A sterile water sample collection system and method for water pollution detection

Abstract

The application discloses a sterile water sample collection system and method for water pollution detection, relates to the technical field of water pollution detection, and is used for solving the problems that the prior art can only sample one bottle at a time, the continuous sampling efficiency is low, and on-site operation is inconvenient. The sterile water sample collection system for water pollution detection comprises a telescopic sleeve, a basket arranged at one end of the telescopic sleeve away from a shore, a traction rope connected between the telescopic sleeve and the basket, and a negative pressure bottle stored in the basket, a displacement mechanism capable of moving along the length direction of the telescopic sleeve, and the like. The displacement mechanism capable of moving along the length direction of the telescopic sleeve is arranged on the telescopic sleeve, and a bottle changing mechanism for storing a plurality of negative pressure bottles is arranged on the displacement mechanism, so that the sequential replenishment and sequential replacement of the plurality of negative pressure bottles can be continuously completed at the same sampling position after one-time arrangement, and thus the cumbersome operation of repeatedly recovering, refilling and lowering again for each sample collected in the existing manual telescopic rod sampling mode is avoided.

Description

Technical Field

[0001] This invention belongs to the field of water pollution detection technology, and specifically relates to a sterile water sample collection system and method for water pollution detection. Background Technology

[0002] In the field of water pollution detection, water sampling is a fundamental and crucial step affecting the accuracy and comparability of test results. In scenarios such as rivers, lakes, and drainage outlets, sampling points are often located below the bank or outside the slope, making it difficult for sampling personnel to directly approach the water surface to collect samples. On-site operations place high demands on sampling distance, operational stability, and sampling efficiency.

[0003] In existing technologies, manual sampling methods often employ telescopic poles combined with ropes and sampling mechanisms. Specifically, the sampling mechanism is lowered to the target water area using a telescopic pole, and water samples are collected and then retrieved. This type of device can, to some extent, solve the sampling problem under conditions of varying elevations along the shore. It has the advantages of relatively simple structure and low operating cost, and is therefore widely used in temporary field sampling scenarios.

[0004] However, the aforementioned devices typically only allow for the collection of a single water sample at a time. When testing requires the continuous collection of multiple samples or parallel samples, repeated lowering, retrieval, and container replacement operations are necessary, resulting in a cumbersome and inefficient process. Furthermore, continuous operation in slope environments is inconvenient and fails to meet the practical needs of continuous sampling. Summary of the Invention

[0005] In view of the above analysis, the present invention aims to provide a sterile water sample collection system and method for water pollution detection, so as to solve one or more of the above-mentioned problems existing in the prior art.

[0006] The objective of this invention is achieved as follows: On the one hand, a sterile water sample collection system for water pollution detection is provided, comprising: Telescopic sleeve; A suspended basket is located at the end of the telescopic sleeve away from the shore, and a traction rope is connected to the telescopic sleeve. A negative pressure bottle is stored in the suspended basket. A displacement mechanism is provided on the telescopic sleeve and can move along the length direction of the telescopic sleeve; A bottle-changing mechanism is provided on the displacement mechanism and can move with the displacement mechanism. The bottle-changing mechanism stores multiple negative pressure bottles and is configured to replace the negative pressure bottles on the basket that have completed sampling. A lifting mechanism is located at the end of the telescopic sleeve furthest from the shore, used to lift the basket so that it can approach and dock with the bottle-changing mechanism.

[0007] Furthermore, a reel is rotatably connected to the telescopic sleeve, the traction rope is wound on the reel, a first motor is provided on the telescopic sleeve, and the output shaft of the first motor is drivenly connected to the reel; there are at least two traction ropes.

[0008] Furthermore, the bottom of the basket is provided with a connection opening, the bottom of the negative pressure bottle is connected to a suction tube, a connecting sleeve is slidably fitted on the outside of the suction tube, a first spring is connected between the connecting sleeve and the suction tube, a piston is provided inside the connecting sleeve, the piston is movably located inside the suction tube, and can block and open the water inlet of the suction tube.

[0009] Furthermore, a first cylinder is provided at the bottom of the suspended basket, and a pusher is connected to the output shaft of the first cylinder, with the pusher located at the top of the connecting sleeve.

[0010] Furthermore, a second cylinder is provided at the top of the suspended basket, and the output shaft of the second cylinder extends into the interior of the suspended basket and is connected to a pressure plate.

[0011] Furthermore, the displacement mechanism includes a movable platform sleeved on the outside of the telescopic sleeve; The telescopic sleeve has multiple limiting grooves on its sidewall, which are respectively opened on the sidewall of multiple telescopic joints, and a transition slope is formed between adjacent limiting grooves. The movable platform is slidably connected to two sides of the platform, and a roller is rotatably connected to the support. The roller is embedded in the limiting groove, and a second spring is provided between the support and the movable platform. The bracket is also equipped with a second motor, and the output shaft of the second motor is connected to the roller drive.

[0012] Furthermore, the bottle changing mechanism includes a connecting frame connected to the bottom of the moving platform, and a switching frame is rotatably connected to the bottom of the connecting frame, with an clearance opening provided on the switching frame; The switching frame is equipped with multiple third cylinders, and a pusher is connected to the telescopic shaft of the third cylinder. The pusher is equipped with a clamp, and the negative pressure bottle is inverted and clamped on the clamp. The suction tube on the negative pressure bottle is located inside the clearance opening.

[0013] Furthermore, the clamp is composed of multiple elastic strips, which surround to form an elastic holding part for clamping and limiting the negative pressure bottle.

[0014] Furthermore, a third motor is provided on the connecting frame, and the output shaft of the third motor is connected to the switching frame in a transmission manner.

[0015] Furthermore, a docking notch is provided on one side of the connecting frame, an electromagnet is provided in the docking notch, and an iron bar is provided on one side of the suspended basket.

[0016] Furthermore, a fourth cylinder is provided at the bottom of the switching frame, and an alignment top contact frame is connected to the output shaft of the fourth cylinder.

[0017] Furthermore, the lifting mechanism includes a rotating lifting frame rotatably connected to the telescopic sleeve, and a fourth motor is provided on the telescopic sleeve. The output shaft of the fourth motor is drively connected to the rotating shaft of the rotating lifting frame.

[0018] On the other hand, a method for collecting sterile water samples for water pollution detection is also provided, which uses the above-mentioned sterile water sample collection system for water pollution detection to collect sterile water samples.

[0019] Furthermore, the sterile water sample collection method includes the following steps: Adjust the extension length of the telescopic sleeve and support it with an auxiliary support frame to ensure the system extends stably toward the sampling water area; When the suspended platform is in an unoccupied state, control the lifting mechanism to lift the suspended platform to the predetermined docking position; The control displacement mechanism drives the bottle changing mechanism to move, so that the negative pressure bottle is connected to the basket and the negative pressure bottle is sent into the basket; The pressure plate is moved downward to press and position the negative pressure bottle that has entered the basket. Control the reel to unwind the traction rope, lower the basket to the target water level, and control the suction pipe to open so that the negative pressure bottle can collect water samples; After sampling is completed, the control reel winds up the traction rope and, in conjunction with the lifting mechanism, raises the basket to the bottle-changing docking position; The control bottle-changing mechanism retrieves the sampled negative pressure bottle and sends in a new negative pressure bottle, allowing the basket to enter the next sampling cycle.

[0020] Compared with the prior art, the sterile water sample collection system and method for water pollution detection provided by the present invention can achieve at least one of the following beneficial effects: 1. This invention, by incorporating a displacement mechanism that can move along the length of the telescopic sleeve and a bottle-changing mechanism that stores multiple negative pressure bottles on the displacement mechanism, enables the continuous replenishment and sequential replacement of multiple negative pressure bottles at the same sampling location after a single deployment. This avoids the cumbersome operation of repeatedly retrieving, refilling, and lowering the bottle after each sample collection, as required by existing manual telescopic pole sampling methods. Secondly, by moving the bottle-changing mechanism closer to the shore during the sampling phase, the cantilever load on the side of the telescopic sleeve furthest from the shore is significantly reduced, thereby improving the overall center of gravity distribution, reducing the operator's hand burden, and enhancing operational stability in scenarios with varying shore elevations. Furthermore, by moving the bottle-changing mechanism to the basket docking position during the bottle-changing phase, both continuous sampling and labor-saving hand operation can be achieved, effectively solving the technical problems of existing technologies that only allow single-bottle sampling at a time, have low continuous sampling efficiency, and are inconvenient for on-site operation.

[0021] 2. This invention, by setting a connection opening at the bottom of the basket and incorporating a suction tube, connecting sleeve, piston, and first spring at the bottom of the negative pressure bottle, ensures the negative pressure bottle remains sealed when not sampling. During actual sampling, a first cylinder drives a pusher to press down the connecting sleeve, opening the suction passage. This ensures the suction tube is only connected to external water when sampling is required, reducing the risk of sample leakage, external contamination, and premature release of negative pressure. Secondly, by setting a second cylinder and pressure plate at the top of the basket, the negative pressure bottle is stably compressed from top to bottom after entering the basket, reducing shaking, tilting, and displacement during lowering, lifting, and bottle changing, ensuring accurate fit between the suction tube and the basket's bottom structure. Furthermore, by creating multiple holes in the side and bottom walls of the basket, free flow of water is allowed when the basket is submerged, and excess liquid is promptly discharged during lifting and recovery, reducing the lifting burden and improving the stability and sealing reliability of the entire sampling structure.

[0022] 3. This invention, by incorporating a switching frame, a third motor, multiple third cylinders, and a clamp composed of multiple elastic strips in the bottle-changing mechanism, enables multiple negative pressure bottles to be sequentially rotated, pushed out, retrieved, and re-inserted within a limited space, thereby achieving orderly alternation between sampled negative pressure bottles and reducing the inefficiency and errors caused by manual bottle-by-bottle disassembly and assembly. Secondly, by setting docking notches and electromagnets on the connecting frame and iron bars on the basket, the basket can be quickly attracted and positioned after being lifted to the docking area, and then further aligned by the fourth cylinder driving the alignment top contact frame, thus reducing the swaying and positional deviation of the suspension structure during docking and improving the accuracy of negative pressure bottle handover. Furthermore, by employing a lifting method that combines reel winding with the top support traction rope of the rotating lifting frame, the basket first completes a large-stroke retrieval, then completes precise lifting at the end, maintaining a natural suspension state during docking, thereby improving the smoothness, stability, and reliability of continuous operation in the bottle-changing process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings. Figure 1 A schematic diagram of the overall structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 2 Another schematic diagram of the overall structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 3 A schematic diagram of the traction rope structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 4 A schematic diagram of the basket structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 5 A cross-sectional schematic diagram of the basket structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 6 A cross-sectional schematic diagram of the suction tube structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 7 A schematic diagram of the mobile stage structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 8 A cross-sectional schematic diagram of the mobile stage structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 9 A schematic diagram of the telescopic sleeve structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 10 A schematic diagram of the connecting frame structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 11 Another schematic diagram of the connecting frame structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 12 A cross-sectional schematic diagram of the connecting frame structure of the sterile water sample collection system for water pollution detection provided by the present invention; Figure 13 A schematic diagram of the fixture structure of the sterile water sample collection system for water pollution detection provided by the present invention.

[0024] Figure label: 100. Telescopic sleeve; 101. Suspended basket; 102. Traction rope; 103. Negative pressure bottle; 104. Displacement mechanism; 105. Bottle changing mechanism; 106. Lifting mechanism; 200. Reel; 201. First motor; 202. Connecting opening; 203. Suction tube; 204. Connecting sleeve; 205. First spring; 206. Piston; 207. First cylinder; 208. Push plate; 209. Second cylinder; 210. Pressure plate; 300. Moving stage; 301. Limiting groove; 302. Transition ramp; 303. Bracket; 304. Roller; 305. Second spring; 306. Second motor; 400. Connecting frame; 401. Switching frame; 402. Clearance opening; 403. Third cylinder; 404. Push frame; 405. Clamp; 406. Third motor; 500. Docking notch; 501. Electromagnet; 502. Iron bar; 503. Fourth cylinder; 504. Alignment top contact frame; 600. Rotary lifting frame; 601. Fourth motor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] To facilitate understanding of the embodiments of this application, further explanation and description will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this application. In the drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0027] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0028] Example 1

[0029] A specific embodiment of the present invention, such as Figures 1 to 13 As shown, a sterile water sample collection system for water pollution detection is disclosed, including a telescopic sleeve 100, a basket 101, a displacement mechanism 104, a bottle-changing mechanism 105, and a lifting mechanism 106. The telescopic sleeve 100 extends from the shore towards the sampling area, traversing a certain horizontal distance between the shore and the water surface. The basket 101 is located at the end of the telescopic sleeve 100 furthest from the shore, and a traction rope 102 connects the basket 101 to the telescopic sleeve 100. The basket 101 is configured to accommodate a negative pressure bottle 103, allowing the negative pressure bottle 103 to be lowered to the target area for water sample collection. The collected water sample is stored in the negative pressure bottle. After sampling, the negative pressure bottle 103 containing the water sample rises with the basket 101 to a designated position. The displacement mechanism 104 is mounted on the telescopic sleeve 100 and can move along the length of the telescopic sleeve 100. The bottle-changing mechanism 105 is mounted on the displacement mechanism 104 and can move synchronously with the displacement mechanism 104. The bottle-changing mechanism 105 holds multiple empty negative pressure bottles 103 and is configured to load the first empty negative pressure bottle 103 into the basket 101 during sampling, and to replace the negative pressure bottles 103 in the basket 101 that have completed sampling with the empty negative pressure bottles on the bottle-changing mechanism 105. The lifting mechanism 106 is located at the end of the telescopic sleeve 100 furthest from the shoreline and is used to lift the basket 101 during bottle changing, moving it from a downward sampling position to a docking position close to the bottle-changing mechanism 105.

[0030] Since the bottle changing mechanism 105 stores multiple negative pressure bottles 103, and the docking position of the basket 101 is relatively stable after being lifted by the lifting mechanism 106, in order for the different negative pressure bottles 103 on the bottle changing mechanism 105 to correspond to the basket 101 in sequence and complete the replacement, the displacement mechanism 104 needs to drive the bottle changing mechanism 105 to move along the length direction of the telescopic sleeve 100, so that each negative pressure bottle 103 moves to the docking position of the basket 101 in a predetermined order.

[0031] By setting up the displacement mechanism 104, on the one hand, it is not necessary to frequently adjust the overall position of the telescopic sleeve 100, nor is it necessary for operators to manually move the negative pressure bottles 103 one by one, thus enabling continuous replenishment and sequential replacement of multiple negative pressure bottles 103. On the other hand, since the bottle changing mechanism 105 stores multiple negative pressure bottles 103, it has a certain weight. On-site sampling is usually carried out by hand using the telescopic sleeve 100. If the bottle changing mechanism 105 is fixedly set at the end of the telescopic sleeve 100 away from the shore for a long time, it is easy to cause excessive load on the end of the telescopic sleeve 100, resulting in a large cantilever load at the far end. This not only increases the operator's holding burden but also easily causes the front end to fall, affecting the stability of operation during sampling. Therefore, a displacement mechanism 104 is installed to drive the bottle-changing mechanism 105 to move along the length of the telescopic sleeve 100. During sampling operations, the bottle-changing mechanism 105 can be moved closer to the shore to reduce the counterweight pressure at the far end of the telescopic sleeve 100, improve the overall center of gravity distribution, and enhance balance and ease of operation when held in hand. When it is necessary to replace the negative pressure bottle 103, the bottle-changing mechanism 105 is moved to the docking position close to the basket 101, so that the multiple negative pressure bottles 103 stored on the bottle-changing mechanism 105 can be replaced sequentially with the basket 101. Through the above method, both the effort-saving handling and operational stability during the sampling process can be taken into account, while the continuous replacement requirements during the bottle-changing process can be met, thereby improving the practicality and operational efficiency of continuous sampling on site.

[0032] In this embodiment, the telescopic sleeve 100 is a multi-section sleeved rod structure that is telescopically adjustable along its length. The telescopic sleeve 100 includes an outer sleeve, a middle sleeve that is slidably sleeved with the outer sleeve, and an inner sleeve that is slidably sleeved with the middle sleeve. The outer sleeve, middle sleeve, and inner sleeve extend sequentially in the direction away from the shore to adjust the overall extension length, thereby adapting to the usage requirements of different shore heights, slope gradients, and sampling point distances.

[0033] Optionally, the outer sleeve, intermediate sleeve, and inner sleeve can all adopt rectangular or square tube structures to limit circumferential rotation between each sleeve section and improve the overall stability of the suspended platform 101 during lowering and retrieval.

[0034] In another optional embodiment, locking components can be provided between the outer sleeve and the intermediate sleeve, and between the intermediate sleeve and the inner sleeve. These locking components are used to fix adjacent sleeves after the telescopic sleeve 100 is adjusted to the target length, to prevent retraction or shaking during sampling. Specifically, the locking components can adopt a pin-locking structure. Multiple positioning holes are spaced apart along the length direction on the corresponding sidewalls of the outer sleeve, intermediate sleeve, and inner sleeve. When adjacent sleeves are extended to the target position, the corresponding two positioning holes are aligned, and then the locking pin is inserted into the aligned positioning hole to limit and fix the adjacent sleeves.

[0035] In another embodiment, the locking component may also employ a threaded locking structure, specifically by screwing a locking bolt onto the outer sleeve, with the inner end of the locking bolt pressing against the outer wall of the adjacent inner sleeve to restrict relative sliding between adjacent sleeves.

[0036] In this embodiment, the middle and rear sections of the telescopic sleeve 100 are also provided with an auxiliary support frame, which is detachably connected to the telescopic sleeve 100. Specifically, the upper end of the auxiliary support frame can be connected to the telescopic sleeve 100 via snap-fit, plug-in, or bolt connection, so as to install and disassemble according to usage requirements. The lower end of the auxiliary support frame is used to cooperate with ground support. Preferably, the lower end of the auxiliary support frame is provided with a plug-in end, which can be inserted into the ground, so that the auxiliary support frame is stably supported on the shore ground; if the ground is hard or inconvenient to insert, the lower end of the auxiliary support frame can also be abutted against the ground via support feet. By setting the auxiliary support frame to be detachably connected to the telescopic sleeve 100, it is convenient to quickly assemble and disassemble during transportation, storage, and on-site deployment; by enabling the auxiliary support frame to be plugged into the ground or stably abutted against the ground, it can provide effective support for the middle and rear sections of the telescopic sleeve 100 after it is extended, thereby reducing the stress on the operator when holding it continuously and improving the stability of the telescopic sleeve 100 when suspended for sampling at the far end.

[0037] In one alternative embodiment, two telescopic sleeves 100 are provided, spaced apart and parallel to each other, and capable of extending in the sampling direction. A reinforcing rib is provided between the two telescopic sleeves 100, and the reinforcing rib is laterally connected between the two telescopic sleeves 100 along a direction intersecting the length direction of the telescopic sleeves 100, for fixing the two telescopic sleeves 100 together. The reinforcing rib is preferably located in the non-telescopic interference area of ​​the two telescopic sleeves 100, and can be located in at least three positions: first, near the end of the telescopic sleeve 100 away from the shore, for connecting and reinforcing the suspended end to improve the end stability of the suspended area of ​​the basket 101; second, in the middle region of the two telescopic sleeves 100, adjacent to the installation area of ​​the displacement mechanism 104 but offset from its movement path, for improving the overall rigidity of the area where the displacement mechanism 104 is located; and third, near the shore or near the support, for improving the structural strength of the operating end. With the above settings, the bending and torsional resistance of the overall frame can be improved and the sagging and swaying during cantilever extension can be reduced without affecting the telescopic cooperation of the two telescopic sleeves 100 and the reciprocating movement of the displacement mechanism 104.

[0038] The two telescopic sleeves 100 form an integral support structure, which can improve the lateral stiffness and bending strength of the overall structure and reduce the sagging deformation caused by the large cantilever length when extended. On the other hand, it can provide a more stable installation foundation for the displacement mechanism 104.

[0039] During sampling, the extension lengths of the two telescopic sleeves 100 are adjusted according to the distance between the sampling point on the shore and in the water area. The middle and rear sections are supported by an auxiliary support frame to ensure the sampling system is stably positioned between the shore and the sampling area. Before sampling, the bottle-changing mechanism 105 is moved closer to the shore to reduce the load on the far end and facilitate handheld control by the operator. Then, the negative pressure bottle 103 in the basket 101 is lowered to the target water level via the traction rope 102 to complete the sampling. After one sampling is completed, the lifting mechanism 106 is activated to raise the basket 101 to the docking position corresponding to the bottle-changing mechanism 105. Then, the displacement mechanism 104 moves the bottle-changing mechanism 105 along the telescopic sleeves 100, moving the next negative pressure bottle 103 to the docking position and replacing the sampled negative pressure bottle 103. After replacement, the displacement mechanism 104 switches to the next negative pressure bottle 103, and the basket 101 is lowered again for the next sampling. Through the above cycle, multiple negative pressure bottles 103 can be continuously replaced and sampled, while taking into account the balance and sampling stability during handheld operation.

[0040] In this embodiment, a reel 200 is rotatably connected to the telescopic sleeve 100. The reel 200 is used to wind and unwind the traction rope 102, which is wound around the outer circumference of the reel 200. Specifically, the reel 200 can be rotatably mounted on a mounting seat or support plate on the telescopic sleeve 100 via bearings, allowing the reel 200 to rotate stably relative to the telescopic sleeve 100. One end of the traction rope 102 is connected to the suspended basket 101, and the other end is fixed to the reel 200 and wound around the circumference of the reel 200, so that the length of the traction rope 102 changes when the reel 200 rotates, thereby controlling the lifting and lowering position of the suspended basket 101. By winding the traction rope 102 onto the reel 200, the lowering and retraction actions of the suspended basket 101 can be changed from a direct manual pulling method to a winding drive method, improving the controllability and operational stability of the traction process.

[0041] In this embodiment, a first motor 201 is provided on the telescopic sleeve 100. The first motor 201 is fixedly installed on the mounting position of the telescopic sleeve 100. The output shaft of the first motor 201 is connected to the reel 200 for driving the reel 200 to rotate. Preferably, the output shaft of the first motor 201 can be coaxially fixedly connected to the reel 200 to make the transmission structure more compact and the power transmission more direct; it can also be connected to the reel 200 through a gear transmission component, a synchronous belt transmission component, or a coupling to adapt to different installation spaces and transmission requirements. In addition to driving the reel 200 to rotate, the first motor 201 is also used to hold the reel 200 when driving stops, keeping the reel 200 in the current rotation position, thereby preventing the reel 200 from rotating in the opposite direction under the weight of the basket 101 and the negative pressure bottle 103. Specifically, the first motor 201 can be a motor with output holding function or a deceleration drive with reverse self-locking characteristics, so that after the first motor 201 stops outputting, the reel 200 can still remain relatively stationary, thus keeping the unwinding length of the traction rope 102 stable. With the above settings, when the first motor 201 is running in the forward direction, the reel 200 winds up the traction rope 102, thereby shortening the suspension length of the traction rope 102 and driving the basket 101 upward; when the first motor 201 is running in the reverse direction, the reel 200 unwinds the traction rope 102, thereby extending the suspension length of the traction rope 102 and moving the basket 101 downward to the target sampling position; when the first motor 201 stops, the reel 200 remains locked to prevent the basket 101 from sliding down on its own, thereby improving the stability of sampling positioning and the reliability of subsequent bottle replacement docking.

[0042] In another optional embodiment, the outer periphery of the reel 200 may be provided with an anti-decoupling limiting edge, which is located on both sides of the axial direction of the reel 200. This edge is used to limit the traction rope 102 from moving along the axial direction during winding and unwinding, so that the traction rope 102 is more neat during winding and avoids tangling or jamming.

[0043] Furthermore, two traction ropes 102 are provided. The two traction ropes 102 are wound around the outer circumference of the reel 200 at intervals along the axial direction of the reel 200 and connected to the top of the basket 101, so that the basket 101 forms a two-point suspension structure relative to the telescopic sleeve 100. By setting two traction ropes 102, on the one hand, the force on the basket 101 during the lowering and retrieval process can be more balanced, reducing the left and right swaying, front and back swaying and circumferential rotation that are easy to occur when suspended by a single traction rope 102, thereby improving the posture stability of the basket 101 during the lifting process; on the other hand, the two traction ropes 102 can form a guiding constraint on the basket 101, so that the basket 101 is less likely to deviate significantly when lifted by the lifting mechanism 106, and is more likely to move upward along the predetermined trajectory to the predetermined docking position. In this way, when the basket 101 approaches the bottle changing mechanism 105 to replace the negative pressure bottle 103, the positional correspondence accuracy between the basket 101 and the bottle changing mechanism 105 can be improved, the docking deviation can be reduced, and thus the stability of the bottle changing process and the reliability of the continuous sampling process can be improved.

[0044] Preferably, the two traction ropes 102 are arranged at relative intervals with respect to the central axis of the basket 101, so that the basket 101 maintains a relatively stable opening orientation in the suspended state, thereby facilitating the sliding of the negative pressure bottle 103 in the bottle changing mechanism 105 into the basket 101.

[0045] In this embodiment, a connecting opening 202 is provided at the bottom of the basket 101, and the connecting opening 202 communicates with the space for receiving the negative pressure bottle 103 inside the basket 101. The connecting opening 202 is used to provide a clearance channel for the negative pressure bottle 103 to enter and exit during the replacement of the negative pressure bottle 103, so that the negative pressure bottle 103 on the bottle changing mechanism 105 can slide into the basket 101 in a predetermined direction, and the negative pressure bottle 103 that has completed sampling can be removed from the basket 101, thereby facilitating continuous bottle changing operations.

[0046] Meanwhile, the connection opening 202 also provides space for the suction tube 203 at the bottom of the negative pressure bottle 103 and its external mating parts to avoid bottom interference during the loading, unloading and sampling of the negative pressure bottle 103.

[0047] A suction tube 203 is connected to the bottom of the negative pressure bottle 103. The suction tube 203 is used to communicate with an external water body to introduce the water sample to be collected into the negative pressure bottle 103. A connecting sleeve 204 is slidably sleeved on the outside of the suction tube 203. The connecting sleeve 204 can move axially relative to the suction tube 203. A first spring 205 is connected between the connecting sleeve 204 and the suction tube 203. The first spring 205 is used to apply a restoring force to the connecting sleeve 204, so that the connecting sleeve 204 maintains its initial position when not subjected to external pressure. A piston 206 is installed inside the connecting sleeve 204. The piston 206 seals and opens the inlet of the suction tube 203. Specifically, the piston 206 is located inside the connecting sleeve 204 and engages with the interior of the suction tube 203. When the connecting sleeve 204 is in its initial position, the piston 206 extends into the suction tube 203 to seal it, thus keeping the negative pressure bottle 103 relatively closed during replacement, handling, or standby, preventing the entry of external impurities, sample leakage, or premature release of negative pressure. During sampling, the connecting sleeve 204 moves and compresses the first spring 205. When compressed to a certain position, the piston 206 disengages from the sealing position of the suction tube 203 and moves outside the suction tube 203, changing the port of the suction tube 203 from a closed state to an open state. The flow channel of the suction tube 203 is opened, allowing the water sample to enter the negative pressure bottle.

[0048] In one alternative embodiment, a first cylinder 207 is provided at the bottom of the basket 101, and the first cylinder 207 is fixedly installed at the mounting position at the bottom of the basket 101. A pusher 208 is connected to the output shaft of the first cylinder 207, and the pusher 208 is located at the top of the connecting sleeve 204 and is correspondingly positioned to the upper end of the connecting sleeve 204. When the negative pressure bottle 103 is sent into the basket 101 and is in the sampling position, the output shaft of the first cylinder 207 extends downward, driving the pusher 208 to move downward and press the connecting sleeve 204, causing the connecting sleeve 204 to slide downward relative to the suction tube 203, while simultaneously compressing the first spring 205. During this process, the output thrust of the first cylinder 207 is greater than the holding force exerted by the negative pressure inside the negative pressure bottle 103 on the piston 206. This overcomes the blocking and holding state of the piston 206, driving it to move downward synchronously with the connecting sleeve 204 and gradually disengage from the blocking position of the suction tube 203, thus opening the flow channel of the suction tube 203. At this time, the negative pressure formed inside the negative pressure bottle 103 can then draw water samples from the outside through the suction tube 203, allowing the water samples to enter the negative pressure bottle 103 through the suction tube 203, thereby completing the sampling.

[0049] After sampling is completed, the first cylinder 207 retracts, the pusher 208 releases the downward pressure on the connecting sleeve 204, and the first spring 205 releases its elastic potential energy and pushes the connecting sleeve 204 upward to reset, allowing the piston 206 to re-enter the sealing position of the suction tube 203. Preferably, during a single sampling process, the liquid volume entering the negative pressure bottle 103 is less than the internal volume of the negative pressure bottle 103, so that after sampling is completed, a portion of air remains in the upper part of the negative pressure bottle 103 to form a gas buffer space. In this way, when the piston 206 resets with the connecting sleeve 204 and re-inserts into the suction tube 203, the air retained in the upper part of the negative pressure bottle 103 can be compressed, thereby providing volume clearance for the re-insertion of the piston 206 and preventing the piston 206 from directly and rigidly squeezing the liquid in the bottle, which would affect the reset. Furthermore, the reset force of the first spring 205 is greater than the downward force exerted by the water sample inside the negative pressure bottle 103 on the piston 206, thus ensuring that the piston 206 can reliably reset and remain sealed after sampling, preventing water sample from leaking out of the negative pressure bottle 103 through the suction tube 203. This design ensures that the piston 206 returns smoothly after sampling and improves the reliability of the sealed negative pressure bottle 103. This design also allows the suction tube 203 to be opened only during actual sampling and automatically return to a closed state when not sampling, thereby improving the sealing and stability of the negative pressure bottle 103 during replacement, transportation, and continuous sampling, and helping to reduce the risks of sample leakage, external contamination, and negative pressure failure.

[0050] In one alternative embodiment, the side and bottom walls of the basket 101 are provided with multiple holes to allow communication between the interior of the basket 101 and the external water body. When the basket 101 carrying the negative pressure bottle 103 is lowered to the sampling position, the basket 101 can be immersed in water along with the negative pressure bottle 103, allowing the external water body to flow freely through the holes, thereby avoiding significant water stagnation inside the basket 101. After sampling is completed and the basket 101 is lifted and retrieved, any remaining external liquid inside the basket 101 can be discharged promptly through the holes, reducing unnecessary additional liquid weight, alleviating the traction burden during the ascent of the basket 101, and preventing excess liquid from accumulating inside the basket 101.

[0051] In one alternative embodiment, a second cylinder 209 is provided at the top of the suspended basket 101. The second cylinder 209 is fixedly installed at the mounting position at the top of the suspended basket 101. The output shaft of the second cylinder 209 extends vertically and into the interior of the suspended basket 101. The lower end of the output shaft is connected to a pressure plate 210. The pressure plate 210 is located above the negative pressure bottle 103 and is correspondingly positioned to the top of the negative pressure bottle 103. When the bottle changing mechanism 105 sends the negative pressure bottle 103 into the suspended basket 101 and it reaches a predetermined position, the output shaft of the second cylinder 209 extends downward, driving the pressure plate 210 to move downward, so that the pressure plate 210 presses against the top of the negative pressure bottle 103, thereby pressing the negative pressure bottle 103 tightly inside the suspended basket 101. The downward pressure of the pressure plate 210 can limit the upward movement, swaying and tilting of the negative pressure bottle 103 in the basket 101, so that the negative pressure bottle 103 can maintain a relatively stable position during the process of lowering for sampling, lifting for recovery and changing bottles.

[0052] Furthermore, the pressure plate 210, in conjunction with the inner wall of the basket 101, forms a top-down clamping and limiting mechanism for the negative pressure bottle 103, ensuring that the bottom connecting structure of the negative pressure bottle 103 remains stably in its corresponding position. This facilitates accurate alignment between the suction pipe 203 at the bottom of the negative pressure bottle 103 and the relevant structure at the bottom of the basket 101. Thus, during sampling, displacement of the negative pressure bottle 103 within the basket 101 prevents disruption of the suction passage's opening state; during lifting and replacement, it also prevents the negative pressure bottle 103 from shifting out of its predetermined position due to shaking, thereby improving the stability of the sampling process and the reliability of continuous bottle replacement.

[0053] When it is necessary to replace the negative pressure bottle 103, the output shaft of the second cylinder 209 retracts upward, causing the pressure plate 210 to move upward and release the clamping effect on the negative pressure bottle 103. This allows the sampled negative pressure bottle 103 to be removed from the basket 101 and provides space for the next negative pressure bottle 103 to enter the basket 101. Through the above settings, the second cylinder 209 and the pressure plate 210 can reliably fix the negative pressure bottle 103 during the sampling stage and quickly release the negative pressure bottle 103 during the bottle replacement stage, thus taking into account both the stable positioning of the negative pressure bottle 103 and the need for continuous replacement.

[0054] In some alternative embodiments, a power supply assembly may also be provided on the suspended platform 101 to supply power to the electrical components mounted on the suspended platform 101. Specifically, the power supply assembly may be installed at a mounting position on the side, top, or bottom of the suspended platform 101 and electrically connected to the first cylinder 207 and the second cylinder 209 to provide electrical energy for the first cylinder 207 to drive the push plate 208 and the second cylinder 209 to drive the pressure plate 210. Preferably, the power supply assembly may be a storage battery or a dry cell battery pack; in embodiments where the overall weight control of the suspended platform 101 is critical, a dry cell battery pack or a lightweight battery box may be preferred to reduce the weight of the suspended platform 101 while meeting the power supply requirements, thereby reducing the traction load and improving the stability of the suspended platform 101 during lifting. Furthermore, the power supply assembly may be provided with a waterproof housing, which is fixedly connected to the suspended platform 101, and its wiring portion may adopt a sealed structure to reduce the impact of water vapor, splashing liquid, or short-term immersion in water on the power supply assembly and electrical connection portion during sampling. By directly mounting the power supply components on the suspended platform 101, the need for long-distance power supply cabling from the self-extensible sleeve 100 to the suspended platform 101 can be reduced, avoiding tangling, pulling, or interference caused by excessively long cabling during the lifting and lowering of the suspended platform 101. On the other hand, the suspended platform 101 can form a relatively independent power supply unit, which can stably drive the relevant actuators during lowering, sampling, lifting, and bottle changing, thereby improving the flexibility of the data acquisition system and the reliability of on-site operations.

[0055] In this embodiment, the displacement mechanism 104 includes a movable stage 300 sleeved on the outside of the telescopic sleeve 100. The movable stage 300 is used to support the bottle changing mechanism 105 and moves along the length direction of the telescopic sleeve 100. Multiple limiting grooves 301 are formed on the sidewalls of the telescopic sleeve 100, and each limiting groove 301 extends along the length direction of the telescopic sleeve 100. A transition slope 302 is formed between adjacent limiting grooves 301, which connects the limiting grooves 301 on adjacent telescopic sections, allowing the guide component to transition continuously between adjacent telescopic sections. By providing limiting grooves 301 on multiple telescopic sections and providing transition slopes 302 between adjacent limiting grooves 301, a continuous guide path can be provided for the movable stage 300 even when the telescopic sleeve 100 is in different extended states.

[0056] In this embodiment, brackets 303 are slidably connected to both sides of the movable platform 300. The brackets 303 can move relative to the movable platform 300 in a direction close to or away from the side wall of the telescopic sleeve 100. A roller 304 is rotatably connected to the bracket 303, and the roller 304 is embedded in the limiting groove 301. A second spring 305 is provided between the bracket 303 and the movable platform 300. The second spring 305 is preferably a tension spring, and its two ends are respectively connected to the bracket 303 and the movable platform 300. It is used to apply an elastic tension force towards the telescopic sleeve 100 to the bracket 303, so that the roller 304 always tends to be embedded in the limiting groove 301 and pressed against the groove wall. At the same time, after the roller 304 is embedded in the limiting groove 301, it can still make slight positional movements within the groove width range of the limiting groove 301, so as to achieve adaptive adjustment when passing through the transition slope 302, the connection part of adjacent telescopic joints, or when there are assembly errors. With the above settings, the roller 304 can be stably embedded in the limiting groove 301 to form a guide limit, and can also avoid rigid jamming with the limiting groove 301 by slight position adjustment, thereby improving the smoothness of the roller 304 when crossing the transition area and preventing the moving table 300 from getting stuck, dislodging, jumping or failing to guide during the movement.

[0057] In this embodiment, a second motor 306 is also provided on the support 303. The output shaft of the second motor 306 is connected to the roller 304 for driving the roller 304 to rotate. When the second motor 306 is started, it drives the roller 304 to roll along the limiting groove 301, thereby driving the support 303 and the moving platform 300 to move along the length of the telescopic sleeve 100, and further driving the bottle changing mechanism 105 to switch between the position near the shore and the docking position near the basket 101. When the roller 304 moves to the connection area between two adjacent limiting grooves 301, the roller 304 rolls along the transition slope 302 and remains in contact with the transition slope 302 under the elastic action of the second spring 305, so that the roller 304 can smoothly transition from the limiting groove 301 on one telescopic joint to the limiting groove 301 on the adjacent telescopic joint. In this way, even if the telescopic sleeve 100 is formed by multiple telescopic joints, the moving platform 300 can still move continuously across the connection part between adjacent telescopic joints.

[0058] With the above settings, on the one hand, the cooperation between the limiting groove 301 and the roller 304 can limit the movement trajectory of the moving platform 300, reduce the swaying and shaking of the moving platform 300 during the movement, and improve the stability of the bottle changing mechanism 105 during movement; on the other hand, the transition ramp 302, in conjunction with the second spring 305, enables the roller 304 to smoothly cross the structural change position between adjacent expansion joints, avoiding jamming at the junction of expansion joints, thereby ensuring that the bottle changing mechanism 105 can move smoothly in the entire expansion direction, and improving the continuity and reliability of the negative pressure bottle 103 replacement process.

[0059] In this embodiment, the outer wall of the roller 304 is covered with a rubber layer, which is fixedly disposed on the outer periphery of the roller 304. By providing a rubber layer on the outer wall of the roller 304, the friction between the roller 304 and the inner wall of the limiting groove 301 can be increased, giving the roller 304 better fit and traction during rolling drive, thereby improving the transmission stability of the moving platform 300 when moving along the telescopic sleeve 100. At the same time, the rubber layer can also play a certain buffering role when the roller 304 passes through the transition slope 302 and the junction of adjacent telescopic joints, reducing the impact generated by hard contact and reducing the possibility of slippage and jumping, thereby further improving the smoothness of the movement process of the bottle changing mechanism 105 and the reliability of the replacement process of the negative pressure bottle 103.

[0060] In this embodiment, the bottle changing mechanism 105 includes a connecting frame 400 connected to the bottom of the moving platform 300. The connecting frame 400 is used to mount the bottle changing mechanism 105 as a whole under the moving platform 300 and move synchronously with the moving platform 300 along the telescopic sleeve 100. A switching frame 401 is rotatably connected to the bottom of the connecting frame 400. The switching frame 401 can rotate relative to the connecting frame 400 to adjust the orientation position of each negative pressure bottle 103 on the switching frame 401, so that the target negative pressure bottle 103 to be replaced can be switched to the working position corresponding to the basket 101. Preferably, the switching frame 401 can rotate about a vertical axis so as to realize the sequential switching of multiple negative pressure bottle 103 working positions within a limited installation space.

[0061] The switching frame 401 is provided with a clearance opening 402, which extends through the switching frame 401 and is used to reserve clearance space for the suction tube 203 at the bottom of the negative pressure bottle 103, so as to avoid interference between the suction tube 203 and the switching frame 401.

[0062] In this embodiment, the switching frame 401 is equipped with multiple third cylinders 403, each corresponding to a different negative pressure bottle 103 station. Each third cylinder 403 has a pusher 404 connected to its telescopic shaft, allowing it to reciprocate in a predetermined direction under the drive of the third cylinder 403. The pusher 404 is equipped with a clamp 405, which consists of multiple elastic strips forming an elastic holding portion to clamp and limit the negative pressure bottle 103. The negative pressure bottle 103 is inverted and clamped onto the clamp 405, so that the bottle body is elastically held by the multiple elastic strips. The suction tube 203 on the negative pressure bottle 103 is positioned downwards and located within the clearance opening 402. By inverting the negative pressure bottle 103, the suction tube 203 naturally faces downwards, facilitating its subsequent engagement with the corresponding structure at the bottom of the basket 101. This also reduces the likelihood of interference between the suction tube 203 and the switching frame 401, thereby improving the stability of the negative pressure bottle 103 during storage and switching. By configuring the clamp 405 as an elastic clamping structure composed of multiple elastic strips, it reliably clamps the negative pressure bottle 103 during pushing, preventing it from shaking or falling off. Furthermore, it automatically disengages during subsequent return to its original position through elastic deformation, reducing the need for additional release structures and simplifying the overall switching process.

[0063] Before the initial sampling, the basket 101 is empty, and the traction rope 102 is suspended at a fixed length. First, the lifting mechanism 106 raises the basket 101 to the predetermined docking position. Then, the displacement mechanism 104 moves the bottle-changing mechanism 105, docking one of the workstations storing the negative pressure bottle 103 with the basket 101. By using the lifting mechanism 106 to lift the basket 101 at its end while it is suspended, the basket 101 can be raised to a fixed height suitable for bottle changing without changing the overall suspension length of the traction rope 102. This provides a relatively stable receiving position for the subsequent loading of the negative pressure bottle 103 and reduces the swaying effect caused by direct docking while suspended. The third cylinder 403 of the corresponding workstation is activated, and its telescopic shaft drives the pusher 404 and the clamp 405 to move towards the basket 101, allowing the negative pressure bottle 103 held by the clamp 405 to enter the basket 101. After the negative pressure bottle 103 reaches the predetermined position, the second cylinder 209 drives the pressure plate 210 to move downward, pressing and positioning the negative pressure bottle 103 to prevent it from moving upward, swaying, or tilting within the basket 101, ensuring stable positioning during subsequent sampling. Since the clamp 405 consists of multiple elastic strips, after the negative pressure bottle 103 is fixed by the pressure plate 210, when the third cylinder 403 returns to its original position, the multiple elastic strips undergo elastic deformation and disengage from the negative pressure bottle 103, thus leaving the negative pressure bottle 103 within the basket 101. This method allows for the handover of the negative pressure bottle 103 without the need for an additional complex clamping mechanism, improving the smoothness and reliability of the bottling process. After bottling is complete, the displacement mechanism 104 drives the bottle-changing mechanism 105 to move away from the suspended end, reducing the load on the distal end of the telescopic sleeve 100 and improving the overall center of gravity distribution, thereby reducing the operator's hand burden and improving operational stability during the sampling phase.

[0064] After one sampling is completed, the lifting mechanism 106 is activated to raise the suspended basket 101 to the predetermined docking position. By using the lifting mechanism 106 to lift the end area of ​​the traction rope 102, the end lifting can be completed while the basket 101 remains in a natural suspension state. This allows the basket 101 to maintain a certain degree of self-adjustment capability as it approaches the docking area, improving the consistency of subsequent docking positions. Subsequently, the displacement mechanism 104 moves the bottle-changing mechanism 105, docking the previously vacated recycling station with the basket 101. The third cylinder 403 at the corresponding station activates, causing the clamp 405 to move into the basket 101 and elastically clamp the sampled negative pressure bottle 103. Then, the second cylinder 209 retracts, causing the pressure plate 210 to release the negative pressure bottle 103. The third cylinder 403 then drives the pusher 404 back to its original position, thus bringing the sampled negative pressure bottle 103 back to the recycling station. By first clamping, then releasing the pressure plate 210, and then returning to its original position for recycling, the sampled negative pressure bottle 103 can be kept under control throughout the entire handover process, preventing it from falling or shifting after the clamping is released, thus improving the stability of the recycling process. Next, the switching frame 401 rotates one station, causing another negative pressure bottle 103 to rotate to the position corresponding to the basket 101. By rotating the switching frame 401 station by station, multiple negative pressure bottles 103 can be sequentially rotated to the working position within a limited space, without having to move all of the negative pressure bottles 103 as a whole, thereby reducing the switching stroke and improving the efficiency of continuous bottle changing. The third cylinder 403 at the corresponding station pushes the pusher 404 and the clamp 405 forward again, sending the new negative pressure bottle 103 into the basket 101; the second cylinder 209 drives the pressure plate 210 to move down to complete the positioning, and then the third cylinder 403 returns to its original position, and the clamp 405 disengages from the negative pressure bottle 103. This completes one cycle of old bottle recycling and new bottle replenishment, preparing for the next sampling. Through this cyclical process, the sampled negative pressure bottle 103 and the ready-to-use negative pressure bottle 103 can be orderly alternated, reducing manual disassembly and assembly of each bottle, thereby improving the efficiency and stability of continuous on-site sampling.

[0065] In this embodiment, a third motor 406 is provided on the connecting frame 400. The third motor 406 is fixedly installed at the mounting position of the connecting frame 400, and the output shaft of the third motor 406 is connected to the switching frame 401 for driving the switching frame 401 to rotate relative to the connecting frame 400. Preferably, the output shaft of the third motor 406 can be coaxially connected to the rotation shaft of the switching frame 401 to make the transmission path shorter and the structure more compact; it can also be connected to the switching frame 401 through a gear transmission component, a synchronous belt transmission component, or a reduction transmission component to meet the needs of torque and speed control of the switching frame 401. By setting the third motor 406, the rotation process of the switching frame 401 can be actively controlled, so that the multiple negative pressure bottle 103 stations on the switching frame 401 are switched sequentially to the working positions corresponding to the basket 101 in a predetermined order, thereby providing a stable rotational foundation for the sequential replenishment and recovery of the negative pressure bottle 103.

[0066] During the initial bottling or subsequent bottle changing process, when it is necessary to switch between different negative pressure bottle 103 stations, the third motor 406 starts and drives the switching frame 401 to rotate, so that the target station rotates to a position opposite to the basket 101. After the target station is rotated into place, the third motor 406 stops outputting and keeps the switching frame 401 at the current angle, so that the third cylinder 403 of the corresponding station can push the pusher 404 and the clamp 405 to move, sending the target negative pressure bottle 103 into the basket 101, or bringing the sampled negative pressure bottle 103 back to the corresponding station. By driving the switching frame 401 to rotate station by station through the third motor 406, multiple negative pressure bottles 103 can be rotated in an orderly manner in a limited space, avoiding the need to move all negative pressure bottles 103 as a whole to complete the switching, thereby reducing the switching stroke, improving bottle changing efficiency, and helping to improve the stability and positioning accuracy of the switching frame 401 during rotation.

[0067] In some alternative embodiments, the third motor 406 may be a geared motor to increase the output torque of the switching frame 401 during rotation and reduce the rotation speed, thereby reducing the swaying of the switching frame 401 due to inertia during rotation and improving the stability of the negative pressure bottle 103 station switching. Furthermore, the third motor 406 may also be used in conjunction with limiting or positioning components to ensure that the switching frame 401 can remain stably at each station, thereby improving the docking accuracy between the negative pressure bottle 103 and the basket 101.

[0068] In this embodiment, a docking recess 500 is provided on one side of the connecting frame 400. The docking recess 500 is oriented towards the docking direction of the basket 101, providing lateral accommodation and alignment space for the basket 101 after it is lifted to a predetermined position. An electromagnet 501 is installed inside the docking recess 500 and is fixedly mounted on the inner side wall of the docking recess 500. An iron bar 502 is provided on one side of the basket 101. The iron bar 502 is fixedly connected to the outer side wall of the basket 101 and is positioned corresponding to the electromagnet 501. When the basket 101 is lifted to a docking position close to the bottle changing mechanism 105, the iron bar 502 on the side of the basket 101 enters the corresponding area of ​​the docking recess 500. At this time, the electromagnet 501 is energized, attracting the iron bar 502, thereby attracting and holding the basket 101 at the docking recess 500.

[0069] By setting the docking notch 500, a lateral limit can be formed on the basket 101 when it approaches the docking area, making the approach path of the basket 101 clearer. By setting the electromagnet 501 in cooperation with the iron bar 502, the basket 101 can be quickly attracted and positioned after it reaches the docking position, reducing the left and right swaying, forward and backward swaying and attitude deflection of the basket 101 caused by the suspension of the traction rope 102. In this way, the basket 101 can maintain a relatively stable position when docking with the bottle changing mechanism 105, thereby improving the positional accuracy of the negative pressure bottle 103 during loading and recycling, reducing docking deviation, and improving the stability and reliability of the continuous bottle changing process.

[0070] After the negative pressure bottle 103 is loaded or retrieved, the electromagnet 501 is de-energized, releasing its attraction to the iron bar 502 and allowing the basket 101 to return to a movable state for subsequent lowering for sampling or retrieval. This structure enables rapid positioning when docking is required and convenient release after docking, thus balancing the stability of the basket 101 during docking with the flexibility of subsequent operations.

[0071] In this embodiment, a fourth cylinder 503 is provided at the bottom of the switching frame 401. The fourth cylinder 503 is fixedly installed at the bottom mounting position of the switching frame 401. The output shaft of the fourth cylinder 503 extends in the vertical direction, and a positioning top contact frame 504 is connected to the output shaft. The positioning top contact frame 504 is used to further correct the top contact of the basket 101 after it is attracted to the docking area. Specifically, the positioning top contact frame 504 includes a circular frame and a plurality of L-shaped rods connected to the circular frame. The plurality of L-shaped rods are distributed circumferentially along the circular frame, and the lower end of each L-shaped rod forms a top contact portion for contacting the basket 101.

[0072] After the suspended platform 101 is lifted by the lifting mechanism 106 to a docking position close to the connecting frame 400, the electromagnet 501 is energized to attract the iron bar 502, bringing the suspended platform 101 close to and holding it at the docking notch 500. Since the suspended platform 101 is a suspended structure, even under magnetic attraction, its specific position may still have some deviation. Therefore, relying solely on the electromagnet 501 for attraction is insufficient to guarantee a stable and precise docking state between the suspended platform 101 and the switching frame 401. At this time, the fourth cylinder 503 actuates, its output shaft driving the alignment top contact frame 504 to move downwards or upwards relative to each other, causing the top contacts of multiple L-shaped rods to contact the corresponding parts of the suspended platform 101 and apply a pushing action to the suspended platform 101, thereby aligning it to the predetermined position. By using the L-shaped rods to push against the suspended platform 101, the positional error of the suspended platform 101 can be further eliminated based on the initial magnetic positioning, making the suspended platform 101 closer to the predetermined docking position in both height and lateral direction. This improves the relative positional accuracy between the basket 101 and the switching frame 401, making the subsequent feeding, clamping, retrieval, and reloading of the negative pressure bottle 103 smoother, reducing the risk of jamming, collision, or assembly failure caused by misalignment, and improving the stability and reliability of the continuous bottle changing process.

[0073] In this embodiment, the lifting mechanism 106 includes a rotating lifting frame 600 rotatably connected to the telescopic sleeve 100. The rotating lifting frame 600 is located at the end of the telescopic sleeve 100 away from the shore and can rotate relative to the telescopic sleeve 100 around a predetermined axis. A fourth motor 601 is provided on the telescopic sleeve 100 and is fixedly installed at the mounting position of the telescopic sleeve 100. The output shaft of the fourth motor 601 is drively connected to the rotating shaft of the rotating lifting frame 600 to drive the rotating lifting frame 600 to rotate. Preferably, the output shaft of the fourth motor 601 can be directly connected to the rotating shaft, or it can be connected to the rotating shaft through a gear transmission component or a reduction transmission component to meet the torque requirements when the rotating lifting frame 600 rotates. By setting the fourth motor 601 to drive the rotating lifting frame 600 to rotate, the lifting process of the basket 101 can be actively controlled, improving the stability and repeatability of the lifting action.

[0074] In this embodiment, when the rotating lifting frame 600 rotates, its free end can rotate to abut against the lower section of the traction rope 102, preferably against the section of the traction rope 102 closest to the basket 101. Thus, after the fourth motor 601 drives the rotating lifting frame 600 to rotate, the rotating lifting frame 600, by supporting the lower section of the traction rope 102, shortens the effective suspension length of the traction rope 102, thereby causing the basket 101 to move upwards as a whole. Since the rotating lifting frame 600 does not directly clamp the basket 101, but rather lifts it by acting on the traction rope 102, the basket 101 remains in a naturally suspended state by the traction rope 102 during the lifting process. This approach avoids structural interference caused by the rigid jacking basket 101 body and allows the basket 101 to retain certain adaptive suspension characteristics when it is lifted to the docking area. This facilitates fine position adjustments when the basket 101 is subsequently engaged with the connecting frame 400, electromagnet 501, or alignment top contact frame 504, thereby improving the smoothness and stability of the basket 101 when docking with the bottle changing mechanism 105.

[0075] Furthermore, when bottle replacement is required, the first motor 201 drives the reel 200 to wind up the traction rope 102, raising the basket 101 to a predetermined height near the far end of the telescopic sleeve 100. Then, the fourth motor 601 drives the rotating lifting frame 600 to continue rotating, supporting the lower section of the traction rope 102 and further raising the basket 101 to the bottle replacement docking position. By coordinating the lifting of the reel 200 with the lifting of the end of the rotating lifting frame 600, the reel 200 can complete the large-stroke recovery, and the rotating lifting frame 600 can complete the end lifting and docking height adjustment, thereby reducing the swaying of the basket 101 during the large-stroke recovery process and improving the consistency of the final docking position. After bottle replacement is completed, the fourth motor 601 reverses the rotation of the rotating lifting frame 600 to reset, disengaging it from the traction rope 102, thus not affecting the subsequent lowering of the basket 101 for sampling.

[0076] In another optional embodiment, the traction rope 102 includes two connected parts: a fixed suspension section connected to the basket 101, and a winding / unwinding adjustment section connected to the fixed suspension section. The winding / unwinding adjustment section is wound around the outer circumference of the reel 200, and the reel 200 is driven by the first motor 201 to wind or unwind the winding / unwinding adjustment section to adjust the overall suspension height of the basket 101; the fixed suspension section is used to form a relatively stable suspension connection with the basket 101, so that the basket 101 remains in a natural suspension state during the bottle changing docking stage. By dividing the traction rope 102 into a fixed suspension section and a winding / unwinding adjustment section, the reel 200 can be adapted to different sampling water levels, bank heights, or different deployment conditions for height pre-adjustment, without directly replacing the end docking lifting function during the bottle changing process.

[0077] Furthermore, in this embodiment, the retraction and extension of the retraction and extension adjustment section of the reel 200 is mainly used for large-scale height adjustment of the basket 101. During bottle changing operations, the lifting mechanism 106 still lifts the end portion of the suspended section near the basket 101. This is because if the basket 101 is directly lifted to the docking position of the bottle changing mechanism 105 using only the reel 200, the basket 101 is prone to swaying in the docking area due to overall tension, which is detrimental to preserving the natural suspension buffer required for docking. However, by partially lifting the end portion using the lifting mechanism 106, precise docking can be completed while maintaining the basket 101 in a natural suspension state, thereby improving positional adaptability and docking stability during bottle changing. Thus, the reel 200 and the lifting mechanism 106 respectively undertake the functions of height pre-adjustment and end docking lifting, with a clear division of labor, which is beneficial for balancing sampling height adjustment capability and bottle changing docking reliability.

[0078] This embodiment also provides a method for collecting sterile water samples for water pollution detection, using the aforementioned sterile water sample collection system for water pollution detection. The sterile water sample collection specifically includes the following steps: Step 1: Adjust the extension length of the telescopic sleeve and support it with an auxiliary support frame to ensure that the collection system extends stably toward the sampling water area; Step 2: When the suspended platform is in an empty state, control the lifting mechanism to lift the suspended platform to the predetermined docking position; Step 3: Control the displacement mechanism to move the bottle changing mechanism so that the negative pressure bottle is connected to the basket and the empty negative pressure bottle is sent into the basket; Step 4: Control the pressure plate to move down and press and position the negative pressure bottle that has entered the basket; Step 5: Control the reel to unwind the traction rope, lower the basket to the target water level, and control the suction pipe to open so that the negative pressure bottle can collect water samples; Step Six: After sampling is completed, control the reel to wind up the traction rope and, in conjunction with the lifting mechanism, raise the basket to the bottle-changing docking position; Step 7: Control the bottle-changing mechanism to retrieve the sampled negative pressure bottle and send in a new negative pressure bottle, so that the basket can enter the next sampling cycle.

[0079] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A sterile water sample collection system for water pollution detection, characterized in that, include: Telescopic sleeve; A suspended basket is located at the end of the telescopic sleeve away from the shore, and a traction rope is connected to the telescopic sleeve. The suspended basket is configured to store a negative pressure bottle. A displacement mechanism is provided on the telescopic sleeve and can move along the length direction of the telescopic sleeve; A bottle-changing mechanism is provided on the displacement mechanism and can move with the displacement mechanism. The bottle-changing mechanism stores multiple negative pressure bottles and is configured to replace the negative pressure bottles on the basket that have completed sampling. A lifting mechanism is located at the end of the telescopic sleeve furthest from the shore, and is used to lift the basket so that the basket can approach and dock with the bottle changing mechanism. The displacement mechanism includes a movable platform sleeved on the outside of the telescopic sleeve; The telescopic sleeve has multiple limiting grooves on its sidewall, which are respectively opened on the sidewall of multiple telescopic joints, and a transition slope is formed between adjacent limiting grooves. The movable platform is slidably connected to two sides of the platform, and a roller is rotatably connected to the support. The roller is embedded in the limiting groove, and a second spring is provided between the support and the movable platform. The bracket is also equipped with a second motor, and the output shaft of the second motor is connected to the roller drive. The bottle-changing mechanism is configured to retrieve the negative pressure bottles that have been sampled on the basket and send new negative pressure bottles into the basket; The bottle changing mechanism includes a connecting frame connected to the bottom of the moving platform, and a switching frame is rotatably connected to the bottom of the connecting frame. The switching frame is provided with an avoidance opening. The switching frame is equipped with multiple third cylinders, and a pusher is connected to the telescopic shaft of the third cylinder. The pusher is equipped with a clamp, and the negative pressure bottle is inverted and clamped on the clamp. The suction tube on the negative pressure bottle is located inside the clearance opening.

2. The sterile water sample collection system for water pollution detection according to claim 1, characterized in that, A reel is rotatably connected to the telescopic sleeve, and the traction rope is wound on the reel. A first motor is provided on the telescopic sleeve, and the output shaft of the first motor is drivenly connected to the reel. There are at least two traction ropes.

3. The sterile water sample collection system for water pollution detection according to claim 1, characterized in that, The bottom of the basket has a connection opening, and the bottom of the negative pressure bottle is connected to a suction tube. A connecting sleeve is slidably fitted on the outside of the suction tube. A first spring connects the connecting sleeve and the suction tube. A piston is installed inside the connecting sleeve. The piston is movably located inside the suction tube and can block and open the water inlet of the suction tube. The bottom of the basket has a first cylinder, and a push plate is connected to the output shaft of the first cylinder. The push plate is located at the top of the connecting sleeve.

4. The sterile water sample collection system for water pollution detection according to claim 1, characterized in that, The top of the suspended basket is equipped with a second cylinder, the output shaft of which extends into the interior of the suspended basket and is connected to a pressure plate.

5. The sterile water sample collection system for water pollution detection according to claim 1, characterized in that, The clamp is composed of multiple elastic strips, which are arranged to form an elastic holding part to clamp and limit the negative pressure bottle.

6. The sterile water sample collection system for water pollution detection according to claim 1, characterized in that, The connecting frame is equipped with a third motor, and the output shaft of the third motor is connected to the switching frame in a transmission manner.

7. The sterile water sample collection system for water pollution detection according to claim 1, characterized in that, The lifting mechanism includes a rotating lifting frame rotatably connected to the telescopic sleeve, and a fourth motor is provided on the telescopic sleeve. The output shaft of the fourth motor is drively connected to the rotating shaft of the rotating lifting frame.

8. A method for collecting sterile water samples for water pollution detection, characterized in that, Water samples were collected using the sterile water sampling system for water pollution detection as described in any one of claims 1-7.

9. The method for collecting sterile water samples for water pollution detection according to claim 8, characterized in that, Includes the following steps: Adjust the extension length of the telescopic sleeve and support it with an auxiliary support frame to ensure that the data collection system extends stably toward the sampling water area; When the suspended platform is in an unoccupied state, control the lifting mechanism to lift the suspended platform to the predetermined docking position; The control displacement mechanism drives the bottle changing mechanism to move, so that the negative pressure bottle is connected to the basket and the negative pressure bottle is sent into the basket; The pressure plate is moved downward to press and position the negative pressure bottle that has entered the basket. Control the reel to unwind the traction rope, lower the basket to the target water level, and control the suction pipe to open so that the negative pressure bottle can collect water samples; After sampling is completed, the control reel winds up the traction rope and, in conjunction with the lifting mechanism, raises the basket to the bottle-changing docking position; The control bottle-changing mechanism retrieves the sampled negative pressure bottle and sends in a new negative pressure bottle, allowing the basket to enter the next sampling cycle.

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