A groundwater drilling sampling device

Abstract

The present invention relates to the technical field of drilling sampling, and discloses a groundwater drilling sampling device, including a mobile frame, characterized in that it also includes: a barrel, which is vertically installed on the top of the mobile frame; a U-shaped frame, which is fixedly installed on the top of the mobile frame, a hydraulic telescopic rod is fixedly installed on the top of the U-shaped frame, and a first motor is arranged below the horizontal side of the U-shaped frame; a sampling ring, which is fixedly installed on the top of the barrel, and four inner cavities evenly distributed in an annular shape are opened inside the sampling ring; a sampling assembly, which is arranged inside the barrel and inside the four inner cavities. The present invention can continuously sample groundwater, and the sampled groundwater can be temporarily stored each time sampling is performed. In addition, in four consecutive sampling processes, groundwater of different depths can be sampled, which avoids the situation that samples sampled from the same height are not representative during sampling, thereby improving the sampling effect of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of drilling sampling, and in particular to a groundwater drilling sampling device. Background Art

[0002] Groundwater drilling sampling is a method of obtaining groundwater samples through drilling technology. This method is usually used to obtain deep groundwater samples in order to analyze and study the water quality of groundwater, the migration and distribution of groundwater pollutants, as well as the process of chemical analysis, pollution detection or hydrogeological research.

[0003] The current groundwater drilling sampling device can only take samples once at a time, and does not have the function of sampling groundwater at different depths during sampling, resulting in the sample being unrepresentative, reducing the effect of groundwater sampling. Therefore, there is an urgent need to design a groundwater drilling sampling device. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a groundwater drilling sampling device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A groundwater drilling sampling device, comprising a mobile frame, characterized in that it also includes:

[0007] Barrel, which is installed vertically on the top of the mobile frame;

[0008] A U-shaped frame, the U-shaped frame is fixedly installed on the top of the mobile frame, a hydraulic telescopic rod is fixedly installed on the top of the U-shaped frame, a first motor is arranged below the horizontal side of the U-shaped frame, the telescopic end of the hydraulic telescopic rod passes through the U-shaped frame and is fixedly installed on the top of the first motor, and a drill rod is vertically installed at the output end of the first motor;

[0009] The sampling ring is fixedly installed on the top of the barrel, and four inner cavities evenly distributed in an annular shape are opened inside the sampling ring;

[0010] A sampling assembly, the sampling assembly is arranged inside the barrel and inside the four inner cavities, and the sampling assembly is used to extract groundwater into the inner cavity;

[0011] A mobile component, the mobile component is arranged on the top of the sampling ring and the sampling component, and the mobile component is used to enable the sampling component to sample groundwater at different locations for sampling;

[0012] The driving assembly is arranged above the barrel and is used to drive the sampling assembly and the moving assembly to work.

[0013] As a further technical solution of the present invention, the sampling component includes: a ring channel, which is horizontally arranged inside the barrel, and the top of the ring channel is fixedly connected to the top of the barrel through a fixed column, and four connecting pipes evenly distributed in a ring shape are fixedly installed on the top of the ring channel, and the ends of the four connecting pipes all pass through the top of the ring channel, and a second one-way valve is installed on each connecting pipe.

[0014] As a further technical solution of the present invention, a sleeve is vertically arranged inside the barrel, and the end of the sleeve passes through the barrel and the movable frame. A bellows is installed at the end of the sleeve, and a first one-way valve is installed at the end of the sleeve. A hollow rod is slidably sleeved inside the sleeve, and an annular groove is opened at the bottom of the ring channel. The top surface of the hollow rod is slidably installed inside the groove of the ring channel, and an L-shaped column is fixedly installed on the surface of the sleeve. The vertical side surface of the L-shaped column passes through the top of the barrel, and the vertical side surface of the L-shaped column is slidably arranged in the top surface of the barrel, and the hollow rod can be connected with the connecting pipe.

[0015] As a further technical solution of the present invention, a limit plate is horizontally arranged at the center above the sampling ring, and a folding groove is opened on the surface of the limit plate. The folding groove consists of a lower holding segment, two movable segments and an upper holding segment. The two movable segments are connected end to end with the lower holding segment and the upper holding segment. A U-shaped column is rotatably installed on the top of the limit plate, and the end of the vertical side corresponding to the U-shaped column is fixedly installed on the top of the barrel.

[0016] As a further technical solution of the present invention, a horizontally arranged piston plate is slidably installed inside each inner cavity, a connecting plate is vertically fixedly installed on the top of each piston plate, the surface of the connecting plate is slidably arranged inside the top surface of the sampling ring, a first sliding column is horizontally rotatably installed on the inner side of each connecting plate, and the surfaces of the four first sliding columns are slidably installed inside the folding groove.

[0017] As a further technical solution of the present invention, four air outlet pipes evenly distributed in a ring shape are vertically installed on the top of the sampling ring, the four air outlet pipes are connected to the four inner cavities respectively, a sampling tube is fixedly installed on the surface of the sampling ring, a solenoid valve is installed on the sampling tube, the four sampling tubes are connected to the four inner cavities respectively, and the top of the vertical side of the L-shaped column is rotatably installed at the bottom center of the limit plate.

[0018] As a further technical solution of the present invention, the moving component includes: a limiting ring, which is fixedly installed on the top of the sampling ring, and an inner wall of the limiting ring is provided with an inclined groove, the inclined groove is connected from beginning to end, and a second sliding column is horizontally rotatedly installed on the vertical side surface of the L-shaped column, and the end surface of the second sliding column is slidably installed inside the inclined groove.

[0019] As a further technical solution of the present invention, the driving assembly includes: a first belt, the first belt is horizontally rotatably arranged on the top of the limit plate, and first pulleys are provided at both ends of the first belt, one of the first pulleys is rotatably sleeved on the vertical side surface corresponding to the U-shaped column, the first pulley is fixedly installed on the top of the limit plate, and a column is vertically fixedly installed on the top of the barrel, and another first pulley is rotatably sleeved on the surface of the column.

[0020] As a further technical solution of the present invention, the vertical sides of the column and the L-shaped column are fixedly sleeved with second pulleys, the surfaces of the two second pulleys are sleeved with second belts, and the surface of the column is rotatably sleeved with two first gears, which are respectively fixedly installed on the bottom of the corresponding first pulley and the corresponding second pulley.

[0021] As a further technical solution of the present invention, a mounting plate is horizontally fixedly sleeved on the surface of the column, a driving motor is vertically installed on the top of the mounting plate, a connecting column is vertically installed on the output shaft of the driving motor, a first missing gear and a second missing gear are fixedly sleeved on the connecting column, and the first missing gear and the second missing gear are staggered. When the first missing gear contacts the first gear above, the first missing gear and the first gear above are meshed, and when the second missing gear contacts the first gear below, the second missing gear and the first gear below are meshed.

[0022] The beneficial effects of the present invention are:

[0023] Firstly, the present invention can continuously sample groundwater through the arrangement of the sampling component, the moving component and the driving component, and the sampled groundwater can be temporarily stored each time the sampling is performed. In addition, in the four consecutive sampling processes, groundwater at different depths can be sampled, thereby avoiding the situation that the samples sampled from the same height are not representative during sampling, thereby improving the sampling effect of the device;

[0024] Secondly, the present invention, through the arrangement of the sampling component and the driving component, can first make the second missing gear and the corresponding first gear meshing, so as to drive the sleeve to move in the vertical direction while rotating. When the hollow rod and the connecting pipe are connected, the second missing gear and the corresponding first gear are separated, and the first missing gear and the corresponding first gear are meshing, so as to drive the limit plate to rotate, so that the piston plate moves in the vertical direction, so that the groundwater can be pumped into the inner cavity for temporary storage, and continuous sampling can be carried out in sequence, thereby improving the sampling efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a groundwater drilling sampling device proposed by the present invention;

[0026] Figure 2 A schematic diagram of the cross-sectional structure of a barrel of a groundwater drilling sampling device proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the bottom view of the barrel structure of a groundwater drilling sampling device proposed by the present invention;

[0028] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0029] Figure 5 This is a schematic diagram of the structure of a groundwater drilling sampling device proposed by the present invention after removing the barrel;

[0030] Figure 6 for Figure 5 A magnified schematic diagram of part B;

[0031] Figure 7 A schematic diagram of the side cross-sectional structure of a sampling ring of a groundwater drilling sampling device proposed by the present invention;

[0032] Figure 8 The present invention provides a schematic diagram of the top cross-sectional structure of a sampling ring of a groundwater drilling sampling device.

[0033] In the figure: 1, barrel; 2, sampling ring; 3, limit ring; 4, limit plate; 5, lower holding section; 6, moving section; 7, upper holding section; 8, column; 9, connecting plate; 10, first sliding column; 11, casing; 12, hollow rod; 13, first one-way valve; 14, L-shaped column; 15, sampling tube; 16, first belt; 17, second belt; 18, driving motor; 19, ring channel; 20, connecting pipe; 21, second one-way valve; 22, air outlet pipe; 25, first pulley; 26, second pulley; 27, first gear; 28, first missing gear; 29, second missing gear; 30, connecting column; 31, inner cavity; 32, piston plate; 33, inclined groove; 34, second sliding column; 35, moving frame; 36, U-shaped frame; 37, hydraulic telescopic rod; 38, first motor; 39, drill pipe; 40, bellows. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Please see attached Figure 1 -Attached Figure 8A groundwater drilling sampling device includes a mobile frame 35, and also includes: a barrel 1, a U-shaped frame 36, a sampling ring 2, a sampling assembly, a mobile assembly and a driving assembly. The barrel 1 is vertically installed on the top of the mobile frame 35, and the U-shaped frame 36 is fixedly installed on the top of the mobile frame 35. A hydraulic telescopic rod 37 is fixedly installed on the top of the U-shaped frame 36. A first motor 38 is arranged below the horizontal side of the U-shaped frame 36. The telescopic end of the hydraulic telescopic rod 37 passes through the U-shaped frame 36 and is fixedly installed on the top of the first motor 38. The output of the first motor 38 A drill rod 39 is vertically installed at the outlet end, a sampling ring 2 is fixedly installed on the top of the barrel 1, four inner chambers 31 evenly distributed in an annular shape are opened inside the sampling ring 2, a sampling assembly is arranged inside the barrel 1 and inside the four inner chambers 31, the sampling assembly is used to extract groundwater into the inner chamber 31, a moving assembly is arranged on the top of the sampling ring 2 and on the sampling assembly, the moving assembly is used to enable the sampling assembly to take groundwater at different positions, and a driving assembly is arranged above the barrel 1, the driving assembly is used to drive the sampling assembly and the moving assembly to work;

[0037] As described above, groundwater can be sampled continuously, and the sampled groundwater can be temporarily stored each time the sampling is performed. In addition, groundwater at different depths can be sampled during four consecutive sampling processes.

[0038] Please see attached Figure 1 -Attached Figure 8In a preferred embodiment, the sampling assembly includes: a ring channel 19, the ring channel 19 is horizontally arranged inside the barrel 1, the top of the ring channel 19 is fixedly connected to the top of the barrel 1 through a fixing column, four annular evenly distributed connecting pipes 20 are fixedly installed on the top of the ring channel 19, the ends of the four connecting pipes 20 all pass through the top of the ring channel 19, and each connecting pipe 20 is installed with a second one-way valve 21, a sleeve 11 is vertically arranged inside the barrel 1, and the end of the sleeve 11 passes through the barrel 1 and the moving frame 35, and the sleeve 11 The end is connected with a bellows 40, the end of the sleeve 11 is installed with a first non-return valve 13, the sleeve 11 is slidably sleeved with a hollow rod 12, the bottom of the ring 19 is provided with an annular groove, the top surface of the hollow rod 12 is slidably installed inside the groove of the ring 19, the surface of the sleeve 11 is fixedly installed with an L-shaped column 14, the vertical side surface of the L-shaped column 14 passes through the top of the barrel 1, and the vertical side surface of the L-shaped column 14 is slidably arranged in the top surface of the barrel 1, the hollow rod 12 can be connected with the connecting pipe 20, and the center above the sampling ring 2 A limit plate 4 is arranged horizontally, and a folding groove is provided on the surface of the limit plate 4. The folding groove is composed of a lower holding section 5, two moving sections 6 and an upper holding section 7. The two moving sections 6 are connected end to end with the lower holding section 5 and the upper holding section 7. A U-shaped column is rotatably installed on the top of the limit plate 4, and the end of the vertical side corresponding to the U-shaped column is fixedly installed on the top of the barrel 1. A horizontally arranged piston plate 32 is slidably arranged inside each inner cavity 31, and a connecting plate 9 is vertically fixedly installed on the top of each piston plate 32. The surface of the connecting plate 9 is slidably arranged on the top of the sampling ring 2 Inside the surface, a first slide column 10 is horizontally rotatably installed on the inner side of each connecting plate 9, and the surfaces of the four first slide columns 10 are slidably installed inside the folding groove. Four annular evenly distributed air outlet pipes 22 are vertically installed on the top of the sampling ring 2, and the four air outlet pipes 22 are respectively connected to the four inner cavities 31. A sampling tube 15 is fixedly installed on the surface of the sampling ring 2, and a solenoid valve is installed on the sampling tube 15. The four sampling tubes 15 are respectively connected to the four inner cavities 31. The top of the vertical side of the L-shaped column 14 is rotatably installed at the bottom center of the limit plate 4;

[0039] Preferably, when the hollow rod 12 and the casing 11 are located under different inner cavities 31 , the heights of the casing 11 are all different, so that groundwater at different depths in the hole drilled by the drill rod 39 can be sampled.

[0040] Please refer to the attached Figure 2 -Attached Figure 6 In a preferred embodiment, the moving assembly includes: a limiting ring 3, the limiting ring 3 is fixedly installed on the top of the sampling ring 2, the inner wall of the limiting ring 3 is provided with an inclined groove 33, the inclined groove 33 is connected end to end, the vertical side surface of the L-shaped column 14 is horizontally rotated with a second sliding column 34, and the end surface of the second sliding column 34 is slidably installed inside the inclined groove 33;

[0041] Specifically, the first sliding column 10 moves inside the inclined groove 33 to drive the L-shaped column 14 to move up and down while rotating.

[0042] Please see attached Figure 1 -Attached Figure 8 In a preferred embodiment, the driving assembly includes: a first belt 16, the first belt 16 is horizontally rotatably arranged on the top of the limiting disk 4, and first pulleys 25 are provided at both ends of the first belt 16, one of the first pulleys 25 is rotatably sleeved on the vertical side surface corresponding to the U-shaped column, and the first pulley 25 is fixedly installed on the top of the limiting disk 4, and a column 8 is vertically fixedly installed on the top of the barrel 1, and another first pulley 25 is rotatably sleeved on the surface of the column 8, and the vertical sides of the column 8 and the L-shaped column 14 are fixedly sleeved with second pulleys 26, and the surfaces of the two second pulleys 26 are sleeved with second belts 17, and the surface of the column 8 is rotatably sleeved with two first gears 27, and the two first The gears 27 are fixedly mounted on the bottom of the corresponding first pulley 25 and the corresponding second pulley 26, respectively. A mounting plate is fixedly sleeved on the surface of the column 8 horizontally, and a driving motor 18 is vertically mounted on the top of the mounting plate. A connecting column 30 is vertically mounted on the output shaft of the driving motor 18. A first missing gear 28 and a second missing gear 29 are fixedly sleeved on the connecting column 30. The first missing gear 28 and the second missing gear 29 are staggered. When the first missing gear 28 contacts the upper first gear 27, the first missing gear 28 meshes with the upper first gear 27. When the second missing gear 29 contacts the lower first gear 27, the second missing gear 29 meshes with the lower first gear 27.

[0043] Furthermore, the piston plate 32 and the hollow rod 12 do not rotate simultaneously, and the piston plate 32 moves only when the hollow rod 12 reaches below the corresponding inner cavity 31, thereby achieving sampling from the drilled hole.

[0044] The working principle of the present invention is as follows: first, the mobile frame 35 is moved to a suitable position, and then a hole is drilled at a suitable position by means of the hydraulic telescopic rod 37, the first motor 38 and the drill rod 39, and then the bellows 40 is stretched and placed in the drilled hole. When it is necessary to sample the groundwater inside the drilled hole, the connecting column 30 is driven to rotate by the driving motor 18, and the rotation of the connecting column 30 drives the first missing gear 28 and the second missing gear 29 to rotate. When the second missing gear 29 is meshed with the first gear 27 below, the first missing gear 28 and the first missing gear 29 above are meshed. The gear 27 is not meshed, and the second missing gear 29 rotates to drive the first gear 27 below to rotate. The rotation of the first gear 27 below drives the second belt 17 and the second pulley 26 to rotate. The rotation of the second pulley 26 drives the L-shaped column 14 to rotate. Due to the arrangement of the second sliding column 34 and the inclined groove 33, the L-shaped column 14 will also move in the vertical direction according to the inclined groove 33 when rotating (when the hollow rod 12 and the sleeve 11 are located under different inner cavities 31, the height of the sleeve 11 is different, and it can be carried out at different depths in the hole). Sampling), the L-shaped column 14 rotates to drive the sleeve 11 to revolve, the sleeve 11 rotates to drive the hollow rod 12 to rotate, the hollow rod 12 rotates to connect with the connecting pipe 20 (the first one-way valve 13 and the second one-way valve 21 are both in a closed state), at this time, the second missing gear 29 and the first gear 27 below are no longer engaged, and when the first missing gear 28 and the first gear 27 above are engaged, the first missing gear 28 rotates to drive the first gear 27 above to rotate, and the first gear 27 above rotates to drive the first belt 16 and the first pulley 25 to rotate The first pulley 25 rotates to drive the limit plate 4 to rotate, and the limit plate 4 rotates to drive the upper retaining section 7, the moving section 6 and the lower retaining section 5 to rotate, so that the first sliding column 10 can move along the folding groove as a path, and the piston plate 32 and the connecting plate 9 in the inner cavity 31 where the connecting pipe 20 connected to the hollow rod 12 is located will move upward (the first one-way valve 13 and the second one-way valve 21 are in an open state), so that the groundwater can be pumped into the inner cavity 31 (when the piston plate 32 no longer moves upward, the first one-way valve 13 and the second one-way valve 21 are closed);

[0045] When the driving motor 18 continues to work, the hollow rod 12 and the sleeve 11 will be transferred to the subsequent workstation. When the corresponding first sliding column 10 moves to the corresponding moving section 6, the corresponding solenoid valve is opened at the same time, so that the groundwater in the inner cavity 31 with groundwater is taken out from the sampling tube 15. At this time, the first sliding column 10 will move downward, and the downward movement of the first sliding column 10 will drive the connecting plate 9 and the piston plate 32 to move downward, so as to discharge the groundwater, which is convenient for the staff to detect;

[0046] In summary, during continuous sampling, sampling can be performed from different depths in the drilled hole, thereby improving the sampling accuracy of the device.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A groundwater drilling sampling device, comprising a mobile frame (35), characterized in that: Also includes: A barrel (1), wherein the barrel (1) is vertically mounted on the top of the movable frame (35); A U-shaped frame (36), wherein the U-shaped frame (36) is fixedly mounted on the top of the mobile frame (35), a hydraulic telescopic rod (37) is fixedly mounted on the top of the U-shaped frame (36), a first motor (38) is arranged below the horizontal side of the U-shaped frame (36), a telescopic end of the hydraulic telescopic rod (37) passes through the U-shaped frame (36) and is fixedly mounted on the top of the first motor (38), and a drill rod (39) is vertically mounted on the output end of the first motor (38); A sampling ring (2), wherein the sampling ring (2) is fixedly mounted on the top of the barrel (1), and the sampling ring (2) is provided with four inner cavities (31) evenly distributed in an annular shape; A sampling assembly, the sampling assembly being arranged inside the barrel (1) and inside the four inner cavities (31), and the sampling assembly being used to extract groundwater into the inner cavities (31); A moving component, the moving component is arranged on the top of the sampling ring (2) and on the sampling component, and the moving component is used to enable the sampling component to sample groundwater at different locations; A driving assembly, the driving assembly being arranged above the barrel (1) and being used to drive the sampling assembly and the moving assembly to work; The sampling assembly comprises: a ring channel (19), wherein the ring channel (19) is horizontally arranged inside the barrel (1), the top of the ring channel (19) is fixedly connected to the top of the barrel (1) via a fixing column, four connecting pipes (20) evenly distributed in an annular shape are fixedly installed on the top of the ring channel (19), the ends of the four connecting pipes (20) all pass through the top of the ring channel (19), and each connecting pipe (20) is installed with a second one-way valve (21), and a sleeve (11) is vertically arranged inside the barrel (1), the end of the sleeve (11) passes through the barrel (1) and the movable frame (35), and the end of the sleeve (11) is connected to the movable frame (35). A bellows (40) is installed, a first non-return valve (13) is installed at the end of the sleeve (11), a hollow rod (12) is slidably sleeved inside the sleeve (11), an annular groove is opened at the bottom of the annular channel (19), the top surface of the hollow rod (12) is slidably installed inside the groove of the annular channel (19), an L-shaped column (14) is fixedly installed on the surface of the sleeve (11), the vertical side surface of the L-shaped column (14) passes through the top of the barrel (1), and the vertical side surface of the L-shaped column (14) is slidably arranged in the top surface of the barrel (1), the hollow rod (12) can be connected with the connecting pipe (20), and the moving component comprises: A limiting ring (3), the limiting ring (3) is fixedly mounted on the top of the sampling ring (2), an inner wall of the limiting ring (3) is provided with an inclined groove (33), the inclined groove (33) is connected end to end, a second sliding column (34) is horizontally rotatably mounted on the vertical side surface of the L-shaped column (14), the end surface of the second sliding column (34) is slidably mounted inside the inclined groove (33), the driving component comprises: a first belt (16), the first belt (16) is horizontally rotatably arranged on the top of the limiting plate (4), first pulleys (25) are arranged at both ends of the first belt (16), one of the first pulleys (25) is rotatably sleeved on the U The vertical side surface of the L-shaped column corresponds to the first pulley (25), which is fixedly installed on the top of the limit plate (4). A column (8) is vertically fixedly installed on the top of the barrel (1). Another first pulley (25) is rotatably sleeved on the surface of the column (8). The vertical sides of the column (8) and the L-shaped column (14) are both fixedly sleeved with second pulleys (26). The surfaces of the two second pulleys (26) are sleeved with second belts (17). Two first gears (27) are rotatably sleeved on the surface of the column (8). The two first gears (27) are respectively fixedly installed on the bottom of the corresponding first pulley (25) and the corresponding second pulley (26).

2. A groundwater drilling sampling device according to claim 1, characterized in that: A limit plate (4) is horizontally arranged at the center above the sampling ring (2); a folding groove is provided on the surface of the limit plate (4); the folding groove is composed of a lower holding section (5), two movable sections (6) and an upper holding section (7); the two movable sections (6) are connected end to end with the lower holding section (5) and the upper holding section (7); a U-shaped column is rotatably mounted on the top of the limit plate (4); and the end of the vertical side corresponding to the U-shaped column is fixedly mounted on the top of the barrel (1).

3. A groundwater drilling sampling device according to claim 2, characterized in that: A piston plate (32) is horizontally arranged and slides inside each of the inner cavities (31); a connecting plate (9) is vertically fixedly installed on the top of each of the piston plates (32); the surface of the connecting plate (9) is slidably arranged inside the top surface of the sampling ring (2); a first sliding column (10) is horizontally rotatably installed on the inner side of each of the connecting plates (9); and the surfaces of the four first sliding columns (10) are slidably installed inside the folding groove.

4. A groundwater drilling sampling device according to claim 3, characterized in that: Four air outlet pipes (22) evenly distributed in a ring shape are vertically mounted on the top of the sampling ring (2), and the four air outlet pipes (22) are respectively connected to four inner cavities (31). A sampling tube (15) is fixedly mounted on the surface of the sampling ring (2), and a solenoid valve is mounted on the sampling tube (15). The four sampling tubes (15) are respectively connected to the four inner cavities (31). The top of the vertical side of the L-shaped column (14) is rotatably mounted at the bottom center of the limit plate (4).

5. A groundwater drilling sampling device according to claim 4, characterized in that: A mounting plate is fixedly sleeved horizontally on the surface of the column (8), a driving motor (18) is vertically mounted on the top of the mounting plate, a connecting column (30) is vertically mounted on the output shaft of the driving motor (18), a first missing gear (28) and a second missing gear (29) are fixedly sleeved on the connecting column (30), the first missing gear (28) and the second missing gear (29) are staggered, the first missing gear (28) is meshed with a first gear (27) located at the bottom of the first pulley (25), and the second missing gear (29) is meshed with the first gear (27) located at the bottom of the second pulley (26).

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