Water quality sampler for environmental monitoring
By using a multi-layer pressure-controlled water inlet mechanism and a servo motor-driven sampling mechanism, the water quality sampler achieves simultaneous multi-depth sampling within the same time period, solving the time difference error problem of traditional samplers and providing accurate monitoring data for complex water environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING FULANG ENVIRONMENTAL TECHNOLOGY CO LTD
- Filing Date
- 2026-04-10
- Publication Date
- 2026-06-12
Smart Images
Figure CN121994539B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water quality sampling, and more specifically, to a water quality sampler for environmental monitoring. Background Technology
[0002] Existing water samplers have certain drawbacks in terms of sampling strategies and technical implementation. The main problem is that they cannot collect water samples from different depths within the same time period or from the same depth at different time periods. Traditional sampling equipment generally adopts a single-point sequential sampling mode, which can only obtain water samples layer by layer through multiple lifting and lowering operations. Due to the time-varying characteristics of the physicochemical properties of water, key indicators such as the concentration of various pollutants, dissolved oxygen, pH value, and temperature are all dynamically changing. When the sampler operates layer by layer in a sequential mode, the sampling time difference between different depths can be several minutes or even longer. This time difference means that the collected water samples actually represent the conditions at different depths at different times, rather than the true vertical distribution at the same time. It cannot accurately reflect the stratification pattern of pollutants. Especially in dynamic environments such as rapid diffusion of pollutants, tidal changes, and thermocline fluctuations, the sampling introduced by the time difference has a large error.
[0003] As a complex and dynamic ecosystem, the water environment is affected by a combination of factors, including intermittent discharges from pollution sources, biological diurnal rhythms, cyclical climate fluctuations, and seasonal hydrological changes. This results in significant temporal variations in pollutant concentrations and distribution. Accurate water quality assessment requires continuous sampling at the same location at different times to obtain concentration-time curves and analyze migration and transformation patterns. However, existing samplers are limited by the number of containers and operating modes, allowing only a limited number of water samples to be obtained in a single operation. They cannot achieve long-term continuous or high-frequency sampling. Even with repeated operations, there are problems such as poor location reproducibility, high cost, and significant interference. This deficiency means that monitoring work can only rely on discrete sampling points to assess water quality, making it impossible to capture the complete process of pollution events. The monitoring of important environmental events such as sudden pollution, intermittent discharges, and short-term concentration peaks is clearly insufficient. Summary of the Invention
[0004] (a) Technical problems to be solved
[0005] In view of the problems existing in the prior art, the present invention provides an environmental monitoring water quality sampler to solve the technical problems mentioned in the background art.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, the present invention provides the following technical solution:
[0008] An environmental monitoring water quality sampler includes a servo motor with a connecting cylinder detachably connected to its lower end face; it also includes a pressure-controlled water inlet mechanism, comprising three sets of equidistantly arranged vertically, including a mounting frame with four sets of water storage boxes inside, each containing multiple sets of extrusion strips; two sets of fixing rings coaxially arranged on the mounting frame, the sidewalls of which are fixedly connected to the sidewalls of the water storage boxes, and the uppermost fixing ring being fixedly connected to the inner sidewall of the connecting cylinder; and a sampling mechanism, comprising three sets corresponding to the pressure-controlled water inlet mechanism, including a sampling disc rotatably connected within the mounting frame, the outer surface of which abuts against the water storage boxes and the lower end faces of the extrusion strips.
[0009] Preferably, the upper end face of the mounting bracket is provided with multiple sets of insert rods, and the lower end face of the mounting bracket is provided with multiple sets of fixing sleeves adapted to the insert rods. The three sets of mounting brackets are connected vertically through the insert rods and fixing sleeves.
[0010] Preferably, the upper water storage box is threaded with a threaded ring, and the threaded ring is provided with two sets of water inlet pipes, while the lower water storage box is threaded with a threaded sleeve.
[0011] Preferably, the water inlet pipe has two sets of water inlets on the upper side and two sets of water outlets on the lower side, and the water outlets are connected to the water storage box.
[0012] Preferably, the water inlet pipe is provided with an intermediate ring, and a limiting rod is provided at the center of the intermediate ring. Two sets of blocks are symmetrically slidably connected to the intermediate ring in the water inlet pipe. A push spring is provided between the block and the intermediate ring. One end of the push spring is fixedly connected to the side wall of the intermediate ring, and the other end is fixedly connected to the side wall of the block.
[0013] Preferably, threaded rods are rotatably connected to both ends of the water inlet pipe, and tension springs are threaded onto the threaded rods. The other end of the tension springs is fixedly connected to the other side wall of the stop block.
[0014] Preferably, a rotating cylinder is connected to the center of the sampling disk, the rotating cylinder is located inside the fixed ring and is rotatably connected to the fixed ring, the uppermost rotating cylinder is fixedly connected to the output end of the servo motor, the upper and lower sets of rotating cylinders are fixedly connected, and the sampling disk is provided with multiple sets of sampling slots.
[0015] Preferably, the sampling tray is provided with multiple sets of connecting tubes, and the connecting tubes are provided with multiple sets of flow holes.
[0016] Preferably, the connecting pipe has two sets of sliding sleeves, one upper and one lower, connected by a sliding rod. The two sets of sliding sleeves are slidably connected to the sliding rod. A compression spring is sleeved on the outer surface of the sliding rod, and the two ends of the compression spring are fixedly connected to the side walls of the two sets of sliding sleeves respectively.
[0017] Preferably, the side wall of the sliding sleeve is connected to a compression ball, the compression ball is slidably connected to the sampling disk, a limiting ring is sleeved on the outer surface of the sliding sleeve, the limiting ring abuts against the inner side wall of the connecting pipe, the limiting ring is slidably connected to the inner side wall of the connecting pipe, and a limiting groove is formed on the limiting ring.
[0018] (III) Beneficial Effects
[0019] Compared with existing technologies, this invention provides an environmental monitoring water quality sampler with the following advantages: This environmental monitoring water quality sampler, through a multi-layer pressure-controlled water inlet mechanism design, achieves synchronous collection of water samples from different depths within the same time period. The device adopts a design scheme with three sets of pressure-controlled water inlet mechanisms arranged equidistantly, each set equipped with an independent pressure control system. By adjusting the combination of threaded rods and tension springs, specific water pressure thresholds can be set for different depth layers, ensuring that each sampling mechanism only initiates the water inlet program within a preset depth range. Utilizing the physical characteristic that water pressure increases linearly with depth, the connection state between the inlet and outlet is controlled by the sliding displacement of a baffle within the inlet pipe. When the water pressure reaches the preset value, the baffle moves to open the flow channel; when the water pressure deviates from the set range, it automatically closes, achieving depth-selective sampling.
[0020] The synchronous and coordinated operation of the three-layer sampling mechanism enables the equipment to acquire water samples from different depths in a single underwater operation. These water samples are collected at the same time point, eliminating the time difference errors caused by traditional time-segmented sampling. This provides a certain data foundation for analyzing the vertical stratification structure of water bodies and the distribution patterns of pollutants. In particular, when studying complex aquatic environmental phenomena such as thermoclines, density strata, and pollutant diffusion boundaries, synchronous multi-depth sampling can capture the instantaneous water quality distribution state, avoid measurement deviations caused by dynamic changes in water bodies, and achieve locational sampling of specific water layers, meeting the sampling depth requirements of different environmental monitoring projects.
[0021] This water sampler solves the problem of collecting water samples at the same depth at different times through a servo motor-driven rotary sampling mechanism, improving the monitoring capability of dynamic water quality changes. Multiple sampling slots set in the sampling tray, together with connecting pipes and sliding sleeve components, form a time-series controlled sampling system. When the sampling tray rotates slowly under the drive of the motor, different sampling slots pass through the water inlet position below the water storage box in sequence. Through the mechanical linkage mechanism of the squeezing ball and the sliding sleeve, the water inlet time of each sampling slot is controlled. The speed regulation function of the servo motor allows the water inlet duration of each sampling slot to be flexibly set according to monitoring needs, thereby obtaining water samples at different time periods.
[0022] This time-series sampling mechanism achieves discrete sampling through the continuity of mechanical motion. The capacity design of the sampling tank and the control of the inlet flow rate ensure that the water samples collected in each time period are representative and comparable. The cooperative design of the limiting ring and the limiting tank realizes the start and stop control of the water inlet process. By adjusting the speed of the servo motor, the sampling time interval can be flexibly controlled. It can perform high-frequency short-time sampling to capture rapid changes, or long-time interval sampling to observe slow changing trends, meeting the needs of different types of environmental monitoring projects. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of an environmental monitoring water quality sampler according to the present invention;
[0024] Figure 2 In this invention Figure 1 A schematic diagram of the cross-sectional structure;
[0025] Figure 3 This is a schematic diagram of the mounting frame and sampling tray in this invention;
[0026] Figure 4 In this invention Figure 3 A schematic diagram of the cross-sectional structure;
[0027] Figure 5 This is a schematic diagram of the mounting bracket and water storage box in this invention;
[0028] Figure 6 In this invention Figure 5 A schematic diagram of the cross-sectional structure;
[0029] Figure 7 This is a cross-sectional view of the water inlet pipe and the threaded ring in this invention.
[0030] Figure 8 This is a schematic diagram of the sampling disk and extrusion ball in this invention;
[0031] Figure 9 In this invention Figure 8 A schematic diagram of the cross-sectional structure;
[0032] Figure 10 This is a cross-sectional view of the sampling disk and rotating cylinder in this invention.
[0033] Figure 11 This is a cross-sectional view of the connecting pipe in this invention;
[0034] Figure 12 This is a schematic diagram of the structure of the sliding sleeve and sliding rod in this invention.
[0035] In the diagram: 11. Servo motor; 12. Connecting cylinder; 21. Mounting bracket; 22. Water storage box; 23. Extrusion strip; 24. Fixing ring; 25. Insert rod; 26. Fixing sleeve; 27. Threaded ring; 28. Water inlet pipe; 29. Threaded sleeve; 31. Sampling plate; 32. Rotating cylinder; 33. Sampling groove; 34. Connecting pipe; 35. Flow hole; 36. Sliding sleeve; 37. Sliding rod; 38. Compression spring; 39. Extrusion ball; 210. Water inlet; 211. Water outlet; 212. Intermediate ring; 213. Limiting rod; 214. Stop block; 215. Push spring; 216. Threaded rod; 217. Tension spring; 310. Limiting ring; 311. Limiting groove. Detailed Implementation
[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0037] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0038] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.
[0039] Please see Figures 1-12An environmental monitoring water quality sampler includes a servo motor 11, with a connecting cylinder 12 detachably connected to the lower end face of the servo motor 11; it also includes a pressure-controlled water inlet mechanism, with three sets of pressure-controlled water inlet mechanisms arranged equidistantly vertically, including a mounting frame 21, with four sets of upper and lower water storage boxes 22 inside the mounting frame 21, and multiple sets of extrusion strips 23 inside the water storage boxes 22. Two sets of fixing rings 24 are coaxially arranged on the mounting frame 21, with the sidewalls of the fixing rings 24 fixedly connected to the sidewalls of the water storage boxes 22. The uppermost fixing ring 24 is fixedly connected to the inner sidewall of the connecting cylinder 12. Multiple sets of insertion rods 25 are provided on the upper end face of the mounting frame 21, and multiple sets of fixing sleeves 26 adapted to the insertion rods 25 are provided on the lower end face of the mounting frame 21. The three sets of mounting frames 21 are connected vertically via the insertion rods 25 and fixing sleeves 26. A threaded ring 27 is threadedly connected to the upper water storage box 22. Two sets of water inlet pipes 28 are provided on the ring 27. A threaded sleeve 29 is threadedly connected to the lower water storage box 22. Two sets of water inlets 210 are opened on the upper side of the water inlet pipe 28 and two sets of water outlets 211 are opened on the lower side. The water outlets 211 are connected to the water storage box 22. An intermediate ring 212 is provided inside the water inlet pipe 28. A limiting rod 213 is provided at the center of the intermediate ring 212. Two sets of stop blocks 214 are symmetrically slidably connected to the intermediate ring 212 inside the water inlet pipe 28. A push spring 215 is provided between the stop block 214 and the intermediate ring 212. One end of the push spring 215 is fixedly connected to the side wall of the intermediate ring 212, and the other end is fixedly connected to the side wall of the stop block 214. Threaded rods 216 are rotatably connected to both ends of the water inlet pipe 28. A tension spring 217 is threadedly connected to the threaded rod 216. The other end of the tension spring 217 is fixedly connected to the other side wall of the stop block 214.
[0040] It also includes a sampling mechanism, which has three sets corresponding to the pressure-controlled water inlet mechanism. These include a sampling disc 31, rotatably connected to the mounting frame 21, with its outer surface abutting against the lower end face of the water storage box 22 and the extrusion strip 23. A rotating cylinder 32 is connected to the center of the sampling disc 31, rotatably connected to the fixed ring 24. The uppermost rotating cylinder 32 is fixedly connected to the output end of the servo motor 11. The three sets of rotating cylinders 32 are fixedly connected. The sampling disc 31 contains multiple sampling slots 33 and multiple connecting pipes 34, each with multiple openings. The connecting pipe 34 has two sets of sliding sleeves 36 connected to each other through the flow hole 35. The two sets of sliding sleeves 36 are connected by a sliding rod 37. The two sets of sliding sleeves 36 are slidably connected to the sliding rod 37. A compression spring 38 is sleeved on the outer surface of the sliding rod 37. The two ends of the compression spring 38 are fixedly connected to the side walls of the two sets of sliding sleeves 36 respectively. A squeezing ball 39 is connected to the side wall of the sliding sleeve 36. The squeezing ball 39 is slidably connected to the sampling plate 31. A limiting ring 310 is sleeved on the outer surface of the sliding sleeve 36. The limiting ring 310 abuts against the inner side wall of the connecting pipe 34. The limiting ring 310 is slidably connected to the inner side wall of the connecting pipe 34. A limiting groove 311 is formed on the limiting ring 310.
[0041] The entire device is installed on a ship. When sampling is required, the device is lowered into the water. The three-layer sampling mechanism can achieve sampling at different depths at the same time. The multiple sampling slots 33 in the sampling plate 31 can achieve sampling at the same depth at different time periods. The three sets of mounting brackets 21 are fixedly connected by the insertion rod 25 and the fixing sleeve 26. The three sets of sampling plates 31 are fixedly connected by the rotating cylinder 32. The three sets of sampling plates 31 rotate with the rotation of the output end of the servo motor 11. The three sets of mounting brackets 21 are stationary. The detachable connection of the connecting cylinder 12 allows the device to be lowered to different depths for sampling. The servo motor 11 can control the rotation speed of the sampling plate 31, thereby controlling the time for each sampling slot 33 to collect water samples.
[0042] To ensure that the three sampling discs 31 sample only at their corresponding depths, the threaded rod 216 needs to be adjusted. The push spring 215 exerts a pushing force on the stop block 214, and the tension spring 217 exerts a pulling force on the stop block 214. For example, if the sampling disc 31 needs to sample within a water depth range of one to one and a half meters, it is only necessary to adjust the threaded rod 216 so that the sum of the pulling force of the tension spring 217 on the stop block 214 and the pushing force of the push spring 215 on the stop block 214 equals the water pressure at a depth of approximately one meter. When the sampling disc 31 is lowered into this water depth range, water enters the inlet pipe 28 through the opening in the side wall of the inlet pipe 28, squeezing the stop block 214. At this time, the water pressure overcomes the pulling force of the tension spring 217 on the stop block 214 and the pushing force of the push spring 215 on the stop block 214. The thrust of block 214, if it continues to move downward, will push block 214 to slide along the inlet pipe 28, so that the inlet 210 and outlet 211 on the surface of the inlet pipe 28 are connected. Water flows into the inlet pipe 28 through the inlet 210 and then into the water storage box 22 through the outlet 211. If it continues to move downward, block 214 will continue to move, and the inlet 210 and outlet 211 will no longer be connected. At this time, water will not continue to flow into the water storage box 22, so that sampling can be carried out only within the set water depth range. The three sets of sampling discs 31 correspond to different water depths. The threaded rods 216 corresponding to the three sets of sampling discs 31 can be adjusted respectively, so as to achieve sampling of water at different water depths at the same time.
[0043] Simultaneously, the servo motor 11 also drives the sampling disc 31 to rotate via the rotating cylinder 32. When a set of sampling slots 33 rotates to below the water storage box 22, the squeezing strip 23 inside the water storage box 22 squeezes the squeezing ball 39. The squeezing ball 39 slides into the connecting pipe 34 under pressure. The squeezing ball 39 pushes the sliding sleeve 36 to slide along the sliding rod 37, and the compression spring 38 is compressed. Under normal conditions, the limiting ring 310 abuts against the inner wall of the connecting pipe 34 to seal the connecting pipe 34. When the squeezing ball 39 is squeezed, the water in the water storage box 22 flows in through the gap between the squeezing ball 39 and the connecting pipe 34, and then through the limiting groove 310. Water 11 flows into the connecting pipe 34, and then flows into the sampling tank 33 through the flow hole 35 on the surface of the connecting pipe 34 for collection. The rotation speed of the sampling disc 31 can be controlled by the servo motor 11, thereby controlling the time when the water in the water storage box 22 flows into the sampling tank 33, so as to sample water at the same water depth range at different times. Since the lower water storage box 22 is connected to the threaded sleeve 29, only the upper water storage box 22 can be filled with water. The water inlet of the water storage box 22 can be addressed by replacing the threaded sleeve 29. If you want water to enter the water storage box 22, you only need to replace the threaded sleeve 29 with the water inlet pipe 28.
[0044] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
[0045] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here.
[0046] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be elaborated upon in this invention.
[0047] Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.
Claims
1. A water quality sampler for environmental monitoring comprising a servo motor (11) characterised in that: The servo motor (11) is detachably connected to a connecting cylinder (12) at its lower end face; it also includes a pressure-controlled water inlet mechanism, which has three sets of equidistant vertical arrangements, including a mounting frame (21), which has four sets of water storage boxes (22) inside the mounting frame (21), which has multiple sets of extrusion strips (23) inside the water storage boxes (22), which has two sets of fixing rings (24) coaxially arranged on the mounting frame (21), which has a side wall fixedly connected to the side wall of the water storage box (22), and the uppermost fixing ring (24) fixedly connected to the inner side wall of the connecting cylinder (12); it also includes a sampling mechanism, which has three sets of sampling mechanisms corresponding to the pressure-controlled water inlet mechanism, including a sampling plate (31), which is rotatably connected to the mounting frame (21), and the outer surface of the sampling plate (31) abuts against the lower end face of the water storage box (22) and the extrusion strip (23), which has a sampling plate (31) rotatably connected to the mounting frame (21), and the outer surface of the sampling plate (31) abuts against the lower end face of the water storage box (22) and the extrusion strip (23), which has a sampling plate (31) rotatably connected to the mounting frame (21), and the outer surface of the sampling plate (31) abuts against the lower end face of the water storage box (22) and the extrusion strip (23), which has a sampling plate (31) rotatably connected to the mounting frame (21), which has an outer surface abutting against the lower end face of the water storage box (22) and the extrusion strip (23), and the sampling plate (31) The device contains multiple sets of connecting pipes (34), each with multiple sets of flow holes (35). Two sets of sliding sleeves (36) are slidably connected within the connecting pipes (34). The two sets of sliding sleeves (36) are connected by sliding rods (37), and the two sets of sliding sleeves (36) are slidably connected to the sliding rods (37). A compression spring (38) is fitted onto the outer surface of the sliding rod (37), and both ends of the compression spring (38) are respectively connected to the two sets of sliding sleeves (36). The sidewall is fixedly connected, and the sidewall of the sliding sleeve (36) is connected to a compression ball (39). The compression ball (39) is slidably connected to the sampling plate (31). A limiting ring (310) is sleeved on the outer surface of the sliding sleeve (36). The limiting ring (310) abuts against the inner sidewall of the connecting pipe (34). The limiting ring (310) is slidably connected to the inner sidewall of the connecting pipe (34). A limiting groove (311) is opened on the limiting ring (310).
2. The environmental monitoring water quality sampler according to claim 1, characterized in that: The upper end face of the mounting bracket (21) is provided with multiple sets of insert rods (25), and the lower end face of the mounting bracket (21) is provided with multiple sets of fixing sleeves (26) adapted to the insert rods (25). The three sets of mounting brackets (21) are connected vertically through the insert rods (25) and fixing sleeves (26).
3. The environmental monitoring water quality sampler according to claim 2, characterized in that: The upper water storage box (22) is threaded with a threaded ring (27), and the threaded ring (27) is provided with two sets of water inlet pipes (28). The lower water storage box (22) is threaded with a threaded sleeve (29).
4. The environmental monitoring water quality sampler according to claim 3, characterized in that: The water inlet pipe (28) has two sets of water inlets (210) on the upper side and two sets of water outlets (211) on the lower side. The water outlets (211) are connected to the water storage box (22).
5. The environmental monitoring water quality sampler according to claim 4, characterized in that: The water inlet pipe (28) is provided with an intermediate ring (212), and a limiting rod (213) is provided at the center of the intermediate ring (212). Two sets of stop blocks (214) are symmetrically slidably connected in the water inlet pipe (28) about the intermediate ring (212). A push spring (215) is provided between the stop block (214) and the intermediate ring (212). One end of the push spring (215) is fixedly connected to the side wall of the intermediate ring (212), and the other end is fixedly connected to the side wall of the stop block (214).
6. The environmental monitoring water quality sampler according to claim 5, characterized in that: The inlet pipe (28) is rotatably connected to threaded rods (216) at both ends, and a tension spring (217) is threaded onto the threaded rods (216). The other end of the tension spring (217) is fixedly connected to the other side wall of the stop block (214).
7. The environmental monitoring water quality sampler according to claim 6, characterized in that: The sampling disk (31) is connected to a rotating cylinder (32) at its center. The rotating cylinder (32) is located inside the fixed ring (24) and is rotatably connected to the fixed ring (24). The uppermost rotating cylinder (32) is fixedly connected to the output end of the servo motor (11). The upper and lower three sets of rotating cylinders (32) are fixedly connected. The sampling disk (31) is provided with multiple sets of sampling slots (33).