Sampling device and sampling method for micro-disturbance investigation of source area of ​​contaminated site

Abstract

The present invention provides a sampling device and a sampling method for micro-disturbance investigation of the source area of ​​a contaminated site. The sampling device and a sampling method for micro-disturbance investigation of the source area of ​​a contaminated site include a base, a drilling assembly, a second drive assembly, and an air extraction assembly. The first drive assembly drives the auger to rotate, and the second drive assembly drives the drilling assembly to move downward to start drilling a detection hole. After the drilling is completed, the second drive assembly drives the drilling assembly to reset. Then, the drive assembly drives the top cover to move downward to seal with the sheath. After that, the suction pump is started to start sampling, that is, one device can be used to complete the drilling and sampling operations, and no switching device is required, which is easier to achieve automation. The sampling method for micro-disturbance investigation of the source area of ​​a contaminated site provided by the present invention uses the above-mentioned sampling device for drilling and sampling, and no switching device is required, which is easier to achieve automation.

Description

Technical Field

[0001] The invention belongs to the technical field of pollution detection, and in particular relates to a micro-disturbance survey sampling device and a sampling method for a source area of ​​a polluted site. Background Art

[0002] Micro-disturbance technology is a general term for a type of safe, efficient, convenient, fast, high-precision, and low-cost chemical detection technology that has little damage to the ground and near-ground environment and basically no damage to the formation structure.

[0003] One of the micro-disturbance technologies is to comprehensively determine the pollution status of soil and groundwater by detecting multi-dimensional indicators related to pollutants and microbial metabolism in the surface soil shallower than 0.7 meters; specifically, it detects four types of indicators at a depth of shallower than 0.7 meters, including radon gas, volatile organic compounds (VOCs), metabolic gases (such as CO2, O2, CH4, H2, H2S, etc.), and functional genes (such as alkane monooxygenase AlkB gene, catechol dioxygenase C12O, C23O genes, etc.), to comprehensively interpret the distribution range of soil and groundwater pollutants.

[0004] Among them, when detecting gas-related indicators such as radon, volatile organic compounds and metabolic gases at a depth of less than 0.7m, it is necessary to drill a hole first and then use a suction pump to extract the gas for detection.

[0005] At present, it is usually necessary to first use a tool such as a steel chisel to drill a detection hole, and then use a gas extraction device to be placed on the detection hole to extract gas for detection; that is, two different devices are required for drilling and gas extraction. When operating, it is necessary to first use the drilling device to drill a hole, and then use the gas extraction device to extract gas for detection. The operation is cumbersome and difficult to achieve automated operation. Summary of the invention

[0006] The present invention provides a sampling device and a sampling method for micro-disturbance investigation of the source area of ​​a contaminated site, aiming to solve the technical problem that in the prior art, two different devices are required for drilling and gas extraction. During operation, it is necessary to first use a drilling device to drill a hole, and then use a gas extraction device to extract gas for detection, which is cumbersome to operate and difficult to achieve automated operation.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] In a first aspect, an embodiment of the present invention provides a device for sampling a source area of ​​a contaminated site using micro-disturbance survey, comprising:

[0009] A base, the upper side of which is provided with a vertically arranged guide sleeve, and the base is suitable for being fixed on the ground;

[0010] The drilling assembly comprises a sleeve, an auger rod, a mounting frame and a first driving assembly, wherein the sleeve is arranged in the guide sleeve and is slidably matched with the guide sleeve; the auger rod is arranged in the sleeve, and both upper and lower ends protrude from the sleeve; the mounting frame is arranged on the top of the sleeve and connected to the sleeve, and a soil discharge window is provided on the side of the mounting frame; the first driving assembly is connected to the mounting frame, and the power output end is connected to the auger rod;

[0011] A second driving assembly is connected to the base, and a power output end is connected to the sheath, and is used to drive the sheath to move up and down; and

[0012] The air extraction component includes a top cover, a third drive component and an air suction pump. The top cover is arranged on the upper side of the sleeve and is slidably matched with the rotating shaft seal of the spiral drill rod. The top cover is suitable for covering the top end of the sleeve and is sealed with the sleeve; the third drive component is connected to the mounting frame, and the power output end is connected to the top cover to drive the top cover to move up and down. The air inlet end of the air suction pump is connected to the top cover or the sleeve, and the air outlet end is used to connect with the detection equipment.

[0013] In combination with the first aspect, in a possible implementation of the polluted site source area micro-disturbance investigation sampling device provided by the present invention, a plurality of fixing rods are provided at the bottom of the base, and the fixing rods are suitable for being inserted into the ground.

[0014] In combination with the first aspect, in a possible implementation of the polluted site source area micro-disturbance survey sampling device provided by the present invention, the outer wall of the sheath is provided with a tooth row along the axial direction, and the second drive assembly includes:

[0015] a gear meshing with the gear row; and

[0016] The motor assembly is connected to the base, and a power output end is connected to the gear to drive the gear to rotate.

[0017] In combination with the first aspect, in a possible implementation of the micro-disturbance survey sampling device for a contaminated site source area provided by the present invention, the sheath is provided with a plurality of vent groups along the axial direction, each of the vent groups includes a plurality of first vents arranged around the sheath, and the first vents in the plurality of vent groups are aligned in the axial direction of the sheath; the sheath is provided with a plurality of slide grooves along the axial direction, the slide grooves correspond one-to-one to the first vents in the vent groups, and the first vents are provided at the bottom of the slide grooves;

[0018] The air extraction assembly also includes:

[0019] The gate plate comprises a connecting sleeve and a plurality of sliding plates, wherein the sliding plates correspond to the sliding grooves one by one, the sliding plates are slidably matched with the sliding grooves, the plurality of sliding plates are connected to the connecting sleeve, the sliding plates are provided with a plurality of third vent holes along the axis, and the plurality of the third vent holes correspond to the plurality of the first vent holes in the same axis direction one by one;

[0020] A fourth driving assembly is connected to the mounting frame or the jacket, and a power output end is connected to the connecting sleeve, and is used to drive the gate to slide up and down so that the third vent hole is aligned with or misaligned with the first vent hole;

[0021] A heat shrink sleeve, the heat shrink sleeve is arranged inside the sheath and fits with the inner wall of the sheath; and

[0022] The jet assembly is connected to the base and is suitable for being communicated with the first vent holes in the plurality of vent hole groups, and is used for jetting hot air between the heat shrink sleeve and the protective sleeve.

[0023] In combination with the first aspect, in a possible implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the present invention, the guide sleeve is provided with a plurality of second air holes along the circumference, and the jet assembly includes a plurality of jet nozzles, and the jet nozzles correspond one-to-one to the second air holes. The jet nozzles are arranged on the outside of the guide sleeve and connected to the second air holes, and the jet nozzles are suitable for being connected to the hot air source through a pipeline.

[0024] In combination with the first aspect, in a possible implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the present invention, a clamping groove is opened on the inner side of the bottom end of the sheath, and the gas extraction assembly also includes a clamping assembly, which is used to clamp the lower end of the heat shrink sleeve in the clamping groove.

[0025] In combination with the first aspect, in a possible implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the present invention, the clamping assembly includes a clamping ring and an airbag, the clamping ring is arranged in the clamping groove, the lower end of the heat shrinkable sleeve is clamped between the clamping ring and the sleeve, and the inner diameter of the clamping ring is greater than or equal to the inner diameter of the sleeve; the airbag is arranged on the side of the clamping ring facing the heat shrinkable sleeve, and is connected to the clamping ring to adjust the holding force; the airbag is provided with an air inlet valve.

[0026] In combination with the first aspect, in a possible implementation of the polluted site source area micro-disturbance survey sampling device provided by the present invention, an elastic rope is provided at the lower end of the heat shrinkable sleeve, and the elastic rope is connected to the heat shrinkable sleeve to drive the lower end of the heat shrinkable sleeve to shrink;

[0027] After the heat shrink sleeve, except for the part clamped in the clamping groove, is completely shrunk and adhered to the surface of the auger rod under the action of hot air, the first driving component drives the auger rod to rotate, and after the remaining part of the heat shrink sleeve is pulled out from the clamping groove, the elastic rope drives the heat shrink sleeve to shrink onto the auger rod, so that the upper and lower ends of the space between the heat shrink sleeve and the inner wall of the sheath are conductive.

[0028] In a second aspect, an embodiment of the present invention further provides a method for sampling a source area of ​​a contaminated site using a micro-disturbance survey, wherein the sampling device is used to take samples, and the method comprises the following steps:

[0029] S01, placing the sampling device at a location where a detection hole needs to be drilled;

[0030] S02, driving the auger rod to rotate by the first driving assembly, and then driving the casing to move downward by the second driving assembly, driving the auger rod to move downward together, and starting drilling; during the drilling process, soil moves upward along the casing and is discharged from the soil discharge window at the top of the casing;

[0031] S03, after drilling to a preset depth, controlling the auger rod to stop rotating; and driving the casing to move upward through the second driving assembly until the casing is reset;

[0032] S07, driving the top cover downward through the third driving assembly, covering the top of the sheath, starting the air pump, starting to extract the gas diffused from the detection hole, connecting the air outlet of the air pump to the detection equipment, and starting the detection.

[0033] In conjunction with the second aspect, in a possible implementation of the polluted site source area micro-disturbance survey sampling device provided by the present invention, between steps S03 and S07, the following steps are also included:

[0034] S04, during the upward movement of the sleeve, hot air is introduced into the air nozzle, the first air hole on the sleeve is aligned with the air nozzle from top to bottom, and each time the air nozzle is aligned with the first air hole, the sleeve stops for a preset time, hot air is introduced into the sleeve to shrink the heat shrink sleeve from top to bottom until the sleeve is reset, at which time, the heat shrink sleeve, except for the part clamped in the clamping groove, is completely shrunk and adhered to the surface of the auger rod under the action of the hot air;

[0035] S05, discharging the hot air in the sheath by active suction or passive diffusion;

[0036] S06, driving the auger rod to rotate a preset angle through the first driving component, pulling the remaining part of the heat shrink sleeve out of the clamping groove, and the elastic rope drives the heat shrink sleeve to shrink onto the auger rod, so that the upper and lower ends of the space between the heat shrink sleeve and the inner wall of the sheath are connected, so that the gas in the detection hole can pass through the space between the sheath and the heat shrink sleeve.

[0037] The beneficial effects of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the present invention are as follows: compared with the prior art, the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the present invention drives the spiral drill rod to rotate through the first driving component, and drives the punching component to move downward through the second driving component to start drilling the detection hole; after the drilling is completed, the second driving component drives the punching component to reset; then, the top cover is driven downward by the driving component to seal with the sheath, and then the suction pump is started to start sampling, that is, the drilling and sampling operations can be completed using one device, there is no need to switch devices, and automation is easier to achieve.

[0038] The beneficial effect of the micro-disturbance survey and sampling method for the source area of ​​a contaminated site provided by the present invention is that compared with the prior art, the micro-disturbance survey and sampling method for the source area of ​​a contaminated site provided by the present invention uses the above-mentioned sampling device for drilling and sampling, does not require a switching device, and is easier to realize automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the three-dimensional structure of a micro-disturbance survey sampling device for a contaminated site source area provided by an embodiment of the present invention;

[0040] Figure 2 A schematic cross-sectional view of a sampling device for micro-disturbance investigation of a source area of ​​a contaminated site provided by an embodiment of the present invention;

[0041] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0042] Figure 4 for Figure 2 A magnified view of part B in FIG.

[0043] Figure 5 for Figure 2 The enlarged view of the C part in FIG.

[0044] Description of reference numerals:

[0045] 10. base; 11. guide sleeve; 111. air nozzle; 112. second vent hole;

[0046] 12. fixing rod; 21. sheath; 211. tooth row; 212. first vent hole; 213. clamping groove;

[0047] 22. Mounting frame; 23. Auger rod; 24. First drive assembly; 31. Gear;

[0048] 32. Motor assembly; 40. Gate; 41. Connecting sleeve; 42. Slide plate; 421. Third vent hole;

[0049] 43. fourth driving assembly; 51. heat shrink sleeve; 52. elastic rope; 61. clamping ring; 62. air bag;

[0050] 71. Top cover; 72. Third driving assembly; 73. Air suction pump. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] 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.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0058] Please also read Figures 1 to 5, the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the present invention is now described. The micro-disturbance investigation and sampling device for the source area of ​​a contaminated site comprises a base 10, a drilling assembly, a second drive assembly and an air extraction assembly. A vertically arranged guide sleeve 11 is provided on the upper side of the base 10, and the base 10 is suitable for being fixed on the ground; the drilling assembly comprises a sleeve 21, an auger rod 23, a mounting frame 22 and a first drive assembly 24. The sleeve 21 is arranged in the guide sleeve 11 and is slidably matched with the guide sleeve 11; the auger rod 23 is arranged in the sleeve 21, and both the upper and lower ends protrude from the sleeve 21; the mounting frame 22 is arranged at the top of the sleeve 21 and is connected to the sleeve 21, and a soil discharge window is provided on the side of the mounting frame 22; the first drive assembly 24 is connected to the mounting frame 22, and the power transmission The output end is connected to the auger rod 23; the second drive assembly is connected to the base 10, and the power output end is connected to the sleeve 21, which is used to drive the sleeve 21 to move up and down; the air extraction assembly includes a top cover 71, a third drive assembly 72 and an air suction pump 73, the top cover 71 is arranged on the upper side of the sleeve 21, and is sealed and slidably matched with the rotating shaft of the auger rod 23, and the top cover 71 is suitable for covering the top end of the sleeve 21 and is sealed with the sleeve 21; the third drive assembly 72 is connected to the mounting frame 22, and the power output end is connected to the top cover 71, which is used to drive the top cover 71 to move up and down, the air inlet end of the air suction pump 73 is connected to the top cover 71 or the sleeve 21, and the air outlet end is used to be connected to the detection equipment.

[0059] Specifically, the first driving assembly 24 is a motor with a reducer, and the third driving assembly 72 is a mechanism such as a cylinder, a hydraulic cylinder, an electric push rod, etc. that can drive the top cover 71 to move up and down.

[0060] The beneficial effect of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the embodiment of the present invention is as follows: compared with the prior art, the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided by the embodiment of the present invention drives the spiral drill rod 23 to rotate through the first drive component 24, and drives the punching component to move downward through the second drive component to start drilling the detection hole; after the drilling is completed, the second drive component drives the punching component to reset; then, the top cover 71 is driven downward by the drive component to seal with the sheath 21, and then the suction pump 73 is started to start sampling, that is, the drilling and sampling operations can be completed using one device, there is no need to switch the device, and it is easier to realize automation.

[0061] like Figure 1 and Figure 2 As shown, in a specific implementation of the contaminated site source area micro-disturbance investigation sampling device provided in an embodiment of the present invention, a plurality of fixing rods 12 are provided at the bottom of the base 10, and the fixing rods 12 are suitable for being inserted into the ground to fix the base 10 to the ground to avoid movement during operation.

[0062] Specifically, four fixing rods 12 are symmetrically provided at the bottom of the base 10 .

[0063] like Figure 1 As shown, in a specific implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided in an embodiment of the present invention, a gear row 211 is provided on the outer wall of the sheath 21 along the axial direction, and the second driving assembly includes a gear 31 and a motor assembly 32, and the gear 31 is meshed with the gear row 211; the motor assembly 32 is connected to the base 10, and the power output end is connected to the gear 31 to drive the gear 31 to rotate.

[0064] like Figure 1 and Figure 4 As shown, in a specific implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided in an embodiment of the present invention, a plurality of vent groups are provided in the axial direction of the sheath 21, and each vent group includes a plurality of first vents 212 arranged around the sheath 21, and the first vents 212 in the plurality of vent groups are aligned in the axial direction of the sheath 21; a plurality of slide grooves are provided in the axial direction of the sheath 21, and the slide grooves correspond one-to-one to the first vents 212 in the vent groups, and the first vents 212 are provided at the bottom of the slide grooves.

[0065] like Figure 1 and Figure 4 As shown, the air extraction component also includes a gate plate 40, a fourth drive component 43, a heat shrink sleeve 51 and an injection component. The gate plate 40 includes a connecting sleeve 41 and a plurality of slide plates 42. The slide plates 42 correspond to the slide grooves one by one, and the slide plates 42 slide in cooperation with the slide grooves. The plurality of slide plates 42 are connected to the connecting sleeve 41. The slide plates 42 are provided with a plurality of third air holes 421 along the axis. The plurality of third air holes 421 correspond to a plurality of first air holes 212 in the same axis direction one by one; the fourth drive component 43 is connected to the mounting frame 22 or the sleeve 21, and the power output end is connected to the connecting sleeve 41, so as to drive the gate plate 40 to slide up and down so that the third air holes 421 are aligned or misaligned with the first air holes 212; the heat shrink sleeve 51 is arranged inside the sleeve 21 and fits with the inner wall of the sleeve 21; the injection component is connected to the base 10, and is suitable for communicating with the first air holes 212 in the plurality of air hole groups, so as to spray hot air between the heat shrink sleeve 51 and the sleeve 21.

[0066] Specifically, the slide groove is a trapezoidal groove, and the groove area is smaller than the groove bottom area, so as to limit the freedom of the slide plate 42, so that it can only slide along the slide groove, and effectively prevent the slide plate 42 from falling out of the slide groove. The fourth drive assembly 43 is a cylinder, and can also enable a hydraulic cylinder, an electric push rod, etc. to drive the gate plate 40 to move up and down. When the gate plate 40 moves up, the third vent hole 421 is misaligned with the first vent hole 212, and the first vent hole 212 is closed. When the gate plate 40 moves down, the third vent hole 421 is aligned with the first vent hole 212, and the first vent hole 212 is opened.

[0067] Further, such as Figure 1 and Figure 4As shown, in a specific implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided in an embodiment of the present invention, a plurality of second air vents 112 are provided around the guide sleeve 11, and the jet assembly includes a plurality of jet nozzles 111, and the jet nozzles 111 correspond one-to-one to the second air vents 112. The jet nozzles 111 are arranged on the outside of the guide sleeve 11 and connected to the second air vents 112, and the jet nozzles 111 are suitable for being connected to the hot air source through a pipeline.

[0068] During operation, during the drilling process, the third vent hole 421 is misaligned with the first vent hole 212 to prevent soil from being squeezed into the jacket 21; after the drilling is completed, during the upward reset process of the jacket 21, the fourth drive assembly 43 drives the gate 40 to move, so that the third vent hole 421 is aligned with the first vent hole 212, and the first vent hole 212 is opened. In this way, during the ascending process, the first vent hole 212 on the jacket 21 is aligned with the air nozzle 111 from top to bottom, and each time the air nozzle 111 is aligned with the first vent hole 212 The sheath 21 is stagnant for a preset time, and hot air is introduced into the sheath 21 to shrink the heat shrink sleeve 51 from top to bottom until the sheath 21 is reset. At this time, the heat shrink sleeve 51, except for the part clamped in the clamping groove 213, shrinks and fits onto the surface of the auger rod 23 under the action of the hot air, so as to wrap the soil remaining on the auger rod 23 in the heat shrink sleeve 51, so as to prevent the fine dust in the soil on the auger rod 23 from entering the suction pump 73 with the gas during the air extraction process, and even entering the detection equipment, thereby affecting the sampling and detection results.

[0069] like Figure 2 and Figure 5 As shown, in a specific implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided in an embodiment of the present invention, a clamping groove 213 is opened on the inner side of the bottom end of the sheath 21, and the air extraction assembly also includes a clamping assembly, which is used to clamp the lower end of the heat shrink sleeve 51 in the clamping groove 213.

[0070] Specifically, Figure 5 As shown, in a specific implementation of the micro-disturbance survey sampling device for the source area of ​​a contaminated site provided by an embodiment of the present invention, the clamping assembly includes a clamping ring 61 and an airbag 62. The clamping ring 61 is arranged in the clamping groove 213. The lower end of the heat shrink sleeve 51 is clamped between the clamping ring 61 and the sheath 21. The inner diameter of the clamping ring 61 is greater than or equal to the inner diameter of the sheath 21. The airbag 62 is arranged on the side of the clamping ring 61 facing the heat shrink sleeve 51 and is connected to the clamping ring 61 to adjust the holding force. The airbag 62 is provided with an air inlet valve. The airbag 62 is inflated by an inflation mechanism with a pressure gauge to control the air pressure in the airbag 62, thereby controlling the holding force on the heat shrink sleeve 51, so that the heat shrink sleeve 51 can be drawn out of the clamping groove 213 after the auger rod 23 rotates a preset angle.

[0071] Further, such as Figure 5As shown, in a specific implementation of the micro-disturbance investigation and sampling device for the source area of ​​a contaminated site provided in an embodiment of the present invention, an elastic rope 52 is provided at the lower end of the heat shrinkable sleeve 51, and the elastic rope 52 is connected to the heat shrinkable sleeve 51 to drive the lower end of the heat shrinkable sleeve 51 to shrink.

[0072] After the heat shrink sleeve 51 except the part clamped in the clamping groove 213 is completely shrunk and adhered to the surface of the auger rod 23 under the action of hot air, the first driving component 24 drives the auger rod 23 to rotate, and after the remaining part of the heat shrink sleeve 51 is pulled out from the clamping groove 213, the elastic rope 52 drives the heat shrink sleeve 51 to shrink onto the auger rod 23, so that the upper and lower ends of the space between the heat shrink sleeve 51 and the inner wall of the sheath 21 are conductive.

[0073] It should be noted that after the sheath 21 is reset and the heat shrink sleeve 51 is shrunk onto the spiral drill rod 23, the bottom end of the heat shrink sleeve 51 is still clamped in the clamping groove 213, which can effectively prevent hot air from entering the detection hole and affecting the detection result during the process of shrinking the heat shrink sleeve 51. After the hot air in the sheath 21 is discharged by active suction or passive diffusion, the heat shrink sleeve 51 in the clamping groove 213 is pulled out by the rotation of the spiral drill rod 23, and is shrunk onto the spiral drill rod 23 under the action of the elastic rope 52, so that the upper and lower ends of the space between the heat shrink sleeve 51 and the inner wall of the sheath 21 are connected, so that the gas in the detection hole can diffuse upward and be absorbed by the suction pump 73.

[0074] Based on the same inventive concept, the embodiment of the present application also provides a method for sampling a source area of ​​a contaminated site using a micro-disturbance survey, which uses the above-mentioned sampling device to take samples and includes the following steps:

[0075] S01, placing the sampling device at the location where the detection hole needs to be drilled;

[0076] S02, the auger rod 23 is driven to rotate by the first drive assembly 24, and then the sleeve 21 is driven to move downward by the second drive assembly, driving the auger rod 23 to move downward together, and drilling begins; during the drilling process, the soil moves upward along the sleeve 21 and is discharged from the soil discharge window at the top of the sleeve 21;

[0077] S03, after drilling to a preset depth, the auger rod 23 is controlled to stop rotating; the sleeve 21 is driven upward by the second drive assembly until the sleeve 21 is reset;

[0078] S04, during the upward movement of the sleeve 21, hot air is introduced into the air nozzle 111, and the first air vent 212 on the sleeve 21 is aligned with the air nozzle 111 from top to bottom. Each time the air nozzle 111 is aligned with the first air vent 212, the sleeve 21 stops for a preset time, and hot air is introduced into the sleeve 21 to shrink the heat shrink sleeve 51 from top to bottom until the sleeve 21 is reset. At this time, the heat shrink sleeve 51, except for the part clamped in the clamping groove 213, shrinks and adheres to the surface of the auger rod 23 under the action of hot air; so that the soil remaining on the auger rod 23 is wrapped in the heat shrink sleeve 51, so as to prevent the fine dust in the soil on the auger rod 23 from entering the suction pump 73 with the gas during the air extraction process, and even entering the detection equipment, thereby affecting the sampling and detection results;

[0079] S05, discharging the hot air in the sheath 21 by active suction or passive diffusion to avoid affecting the detection result;

[0080] S06, the first driving assembly 24 drives the auger rod 23 to rotate to a preset angle, and the remaining part of the heat shrink sleeve 51 is pulled out from the clamping groove 213, and the elastic rope 52 drives the heat shrink sleeve 51 to shrink onto the auger rod 23, so that the upper and lower ends of the space between the heat shrink sleeve 51 and the inner wall of the jacket 21 are connected, so that the gas in the detection hole can pass through the space between the jacket 21 and the heat shrink sleeve 51;

[0081] S07, drive the top cover 71 downward through the third driving assembly 72, and cover the top of the sheath 21, start the air pump 73, start to extract the gas diffused from the detection hole, connect the air outlet end of the air pump 73 to the detection equipment, and start the detection.

[0082] The beneficial effect of the micro-disturbance survey and sampling method for the source area of ​​a contaminated site provided by the present invention is that compared with the prior art, the micro-disturbance survey and sampling method for the source area of ​​a contaminated site provided by the present invention uses the above-mentioned sampling device for drilling and sampling, does not require a switching device, and is easier to realize automation.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-disturbance survey sampling device for source areas of contaminated sites, characterized in that: include: A base, the upper side of which is provided with a vertically arranged guide sleeve, and the base is suitable for being fixed on the ground; The drilling assembly comprises a sleeve, an auger rod, a mounting frame and a first driving assembly, wherein the sleeve is arranged in the guide sleeve and is slidably matched with the guide sleeve; the auger rod is arranged in the sleeve, and both upper and lower ends protrude from the sleeve; the mounting frame is arranged on the top of the sleeve and connected to the sleeve, and a soil discharge window is provided on the side of the mounting frame; the first driving assembly is connected to the mounting frame, and the power output end is connected to the auger rod; A second driving assembly is connected to the base, and a power output end is connected to the sheath, and is used to drive the sheath to move up and down; as well as An air extraction assembly comprises a top cover, a third drive assembly and an air suction pump, wherein the top cover is arranged on the upper side of the sheath and is in sealing and sliding cooperation with the rotating shaft of the auger rod, and the top cover is suitable for covering the top end of the sheath and is in sealing cooperation with the sheath; the third drive assembly is connected to the mounting frame, and the power output end is connected to the top cover to drive the top cover to move up and down, the air inlet end of the air suction pump is connected to the top cover or the sheath, and the air outlet end is used to be connected to the detection equipment; The sleeve is provided with a plurality of vent groups along the axial direction, each of the vent groups includes a plurality of first vents arranged around the sleeve, and the first vents in the plurality of vent groups are aligned in the axial direction of the sleeve; the sleeve is provided with a plurality of slide grooves along the axial direction, the slide grooves correspond to the first vents in the vent groups one by one, and the first vents are provided at the bottom of the slide grooves; The air extraction assembly also includes: The gate plate comprises a connecting sleeve and a plurality of sliding plates, wherein the sliding plates correspond to the sliding grooves one by one, the sliding plates are slidably matched with the sliding grooves, the plurality of sliding plates are connected to the connecting sleeve, the sliding plates are provided with a plurality of third vent holes along the axis, and the plurality of the third vent holes correspond to the plurality of the first vent holes in the same axis direction one by one; A fourth driving assembly is connected to the mounting frame or the jacket, and a power output end is connected to the connecting sleeve, and is used to drive the gate to slide up and down so that the third vent hole is aligned with or misaligned with the first vent hole; A heat shrink sleeve, the heat shrink sleeve is arranged inside the sheath and fits with the inner wall of the sheath; and The jet assembly is connected to the base and is suitable for being communicated with the first vent holes in the plurality of vent hole groups, and is used for jetting hot air between the heat shrink sleeve and the protective sleeve.

2. The polluted site source area micro-disturbance survey sampling device according to claim 1, characterized in that: A plurality of fixing rods are arranged at the bottom of the base, and the fixing rods are suitable for being inserted into the ground.

3. The polluted site source area micro-disturbance survey sampling device according to claim 1, characterized in that: The outer wall of the sheath is provided with a tooth row along the axial direction, and the second driving assembly comprises: a gear meshing with the gear row; and The motor assembly is connected to the base, and a power output end is connected to the gear to drive the gear to rotate.

4. The polluted site source area micro-disturbance survey sampling device according to claim 1, characterized in that: The guide sleeve is provided with a plurality of second air vents along its circumference, and the jet assembly includes a plurality of jet nozzles, each of which corresponds to the second air vents one by one. The jet nozzles are arranged on the outside of the guide sleeve and connected to the second air vents, and the jet nozzles are suitable for communicating with a hot air source through a pipeline.

5. The polluted site source area micro-disturbance survey sampling device according to claim 1, characterized in that: A clamping groove is provided on the inner side of the bottom end of the sheath, and the air extraction assembly further comprises a clamping assembly, which is used to clamp the lower end of the heat shrink sleeve in the clamping groove.

6. The polluted site source area micro-disturbance survey sampling device according to claim 5, characterized in that: The clamping assembly includes a clamping ring and an airbag, the clamping ring is arranged in the clamping groove, the lower end of the heat shrink sleeve is clamped between the clamping ring and the sleeve, and the inner diameter of the clamping ring is greater than or equal to the inner diameter of the sleeve; the airbag is arranged on the side of the clamping ring facing the heat shrink sleeve and is connected to the clamping ring to adjust the holding force; the airbag is provided with an air inlet valve.

7. The polluted site source area micro-disturbance survey sampling device according to claim 5, characterized in that: An elastic rope is provided at the lower end of the heat shrink sleeve, and the elastic rope is connected to the heat shrink sleeve to drive the lower end of the heat shrink sleeve to shrink; After the heat shrink sleeve, except for the part clamped in the clamping groove, is completely shrunk and adhered to the surface of the auger rod under the action of hot air, the first driving component drives the auger rod to rotate, and after the remaining part of the heat shrink sleeve is pulled out from the clamping groove, the elastic rope drives the heat shrink sleeve to shrink onto the auger rod, so that the upper and lower ends of the space between the heat shrink sleeve and the inner wall of the sheath are conductive.

8. A method for sampling micro-disturbance survey of source areas of contaminated sites, characterized in that: Sampling using the sampling device according to any one of claims 1 to 7, and comprising the following steps: S01, placing the sampling device at a location where a detection hole needs to be drilled; S02, driving the auger rod to rotate by the first driving assembly, and then driving the casing to move downward by the second driving assembly, driving the auger rod to move downward together, and starting drilling; during the drilling process, soil moves upward along the casing and is discharged from the soil discharge window at the top of the casing; S03, after drilling to a preset depth, controlling the auger rod to stop rotating; and driving the casing to move upward through the second driving assembly until the casing is reset; S07, driving the top cover downward through the third driving assembly, covering the top of the sheath, starting the air pump, starting to extract the gas diffused from the detection hole, connecting the air outlet of the air pump to the detection equipment, and starting the detection.

9. The method for micro-disturbance survey and sampling of a contaminated site source area according to claim 8, characterized in that: When the sampling device according to claim 7 is used, between steps S03 and S07, the following steps are also included: S04, during the upward movement of the sleeve, hot air is introduced into the air nozzle, the first air hole on the sleeve is aligned with the air nozzle from top to bottom, and each time the air nozzle is aligned with the first air hole, the sleeve stops for a preset time, hot air is introduced into the sleeve to shrink the heat shrink sleeve from top to bottom until the sleeve is reset, at which time, the heat shrink sleeve, except for the part clamped in the clamping groove, is completely shrunk and adhered to the surface of the auger rod under the action of the hot air; S05, discharging the hot air in the sheath by active suction or passive diffusion; S06, driving the auger rod to rotate a preset angle through the first driving component, pulling the remaining part of the heat shrink sleeve out of the clamping groove, and the elastic rope drives the heat shrink sleeve to shrink onto the auger rod, so that the upper and lower ends of the space between the heat shrink sleeve and the inner wall of the sheath are connected, so that the gas in the detection hole can pass through the space between the sheath and the heat shrink sleeve.

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