Soil gas and underground water integrated sampling equipment and method

Abstract

The invention discloses soil gas and underground water integrated sampling equipment and method, a sampling vertical shaft communicated with underground water is drilled on the ground, the equipment comprises a soil gas sampling mechanism placed in the sampling vertical shaft in the vertical direction, and an underground water sampling mechanism is arranged at the lower end of the soil gas sampling mechanism; the soil gas sampling mechanism comprises a soil gas sampling containing pipe shell which is vertically arranged in an extending mode, a soil gas collecting outward-extending hole which is through inside and outside in the radial direction is formed in the side wall of the soil gas sampling containing pipe shell, and a soil gas collecting outward-extending pipe is slidably connected into the soil gas sampling containing pipe shell in the radial direction; the soil gas collection extension pipe is communicated with a soil gas sample storage bottle through a soil gas conveying pipe; in the soil gas sampling process, the equipment can effectively prevent external air from being mixed in, reduce adsorption or degradation of gas components in the sampling process, ensure the gas concentration and truly reflect the original state in soil pores.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a soil gas and groundwater integrated sampling device and method. Background Art

[0002] Soil gas refers to the mixture of gases that fill soil pores, primarily existing in the vadose zone (the area of ​​the soil not saturated with water) between the surface and the groundwater table. Its composition is complex, including gases from the atmosphere, gases generated by soil biological activity, and gases resulting from the volatilization or conversion of pollutants in the soil. Groundwater refers to water buried in soil pores, rock cracks, or caves below the surface, primarily derived from atmospheric precipitation, infiltration of surface runoff, and meltwater from ice and snow.

[0003] The core purpose of collecting soil gas and groundwater is to obtain key information on environmental quality, resource status, or ecological risks by analyzing their physical, chemical, or biological characteristics. By detecting volatile pollutants (such as benzene and halogenated hydrocarbons), it is possible to quickly determine whether the soil is contaminated, the scope of contamination, and the trend of its spread. For example, in a chemical site investigation, an abnormal increase in VOCs in soil gas may indicate the presence of an underground leak. Analyzing indicators such as pH value, heavy metal content, and organic matter concentration can assess whether groundwater is contaminated (such as pollution caused by industrial wastewater leakage, agricultural fertilizer loss, etc.) and trace the source of pollution. Summary of the Invention

[0004] The object of the present invention is to provide a soil gas and groundwater integrated sampling device and method, which can collect soil gas and groundwater more efficiently.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A soil gas and groundwater integrated sampling device, wherein a sampling shaft connected to the groundwater is drilled on the ground, and characterized in that it comprises a soil gas sampling mechanism placed vertically in the sampling shaft, and a groundwater sampling mechanism is provided at the lower end of the soil gas sampling mechanism;

[0007] The soil gas sampling mechanism includes a vertically extending soil gas sampling housing, a side wall of which is provided with a soil gas sampling extension hole extending radially inwardly and outwardly therefrom, a soil gas sampling extension tube slidably connected radially inside the soil gas sampling housing, and the soil gas sampling extension tube is connected to a soil gas sample storage bottle via a soil gas delivery tube;

[0008] The sliding direction of the soil gas collection extension tube is consistent with the axial direction of the soil gas collection extension hole. The end of the soil gas collection extension tube close to the soil gas collection extension hole is a pointed end. The outer wall of the end of the soil gas collection extension tube close to the soil gas collection extension hole has multiple soil gas input holes that communicate with each other.

[0009] The groundwater sampling mechanism includes a groundwater sampling containing tube shell fixed at the lower end of the soil gas sampling containing tube shell. The bottom of the groundwater sampling containing tube shell is provided with a vertically penetrating sampling input tube connection hole. A groundwater sampling input tube is slidably connected to the sampling input tube connection hole along the vertical direction. The upper end of the groundwater sampling input tube is connected to a water sample slow sampling drive mechanism through a groundwater delivery pipe. The water sample slow sampling drive mechanism is connected to multiple groundwater sample storage bottles.

[0010] Preferably, an outward drive support beam extending radially along the inner side wall of the soil gas sampling accommodating tube shell is fixed, an outward drive support slide rail is fixed on the outward drive support beam, an outward drive support slider is slidably connected to the outward drive support slide rail, and the soil gas collection outward tube is fixed on the outward drive support slider.

[0011] Description: The outward drive support slider is driven by a prior art servo motor fixed on the outward drive support beam through a threaded screw structure to move along the outward drive support slide rail. The outward drive support slider then drives the soil gas collection outward tube to pass through the outward opening and closing matching hole and the soil gas collection outward hole and insert into the soil on the side wall of the sampling shaft.

[0012] Preferably, a partial sealing mechanism is provided on the outside of the soil gas sampling accommodating tube shell, the partial sealing mechanism comprising two partial sealing accommodating ring grooves provided on the outside of the soil gas sampling accommodating tube shell, a partial sealing fixing ring being fixed in the partial sealing accommodating ring groove, a partial sealing sliding ring being slidably connected in the partial sealing accommodating ring groove, and a closed expansion ring being fixed between the partial sealing fixing ring and the partial sealing sliding ring;

[0013] A partially closed expansion chamber is formed between the end of the partially closed fixed ring and the partially closed sliding ring that are close to each other, the inner side of the closed expansion ring and the side wall of the partially closed containing ring groove; a partially closed control ring shell is fixed on the inner side of the soil gas sampling containing tube shell; the interior of the partially closed control ring shell is connected to the interior of the partially closed expansion chamber through a closed control connecting hole; a partially closed driving pump is fixed in the soil gas sampling containing tube shell; the output end of the partially closed driving pump is connected to the interior of the partially closed control ring shell through a pipeline.

[0014] Description: The local sealing mechanism can form a relatively closed cavity near the soil gas collection extension hole, preventing the outside air from interfering with the soil gas sampling process and facilitating the collection of purer soil gas.

[0015] Preferably, an extension hole opening and closing mechanism is provided in the soil gas sampling housing at the soil gas collection extension hole. The inner side of the soil gas collection extension hole has a spherical mating ring groove coaxially arranged therewith. The extension hole opening and closing mechanism includes an extension opening and closing control ball spherically contacting and mating with the spherical mating ring groove. The extension opening and closing control ball has an extension opening and closing mating hole extending along its diameter.

[0016] The top and bottom of the extended opening and closing control ball are each fixed with a vertically extending ball rotation support shaft, and the inner wall of the soil gas sampling accommodating tube shell and the upper and lower sides of the soil gas collection extended hole are each fixed with an extended opening and closing support seat, and the extended opening and closing support seat has a vertically through ball rotation connection hole, and the ball rotation support shaft rotatably fits in the ball rotation connection hole.

[0017] Note: When the external opening and closing matching hole is coaxially aligned with the soil gas collection external hole, the external hole opening and closing mechanism is in the open state; when the external opening and closing matching hole is offset and isolated from the soil gas collection external hole, the external hole opening and closing mechanism is in the closed state. The external hole opening and closing mechanism is used to control the connectivity of the soil gas collection external hole to prevent external debris from entering the soil gas sampling housing through the soil gas collection external hole.

[0018] Preferably, the soil gas sample storage bottle is a vertically through double-bottle mouth structure, and is connected to the soil gas sample storage bottle with a soil gas negative pressure driving mechanism, the soil gas negative pressure driving mechanism includes a negative pressure driving support seat fixed on the inner side wall of the soil gas sampling and containing tube shell, the negative pressure driving support seat is rotatably connected to a storage bottle integrated disc with a vertically extending axis, and the outer edge of the storage bottle integrated disc is provided with a plurality of vertically extending storage bottle clamping grooves, and the soil gas sample storage bottle is clamped and fixed in each storage bottle clamping groove;

[0019] The inner top and the inner bottom of the soil gas sample storage bottle are both provided with a storage bottle one-way valve, and the conduction direction of the storage bottle one-way valve is from bottom to top;

[0020] The top and bottom of the storage bottle integrated disc are respectively provided with an upper drive circulation hole and a lower drive circulation hole extending vertically and connected to the storage bottle clamping groove. The upper drive circulation hole and the lower drive circulation hole are respectively connected to the upper end and the lower end of the soil gas sample storage bottle;

[0021] An upper circulation matching tube and a lower circulation matching tube extending vertically are fixed on the negative pressure drive support seat and on the upper and lower sides of the storage bottle integrated disc, respectively. The lower end of the upper circulation matching tube contacts and matches the top of the storage bottle integrated disc, and the upper end of the lower circulation matching tube contacts and matches the bottom of the storage bottle integrated disc.

[0022] The lower end of the upper end circulation matching tube is connected to the upper end driving circulation hole, and the upper end of the lower end circulation matching tube is connected to the lower end driving circulation hole;

[0023] A negative pressure driven vacuum tank is fixed in the soil gas sampling housing, and the negative pressure driven vacuum tank is connected to the upper end of the upper flow matching tube through a negative pressure driven connecting pipe, and a negative pressure driven control valve is provided on the negative pressure driven connecting pipe;

[0024] The soil gas conveying pipe is communicated with the lower end of the lower end flow matching pipe.

[0025] Description: The interior of the negative pressure driven vacuum tank is in a vacuum state. Open the negative pressure driven control valve. Under the action of negative pressure, the soil gas in the soil diffuses into the soil gas collection extension tube through the soil gas input hole. The soil gas entering the soil gas collection extension tube flows through the soil gas transmission tube, the lower end flow matching tube, the soil gas sample storage bottle, the upper end flow matching tube and the negative pressure driven connecting tube in sequence and finally enters the interior of the negative pressure driven vacuum tank. When the soil gas flows through the soil gas sample storage bottle, it will be intercepted and stored in the soil gas sample storage bottle to form a soil gas sample.

[0026] Preferably, a vertically extending input pipe lifting support slide rail is fixed on the inner side wall of the groundwater sampling accommodating tube shell, an input pipe lifting support slider is slidably connected to the input pipe lifting support slide rail, and the input pipe lifting support slider is fixedly connected to the groundwater sampling input pipe.

[0027] Description: The input tube lifting support slider is driven by a prior art servo motor fixed on the inner wall of the groundwater sampling tube shell through a gear rack transmission to move along the input tube lifting support slide rail. The input tube lifting support slider drives the groundwater sampling input tube to move up and down together, thereby adjusting the depth of the lower end of the groundwater sampling input tube immersed in the groundwater.

[0028] Preferably, the water sample slow sampling drive mechanism comprises a slow sampling temporary storage shell fixed in the groundwater sampling housing and vertically extending, a slow sampling drive piston being slidably connected in the slow sampling temporary storage shell, and the slow sampling drive piston dividing the interior of the slow sampling temporary storage shell into a slow sampling water sample chamber and a slow sampling vacuum chamber;

[0029] A slow sampling input pipe and a slow sampling output pipe connected to the slow sampling water sample chamber are fixed on the outside of the slow sampling temporary storage shell, and the groundwater delivery pipe is connected to the slow sampling input pipe;

[0030] A vacuum drive input pipe and a vacuum drive output pipe connected to the slow extraction vacuum chamber are fixed on the outside of the slow extraction temporary storage shell;

[0031] A slow-sampling drive vacuum tank and a slow-sampling drive high-pressure tank are fixed in the groundwater sampling housing shell. The slow-sampling drive vacuum tank has a vacuum tank input pipe and a vacuum tank output pipe connected to the interior thereof. The slow-sampling drive high-pressure tank has a high-pressure tank input pipe and a high-pressure tank output pipe connected to the interior thereof. A slow-sampling drive air pump is fixed in the groundwater sampling housing shell.

[0032] The vacuum drive output pipe is connected to the vacuum tank input pipe, the vacuum tank output pipe is connected to the input end of the slow-production drive suction pump, the output end of the slow-production drive suction pump is connected to the high-pressure tank input pipe, and the high-pressure tank output pipe is connected to the vacuum drive input pipe.

[0033] Description: Under the vacuum action inside the slow sampling drive vacuum tank, the slow sampling drive piston slides upward in the slow sampling temporary storage shell, so that the volume of the slow sampling water sample chamber increases and the volume of the slow sampling vacuum chamber decreases, and the groundwater is input into the slow sampling water sample chamber through the groundwater sampling input pipe and the groundwater delivery pipe, so that the increase rate of the slow sampling water sample chamber volume is controlled at ml / min, avoiding excessive disturbance of the groundwater body during the collection process.

[0034] Preferably, a horizontally arranged sampling support partition is fixed in the groundwater sampling accommodating tube shell, a sampling bottle support ring with an axis arranged in a vertical direction is fixed on the top of the sampling support partition, a sampling bottle support shaft coaxially arranged therewith is rotatably connected in the sampling bottle support ring, a sampling bottle receiving disc is fixed on the top of the sampling bottle support shaft, and the outer side of the sampling bottle receiving disc has a plurality of sampling bottle clamping constraint holes extending radially therefrom, and the groundwater sample storage bottle is clamped and fixed in the sampling bottle clamping constraint holes;

[0035] A horizontally arranged sampling injection support beam is fixed in the groundwater sampling accommodating tube shell, a sampling injection support slide rail is fixed to the lower side of the sampling injection support beam, a sampling injection support slider is movably connected to the lower side of the sampling injection support slide rail, a sampling injection syringe is fixed to the lower side of the sampling injection support slider, and the sampling injection syringe is connected to the slow sampling output tube through a pipeline;

[0036] The sampling injection support sliding block is driven by a prior art servo motor fixed on the sampling injection support beam through a gear rack transmission to move along the sampling injection support slide rail.

[0037] Description: The sampling injection support slider is driven by the existing servo motor fixed on the sampling injection support beam through the gear rack transmission to move along the sampling injection support slide rail. The sampling injection support slider will drive the sampling injection syringe to move toward the direction close to the groundwater sample storage bottle. The bottle mouth of the groundwater sample storage bottle is sealed by a rubber stopper, so that the needle part of the sampling injection syringe passes through the rubber stopper at the bottle mouth of the groundwater sample storage bottle, and then injects the groundwater into the groundwater sample storage bottle.

[0038] On the other hand, the present invention also provides a soil gas and groundwater integrated sampling method, based on the above-mentioned soil gas and groundwater integrated sampling device, comprising the following steps:

[0039] S1. Drilling and equipment installation:

[0040] Drill a sampling shaft on the ground that is connected to the groundwater, hoist the entire soil gas sampling mechanism and the groundwater sampling mechanism into the sampling shaft, with the groundwater sampling mechanism below the soil gas sampling mechanism and the lower end of the groundwater sampling input pipe immersed in the groundwater;

[0041] S2. Soil gas sampling:

[0042] The soil gas collection extension tube is inserted into the soil through the soil gas collection extension hole. The soil gas enters the soil gas collection extension tube through the soil gas input hole, and then is introduced into the soil gas sample storage bottle through the soil gas transmission tube for storage.

[0043] S3. Groundwater sampling:

[0044] Driven by the water sample slow sampling driving mechanism, groundwater is sucked into the groundwater sampling input pipe, and under the pumping action of the water sample slow sampling driving mechanism, the groundwater sample is transported to the groundwater sample storage bottle for storage.

[0045] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0046] 1. The present invention has a reasonable structural design. During the soil gas sampling process, it can effectively prevent the mixing of external air, reduce the adsorption or degradation of gas components during the sampling process, ensure the gas concentration, and truly reflect the original state in the soil pores;

[0047] 2. The present invention is easy to operate. During the groundwater sampling process, it complies with the principle of low-flow sampling, avoiding water mixing caused by disturbing the groundwater flow field. At the same time, the sampling bottle is made of inert material, which effectively prevents the adsorption or dissolution of target pollutants such as heavy metals and organic matter;

[0048] 3. The present invention has good environmental adaptability and durability, and is compatible with complex terrain. The entire device is small in size and can adapt well to various usage scenarios such as mountains, farmlands, urban green spaces, and is easy to transport and move using a carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall layout of the present invention;

[0050] Figure 2 It is a structural schematic diagram of the soil gas sampling mechanism of the present invention;

[0051] Figure 3 It is a structural schematic diagram of the partial sealing mechanism of the present invention;

[0052] Figure 4 It is a structural schematic diagram of the opening and closing mechanism of the outward extending hole of the present invention;

[0053] Figure 5Schematic diagram of the structure of the soil gas negative pressure driving mechanism of the present invention;

[0054] Figure 6 It is a structural schematic diagram of the groundwater sampling mechanism of the present invention.

[0055] In the figure, 10-soil gas sampling mechanism, 102-sampling shaft, 11-soil gas sampling housing tube shell, 110-soil gas collection extension hole, 12-soil gas collection extension tube, 120-soil gas input hole, 121-soil gas delivery tube, 13-soil gas sample storage bottle, 14-partial sealing mechanism, 140-partially sealed expansion chamber, 141-partially sealed housing ring groove, 142-partially sealed fixing ring, 143-partially sealed sliding ring, 144-closed expansion ring, 145-partially sealed control ring shell, 1450-closed control connecting hole, 146-partially sealed drive pump, 15- Extended hole opening and closing mechanism, 150-spherical matching ring groove, 151-extended opening and closing control ball, 152-extended opening and closing matching hole, 153-sphere rotation support shaft, 154-extended opening and closing support seat, 1540-sphere rotation connection hole, 16-soil gas negative pressure drive mechanism, 161-negative pressure drive support seat, 162-storage bottle integrated disc, 1620-storage bottle clamping groove, 1621-upper end drive circulation hole, 1622-lower end drive circulation hole, 163-upper end circulation matching pipe, 164-lower end circulation matching pipe, 165-negative pressure drive vacuum tank, 1650-negative pressure drive connecting pipe, 1651 -Negative pressure drive control valve, 17-Extended drive support beam, 171-Extended drive support slide rail, 172-Extended drive support slider, 20-Groundwater sampling mechanism, 21-Groundwater sampling housing shell, 211-Sampling input pipe connection hole, 212-Sampling support partition, 22-Groundwater sampling input pipe, 220-Groundwater delivery pipe, 23-Water sample slow sampling drive mechanism, 2301-Slow sampling water sample chamber, 2302-Slow sampling vacuum chamber, 231-Slow sampling temporary storage shell, 2311-Slow sampling input pipe, 2312-Slow sampling output pipe, 2313-Vacuum drive input pipe, 2314-Vacuum drive Dynamic output tube, 232-slow extraction drive piston, 233-slow extraction drive vacuum tank, 2331-vacuum tank input tube, 2332-vacuum tank output tube, 234-slow extraction drive high-pressure tank, 2341-high-pressure tank input tube, 2342-high-pressure tank output tube, 235-slow extraction drive air pump, 24-groundwater sample storage bottle, 241-sampling bottle support ring, 242-sampling bottle support shaft, 243-sampling bottle storage disc, 244-sampling bottle clamping constraint hole, 245-sampling injection support beam, 246-sampling injection support slide rail, 247-sampling injection support slider, 248-sampling injection syringe. DETAILED DESCRIPTION

[0056] The following combination Figures 1 to 6The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are consistent with the up, down, left, right, front and back directions of the projection relationship of each main view or structural schematic diagram itself.

[0057] Example 1:

[0058] An integrated soil gas and groundwater sampling device, such as Figure 1 As shown, a sampling shaft 102 connected to groundwater is drilled on the ground, which is characterized by comprising a soil gas sampling mechanism 10 placed vertically into the sampling shaft 102, and a groundwater sampling mechanism 20 is provided at the lower end of the soil gas sampling mechanism 10;

[0059] like Figure 2 As shown, the soil gas sampling mechanism 10 includes a vertically extending soil gas sampling housing 11. The side wall of the soil gas sampling housing 11 has a soil gas collection extension hole 110 extending radially inwardly and outwardly therefrom. A soil gas collection extension tube 12 is slidably connected radially inside the soil gas sampling housing 11. The soil gas collection extension tube 12 is connected to a soil gas sample storage bottle 13 via a soil gas delivery tube 121.

[0060] like Figure 4 As shown, the sliding direction of the soil gas collection extension tube 12 is consistent with the axial direction of the soil gas collection extension hole 110. The end of the soil gas collection extension tube 12 close to the soil gas collection extension hole 110 is a pointed end. The outer wall of the end of the soil gas collection extension tube 12 close to the soil gas collection extension hole 110 has a plurality of soil gas input holes 120 that communicate with each other.

[0061] like Figure 2 As shown, the groundwater sampling mechanism 20 includes a groundwater sampling accommodating tube shell 21 fixed to the lower end of the soil gas sampling accommodating tube shell 11. The bottom of the groundwater sampling accommodating tube shell 21 has a vertically penetrating sampling input tube connection hole 211. A groundwater sampling input tube 22 is slidably connected to the sampling input tube connection hole 211 along the vertical direction. The upper end of the groundwater sampling input tube 22 is connected to a water sample slow sampling drive mechanism 23 through a groundwater conveying pipe 220. The water sample slow sampling drive mechanism 23 is connected to a plurality of groundwater sample storage bottles 24.

[0062] like Figure 3 As shown, an outward drive support beam 17 extending radially along the inner side wall of the soil gas sampling housing 11 is fixed, an outward drive support slide rail 171 is fixed to the outward drive support slide rail 171, an outward drive support slider 172 is slidably connected to the outward drive support slide rail 171, and the soil gas sampling outward tube 12 is fixed to the outward drive support slider 172;

[0063] The outward drive support slider 172 is driven by a conventional servo motor fixed on the outward drive support beam 17 through a threaded screw structure to move along the outward drive support slide rail 171 .

[0064] like Figure 6 As shown, a vertically extending input pipe lifting support rail 25 is fixed to the inner side wall of the groundwater sampling housing 21, and an input pipe lifting support slider 251 is slidably connected to the input pipe lifting support rail 25. The input pipe lifting support slider 251 is fixedly connected to the groundwater sampling input pipe 22;

[0065] The input pipe lifting support slider 251 is driven by a prior art servo motor fixed on the inner wall of the groundwater sampling container shell 21 through a gear rack transmission to move along the input pipe lifting support slide rail 25.

[0066] Example 2:

[0067] This embodiment describes a soil gas and groundwater integrated sampling method, based on a soil gas and groundwater integrated sampling device according to the above embodiment 1, including the following steps:

[0068] S1. Drilling and equipment installation:

[0069] A sampling shaft 102 connected to the groundwater is drilled on the ground. The entire soil gas sampling mechanism 10 and the groundwater sampling mechanism 20 are hoisted and placed into the sampling shaft 102. The groundwater sampling mechanism 20 is located below the soil gas sampling mechanism 10, and the lower end of the groundwater sampling input pipe 22 is immersed in the groundwater.

[0070] S2. Soil gas sampling:

[0071] The soil gas collection extension tube 12 is inserted into the soil through the soil gas collection extension hole 110. The soil gas enters the soil gas collection extension tube 12 through the soil gas input hole 120, and then is introduced into the soil gas sample storage bottle 13 through the soil gas delivery tube 121 for storage.

[0072] S3. Groundwater sampling:

[0073] Under the driving force of the water sample slow sampling driving mechanism 23, groundwater is sucked into the groundwater sampling input pipe 22, and under the pumping action of the water sample slow sampling driving mechanism 23, the groundwater sample is transported to the groundwater sample storage bottle 24 for storage;

[0074] The input tube lifting support slider 251 is driven by a prior art servo motor fixed on the inner wall of the groundwater sampling tube shell 21 and moves along the input tube lifting support slide rail 25 through a gear rack transmission. The input tube lifting support slider 251 drives the groundwater sampling input tube 22 to move up and down together, and can adjust the depth of the lower end of the groundwater sampling input tube 22 immersed in the groundwater.

[0075] Example 3:

[0076] On the basis of Example 1, Figure 2 As shown, a local sealing mechanism 14 is provided on the outside of the soil gas sampling housing 11. Figure 3 As shown, the partial sealing mechanism 14 includes two partial sealing accommodating ring grooves 141 provided on the outside of the soil gas sampling accommodating tube shell 11, a partial sealing fixing ring 142 is fixed in the partial sealing accommodating ring groove 141, a partial sealing sliding ring 143 is slidably connected in the partial sealing accommodating ring groove 141, and a closed expansion ring 144 is fixed between the partial sealing fixing ring 142 and the partial sealing sliding ring 143;

[0077] The closed expansion ring 144 is made of rubber;

[0078] A partially closed expansion chamber 140 is formed between the end where the partially closed fixed ring 142 and the partially closed sliding ring 143 are close to each other, the inner side of the closed expansion ring 144 and the side wall of the partially closed accommodating ring groove 141. A partially closed control ring shell 145 is fixed on the inner side of the soil gas sampling accommodating tube shell 11. The interior of the partially closed control ring shell 145 is connected to the interior of the partially closed expansion chamber 140 through the closed control connecting hole 1450. A partially closed driving pump 146 is fixed in the soil gas sampling accommodating tube shell 11. The output end of the partially closed driving pump 146 is connected to the interior of the partially closed control ring shell 145 through a pipeline.

[0079] like Figure 4 As shown, an external hole opening and closing mechanism 15 is provided at the soil gas sampling external hole 110 in the soil gas sampling housing 11. A spherical mating annular groove 150 is provided on the inner side of the soil gas sampling external hole 110 and is coaxially arranged therewith. The external hole opening and closing mechanism 15 includes an external opening and closing control ball 151 that is spherically contact-fitted in the spherical mating annular groove 150. The external opening and closing control ball 151 has an external opening and closing mating hole 152 extending along its diameter.

[0080] A vertically extending ball rotation support shaft 153 is fixed to the top and bottom of the extended opening and closing control ball 151. An extended opening and closing support seat 154 is fixed to the inner side wall of the soil gas sampling housing 11 and located on the upper and lower sides of the soil gas sampling extended hole 110. The extended opening and closing support seat 154 has a vertically extending ball rotation connection hole 1540, and the ball rotation support shaft 153 is rotatably fitted in the ball rotation connection hole 1540;

[0081] The spherical body rotation support shaft 153 is driven by a prior art servo motor fixed on the outwardly extending opening and closing support seat 154 through gear transmission to rotate around the vertical axis of the spherical body rotation connection hole 1540.

[0082] like Figure 5 As shown, the soil gas sample storage bottle 13 is a vertically through double-bottle mouth structure, and a soil gas negative pressure driving mechanism 16 is connected to the soil gas sample storage bottle 13. The soil gas negative pressure driving mechanism 16 includes a negative pressure driving support seat 161 fixed on the inner side wall of the soil gas sampling and containing tube shell 11. A storage bottle integrated disc 162 with a vertically extending axis is rotatably connected to the negative pressure driving support seat 161. The outer edge of the storage bottle integrated disc 162 has a plurality of vertically extending storage bottle clamping grooves 1620, and the soil gas sample storage bottle 13 is clamped and fixed in each storage bottle clamping groove 1620;

[0083] The storage bottle integrated disc 162 is driven by a prior art servo motor fixed to the negative pressure drive support base 161 through gear transmission to rotate around the vertical axis;

[0084] The inner top and the inner bottom of the soil gas sample storage bottle 13 are both provided with a storage bottle one-way valve 130, and the conduction direction of the storage bottle one-way valve 130 is from bottom to top;

[0085] The top and bottom of the storage bottle integrated disc 162 respectively have an upper drive circulation hole 1621 and a lower drive circulation hole 1622 extending vertically and communicating with the storage bottle clamping groove 1620. The upper drive circulation hole 1621 and the lower drive circulation hole 1622 are respectively communicated with the upper end and the lower end of the soil vapor sample storage bottle 13;

[0086] An upper circulation cooperating tube 163 and a lower circulation cooperating tube 164 extending vertically are fixed to the negative pressure drive support seat 161 and located on the upper and lower sides of the storage bottle integrated disc 162, respectively. The lower end of the upper circulation cooperating tube 163 contacts and cooperates with the top of the storage bottle integrated disc 162, and the upper end of the lower circulation cooperating tube 164 contacts and cooperates with the bottom of the storage bottle integrated disc 162.

[0087] The lower end of the upper end circulation matching tube 163 is connected to the upper end driving circulation hole 1621, and the upper end of the lower end circulation matching tube 164 is connected to the lower end driving circulation hole 1622;

[0088] A negative pressure driven vacuum tank 165 is fixed in the soil gas sampling housing 11. The negative pressure driven vacuum tank 165 is connected to the upper end of the upper end flow matching tube 163 through a negative pressure driven connecting tube 1650. The negative pressure driven connecting tube 1650 is provided with a negative pressure driven control valve 1651.

[0089] The soil gas transport pipe 121 is connected to the lower end of the lower end flow matching pipe 164.

[0090] Example 4:

[0091] This embodiment describes a soil gas and groundwater integrated sampling method, which is based on a soil gas and groundwater integrated sampling device according to the aforementioned embodiment 3. The difference from embodiment 2 is that, in step S2, when the externally extending opening and closing matching hole 152 is coaxially aligned with the soil gas collection external hole 110, the externally extending hole opening and closing mechanism 15 is in an open state; and when the externally extending opening and closing matching hole 152 is misaligned and isolated from the soil gas collection external hole 110, the externally extending hole opening and closing mechanism 15 is in a closed state.

[0092] In the initial state, the extension hole opening and closing mechanism 15 is in the closed state, and the local sealing mechanism 14 is used to form a local closed cavity at the soil gas collection extension hole 110, so as to facilitate the collection of purer soil gas;

[0093] The partially closed driving pump 146 is used to inflate the partially closed control ring housing 145. The air in the partially closed control ring housing 145 enters the partially closed expansion chamber 140 through the closed control communication hole 1450. Under the pressure, the closed expansion ring 144 expands and the outer surface of the closed expansion ring 144 pressurizes against the inner wall of the sampling shaft 102.

[0094] A relatively closed cavity is formed between the two expanded closed expansion rings 144 to prevent external air from interfering with the soil gas sampling process;

[0095] Next, the extended hole opening and closing mechanism 15 is controlled to be in the open state. The ball rotation support shaft 153 is driven by a conventional servo motor fixed to the extended opening and closing support seat 154 through a gear transmission to rotate around the vertical axis of the ball rotation connection hole 1540. The ball rotation support shaft 153 drives the extended opening and closing control ball 151 to rotate together. When the extended opening and closing matching hole 152 and the soil gas collection extended hole 110 are coaxially aligned, the extended opening and closing control ball 151 stops rotating.

[0096] Then, the outward drive support slider 172 is driven by a conventional servo motor fixed to the outward drive support beam 17 through a screw rod structure to move along the outward drive support slide rail 171. The outward drive support slider 172 drives the soil gas collection outward tube 12 to move together, and the tip of the soil gas collection outward tube 12 passes through the outward opening and closing matching hole 152 and the soil gas collection outward hole 110 and is inserted into the soil on the side wall of the sampling shaft 102.

[0097] In the initial state, the interior of the negative pressure driven vacuum tank 165 is in a vacuum state. The negative pressure driven control valve 1651 is opened. Under the action of negative pressure, the soil gas in the soil diffuses into the interior of the soil gas collection extension tube 12 through the soil gas input hole 120. The soil gas entering the soil gas collection extension tube 12 flows through the soil gas delivery tube 121, the lower end flow matching tube 164, the soil gas sample storage bottle 13, the upper end flow matching tube 163 and the negative pressure driven connecting tube 1650 in sequence, and finally enters the interior of the negative pressure driven vacuum tank 165.

[0098] When the soil gas flows through the soil gas sample storage bottle 13, it will be trapped and stored in the soil gas sample storage bottle 13 to form a soil gas sample;

[0099] The storage bottle integrated disc 162 is driven by a conventional servo motor fixed to the negative pressure drive support base 161 through a gear transmission to rotate around a vertical axis. The storage bottle integrated disc 162 carries multiple soil vapor sample storage bottles 13 and rotates with it, so that the next adjacent soil vapor sample storage bottle 13 is coaxially aligned with the upper end flow matching tube 163 and the lower end flow matching tube 164. The soil vapor sample storage bottle 13 can be replaced to facilitate the storage of a new soil vapor sample. Multiple soil vapor samples can be analyzed collaboratively to reduce analytical errors.

[0100] Example 5:

[0101] On the basis of Example 3, Figure 6 As shown, the water sample slow sampling drive mechanism 23 includes a slow sampling temporary storage shell 231 fixed in the groundwater sampling housing 21 and extending vertically. A slow sampling drive piston 232 is slidably connected in the slow sampling temporary storage shell 231. The slow sampling drive piston 232 divides the interior of the slow sampling temporary storage shell 231 into a slow sampling water sample chamber 2301 and a slow sampling vacuum chamber 2302.

[0102] A slow sampling input pipe 2311 and a slow sampling output pipe 2312 connected to the slow sampling water sample chamber 2301 are fixed to the outside of the slow sampling temporary storage shell 231, and the groundwater delivery pipe 220 is connected to the slow sampling input pipe 2311;

[0103] A vacuum drive input pipe 2313 and a vacuum drive output pipe 2314 connected to the slow extraction vacuum chamber 2302 are fixed to the outside of the slow extraction temporary storage shell 231;

[0104] A slow-pumping driven vacuum tank 233 and a slow-pumping driven high-pressure tank 234 are fixed in the groundwater sampling housing 21. The slow-pumping driven vacuum tank 233 has a vacuum tank input pipe 2331 and a vacuum tank output pipe 2332 connected to the interior thereof. The slow-pumping driven high-pressure tank 234 has a high-pressure tank input pipe 2341 and a high-pressure tank output pipe 2342 connected to the interior thereof. A slow-pumping driven air pump 235 is fixed in the groundwater sampling housing 21.

[0105] The vacuum drive output pipe 2314 is connected to the vacuum tank input pipe 2331, the vacuum tank output pipe 2332 is connected to the input end of the slow-production drive air pump 235, the output end of the slow-production drive air pump 235 is connected to the high-pressure tank input pipe 2341, and the high-pressure tank output pipe 2342 is connected to the vacuum drive input pipe 2313;

[0106] The slow extraction input pipe 2311, the slow extraction input pipe 2311, the vacuum drive input pipe 2313, the vacuum drive output pipe 2314, the vacuum tank input pipe 2331, the vacuum tank output pipe 2332, the high-pressure tank input pipe 2341, and the high-pressure tank output pipe 2342 are all equipped with electronically controlled valves for controlling on and off.

[0107] like Figure 6 As shown, a horizontally arranged sampling support partition 212 is fixed in the groundwater sampling accommodating tube shell 21, a sampling bottle support ring 241 with an axis arranged in the vertical direction is fixed on the top of the sampling support partition 212, a sampling bottle support shaft 242 coaxially arranged therewith is rotatably connected in the sampling bottle support ring 241, a sampling bottle receiving disc 243 is fixed on the top of the sampling bottle supporting shaft 242, and the outer side of the sampling bottle receiving disc 243 has a plurality of sampling bottle clamping constraint holes 244 extending radially therefrom, and the groundwater sample storage bottle 24 is clamped and fixed in the sampling bottle clamping constraint holes 244;

[0108] A horizontally arranged sampling injection support beam 245 is fixed in the groundwater sampling housing 21. A sampling injection support slide rail 246 is fixed to the lower side of the sampling injection support slide rail 246. A sampling injection support slider 247 is movably connected to the lower side of the sampling injection support slider 246. A sampling injection syringe 248 is fixed to the lower side of the sampling injection support slider 247. The sampling injection syringe 248 is connected to the slow sampling output tube 2312 through a pipeline.

[0109] The sampling injection support slider 247 is driven by a prior art servo motor fixed on the sampling injection support beam 245 through a gear rack transmission to move along the sampling injection support slide rail 246.

[0110] Example 6:

[0111] This embodiment describes a soil gas and groundwater integrated sampling method, which is based on a soil gas and groundwater integrated sampling device according to the above-mentioned embodiment 5. The difference from embodiment 4 is that, in step S3, the slow sampling input pipe 2311, the slow sampling input pipe 2311, the vacuum drive input pipe 2313, the vacuum drive output pipe 2314, the vacuum tank input pipe 2331, the vacuum tank output pipe 2332, the high-pressure tank input pipe 2341, and the high-pressure tank output pipe 2342 are all controlled by electronically controlled valves.

[0112] During the groundwater extraction phase, the slow extraction input pipe 2311 is in the open state, the slow extraction output pipe 2312 is in the closed state, the vacuum drive input pipe 2313 is in the closed state, the vacuum drive output pipe 2314 is in the open state, the vacuum tank input pipe 2331 is in the open state, the vacuum tank output pipe 2332 is in the closed state, the high-pressure tank input pipe 2341 is in the closed state, and the high-pressure tank output pipe 2342 is in the closed state;

[0113] Under the vacuum effect inside the slow-collection drive vacuum tank 233, the slow-collection drive piston 232 slides upward inside the slow-collection temporary storage shell 231, thereby increasing the volume of the slow-collection water sample chamber 2301 and reducing the volume of the slow-collection vacuum chamber 2302. Groundwater is then input into the slow-collection water sample chamber 2301 through the groundwater sampling input pipe 22 and the groundwater delivery pipe 220, and the increase rate of the slow-collection water sample chamber 2301 volume is controlled at 200 ml / min, thereby avoiding excessive disturbance of the groundwater body during the collection process.

[0114] Then, during the groundwater pumping stage, the slow extraction input pipe 2311 is in a closed state, the slow extraction output pipe 2312 is in an open state, the vacuum drive input pipe 2313 is in an open state, the vacuum drive output pipe 2314 is in a closed state, the vacuum tank input pipe 2331 is in a closed state, the vacuum tank output pipe 2332 is in a closed state, the high-pressure tank input pipe 2341 is in a closed state, and the high-pressure tank output pipe 2342 is in an open state;

[0115] The compressed air in the slow sampling drive high pressure tank 234 enters the slow sampling vacuum chamber 2302 through the high pressure tank output pipe 2342 and the vacuum drive input pipe 2313. Driven by the compressed air, the slow sampling drive piston 232 slides downward in the slow sampling temporary storage shell 231, so that the volume of the slow sampling water sample chamber 2301 decreases and the volume of the slow sampling vacuum chamber 2302 increases. The groundwater in the slow sampling water sample chamber 2301 is transported to the sampling injection syringe 248 through the slow sampling output pipe 2312, and the sampling injection support slider 247 is opened. The servo motor of the prior art fixed on the sampling injection support beam 245 is driven by a gear rack transmission to move along the sampling injection support slide rail 246. The sampling injection support slider 247 drives the sampling injection syringe 248 to move toward the groundwater sample storage bottle 24. The bottle mouth of the groundwater sample storage bottle 24 is sealed by a rubber stopper, so that the needle part of the sampling injection syringe 248 passes through the rubber stopper of the bottle mouth of the groundwater sample storage bottle 24, and then the groundwater is injected into the groundwater sample storage bottle 24.

[0116] During the air pressure reset stage, the slow extraction input pipe 2311 is in a closed state, the slow extraction output pipe 2312 is in a closed state, the vacuum drive input pipe 2313 is in a closed state, the vacuum drive output pipe 2314 is in a closed state, the vacuum tank input pipe 2331 is in a closed state, the vacuum tank output pipe 2332 is in an open state, the high-pressure tank input pipe 2341 is in an open state, and the high-pressure tank output pipe 2342 is in an open state;

[0117] Start the slow production drive vacuum pump 235 to transfer the air in the slow production drive vacuum tank 233 to the slow production drive high-pressure tank 234, so that the slow production drive vacuum tank 233 always maintains a negative pressure state, that is, 0.1 times the standard atmospheric pressure; the slow production drive high-pressure tank 234 always maintains a high pressure state, that is, 3 times higher than the standard atmospheric pressure.

Claims

1. A soil gas and groundwater integrated sampling device, wherein a sampling shaft (102) connected to groundwater is drilled on the ground, characterized in that: It comprises a soil gas sampling mechanism (10) placed vertically into the sampling shaft (102), and a groundwater sampling mechanism (20) is provided at the lower end of the soil gas sampling mechanism (10); The soil gas sampling mechanism (10) comprises a soil gas sampling housing (11) extending vertically, a soil gas sampling extension hole (110) extending radially inwardly and outwardly from the side wall of the soil gas sampling housing (11), a soil gas sampling extension tube (12) slidingly connected radially inside the soil gas sampling housing (11), and the soil gas sampling extension tube (12) is connected to a soil gas sample storage bottle (13) via a soil gas delivery tube (121); The sliding direction of the soil gas collection extension tube (12) is consistent with the axial direction of the soil gas collection extension hole (110); the end of the soil gas collection extension tube (12) close to the soil gas collection extension hole (110) is a pointed end; and the outer side wall of the end of the soil gas collection extension tube (12) close to the soil gas collection extension hole (110) is provided with a plurality of soil gas input holes (120) communicating with each other inside and outside; The groundwater sampling mechanism (20) comprises a groundwater sampling accommodating tube shell (21) fixed at the lower end of the soil gas sampling accommodating tube shell (11); the bottom of the groundwater sampling accommodating tube shell (21) is provided with a vertically penetrating sampling input tube connection hole (211); a groundwater sampling input tube (22) is slidably connected to the sampling input tube connection hole (211) in a vertical direction; the upper end of the groundwater sampling input tube (22) is connected to a water sample slow sampling drive mechanism (23) through a groundwater delivery pipe (220); and the water sample slow sampling drive mechanism (23) is connected to a plurality of groundwater sample storage bottles (24).

2. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: An outward drive support beam (17) extending radially thereof is fixed to the inner side wall of the soil gas sampling accommodating tube shell (11); an outward drive support slide rail (171) is fixed to the outward drive support beam (17); an outward drive support slider (172) is slidably connected to the outward drive support slide rail (171); and the soil gas sampling outward tube (12) is fixed to the outward drive support slider (172).

3. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: A local sealing mechanism (14) is provided on the outside of the soil gas sampling accommodating tube shell (11), and the local sealing mechanism (14) comprises two local sealing accommodating ring grooves (141) provided on the outside of the soil gas sampling accommodating tube shell (11), a local sealing fixing ring (142) is fixed in the local sealing accommodating ring grooves (141), a local sealing sliding ring (143) is slidably connected in the local sealing accommodating ring grooves (141), and a closed expansion ring (144) is fixed between the local sealing fixing ring (142) and the local sealing sliding ring (143); A partially closed expansion chamber (140) is formed between the end of the partially closed fixed ring (142) and the partially closed sliding ring (143) that are close to each other, the inner side of the closed expansion ring (144), and the side wall of the partially closed accommodating ring groove (141). A partially closed control ring shell (145) is fixed on the inner side of the soil gas sampling accommodating tube shell (11). The interior of the partially closed control ring shell (145) is connected to the interior of the partially closed expansion chamber (140) through a closed control connecting hole (1450). A partially closed driving pump (146) is fixed in the soil gas sampling accommodating tube shell (11). The output end of the partially closed driving pump (146) is connected to the interior of the partially closed control ring shell (145) through a pipeline.

4. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: An external hole opening and closing mechanism (15) is provided in the soil gas sampling accommodating tube shell (11) at the soil gas sampling external hole (110); a spherical matching annular groove (150) coaxially arranged with the soil gas sampling external hole (110) is provided on the inner side of the soil gas sampling external hole (110); the external hole opening and closing mechanism (15) comprises an external opening and closing control ball (151) spherically contact-fitted in the spherical matching annular groove (150); and the external opening and closing control ball (151) has an external opening and closing matching hole (152) extending along its diameter. A vertically extending ball rotation support shaft (153) is fixed to the top and bottom of the outwardly extending opening and closing control ball (151), and an outwardly extending opening and closing support seat (154) is fixed to the inner side wall of the soil gas sampling accommodating tube shell (11) and located on the upper and lower sides of the soil gas collection outwardly extending hole (110). The outwardly extending opening and closing support seat (154) has a vertically penetrating ball rotation connection hole (1540), and the ball rotation support shaft (153) is rotatably engaged in the ball rotation connection hole (1540).

5. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: The soil gas sample storage bottle (13) is a vertically through double-bottle mouth structure, and is connected to the soil gas sample storage bottle (13) and provided with a soil gas negative pressure driving mechanism (16). The soil gas negative pressure driving mechanism (16) comprises a negative pressure driving support seat (161) fixed on the inner side wall of the soil gas sampling and containing tube shell (11), and a storage bottle integrated disc (162) with a vertically extending axis is rotatably connected to the negative pressure driving support seat (161). The outer edge of the storage bottle integrated disc (162) is provided with a plurality of vertically extending storage bottle clamping grooves (1620), and the soil gas sample storage bottle (13) is clamped and fixed in each storage bottle clamping groove (1620); The inner top and the inner bottom of the soil gas sample storage bottle (13) are both provided with a storage bottle one-way valve (130), and the conduction direction of the storage bottle one-way valve (130) is from bottom to top; The top and bottom of the storage bottle integrated disc (162) are respectively provided with an upper drive circulation hole (1621) and a lower drive circulation hole (1622) extending vertically and communicating with the storage bottle clamping groove (1620); the upper drive circulation hole (1621) and the lower drive circulation hole (1622) are respectively communicated with the upper end and the lower end of the soil gas sample storage bottle (13); An upper circulation matching tube (163) and a lower circulation matching tube (164) extending vertically are fixed on the negative pressure driving support seat (161) and on the upper and lower sides of the storage bottle integrated disc (162), respectively. The lower end of the upper circulation matching tube (163) contacts and matches the top of the storage bottle integrated disc (162), and the upper end of the lower circulation matching tube (164) contacts and matches the bottom of the storage bottle integrated disc (162). The lower end of the upper end circulation matching tube (163) is connected to the upper end driving circulation hole (1621), and the upper end of the lower end circulation matching tube (164) is connected to the lower end driving circulation hole (1622); A negative pressure driven vacuum tank (165) is fixed in the soil gas sampling housing (11), and the negative pressure driven vacuum tank (165) is connected to the upper end of the upper end flow matching tube (163) through a negative pressure driven connecting tube (1650), and a negative pressure driven control valve (1651) is provided on the negative pressure driven connecting tube (1650); The soil gas transport pipe (121) is connected to the lower end of the lower end flow matching pipe (164).

6. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: A vertically extending input pipe lifting support slide rail (25) is fixed on the inner side wall of the groundwater sampling accommodating tube shell (21); an input pipe lifting support slider (251) is slidably connected to the input pipe lifting support slide rail (25); and the input pipe lifting support slider (251) is fixedly connected to the groundwater sampling input pipe (22).

7. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: The water sample slow sampling drive mechanism (23) comprises a slow sampling temporary storage shell (231) fixed in the groundwater sampling and containing tube shell (21) and vertically extending, a slow sampling drive piston (232) being slidably connected in the slow sampling temporary storage shell (231), and the slow sampling drive piston (232) divides the interior of the slow sampling temporary storage shell (231) into a slow sampling water sample chamber (2301) and a slow sampling vacuum chamber (2302); A slow sampling input pipe (2311) and a slow sampling output pipe (2312) connected to the slow sampling water sample chamber (2301) are fixed on the outside of the slow sampling temporary storage shell (231), and the groundwater delivery pipe (220) is connected to the slow sampling input pipe (2311); A vacuum drive input pipe (2313) and a vacuum drive output pipe (2314) connected to the slow extraction vacuum chamber (2302) are fixed on the outside of the slow extraction temporary storage shell (231); A slow-sampling driven vacuum tank (233) and a slow-sampling driven high-pressure tank (234) are fixed in the groundwater sampling accommodating tube shell (21); the slow-sampling driven vacuum tank (233) is provided with a vacuum tank input pipe (2331) and a vacuum tank output pipe (2332) connected to the interior thereof; the slow-sampling driven high-pressure tank (234) is provided with a high-pressure tank input pipe (2341) and a high-pressure tank output pipe (2342) connected to the interior thereof; and a slow-sampling driven air pump (235) is fixed in the groundwater sampling accommodating tube shell (21); The vacuum drive output pipe (2314) is connected to the vacuum tank input pipe (2331), the vacuum tank output pipe (2332) is connected to the input end of the slow extraction drive air pump (235), the output end of the slow extraction drive air pump (235) is connected to the high-pressure tank input pipe (2341), and the high-pressure tank output pipe (2342) is connected to the vacuum drive input pipe (2313).

8. The soil gas and groundwater integrated sampling device according to claim 1, characterized in that: A horizontally arranged sampling support baffle (212) is fixed in the groundwater sampling accommodating tube shell (21), a sampling bottle support ring (241) whose axis is arranged in a vertical direction is fixed on the top of the sampling support baffle (212), a sampling bottle support shaft (242) coaxially arranged therewith is rotatably connected in the sampling bottle support ring (241), a sampling bottle receiving disc (243) is fixed on the top of the sampling bottle supporting shaft (242), a plurality of sampling bottle clamping constraint holes (244) extending radially are provided on the outer side of the sampling bottle receiving disc (243), and the groundwater sample storage bottle (24) is clamped and fixed in the sampling bottle clamping constraint hole (244); A horizontally arranged sampling injection support beam (245) is fixed in the groundwater sampling accommodating tube shell (21); a sampling injection support slide rail (246) is fixed on the lower side of the sampling injection support slide rail (246); a sampling injection support slider (247) is movably connected to the lower side of the sampling injection support slider (246); a sampling injection syringe (248) is fixed on the lower side of the sampling injection support slider (247); and the sampling injection syringe (248) is connected to the slow sampling output tube (2312) through a pipeline. The sampling injection support slider (247) is driven by a prior art servo motor fixed on the sampling injection support beam (245) through a gear rack transmission to move along the sampling injection support slide rail (246).

9. A soil gas and groundwater integrated sampling method, based on the soil gas and groundwater integrated sampling device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Drilling and equipment installation: A sampling shaft (102) connected to groundwater is drilled on the ground, and the entire soil gas sampling mechanism (10) and the groundwater sampling mechanism (20) are hoisted and placed into the sampling shaft (102), with the groundwater sampling mechanism (20) being located below the soil gas sampling mechanism (10), and the lower end of the groundwater sampling input pipe (22) being immersed in groundwater; S2. Soil gas sampling: The soil gas collection extension tube (12) is inserted into the soil through the soil gas collection extension hole (110), and the soil gas enters the interior of the soil gas collection extension tube (12) through the soil gas input hole (120), and then is introduced into the soil gas sample storage bottle (13) through the soil gas delivery tube (121) for storage; S3. Groundwater sampling: Under the driving of the water sample slow sampling driving mechanism (23), groundwater is sucked into the groundwater sampling input pipe (22), and under the pumping action of the water sample slow sampling driving mechanism (23), the groundwater sample is transported to the groundwater sample storage bottle (24) for storage.

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