A groundwater sampling device for soil and groundwater detection

Abstract

The invention discloses a groundwater sampling device for soil and groundwater detection, which relates to the technical field of sampling devices and comprises: an inner cylinder for storing water samples, an outer cylinder for shielding and protecting the water inlet of the inner cylinder, and a base for inserting soil, wherein the bottom end of the inner cylinder is fixedly connected to the base, the bottom end of the outer cylinder is rotatably connected to the base, and the inner cylinder is arranged in the outer cylinder and rotatably connected to the outer cylinder, a water inlet one is provided through the outer surface of the outer cylinder, a filter screen for filtering sediment is fixedly provided in the water inlet one, and a mounting groove is provided at the top of the outer cylinder; in the invention, sediment can be effectively filtered and removed by the cooperation of components such as the filter screen and the scraper block, the filter screen is located at a water inlet and is used to filter sediment, and the scraper block scrapes off the sediment accumulated on the filter screen by rotating synchronously with the rotating cylinder, and the design of the block and the spring prevents sediment from entering the mounting groove during the removal process, thereby ensuring the cleanliness and normal function of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, in particular to groundwater sampling equipment for soil and groundwater detection. Background Art

[0002] Soil groundwater refers to the water that exists in the soil layer and the rocks beneath it. It forms a different water system from surface water. Groundwater sampling is the process of obtaining groundwater samples for analysis and evaluation. Its purpose is to determine the water quality, chemical composition, pollution status, etc. of groundwater for environmental monitoring, resource management and scientific research.

[0003] The Chinese patent with publication number CN221038217U discloses an integrated device for groundwater stratified sampling and rapid detection, the structure of which includes a shaft sleeve and a sampling assembly for stratified sampling, the sampling assembly including a ring plate, a tube and a handle, the inner side of the shaft sleeve is rotatably connected with a ring sleeve, the ring plate is slidably connected with the ring sleeve in the shaft sleeve, the top of the ring plate is fixedly connected with a handle, the axis of the ring plate is rotatably connected with a tube, and the bottom of the tube is connected with a conical rock breaking tube; the utility model can effectively prevent the sample from being contaminated during the sampling process;

[0004] The Chinese patent with the publication number CN116929845B discloses a groundwater sampling device for agricultural and forestry water system detection, whose structure includes a multi-section collection tube for water collection, which is connected to a self-priming pump, and the multi-section collection tube is limitedly installed on a positioning guide frame, and a vibration pushing device for pushing the multi-section collection tube is installed next to the positioning guide frame. The multi-section collection tube is formed by splicing an extrusion drill bit, a suction joint, a splicing pipe and a driving connector. The extrusion drill bit, the suction joint, the splicing pipe and the driving connector are all arranged on the same axis, and the connection points of the extrusion drill bit, the suction joint, the splicing pipe and the driving connector are all provided with connectors. Effectively ensure sampling efficiency while reducing sampling costs;

[0005] A Chinese patent with publication number CN218766131U discloses a groundwater sampler for geological exploration, whose structure includes a gantry support seat, one side of which is connected to a servo motor. In the utility model, the servo motor is used to drive the winding roller to transport the sampling tube into the sampling hole, and the controller is used to start the single-chip microcomputer, so that the single-chip microcomputer starts the battery, so that the electromagnet generates magnetism, attracts the blocking block to move vertically upward, and opens the water inlet to allow groundwater to flow into the sampling tube. When the water level rises to contact the water level sensor, the water level sensor sends an electrical signal to the single-chip microcomputer to cause the single-chip microcomputer to close the first battery opened in advance, so that the electromagnet loses magnetism and the blocking block moves vertically downward to block the water inlet. The filter screen filters impurities, and the positioning screw is rotated to remove the connecting frame for cleaning. The utility model can sample groundwater at different depths at one time, and can also filter impurities, and is highly practical.

[0006] However, the above-mentioned prior art has the following shortcomings: when sampling groundwater, although the silt in the groundwater is filtered through the filtering device, the filtered silt will remain at the water inlet. When there is too much silt, it may cause blockage to the water inlet of the device, resulting in a decrease in the sampling flow rate, affecting the sampling efficiency, and may also cause inaccurate sampling data. Summary of the invention

[0007] The purpose of the present invention is to provide a groundwater sampling device for soil groundwater detection in order to solve the problem that when sampling groundwater, although the silt in the groundwater is filtered through a filtering device, the filtered silt will remain at the water inlet. When there is too much silt, the water inlet of the device may be blocked, resulting in a decrease in the sampling flow rate, affecting the sampling efficiency, and may also cause inaccurate sampling data.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a groundwater sampling device for soil and groundwater detection, comprising: an inner cylinder for storing water samples, an outer cylinder for shielding and protecting the water inlet of the inner cylinder, and a base for inserting soil, wherein the bottom end of the inner cylinder is fixedly connected to the base, the bottom end of the outer cylinder is rotatably connected to the base, and the inner cylinder is arranged in the outer cylinder and rotatably connected to the outer cylinder, the outer surface of the outer cylinder is provided with a first water inlet, a filter screen for filtering sediment is fixedly arranged in the first water inlet, a mounting groove is provided at the top of the outer cylinder, a rotating cylinder is rotatably arranged in the mounting groove, a scraper block for scraping sediment outside the filter screen is fixedly connected to the top of the rotating cylinder, one side of the scraper block abuts against the filter screen, a second water inlet is provided at the outer surface of the inner cylinder, a guide column is fixedly arranged in the inner cylinder, a baffle is sleeved on the outer side of the guide column, the baffle is meshedly connected to the guide column, a guide groove for guiding groundwater to the bottom end of the baffle is provided on the inner wall of the inner cylinder, and the baffle is magnetically connected to the rotating cylinder;

[0009] Among them, when the outer cylinder rotates to connect water inlet one with water inlet two, groundwater enters the inner cylinder through water inlet one and water inlet two, and flows to the bottom end of the baffle through the guide groove. As the amount of water in the inner cylinder increases, the baffle rotates upward under the action of the guide column engaged with it, and drives the rotating cylinder to rotate synchronously, so that the scraper block scrapes off the mud and sand on the outside of the filter screen.

[0010] As a further solution of the present invention: a mounting plate is fixedly provided inside the water inlet, a spring is fixedly connected to one side of the mounting plate, one end of the spring is fixedly connected to a connecting plate, one side of the connecting plate is fixedly connected to a block that prevents mud and sand from entering the mounting groove, and one end of the block abuts against the filter screen.

[0011] As a further solution of the present invention: a ball is embedded in the outer wall of the rotating cylinder, and the ball is rotatably connected to the rotating cylinder.

[0012] As a further solution of the present invention: a connecting block is fixedly connected to the bottom end of the outer cylinder, a connecting groove is opened at the top end of the outer cylinder, a limiting block is fixedly connected in the connecting groove, and the outer cylinder is provided with multiple groups, and the connecting blocks at the bottom end of each group of outer cylinders are arranged in the connecting grooves at the top end of another group of outer cylinders, and are rotatably engaged with the limiting blocks.

[0013] As a further solution of the present invention: a connecting disk is arranged on the outer cylinder, a sleeve is arranged on the top of the connecting disk, a rotating push plate is fixedly connected to one side of the sleeve, a connecting block is also fixedly arranged on the bottom of the connecting disk, and the connecting disk is connected to a group of outer cylinders through the connecting block.

[0014] As a further solution of the present invention: the inner cylinders are provided with multiple groups, the bottom ends of two adjacent groups of inner cylinders are fixedly connected to the top ends, one group of inner cylinders is fixedly connected to the top end with a fixed plate, the top end of the fixed plate is fixedly connected to a connecting rod, one end of the connecting rod passes through the sleeve and is fixedly connected to a pressure plate.

[0015] As a further solution of the present invention: a drainage hole 1 is formed through a side end of the outer tube, and a drainage hole 2 is formed through one end of the inner tube.

[0016] As a further solution of the present invention: a guide hole is formed through the top of the baffle plate to discharge the accumulated water at the top of the baffle plate to the bottom of the baffle plate, a sleeve hole is formed through the top of the baffle plate, the guide column passes through the sleeve hole, a guide block is fixedly connected to the inner wall of the sleeve hole, and the guide block is meshingly connected to the guide column.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can effectively filter and remove sediment through the cooperation of the filter screen and the scraper block and other components. The filter screen is located at the water inlet and is used to filter the sediment. The scraper block scrapes the sediment accumulated on the filter screen by rotating synchronously with the rotating drum. The design of the block and the spring prevents the sediment from entering the installation groove during the removal process, ensuring the cleanliness and normal function of the equipment, thereby improving the working efficiency of the equipment;

[0019] 2. In the present invention, the baffle installed in the inner cylinder can move up and rotate when the water volume increases, thereby blocking the second water inlet and forming a relatively closed space. This sealing design prevents the external water flow from interfering with the water sample in the inner cylinder, ensuring the purity of the groundwater sample and the accuracy of collection. At the same time, the spiral guide groove stabilizes the movement trajectory of the baffle and avoids movement deviation;

[0020] 3. In the present invention, the outer cylinder can be stably connected or separated by cooperating with the connecting block, the connecting groove and the limit block. The water sample in the inner cylinder can be discharged by rotating the outer cylinder, and the operation steps are simplified, thereby improving work efficiency. In addition, the angle of the outer cylinder can be easily adjusted by rotating the push plate to achieve the connection or misalignment of water inlet one and water inlet two, thereby simplifying the operation process of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a groundwater sampling device for soil and groundwater detection according to the present invention;

[0022] Figure 2 It is a cross-sectional view of the overall structure of a groundwater sampling device for soil and groundwater detection according to the present invention;

[0023] Figure 3 It is a structural schematic diagram of a sleeve in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0024] Figure 4 It is a structural schematic diagram of a connecting rod in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the outer cylinder in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0026] Figure 6 The present invention is a groundwater sampling device for soil and groundwater detection. Figure 5 A schematic diagram of the structure at A;

[0027] Figure 7 It is a structural schematic diagram of an installation slot in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0028] Figure 8 It is a structural cross-sectional view of a connecting groove in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0029] Fig. 9 It is a structural schematic diagram of a rotating cylinder in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0030] Fig.10 It is a groundwater sampling device for soil and groundwater detection described in the present invention. Fig. 9 Schematic diagram of the structure at B;

[0031] Fig.11 It is a structural cross-sectional view of an inner cylinder in a groundwater sampling device for soil and groundwater detection according to the present invention;

[0032] Fig.12It is a structural schematic diagram of a baffle in a groundwater sampling device for soil and groundwater detection described in the present invention.

[0033] In the figure: 1, inner cylinder; 11, water inlet 2; 12, guide groove; 13, drain hole 2; 14, connecting rod; 15, pressure plate; 16, fixed plate; 2, base; 3, outer cylinder; 31, water inlet 1; 32, filter screen; 33, mounting groove; 34, rotating cylinder; 341, scraper block; 342, ball bearing; 35, mounting plate; 36, spring; 37, connecting plate; 38, stopper; 39, drain hole 1; 310, connecting block; 311, connecting groove; 312, limit block; 313, sleeve; 314, rotating push plate; 315, connecting plate; 4, guide column; 5, baffle; 51, sleeve hole; 52, guide block; 53, guide hole. DETAILED DESCRIPTION

[0034] 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.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0036] Reference Figures 1 to 8In an embodiment of the present invention, a groundwater sampling device for soil and groundwater detection includes: an inner cylinder 1 for storing water samples, an outer cylinder 3 for shielding and protecting the water inlet of the inner cylinder 1, and a conical base 2 for inserting into the soil, wherein the bottom end of the inner cylinder 1 is fixedly connected to the base 2, the bottom end of the outer cylinder 3 is rotatably connected to the base 2, and the inner cylinder 1 is arranged in the outer cylinder 3 and rotatably connected to the outer cylinder 3, the outer surface of the outer cylinder 3 is provided with a water inlet 31 through-through, the water inlet 31 is provided with two groups, symmetrically provided on both sides of the outer cylinder 3, each group of the water inlet 31 is fixedly provided with a filter screen 32 for filtering sediment, the top of the outer cylinder 3 is provided with a mounting groove 33, a rotating cylinder 34 is rotatably provided in the mounting groove 33, and the top of the rotating cylinder 34 A scraper block 341 is fixedly connected to scrape off the mud and sand outside the filter screen 32. Two groups of scraper blocks 341 are arranged and symmetrically distributed on the top of the rotating cylinder 34. One side of the scraper block 341 abuts against the filter screen 32, and the other side of the scraper block 341 is an arc surface. A water inlet 11 is provided through the outer surface of the inner cylinder 1. Two groups of water inlet 11 are arranged and symmetrically opened on both sides of the inner cylinder 1. A guide column 4 is fixedly arranged in the inner cylinder 1. A spiral guide groove is opened on the outer surface of the guide column 4. A baffle plate 5 is sleeved on the outer side of the guide column 4. The baffle plate 5 is meshed and connected with the guide column 4. A guide groove 12 is opened on the inner wall of the inner cylinder 1 to guide groundwater to the bottom end of the baffle plate 5. Magnets are embedded in the side end of the baffle plate 5 and the inner wall of the rotating cylinder 34, and the magnetic poles of the two magnets are opposite.

[0037] Among them, when the outer cylinder 3 rotates to connect the water inlet 1 31 with the water inlet 2 11, the groundwater enters the inner cylinder 1 through the water inlet 1 31 and the water inlet 2 11, and flows to the bottom end of the baffle 5 through the guide groove 12. As the amount of water in the inner cylinder 1 increases, the baffle 5 rotates upward under the action of the guide column 4 engaged with it, and drives the rotating cylinder 34 to rotate synchronously, so that the scraper block 341 scrapes the mud and sand on the outside of the filter screen 32.

[0038] Reference Figures 5 and 6 A mounting plate 35 is fixedly provided in the water inlet 31, and a spring 36 is fixedly connected to one side of the mounting plate 35, and one end of the spring 36 is fixedly connected to a connecting plate 37. Two groups of springs 36 are provided, which are symmetrically distributed on one side of the mounting plate 35, and one side of the connecting plate 37 is fixedly connected to a block 38 that prevents mud and sand from entering the mounting groove 33. The block 38 is A-shaped, and one end of the block 38 abuts against the filter screen 32. When the scraper block 341 rotates to the block 38, it abuts against the block 38 and pushes the block 38 to move, so that the spring 36 retracts to prevent the scraper block 341 from bringing mud and sand into the mounting groove 33 when it rotates, and after the block 38 and the scraper block 341 are misaligned, the block 38 is reset under the action of the spring 36 and abuts against the filter screen 32.

[0039] By adopting the above solution, the cooperation of the block 38 and the spring 36 and other components can prevent the mud and sand from entering the installation groove 33 when the scraper 341 rotates, avoiding accumulation and clogging inside the equipment, thereby keeping the installation groove 33 clean and functioning normally.

[0040] Reference Figures 9 and 10 The outer wall of the rotating cylinder 34 is embedded with balls 342, and the balls 342 are rotatably connected to the rotating cylinder 34. The inner wall of the rotating cylinder 34 is also embedded with balls 342. There are multiple groups of balls 342 evenly distributed on the outer wall and the inner wall of the rotating cylinder 34.

[0041] By adopting the above solution, the friction between the rotating cylinder 34 and its inner wall can be reduced by the ball 342. Due to the reduction of friction, the rotating cylinder 34 can rotate more smoothly and efficiently, which helps to improve the overall working efficiency of the equipment, so that the scraper block 341 can more smoothly remove the mud and sand on the filter screen 32.

[0042] Reference Figures 4 to 11 A drainage hole 39 is provided through the side end of the outer cylinder 3, a drainage hole 2 13 is provided through one end of the inner cylinder 1, and the drainage hole 2 13 is C-shaped. A connecting block 310 is fixedly connected to the bottom end of the outer cylinder 3, and the connecting block 310 is T-shaped. Two groups of connecting blocks 310 are provided, which are symmetrically distributed at the bottom end of the outer cylinder 3. A connecting groove 311 is provided at the top end of the outer cylinder 3. Two groups of connecting grooves 311 are provided, which are symmetrically distributed at the top end of the outer cylinder 3. Two groups of limit blocks 312 are fixedly connected in each group of connecting grooves 311. The two groups of limit blocks 312 are symmetrically distributed on both sides of the inner part of the connecting groove 311. The outer cylinder 3 is provided with multiple groups, and each group of connecting blocks 310 at the bottom end of the outer cylinder 3 is provided at another group of outer The top of the cylinder 3 is in the connecting groove 311, and is rotatably engaged with the limit block 312. There are multiple groups of inner cylinders 1, and the bottom ends of two adjacent groups of inner cylinders 1 are fixedly connected to the top. Each group of outer cylinders 3 is provided with a group of inner cylinders 1. When it is necessary to take out the groundwater sample in the inner cylinder 1, the corresponding group of outer cylinders 3 is rotated to make the connecting block 310 engaged with a group of limit blocks 312 in the connecting groove 311 on the outer cylinder 3 rotate until the connecting block 310 is engaged with another group of limit blocks 312 in the connecting groove 311. At this time, the drainage hole 1 39 on the outer cylinder 3 is connected to the drainage hole 2 13 on the inner cylinder 1 inside the outer cylinder 3, so that the groundwater sample in this inner cylinder 1 is discharged.

[0043] The above scheme is adopted: through the coordinated design of the connecting block 310, the connecting groove 311 and the limit block 312, different outer cylinders 3 can be stably connected or separated, thereby ensuring the stability and reliability of the equipment. The user can complete the connection or disconnection operation by rotating the outer cylinder 3, which simplifies the complicated operation steps and improves the work efficiency. By rotating the outer cylinder 3, the drainage hole 1 39 can be docked with the drainage hole 2 13 on the inner cylinder 1, so that the water samples in multiple groups of outer cylinders 3 can be discharged separately, which is convenient for subsequent operations.

[0044] Reference Figure 3 to Figure 4 The uppermost group of outer cylinders 3 is provided with a connecting disk 315, and a sleeve 313 is provided at the top of the connecting disk 315. A rotating push plate 314 is fixedly connected to one side of the sleeve 313. A connecting block 310 is also fixedly provided at the bottom of the connecting disk 315. The connecting disk 315 is connected to the uppermost group of outer cylinders 3 through the connecting block 310. The uppermost group of inner cylinders 1 is fixedly connected to a fixing disk 16. The uppermost group of inner cylinders 1 is fixedly connected to a connecting rod 14. One end of the connecting rod 14 passes through the sleeve 313 and is fixedly connected to a pressing plate 15. When the rotating push plate 314 is pushed to rotate, the connecting disk 315 can be driven to rotate. Since the multiple groups of connecting blocks 310 are respectively engaged with the multiple groups of limit blocks 312 on the same side, when the connecting disk 315 rotates, the multiple groups of outer cylinders 3 can be driven to rotate synchronously.

[0045] By adopting the above solution: the angle of the outer cylinder 3 can be easily adjusted by rotating the push plate 314, making the connection or misalignment of the water inlet 1 31 and the water inlet 2 11 easier. This design reduces the complexity of manual adjustment and improves the convenience and accuracy of operation.

[0046] Reference Fig.12 The top of the baffle 5 is provided with a guide hole 53 for draining the accumulated water at the top of the baffle 5 to the bottom of the baffle 5. There are four types of guide holes 53, which are evenly distributed at the top of the baffle 5. The top of the baffle 5 is provided with a sleeve hole 51. The guide column 4 passes through the sleeve hole 51. The inner wall of the sleeve hole 51 is fixedly connected with a guide block 52. The guide block 52 is meshed with a spiral guide groove on the outer surface of the guide column 4. The outer side of the baffle 5 abuts against the inner tube 1. The baffle 5 has good buoyancy and high The inner cylinder 1 is made of impact-resistant polyethylene foam material. When water enters the inner cylinder 1, it flows to the bottom of the baffle 5 through the guide groove 12 and the guide hole 53. As the amount of water in the inner cylinder 1 increases, the water in the inner cylinder 1 will push the baffle 5 to move upward. During the upward movement, the baffle 5 rotates under the action of the spiral guide grooves on the outer surfaces of the guide block 52 and the guide column 4 until the baffle 5 moves to the top of the inner cylinder 1, blocking the water inlet 11, so that a relatively closed space is formed in the inner cylinder 1.

[0047] The above scheme is adopted: the baffle 5 blocks the water inlet 11 during the upward movement, thereby forming a relatively closed space in the inner tube 1. The formation of this closed space helps to prevent external water flow interference and ensure the purity of the water sample in the inner tube 1. The baffle 5 is engaged with the spiral guide groove of the guide column 4, so that the baffle 5 can rotate according to a predetermined trajectory during the upward movement. This precise guiding design ensures the stability of the movement path of the baffle 5, prevents deviation, and improves the accuracy of sampling.

[0048] The working principle of the present invention is as follows: when in use, the positions of the multiple groups of outer cylinders 3 and the connecting plates 315 are first adjusted, so that the multiple groups of connecting blocks 310 are respectively engaged with the multiple groups of limit blocks 312 on the same side, and the water inlet 11 and the water inlet 1 31 are misaligned, and then the conical base 2 is inserted into the soil, and the device is pressed downward as a whole by the pressing plate 15 until the inner cylinder 1 and the outer cylinder 3 completely enter the groundwater layer, at this time, the multiple groups of outer cylinders 3 are driven to rotate synchronously by rotating the push plate 314, so that the water inlet 1 31 on the multiple groups of outer cylinders 3 are connected with the water inlet 2 11 on the corresponding inner cylinder 1. When the water inlet 1 31 is connected to the water inlet 2 11 on the inner cylinder 1, the water inlet 1 31 is connected to the water inlet 1 31 on the inner cylinder 1. When the water inlet 1 is connected to the water inlet 2 11, the groundwater is filtered through the filter screen 32 at the water inlet 1 31 to filter the sediment therein, and then flows into the inner cylinder 1, and through the guide groove 12 opened on the inner wall of the inner cylinder 1 and the guide hole 53 opened on the inner baffle 5 of the inner cylinder 1, the groundwater in the inner cylinder 1 flows to the bottom end of the baffle 5. As the amount of water in the inner cylinder 1 increases, the baffle 5 is pushed to move upward. During the upward movement, it rotates under the action of the spiral guide groove opened on the outer surface of the guide block 52 and the guide column 4. When the baffle 5 rotates, the magnet embedded between the side end of the baffle 5 and the inner wall of the rotating cylinder 34 causes the rotating cylinder 34 to rotate. The baffle plate 5 generates magnetic attraction, thereby driving the rotating cylinder 34 to rotate, so that the scraper block 341 contacts the outer side of the filter screen 32 and scrapes off the mud and sand attached to the filter screen 32. When the scraper block 341 rotates to the stopper 38, it pushes the stopper 38 to move and compresses the spring 36, thereby preventing the mud and sand from entering the installation groove 33 until the stopper 38 and the scraper block 341 are misaligned. The spring 36 resets the stopper 38. When the baffle plate 5 moves to the top of the inner cylinder 1, the water inlet 11 is blocked, so that a relatively closed space is formed in the inner cylinder 1, so that the groundwater sample is collected, and then the push plate 31 is rotated again. 4 rotates to make multiple groups of outer cylinders 3 rotate synchronously, so that the water inlet 2 11 and the water inlet 1 31 are misaligned again, and then the equipment is pulled out from the ground. When it is necessary to take out the groundwater sample in the inner cylinder 1, the corresponding group of outer cylinders 3 is rotated to make the connecting block 310 in the connecting groove 311 on the outer cylinder 3, which is engaged with a group of limit blocks 312, rotate until the connecting block 310 is engaged with another group of limit blocks 312 in the connecting groove 311. At this time, the drainage hole 1 39 on the outer cylinder 3 is connected with the drainage hole 2 13 on the inner cylinder 1 inside the outer cylinder 3, so that the groundwater sample in this inner cylinder 1 is discharged;The filter screen 32 and the scraper block 341 cooperate with each other to effectively filter and remove the silt. The filter screen 32 is located at the water inlet 1 31 and is used to filter the silt. The scraper block 341 rotates synchronously with the rotating cylinder 34 to scrape off the silt accumulated on the filter screen 32. The design of the block 38 and the spring 36 prevents the silt from entering the installation groove 33 during the removal process, thereby ensuring the cleanliness and normal function of the equipment, thereby improving the working efficiency of the equipment. The baffle 5 installed in the inner cylinder 1 can move up and rotate when the water volume increases, thereby covering the water inlet 2 11 to form a relatively closed space. This sealing design prevents The interference of external water flow on the water sample in the inner cylinder 1 is prevented, and the purity and accuracy of the underground water sample collection are ensured. At the same time, the spiral guide groove stabilizes the movement trajectory of the baffle 5 and avoids movement deviation. Through the cooperation of the connecting block 310, the connecting groove 311 and the limit block 312, the outer cylinder 3 can be stably connected or separated. By rotating the outer cylinder 3, the water sample in the inner cylinder 1 can be discharged, and the operation steps are simplified, and the work efficiency is improved. In addition, the angle of the outer cylinder 3 can be easily adjusted by rotating the push plate 314, and the connection or dislocation of the water inlet 1 31 and the water inlet 2 11 can be achieved, which simplifies the operation process of the equipment. ;

[0049] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A groundwater sampling device for soil and groundwater detection, comprising: An inner cylinder (1) for storing water samples, an outer cylinder (3) for shielding and protecting the water inlet of the inner cylinder (1), and a base (2) for inserting into soil, wherein the bottom end of the inner cylinder (1) is fixedly connected to the base (2), the bottom end of the outer cylinder (3) is rotatably connected to the base (2), and the inner cylinder (1) is arranged in the outer cylinder (3) and is rotatably connected to the outer cylinder (3), and is characterized in that a water inlet (31) is provided through the outer surface of the outer cylinder (3), a filter screen (32) for filtering sediment is fixedly provided in the water inlet (31), and a mounting groove (33) is provided at the top end of the outer cylinder (3), and a filter screen (32) for filtering sediment is fixedly provided in the mounting groove (33). A rotating cylinder (34) is rotatably arranged, a scraper block (341) for scraping off the mud and sand outside the filter screen (32) is fixedly connected to the top of the rotating cylinder (34), one side of the scraper block (341) is in contact with the filter screen (32), a water inlet second (11) is provided through the outer surface of the inner cylinder (1), a guide column (4) is fixedly arranged inside the inner cylinder (1), a baffle plate (5) is sleeved on the outer side of the guide column (4), the baffle plate (5) is meshingly connected with the guide column (4), a guide groove (12) for guiding groundwater to the bottom end of the baffle plate (5) is provided on the inner wall of the inner cylinder (1), and the baffle plate (5) is magnetically connected to the rotating cylinder (34); When the outer cylinder (3) rotates to connect the water inlet 1 (31) with the water inlet 2 (11), groundwater enters the inner cylinder (1) through the water inlet 1 (31) and the water inlet 2 (11), and flows to the bottom of the baffle (5) through the guide groove (12). As the amount of water in the inner cylinder (1) increases, the water in the inner cylinder (1) pushes the baffle (5) upward, so that the baffle (5) rotates upward under the action of the guide column (4) engaged with it, and drives the rotating cylinder (34) to rotate synchronously, so that the scraper (341) scrapes the mud and sand on the outside of the filter screen (32).

2. A groundwater sampling device for soil and groundwater detection according to claim 1, characterized in that: A mounting plate (35) is fixedly provided in the water inlet (31); a spring (36) is fixedly connected to one side of the mounting plate (35); a connecting plate (37) is fixedly connected to one end of the spring (36); a stopper (38) for preventing mud and sand from entering the mounting groove (33) is fixedly connected to one side of the connecting plate (37); and one end of the stopper (38) abuts against the filter screen (32).

3. A groundwater sampling device for soil and groundwater detection according to claim 2, characterized in that: A ball (342) is embedded in the outer wall of the rotating cylinder (34), and the ball (342) is rotatably connected to the rotating cylinder (34).

4. A groundwater sampling device for soil and groundwater detection according to claim 3, characterized in that: A connecting block (310) is fixedly connected to the bottom end of the outer cylinder (3), a connecting groove (311) is provided at the top end of the outer cylinder (3), a limiting block (312) is fixedly connected in the connecting groove (311), and a plurality of groups of outer cylinders (3) are provided, wherein the connecting block (310) at the bottom end of each group of outer cylinders (3) is arranged in the connecting groove (311) at the top end of another group of outer cylinders (3) and is rotatably engaged with the limiting block (312).

5. A groundwater sampling device for soil and groundwater detection according to claim 4, characterized in that: The outer cylinder (3) is provided with a connection disk (315), the top of the connection disk (315) is provided with a sleeve (313), one side of the sleeve (313) is fixedly connected to a rotating push plate (314), and the bottom of the connection disk (315) is also fixedly provided with a connection block (310), and the connection disk (315) is connected to a group of outer cylinders (3) via the connection block (310).

6. A groundwater sampling device for soil and groundwater detection according to claim 5, characterized in that: The inner cylinders (1) are provided in a plurality of groups, the bottom ends of two adjacent groups of inner cylinders (1) are fixedly connected to the top ends, the top end of one group of inner cylinders (1) is fixedly connected to a fixing plate (16), the top end of the fixing plate (16) is fixedly connected to a connecting rod (14), one end of the connecting rod (14) passes through the sleeve (313) and is fixedly connected to a pressing plate (15).

7. A groundwater sampling device for soil and groundwater detection according to claim 6, characterized in that: A first drainage hole (39) is formed through the side end of the outer tube (3), and a second drainage hole (13) is formed through one end of the inner tube (1).

8. A groundwater sampling device for soil and groundwater detection according to claim 7, characterized in that: The baffle (5) has a guide hole (53) formed through the top of the baffle (5) to discharge the accumulated water at the top of the baffle (5) to the bottom of the baffle (5). The baffle (5) has a sleeve hole (51) formed through the top of the baffle. The guide column (4) passes through the sleeve hole (51). The inner wall of the sleeve hole (51) is fixedly connected with a guide block (52). The guide block (52) is meshedly connected with the guide column (4).

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