A groundwater quality survey sampling device

Abstract

The utility model relates to water quality sampling equipment technical field discloses a kind of underground water quality survey sampling device, comprising: sampling tank;And the pumping mechanism being installed in the lateral wall of sampling tank, pumping mechanism includes piston cavity, piston being movably connected in piston cavity, the drive assembly for driving piston reciprocating between first position and second position, and two input pipes and two output pipes being communicated with piston cavity, input pipe and output pipe are set one by one, and inside are all provided with check valve, external underground water can sequentially by input pipe, piston cavity and output pipe into sampling tank, piston moves from first position to second position process, check valve on the output pipe close to second position and input pipe close to first position are in open state, other check valve is in closed state, conversely, the state of all check valve is switched. Piston is constantly moved between first position and second position, realizes the continuous, efficient sampling of underground water.

Description

Technical Field

[0001] This utility model relates to the technical field of water quality sampling equipment, and in particular to a groundwater quality survey and sampling device. Background Technology

[0002] Groundwater, as a vital component of Earth's water resources, is widely distributed throughout the earth's strata. Its quality directly impacts the stability of the ecological environment, the sustainability of agricultural irrigation, the safety of industrial production, and the hygiene and safety of human drinking water. In urban planning, understanding groundwater quality provides a scientific basis for the rational layout of groundwater extraction projects, avoiding engineering risks and health hazards caused by groundwater pollution.

[0003] In the prior art, patent document CN222618307U discloses a water quality sampling device for hydrogeological exploration. This device achieves water sampling through a structural combination of a sampling tank and a piston. Specifically, the lower end of the tank is equipped with a filter assembly to filter underwater impurities, mud, and aquatic plants, preventing impurities from entering the sampling tank and affecting the purity of the sample. The piston is slidably connected to the middle of the inner wall of the tank and can reciprocate along the axis of the tank. The piston is designed with a first through hole and a first cover plate. When the piston moves closer to or away from the filter assembly, the first cover plate can open or close the first through hole respectively, thereby realizing the intake and temporary storage of detection water. However, although this patent document proposes an improved water quality sampling scheme, a thorough analysis of its technical points reveals that this scheme still has obvious limitations. The main problem is that the movable rod can only draw water once per up-and-down reciprocating motion, resulting in relatively low water collection efficiency. This inefficient water collection method leads to a long survey process, which severely restricts the improvement of work efficiency and makes it difficult to meet the practical needs of rapid and efficient water quality surveys.

[0004] Therefore, it is particularly urgent to develop a groundwater quality survey and sampling device that can significantly improve water extraction efficiency. Utility Model Content

[0005] The present invention aims to provide a groundwater quality survey and sampling device to overcome the shortcomings of the above-mentioned situation.

[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A groundwater quality survey and sampling device, comprising:

[0008] Sampling container; and

[0009] A pumping mechanism installed on the outer wall of the sampling tank includes a piston chamber, a piston movably connected in the piston chamber, a drive assembly for driving the piston to reciprocate between a first position and a second position, and two input pipes and two output pipes communicating with the piston chamber. The input pipes and output pipes are arranged one-to-one and each is equipped with a one-way valve. External groundwater can enter the sampling tank sequentially through the input pipes, the piston chamber, and the output pipes. During the process of the piston moving from the first position to the second position, the one-way valves on the output pipe near the second position and the input pipe near the first position are in the open state, while the other one-way valves are in the closed state. Conversely, during the process of the piston moving from the second position to the first position, the state of all one-way valves switches accordingly.

[0010] Furthermore, it also includes a filter tube, the wall of which is provided with filter holes, and both ends of the filter tube are respectively connected to the ends of the two input tubes away from the piston chamber.

[0011] Furthermore, it also includes a connecting tube, one end of which is connected to the sampling vessel, and the ends of the two output tubes away from the piston chamber are connected to each other and connected to the other end of the connecting tube.

[0012] Furthermore, it also includes a movable rod arranged along the axis of the piston cavity. One end of the movable rod is fixedly connected to the piston, and the other end of the movable rod movably passes through the piston cavity and is connected to the drive assembly. The drive assembly is used to drive the movable rod to reciprocate along the axis of the piston cavity, so as to realize that the piston can move between a first position and a second position.

[0013] Furthermore, a sealing ring is slidably sleeved on the periphery of the movable rod, and the sealing ring is fixedly installed on the piston cavity.

[0014] Furthermore, the driving component includes:

[0015] A drive motor is fixedly connected to the outer wall of the sampling container;

[0016] A first connecting rod, one end of which is connected to the output shaft of the drive motor; and

[0017] A second link, one end of which is hinged to the other end of the first link, and the second link is hinged to the other end of the movable rod.

[0018] Furthermore, a support frame is fixedly connected to the outer wall of the sampling container, and the piston chamber is fixedly connected to the support frame.

[0019] Furthermore, a top plate is fixedly connected to the top of the sampling container. The top plate is located in the radial direction of the sampling container, and two container lids are hinged to the top plate. The two container lids are axially symmetrically distributed along the top plate.

[0020] Furthermore, the side of the can lid away from the top plate is detachably connected to the sampling can by a snap fastener.

[0021] Furthermore, a water outlet pipe is connected to the lower end of the side wall of the sampling tank, and a rubber tube is connected to the water outlet pipe. A water-stop clamp is detachably connected to the rubber tube.

[0022] A handle is installed on the upper part of the outer wall of the sampling container.

[0023] Compared with the prior art, this utility model has at least the following advantages:

[0024] This invention utilizes the reciprocating motion of a piston to achieve the intake and compression of groundwater into the sampling tank. The piston continuously moves between the first and second positions, enabling continuous and efficient groundwater sampling, significantly improving water extraction efficiency. It allows for the acquisition of the required groundwater sample volume in a short time, meeting the practical needs of rapid and efficient water quality surveys and effectively solving the problem of low sampling efficiency in existing technologies. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the groundwater quality survey and sampling device of this utility model;

[0027] Figure 2 This is a cross-sectional view of the groundwater quality survey and sampling device of this utility model.

[0028] Reference numerals: 1. Sampling tank; 2. Piston chamber; 3. Piston; 4. Input pipe; 5. Output pipe; 6. One-way valve; 7. Filter pipe; 8. Filter hole; 9. Connecting pipe; 10. Movable rod; 11. Sealing ring; 12. Drive motor; 13. First connecting rod; 14. Second connecting rod; 15. Support frame; 16. Top plate; 17. Tank lid; 18. Water outlet pipe; 19. Rubber hose; 20. Handle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figure 1-2 This utility model provides a groundwater quality survey and sampling device, which mainly consists of a sampling tank 1 and a pumping mechanism installed on the outer wall of the sampling tank 1.

[0032] Among them, sampling container 1 is a cylindrical metal container with a support frame 15 welded to its outer wall.

[0033] The pumping mechanism is the core component of the device, mainly composed of piston chamber 2, piston 3, drive assembly, and piping system. Piston chamber 2 is fixedly connected to support frame 15. Piston chamber 2 is a cylindrical metal cavity with a smooth inner wall to ensure a tight fit with piston 3. Piston 3 is a cylindrical component made of corrosion-resistant rubber material. Its outer diameter matches the inner diameter of piston chamber 2, allowing it to fit tightly against the inner wall of piston chamber 2 and ensure good sealing. Piston 3 is connected to the drive assembly via a movable rod 10. The movable rod 10 is made of high-strength stainless steel and is located along the axis of piston chamber 2. One end of the movable rod 10 is fixedly connected to the center of piston 3, while the other end movably passes through piston chamber 2 and is connected to the drive assembly. A sealing ring 11, made of rubber, is slidably fitted around the movable rod 10 and is fixedly installed on piston chamber 2 to effectively prevent liquid leakage.

[0034] Preferably, the pumping mechanism further includes two input pipes 4 and two output pipes 5, which are arranged one-to-one and are all corrosion-resistant metal pipes. One end of each input pipe 4 and output pipe 5 is connected to the corresponding port of the piston chamber 2 through a pipe joint. The end of the input pipe 4 away from the piston chamber 2 is used to connect with groundwater, while the end of the output pipe 5 away from the piston chamber 2 is connected to the sampling tank 1. A one-way valve 6 is installed inside each of the input pipes 4 and output pipes 5. The one-way valve 6 ensures that the water flow can only be in a predetermined direction, that is, external groundwater can enter the sampling tank 1 sequentially through the input pipe 4, the piston chamber 2, and the output pipe 5. During the process of piston 3 moving from the first position to the second position, the one-way valves 6 of the input pipe 4 and the output pipe 5 near the second position are respectively in the closed and open states, and the one-way valves 6 of the input pipe 4 and the output pipe 5 near the first position are respectively in the open and closed states. Conversely, during the process of piston 3 moving from the second position to the first position, the one-way valves 6 of the input pipe 4 and the output pipe 5 near the first position are respectively in the closed and open states, and the one-way valves 6 of the input pipe 4 and the output pipe 5 near the second position are respectively in the open and closed states.

[0035] The filter tube 7 is a metal tube with filter holes 8 distributed on its outer wall. The diameter of the filter holes 8 is set according to actual needs, which can effectively filter out large particles, silt, and aquatic plants in the groundwater, preventing them from entering the sampling tank 1 and affecting the purity of the water sample. Both ends of the filter tube 7 are connected to the ends of the two input pipes 4 away from the piston chamber 2 via clamps (not shown in the figure), allowing the filtered groundwater to enter the input pipes 4. By removing the clamps, the filter tube 7 can be removed for cleaning.

[0036] One end of the connecting pipe 9 is connected to the side wall of the sampling tank 1, and the other end is connected to the end of the two output pipes 5 away from the piston chamber 2 through a three-way connector. The groundwater transported by the two output pipes 5 is collected and introduced into the sampling tank 1 to ensure smooth water flow.

[0037] Preferably, the drive assembly is installed on the outer wall of the sampling tank 1 and mainly consists of a drive motor 12, a first connecting rod 13, and a second connecting rod 14. The drive motor 12 is a micro-gear motor, waterproof, and capable of outputting high torque. The drive motor 12 is fixedly connected to the outer wall of the sampling tank 1 via a motor bracket, and its output shaft is connected to one end of the first connecting rod 13. The first connecting rod 13 and the second connecting rod 14 are metal connecting rods with a rust-proof coating. The other end of the first connecting rod 13 is hinged to one end of the second connecting rod 14, and the other end of the second connecting rod 14 is hinged to the other end of the movable rod 10, forming a complete mechanical transmission chain. When the drive motor 12 is started, it drives the other end of the first connecting rod 13 to rotate around its end, synchronously driving the movable rod 10 to reciprocate along the axis of the piston 3, further driving the piston 3 to move between the first and second positions. This invention converts the rotational motion of the drive motor 12 into the linear reciprocating motion of the movable rod 10, enabling the piston 3 to reciprocate within the piston chamber 2.

[0038] It should be noted that the drive motor 12 of this utility model is driven by a control module and an external power supply. The control module can be an air switch, and the external power supply can be a storage battery. The air switch and the storage battery are set above the water surface, and the drive motor 12, the air switch and the storage battery are connected in series by wires.

[0039] Sampling process of piston 3 reciprocating motion:

[0040] During the piston 3's movement from the first position to the second position: As piston 3 moves from the first position to the second position, the one-way valves 6 on the output pipe 5 near the second position and the input pipe 4 near the first position automatically open under the influence of the internal and external pressure difference, while the other one-way valves 6 remain closed. At this time, under the influence of atmospheric pressure and its own pressure, the external groundwater passes through the filter pipe 7 to remove impurities, enters the input pipe 4, and then flows into the piston chamber 2 through the opened one-way valve 6. Meanwhile, the groundwater already in the piston chamber 2 enters the sampling tank 1 and is temporarily stored through the opened one-way valve 6 on the output pipe 5 near the second position and the connecting pipe 9.

[0041] During the piston 3's movement from the second position to the first position: After piston 3 moves to the second position, it begins to move in the opposite direction under the drive of drive motor 12, moving from the second position to the first position. At this time, the states of all one-way valves 6 are switched accordingly. The one-way valves 6 on the output pipe 5 near the first position and the input pipe 4 near the second position open, while the other one-way valves 6 close. Under the squeezing action of piston 3, the groundwater in piston chamber 2 continues to be transported into sampling tank 1 through the opened one-way valve 6 on the output pipe 5 near the first position and the connecting pipe 9. At the same time, new groundwater from outside enters piston chamber 2 under pressure through another input pipe 4 and the opened one-way valve 6, starting a new round of sampling cycle. In this way, piston 3 continuously moves back and forth between the first and second positions, realizing continuous and efficient sampling of groundwater. Through the above process, on the one hand, the original groundwater in piston chamber 2 is forced into sampling tank 1; on the other hand, the process of pressing external groundwater into piston chamber 2 is simultaneously realized.

[0042] Those skilled in the art will understand that initially, the piston chamber 2 is in an unloaded state. During the first movement of the piston 3, it can only press external water into the piston chamber 2, but cannot press groundwater into the sampling tank 1. The rest of the process can refer to the above sampling process.

[0043] Furthermore, the top of the sampling container 1 of this invention is fixedly connected to a top plate 16, which is located radially in the sampling container 1. Two lids 17 are hinged to the top plate 16, and the two lids 17 are symmetrically distributed along the top plate 16. The side of the lid 17 away from the top plate 16 is detachably connected to the sampling container 1 via a snap fastener (not shown in the figure). A sealing ring (not shown in the figure) is provided between the lid 17 and the top of the sampling container 1 to achieve a seal between the lid 17 and the sampling container 1. Before sampling, the sampling container 1 is filled with gas. To prevent groundwater from entering the sampling container 1 through the lid 17 during groundwater sampling, this invention uses a snap fastener to fix the lid 17 to the sampling container 1, thus preventing the lid 17 from opening. Simultaneously, the sealing ring prevents groundwater from entering through this point, thereby ensuring the accuracy of the sampling data.

[0044] Understandably, in order to facilitate observation of the water level inside the sampling tank 1 during the sampling process, the top plate 16 and / or the tank cover 17 can be made of transparent non-metallic material, or a transparent observation window can be installed on it.

[0045] Furthermore, the sampling tank 1 of this invention is connected to a water outlet pipe 18 at the lower end of its side wall, and a rubber tube 19 is connected to the water outlet pipe 18. A water-stop clamp is detachably connected to the rubber tube 19. During the sampling process, by installing the water-stop clamp on the sampling tube, water can be prevented from entering the sampling tank 1 through the output pipe 5. After the sampling is completed, by removing the water-stop clamp on the rubber tube 19, the sample can flow out through the water outlet pipe 18 and the rubber tube 19, thereby ensuring that too little sample is taken out.

[0046] During the sampling process, the operator can observe the water level changes in sampling tank 1 to determine whether the required sampling volume has been reached. When the required sampling volume is reached, the drive motor 12 is turned off in time to stop the reciprocating motion of piston 3. Then, the water stop clamp is opened to allow the water sample in sampling tank 1 to flow smoothly into the sample storage container through the water outlet pipe 18 and the rubber tube 19, thus completing the sampling operation.

[0047] For ease of carrying, a handle 20 is installed on the upper part of the outer wall of the sampling container 1. To facilitate the lowering process of the sampling device of this utility model, a connecting rope can be installed on the handle 20, and the lowering and lifting process of the sampling container 1 can be achieved by releasing the connecting rope.

[0048] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A groundwater quality survey and sampling device, characterized in that, include: Sampling container (1); and A pumping mechanism is installed on the outer wall of the sampling tank (1). The pumping mechanism includes a piston chamber (2), a piston (3) movably connected in the piston chamber (2), a drive assembly for driving the piston (3) to reciprocate between a first position and a second position, and two input pipes (4) and two output pipes (5) connected to the piston chamber (2). The input pipes (4) and output pipes (5) are arranged one-to-one and each is equipped with a one-way valve (6). External groundwater can enter the sampling tank (1) in sequence through the input pipes (4), the piston chamber (2) and the output pipes (5). During the process of the piston (3) moving from the first position to the second position, the one-way valves (6) on the output pipe (5) near the second position and the input pipe (4) near the first position are in the open state, and the other one-way valves (6) are in the closed state. Conversely, during the process of the piston (3) moving from the second position to the first position, the state of all one-way valves (6) is switched accordingly.

2. The groundwater quality survey and sampling device according to claim 1, characterized in that, It also includes a filter tube (7), on which filter holes (8) are arranged. The two ends of the filter tube (7) are respectively connected to the ends of the two input tubes (4) away from the piston chamber (2).

3. The groundwater quality survey and sampling device according to claim 1, characterized in that, It also includes a connecting tube (9), one end of which is connected to the sampling tank (1), and the two output tubes (5) are connected to the ends away from the piston chamber (2) and connected to the other end of the connecting tube (9).

4. The groundwater quality surveying and sampling device according to claim 1, characterized in that, It also includes a movable rod (10) arranged along the axial direction of the piston cavity (2). One end of the movable rod (10) is fixedly connected to the piston (3), and the other end of the movable rod (10) movably passes through the piston cavity (2) and is connected to the drive assembly. The drive assembly is used to drive the movable rod (10) to reciprocate along the axial direction of the piston cavity (2) so as to realize that the piston (3) can move between the first position and the second position.

5. The groundwater quality survey and sampling device according to claim 4, characterized in that, A sealing ring (11) is slidably sleeved on the periphery of the movable rod (10), and the sealing ring (11) is fixedly installed on the piston cavity (2).

6. The groundwater quality surveying and sampling device according to claim 4, characterized in that, The driving component includes: A drive motor (12) is fixedly connected to the outer wall of the sampling container (1); A first connecting rod (13) with one end connected to the output shaft of the drive motor (12); and A second link (14) is hinged at one end to the first link (13) and at the other end to the movable rod (10).

7. The groundwater quality surveying and sampling device according to claim 1, characterized in that, The outer wall of the sampling container (1) is fixedly connected to a support frame (15), and the piston chamber (2) is fixedly connected to the support frame (15).

8. The groundwater quality surveying and sampling device according to claim 1, characterized in that, The top of the sampling container (1) is fixedly connected to a top plate (16), which is located in the radial direction of the sampling container (1). The top plate (16) is hinged to two can lids (17), which are axially symmetrically distributed along the top plate (16).

9. The groundwater quality surveying and sampling device according to claim 8, characterized in that, The side of the can lid (17) away from the top plate (16) is detachably connected to the sampling can (1) by a snap fastener.

10. The groundwater quality surveying and sampling device according to any one of claims 1 to 9, characterized in that, The sampling tank (1) has a water outlet pipe (18) connected to the lower end of its side wall. A rubber tube (19) is connected to the water outlet pipe (18). A water stop clamp is detachably connected to the rubber tube (19). A handle (20) is installed on the upper end of the outer side wall of the sampling container (1).

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