Portable underground water fixed-depth sampling device

Abstract

The invention relates to the technical field of underground water sampling, in particular to a portable underground water fixed-depth sampling device which comprises a sampler and a storage box, a driving part is fixedly connected to the inner side wall of the storage box, a wire spool is coaxially and fixedly connected to an output shaft of the driving part, and a sampler wire is wound on the wire spool; one end, away from the wire spool, of the sampler wire is fixedly connected with the sampler; a wire hole is formed in the top wall of the storage box; a door frame is arranged on the outer wall of one side of the storage box; a box door is hinged in the door frame; the outer wall of one side of the storage box is fixedly connected with a connecting rod, and one end, close to the storage box, of the connecting rod is provided with a pay-off assembly used for placing the sampler into a wellhead; the end, away from the storage box, of the connecting rod is fixedly connected with a base. The base is provided with a supporting platform assembly used for supporting the whole device at a wellhead. The underground water monitoring device can be quickly unfolded and folded in the field or in a complex environment to quickly monitor underground water.

Description

Technical Field

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

[0002] In the field of environmental protection, regular monitoring of groundwater is an important means of assessing water quality, pollution sources and pollution levels. Groundwater fixed-depth sampling devices need to be able to meet the needs of quickly and accurately collecting groundwater samples in the field or in complex environments. High-strength, corrosion-resistant and lightweight materials are widely used in portable sampling devices, such as ABS materials. The use of these materials improves the durability and portability of the device.

[0003] In the prior art, groundwater fixed-depth sampling devices usually use a sampler to place a preset length of cable in a groundwater well through a pay-out reel for sampling, and usually rely on a winding device to control the release and recovery of the cable to achieve fixed-depth sampling of the sampler in groundwater; however, the winding device is often bulky and difficult to store, which not only increases the complexity of the operation, but may also affect the efficiency and accuracy of sampling.

[0004] In summary, how to solve the problem that the winding device in the existing groundwater fixed depth sampling device is bulky and difficult to store has become a difficult problem that needs to be solved urgently in this field. Therefore, it is necessary to propose a portable groundwater fixed depth sampling device. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a portable groundwater fixed-depth sampling device, which can be quickly deployed and stored in the field or in a complex environment to quickly monitor groundwater.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a portable groundwater fixed-depth sampling device, comprising a sampler, a storage box and a controller, a driving member is fixedly connected to the inner wall of the storage box, and the controller is used to control the opening and closing of the driving member; a winding reel is coaxially fixedly connected to the output shaft of the driving member, a sampler line is wound on the winding reel, and the sampler line is fixedly connected to the sampler at one end away from the winding reel; the controller is used to control the sampling operation of the sampler on groundwater.

[0007] A wire hole is opened on the top wall of the storage box; a door frame is opened on the outer wall of one side of the storage box, and a box door is hinged in the door frame; a connecting rod is fixedly connected to the outer wall of one side of the storage box, and a wire-laying component for placing the sampler into the wellhead and laying out the wire is provided near the connecting rod on the storage box.

[0008] The end of the connecting rod away from the storage box is fixedly connected to a base, a lofting hole is opened on the base, a circular groove is opened on the top of the base, and a number of L-shaped rods are slidably fitted on the circular groove; the base is provided with a support platform assembly for providing support for the entire device at the wellhead.

[0009] A folding assembly for folding the supporting platform assembly is provided on the L-shaped rod.

[0010] The technical principles of the above scheme are as follows:

[0011] Before sampling groundwater at a certain depth, take the sampler out of the storage box and connect it to the sampler line, then align the base of the device with and place it on the wellhead of the sampling well, then use the folding assembly to unfold the support platform assembly, align the sampler with the wellhead and perform the line-laying operation, control the driving part through the controller to drive the winding disk to rotate, and then place the sampler line wound on the winding disk into the specified depth of the groundwater for sampling, and at the same time, various detection instruments can be placed on the support platform assembly to facilitate the detection of sampled samples. After the sampling is completed, the detection instruments, sampler and samples can be placed in the storage box for storage, and the folding assembly can be used to shrink the support platform assembly and take the storage box away, thereby achieving the portability of the groundwater fixed depth sampling device and adapting to various scenarios for rapid sampling operations.

[0012] The above scheme has the following beneficial effects:

[0013] 1. The present invention realizes the fixed-depth sampling operation of the sampler by designing a portable groundwater fixed-depth sampling device including a sampler, a storage box and a controller, and uses a driving member and a winding reel to control the release and recovery of the sampler line. At the same time, it avoids the problem that the traditional winding device is bulky and difficult to store, and improves the efficiency and accuracy of sampling.

[0014] 2. The present invention, by designing a storage box including structures such as a door frame, a box door and a connecting rod, and utilizing a folding assembly and a supporting platform assembly, enables the entire device to be stably placed on the wellhead during sampling, and can be conveniently folded and stored when not in use, thereby improving the portability and practicality of the device.

[0015] 3. The present invention realizes precise control of the sampling process by controlling the driving member and the sampler through the controller. At the same time, the detection instrument can be placed on the supporting platform assembly to facilitate the sample detection after sampling, thereby improving the convenience and practicality of sampling.

[0016] Furthermore, the folding assembly includes a plurality of fixed blocks arranged in a ring above the base; one end of the L-shaped rod away from the circular groove is fixedly connected to the bottom of the adjacent fixed block; the fixed block adjacent to the storage box is fixedly connected to the side wall of the storage box; the fixed blocks are symmetrical and rotatably equipped with gears, and adjacent gears are meshed with each other; connecting rods are provided between adjacent fixed blocks, and both ends of the connecting rods are fixedly connected to the adjacent gears; a U-shaped rod is provided on the connecting rod on the side away from the storage box, and one end of the connecting rod away from the gear is hinged to the top of the adjacent U-shaped rod, and the bottom end of the U-shaped rod is located in the circular groove and slidably engaged with the circular groove.

[0017] Beneficial effects: Through the design of the folding component, the support platform component can be easily expanded or retracted, so that the entire device can provide stable support during sampling. At the same time, the volume of the device can be reduced when not in use, which is convenient for carrying and storage, thereby improving the portability and flexibility of the device.

[0018] Furthermore, the supporting platform assembly includes a plurality of fan-shaped flat plates, a base having a lofting hole, a circular groove on the top of the base, a plurality of L-shaped rods slidingly fitted on the circular groove, the ends of the L-shaped rods away from the circular grooves are fixedly connected to the bottoms of the adjacent fixed blocks; the bottom ends of the U-shaped rods are located in the circular grooves and slidingly fitted with the circular grooves; the side walls of the fan-shaped flat plates are fixedly connected to the side walls of the adjacent connecting rods, and adjacent fan-shaped flat plates are hinged to each other.

[0019] Beneficial effects: The design of the support platform assembly enables the device to provide a larger working area when sampling, which is convenient for placing detection instruments and sampling tools. At the same time, the hinged design between the fan-shaped flat plates allows the support platform assembly to be flexibly unfolded or folded, thereby improving the adaptability and portability of the device.

[0020] Furthermore, the wire-releasing assembly includes a first connecting rod, the bottom end of which is hinged to the side wall of the storage box, the top end of which is hinged to a second connecting rod, and both ends of the top of the second connecting rod are fixedly connected to pulleys; the end of the sampler wire away from the winding reel passes through the wire hole and the pulley and is wound around the pulley.

[0021] Beneficial effects: The design of the pay-out assembly allows the sampler line to be released and recovered more smoothly, avoiding the entanglement or jamming of the cable that may occur during the release or recovery process, and improving the efficiency and accuracy of sampling.

[0022] Furthermore, a line-paying length sensor is fixedly connected to the line hole, and the controller is used to receive a line-paying length signal sent by the line-paying length sensor.

[0023] Beneficial effect: Through the design of the pay-off length sensor, the pay-off length of the sampler line can be monitored in real time, thereby achieving precise control of the sampler lowering depth, and improving the accuracy and reliability of sampling.

[0024] Furthermore, a water contact sensor is fixedly connected to the bottom of the sampler, and the controller is used to receive a contact signal sent by the water contact sensor indicating that the sampler is in contact with groundwater.

[0025] Beneficial effects: The design of the water contact sensor can monitor in real time whether the sampler is in contact with groundwater, thereby ensuring that the sampler performs sampling operations at the correct depth and avoiding sampling failures caused by the sampler not contacting groundwater.

[0026] Furthermore, a depth sensor is fixedly connected to the outer wall of the sampler, and the controller is used to receive a groundwater depth signal sent by the depth sensor.

[0027] Beneficial effects: The design of the depth sensor can monitor the depth information of groundwater in real time, provide accurate data support for sampling operations, and also help to evaluate the dynamic changes of groundwater levels.

[0028] Furthermore, an anti-corrosion layer is coated on the outer side wall of the sampler.

[0029] Beneficial effects: The design of the anti-corrosion layer can improve the corrosion resistance of the sampler and extend the service life of the sampler, while also helping to protect the sampler from corrosion by chemical substances in groundwater.

[0030] Furthermore, a geological radar sensor is fixedly connected to the outer wall of the sampler, and the controller is used to receive geological layer structure data sent by the geological radar sensor.

[0031] Beneficial effects: The design of the geological radar sensor can monitor the structural information of the geological layer in real time, provide more comprehensive data support for sampling operations, and also help to evaluate the geological background and hydrogeological conditions of groundwater.

[0032] Furthermore, a handle is fixedly connected to an outer wall of the storage box on one side away from the first connecting rod.

[0033] Beneficial effects: The design of the handle makes the entire device more convenient to carry and move, thereby improving the portability and practicality of the device.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a top axonometric view of a portable groundwater fixed-depth sampling device in an embodiment of the present invention.

[0036] Figure 2 It is a bottom-up isometric view of the portable groundwater fixed-depth sampling device in an embodiment of the present invention.

[0037] Figure 3 It is a front cross-sectional view of the storage box in the embodiment of the present invention.

[0038] Figure 4 It is a top cross-sectional view of the base in an embodiment of the present invention.

[0039] Figure 5 It is a rear view of the portable groundwater fixed-depth sampling device in an embodiment of the present invention.

[0040] The figure marks in the drawings of the specification include: 1. sampler; 2. storage box; 3. driving member; 4. winding reel; 5. sampler line; 6. line hole; 7. box door; 8. connecting rod; 9. fixing block; 10. gear; 11. connecting rod; 12. U-shaped rod; 13. fan-shaped plate; 14. sample hole; 15. circular groove; 16. L-shaped rod; 17. first connecting rod; 18. second connecting rod; 19. pulley; 20. handle; 21. base. DETAILED DESCRIPTION

[0041] The following is further described in detail through specific implementation methods:

[0042] Embodiment 1:

[0043] As attached Figure 1-Figure 5 As shown: a portable groundwater fixed-depth sampling device, including a sampler 1, a storage box 2 and a controller, a driving member 3 is fixedly connected to the inner wall of the storage box 2 by screws, the controller is used to control the opening and closing of the driving member 3, a winding reel 4 is coaxially fixedly connected to the output shaft of the driving member 3 by screws, a sampler line 5 is wound on the winding reel 4, the sampler line 5 is fixedly connected to the sampler 1 at one end away from the winding reel 4 by screws, and the controller is used to control the sampling operation of the sampler 1 on groundwater.

[0044] A wire hole 6 is opened on the top wall of the storage box 2; a door frame is opened on the outer wall of one side of the storage box 2, and a box door 7 is hinged in the door frame; a connecting rod 8 is fixedly connected to the outer wall of one side of the storage box 2 by screws, and a wire-laying component for placing the sampler 1 into the wellhead and laying out the wire is provided near the connecting rod 8 on the storage box 2.

[0045] The end of the connecting rod 8 away from the storage box 2 is fixedly connected to the base 21 by screws. A sample hole 14 is opened on the base 21, and a circular groove 15 is opened on the top of the base 21. A number of L-shaped rods 16 are slidably fitted on the circular groove 15; the base 21 is provided with a support platform assembly for providing support for the entire device at the wellhead.

[0046] The L-shaped rod 16 is provided with a folding assembly for folding the supporting platform assembly.

[0047] The folding assembly includes a plurality of fixing blocks 9 arranged in a "C" shape above the base 21; the fixing blocks 9 adjacent to the storage box 2 are fixedly connected to the side walls of the storage box 2 by screws; the ends of the L-shaped rods 16 away from the circular grooves 15 are integrally formed with the bottoms of the fixing blocks 9 adjacent thereto; the fixing blocks 9 are symmetrically and rotationally fitted with gears 10, and adjacent gears 10 are meshed with each other.

[0048] Connecting rods 11 are provided between adjacent fixing blocks 9 , and both ends of the connecting rods 11 are integrally formed with the gears 10 adjacent thereto.

[0049] A U-shaped rod 12 is symmetrically arranged in the circular groove 15 , and the bottom ends of the U-shaped rod 12 are slidably matched with the circular groove 15 .

[0050] The gears 10 located on the fixing blocks 9 at both ends of the “C” shape are integrally formed with hinged rods 22, and one end of the hinged rod 22 away from the gear 10 is hinged to the top end of the U-shaped rod 12 adjacent thereto.

[0051] The supporting platform assembly includes a plurality of fan-shaped flat plates 13; the side walls of the fan-shaped flat plates 13 are fixedly welded to the side walls of the connecting rods 11 adjacent thereto, and the adjacent fan-shaped flat plates 13 are hinged to each other.

[0052] The line-releasing assembly includes a first connecting rod 17, the bottom end of the first connecting rod 17 is hinged to the side wall of the storage box 2, the top of the first connecting rod 17 is hinged to a second connecting rod 18, and both ends of the top of the second connecting rod 18 are fixedly connected to a pulley 19 by screws; the end of the sampler line 5 away from the winding reel 4 passes through the wire hole 6 and the pulley 19 and is wound around the pulley 19.

[0053] A wire-paying length sensor is fixedly connected to the wire hole 6 by means of screws, and the controller is used to receive a wire-paying length signal sent by the wire-paying length sensor.

[0054] A water contact sensor is fixedly connected to the bottom of the sampler 1 by screws, and the controller is used to receive a contact signal sent by the water contact sensor indicating that the sampler 1 is in contact with groundwater.

[0055] A depth sensor is fixedly connected to the outer wall of the sampler 1 by screws, and the controller is used to receive the groundwater depth signal sent by the depth sensor.

[0056] A geological radar sensor is fixedly connected to the outer wall of the sampler 1 by screws, and the controller is used to receive geological layer structure data sent by the geological radar sensor.

[0057] A handle 20 is fixedly connected to the outer wall of the storage box 2 on one side away from the first connecting rod 17 by screws.

[0058] The specific implementation process is as follows:

[0059] In this embodiment, the sampler 1 is used to collect water samples from groundwater; the sampler 1 is designed as a sealed conical structure to prevent the water sample from being contaminated during the collection process; a water sample storage chamber is opened inside the sampler 1 for storing the collected water samples; a water inlet is opened at the bottom of the sampler 1, and the water inlet is connected to the water sample storage chamber, and a sampling valve is provided in the water inlet. When the sampler 1 descends to a specified depth, the sampling valve of the water inlet opens to allow groundwater to enter the water sample storage chamber; after the sampling is completed, the sampling valve is closed to prevent the water sample from leaking, and the controller is used to control the opening and closing of the sampling valve.

[0060] In this embodiment, the initial state of the folding component is the unfolded state; Figure 1 For example, when sampling groundwater at a fixed depth, the depth value of the groundwater to be sampled is input into the controller, and then the sampler 1 is taken out of the storage box 2 and connected to the sampler line 5. Since the bottom end of the first connecting rod 17 is hinged to the side wall of the storage box 2, the top of the first connecting rod 17 is hinged to the second connecting rod 18, and the top ends of the second connecting rod 18 are fixedly connected to the pulley 19 by screws. At this time, the user can rotate the first connecting rod 17 to be perpendicular to the storage box 2, and open the second connecting rod 18 to be perpendicular to the first connecting rod 17, and pass the sampler line 5 through the pulley 19 and place it above the wellhead. The controller records the line length at this time as 0 meters.

[0061] by Figure 3 and Figure 1 For example, the user controls the driving member 3 through the controller to drive the winding drum 4 to rotate, and releases the sampler line 5 wound on the winding drum 4. In this embodiment, the driving member 3 is a reduction motor. At this time, due to the action of gravity, the sampler 1 can pass through the sampling hole 14 on the base 21 to enter the wellhead and reach the specified depth. At this time, the controller is fixedly connected to the line length sensor on the line hole 6 by screws, and the line length is recorded in real time to realize real-time monitoring of the depth value from the sampler 1 to the ground.

[0062] When the sampler 1 contacts the groundwater, the water contact sensor sends a signal to the controller, which records the length of the line at this time, which is the depth value from the groundwater level to the ground at that location, and continues to lay out the line for fixed-depth groundwater sampling.

[0063] When the controller detects that the sampler 1 reaches the depth value of the groundwater that needs to be sampled, the controller sends a control signal to control the reduction motor to close. At this time, the sampling operation is performed. The controller sends a control signal to control the sampling valve on the sampler 1 to open. At this time, the groundwater at this depth can enter the water sample storage chamber from the water inlet of the sampler 1. After the sampling valve is opened for 15 seconds, the controller sends a control signal to close the sampling valve. At this time, the water sample can be prevented from leaking. After the sampling is completed, the controller controls the reduction motor to drive the winding reel 4 to rotate to recover the sampler line 5, and lift the sampler 1 to the wellhead.

[0064] During the sampling process, the depth sensor fixedly connected by screws on the outer wall of the sampler 1 can send the depth data from the sampling position to the groundwater surface to the controller in real time. The controller records the depth data from the position to the groundwater surface to provide data support for subsequent sample analysis. At the same time, the geological radar sensor fixedly connected by screws on the outer wall of the sampler 1 can send the geological data of the sampling position to the controller in real time. The controller records the geological data of the position to provide data support for subsequent sample analysis.

[0065] by Figure 1 For example, when sampling, various detection instruments can be placed on the fan-shaped flat plate 13 to facilitate the user to detect the sampled samples.

[0066] by Figure 1 and Figure 2 For example, after sampling is completed, the user can open the door 7 on the storage box 2, put the detection instrument, the sampler 1 and the sample into the storage box 2 for storage, and then fold the first connecting rod 17 and the second connecting rod 18 to be parallel to the fan-shaped flat plate 13. Then, since the bottom ends of the U-shaped rods 12 are both located in the circular grooves 15 and slide in cooperation with the circular grooves 15, and the adjacent fan-shaped flat plates 13 are hinged to each other, the user can lift the fan-shaped flat plates 13 adjacent to the U-shaped rods 12 by hand, so that they can fold into an inverted "V" shape. Then, the user can push the U-shaped rods 12 apart by hand and slide them relatively along the circular grooves 15 on the base 21 to unfold them. Figure 1 and Figure 4 For example, the user pushes the U-shaped rods 12 apart by hand so that the bottom ends of the U-shaped rods 12 are in the circular grooves 15 and slide relative to each other along the circular grooves 15; since the top ends of the U-shaped rods 12 are hinged to the hinged rods 22, the fan-shaped flat plates 13 adjacent to the U-shaped rods 12 are lifted and folded into an inverted "V" shape, so that the U-shaped rods 12 are in a state of being ... Figure 1 For example, at this time, the hinged rod 22 tilts upward, and the upward tilt of the hinged rod 22 can drive the adjacent gear 10 to rotate. Since the gears 10 are all rotatably connected on the fixed block 9, the gears 10 are meshed with each other. When the hinged rod 22 tilts upward, it can drive the fixed block 9 to lift upward and then drive the adjacent connecting rod 11 to tilt downward, so that Figure 4 For example, when the bottom end of the U-shaped rod 12 moves to a position close to the storage box 2, the adjacent connecting rods 11 are all in a "V" shape, thereby achieving the effect of folding all the connecting rods 11. Since the end of the L-shaped rod 16 away from the circular groove 15 is integrally formed with the bottom of the adjacent fixed block 9, the two symmetrical L-shaped rods 16 can provide support for the fixed block 9 while the fixed block 9 moves with the connecting rod 11, thereby increasing the stability of the connecting rod 11 and the fixed block 9 during the folding movement.

[0067] When all the connecting rods 11 are folded into a "V" shape, the fan-shaped flat plate 13 has its side walls fixedly welded to the side walls of the adjacent connecting rods 11, and the adjacent fan-shaped flat plates 13 can be in a "folded fan shape" when the connecting rods 11 are in a "V" shape, ultimately achieving the effect of folding and storing the entire fan-shaped flat plate 13.

[0068] The unfolding process of the fan-shaped flat plate 13 is the same as above. The user only needs to push the L-shaped rod 16 to relatively close it on the base 21 to realize the unfolding operation of the fan-shaped flat plate 13. At the same time, when the fan-shaped flat plate 13 is unfolded, it can also provide a stable support effect for the sampler 1 during sampling.

[0069] After the sampling is completed, the user can put the detection instrument, the sampler 1 and the sample into the storage box 2 for storage. The user can take the storage box 2 away by the handle 20 to facilitate the sampling operation at the next sampling location, thereby realizing the ability to quickly deploy and store in the wild or complex environment to quickly monitor groundwater.

[0070] Embodiment 2:

[0071] As attached Figure 1 As shown, the difference from Example 1 is that an anti-corrosion layer is coated on the outer wall of the sampler 1. In this embodiment, the anti-corrosion layer is a Teflon coating.

[0072] The specific implementation process is as follows: The design of the corrosion-resistant Teflon coating can improve the corrosion resistance of the sampler 1, extend the service life of the sampler 1, and also help protect the sampler 1 from corrosion by chemical substances in the groundwater.

[0073] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A portable groundwater fixed depth sampling device, comprising a sampler (1), characterized in that: It also comprises a storage box (2) and a controller, wherein a driving member (3) is fixedly connected to the inner wall of the storage box (2), and the controller is used to control the opening and closing of the driving member (3); a winding disk (4) is coaxially fixedly connected to the output shaft of the driving member (3), a sampler line (5) is wound on the winding disk (4), and the end of the sampler line (5) away from the winding disk (4) is fixedly connected to the sampler (1); and the controller is used to control the sampling operation of the sampler (1) on groundwater; A wire hole (6) is provided on the top wall of the storage box (2); a door frame is provided on the outer wall of one side of the storage box (2), and a box door (7) is hinged in the door frame; a connecting rod (8) is fixedly connected to the outer wall of one side of the storage box (2), and a wire-laying assembly for placing the sampler (1) into the wellhead and laying out the wire is provided at a position near the connecting rod (8) on the storage box (2); The end of the connecting rod (8) away from the storage box (2) is fixedly connected to a base (21), a sample hole (14) is opened on the base (21), and a circular groove (15) is opened on the top of the base (21); a support platform component for providing support for the entire device at the wellhead is provided on the base (21); An L-shaped rod (16) is symmetrically and slidably matched on the circular groove (15), and a folding assembly for folding the supporting platform assembly is provided on the L-shaped rod (16).

2. The portable groundwater fixed depth sampling device according to claim 1 is characterized in that: The folding assembly comprises a plurality of fixed blocks (9) arranged in a "C" shape above a base (21); the fixed blocks (9) adjacent to the storage box (2) are fixedly connected to the side wall of the storage box (2); the ends of the L-shaped rods (16) away from the circular grooves (15) are fixedly connected to the bottoms of the adjacent fixed blocks (9); the fixed blocks (9) are symmetrically and rotationally matched with gears (10), and adjacent gears (10) are meshed with each other; Connecting rods (11) are provided between adjacent fixing blocks (9), and both ends of the connecting rods (11) are fixedly connected to the gears (10) adjacent thereto; U-shaped rods (12) are symmetrically provided in the circular grooves (15), and the bottom ends of the U-shaped rods (12) are slidably matched with the circular grooves (15); the gears (10) located on the fixing blocks (9) at both ends of the "C" shape are fixedly connected to hinged rods (22), and the ends of the hinged rods (22) away from the gears are hingedly connected to the top ends of the U-shaped rods (12) adjacent thereto.

3. The portable groundwater fixed depth sampling device according to claim 2 is characterized in that: The supporting platform assembly comprises a plurality of fan-shaped flat plates (13), the side walls of the fan-shaped flat plates (13) are fixedly connected to the side walls of the connecting rods (11) adjacent thereto, and the adjacent fan-shaped flat plates (13) are hinged to each other.

4. The portable groundwater fixed depth sampling device according to claim 3 is characterized in that: The wire-releasing assembly comprises a first connecting rod (17), the bottom end of the first connecting rod (17) is hinged to the side wall of the storage box (2), the top end of the first connecting rod (17) is hinged to a second connecting rod (18), and both ends of the top of the second connecting rod (18) are fixedly connected to pulleys (19); the end of the sampler wire (5) away from the winding drum (4) passes through the wire hole (6) and the pulley (19) and is wound around the pulley (19).

5. The portable groundwater fixed depth sampling device according to claim 4 is characterized in that: A wire-paying length sensor is fixedly connected to the wire hole (6), and the controller is used to receive a wire-paying length signal sent by the wire-paying length sensor.

6. The portable groundwater fixed depth sampling device according to claim 5, characterized in that: A water contact sensor is fixedly connected to the bottom of the sampler (1), and the controller is used to receive a contact signal sent by the water contact sensor indicating that the sampler (1) is in contact with groundwater.

7. The portable groundwater fixed depth sampling device according to claim 6, characterized in that: A depth sensor is fixedly connected to the outer wall of the sampler (1), and the controller is used to receive a groundwater depth signal sent by the depth sensor.

8. The portable groundwater fixed depth sampling device according to claim 7, characterized in that: The outer wall of the sampler (1) is coated with an anti-corrosion layer.

9. The portable groundwater fixed depth sampling device according to claim 8, characterized in that: A geological radar sensor is fixedly connected to the outer wall of the sampler (1), and the controller is used to receive geological layer structure data sent by the geological radar sensor.

10. The portable groundwater fixed depth sampling device according to claim 9, characterized in that: A handle (20) is fixedly connected to an outer wall of the storage box (2) on a side away from the first connecting rod (17).

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