly connected toggle 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 a corresponding position of the rotating ring (43), and a driven gear (41) is meshedly connected to one side of the incomplete gear (40). The driven gear (41) is rotatably connected to the surface of the lower baffle (47), and a toggle 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 fixing seat (1) is provided with four fixedly connected positioning pins (2) arranged in a circular array, the bottom surface of the spherical cylinder (26) is provided with a cone head (61) fixedly connected, and the outer wall of the cone head (61) is provided with three fixedly connected limiting blocks (62) arranged in a circular array.

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

6. The device for capturing soil gas samples according to claim 1, characterized in that: The outer periphery of the fixed sleeve (7) is provided with three sliding grooves (8) arranged in a curved array, the top surface of the sliding groove (8) is fixedly connected to a fixed rod (16), the surface of the rotating plate (6) is fixedly connected to a fixed frame (19), a rotating block (17) is placed inside the fixed frame (19), a side of the rotating block (17) away from the motor (4) is fixedly connected to a handle (21), a side of the rotating block (17) away from the handle (21) is provided with a through groove, a rotating shaft (18) is rotatably connected inside the rotating block (17), the fixed rod (16) penetrates 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 to the interior of the fixed frame (19), and the top surface of the fixed frame (19) is threadedly connected to a threaded rod (20).

7. The device for capturing soil gas samples according to claim 6, characterized in that: The end of the slide groove (8) close to the piston cylinder (23) is rotatably connected to the first rotating link (9), the end of the first rotating link (9) away from the slide groove (8) is rotatably connected to the second rotating link (10), the end of the second rotating link (10) away from the first rotating link (9) is rotatably connected to the inside of the slide groove (8), the inside of the slide groove (8) is located above the first rotating link (9) and is rotatably connected to the third rotating link (11), the middle part of the third rotating link (11) is rotatably connected to the surface of the second rotating link (10), the end of the third rotating link (11) away from the slide groove (8) is rotatably connected to the fourth rotating link (12), and the side of the fourth rotating link (12) away from the third rotating link (11) is rotatably connected The fourth rotating link (12) is connected to the inside of the slide groove (8), and the end away from the third rotating link (11) is fixedly connected to a fixing plate (13). The fixing plate (13) is slidably connected to the inside of 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 pasted with a sealed outer cover (14). The middle part of the outer cover (14) is provided with air holes (15) arranged in a linear array. 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 tube (24). The outer cover (14), the first air pipe (22) and the columnar tube (24) are connected.

8. The device for capturing soil gas samples according to claim 1, characterized in that: Torsion springs (49) are symmetrically fixedly connected to the top surface of the inner wall of the piston cylinder (23) on both sides, and cover plates (50) are fixedly connected to the two ends of the torsion spring (49). A second air pipe (51) is connected to the inside of 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 second air pipe (51) on the surface of the rotating plate (6). A vacuum pump (53) is connected to the side of the three-way pipe (52), and an air bag (54) is fixedly connected to the top surface of the three-way pipe (52).

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