A groundwater sampler
Patent Information
- Application Number
- CN202522307256.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0003]针对以上问题，本实用新型提供一种地下水采样器，解决当前地下水采样中，对贝勒管的提放多依赖人工或简易机械辅助，存在人工操作效率低、劳动强度大，收放线长度与采样深度监测不准确影响水样代表性，以及现有机械辅助装置缺乏协同控制能力、自动化程度低的问题
[0005]本实用新型的有益效果为：将牵引线的一端系挂在贝勒管上后，装置可自动收放线提放贝勒管，方便于地下水的取样；当牵引线的张紧度随着贝勒管与水面的接触状态而变化时，控制器可收集处理监测组件反馈的牵引线的张紧度信息而控制贝勒管的提放速度和时机，从而实现取样的高效自动化。
Smart Images
Figure CN224802720U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of groundwater sampling technology, and specifically relates to a groundwater sampler. Background Technology
[0002] In groundwater environmental monitoring, pollution investigation, and hydrogeological exploration, groundwater sampling is a crucial step in obtaining water quality data. As a commonly used groundwater sampling tool, the ease and accuracy of its placement and extraction directly impacts sampling efficiency and data reliability. Currently, the industry primarily uses manual operation or simple mechanical assistance for placing and extracting Behler tubes, which presents the following problems: First, traditional sampling methods rely excessively on manual labor, resulting in low operational efficiency and high labor intensity. In existing technologies, workers must manually hold the traction line to lift and lower the Bayle tube. For deep well sampling (e.g., depths exceeding 30 meters), a single sampling requires repeated pulling of the traction line, which not only consumes a great deal of physical strength but also easily leads to uneven lifting and lowering speeds due to hand fatigue. Lifting and lowering too quickly may cause water samples to overflow from the Bayle tube, while lifting and lowering too slowly prolongs the sampling cycle. This inefficiency is particularly pronounced when conducting batch sampling (e.g., collecting water samples from more than 10 monitoring wells in the same area), making it difficult to meet the time requirements of large-scale monitoring tasks. Secondly, inaccurate monitoring of the length of the traction line and the sampling depth affects the representativeness of the water samples. In traditional sampling, the sampling depth is often achieved by manually marking the traction line (e.g., tying knots every 1 meter) or estimating the number of traction loops, which has a large margin of error. On the one hand, the traction line is prone to elastic elongation over long-term use, and the marking position will shift with the elongation, resulting in a depth measurement deviation of up to 5%-10%. On the other hand, when manually counting the number of traction loops, it is easy to miss or overcount due to lack of concentration, especially in deep well sampling, where the cumulative number of loops will further amplify the error. Groundwater sampling has extremely high requirements for depth accuracy (e.g., collecting water samples at a specific aquifer at a depth of 10.0 ± 0.5 meters). Depth errors will result in the collected water sample not being from the target aquifer, directly affecting the accuracy of the water quality analysis results. Finally, existing mechanical auxiliary devices lack collaborative control capabilities and have a low degree of automation. Although some simple mechanical devices can automate the winding and unwinding of the wire, they do not integrate tension monitoring and depth monitoring functions: for example, they only drive the reel to wind and unwind the wire by a motor, and cannot adjust the motor speed according to changes in tension, still requiring manual monitoring to determine the sampling timing; moreover, depth monitoring mostly relies on independent depth sounders, requiring staff to manually record depth data, and cannot be linked with the winding and unwinding mechanism, making it difficult to achieve integrated automation of "tension monitoring-depth recording-motor control", still requiring a lot of manual intervention, and failing to fundamentally solve the efficiency and accuracy problems of traditional sampling. Utility Model Content
[0003] To address the above problems, this utility model provides a groundwater sampler that solves the current problems in groundwater sampling, where the lifting and lowering of the Beile tube relies heavily on manual labor or simple mechanical assistance. These problems include low efficiency and high labor intensity of manual operation, inaccurate monitoring of the length of the lead-in and lead-out line and the sampling depth affecting the representativeness of the water sample, and the lack of collaborative control capabilities and low degree of automation of existing mechanical auxiliary devices.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A groundwater sampler includes a base, on which a servo motor and a controller are mounted, and a take-up shaft and a main rotating shaft are rotatably mounted. A wire feeding reel is mounted on the take-up shaft, and one end of the traction line is wound and connected to the outer side of the wire feeding reel. The take-up shaft is connected to the servo motor via a belt drive mechanism. A front connecting rod and a rear connecting rod are fixed at both ends of the main rotating shaft, respectively. A guide wheel is mounted on the end of the front connecting rod away from the main rotating shaft, and the guide wheel rolls to support the traction line. A monitoring component is connected to the end of the rear connecting rod away from the main rotating shaft. The take-up shaft is connected to the rotating shaft of an encoder via a coupling. The encoder is mounted on a bracket, and the bracket and the monitoring component are mounted on the base.
[0005] The beneficial effects of this utility model are as follows: after one end of the traction line is tied to the Bayle tube, the device can automatically retract and extend the line to lift and extend the Bayle tube, which facilitates groundwater sampling; when the tension of the traction line changes with the contact state between the Bayle tube and the water surface, the controller can collect and process the tension information of the traction line fed back by the monitoring component to control the lifting and extending speed and timing of the Bayle tube, thereby achieving efficient automation of sampling.
[0006] To ensure stable monitoring of the tension of the traction line through the use of monitoring components; As a further improvement to the above technical solution: the monitoring component includes a tension sensor, and the two internal threaded holes at the upper and lower ends of the tension sensor are respectively threaded to ball joint one and ball joint two. One end of the ball joint seat and one end of the ball head in ball joint one are both connected to a screw, and the screws in the ball joint seat and the ball head are respectively threaded to the rear connecting rod and the tension sensor. One end of the ball joint seat and one end of the ball head in ball joint two are both connected to a screw, and the screws in the ball joint seat and the ball head are respectively threaded to the base and the tension sensor.
[0007] The beneficial effects of this improvement are as follows: when the tension of the traction line changes due to the contact and separation of the Beller tube from the water, the guide wheel supporting the traction line drives the main rotating shaft to rotate through the front connecting rod. When the main rotating shaft rotates, it pulls the tension sensor through the rear connecting rod. The use of ball joint one and ball joint two effectively ensures the stability of the tension sensor monitoring when the rear connecting rod rotates.
[0008] To avoid the base obstructing the lifting and lowering of the Belle tube; As a further improvement to the above technical solution: the guide wheel is located in front of the base, and the distance between the vertical projection of the front end of the guide wheel and the front end of the base on the same horizontal plane is not less than 10cm.
[0009] The beneficial effects of this improvement are: the common specifications of the Bayer tube always maintain a suitable horizontal distance from the base during the lifting and lowering of the traction line, avoiding obstruction by the base and affecting the sampling work.
[0010] In order to achieve automatic control operation of the device; As a further improvement to the above technical solution: the controller includes a touch screen module, a PLC, a relay and a motor controller, the monitoring component is electrically connected to the PLC, and the servo motor is electrically connected to the relay and the motor controller.
[0011] The beneficial effects of this improvement are as follows: After the PLC in the controller receives and processes the tension signal of the traction line fed back by the monitoring component, the motor controller receives the control command from the PLC to perform fine control on the running status of the servo motor. At the same time, it monitors the status of the servo motor. If a fault occurs, it first cuts off its own output and then controls the relay to disconnect the main power supply, thus achieving dual protection.
[0012] In order to achieve accurate monitoring of sampling depth; As a further improvement to the above technical solution: the encoder is electrically connected to the PLC.
[0013] The beneficial effects of this improvement are: the encoder's rotating shaft rotates synchronously with the take-up shaft, thereby enabling the monitoring of the number of turns of the traction line wound and unwound on the pay-off reel; the PLC receives and processes the signal fed back by the encoder and sends it to the touch screen to achieve accurate monitoring of the real-time position of the Beller tube.
[0014] To ensure the reliability of the transmission between the servo motor and the take-up shaft; As a further improvement to the above technical solution: the belt drive mechanism is a toothed synchronous belt drive mechanism, wherein the driving pulley and the driven pulley in the belt drive mechanism are respectively fixed on the output shaft and the winding shaft of the servo motor.
[0015] The beneficial effects of this improvement are: the toothed synchronous belt drive mechanism can ensure stable synchronous transmission between the servo motor and the take-up shaft, avoiding problems such as reduced accuracy of tension detection and inaccurate measurement of take-up and unwinding lengths caused by slippage.
[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the monitoring component in this utility model.
[0018] In the diagram: 1. Base; 2. Servo motor; 3. Belt drive mechanism; 4. Rewind shaft; 5. Pay-off reel; 6. Traction line; 7. Main rotating shaft; 8. Front connecting rod; 9. Guide wheel; 10. Rear connecting rod; 11. Monitoring component; 111. Tension sensor; 112. Ball joint one; 113. Ball joint two; 12. Coupling; 13. Encoder; 14. Bracket; 15. Controller. Detailed Implementation
[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.
[0020] Example 1: like Figure 1As shown in Figure 3: A groundwater sampler includes a base 1, on which a servo motor 2 and a controller 15 are mounted, and a take-up shaft 4 and a main rotating shaft 7 are rotatably mounted. A wire feeding reel 5 is mounted on the take-up shaft 4, and one end of a traction line 6 is wound and connected to the outer side of the wire feeding reel 5. The take-up shaft 4 is connected to the servo motor 2 via a belt drive mechanism 3. A front connecting rod 8 and a rear connecting rod 10 are fixed at both ends of the main rotating shaft 7, respectively. A guide wheel 9 is mounted on the end of the front connecting rod 8 away from the main rotating shaft 7, and the guide wheel 9 rolls to support the traction line 6. The end of the rear connecting rod 10 away from the main rotating shaft 7 is connected to a monitoring component 11. The take-up shaft 4 is connected to the rotating shaft of an encoder 13 via a coupling 12. The encoder 13 is mounted on a bracket 14, and the bracket 14 and the monitoring component 11 are mounted on the base 1. After one end of the traction line 6 is attached to the Bayler tube, the device can automatically reel in and release the line to lift and lower the Bayler tube, facilitating groundwater sampling. When the tension of the traction line 6 changes with the contact state between the Bayler tube and the water surface, the controller 15 can collect and process the tension information of the traction line 6 fed back by the monitoring component 11 to control the lifting and lowering speed and timing of the Bayler tube, thereby achieving efficient and automated sampling. The monitoring component 11 includes a tension sensor 111. The two internal threaded holes at the upper and lower ends of the tension sensor 111 are respectively threaded to ball joint one 112 and ball joint two 113. One end of the ball joint seat and one end of the ball joint head in ball joint one 112 are connected to a screw, and the screws in the ball joint seat and the ball joint head are respectively threaded to the connecting rod 10 and the tension sensor 111. One end of the ball joint seat and one end of the ball joint head in ball joint two 113 are connected to a screw, and the screws in the ball joint seat and the ball joint head are respectively threaded to the base 1 and the tension sensor 111. When the tension of the traction line 6 changes due to the contact and detachment of the Bayler tube from the water, the guide wheel 9 supporting the traction line 6 drives the main rotating shaft 7 to rotate via the front connecting rod 8. When the main rotating shaft 7 rotates, it pulls the tension sensor 111 via the rear connecting rod 10. The use of ball joints 112 and 113 effectively ensures the stability of the tension sensor 111's monitoring when the rear connecting rod 10 rotates. The guide wheel 9 is located in front of the base 1, and the distance between the front end of the guide wheel 9 and the front end of the base 1 on the same horizontal plane is not less than 10cm. Commonly sized Bayler tubes maintain a suitable horizontal distance from the base 1 during the lifting and lowering of the traction line 6, avoiding obstruction by the base 1 and affecting the sampling work. The controller 15 includes a touch screen module, a PLC, a relay, and a motor controller. The monitoring component 11 is electrically connected to the PLC, and the servo motor 2 is electrically connected to the relay and the motor controller.After the PLC in controller 15 receives and processes the tension signal of the traction line 6 fed back by monitoring component 11, the motor controller receives the control command from the PLC to finely control the operating status of the servo motor 2 and monitor the status of the servo motor 2. If a fault occurs, it first cuts off its own output and then controls the relay to disconnect the main power supply, achieving dual protection. The encoder 13 is electrically connected to the PLC. The rotating shaft of the encoder 13 rotates synchronously with the take-up shaft 4, thereby realizing the monitoring of the number of turns of the traction line 6 on the pay-off reel 5. After receiving and processing the signal fed back by the encoder 13, the PLC sends it to the touch screen to realize accurate monitoring of the real-time position of the Beller tube. The belt drive mechanism 3 is a toothed synchronous belt drive mechanism. The driving pulley and driven pulley in the belt drive mechanism 3 are respectively fixed on the output shaft of the servo motor 2 and the take-up shaft 4. The toothed synchronous belt drive mechanism can ensure stable synchronous transmission between the servo motor 2 and the take-up shaft 4, avoiding problems such as reduced tension detection accuracy and inaccurate measurement of take-up and pay-off lengths due to slippage.
[0021] The beneficial effects of this utility model are as follows: after one end of the traction line 6 is tied to the Bayle tube, the device can automatically reel in and release the line to lift and release the Bayle tube, which facilitates groundwater sampling; when the tension of the traction line 6 changes with the contact state between the Bayle tube and the water surface, the controller 15 can collect and process the tension information of the traction line 6 fed back by the monitoring component 11 to control the lifting and releasing speed and timing of the Bayle tube, thereby achieving efficient automation of sampling.
[0022] The working principle of this technical solution is as follows: by clicking the drop command on the touch screen in the controller 15, the PLC sends the "low speed drop" command to the motor controller. The servo motor 2 drives the take-up shaft 4 to rotate counterclockwise through the belt transmission mechanism 3. The pay-off reel 5 pays off the wire synchronously, which drives the Belle tube hanging on the traction line 6 to start to slowly drop. The initial drop speed is set to 0.5 m / s. During the descent, tension sensor 111 collects the tension signal of traction line 6 in real time and transmits the data to PLC: When the Bayler tube just touches the water surface, buoyancy causes the tension to drop to 80% of the reference value. After receiving this signal, PLC immediately sends a "decelerate" command to the motor controller, reducing the descent speed to 0.2 m / s to prevent the Bayler tube from hitting the water surface too quickly and splashing water samples. As descent continues, the Bayler tube is gradually submerged, and the tension stabilizes between 90% and 95% of the reference value. PLC controls the motor to maintain a uniform descent speed. When the sampling depth displayed on the touch screen reaches the preset target value, such as 15 meters, PLC sends a "stop descent" command, servo motor 2 is powered off, and reel 4 stops rotating. The Bayler tube remains at the target depth. The dwell time can be set according to the water sample filling requirements to ensure that the Bayler tube is completely filled with water samples. After the dwell time ends, the PLC automatically sends a "low-speed lift" command to the motor controller. The servo motor 2 rotates clockwise, the reel 4 retracts the traction line 6, and the Beller tube begins to lift. The initial lifting speed is set to 0.3 m / s. During the lifting process, the PLC continuously monitors the tension and depth data: when the Bayler tube leaves the water surface, the increased gravity causes the tension to rise sharply to the preset threshold of 120% of the baseline value. The PLC immediately controls the lifting speed to be reduced to 0.1 m / s to prevent the traction line 6 from breaking due to the sudden increase in force. At the same time, the encoder 13 records the number of rotations of the winding shaft 4 in real time. The PLC calculates the lifting height based on the number of rotations and the circumference of the pay-off reel 5. The touch screen displays the real-time depth synchronously. When the depth drops to 0 meters, that is, when the Bayler tube is completely pulled out of the wellhead, the PLC sends a "stop lifting" command, and the servo motor 2 stops running. The staff untied the traction line 6 from the top ring of the Belle tube, slowly tilted the Belle tube, opened the bottom drain valve, and poured the water sample into the pre-prepared sampling bottle to complete the water sample collection.
[0023] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0024] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.
Claims
1. A groundwater sampler, characterized in that: The system includes a base (1), on which a servo motor (2) and a controller (15) are mounted, and a take-up shaft (4) and a main rotating shaft (7) are rotatably mounted. A wire feeding reel (5) is mounted on the take-up shaft (4), and the outer side of the wire feeding reel (5) is wound and connected to one end of the traction line (6). The take-up shaft (4) is connected to the servo motor (2) via a belt drive mechanism (3). A front connecting rod (8) and a rear connecting rod (10) are fixed at both ends of the main rotating shaft (7). A guide wheel (9) is mounted on the end of the front connecting rod (8) away from the main rotating shaft (7), and the guide wheel (9) rolls to support the traction line (6). A monitoring component (11) is connected to the end of the rear connecting rod (10) away from the main rotating shaft (7). The take-up shaft (4) is connected to the rotating shaft of an encoder (13) via a coupling (12). The encoder (13) is mounted on a bracket (14), and the bracket (14) and the monitoring component (11) are mounted on the base (1).
2. A groundwater sampler according to claim 1, characterized in that: The monitoring component (11) includes a tension sensor (111). The two internal threaded holes at the upper and lower ends of the tension sensor (111) are respectively threaded to ball joint one (112) and ball joint two (113). One end of the ball joint seat and one end of the ball head in ball joint one (112) are connected to a screw, and the screw in the ball joint seat and the ball head are respectively threaded to the rear connecting rod (10) and the tension sensor (111). One end of the ball joint seat and one end of the ball head in ball joint two (113) are connected to a screw, and the screw in the ball joint seat and the ball head are respectively threaded to the base (1) and the tension sensor (111).
3. A groundwater sampler according to claim 1, characterized in that: The guide wheel (9) is located in front of the base (1), and the distance between the front end of the guide wheel (9) and the front end of the base (1) on the same horizontal plane is not less than 10cm.
4. A groundwater sampler according to claim 1, characterized in that: The controller (15) includes a touch screen module, a PLC, a relay and a motor controller. The monitoring component (11) is electrically connected to the PLC, and the servo motor (2) is electrically connected to the relay and the motor controller.
5. A groundwater sampler according to claim 1, characterized in that: The encoder (13) is electrically connected to the PLC.
6. A groundwater sampler according to claim 1, characterized in that: The belt drive mechanism (3) is a toothed synchronous belt drive mechanism. The driving pulley and the driven pulley in the belt drive mechanism (3) are respectively fixed on the output shaft and the winding shaft (4) of the servo motor (2).