Device and method for efficiently detecting water quality in early stage of water conservancy construction

Abstract

The invention relates to the technical field of water quality detection, in particular to a water conservancy construction early-stage efficient water quality detection device and method.The water conservancy construction early-stage efficient water quality detection device comprises a ship body, a power source, a clear water tank, a sampling mechanism, a pump set and a detection mechanism are installed on the ship body, the detection mechanism comprises a center column and a plurality of annular sectors, and the water inlet end of the pump set is connected with the sampling mechanism through a pipeline; a ship body is used as a field bearing platform, a pump set, a detection mechanism, a clear water tank and a nitrogen tank are systematically integrated, and continuous collection and detection of multiple samples and retention and recycling treatment of polluted water within the same time period are realized through switching control of multi-cavity organization and a central column of a circular sector; under the fast-paced and multi-point working condition in the early stage of water conservancy construction, the operation efficiency and the sample management capacity are remarkably improved through multi-sample parallel and alternate detection, the representativeness of the detection result is improved through middle value detection, meanwhile, sealing, cleaning and drying can be conducted after detection, sample crossing errors are restrained, accuracy and repeatability are guaranteed, and extra equipment is not needed.

Description

A high-efficiency water quality testing device and method for the early stage of water conservancy construction Technical Field

[0001] This invention relates to the field of water quality testing technology, specifically to a high-efficiency water quality testing device and method for the early stage of water conservancy construction. Background Technology

[0002] In the early stages of construction, water conservancy projects typically require rapid water quality verification and baseline surveys of the proposed construction area and its upstream and downstream regions. This provides a basis for construction organization, cofferdam diversion, water intake and drainage layout, disposal of waste and mud, and formulation of ecological and environmental protection measures, thereby preventing water pollution.

[0003] The testing at this stage is characterized by typical field-based features: scattered testing points, short time windows, high sampling frequency, and often accompanied by complex hydrodynamic conditions such as water level fluctuations, flow velocity changes, steep bank slopes, or near-shore backflow. This requires testing equipment to have the ability to quickly arrive, operate continuously, and provide highly comparable results. Therefore, efficient water quality testing in the early stage of construction has become the core requirement for field operations.

[0004] Chinese patent document (publication number: CN120064598B) discloses a water quality testing device and its testing method. The water quality testing device includes a pretreatment tank, a decontamination module, an inlet water sample module, a filter module, a synchronous belt, a water quality analyzer, and a self-cleaning module. The decontamination module is installed in the pretreatment tank. The inlet end of the filter module is connected to the pretreatment tank through the inlet water sample module. The outlet end of the filter module is connected to the water quality analyzer. The filter module is equipped with a self-cleaning module. The self-cleaning module drives the decontamination module to operate synchronously through the synchronous belt. When the self-cleaning module is running, the decontamination module is driven to operate synchronously through the synchronous belt. The scraper installed on the chain guides the oil film-like suspended pollutants on the water surface to the surface collection box. The sludge-like suspended pollutants deposited at the bottom of the water are pushed into the conical pit. The first suction pump is responsible for exporting the oil film-like suspended pollutants, thereby removing the oil film-like suspended pollutants.

[0005] In existing technologies, during the fast-paced, multi-point testing scenarios in the early stages of water conservancy construction, current on-site testing platforms often struggle to achieve continuous collection, testing, and contaminated water retention and management of multiple samples simultaneously. This results in low sample turnover efficiency and inconvenience in retaining and tracing abnormal samples. Furthermore, after being pumped into the water tank, the sample water is prone to non-uniform distribution, such as velocity gradients, boundary layers, and bottom sedimentation. Conventional testing probes, due to structural limitations, typically take values ​​at the tank walls or edges, making it difficult to penetrate the middle of the water body. This leads to insufficient representativeness of the test parameters due to edge effects and sediment disturbances. Additionally, during the rotation testing of samples from different tanks or areas, water from the previous sample can easily remain on the surface of the testing module and in structural gaps, carrying it into the next sample and causing cross-contamination and systematic deviations in the test data, thus affecting the accuracy and repeatability of the tests. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a highly efficient water quality testing device and method for the early stages of water conservancy construction. Using a ship as the on-site platform, it systematically integrates pump units, testing mechanisms, clean water tanks, and nitrogen tanks. Through multi-cavity organization of the circular sector and switching control of the central column, it achieves continuous collection, testing, retention of contaminated water, and recirculation of multiple samples within the same time period. Its overall function is to significantly improve operational efficiency and sample management capabilities under the fast-paced, multi-site conditions of early-stage water conservancy construction by using parallel and rotating testing of multiple samples. Furthermore, it enhances the representativeness of test results through mid-point sampling and testing. Simultaneously, it can suppress cross-sample errors through sealing, cleaning, and drying after testing, ensuring accuracy and repeatability without requiring additional equipment, thus saving costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency water quality testing device for the early stage of water conservancy construction, comprising a hull, on which a power supply, a clean water tank, a sampling mechanism, a pump set, and a testing mechanism are installed; the testing mechanism includes a central column and multiple annular segments with hollow cavities, the inlet end of the pump set is connected to the sampling mechanism through a pipeline, and the outlet end of the pump set is connected to the inlet of the annular segments through a pipeline; the multiple annular segments enclose to form an annular column, the bottom of the annular column has a detachable mounting base plate, a central disk is set in the central cylindrical hole of the annular column, and the central disk is fixedly connected to the multiple annular segments; the central column is rotatably mounted on the top of the central disk, in... A motor is installed at the bottom of the central disk, and a rotating shaft is installed at the output end of the motor. The rotating shaft rotates through the central disk and is then fixedly connected to the central column. A groove is opened on the central column, and a pushing mechanism is set inside the groove. A detection module is set at the telescopic end of the pushing mechanism. Openable and closable sealed channels are set on the inner walls of multiple annular sector segments. During detection, the pushing mechanism extends into the open sealed channel of the annular sector segment, so that the detection module is located in the middle of the annular sector segment to detect the water sample, thereby reflecting the true water quality of the sample. After the detection is completed, the pushing mechanism retracts and forms a cleaning chamber with the closed sealed channel to clean the residual water sample in the detection module and avoid cross-contamination affecting the next detection result.

[0008] Preferably, the trough includes an installation groove and a sliding groove, and the pushing mechanism includes an electric telescopic cylinder and a slider. The installation groove and the sliding groove are located on the outer circumferential surface of the central column, and the slider is slidably installed in the sliding groove. A piston cylinder is opened on the side of the slider facing the annular fan segment, and a piston is slidably arranged inside the piston cylinder. The electric telescopic cylinder is fixed in the installation groove, and the telescopic rod of the electric telescopic cylinder slides through the sliding groove. The telescopic rod located in the sliding groove slides through the slider and is fixedly connected to the piston. A first return spring is connected between the piston and the bottom of the piston cylinder. The piston cylinder opening of the slider extends towards the annular fan segment to form a docking cylinder. The telescopic rod extends into the docking cylinder, and a detection module is fixed at a certain distance from the end of the telescopic rod. A nozzle is provided on the piston panel. The docking cylinder and the annular fan segment dock together to form a sealed space to complete water sample detection and self-cleaning.

[0009] Preferably, the sealing channel includes an opening on the inner wall of the annular fan segment, in which a ring is sealed and fixed; a cap is provided at the ring located inside the cavity of the annular fan segment, and guide rods are provided on both sides of the cap, with the two ends of the guide rods respectively fixedly connected to the inner wall of the cavity of the annular fan segment; ear plates on both sides of the ring are slidably sleeved on the guide rods, and a second return spring is slidably sleeved on the guide rods, with the two ends of the second return spring respectively fixedly connected to the ear plates and the inner wall of the cavity of the annular fan segment, maintaining the seal of the cap in sealing contact with the ring; a discharge pipe and a solenoid valve are provided at the bottom of the ring.

[0010] Preferably, the sampling mechanism includes a support plate fixedly installed on one side of the hull, a T-slot is provided on the support plate, a T-plate is slidably installed in the T-slot, and a toothed plate is fixed on one side of the T-plate; a sampling motor is fixed on the support plate, and a gear is fixed at the output end of the sampling motor, the gear meshing with the toothed plate to adjust the lifting and lowering of the T-plate; a conduit is passed through the T-plate, one end of the conduit extends to the bottom end of the T-plate, and the other end of the conduit is connected to the input end of the sampling pump of the pump group through a hose, and the output end of the sampling pump is connected to the inlet of the annular sector cavity through a pipeline.

[0011] Preferably, a vortex inlet is provided on the opposite side of the inner wall of the ring along the tangential direction to facilitate the formation of circulation; a clear water pipe is provided inside the wall of the circular annular fan section, one end of the clear water pipe extends to the clear water pump of the external pump group, and the other end of the clear water pipe is connected to the vortex inlet.

[0012] Preferably, a first sealing bevel is provided at the end of the connecting cylinder, and a second sealing bevel is provided at the end of the ring sleeve corresponding to the first sealing bevel.

[0013] Preferably, a nitrogen tank is installed on the hull, and a three-way valve is installed at the front end of the cyclone inlet. The outlet of the three-way valve is connected to the cyclone inlet, the inlet one of the three-way valve is connected to the clean water pipe, and the inlet two of the three-way valve is connected to the nitrogen tank; solenoid valves are respectively installed at the two sets of inlets of the three-way valve.

[0014] Preferably, the pump set integrates multiple functional pumps, including a sampling pump, a drainage pump, a clean water pump, and an air pump, which are connected to their respective locations through different pipelines, and solenoid valves are installed in the pipelines.

[0015] Preferably, alignment marks are provided at the top of the central column and the top of each group of annular sector segments to check the position between the docking cylinder and the ring sleeve.

[0016] A method for water quality testing using the aforementioned high-efficiency water quality testing device for pre-construction water conservancy projects includes the following steps: S1. Driving the vessel to a predetermined position, and using a sampling motor to drive the toothed plate to raise and lower the T-shaped plate along the support plate, so that the water intake end of the conduit reaches a set depth; S2. Starting the pump unit to extract water samples through the conduit and transport them to the hollow cavity of the annular fan section, forming the environment for the water sample to be tested; S3. Driving the central column to rotate by the motor to align the docking cylinder with the ring sleeve at the inner opening of the annular fan section; then, driving the telescopic rod to extend by the electric telescopic cylinder, causing the first sealing bevel at the end of the docking cylinder to achieve a sealing fit with the second sealing bevel at the end of the ring sleeve; S4. Driving the telescopic rod to extend further by the electric telescopic cylinder, the telescopic rod pushes open the cover and overcomes the second return spring to guide the cover to move along the guide rod, so that the testing module extends into the middle of the annular fan section through the ring sleeve to test the water sample; S5. After the test is completed, driving the telescopic rod to retract by the electric telescopic cylinder. The cap resets under the action of the second return spring and makes sealing contact with the ring sleeve. At the same time, the piston drives the docking cylinder to form a sealed space with the ring sleeve and the cap under the action of the first return spring. S6: Water is supplied from the clean water tank to the pump group and rinsed through the nozzle to the detection module in the sealed space. Then, fluid is introduced into the ring sleeve through the vortex inlet to form circulation to enhance the replacement and cleaning effect. The rinsing liquid is discharged through the discharge pipe. S7: By switching the three-way valve at the front end of the vortex inlet, the vortex inlet is connected to the nitrogen tank, and the discharge pipe is opened to blow air to dry the components in the sealed space. S8: After S7 is completed, the next annular sector detection cycle begins. The annular sector that meets the standard is emptied and the next sample is received immediately, realizing continuous turnover and high-throughput operation. Samples that do not meet the standard can be stored in the corresponding annular sector and brought back with the ship for subsequent re-inspection and research analysis, avoiding the time waste caused by repeated sampling and re-arrangement.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses the ship hull as the on-site carrying platform and systematically integrates the pump set, detection mechanism, clean water tank and nitrogen tank. Through the multi-cavity organization of the circular sector and the switching control of the central column, it realizes the continuous collection and detection of multiple samples in the same period, as well as the retention and recycling of polluted water. Its overall function is to significantly improve the work efficiency and sample management capability in the fast-paced and multi-point working conditions in the early stage of water conservancy construction by using parallel and rotating detection of multiple samples. Moreover, it improves the representativeness of the detection results by taking values ​​in the middle. At the same time, it can also suppress cross-sample error by sealing, cleaning and drying after detection, ensuring accuracy and repeatability, without the need for additional equipment, thus saving costs.

[0018] 2. In this invention, the detection tank is designed as an array structure of multiple circular sector segments, enabling the device to collect and test multiple samples in separate compartments within the same time window. This allows for continuous turnover and high-throughput operation by emptying the circular sector segments that meet the standards after testing and immediately receiving the next sample. Conversely, samples that do not meet the standards can be stored in their corresponding circular sector segments and brought back with the ship for subsequent re-inspection and research analysis, avoiding the time wasted by repeated sampling and re-arrangement. At the same time, the independent storage of multiple circular sector segments makes the sample status traceable and comparable, significantly improving on-site handling efficiency and task completion rate.

[0019] 3. In this invention, addressing the issue that after sample water is pumped into the annular sector by the pump unit, flow velocity gradients, boundary layers, and bottom sedimentation easily occur, leading to non-uniform distribution of water quality parameters, and that traditional probes are usually limited to taking values ​​only in the edge area due to the proximity of the tank wall or opening, this invention achieves alignment switching by driving the central column with a motor, and uses an electric telescopic cylinder to drive the telescopic rod to push the detection module through the docking cylinder and the ring sleeve to align the opening and extend into the middle of the water body in the annular sector. This structurally overcomes the limitation of probes being unable to penetrate deep into the bulk water body. This middle detection method can avoid the influence of the boundary layer near the tank wall and reduce the bias of the readings caused by bottom sedimentation and upper disturbances, effectively weakening the differences between the edge, bottom, and middle, thereby significantly improving the true representativeness of the detection results for the sample bulk water quality.

[0020] 4. In this invention, to address the problem that water from the previous sample can easily remain on the surface and structural gaps of the detection module when rotating samples from different annular segments or regions, leading to cross-contamination and systemic deviations caused by the introduction of new samples after switching, a reliable sealing connection is formed between the docking cylinder and the ring sleeve. During the retraction phase, the piston cooperates with the first return spring, and the cap cooperates with the second return spring, so that the docking cylinder, ring sleeve, cap, and piston form a controllable sealed space. Subsequently, the detection module is directionally rinsed by a water tank through a nozzle, and fluid can be introduced through a swirling inlet to form a circulating enhanced displacement. The rinsing residue is discharged through a drain pipe. Finally, the nitrogen tank completes the purging and drying, thereby actively removing residues and reducing adhesion and carryover before each rotation, significantly suppressing the risk of cross-contamination, and improving the accuracy and repeatability of continuous detection. Attached Figure Description

[0021] Figure 1 is a three-dimensional schematic diagram of the overall installation structure of the device of the present invention; Figure 2 is a three-dimensional schematic diagram of the sampling mechanism structure of the device of the present invention; Figure 3 is a three-dimensional schematic diagram of the cross-sectional structure of the annular column of the device of the present invention; Figure 4 is a three-dimensional schematic diagram of the cross-sectional structure of the central column of the device of the present invention; Figure 5 is a three-dimensional schematic diagram of the cross-sectional structure of the slider and docking cylinder of the device of the present invention; Figure 6 is a three-dimensional schematic diagram of the cross-sectional structure of the circular fan section of the device of the present invention; Figure 7 is a three-dimensional schematic diagram of the cross-sectional structure of the sealing cap of the device of the present invention; Figure 8 is a three-dimensional schematic diagram of the cross-sectional structure of the cleaning chamber of the device of the present invention; In the figures: hull-10; pump group-11; detection mechanism-12; clean water tank-13; nitrogen tank-14 Support plate-15; Sampling motor-16; T-shaped plate-17; Toothed plate-18; Conduit-19; Central column-20; Circular fan segment-21; Central disc-22; Motor-23; Mounting groove-24; Slide groove-25; Electric telescopic cylinder-26; Slider-27; Docking cylinder-28; First sealing bevel-29; Piston-30; Nozzle-31; Telescopic rod-32; Detection module-33; First return spring-34; Opening-35; Ring sleeve-36; Cover-37; Second return spring-38; Guide rod-39; Second sealing bevel-40; Base plate-41; Swirl inlet-42; Sealing groove-43; Drain pipe-44. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0023] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] As shown in Figures 1-8, a high-efficiency water quality testing device for the early stage of water conservancy construction includes a hull 10, on which a power supply, a clean water tank 13, a sampling mechanism, a pump set 11, and a testing mechanism 12 are installed. The testing mechanism 12 includes a central column 20 and multiple annular segments 21 with hollow cavities. The inlet end of the pump set 11 is connected to the sampling mechanism through a pipeline, and the outlet end of the pump set 11 is connected to the inlet of the annular segments 21 through a pipeline. The multiple annular segments 21 enclose to form an annular column. A detachable mounting base plate 41 is installed at the bottom of the annular column. A central disk 22 is installed in the central cylindrical hole of the annular column, and the central disk 22 is fixedly connected to the multiple annular segments 21. The central column 20 is rotatably mounted on the top of the central disk 22. A motor 23 is installed at the bottom of the central disk 22, and a rotating shaft is installed at the output end of the motor 23. The rotating shaft rotates through the central disk 22 and is fixedly connected to the central column 20. A groove is opened on the central column 20, and a pushing mechanism is set inside the groove. A detection module 33 is set at the telescopic end of the pushing mechanism. Openable and closable sealed channels are respectively set on the inner walls of multiple annular sector segments 21. During detection, the pushing mechanism extends into the open sealed channel of the annular sector segment 21, so that the detection module 33 is located in the middle of the annular sector segment 21 to detect the water sample, thereby reflecting the true water quality of the sample. After the detection is completed, the pushing mechanism retracts and forms a cleaning chamber with the closed sealed channel to clean the residual water sample of the detection module 33 and avoid cross-contamination affecting the next detection result.

[0025] It should be noted that motor 23 is a stepper motor, which controls the rotation angle of the central column 20 to ensure accurate alignment between the central column 20 and the outer annular sector 21; this facilitates precise docking and sealing between the docking cylinder 28 and the ring sleeve 36; a PLC control system is set up to control the normal operation of the device; the PLC is existing technology and will not be described in detail here; the detection module 33 includes multiple probes for detecting various parameters in the sample water, which is existing technology and its principle will not be described in detail here; the power supply can be a storage battery to power the pump group 11, solenoid valve, electric telescopic cylinder, motor and detection mechanism, etc.

[0026] This invention uses the hull 10 as the on-site carrying platform and systematically integrates the pump unit 11, the detection mechanism 12, the clean water tank 13, and the nitrogen tank 14. By controlling the multi-cavity organization of the annular sector 21 and the switching of the central column 20, it achieves continuous collection and detection of multiple samples within the same time period, as well as the retention and recycling of polluted water. Its overall function is to significantly improve work efficiency and sample management capabilities in the fast-paced, multi-point conditions of early-stage water conservancy construction by using parallel and rotating detection of multiple samples. It also improves the representativeness of the test results by taking values ​​from the middle, and can suppress cross-sample errors by sealing, cleaning, and drying after testing, ensuring accuracy and repeatability without the need for additional equipment, thus saving costs.

[0027] It is worth noting that the testing water tank is designed as an array structure of multiple annular sector segments 21. This allows the device to collect and test multiple samples in separate compartments within the same time window. After testing, the annular sector segments 21 that meet the standards can be emptied and the next sample can be received immediately, achieving continuous turnover and high-throughput operation. Samples that do not meet the standards can be stored in the corresponding annular sector segments 21 and brought back with the ship 10 for subsequent re-inspection and research analysis, avoiding the time wasted by repeated sampling and re-arrangement. At the same time, the independent storage of multiple annular sector segments 21 makes the sample status traceable and comparable, significantly improving on-site handling efficiency and task completion rate.

[0028] Further, the groove includes an mounting groove 24 and a sliding groove 25, and the pushing mechanism includes an electric telescopic cylinder 26 and a slider 27. The mounting groove 24 and the sliding groove 25 are located on the outer circumferential surface of the central column 20, and the slider 27 is slidably mounted in the sliding groove 25. A piston cylinder is opened on the side of the slider 27 facing the annular fan segment 21, and a piston 30 is slidably disposed inside the piston cylinder. The electric telescopic cylinder 26 is fixedly disposed in the mounting groove 24, and the telescopic rod 32 of the electric telescopic cylinder 26 slides through the sliding groove 25. The telescopic rod 32 located in the sliding groove 25 slides through the slider 27 and is fixedly connected to the piston 30. A first return spring 34 is connected between the piston 30 and the bottom of the piston cylinder. The piston cylinder of 27 extends towards the annular sector 21 to form a docking cylinder 28. The telescopic rod 32 extends into the docking cylinder 28, and a detection module 33 is fixed at a certain distance from the end of the telescopic rod 32. A nozzle 31 is provided on the piston 30 panel. The docking cylinder 28 and the annular sector 21 dock to form a sealed space to complete water sample detection and self-cleaning. It should be noted that a clean water pipe (not shown in the figure) is passed through the central column 20. The clean water pipe extends through the piston cylinder of the slider 27, and the end of the clean water pipe is connected to the nozzle 31 through a hose. The clean water tank 13 is connected to the clean water pump of the pump group 11 through a pipeline, and the outlet pipe of the clean water pump is connected to the clean water pipe on the central column 20.

[0029] Furthermore, the sealing channel includes an opening 35 located on the inner wall of the annular fan segment 21, with a ring 36 sealed and fixed in the opening 35; a cover 37 is provided at the ring 36 located inside the cavity of the annular fan segment 21, and guide rods 39 are provided on both sides of the cover 37, with the two ends of the guide rods 39 respectively fixedly connected to the inner wall of the cavity of the annular fan segment 21; ear plates on both sides of the ring 36 are slidably sleeved on the guide rods 39, and a second return spring 38 is slidably sleeved on the guide rods 39, with the two ends of the second return spring 38 respectively fixedly connected to the ear plates and the inner wall of the cavity of the annular fan segment 21, maintaining the seal contact between the cover 37 and the ring 36; a discharge pipe 44 and a solenoid valve are provided at the bottom of the ring 36; it should be noted that a sealing groove 43 is provided on the cover 37, and a sealing ring is installed inside the sealing groove 43; the connecting cylinder 28 and the ring 36 are connected to the ring 36. During docking, the electric telescopic cylinder 26 drives the telescopic rod 32 to extend further. The telescopic rod 32 pushes open the cover 37, allowing the detection module 33 to extend into the middle of the water sample for detection. At this time, the piston 30 moves together with the telescopic rod 32, pulling the first return spring 34 to extend and store the elastic potential energy of contraction, driving the slider 27 to move together. After the detection is completed, the electric telescopic cylinder 26 drives the telescopic rod 32 to retract, and the telescopic rod 32 separates from the cover 37. The reset action of the second return spring 38 seals the cover 37 and the ring sleeve 36 together. At this time, the reset force of the first return spring 34 drives the slider 27 and the docking cylinder 28 to move together toward the circular sector 21, so that the docking cylinder 28 and the ring sleeve 36 are sealed together. A sealed space is formed between the piston 30, the cover 37, the ring sleeve 36 and the docking cylinder 28 for cleaning residual water sample.

[0030] It is worth noting that, in response to the problem that after the sample water is pumped into the annular sector 21 by the pump unit 11, the flow velocity gradient, boundary layer, and bottom sedimentation can easily lead to non-uniform distribution of water quality parameters, and that traditional probes are usually limited to taking values ​​in the edge area due to the proximity of the chamber wall or the opening, the center column 20 is driven by the motor 23 to achieve alignment switching, and the telescopic rod 32 is driven by the electric telescopic cylinder 26 to push the detection module 33 through the docking cylinder 28 and the ring sleeve 36 to align with the opening 35 and extend into the middle of the water body in the annular sector 21. This structurally overcomes the limitation of the probe being unable to penetrate the bulk water body. This middle detection method can not only avoid the influence of the boundary layer near the chamber wall, but also reduce the bias of the readings caused by bottom sedimentation and upper disturbance, effectively weakening the differences between the edge, bottom, and middle, thereby significantly improving the true representativeness of the detection results for the sample bulk water quality.

[0031] Furthermore, the sampling mechanism includes a support plate 15 fixedly installed on one side of the hull 10. A T-slot is provided on the support plate 15, and a T-plate 17 is slidably installed in the T-slot. A toothed plate 18 is fixed on one side of the T-plate. A sampling motor 16 is fixed on the support plate 15, and a gear is fixed at the output end of the sampling motor 16. The gear meshes with the toothed plate 18 to adjust the lifting and lowering of the T-plate 17. A conduit 19 passes through the T-plate. One end of the conduit 19 extends to the bottom end of the T-plate, and the other end of the conduit 19 is connected to the input end of the sampling pump of the pump group 11 through a hose. The output end of the sampling pump is connected to the inlet of the cavity of the annular sector 21 through a pipeline.

[0032] It should be noted that an inlet is provided at the top of the annular sector 21 cavity, and an outlet is provided at the bottom of the annular sector 21 cavity. The outlet is connected to a drainage pump. The inlet includes a sample water inlet and a clean water inlet, and the clean water inlet is connected to a clean water pump.

[0033] A scale is set on one side of the T-shaped plate, and the sampling motor 16 is a self-locking motor to ensure the stability of the water sampling depth.

[0034] Furthermore, a vortex inlet 42 is provided on the opposite side of the inner wall of the ring sleeve 36 along the tangential direction to facilitate the formation of circulation; a clear water pipe is provided inside the wall of the annular fan segment 21, one end of which extends to the clear water pump of the external pump group 11, and the other end of which is connected to the vortex inlet 42. Further, a first sealing bevel 29 is provided at the end of the docking cylinder 28, and a second sealing bevel 40 is provided at the end of the ring sleeve 36 corresponding to the first sealing bevel 29. Further still, a nitrogen tank 14 is provided on the hull 10, and a three-way valve is provided at the front end of the vortex inlet 42. The outlet of the three-way valve is connected to the vortex inlet 42, one inlet of the three-way valve is connected to the clear water pipe, and the other inlet of the three-way valve is connected to the nitrogen tank 14; solenoid valves are respectively provided at the two sets of inlets of the three-way valve.

[0035] Furthermore, the pump unit 11 integrates multiple functional pumps, including a sampling pump, a drainage pump, a clean water pump, and an air pump, which are connected to their respective locations through different pipelines, and solenoid valves are installed in the pipelines; the solenoid valves control the normal passage of the pumping path; the specific connection method is existing technology and will not be described in detail here.

[0036] It is worth noting that, in response to the problem that water from the previous sample may remain on the surface and structural gaps of the detection module 33 when rotating samples from different annular sector segments 21 or different regions, leading to cross-contamination and systemic deviations caused by the introduction of new samples after switching, a reliable sealing connection is formed between the docking cylinder 28 and the ring sleeve 36. During the retraction phase, the piston 30 cooperates with the first return spring 34, and the cap 37 cooperates with the second return spring 38, so that the docking cylinder 28, the ring sleeve 36, the cap 37, and the piston 30 form a controllable sealed space. Subsequently, the detection module 33 is directionally rinsed by the water tank 13 through the nozzle 31, and fluid can be introduced through the swirl inlet 42 to form a circulation-enhanced displacement. The rinsing residue is discharged through the drain pipe 44. Then, the nitrogen tank 14 completes the purging and drying, thereby actively removing residues and reducing adhesion and carryover before each rotation, significantly suppressing the risk of cross-contamination, and improving the accuracy and repeatability of continuous detection.

[0037] Furthermore, alignment marks are provided at the top of the central column 20 and each set of annular sector segments 21 to check the position between the docking cylinder 28 and the ring sleeve 36.

[0038] Its function is to provide an intuitive reference for the rotation switching of the central column 20 driven by the motor 23, and to quickly check and correct the alignment of the docking cylinder 28 and the ring sleeve 36, thereby avoiding the first sealing bevel 29 and the second sealing bevel 40 not sealing properly, the telescopic rod 32 being blocked from pushing, or the detection module 33 getting stuck due to the slight deviation caused by the cumulative angle error, assembly deviation or disturbance of the hull 10. Through the visual confirmation of the alignment status, the success rate and sealing reliability of each switching docking can be improved, the risk of leakage and cross-contamination caused by mis-docking can be reduced, and the efficiency and repeatability of the multi-ring sector 21 rotation detection can be improved.

[0039] A method for water quality testing using the aforementioned high-efficiency water quality testing device for the early stage of hydraulic construction includes the following steps: S1, driving the hull 10 to a predetermined position, and driving the toothed plate 18 to move the T-shaped plate 17 up and down along the support plate 15 via the sampling motor 16, so that the water intake end of the conduit 19 reaches a set depth; S2, starting the pump group 11 to extract water samples through the conduit 19 and transport them to the hollow cavity of the annular fan section 21 to form the water sample environment to be tested; S3, driving the central column 20 to rotate via the motor 23, so that the docking cylinder 28 and the inner side of the annular fan section 21 are aligned. The ring 36 at the opening 35 is aligned; then the electric telescopic cylinder 26 drives the telescopic rod 32 to extend, causing the first sealing bevel 29 at the end of the docking cylinder 28 to seal with the second sealing bevel 40 at the end of the ring 36; S4, the electric telescopic cylinder 26 drives the telescopic rod 32 to extend further, the telescopic rod 32 pushes open the cover 37 and overcomes the second return spring 38 to move the cover 37 along the guide rod 39, so that the detection module 33 extends into the middle of the circular fan section 21 through the ring 36 to detect the water sample; S5, after the detection is completed, the electric telescopic cylinder... 26. Drive the telescopic rod 32 to retract, and the cover 37 returns to its original position under the action of the second return spring 38 and makes sealing contact with the ring sleeve 36. At the same time, the piston 30 drives the docking cylinder 28 to form a sealed space with the ring sleeve 36 and the cover 37 under the action of the first return spring 34; S6. Water is supplied from the clean water tank 13 to the pump group 11 and rinsed on the detection module 33 in the sealed space through the nozzle 31. Then, fluid is introduced into the ring sleeve 36 through the vortex inlet 42 to form a circulation to enhance the replacement and cleaning effect. The rinsing liquid is discharged through the discharge pipe 44; S7. By switching the vortex... The three-way valve at the front end of inlet 42 connects the swirl inlet 42 to the nitrogen tank 14, and opens the discharge pipe 44 to blow air to dry the components in the sealed space; after S8 and S7 are completed, the next annular sector 21 is entered into the detection cycle; the annular sector 21 that meets the standard is emptied and the next sample is received immediately to achieve continuous turnover and high throughput operation; samples that do not meet the standard are kept in the corresponding annular sector 21 and brought back with the ship for subsequent re-inspection and research analysis, avoiding the time waste caused by repeated sampling and re-arrangement.

[0040] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A high-efficiency water quality testing device for the early stage of hydraulic construction, comprising a hull (10), characterized in that, The hull (10) is equipped with a power supply, a clean water tank (13), a sampling mechanism, a pump set (11), and a detection mechanism (12). The detection mechanism (12) includes a central column (20) and multiple annular segments (21) with hollow cavities. The inlet of the pump set (11) is connected to the sampling mechanism through a pipeline, and the outlet of the pump set (11) is connected to the inlet of the annular segment (21) through a pipeline. The multiple annular segments (21) enclose to form an annular column. The bottom of the annular column is detachably mounted with a mounting base plate (41). A central disc (22) is set in the central cylindrical hole of the annular column. The central disc (22) is fixedly connected to the multiple annular segments (21). The central column (20) is rotatably mounted on the top of the central disc (22), and the central column (20) is mounted on the bottom of the central disc (22). A motor (23) is installed, and a rotating shaft is installed at the output end of the motor (23). The rotating shaft rotates through the central disk (22) and is then fixedly connected to the central column (20). A groove is opened on the central column (20), and a pushing mechanism is set inside the groove. A detection module (33) is set at the telescopic end of the pushing mechanism. Openable and closable sealed channels are set on the inner walls of multiple annular fan segments (21). During detection, the pushing mechanism extends into the open sealed channel of the annular fan segment (21), so that the detection module (33) is located in the middle of the annular fan segment (21) to detect the water sample, thereby reflecting the true water quality of the sample. After the detection is completed, the pushing mechanism retreats and forms a cleaning chamber with the closed sealed channel to clean the residual water sample of the detection module (33) and avoid cross-contamination affecting the next detection result.

2. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 1, characterized in that, The groove includes an installation groove (24) and a sliding groove (25). The pushing mechanism includes an electric telescopic cylinder (26) and a slider (27). The installation groove (24) and the sliding groove (25) are located on the outer circumferential surface of the central column (20). The slider (27) is slidably installed in the sliding groove (25). A piston cylinder is opened on the side of the slider (27) facing the annular fan segment (21), and a piston (30) is slidably installed in the piston cylinder. The electric telescopic cylinder (26) is fixed in the installation groove (24), and the telescopic rod (32) of the electric telescopic cylinder (26) slides through into the sliding groove (25). The sliding groove (25) is located in the... The telescopic rod (32) slides through the slider (27) and is then fixedly connected to the piston (30). A first return spring (34) is connected between the piston (30) and the bottom of the piston cylinder. The piston cylinder opening of the slider (27) extends toward the annular fan segment (21) to form a docking cylinder (28). The telescopic rod (32) extends into the docking cylinder (28), and a detection module (33) is fixed at a certain distance from the end of the telescopic rod (32). A nozzle (31) is provided on the piston (30) panel. The docking cylinder (28) and the annular fan segment (21) dock to form a sealed space to complete water sample detection and self-cleaning.

3. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 2, characterized in that, The sealing channel includes an opening (35) on the inner wall of the annular fan segment (21), and a ring sleeve (36) is sealed and fixed in the opening (35); a cover (37) is provided at the ring sleeve (36) located inside the cavity of the annular fan segment (21), and guide rods (39) are provided on both sides of the cover (37), and the two ends of the guide rods (39) are respectively fixedly connected to the inner wall of the cavity of the annular fan segment (21); the ear plates on both sides of the ring sleeve (36) are slidably sleeved on the guide rods (39), and a second return spring (38) is slidably sleeved on the guide rods (39), and the two ends of the second return spring (38) are respectively fixedly connected to the ear plates and the inner wall of the cavity of the annular fan segment (21) to keep the cover (37) in sealed contact with the ring sleeve (36); a discharge pipe (44) and a battery valve are provided at the bottom of the ring sleeve (36).

4. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 2, characterized in that, The sampling mechanism includes a support plate (15) fixedly installed on one side of the hull (10). A T-slot is provided on the support plate (15), and a T-plate (17) is slidably installed in the T-slot. A toothed plate (18) is fixed on one side of the T-plate. A sampling motor (16) is fixed on the support plate (15), and a gear is fixed at the output end of the sampling motor (16). The gear meshes with the toothed plate (18) to adjust the lifting and lowering of the T-plate (17). A conduit (19) is passed through the T-plate. One end of the conduit (19) extends to the bottom end of the T-plate, and the other end of the conduit (19) is connected to the input end of the sampling pump of the pump group (11) through a hose. The output end of the sampling pump is connected to the inlet of the cavity of the annular sector (21) through a pipeline.

5. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 3, characterized in that, The inner wall of the ring (36) is provided with a vortex inlet (42) on the opposite side along the tangential direction to facilitate the formation of circulation; a clear water pipe is provided inside the wall of the circular fan section (21), one end of the clear water pipe extends to the clear water pump of the external pump group (11), and the other end of the clear water pipe is connected to the vortex inlet (42).

6. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 3, characterized in that, A first sealing bevel (29) is provided at the end of the connecting tube (28), and a second sealing bevel (40) is provided at the end of the ring sleeve (36) in relation to the first sealing bevel (29).

7. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 5, characterized in that, A nitrogen tank (14) is installed on the hull (10), and a three-way valve is installed at the front end of the swirl inlet (42). The outlet of the three-way valve is connected to the swirl inlet (42), the inlet of the three-way valve is connected to the clean water pipe, and the inlet of the three-way valve is connected to the nitrogen tank (14). Solenoid valves are installed at the two sets of inlets of the three-way valve respectively.

8. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 1, characterized in that, The pump set (11) integrates multiple functional pumps, including a sampling pump, a drainage pump, a clean water pump, and an air pump, which are connected to the corresponding positions through different pipelines, and solenoid valves are installed in the pipelines.

9. The high-efficiency water quality testing device for the early stage of water conservancy construction according to claim 6, characterized in that, Alignment marks are set at the top of the central column (20) and each group of annular sector segments (21) to check the position between the docking cylinder (28) and the ring sleeve (36).

10. A method for water quality testing using the high-efficiency water quality testing device for the early stage of water conservancy construction as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Drive the hull (10) to the predetermined position, and drive the toothed plate (18) to move the T-shaped plate (17) up and down along the support plate (15) through the sampling motor (16), so that the water intake end of the guide tube (19) reaches the set depth; S2. Start the pump group (11) to extract water samples through the guide tube (19) and transport them to the hollow cavity of the annular fan section (21) to form the water sample environment to be tested; S3. Drive the central column (20) to rotate through the motor (23) so that the docking cylinder (28) is aligned with the ring sleeve (36) at the inner opening (35) of the annular fan section (21); then drive the telescopic rod (32) to extend by the electric telescopic cylinder (26), so that the first sealing bevel (29) at the end of the docking cylinder (28) and the second sealing bevel (40) at the end of the ring sleeve (36) can achieve a sealing fit; S4. Drive the telescopic rod (32) to extend further by the electric telescopic cylinder (26), and the telescopic rod (32) pushes open The cap (37) is closed and overcomes the second reset spring (38) to move along the guide rod (39) so that the detection module (33) extends into the middle of the circular fan section (21) through the ring sleeve (36) to detect the water sample; S5, after the detection is completed, the electric telescopic cylinder (26) drives the telescopic rod (32) to retract, the cap (37) is reset under the action of the second reset spring (38) and seals with the ring sleeve (36), and at the same time, the piston (30) drives the docking cylinder (28) to form a sealed space with the ring sleeve (36) and the cap (37) under the action of the first reset spring (34); S6, water is supplied from the clean water tank (13) to the pump group (11) and rinsed with the detection module (33) in the sealed space through the nozzle (31), and then the fluid is introduced into the ring sleeve (36) through the vortex inlet (42) to form a circulation to enhance the replacement and cleaning effect, and the rinsing liquid is discharged through the discharge pipe (44); S7. By switching the three-way valve at the front end of the swirl inlet (42), the swirl inlet (42) is connected to the nitrogen tank (14), and the discharge pipe (44) is opened to blow air to dry the components in the sealed space; S8. Enter the next annular sector (21) detection cycle; the annular sector (21) that meets the standard is emptied and the next sample is received immediately to achieve continuous turnover and high throughput operation. Samples that do not meet the standard are kept in the corresponding annular sector (21) and brought back with the ship for re-inspection and research.

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