Sampling device for water resource quality detection

Abstract

The invention relates to the field of water resource quality detection, in particular to a sampling device for water resource quality detection. The invention provides a water resource quality detection sampling device which comprises a sampling barrel, a barrel cover is arranged at an opening of the sampling barrel, clamping seats are symmetrically distributed on one side, close to the barrel cover, of the sampling barrel, clamping pins are arranged in the clamping seats, the barrel cover is locked through cooperation of the clamping pins and the clamping seats, and the sampling barrel is connected with the clamping seats. A plurality of sampling box bodies for containing water samples are vertically arranged in the sampling barrel, a water pump is arranged in the sampling barrel, and a water inlet pipe of the water pump extends to the outer side of the sampling barrel. The stratified sampling box body and the independent flow guide assembly are combined with the servo motor to drive the staggered box cover, so that accurate stratified collection of water samples at different depths is realized, and mixed pollution is avoided; a water flow switching assembly is additionally arranged, a pipeline is automatically flushed after sampling, a residual water sample is discharged into a liquid storage box, cross contamination is reduced, independence and representativeness of the water sample are guaranteed, and detection accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of water resource quality testing, and in particular to a sampling device for water resource quality testing. Background Technology

[0002] Water quality testing is a crucial component of environmental protection, ecological monitoring, and public health management, and the accuracy and reliability of sampling devices directly impact the accuracy of test results. Currently, water quality testing involves various water bodies, including rivers, lakes, and groundwater. The water quality distribution in different water areas can vary significantly, especially in terms of vertical stratification (such as changes in temperature, dissolved oxygen, and pollutant concentrations). Therefore, devices capable of accurately collecting water samples at different depths are needed.

[0003] Existing sampling devices have significant drawbacks: insufficient stratified sampling capability, with traditional devices often only able to collect surface or single-depth water samples, failing to obtain samples from different depths at the same location, resulting in biased water quality analysis data that fails to reflect the true distribution of pollution in the water body; in flowing water bodies such as rivers and streams, the devices are easily impacted and shaken by the water flow, affecting the accuracy of sampling depth control and potentially causing mixing of water samples from different layers, thus compromising sample representativeness; and the lack of an integrated cleaning and wastewater management mechanism, requiring manual cleaning of sampling containers before sampling, which is cumbersome and prone to secondary pollution, and direct discharge of cleaning wastewater can interfere with the testing environment, failing to meet environmental protection requirements.

[0004] Based on the above situation, there is an urgent need to develop an integrated device with multi-layer precise sampling, resistance to water flow interference, and integrated cleaning and storage functions, which has become an urgent requirement to improve the scientific nature and operability of water resource testing. Summary of the Invention

[0005] In order to overcome the shortcomings of traditional sampling devices, such as insufficient stratified sampling capability, susceptibility to water flow interference, lack of integrated cleaning and wastewater management, and inadequate storage functions, the technical problem of this invention is to provide a sampling device for water resource quality testing.

[0006] The technical solution of the present invention is as follows: a sampling device for water resource quality testing, comprising a sampling barrel, a barrel lid at the opening of the sampling barrel, symmetrically distributed locking seats on the side of the sampling barrel near the barrel lid, each locking seat having a locking pin, the barrel lid being locked by the cooperation of the locking pin and the locking seat, a plurality of sampling boxes for holding water samples being arranged vertically inside the sampling barrel, a water pump being provided inside the sampling barrel, the water pump having an inlet pipe extending to the outside of the sampling barrel, a main sampling pipe being provided on the outlet pipe of the water pump, and a flow guiding component that can be independently controlled to open and close between the main sampling pipe and each sampling box, serving as a flow diversion control structure.

[0007] More preferably, the flow guiding assembly includes a servo motor installed near the opening of the sampling barrel, the output shaft of which is fixedly connected to a rotating shaft via a coupling. The rotating shaft passes through each sampling box in sequence and is rotatably connected to the bottom wall of the sampling barrel. Several box covers are fixedly connected to the rotating shaft, each box cover having a liquid inlet hole. The liquid inlets on each box cover are staggered at a certain angle around the rotating shaft, forming a layered independent control structure. Several flow guiding frames are fixedly connected to the inner wall of the sampling barrel, each having a liquid outlet hole. The water pump inlet pipe is connected to the uppermost flow guiding frame, and adjacent flow guiding frames are connected to each other via connecting pipes. The bottom of the lowermost flow guiding frame has a drain pipe fixedly connected to it.

[0008] More preferably, each flow guide is rotatably connected to a switching channel block, and the switching channel block has a first through groove in a vertical through shape and a second through groove in an arc shape on the top side. A linkage component is provided between adjacent switching channel blocks and the box cover.

[0009] More preferably, each guide frame is fixed to the top of a bracket, and the switching channel blocks extend from the adjacent brackets. A reset torsion spring is connected between the two, and the reset torsion spring is wound around the adjacent switching channel block. A transmission component is provided between the adjacent brackets and the switching channel blocks, and a gear is provided on each component. A rack is provided on each cover, and the racks and gears on the same layer mesh to form a gear transmission system.

[0010] More preferably, a liquid storage box is fixedly connected to the bottom of the sampling bucket, and the outlet end of the drain pipe extends into the liquid storage box.

[0011] More preferably, the bottom of the drain pipe is fixedly connected to a guide pipe located inside the liquid storage box, and the bottom wall of the liquid storage box has a fixed circular plate with several drain holes in the drain outlet. The bottom of the rotating shaft is fixedly connected to a water guide frame with a water outlet hole. The water guide frame rotates in the drain outlet of the liquid storage box. A float plate is slidably connected between the guide pipe and the water guide frame. The float plate is connected to the inner side of the top of the liquid storage box with symmetrically distributed compression springs. The compression springs are wound around the guide pipe and the water guide frame.

[0012] More preferably, the bottom of the liquid storage box is provided with an inverted cone-shaped counterweight as a weight-increasing and stabilizing structure.

[0013] More preferably, the end of the water pump inlet pipe is provided with a filter element as an impurity filtration structure.

[0014] More preferably, each sampling box is equipped with a conduit for discharging water samples, and the conduit extends to the outside of the sampling bucket, with a one-way valve at the outlet end of each conduit.

[0015] The present invention has the following advantages: By setting up a sampling box with layered storage and an independently controllable flow guiding component, combined with the rotation of the staggered box cover driven by a servo motor, the present invention achieves precise layered collection of water samples at different depths, effectively avoiding the mixed contamination of water samples from different layers in traditional sampling; at the same time, the added water flow switching component can automatically switch to the flushing channel after each sampling, and use a water pump to discharge the residual water sample in the pipeline into the storage box through the drain pipe for temporary storage, thoroughly removing the sample from the previous depth, significantly reducing the risk of cross-contamination, ensuring the independence and representativeness of water samples at each depth, and improving the accuracy and reliability of the detection data.

[0016] This invention collects flushing wastewater through a storage box and combines it with a float pressurization and porous slow-discharge structure to achieve gentle and slow discharge of flushing water, avoiding disturbance to the water area caused by direct drainage and resistance interference from the sinking of the sampling bucket. The bottom inverted conical counterweight design enhances overall stability, counteracts initial buoyancy and resists the influence of undercurrents, ensuring the vertical sinking of the sampling bucket and guaranteeing the accuracy of sampling at different depths at the same location. The inlet filter effectively intercepts debris, preventing pipe blockage and sample contamination, further improving the purity of the water sample and the reliability of the device, making it suitable for high-quality sampling needs in complex natural water bodies. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of the present invention.

[0018] Figure 2 A three-dimensional structural cross-sectional view of the present invention.

[0019] Figure 3 A three-dimensional structural cross-sectional view of the sampling box body, box cover, and switching channel block of the present invention.

[0020] Figure 4 A three-dimensional structural diagram of the water pump, connecting pipe, and flow guide frame of the present invention.

[0021] Figure 5 A three-dimensional structural diagram of the components of the present invention, including the flow guide frame, switching channel block, and transmission assembly.

[0022] Figure 6 A three-dimensional structural cross-sectional view of the liquid storage box, compression spring, and float plate of the present invention.

[0023] Figure 7 A three-dimensional structural diagram of the water guide frame and the fixed circular plate of the present invention.

[0024] The markings in the attached diagram are as follows: 1_Sampling bucket, 11_Bucket lid, 12_Clamping pin, 13_Sampling box body, 131_One-way valve, 14_Box lid, 15_Servo motor, 151_Rotating shaft, 16_Water pump, 161_Drain pipe, 162_Filter element, 163_Connecting pipe, 17_Flow guide frame, 171_Bracket, 18_Switching channel block, 19_Reset torsion spring, 110_Transmission assembly, 111_Gear, 112_Rack, 113_First through groove, 114_Second through groove, 115_Outlet hole, 116_Inlet hole, 2_Storage box, 21_Float plate, 22_Compression spring, 23_Counterweight, 24_Flow guide pipe, 25_Water guide frame, 26_Fixing disc. Detailed Implementation

[0025] The preferred technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Example 1: A sampling device for water resource quality testing, such as... Figure 1 and Figure 2 As shown, the sampling container includes a sampling bucket 1 as the main body for sampling. The opening of the sampling bucket 1 is provided with a lid 11, and the top of the lid has a hanging ring for suspension and lifting. Symmetrically distributed mounting seats are located on the side of the sampling bucket 1 near the lid 11, each seat containing a locking pin 12. The locking pin 12 and the mounting seat cooperate to form a locking mechanism, ensuring the lid 11 is tightly and securely placed on the sampling bucket 1, preventing water from seeping in during sampling. Inside the sampling bucket 1, several vertically arranged sampling boxes 13 are used to hold water samples. This is a stratified sampling unit used to obtain water samples at different depths. The sampling bucket 1 is equipped with a water pump 16 that provides pumping power. Its inlet pipe extends to the outside of the sampling bucket 1, serving as a water intake channel to draw water samples into the sampling box 13. The outlet pipe of the water pump 16 is equipped with a main sampling pipe. Each main sampling pipe and each sampling box 13 is equipped with a flow guiding component that can be independently controlled to open and close, serving as a flow diversion control structure to accurately draw water sample specimens from each depth into the corresponding sampling box 13.

[0027] Each sampling box 13 is equipped with a conduit for discharging water samples, and the conduit extends to the outside of the sampling bucket 1. Each conduit outlet is equipped with a one-way valve 131 for sealing, which is initially in a closed state, so that the sampling box 13 is in a relatively sealed state, preventing water samples from flowing out of the sampling box 13 or external impurities from entering.

[0028] When collecting water samples, staff members use a graduated rope to secure the ring on the lid 11 of the sampling container. Standing on the bridge or boat, they hold the rope and slowly lower the sampling container 1 into the water. The sampling container 1 sinks under its own weight, and the sinking depth is controlled by releasing the rope. The depth is monitored in real time by the scale on the rope.

[0029] Upon reaching the first target depth, activate the upper flow guide component while keeping the others closed. Start water pump 16 to extract water at that depth. The water sample flows through the main sampling pipe and the upper flow guide component into the corresponding sampling container 13, completing the sampling at that depth. Turn off water pump 16 and the upper flow guide component, and continue releasing the rope to the second target depth. Activate the corresponding flow guide component and start water pump 16 to guide the water sample into the corresponding sampling container 13. Repeat this process until sampling at all target depths is complete.

[0030] After sampling is completed, turn off water pump 16 and use a rope to pull out the water from sampling bucket 1. Take a marked test tube, align the tube opening with the bottom of the guide tube, and open the one-way valve 131 to allow the water sample to flow into the test tube. Repeat this process to extract water samples from each depth and send them to the laboratory for testing.

[0031] like Figures 2-5 As shown, the flow guiding assembly includes a servo motor 15 installed near the opening of the sampling barrel 1 as the power source for flow guiding control; its output shaft is fixedly connected to a rotating shaft 151 via a coupling, which undertakes the torque transmission function; the rotating shaft 151 passes through each sampling box 13 in sequence and is rotatably connected to the bottom wall of the sampling barrel 1, playing a supporting and rotational guiding role; several box covers 14 are fixedly connected to the rotating shaft 151 as sealing and on / off control components for the sampling box 13, the number of which is equal to the number of sampling box 13, and adjacent box covers 14 are rotatably connected to the sampling box 13; each box cover 14 has a liquid inlet hole 116 as a water sample inflow channel, and the liquid inlet holes 116 on each box cover 14 are arranged in a staggered manner with the rotating shaft 151 as the axis, forming a layered independent control structure.

[0032] The sampling container 1 has several vertically distributed guide frames 17 fixedly attached to its inner wall as water sample diversion and transmission frames. Each guide frame 17 has a liquid outlet hole 115. The number of guide frames 17 is the same as that of the sampling box 13. The water inlet pipe of the water pump 16 is connected to the uppermost guide frame 17. Adjacent guide frames 17 are connected to each other through connecting pipes 163 to form a water sample transport channel. The bottom of the lowermost guide frame 17 has a drain pipe 161 fixedly attached to its bottom for discharging residual water.

[0033] When the sampling container 1 sinks to the first target depth, the servo motor 15 drives the rotating shaft 151 to rotate clockwise, causing each cover 14 to rotate synchronously. Because the liquid inlet holes 116 are staggered, when the liquid inlet hole 116 of the upper cover 14 is aligned with the liquid outlet hole 115 of the corresponding guide frame 17, the holes of the other layers remain staggered. At this time, the water sample drawn by the water pump 16 flows into the upper sampling box 13 through the upper guide frame 17 and the liquid inlet hole 116, completing the first depth sampling.

[0034] After the first target depth sampling is completed, as the rotating shaft 151 continues to drive the cover 14 to continue rotating, the liquid inlet 116 of the upper cover 14 and the liquid outlet 115 of the corresponding guide frame 17 will be misaligned. At this time, the upper box 13 is in a sealed state, and external water will no longer flow into the upper box 13.

[0035] After the sampling container 1 sinks to the second target depth, the servo motor 15 continues to drive the rotating shaft 151 to rotate, aligning the liquid inlet 116 of the middle layer cover 14 with the corresponding liquid outlet 115, thus opening the middle layer flow guiding component and allowing the water sample to flow into the middle layer sampling box 13. This logic is followed sequentially to complete the water sample collection at each depth.

[0036] After sampling the water at the first target depth is completed, when sampling the water at the second target depth is initiated, the water pump 16 delivers water samples to each sampling container 13 through the same sampling pipe. As the water pump 16 extracts the water at the second target depth and discharges it into the middle sampling container 13 via the middle guide frame 17, the water sample needs to flow through the upper guide frame 17. At this time, water samples from the first target depth remain in the upper guide frame 17. This results in the residual water sample from the first target depth mixing with the water sample at the second target depth, causing cross-contamination between water samples from different depths and compromising the authenticity and representativeness of the samples.

[0037] Therefore, after sampling the water at the first target depth, the sampling pipe needs to be flushed to remove as much of the residual water sample as possible. To achieve this, a water flow switching component is installed in each flow guide 17. By controlling the direction of water flow in the sampling pipe, the representativeness of the water sample is not affected when collecting water at the second target depth, thereby improving the accuracy of water sample testing.

[0038] like Figure 5 As shown, specifically, each flow guide 17 is rotatably connected to a switching channel block 18, which serves as the core component for switching water flow paths. The switching channel block 18 has a first through groove 113 that is vertically through and a second through groove 114 that is arc-shaped on the top side. The first through groove 113 is used to form a flushing channel, and the second through groove 114 is used to form a sampling channel.

[0039] When the first through groove 113 of each switching channel block 18 is aligned vertically with the adjacent connecting pipe 163, the water outlet pipe of the water pump 16, the switching channel block 18, the connecting pipe 163 and the drain pipe 161 form a vertically connected flushing passage, which can discharge the residual water sample in the sampling pipe; when the upper switching channel block 18 is rotated counterclockwise until the second through groove 114 is aligned with the water inlet pipe of the water pump 16 and the liquid outlet hole 115 of the upper guide frame 17, an independent sampling passage is formed to ensure that the water sample flows accurately into the upper sampling box 13.

[0040] After sampling at the first target depth is completed, the upper switching channel block 18 is rotated until the first through slot 113 is aligned with the connecting pipe 163. The water pump 16 is started, and water flows through the flushing passage and is discharged from the drain pipe 161 to flush the water sample remaining at the first depth in the sampling pipe.

[0041] After rinsing, the sampling container 1 is lowered to the second target depth. The middle layer switching channel block 18 is rotated so that its second channel 114 is aligned with the water inlet pipe of the water pump 16 and the liquid outlet 115 of the middle layer guide frame 17, while keeping the first channel 113 of the other switching channel blocks 18 closed. The water pump 16 is started, and the water sample from the second depth flows into the middle layer sampling box 13 through the middle layer sampling passage, avoiding mixing with water samples from other depths and ensuring sample representativeness. Sampling at each depth is completed sequentially according to this process to improve the accuracy of detection.

[0042] To achieve automatic linkage between the lid 14 and the switching channel block 18, a linkage component is added.

[0043] like Figure 3 As shown, specifically, each guide frame 17 has a support bracket 171 fixedly attached to its top. Each switching channel block 18 extends from an adjacent support bracket 171, and a reset torsion spring 19 providing reset force is connected between them. The reset torsion spring 19 is wound around the adjacent switching channel block 18. A transmission assembly 110 is provided between adjacent support brackets 171 and switching channel blocks 18, which consists of two transmission wheels and a flat belt. Each switching channel block 18 has a transmission wheel fixedly attached to it, and each support 171 has another transmission wheel on the side near the rotating shaft 151. A gear 111 is fixedly attached to the bottom of each of the transmission wheels, and a flat belt is wound between the transmission wheels at the same height. Each cover 14 has a rack 112, and the racks 112 on the same layer mesh with the gears 111 to form a gear 111 transmission system to realize power transmission.

[0044] When the servo motor 15 drives the rotating shaft 151 to rotate the cover 14 clockwise, the rack 112 rotates synchronously. The upper rack 112 first meshes with the gear 111 of the same layer, driving the gear 111 to rotate, which in turn drives the switching channel block 18 to rotate via the transmission assembly 110, causing the reset torsion spring 19 to twist.

[0045] When the second channel 114 of the switching channel block 18 is aligned with the liquid outlet 115, the liquid inlet 116 of the cover 14 is aligned synchronously, the first channel 113 is offset from the connecting pipe 163, and the water sample of the first target depth drawn by the water pump 16 flows into the upper sampling box 13 through the second channel 114.

[0046] The rotating shaft 151 continues to rotate, the upper rack 112 separates from the gear 111, the reset torsion spring 19 drives the switching channel block 18 to reset, the first through groove 113 aligns with the connecting pipe 163, the water pump 16 draws water and discharges it through the drain pipe 161 to rinse the residual water sample in the pipeline.

[0047] When sampling container 1 sinks to the second target depth, the middle layer rack 112 engages with gear 111, repeating the above action. The middle layer switching channel block 18 switches to the sampling state, and the water sample flows into the middle layer sampling box 13. This sequential operation ensures that there is no cross-contamination of water samples at each depth, improving sample representativeness and detection accuracy.

[0048] When rinsing the connecting pipe 163, the drain pipe 161 directly discharges water into the sampling area. On the one hand, this will generate an upward thrust, which will hinder the sampling bucket 1 from sinking to the next target depth. On the other hand, the impact of the drainage will disturb the water in the sampling area, causing the water to churn and fluctuate, affecting the accuracy of the water sample and causing detection errors.

[0049] like Figure 6 As shown, in order to solve the problem of direct discharge of rinsing water, a storage box 2 for storing rinsing water is fixed to the bottom of the sampling bucket 1, which serves as a collection container for rinsing wastewater; the outlet end of the drain pipe 161 extends into the storage box 2, so that the water pumped in by the water pump 16 during rinsing can be temporarily stored in the storage box 2 through the drain pipe 161, thus preventing the rinsing water from being directly discharged into the water area.

[0050] When the switching channel block 18 rotates in the reverse direction to reset, and the first through slot 113 aligns with the connecting pipe 163, the water pump 16 continues to pump water to flush the connecting pipe 163. The flushing water flows into the storage box 2 through the drain pipe 161. During this process, the upward thrust generated by the direct discharge of flushing water is avoided, ensuring that the sampling bucket 1 can smoothly sink to the next target depth; at the same time, the disturbance of the water body in the sampling range by the drainage impact force is eliminated, ensuring the stability of the water body, ensuring the accuracy of subsequent water samples, and reducing detection errors.

[0051] Example 2: During multi-layer sampling, the liquid storage box 2 will gradually fill up due to the storage of rinsing water. Since its space is limited, if the liquid storage box 2 cannot be drained slowly and continuously in a gentle manner, it may overflow, affecting the normal operation of the device. Furthermore, rapid drainage may still cause disturbance to the sampling environment.

[0052] like Figure 6 and Figure 7 As shown, specifically, the bottom of the drain pipe 161 is fixedly connected to a guide pipe 24 located inside the liquid storage box 2, which is used to guide the rinsing water into the liquid storage box 2; the drain outlet on the bottom wall of the liquid storage box 2 is provided with a fixed circular plate 26 with several drain holes, which serves as a drainage flow limiting structure; the bottom of the rotating shaft 151 is fixedly connected to a water guide frame 25, which rotates within the drain outlet on the bottom wall of the liquid storage box 2, and the water guide frame 25 has a water outlet hole, which controls the flow of drainage by rotation; a float plate 21 is slidably connected between the guide pipe 24 and the water guide frame 25, and the float plate 21 is connected to the inner side of the top of the liquid storage box 2 with symmetrically distributed compression springs 22, which are wound around the guide pipe 24 and the water guide frame 25. The float plate 21 is used to apply pressure according to the change of liquid level, and the spring provides elastic pressure.

[0053] During rinsing, water from drain pipe 161 flows into storage box 2 via guide pipe 24, causing the liquid level to rise and lift float plate 21, compressing spring 22. The spring force causes float plate 21 to apply downward pressure to the water surface. Simultaneously, rotating shaft 151 drives water guide frame 25 to rotate, its outlet continuously aligning with the drain hole of fixed disc 26. Under the pressure of float plate 21, water in storage box 2 is continuously and slowly discharged through the small drain hole. Because the drain hole is small and the water is discharged sequentially, the impact force is weak, which will not disturb the sampling environment, and at the same time, it prevents storage box 2 from overflowing, ensuring continuous operation of the device.

[0054] Initially, the liquid storage box 2 is empty and contains air, which increases the buoyancy of the sampling bucket 1 and hinders its smooth sinking. At the same time, the undercurrents in rivers and lakes will cause the sampling bucket 1 to deviate from its sinking path and fail to descend in a straight line, affecting the accuracy of collecting samples at different depths at the same location.

[0055] To address the aforementioned issues, an inverted conical counterweight 23 is installed at the bottom of the liquid storage box 2 as a weight-increasing and stabilizing structure. The counterweight 23 increases the overall weight of the device, counteracts the initial buoyancy of the liquid storage box 2, and assists the sampling container 1 in sinking; the inverted conical design reduces water flow resistance, enhances the stability of the device, and prevents it from shifting due to undercurrents during sinking.

[0056] In the initial stage, the inverted conical counterweight 23 at the bottom of the liquid storage box 2 increases weight to counteract the buoyancy generated by the air inside the liquid storage box 2, making it easier for the sampling bucket 1 to sink into the water. During the sinking process, the inverted conical structure of the counterweight 23 reduces the impact of water flow, and its weight distribution characteristics effectively resist interference from undercurrents, ensuring that the sampling bucket 1 descends in a straight line. This ensures accurate collection of water samples at different depths from the same location, improving the representativeness and accuracy of the samples.

[0057] When taking water samples from rivers and lakes, floating leaves, aquatic plants and other garbage may clog the inlet pipe of water pump 16, increasing the risk of damage to water pump 16. At the same time, debris entering the water sample will affect the accuracy of the water sample and interfere with the test results.

[0058] To address the aforementioned issues, a filter element 162 is installed at the end of the water inlet pipe of the water pump 16 as a filter structure for impurities. The filter element 162 can intercept debris such as leaves, aquatic plants, and garbage in the water, preventing them from entering the water inlet pipe and clogging the pipe or damaging the water pump 16. At the same time, it ensures the purity of the water sample entering the sampling system and improves the accuracy of the water sample.

[0059] During water sampling, when the water pump 16 is working, the filter element 162 at the end of the inlet pipe filters the water, intercepting debris such as leaves, aquatic plants, and garbage, preventing debris from entering the inlet pipe and causing blockage or damage to the water pump 16. The filtered clean water sample enters the sampling pipeline, ensuring that the water samples flowing into each sampling box 13 are not contaminated by impurities, improving the accuracy of the water samples, and providing a reliable sample basis for the testing work.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sampling device for water resource quality testing, characterized in that, The sample includes a sampling bucket (1), with a bucket lid (11) at the opening. The sampling bucket (1) has symmetrically distributed card seats on the side near the bucket lid (11), and each card seat has a locking pin (12). The bucket lid (11) is locked by the cooperation of the locking pin (12) and the card seat. Several sampling boxes (13) for holding water samples are arranged vertically inside the sampling bucket (1). A water pump (16) is installed inside the sampling bucket (1), and its inlet pipe extends to the outside of the sampling bucket (1). A main sampling pipe is provided on the outlet pipe of the water pump (16). A flow guiding component that can be independently controlled to open and close is provided between the main sampling pipe and each sampling box (13) as a flow diversion control structure.

2. The sampling device for water resource quality testing according to claim 1, characterized in that, The flow guiding assembly includes a servo motor (15) installed near the opening of the sampling barrel (1), whose output shaft is fixedly connected to a rotating shaft (151) via a coupling. The rotating shaft (151) passes through each sampling box (13) in sequence and is rotatably connected to the bottom wall of the sampling barrel (1). Several box covers (14) are fixedly connected to the rotating shaft (151), and each box cover (14) has a liquid inlet hole (116). With the rotating shaft (151) as the axis, each box cover (14) has a liquid inlet hole (116). The inlet holes (116) are arranged in a staggered manner at a certain angle to form a layered independent control structure; the inner wall of the sampling bucket (1) is fixed with several vertically distributed guide frames (17), each with an outlet hole (115); the water inlet pipe of the water pump (16) is connected to the uppermost guide frame (17); adjacent guide frames (17) are connected to each other through connecting pipes (163); the bottom of the lowermost guide frame (17) is fixed with a drain pipe (161).

3. A sampling device for water resource quality testing according to claim 2, characterized in that, Each flow guide (17) is rotatably connected to a switching channel block (18). The switching channel block (18) has a first through groove (113) that is vertically through and a second through groove (114) that is arc-shaped on the top side. A linkage component is provided between adjacent switching channel blocks (18) and the cover (14).

4. A sampling device for water resource quality testing according to claim 3, characterized in that, Each guide frame (17) is fixed to the top of a bracket (171). The switching channel block (18) passes through the adjacent bracket (171). A reset torsion spring (19) is connected between the two. The reset torsion spring (19) is wound around the adjacent switching channel block (18). A transmission component (110) is provided between the adjacent bracket (171) and the switching channel block (18). A gear (111) is provided on each of the components. A rack (112) is provided on each of the box covers (14). The rack (112) on the same layer meshes with the gear (111) to form a gear (111) transmission system.

5. A sampling device for water resource quality testing according to claim 4, characterized in that, The bottom of the sampling bucket (1) is fixedly connected to a liquid storage box (2), and the outlet end of the drain pipe (161) extends into the liquid storage box (2).

6. A sampling device for water resource quality testing according to claim 5, characterized in that, The bottom of the drain pipe (161) is fixedly connected to a guide pipe (24) located inside the liquid storage box (2). The bottom wall of the liquid storage box (2) is provided with a fixed circular plate (26) with several drainage holes. The bottom of the rotating shaft (151) is fixedly connected to a water guide frame (25) with a water outlet hole. The water guide frame (25) rotates in the drain of the liquid storage box (2). A float plate (21) is slidably connected between the guide pipe (24) and the water guide frame (25). The float plate (21) is connected to the inner side of the top of the liquid storage box (2) with symmetrically distributed compression springs (22). The compression springs (22) are wrapped around the guide pipe (24) and the water guide frame (25).

7. A sampling device for water resource quality testing according to claim 6, characterized in that, The bottom of the liquid storage box (2) is provided with an inverted cone-shaped counterweight (23) as a weight-increasing and stabilizing structure.

8. A sampling device for water resource quality testing according to claim 7, characterized in that, The water pump (16) has a filter element (162) at the end of its inlet pipe as a structure for filtering impurities.

9. A sampling device for water resource quality testing according to claim 8, characterized in that, Each sampling box (13) is equipped with a conduit for discharging water samples, and the conduit extends to the outside of the sampling bucket (1). Each conduit is equipped with a one-way valve (131) at the outlet end.

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