Soil gas sampling device for geological mineral exploration

Abstract

The utility model relates to the technical field of gas sampling devices, in particular to a soil gas sampling device for geological mineral exploration, which comprises an operating handle, a control device, a sampling component and a gas collecting component, the lower end of the operating handle is fixedly connected with the control device, and the inner side of the lower end of the control device is fixedly connected with a driving component. The bottom end of the control equipment is fixedly connected with a sampling assembly, the outer side of the driving assembly is mounted on the outer side of the gas collecting assembly, the driving assembly comprises a limiting telescopic rod, the bottom end of the limiting telescopic rod is fixedly connected with a built-in cylinder, the outer side of the built-in cylinder is fixedly connected with a first rubber sealing ring, and the top end of the built-in cylinder is fixedly connected with a threaded rod; according to the device disclosed by the utility model, a collection mechanism is innovated, vacuumizing is not needed, the sampling process is simplified, the cost is reduced, background gas pollution is avoided, and the detection accuracy and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling devices, in particular to a soil gas sampling device for geological and mineral exploration. Background Art

[0002] Soil gas sampling can detect the presence, composition and distribution of volatile organic compounds in the soil, thereby identifying pollution sources such as leaks from underground petroleum or organic solvent storage tanks, which is important for assessing the degree and risk of site contamination;

[0003] The soil gas sampling device for geological and mineral exploration is a device used to collect gas samples in the soil. It is mainly used in the fields of geological exploration, environmental pollution monitoring and mineral resource assessment. It can effectively identify underground pollutant leakage, assess the degree of volatile organic pollution, and monitor the migration of soil gas. This device also has the advantage of in-situ sampling, which can reduce sample cross-contamination and improve the accuracy and efficiency of detection.

[0004] Existing soil gas collection devices usually use glass sampling bottles to collect the collected gas. However, there will be a certain amount of gas inside the glass sampling bottle, which may dilute or contaminate the collected soil gas, thereby affecting the accuracy of the test results. In order to improve the accuracy of the test, it is usually necessary to vacuum the sampling bottle before collecting the gas. Although this pretreatment step can effectively reduce the interference of the gas, it also increases the complexity and cost of the sampling process. Therefore, in view of the above problems, a soil gas sampling device for geological and mineral exploration is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a soil gas sampling device for geological and mineral exploration to solve the problem that when using a sampling bottle made of glass, the sampling bottle usually needs to be vacuumed before collecting gas. Although this pretreatment step can effectively reduce interference from gas, it also increases the complexity and cost of the sampling process.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A soil gas sampling device for geological and mineral exploration comprises an operating handle, a control device, a sampling assembly and a gas collecting assembly, wherein the lower end of the operating handle is fixedly connected to the control device, the inner side of the lower end of the control device is fixedly connected to the driving assembly, the bottom end of the control device is fixedly connected to the sampling assembly, the outer side of the driving assembly is installed on the outer side of the gas collecting assembly, the driving assembly comprises a limiting telescopic rod, the bottom end of the limiting telescopic rod is fixedly connected to an internal cylinder, the outer side of the internal cylinder is fixedly connected to a first rubber sealing ring, the top end of the internal cylinder is fixedly connected to an internal threaded cylinder, the inner side of the internal threaded cylinder is fixedly connected to the internal threaded cylinder, and the inner side of the internal threaded cylinder is fixedly connected to the sampling assembly. A threaded rod is spirally connected, and the top of the threaded rod is fixedly connected to the end of the main shaft of the servo motor. A threaded hole is opened on the inner side of the inner tube, and a second rubber sealing ring is fixedly connected to the side of the inner tube close to the lower end. The gas collection assembly includes a metal outer screw barrel, and a silicone duckbill valve is fixedly connected to the top of the metal outer screw barrel, and an air storage airbag is fixedly connected to the top of the silicone duckbill valve. The outer side of the metal outer screw barrel is spirally installed on the inner side of the threaded hole opened in the inner tube, and the bottom end of the metal outer screw barrel is tightly attached to the upper end of the second rubber sealing ring. The casing of the servo motor is fixedly connected to the inner side of the control device.

[0008] As further optimization content of the present utility model, the sampling component includes a pedal, a cone cylinder is fixedly connected to the inner side of the pedal, an air intake hole is opened on the inner side of the cone cylinder, a spring reset one-way valve is fixedly connected to the inner side of the air intake hole opened in the cone cylinder, an air storage tank is opened on the inner side of the cone cylinder, the air intake hole passes through the inner side of the cone cylinder, and the air intake hole is connected to the air storage tank.

[0009] As further optimized content of the present invention, the top of the air storage airbag is fixedly connected to an air intake nozzle, the inner side of the air intake nozzle is fixedly connected to a third rubber sealing ring, an inner cone groove block and a bracket, the top of the bracket is fixedly connected to a spring telescopic rod, and the top of the spring telescopic rod is fixedly connected to a rubber plate.

[0010] As a further optimization of the present invention, a groove is provided at the lower end of the control device, the top end of the limit telescopic rod is fixedly connected to one side of the groove of the control device, and the bottom end of the control device is fixedly connected to the top end of the pedal.

[0011] As a further optimization of the present invention, the outer side of the first rubber sealing ring fits with the inner side of the air storage tank opened by the conical cylinder, the inner cylinder is embedded in the inner side of the air storage tank opened by the pedal, the clearance between the inner cylinder and the pedal is matched, and the limiting telescopic rod and the internal threaded cylinder are embedded in the inner side of the air storage tank.

[0012] As further optimization content of the present invention, the inner side of the metal outer screw barrel is hollow, a threaded strip is installed on the outer side of the metal outer screw barrel, gaps are provided on the inner sides of the silicone duckbill valve and the air storage airbag, a gap is provided on the inner side of the air storage airbag near the air extraction nozzle, and one third of the upper end of the metal outer screw barrel protrudes from the upper end of the limiting telescopic rod.

[0013] As a further optimization of the present invention, the inner side of the air intake nozzle is hollow, the upper and lower parts of the inner cone groove block are through structures, and the top end of the rubber plate is fitted with the bottom end of the inner cone groove block.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, by setting up a driving component, a sampling component and a gas collection component, the device uses an innovative collection mechanism, which eliminates the need to vacuum the sampling bottle, reduces the pretreatment steps before sampling, simplifies the sampling process, and reduces the sampling cost and complexity. At the same time, the device can effectively avoid the dilution or contamination of the collected sample by the background gas, ensure the purity of the collected gas, and thus significantly improve the accuracy and reliability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall explosion structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the cutaway structure of the cone cylinder of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the servo motor of the utility model;

[0020] Figure 5 This is a schematic diagram of the cutaway structure of the internal cylinder of the utility model;

[0021] Figure 6 For this utility model Figure 5 A schematic diagram of the structure at A;

[0022] Figure 7 It is a schematic diagram of the cutaway structure of the air storage airbag of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the silicone duckbill valve of the utility model;

[0024] Fig. 9 It is a schematic diagram of the cutaway structure of the air intake nozzle of the utility model.

[0025] In the figure: 1. Operating handle; 2. Control device;

[0026] 3. Driving assembly; 31. Position-limiting telescopic rod; 32. Built-in cylinder; 33. First rubber sealing ring; 34. Internal threaded cylinder; 35. Threaded rod; 36. Servo motor; 37. Threaded hole; 38. Second rubber sealing ring;

[0027] 4. Sampling assembly; 41. Pedal; 42. Cone; 43. Air inlet hole; 44. Spring return check valve; 45. Air storage tank;

[0028] 5. Gas collecting assembly; 51. Metal outer screw barrel; 52. Silicone duckbill valve; 53. Air storage bag; 54. Air extraction nozzle; 55. Third rubber sealing ring; 56. Inner cone groove block; 57. Bracket; 58. Spring telescopic rod; 59. Rubber sheet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] See also Figure 1-9 , the utility model provides a technical solution:

[0032] A soil gas sampling device for geological and mineral exploration, comprising an operating handle 1, a control device 2, a sampling assembly 4 and a gas collecting assembly 5, wherein the lower end of the operating handle 1 is fixedly connected to the control device 2, the inner side of the lower end of the control device 2 is fixedly connected to the driving assembly 3, the bottom end of the control device 2 is fixedly connected to the sampling assembly 4, the outer side of the driving assembly 3 is installed on the outer side of the gas collecting assembly 5, the driving assembly 3 comprises a limiting telescopic rod 31, the bottom end of the limiting telescopic rod 31 is fixedly connected to an internal cylinder 32, the outer side of the internal cylinder 32 is fixedly connected to a first rubber sealing ring 33, the top end of the internal cylinder 32 is fixedly connected to an internal threaded cylinder 34, the inner side of the internal threaded cylinder 34 is spirally connected There is a threaded rod 35, the top of which is fixedly connected to the end of the main shaft of the servo motor 36. A threaded hole 37 is provided on the inner side of the inner tube 32. A second rubber sealing ring 38 is fixedly connected to the side of the inner tube 32 near the lower end. The gas collection component 5 includes a metal outer screw barrel 51. A silicone duckbill valve 52 is fixedly connected to the top of the metal outer screw barrel 51. A gas storage airbag 53 is fixedly connected to the top of the silicone duckbill valve 52. The outer side of the metal outer screw barrel 51 is spirally installed on the inner side of the threaded hole 37 provided in the inner tube 32. The bottom end of the metal outer screw barrel 51 is tightly attached to the upper end of the second rubber sealing ring 38. The casing of the servo motor 36 is fixedly connected to the inner side of the control device 2.

[0033] As a further implementation of the present scheme, the sampling assembly 4 includes a pedal 41, a cone 42 is fixedly connected to the inner side of the pedal 41, an air intake hole 43 is provided on the inner side of the cone 42, a spring reset check valve 44 is fixedly connected to the inner side of the air intake hole 43 provided on the cone 42, an air storage tank 45 is provided on the inner side of the cone 42, the air intake hole 43 runs through the inner side of the cone 42, and the air intake hole 43 is connected to the air storage tank 45. Through the above arrangement, the convenience of inserting the cone 42 into the soil is improved. At the same time, through the arrangement of the spring reset check valve 44, the gas can only enter the inside of the air storage tank 45 from the outside, and cannot flow out from the inside of the air storage tank 45, thereby improving the convenience of gas collection in the later stage;

[0034] As a further implementation of this solution, the top of the gas storage airbag 53 is fixedly connected with a gas extraction nozzle 54, the inner side of the gas extraction nozzle 54 is fixedly connected with a third rubber sealing ring 55, an inner cone groove block 56 and a bracket 57, the top of the bracket 57 is fixedly connected with a spring telescopic rod 58, and the top of the spring telescopic rod 58 is fixedly connected with a rubber plate 59. Through the above arrangement, the collected gas can be taken out, and this extraction method greatly reduces the phenomenon of doping of the collected gas;

[0035] As a further implementation of this solution, a groove is provided at the lower end of the control device 2, the top end of the limit telescopic rod 31 is fixedly connected to one side of the groove of the control device 2, and the bottom end of the control device 2 is fixedly connected to the top end of the pedal 41. Through the above arrangement, a controller is arranged inside the control device 2 to control the start and stop of the servo motor 36;

[0036] As a further implementation of this solution, the outer side of the first rubber sealing ring 33 is fitted with the inner side of the gas storage tank 45 opened by the cone 42, the built-in tube 32 is embedded and installed in the inner side of the gas storage tank 45 opened by the stepping pedal 41, the clearance between the built-in tube 32 and the stepping pedal 41 is matched, and the limiting telescopic rod 31 and the internal threaded tube 34 are embedded and installed in the inner side of the gas storage tank 45. Through the above arrangement, the built-in tube 32 can be controlled to move inside the cone 42, so that negative pressure is generated inside the gas storage tank 45, so as to achieve the effect of collecting gas inside the soil, and at the same time, the gas inside the gas storage tank 45 can enter the inside of the gas storage airbag 53 by pressure to achieve the work of gas collection;

[0037] As a further implementation scheme of the present scheme, the inner side of the metal outer screw barrel 51 is hollow, and a threaded strip is installed on the outer side of the metal outer screw barrel 51. Gaps are opened on the inner sides of the silicone duckbill valve 52 and the air storage airbag 53, and a gap is opened on the inner side of the air storage airbag 53 near the air outlet nozzle 54. One-third of the upper end of the metal outer screw barrel 51 protrudes from the upper end of the limiting telescopic rod 31, and the inner side of the air outlet nozzle 54 is hollow. The upper and lower inner conical groove blocks 56 are through structures, and the top of the rubber plate 59 is in contact with the bottom of the inner conical groove block 56. Through the above-mentioned arrangement, the gas collection assembly 5 can be installed and removed, and the installed gas collection assembly 5 is sealed from the driving assembly 3, which is convenient for transferring the gas collection assembly 5 and removing the gas inside the gas collection assembly 5.

[0038] Working process: when collecting soil gas, first install the gas collection assembly 5 inside the driving assembly 3, then insert the cone head at the lower end of the cone 42 into the soil, and then press the pedal 41 to insert the cone 42 into the soil, align the metal outer screw 51 with the threaded hole 37 and rotate it, and install it inside the inner tube 32 through the threaded screw on the outer side of the metal outer screw 51. When the metal outer screw 51 rotates to a certain extent, the bottom end of the metal outer screw 51 is tightly attached to the upper end of the second rubber sealing ring 38, and the second rubber sealing ring 38 is used to seal the metal outer screw 51 and the inner tube 32. The servo motor 36 is started by the control operation button of the control device 2 to drive the threaded rod 35 to rotate. When the threaded rod 35 rotates, the internal threaded tube 34 and the built-in tube 32 are driven to move upward, and the limiting telescopic rod 31 is contracted. The first rubber sealing ring 33 plays a role in sealing between the built-in tube 32 and the cone tube 42. At this time, the built-in tube 32 drives the gas collection assembly 5 to move upward as a whole, and negative pressure is generated inside the cone tube 42. Under the pressure of the negative pressure, the silicone duckbill valves 52 are pressed against each other, and the gap inside the silicone duckbill valve 52 is in a close fit. The external air is very It is difficult to enter the interior of the air storage bag 53 from the air intake nozzle 54. During the upward movement of the built-in tube 32, the spring reset check valve 44 is opened due to external pressure, and the gas inside the soil enters the air storage tank 45 through the spring reset check valve 44. When the servo motor 36 is started, the threaded rod 35 flips, and the built-in tube 32 drives the gas collection assembly 5 to move downward as a whole. During the movement, the spring reset check valve 44 is closed due to pressure, and the gas inside the air storage tank 45 enters the metal outer screw tube 51. Under the action of pressure, the silicone duckbill valve 52 is deformed by the gas pressure, and the silicone The shape of the rubber duckbill valve 52 gradually narrows from bottom to top, so that the silicone duckbill valve 52 can restrict the flow direction of the gas through deformation. The gas inside the metal outer screw barrel 51 enters the inside of the air storage bag 53 through the silicone duckbill valve 52, and the air storage bag 53 gradually expands. The air storage bag 53 stores the gas. Under the action of the elastic force of the spring telescopic rod 58, the rubber plate 59 is tightly attached to the lower end of the inner cone groove block 56. The diameter of the lower end of the inner cone groove block 56 is half of the diameter of the rubber plate 59. The gas inside the air storage bag 53 will not flow out from the inside of the gas extraction nozzle 54, thereby achieving the effect of gas collection.

[0039] When taking out the collected gas, the sampling component 4 is removed from the soil, and the gas collecting component 5 is driven to move upward as a whole by the servo motor 36. At this time, the external air enters the gas storage tank 45 from the spring return one-way valve 44 again. When the gas collecting component 5 is in the groove of the control device 2, the silicone duckbill valve 52 is rotated to make the silicone duckbill valve 52 detach from the interior of the built-in tube 32. After the gas collecting component 5 is taken out as a whole, it is inserted into the interior of the gas extraction nozzle 54 through the external connecting tube. The third rubber sealing ring 55 seals the gas extraction nozzle 54 and the external connecting tube. The size of the third rubber sealing ring 55 is adjusted according to the size of the external connecting tube. When the external connecting tube pushes the rubber plate 59 away from the inner cone groove block 56, the gas collected in the gas storage airbag 53 is discharged through the external connecting tube, thereby achieving the effect of taking out the gas inside the gas storage airbag 53.

[0040] Based on the above principles, the device has changed the traditional gas collection method. There is no need to perform vacuum operation when collecting gas, which reduces the trouble during collection. At the same time, this collection method can ensure the purity of the gas and improve the accuracy of detection.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil gas sampling device for geological and mineral exploration, comprising an operating handle (1), a control device (2), a sampling component (4) and a gas collection component (5), characterized in that: The lower end of the operating handle (1) is fixedly connected to a control device (2), the inner side of the lower end of the control device (2) is fixedly connected to a drive component (3), the bottom end of the control device (2) is fixedly connected to a sampling component (4), and the outer side of the drive component (3) is installed on the outer side of a gas collection component (5); The driving assembly (3) comprises a limit telescopic rod (31), the bottom end of the limit telescopic rod (31) is fixedly connected to an internal cylinder (32), the outer side of the internal cylinder (32) is fixedly connected to a first rubber sealing ring (33), the top end of the internal cylinder (32) is fixedly connected to an internal threaded cylinder (34), the inner side of the internal threaded cylinder (34) is spirally connected to a threaded rod (35), the top end of the threaded rod (35) is fixedly connected to the end of the main shaft of the servo motor (36), the inner side of the internal cylinder (32) is provided with a threaded hole (37), and the side of the internal cylinder (32) close to the lower end is fixedly connected to a second rubber sealing ring (38), and the gas collection assembly (5) comprises a metal outer screw barrel (51), the top end of the metal outer screw barrel (51) is fixedly connected to a silicone duckbill valve (52), and the top end of the silicone duckbill valve (52) is fixedly connected to an air storage bag (53); The outer side of the metal outer screw barrel (51) is spirally mounted on the inner side of the threaded hole (37) opened in the inner barrel (32); the bottom end of the metal outer screw barrel (51) is tightly attached to the upper end of the second rubber sealing ring (38); and the housing of the servo motor (36) is fixedly connected to the inner side of the control device (2).

2. A soil gas sampling device for geological and mineral exploration according to claim 1, characterized in that: The sampling assembly (4) comprises a pedal (41), a cone (42) is fixedly connected to the inner side of the pedal (41), an air intake hole (43) is provided on the inner side of the cone (42), a spring return check valve (44) is fixedly connected to the inner side of the air intake hole (43) provided in the cone (42), an air storage tank (45) is provided on the inner side of the cone (42), the air intake hole (43) passes through the inner side of the cone (42), and the air intake hole (43) is in communication with the air storage tank (45).

3. The soil gas sampling device for geological and mineral exploration according to claim 1, characterized in that: The top end of the air storage bag (53) is fixedly connected to an air extraction nozzle (54); the inner side of the air extraction nozzle (54) is fixedly connected to a third rubber sealing ring (55), an inner cone groove block (56) and a bracket (57); the top end of the bracket (57) is fixedly connected to a spring telescopic rod (58); and the top end of the spring telescopic rod (58) is fixedly connected to a rubber plate (59).

4. The soil gas sampling device for geological and mineral exploration according to claim 1, characterized in that: The control device (2) has a groove at the lower end, the top end of the position-limiting telescopic rod (31) is fixedly connected to one side of the groove of the control device (2), and the bottom end of the control device (2) is fixedly connected to the top end of the pedal (41).

5. The soil gas sampling device for geological and mineral exploration according to claim 1, characterized in that: The outer side of the first rubber sealing ring (33) is fitted with the inner side of the air storage groove (45) opened by the conical cylinder (42); the inner cylinder (32) is embedded and installed in the inner side of the air storage groove (45) opened by the pedal (41); a clearance is fitted between the inner cylinder (32) and the pedal (41); and the position-limiting telescopic rod (31) and the internal threaded cylinder (34) are embedded and installed in the inner side of the air storage groove (45).

6. The soil gas sampling device for geological and mineral exploration according to claim 1, characterized in that: The inner side of the metal outer screw barrel (51) is hollow, and a threaded strip is installed on the outer side of the metal outer screw barrel (51). The inner sides of the silicone duckbill valve (52) and the air storage bag (53) are provided with slits, and the inner side of the air storage bag (53) near the air extraction nozzle (54) is provided with a slit. One third of the upper end of the metal outer screw barrel (51) protrudes from the upper end of the limiting telescopic rod (31).

7. The soil gas sampling device for geological and mineral exploration according to claim 3 is characterized in that: The inner side of the air extraction nozzle (54) is hollow, the inner conical groove block (56) is a through structure from top to bottom, and the top end of the rubber plate (59) is in contact with the bottom end of the inner conical groove block (56).

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