A groundwater sampling device at different depths for groundwater investigation

Abstract

The present invention provides a groundwater sampling device of different depths for groundwater investigation, and the groundwater sampling device of different depths for groundwater investigation comprises a ring frame, a mounting seat, a collection tube, a limit assembly, an adjustment assembly and a pulling frame. The groundwater sampling device of different depths for groundwater investigation provided by the present invention opens the limit assembly at a single collection tube by adjusting the assembly, so that when the pulling frame moves upward, it can independently drive the collection tube at the loosened limit assembly to move upward, so that the collection tube is separated from the bottom cover, so that the water sample flows into the collection tube. After the sampling is completed, the pulling frame moves downward, and drives the collection tube to be stored on the bottom cover again, so as to achieve the sealing of the collection tube. At the same time, the depth of the sampling device is adjusted again, and the limit assembly on the corresponding collection tube is opened in sequence by adjusting the assembly, and the corresponding collection tube is opened by the pulling frame for sampling. The sampling of multiple depth levels is completed in sequence, the operation is convenient, and the sampling efficiency on site is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of detection sampling equipment, and in particular relates to a groundwater sampling device at different depths for groundwater investigation. Background Art

[0002] Groundwater pollution monitoring refers to the monitoring and determination of the types, concentrations and changing trends of harmful substances in groundwater, the evaluation and grasp of groundwater pollution, and the understanding of groundwater quality and pollution development trends. In the process of groundwater monitoring, it is necessary to sample groundwater and then test the sampled samples to evaluate and investigate the current state of groundwater. In order to ensure the accuracy of the survey data, it is necessary to sample water sources at different depths during the sampling operation. However, the current sampler needs to repeatedly sample multiple times according to the sampling depths during the sampling process, which is complicated to operate and will disturb the groundwater, affecting the sampling quality and efficiency of groundwater. Summary of the invention

[0003] The embodiment of the present invention provides a groundwater sampling device at different depths for groundwater investigation, aiming to solve the problem that the groundwater sampler in the prior art is complicated to operate during sampling at different depths, which affects the sampling quality and efficiency.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a groundwater sampling device at different depths for groundwater investigation, comprising:

[0005] Ring rack;

[0006] There are multiple mounting seats, the multiple mounting seats are evenly spaced along the circumference of the annular frame, and a bottom cover is installed on the top of the mounting seat;

[0007] A collection tube is detachably mounted on the bottom cover, and a sealing gasket for sealingly connecting with the collection tube is mounted on the bottom cover;

[0008] A limit assembly, installed between the collecting tube and the bottom cover, and used to control the connection state between the collecting tube and the bottom cover;

[0009] An adjustment component, disposed between the annular frame and the limit component, and used to control the working state of the limit components of the plurality of mounting seats;

[0010] A pulling frame is installed above the annular frame, and a top cover for connecting to the top port of the collection tube is installed on the pulling frame. An exhaust structure is provided on the top cover, and a buffer component for pulling the top cover to move toward the pulling frame is also provided between the top cover and the pulling frame.

[0011] In a possible implementation, the limiting component includes:

[0012] A sliding block is arranged on the mounting seat for radial sliding along the annular frame, the bottom cover is mounted on the sliding block, and the adjustment assembly is used for adjusting the position of the sliding block on the mounting seat;

[0013] A tilting block is fixedly mounted on the bottom of the mounting seat, wherein the bottom surface of the tilting block is tilted upward in a direction away from the axis of the annular frame;

[0014] The guide frame is slidably arranged on the bottom cover and the collecting tube in a vertical direction, the top end of the guide frame overlaps the collecting tube, and the bottom end abuts against the bottom of the tilting block.

[0015] In a possible implementation, the adjustment component includes:

[0016] A turntable, rotatably disposed on the annular frame and coaxially disposed with the annular frame;

[0017] A raised ring is installed on the top surface of the turntable, and two rollers are rotatably provided on the bottom surface of the sliding block. The raised ring is clamped between the two rollers, and a pushing rib is provided on the raised ring to transition outward. When the pushing rib moves between the two rollers, the sliding block moves outwardly guided by the pushing rib.

[0018] In a possible implementation, a moving block is mounted on the turntable, the pushing rib is mounted on the moving block, and the position of the moving block on the turntable has a degree of freedom of adjustment along the radial direction of the turntable.

[0019] In a possible implementation, a guide rib is further installed on the top of the moving block, the inner diameter and outer diameter of the guide rib are the same as the inner diameter and outer diameter of the raised ring, and the guide rib and the push rib are spaced apart along the radial direction of the turntable.

[0020] In a possible implementation, the number of the moving blocks corresponds to the number of the mounting seats, and the plurality of moving blocks can be synchronously rotated to below the sliding blocks on the plurality of mounting seats.

[0021] In a possible implementation, the buffer component includes:

[0022] A pulling member, mounted on the pulling frame;

[0023] A pulling rod is arranged through the pulling member and is slidably arranged on the pulling member in a vertical direction, and the top cover is installed on the pulling member;

[0024] An elastic member is installed between the pulling member and the pulling rod, and is used for pushing the pulling rod to move upward.

[0025] In a possible implementation, the pulling frame is provided with an open groove which is arranged radially along the annular frame in the length direction, the opening of the open groove is located outside the pulling frame, and the pulling member is slidably arranged inside the open groove.

[0026] In one possible implementation, an exhaust hole is provided on the side wall of the top cover, the inner end of the exhaust hole is a conical hole, a sealing ball for sealing the conical hole is provided inside the conical hole, and a pushing member for pushing the sealing ball to move into the conical hole is installed on the top cover.

[0027] In a possible implementation, an adjusting rod is rotatably provided on the moving block, a length direction of the adjusting rod is arranged along a radial direction of the rotating disk, and the adjusting rod is threadedly connected to the rotating disk.

[0028] Compared with the prior art, the scheme shown in the embodiment of the present application is provided with an annular frame, a plurality of mounting seats are installed on the annular frame, a top cover is installed on the top of the mounting seat, the collection tube is a cylindrical structure, the top of the collection tube is threadedly connected to the top cover, the bottom of the collection tube is slidably arranged inside the bottom cover, and can be against the sealing pad inside the bottom cover to achieve the sealing inside the collection tube. In the present application, when in use, the sampling device can be placed at the specified depth of the water source to be used. The limiting assembly at a single collection tube is opened by adjusting the assembly, so that when the pulling frame moves upward, it can independently drive the collection tube at the loosened limiting assembly to move upward, so that the collection tube is separated from the bottom cover, so that the water sample flows into the collection tube. After the sampling is completed, the pulling frame moves downward, and the collection tube is re-driven to be stored on the bottom cover to achieve the sealing of the collection tube. At the same time, the depth of the sampling device is adjusted again, and the limiting assembly on the corresponding collection tube is opened in sequence by adjusting the assembly, and the corresponding collection tube is opened by the pulling frame for sampling. Sampling at multiple depth levels is completed in sequence, which is convenient to operate and improves the sampling efficiency on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a groundwater sampling device at different depths for groundwater investigation provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of a limiter assembly provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the structure of an adjustment component provided by an embodiment of the present invention;

[0032] Figure 4 A schematic structural diagram of a buffer assembly provided in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Ring frame; 2. Mounting seat; 3. Collection tube; 31. Bottom cover; 32. Top cover; 321. Sealing ball; 322. Pushing member; 4. Limiting assembly; 41. Sliding block; 42. Tilting block; 43. Guide frame; 5. Adjustment assembly; 51. Turntable; 52. Raised ring; 53. Pushing rib; 54. Moving block; 541. Adjusting rod; 55. Guide rib; 6. Pulling frame; 7. Buffer assembly; 71. Pulling member; 72. Pulling rod; 73. Elastic member. DETAILED DESCRIPTION

[0035] 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 intended to limit the present invention.

[0036] Please also read Figures 1 to 4 The groundwater sampling device with different depths for groundwater investigation provided by the present invention is now described. The groundwater sampling device with different depths for groundwater investigation comprises a ring frame 1, a mounting seat 2, a collection tube 3, a limit assembly 4, an adjustment assembly 5 and a pulling frame 6. There are multiple mounting seats 2, and the multiple mounting seats 2 are evenly spaced along the circumference of the annular frame 1, and a bottom cover 31 is installed on the top of the mounting seat 2; the collecting tube 3 is detachably mounted on the bottom cover 31, and a sealing gasket for sealing connection with the collecting tube 3 is installed on the bottom cover 31; the limiting component 4 is installed between the collecting tube 3 and the bottom cover 31, and is used to control the connection state between the collecting tube 3 and the bottom cover 31; the adjustment component 5 is arranged between the annular frame 1 and the limiting component 4, and is used to control the working state of the upper limit component 4 of the multiple mounting seats 2; the pulling frame 6 is installed above the annular frame 1, and a top cover 32 for connecting the top port of the collecting tube 3 is installed on the pulling frame 6, and an exhaust structure is arranged on the top cover 32, and a buffer component 7 for pulling the top cover 32 to move toward the pulling frame 6 is also arranged between the top cover 32 and the pulling frame 6.

[0037] The groundwater sampling device for groundwater survey at different depths provided in this embodiment is provided with a ring frame 1, a plurality of mounting seats 2 are installed on the ring frame 1, a top cover 32 is installed on the top of the mounting seat 2, the collection tube 3 is a cylindrical structure, the top of the collection tube 3 is threadedly connected with the top cover 32, and the bottom of the collection tube 3 is slidably arranged inside the bottom cover 31, and can be against the sealing gasket inside the bottom cover 31 to achieve the sealing inside the collection tube 3. In this application, when in use, the sampling device can be placed at the specified depth of the water source to be used. The limit assembly 4 at a single collection tube 3 is opened by adjusting the assembly 5, so that when the pulling frame 6 moves upward, it can drive the collection tube 3 at the loosened limit assembly 4 to move upward alone, so that the collection tube 3 is separated from the bottom cover 31, so that the water sample flows into the collection tube 3. After the sampling is completed, the pulling frame 6 moves downward, and drives the collection tube 3 to be stored on the bottom cover 31 again, so as to achieve the sealing of the collection tube 3. At the same time, the depth of the sampling device is adjusted, the limiting components 4 on the corresponding collection tubes 3 are opened in sequence by adjusting the components 5, and the corresponding collection tubes 3 are opened by pulling the frame 6 to take samples. Sampling at multiple depth levels is completed in sequence, the operation is convenient, and the sampling efficiency on site is improved.

[0038] Specifically, in this embodiment, a control valve for discharging the sample inside the collection tube 3 is installed on the side wall of the bottom of the collection tube 3 .

[0039] Specifically, in this embodiment, a waterproof push rod is installed between the pulling frame 6 and the annular frame 1, and the waterproof push rod can push the pulling frame 6 to move upward relative to the annular frame 1. When the pulling frame 6 moves upward, it will drive the collection tube 3 that has released the limit assembly 4 to move upward together. The collection tube 3 that has not released the limit assembly 4 is always installed inside the bottom cover 31 to maintain a sealed effect due to the buffering effect of the buffer assembly 7. Thus, the operation of sampling with a single collection tube 3 is completed.

[0040] Preferably, in this embodiment, a gravity block is installed at the bottom of the annular frame 1, so that the sampling device can always maintain a vertical state during the sampling process.

[0041] In some embodiments, the above-mentioned limiter assembly 4 can be used as follows: Figure 1 , Figure 2 See also Figure 1 , Figure 2The limiting assembly 4 includes a sliding block 41, a tilting block 42 and a guide frame 43. The sliding block 41 is slidably arranged on the mounting seat 2 along the radial direction of the annular frame 1, and the bottom cover 31 is installed on the sliding block 41. The adjustment assembly 5 is used to adjust the position of the sliding block 41 on the mounting seat 2; the tilting block 42 is fixedly installed at the bottom of the mounting seat 2, and the bottom surface of the tilting block 42 is tilted upward in a direction away from the axis of the annular frame 1; the guide frame 43 is slidably arranged on the bottom cover 31 and the collection tube 3 along the vertical direction, and the top end of the guide frame 43 overlaps the collection tube 3, and the bottom end abuts against the bottom of the tilting block 42. The sliding block 41 is slidably arranged on the mounting seat 2, and the bottom cover 31 is installed on the sliding block 41. A first flange is installed on the bottom cover 31, and a second flange is installed on the collection tube 3. The guide frame 43 includes two vertical rods that penetrate the first flange and the second flange. The vertical rod is slidably arranged between the first flange and the second flange along the vertical direction. A cross bar is connected to the bottom of the two vertical poles, and a guide roller is rotatably arranged on the outside of the cross bar. The guide roller abuts against the bottom surface of the tilting block 42. Since the bottom surface of the tilting block 42 is an inclined surface, when the sliding block 41 drives the bottom cover 31 to move outward, it will drive the guide frame 43 to move outward together, so that the cross bar at the bottom of the guide frame 43 is separated from the inclined surface. After the cross bar is separated from the bottom surface of the tilting block 42, the collection tube 3 installed with the guide frame 43 can move upward, so that the bottom of the collection tube 3 is opened, and the structure is simple and the operation is convenient.

[0042] Specifically, in this embodiment, a limit block is installed at the top of the vertical pole for abutting against the top surface of the second flange on the collection tube 3. The limit block is threadedly connected to the vertical pole, so that the position of the limit block can be adjusted, and then the overall height of the guide frame 43 can be adjusted.

[0043] In some embodiments, the adjustment component 5 can be used as follows: Figure 1 , Figure 2 and Figure 3 The structure shown. Figure 1 , Figure 2 and Figure 3The adjustment assembly 5 includes a turntable 51 and a raised ring 52. The turntable 51 is rotatably arranged on the annular frame 1 and is coaxially arranged with the annular frame 1; the raised ring 52 is installed on the top surface of the turntable 51, and two rollers are rotatably arranged on the bottom surface of the sliding block 41. The raised ring 52 is clamped between the two rollers, and a push rib 53 is arranged on the raised ring 52 to transition outward. When the push rib 53 moves between the two rollers, the sliding block 41 moves outward under the guidance of the push rib 53. The turntable 51 is rotatably arranged in the middle of the annular frame 1, and the turntable 51 is coaxially arranged with the annular frame 1. A waterproof motor for driving the turntable 51 to rotate is also installed on the annular frame 1. A raised ring 52 is protrudingly arranged on the top of the turntable 51, and the raised ring 52 is coaxially arranged with the turntable 51. Two rollers are rotatably arranged at the bottom of the sliding block 41, and the axes of the two rollers are arranged in the vertical direction, and the two rollers are arranged at intervals along the radial direction of the turntable 51. The raised rib on the raised ring 52 is located between the two rollers. When the turntable 51 rotates, the raised rib guides the position between the two rollers, thereby guiding the position of the moving block 54. When the pushing rib 53 moves between the two rollers, since the pushing rib 53 is located on the outside, the moving block 54 can be guided to move outward. At the same time, the positions of the moving blocks 54 corresponding to the collection tubes 3 at other positions do not change due to the guidance of the raised ring 52. When the pulling frame 6 moves upward relative to the annular frame 1, only the sliding block 41 located at the pushing rib 53 moves outward, and the collection tube 3 located on this sliding block 41 can move upward and detach from the bottom cover 31 to perform sampling operations.

[0044] Specifically, in this embodiment, when the rotating disk 51 rotates in the same direction, the pushing ribs 53 can sequentially pass through the sealing pads corresponding to the multiple collection tubes 3. Thus, the multiple collection tubes 3 can be opened sequentially according to the on-site requirements to avoid sample confusion.

[0045] Specifically, in this embodiment, a connection end for installing the push rib 53 is provided in the middle of the raised rib on the raised ring 52, and the two ends of the push rib 53 are connected at the connection end. The raised rib and the push rib 53 adopt an arc transition to ensure that the two rollers can smoothly switch between the raised rib and the push rib 53.

[0046] In some embodiments, the turntable 51 may be Figure 3 See the structure shown. Figure 3, a moving block 54 is installed on the turntable 51, and a pushing rib 53 is installed on the moving block 54, and the position of the moving block 54 on the turntable 51 has the freedom to be adjusted along the radial direction of the turntable 51. A moving block 54 is installed on the turntable 51, and the moving block 54 is set on the turntable 51 to slide along the radial direction of the turntable 51. The pushing rib 53 is installed on the moving block 54, and the position of the pushing rib 53 can be adjusted by moving the moving block 54, and whether the pushing rib 53 is used to contact and guide the roller at the bottom of the sliding block 41 can be controlled. When a single or multiple collection tubes 3 do not need to be sampled, the position of the moving block 54 can be pushed and adjusted to disconnect the pushing rib 53 from the raised ring 52. Therefore, during the rotation of the turntable 51, the corresponding sliding block 41 can be prevented from moving outward, so that the operation of freely selecting the collection tube 3 can be achieved.

[0047] Specifically, in this embodiment, collection tubes 3 of different capacities are installed on the annular frame 1. According to the requirements of the sampling volume on site, a suitable collection tube 3 can be selected for sampling.

[0048] In some embodiments, the moving block 54 may be implemented as follows: Figure 3 See the structure shown. Figure 3 , a guide rib 55 is also installed on the top of the moving block 54, and the inner diameter and outer diameter of the guide rib 55 are the same as the inner diameter and outer diameter of the raised ring 52, and the guide rib 55 and the push rib 53 are arranged at intervals along the radial direction of the turntable 51. The guide rib 55 and the push rib 53 are arranged at intervals, and the push rib 53 is an arc-shaped structure as a whole. A gap for the roller to pass through is provided between the guide rib 55 and the push rib 53, and the guide rib 55 is located on the inner side of the push rib 53. When the moving block 54 moves outward, the two ends of the guide rib 55 are connected to the two ends of the raised rib on the raised ring 52. Thereby, the corresponding sliding block 41 can be guided to maintain the original position. The stability of the position of the corresponding sliding block 41 is ensured. When the moving block 54 moves inward, the two ends of the push rib 53 are connected to the two ends of the raised rib and guide the corresponding slider to move outward. When in use, the position of the corresponding moving block 54 can be freely adjusted according to the use situation. To ensure that when the turntable 51 is driven to rotate, the corresponding collection tube 3 can be opened accordingly.

[0049] Preferably, in this embodiment, in the adjustment state, the sliding block 41 and the moving block 54 are mutually staggered along the circumference of the rotating disk 51, so as to facilitate the adjustment of the position of the moving block 54. At the same time, there are four moving blocks 54 and four sliding blocks 41, and the rotating disk 51 rotates 45° as one movement cycle. Therefore, the position of the corresponding moving block 54 can be adjusted by determining the number of collecting tubes 3 and collecting tubes 3 to be used according to the amount of samples collected at the same height. When the rotating disk rotates until the moving block 54 moves to the bottom of the sliding block 41, the corresponding collecting tube 3 can be opened.

[0050] Specifically, in this embodiment, through the connection mode of the sliding block 41 and the rotating disk 51, a moving block 54 is installed on the rotating disk 51, and the pushing ribs 53 and the guide ribs 55 on the moving block 54 can switch the connection mode with the raised ring 52 by adjusting the position of the moving block 54. Therefore, when the rotating disk 51 rotates one step, the number of collection tubes 3 that can be opened at the same time can be determined. It can be freely adjusted according to the needs of on-site sampling, and it is more convenient and quick to use.

[0051] Preferably, in this embodiment, the two ends of the pushing rib 53 are connecting parts that are compatible with the curvature of the raised ring 52, and the middle part of the pushing rib 53 is a protruding part protruding outward. When the protruding part moves between the two rollers, it can push the sliding block 41 to move outward.

[0052] In some embodiments, the moving block 54 may be implemented as follows: Figure 1 , Figure 3 See also Figure 1 , Figure 3 , the number of moving blocks 54 corresponds to the number of mounting seats 2, and multiple moving blocks 54 can be synchronously rotated to the bottom of the sliding blocks 41 on multiple mounting seats 2. The number of moving blocks 54 is the same as that of mounting seats 2. Specifically, in this embodiment, on the same annular frame 1, the number of mounting seats 2 is four, and the four mounting seats 2 are evenly spaced along the circumference of the annular frame 1. On the same turntable 51, the number of moving blocks 54 is four, and the four moving blocks 54 are evenly spaced along the circumference of the turntable 51, and the turntable 51 is coaxially arranged with the annular frame 1. Therefore, when the turntable 51 is rotated to move the moving blocks 54 to the bottom of the mounting seats 2, the moving blocks 54 on the turntable 51 are respectively located below the corresponding mounting seats 2. And combined with the position of the pushing ribs 53 and the guide ribs 55 on the moving blocks 54. To control whether the collection tube 3 on the corresponding mounting seat 2 can be opened for collection. The collection tubes 3 can be opened one by one or multiple at the same time. Enhance the flexibility during use.

[0053] In some embodiments, the buffer assembly 7 may be configured as follows: Figure 4 The structure shown. Figure 4, the buffer assembly 7 includes a pulling member 71, a pulling rod 72 and an elastic member 73. The pulling member 71 is installed on the pulling frame 6; the pulling rod 72 is arranged through the pulling member 71 and is slidably arranged on the pulling member 71 in the vertical direction, and the top cover 32 is installed on the pulling member 71; the elastic member 73 is installed between the pulling member 71 and the pulling rod 72, and is used to push the pulling rod 72 to move upward. A mounting plate for mounting the pulling member 71 is installed on the pulling frame 6, and a plurality of pulling members 71 are evenly spaced along the circumference of the annular frame 1 on the mounting plate, and the number of the pulling members 71 corresponds to the number of the collecting tubes 3. A sleeve for mounting the pulling rod 72 is fixedly installed on the pulling member 71, and the elastic member 73 is installed inside the sleeve. A limit platform for mounting the elastic member 73 is protruding from the middle of the pulling rod 72, and one end of the elastic member 73 abuts on the limit platform, and the other end of the elastic member 73 abuts on the inside of the sleeve. A top cover 32 is installed at one end of the pull rod 72, and the top cover 32 is rotatably arranged at the end of the pull rod 72. A spherical rotating body is fixedly installed at the end of the top cover 32, and a spherical hole for installing the rotating body is provided at the end of the pull rod 72, so as to facilitate the adjustment of the position of the top cover 32 and the fixing of the top cover 32 to the collection tube 3.

[0054] Specifically, in this embodiment, when the limiting assembly 4 limits the collection tube 3 and prevents it from moving upward, the pulling frame 6 moves upward, which drives the pulling member 71 to move upward, and the pulling rod 72 slides inside the pulling member 71. The position of the collection tube 3 does not change. When the limiting assembly 4 is opened, the collection tube 3 can move upward relative to the bottom cover 31, the pulling frame 6 moves upward, drives the pulling member 71 to move upward, and under the support force of the elastic member 73, the pulling rod 72 is pulled upward, and the collection tube 3 is opened to collect samples.

[0055] Specifically, in this embodiment, the arrangement of the pulling rod 72 and the elastic member 73 also facilitates the installation of the top cover 32 onto the collecting tube 3 .

[0056] In some embodiments, the pulling frame 6 can be used as follows Figure 1 See the structure shown. Figure 1 The pulling frame 6 is provided with an open slot which is arranged along the radial direction of the annular frame 1 in the length direction, the opening of the open slot is located outside the pulling frame 6, and the pulling member 71 is slidably arranged inside the open slot. The length direction of the opening slot is arranged along the radial direction of the annular frame 1, the pulling member 71 is installed inside the open slot, and a guide wheel is rotatably arranged on the pulling member 71, and guide wheels are rollingly arranged on both the upper and lower sides of the pulling frame 6. The pulling member 71 can be conveniently moved on the pulling frame 6 by the guide wheel. At the same time, the setting of the open slot can facilitate the installation of the pulling member 71 on the pulling frame 6.

[0057] In some embodiments, the top cover 32 may be formed as follows: Figure 4 See the structure shown. Figure 4 , an exhaust hole is provided on the side wall of the top cover 32, the end inside the exhaust hole is a tapered hole, a blocking ball 321 for blocking the tapered hole is provided inside the tapered hole, and a pusher 322 for pushing the blocking ball 321 to move inside the tapered hole is installed on the top cover 32. An exhaust hole is provided on the side wall of the top cover 32, and the exhaust hole is connected to the inside of the top cover 32. The pusher 322 is a spring. In a free state, under the push of the pusher 322, the blocking ball 321 abuts against the inner wall of the tapered hole to block the tapered hole. When sampling, the collection tube 3 moves upward to separate from the bottom cover 31, and under the influence of air pressure, the blocking ball 321 moves to the outside of the tapered hole. Thereby, the gas inside the collection tube 3 is discharged to the outside from the exhaust hole, completing the sampling operation.

[0058] Preferably, in this embodiment, a handle is fixedly mounted on the blocking ball 321 for pulling the blocking ball 321 to move to the outside of the tapered hole, and one end of the handle is located outside the top cover 32. A drain valve for discharging the collected liquid is mounted on the side wall of the collection tube 3. When the drain valve is opened, the blocking ball 321 can be disengaged from the tapered hole by pulling the handle, thereby ensuring the smoothness of the discharge of the collected liquid.

[0059] In some embodiments, the moving block 54 may be implemented as follows: Figure 3 See the structure shown. Figure 3 , an adjusting rod 541 is rotatably arranged on the moving block 54, the length direction of the adjusting rod 541 is arranged along the radial direction of the rotating disk 51, and the adjusting rod 541 is threadedly connected to the rotating disk 51. A mounting hole for mounting the adjusting rod 541 is concavely arranged on the outer side surface of the moving block 54, one end of the adjusting rod 541 is a rotating end, and the outer diameter of the rotating end is larger than the outer diameter of the adjusting rod 541. A limiting surface for limiting the rotating end to move toward the axis direction of the rotating disk 51 is arranged at the bottom of the mounting hole, and a limiting member for limiting the rotating end to move away from the axis direction of the rotating disk 51 is also threadedly connected at the mouth of the mounting hole. A hexagonal hole for facilitating the rotation of the rotating end is concavely arranged at the end of the rotating end. A clearance hole for avoiding the insertion of a tool into the hexagonal hole is arranged on the limiting member. Thus, the rotating adjusting rod 541 is conveniently rotated on the moving block 54. The position of the adjusting rod 541 on the rotating disk 51 can be adjusted and changed by rotating the adjusting rod 541, and the position of the moving block 54 on the rotating disk 51 can be changed at the same time. Simple structure and easy operation.

[0060] Preferably, in this embodiment, a slide groove for the moving block 54 to slide is provided on the rotating disk 51 , the length direction of the slide groove is provided along the radial direction of the rotating disk 51 , and the moving block 54 is slidably provided inside the slide groove, so as to guide the moving block 54 to move on the rotating disk 51 .

[0061] 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 groundwater sampling device at different depths for groundwater investigation, characterized in that: include: Ring frame (1); A plurality of mounting seats (2), the plurality of mounting seats (2) being evenly spaced and arranged along the circumference of the annular frame (1), and a bottom cover (31) being installed on the top of the mounting seat (2); A collecting tube (3) is detachably mounted on the bottom cover (31), and a sealing gasket for sealingly connecting with the collecting tube (3) is mounted on the bottom cover (31); A limit assembly (4), installed between the collecting tube (3) and the bottom cover (31), and used to control the connection state between the collecting tube (3) and the bottom cover (31); An adjustment component (5) is arranged between the annular frame (1) and the limit component (4) and is used to control the working state of the upper limit components (4) of the plurality of mounting seats (2); A pulling frame (6) is installed above the annular frame (1), a top cover (32) for connecting to the top port of the collection tube (3) is installed on the pulling frame (6), an exhaust structure is provided on the top cover (32), and a buffer component (7) for pulling the top cover (32) to move toward the pulling frame (6) is also provided between the top cover (32) and the pulling frame (6); The limiting component (4) comprises: A sliding block (41) is arranged on the mounting seat (2) in a radially sliding manner along the annular frame (1), the bottom cover (31) is mounted on the sliding block (41), and the adjustment component (5) is used to adjust the position of the sliding block (41) on the mounting seat (2); A tilting block (42) is fixedly mounted on the bottom of the mounting seat (2), and the bottom surface of the tilting block (42) is tilted upward in a direction away from the axis of the annular frame (1); A guide frame (43) is slidably arranged on the bottom cover (31) and the collection tube (3) in a vertical direction, the top end of the guide frame (43) overlaps the collection tube (3), and the bottom end abuts against the bottom of the tilting block (42); The adjustment component (5) comprises: A rotating disk (51) is rotatably disposed on the annular frame (1) and is coaxially disposed with the annular frame (1); A raised ring (52) is mounted on the top surface of the rotating disk (51); two rollers are rotatably arranged on the bottom surface of the sliding block (41); the raised ring (52) is clamped between the two rollers; and a pushing rib (53) is arranged on the raised ring (52) to transition outwards; when the pushing rib (53) moves between the two rollers, the sliding block (41) is guided by the pushing rib (53) to move outwards; A moving block (54) is mounted on the rotating disk (51), the pushing rib (53) is mounted on the moving block (54), and the position of the moving block (54) on the rotating disk (51) has a degree of freedom of adjustment along the radial direction of the rotating disk (51); A guide rib (55) is also installed on the top of the moving block (54), the inner diameter and outer diameter of the guide rib (55) are the same as the inner diameter and outer diameter of the raised ring (52), and the guide rib (55) and the pushing rib (53) are arranged at intervals along the radial direction of the rotating disk (51); The buffer component (7) comprises: A pulling member (71) is mounted on the pulling frame (6); A pulling rod (72) is arranged to penetrate the pulling member (71) and is slidably arranged on the pulling member (71) in a vertical direction, and the top cover (32) is mounted on the pulling member (71); An elastic member (73) is installed between the pulling member (71) and the pulling rod (72) and is used to push the pulling rod (72) to move upward; An adjusting rod (541) is rotatably arranged on the moving block (54), the length direction of the adjusting rod (541) is arranged along the radial direction of the rotating disk (51), and the adjusting rod (541) is threadedly connected to the rotating disk (51).

2. The groundwater sampling device at different depths for groundwater investigation according to claim 1, characterized in that: The number of the moving blocks (54) corresponds to the number of the mounting seats (2) one by one, and the plurality of moving blocks (54) can be synchronously rotated to the bottom of the sliding blocks (41) on the plurality of mounting seats (2).

3. The groundwater sampling device at different depths for groundwater investigation according to claim 1, characterized in that: The pulling frame (6) is provided with an open groove which is arranged radially along the length direction of the annular frame (1), the opening of the open groove is located outside the pulling frame (6), and the pulling member (71) is slidably arranged inside the open groove.

4. The groundwater sampling device at different depths for groundwater investigation according to claim 1, characterized in that: An exhaust hole is provided on the side wall of the top cover (32), the inner end of the exhaust hole is a conical hole, a sealing ball (321) for sealing the conical hole is provided inside the conical hole, and a pushing member (322) for pushing the sealing ball (321) to move into the conical hole is installed on the top cover (32).

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