Negative pressure type underground water layered sampling device

Abstract

The utility model discloses a negative pressure formula underground water layered sampling device, including stand, the stand top is provided with L type support, the L type support is rotationally installed with the reel, is wound with the measuring rope on the reel, one end of reel is connected with servo drive assembly, the output of servo drive assembly is fixedly connected with the support axle of reel, the lower end of measuring rope is suspended and is installed with the sampling cylinder, a plurality of negative pressure sampling components are arranged at fixed intervals in the sampling cylinder, the utility model relates to underground water sampling technical field, and servo drive assembly is the power, and cooperate reel and measuring rope, realize the position adjustment of sampling cylinder in vertical direction, control reel action and release measuring rope, under the action of gravity, sampling cylinder goes into the water surface below, when sampling cylinder reaches the setting sampling depth, the ground station sends the instruction to the controller, and negative pressure sampling component acts, and the water sample of corresponding layer position is sucked to the corresponding sampling pipe.

Description

Technical Field

[0001] This utility model relates to the field of groundwater sampling technology, specifically a negative pressure groundwater stratified sampling device. Background Technology

[0002] Groundwater monitoring is a technical means of long-term protection that dynamically tracks data such as water level and water quality, aiming to understand the dynamic changes in groundwater. Its core functions include measuring water level, pore pressure, permeability, and sampling, and it is widely used in resource assessment, pollution control, and ecological protection. During groundwater monitoring, necessary sampling is required. Due to the heterogeneity of aquifers, groundwater pollution often exhibits stratification, meaning that strata at different depths have different pollution characteristics. To analyze groundwater pollution in more detail, stratified sampling is necessary. Traditional devices struggle to collect groundwater samples from different depths simultaneously, resulting in low sampling efficiency and accuracy. Therefore, this project was developed to address these issues. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a negative pressure groundwater stratification sampling device, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure groundwater stratification sampling device, comprising a frame, an L-shaped support at the top of the frame, a reel rotatably mounted on the L-shaped support, a measuring rope wound on the reel, a servo drive assembly connected to one end of the reel, the output end of the servo drive assembly fixedly connected to a support shaft of the reel, a sampling cylinder suspended at the lower end of the measuring rope, a plurality of negative pressure sampling components arranged at fixed intervals inside the sampling cylinder, the open end of the negative pressure sampling components penetrating the side wall of the sampling cylinder, a battery and a controller disposed inside the sampling cylinder, both the controller and the battery being connected to the negative pressure sampling components, and a counterweight disposed at the bottom of the sampling cylinder.

[0005] The aforementioned negative pressure sampling assembly includes a sampling tube, an inlet tube, a sliding pull-out component, and a pumping control component. The sampling tube is vertically arranged inside the sampling cylinder. One end of the inlet tube is connected to the lower end of the sampling tube, and the other end extends through the side wall of the sampling cylinder to the outside of the sampling cylinder. One end of the sliding pull-out component extends into the sampling tube and slides and seals against the inner wall of the sampling tube. The pumping control component is located on one side of the inlet tube, and its moving end is connected to the exposed end of the sliding pull-out component.

[0006] The aforementioned sliding pull-out component includes a rubber piston, a pull rod, and a connector. The rubber piston is slidably inserted into the sampling tube. One end of the pull rod is fixedly connected to the rubber piston, and the other end passes through the top surface of the sampling tube. The connector is installed on the exposed end of the pull rod.

[0007] The aforementioned extraction control component includes a fixed base, a transmission screw, and a movable base. The fixed base is located on one side of the sampling tube, the transmission screw is rotatably mounted on the fixed base, the movable base is slidably engaged with the fixed base via a guide post, and the movable base is threadedly engaged with the transmission screw via a screw nut. One end of the movable base is assembled and fixed to a connector, and the exposed end of the transmission screw is connected to the drive end of a micro servo motor.

[0008] The aforementioned servo drive assembly includes a servo drive motor mounted on an L-shaped support. The drive end of the servo drive motor is connected to a reducer, and the output end of the reducer is equipped with an output shaft. One end of the output shaft is fixedly connected to the exposed end of the reel's shaft.

[0009] The aforementioned support frame is equipped with a battery and a control panel on its side. Beneficial effects

[0010] This invention provides a negative pressure groundwater stratified sampling device. It offers the following advantages: Powered by a servo drive assembly, and in conjunction with a reel and measuring rope, the device adjusts the vertical position of the sampling tube. During use, the stand is moved to the measurement position and then fixed. After fixing, the reel is controlled to release the measuring rope, allowing the sampling tube to descend below the water surface under gravity. Once the sampling tube reaches the set sampling depth, the ground station sends a command to the controller, activating the negative pressure sampling assembly to extract water samples from the corresponding strata into the appropriate sampling tube. The device is compact, highly automated, and can extract water samples from multiple strata simultaneously, significantly improving sampling efficiency compared to traditional separate sampling methods. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of the negative pressure groundwater stratified sampling device of this utility model.

[0012] Figure 2 This is a side view of the negative pressure groundwater stratified sampling device of this utility model.

[0013] Figure 3 This is a cross-sectional view of the sampling tube described in this utility model.

[0014] Figure 4 This utility model Figure 3 A partially enlarged structural diagram.

[0015] In the diagram: 1. Stand; 2. L-shaped support; 3. Reel; 4. Measuring rope; 5. Sampling cylinder; 6. Battery; 7. Controller; 8. Counterweight; 9. Sampling tube; 10. Inlet tube; 11. Rubber piston; 12. Pull rod; 13. Connector; 14. Fixed base; 15. Transmission screw; 16. Moving base; 17. Guide column; 18. Miniature servo motor; 19. Servo drive motor; 20. Reducer; 21. Output shaft; 22. Battery; 23. Control panel. Detailed Implementation

[0016] 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.

[0017] Example: Refer to the appendix of the instruction manual Figure 1-4 As can be seen, this application specifically designs a negative pressure groundwater stratification sampling device. An L-shaped support 2 is installed at the top of the frame 1, and a reel 3 is rotatably mounted on the L-shaped support 2. A measuring rope 4 is wound around the reel 3. One end of the reel 3 is connected to a servo drive component, and the output end of the servo drive component is fixedly connected to a support shaft of the reel 3. A sampling cylinder 5 is suspended at the lower end of the measuring rope 4. Several negative pressure sampling components are arranged at fixed intervals inside the sampling cylinder 5. The open ends of the negative pressure sampling components penetrate the side wall of the sampling cylinder 5. A battery 6 and a controller 7 are installed inside the sampling cylinder 5, and both the controller 7 and the battery 6 are connected to the negative pressure sampling components. A counterweight is installed at the bottom of the sampling cylinder 5. Block 8, powered by a servo drive component, works with reel 3 and measuring rope 4 to adjust the vertical position of sampling cylinder 5. During use, the stand 1 is moved to the measurement position and then fixed. After fixing, the reel 3 is controlled to release the measuring rope 4, allowing the sampling cylinder 5 to descend below the water surface under gravity. When the sampling cylinder 5 reaches the set sampling depth, the ground station sends a command to the controller 7, activating the negative pressure sampling component to draw water samples from the corresponding layer into the corresponding sampling tube 9. The system is compact, highly automated, and can complete the extraction of water samples from multiple layers at once, significantly improving sampling efficiency compared to traditional separate sampling operations.

[0018] In practical implementation, the aforementioned negative pressure sampling assembly includes a sampling tube 9, an inlet tube 10, a sliding pull-out component, and a suction / extraction control component. The sampling tube 9 is vertically positioned inside the sampling cylinder 5. One end of the inlet tube 10 is connected to the lower end of the sampling tube 9, and the other end extends through the side wall of the sampling cylinder 5 to the outside of the sampling cylinder 5. One end of the sliding pull-out component extends into the sampling tube 9 and slides in a seal against the inner wall of the sampling tube 9. The suction / extraction control component is located on one side of the inlet tube 10, and its moving end is connected to the exposed end of the sliding pull-out component. The sliding pull-out component includes a rubber piston 11, a pull rod 12, and a connector 13. The rubber piston 11 is slidably inserted into the sampling tube 9. One end of the pull rod 12 is fixedly connected to the rubber piston 11, and the other end passes through the top surface of the sampling tube 9. The connector 13 is installed on the exposed end of the pull rod 12. The aforementioned extraction control component includes a fixed seat 14, a transmission screw 15, and a movable seat 16. The fixed seat 14 is located on one side of the sampling tube 9, the transmission screw 15 is rotatably mounted on the fixed seat 14, and the movable seat 16 is connected via... The guide post 17 is slidably engaged with the fixed seat 14. The movable seat 16 is threadedly engaged with the transmission screw 15 through the screw nut. One end of the movable seat 16 is assembled and fixed with the connector 13. The exposed end of the transmission screw 15 is connected to the drive end of the micro servo motor 18. When the sampling cylinder 5 reaches the sampling depth, the control reel 3 stops rotating and the sampling cylinder 5 stops at the current position. The controller 7 issues a command to control the drive end of the micro servo motor 18 to rotate, thereby driving the transmission screw 15 to rotate. The rotation of the transmission screw 15 causes the movable seat 16 to move upward under the combined limiting action of the guide posts 17 on both sides and the screw nut. During the upward movement of the movable seat 16, the connector 13 connected to it is pulled upward. The upward movement of the connector 13 pulls the pull rod 12 and the rubber piston 11 to move downward synchronously. The upward movement of the rubber piston 11 causes a negative pressure to be generated in the sampling tube 9. Under the action of the negative pressure, the water sample of the corresponding layer is sucked into the sampling tube 9 through the sample inlet tube 10, thereby completing the stratified sampling operation at different water depths.

[0019] In the specific implementation process, the above-mentioned servo drive component includes a servo drive motor 19 mounted on an L-shaped support 2. The drive end of the servo drive motor 19 is connected to a reducer 20, and the output end of the reducer is equipped with an output shaft 21. One end of the output shaft 21 is fixedly connected to the exposed end of the rotating shaft of the reel 3. A battery 22 and a control panel 23 are installed on the side of the support frame 1. The battery 22 supplies power to the servo drive motor 19, and the control panel 23 controls the servo drive motor 19. The servo drive motor 19 and the reducer work together to drive the output shaft 21 to rotate, thereby realizing the forward or reverse rotation of the reel 3, thereby realizing the release or retrieval operation of the measuring rope 4, and thus making the lower sampling cylinder 5 at different water depths.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure groundwater stratified sampling device, comprising a frame, characterized in that, The top of the support frame is provided with an L-shaped support, on which a reel is rotatably mounted. A measuring rope is wound on the reel, and one end of the reel is connected to a servo drive component. The output end of the servo drive component is fixedly connected to a support shaft of the reel. A sampling cylinder is suspended at the lower end of the measuring rope. Several negative pressure sampling components are arranged at fixed intervals inside the sampling cylinder. The opening end of the negative pressure sampling component penetrates the side wall of the sampling cylinder. A battery and a controller are provided inside the sampling cylinder. The controller and the battery are both connected to the negative pressure sampling components. A counterweight is provided at the bottom of the sampling cylinder.

2. The negative pressure groundwater stratified sampling device according to claim 1, characterized in that, The negative pressure sampling assembly includes a sampling tube, an inlet tube, a sliding pull-out component, and a pumping control component. The sampling tube is vertically arranged inside the sampling cylinder. One end of the inlet tube is connected to the lower end of the sampling tube, and the other end extends through the side wall of the sampling cylinder to the outside of the sampling cylinder. One end of the sliding pull-out component extends into the sampling tube and slides and seals against the inner wall of the sampling tube. The pumping control component is located on one side of the inlet tube, and its moving end is connected to the exposed end of the sliding pull-out component.

3. The negative pressure groundwater stratified sampling device according to claim 2, characterized in that, The sliding pull-out component includes a rubber piston, a pull rod, and a connector. The rubber piston is slidably inserted into the sampling tube. One end of the pull rod is fixedly connected to the rubber piston, and the other end passes through the top surface of the sampling tube. The connector is installed on the exposed end of the pull rod.

4. The negative pressure groundwater stratified sampling device according to claim 3, characterized in that, The extraction control component includes a fixed base, a transmission screw, and a movable base. The fixed base is located on one side of the sampling tube. The transmission screw is rotatably mounted on the fixed base. The movable base is slidably engaged with the fixed base through a guide post. The movable base is threadedly engaged with the transmission screw through a screw nut. One end of the movable base is assembled and fixed to a connector. The exposed end of the transmission screw is connected to the drive end of a micro servo motor.

5. The negative pressure groundwater stratified sampling device according to claim 1, characterized in that, The servo drive assembly includes a servo drive motor mounted on an L-shaped support. The drive end of the servo drive motor is connected to a reducer, and the output end of the reducer is equipped with an output shaft. One end of the output shaft is fixedly connected to the exposed end of the reel's shaft.

6. The negative pressure groundwater stratified sampling device according to claim 1, characterized in that, A battery and control panel are installed on the side of the support frame.

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