Whole-flow automatic sampling device for water quality detection

Abstract

The utility model provides a full-flow automatic sampling device for water quality detection. The full-flow automatic sampling device comprises a collecting barrel, a transparent measuring barrel, a collecting bottle, a sampling pump, a sedimentation ratio detection module, a water quality detection module and a PLC (Programmable Logic Controller) control module, through the preset standard sampling pump and collecting barrel, the accurate and consistent sample quantity is ensured. The transparent measuring barrel cooperates with the settlement ratio detection module to monitor and record water quality parameters and the settlement ratio in real time, and the collection bottle is used for collecting a supernatant which statically settles in the collection barrel, so that the sampling of a sewage sample is automatically completed. Meanwhile, the collecting barrel can be automatically cleaned by using supernate, so that cross contamination is effectively prevented, and the detection accuracy is improved. Due to the arrangement of the PLC control module, full-process automatic control is achieved, and it is ensured that operation is accurate and errorless. Therefore, the device not only reduces the labor burden and improves the sampling efficiency, but also realizes the real-time and accurate monitoring of the water quality change, and provides powerful technical support and data guarantee for the optimized operation of the sewage treatment plant.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage water quality detection, in particular to a full-process automatic sampling device for water quality detection. Background Art

[0002] With the acceleration of urbanization and the continuous expansion of industrial production, the discharge of domestic and industrial wastewater has increased significantly, posing a serious threat to the aquatic environment. Therefore, the establishment and operation of sewage treatment plants are particularly important. Through scientific and efficient sewage treatment processes, they effectively reduce sewage pollution to the environment and achieve the recycling of water resources. However, during the sewage treatment process, real-time monitoring and analysis of treated water samples are critical to ensuring treatment effectiveness, adjusting treatment strategies, and optimizing treatment processes.

[0003] The traditional water quality testing sampling method mainly relies on manual operation and has many shortcomings. First, manual sampling is labor-intensive, especially in large-scale sewage treatment plants, where there are many sampling points and frequent sampling operations are required. This not only increases the burden on staff, but also easily leads to sampling errors due to human factors. Secondly, manual sampling takes a long time and often fails to capture instantaneous information on water quality changes in a timely manner, thus missing the best adjustment opportunity and affecting the sewage treatment effect. In addition, there are differences in the viscosity and composition of the mixed liquid at different sampling points. If the full-process automatic sampling device is not thoroughly cleaned during the continuous sampling process, it is easy to cause cross-contamination of the mixed liquid, affecting the accuracy of the test results.

[0004] While some automated sampling devices have emerged on the market to address these challenges, most suffer from limited functionality, complex operation, and high maintenance costs, making them unable to meet the sewage treatment plant's demand for efficient, accurate, and automated water quality testing. Therefore, it is crucial to develop a fully automated sampling device that integrates collection, sedimentation ratio testing, water quality testing, and automated control. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a full-process automatic sampling device for water quality testing, which solves the problems of some sewage sampling processes in the existing technology, such as complicated processes, large errors, low efficiency, and easy contamination of sampling results.

[0006] A full-process automatic sampling device for water quality testing comprises a device shell, on which are provided a collecting barrel, a transparent measuring barrel, a collecting bottle, a sampling pump, a sedimentation ratio detection module, a water quality detection module and a PLC control module. The side of the collecting barrel is connected to the sampling pump via a pipeline, the bottom of the collecting barrel is provided with a vent valve, the middle side of the collecting barrel is connected to a connecting pipe, the connecting pipe is provided with a sedimentation ratio sampling valve and a supernatant sampling valve, the end of the sedimentation ratio sampling valve is connected to the transparent measuring barrel via a pipeline, and the end of the supernatant sampling valve is connected to the collecting bottle via a pipeline, wherein the sedimentation ratio detection module is arranged on the side of the transparent measuring barrel, the water quality detection module is arranged in the collecting bottle, and the PLC control module is connected to the sampling pump, the vent valve, the sedimentation ratio sampling valve, the supernatant sampling valve, the sedimentation ratio detection module and the water quality detection module.

[0007] Preferably, the sedimentation ratio detection module includes a light source and a camera. The light source is arranged on the side or top of the transparent measuring barrel to provide light for the transparent measuring barrel. The camera is arranged on the side of the transparent measuring barrel to take pictures of the transparent measuring barrel.

[0008] Furthermore, the illumination light source is a spotlight, which is placed on one side of the transparent measuring tube and is 10 cm to 500 cm away from the wall of the transparent measuring tube.

[0009] Furthermore, the side wall of the transparent measuring barrel is provided with a scale for marking the sampling volume.

[0010] Furthermore, the central axis of the camera lens and the horizontal plane where the scale corresponding to half of the sampling volume of the transparent measuring barrel is located are in the same plane.

[0011] Preferably, the transparent measuring barrel is a glass transparent measuring barrel.

[0012] Preferably, the collecting bucket is a transparent collecting bucket, and scale lines are provided on the transparent collecting bucket.

[0013] Preferably, the collecting bucket is provided with an overflow port.

[0014] Preferably, the water quality detection module includes a total nitrogen detector, a phosphorus detector, a COD detector, an ORP detector, an NH3-N detector and a NO3-N detector.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model provides a fully automated sampling device for water quality testing, comprising a housing equipped with a collection bucket, a transparent measuring bucket, a collection bottle, a sampling pump, a sedimentation ratio detection module, a water quality detection module, and a PLC control module. First, the collection bucket uses the sampling pump to sample and is equipped with an overflow port to ensure that the sample volume collected each time meets a preset standard, thereby ensuring accurate and consistent sample volume. Second, the transparent measuring bucket, in conjunction with the sedimentation ratio detection module, and the collection bottle, collects the supernatant from the collection bucket after settling. Together with the water quality detection module, this enables real-time monitoring and recording of the sedimentation ratio and water quality parameters. This facilitates timely understanding of water quality changes and provides reliable data for adjusting wastewater treatment strategies. Furthermore, the sampling and cleaning processes are automated, with wastewater flowing sequentially into the collection bucket, the transparent measuring bucket, and the collection bottle. After each sampling, the remaining liquid is discharged through a vent valve. Since the top of the remaining liquid is supernatant, when the vent valve discharges the remaining liquid, the supernatant can be used to clean the collection bucket, preventing cross-contamination of wastewater from various sampling points and improving the accuracy of test results. Finally, by connecting the PLC control module with the sampling pump, vent valve, sedimentation ratio sampling valve, supernatant sampling valve, sedimentation ratio detection module, and water quality detection module, we achieve automated control of the entire process, ensuring operational accuracy and consistency. Therefore, this fully automated sampling device for water quality testing not only reduces worker workload and improves sampling efficiency, but also enables real-time and accurate monitoring of water quality changes, providing strong support for the operation and management of sewage treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the full-process automatic sampling device for water quality testing according to the present invention;

[0018] Figure 2 This is a structural schematic diagram of the sedimentation ratio detection module described in the present invention.

[0019] in:

[0020] 10-device housing, 20-collecting bucket, 30-transparent measuring bucket, 40-collecting bottle, 50-sampling pump, 60-sedimentation ratio detection module, 70-water quality detection module, 21-vent valve, 22-connecting pipe, 23-sedimentation ratio sampling valve, 24-supernatant sampling valve, 25-scale, 601-light source, 602-camera. DETAILED DESCRIPTION

[0021] The embodiments described below are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] See Figure 1 as well as Figure 2 The present embodiment provides a full-process automatic sampling device for water quality detection, comprising a device housing 10, on which are provided a collecting bucket 20, a transparent measuring bucket 30, a collecting bottle 40, a sampling pump 50, a sedimentation ratio detection module 60, a water quality detection module 70 and a PLC control module. The side of the collecting bucket 20 is connected to the sampling pump 50 through a pipeline, the bottom of the collecting bucket 20 is provided with a vent valve 21, the middle side of the collecting bucket 20 is connected to a connecting pipe 22, and the connecting pipe 22 is provided with a sedimentation ratio A sampling valve 23 and a supernatant sampling valve 24, the end of the sedimentation ratio sampling valve 23 is connected to the transparent measuring barrel 30 through a pipe, and the end of the supernatant sampling valve 24 is connected to the collection bottle 40 through a pipe, wherein the sedimentation ratio detection module 60 is arranged on the side of the transparent measuring barrel 30, and the water quality detection module 70 is arranged in the collection bottle 40, and the PLC control module is connected to the sampling pump 50, the vent valve 21, the sedimentation ratio sampling valve 23, the supernatant sampling valve 24, the sedimentation ratio detection module 60 and the water quality detection module 70.

[0023] See Figure 2 Preferably, the sedimentation ratio detection module 60 includes a light source 601 and a camera 602. The light source 601 is arranged on the side or top of the transparent measuring bucket 30 to provide light for the transparent measuring bucket 30, and the camera 602 is arranged on the side of the transparent measuring bucket 30 to photograph the transparent measuring bucket 30. The light source 601 ensures that the light inside the measuring bucket is uniform and sufficient, and the light can evenly penetrate the entire measuring bucket and illuminate every corner inside it. Under the lighting conditions, the contrast between the suspended matter and the sediment in the water sample is greatly enhanced, and the stratification phenomenon becomes particularly clear and discernible. The suspended matter appears bright due to its scattering effect in the light, while the sediment is deposited at the bottom due to gravity, forming an obvious dark area. The boundary between the two is clear, which provides great convenience for subsequent observation and analysis. At the same time, the side-mounted camera 602 has high resolution and wide-angle vision, which can capture the dynamic changes of the water sample inside the measuring bucket in all directions and without blind spots. Over time, camera 602 captures and records in real time the gradual settling of suspended matter and the formation of layers, as well as changes in parameters such as water sample color and transparency. These dynamic images intuitively demonstrate the changing trends in water quality. The PLC control module receives the data collected by camera 602 and can then derive sedimentation ratio data. It should be noted that the PLC control module in this application is a PLC processor.

[0024] Preferably, the illumination light source 601 in this embodiment is a spotlight, which is placed on one side of the transparent measuring tube and 10 cm to 500 cm away from the wall of the transparent measuring tube. The spotlight provides stable and sufficient illumination for the interior of the transparent measuring tube with its high brightness, low power consumption, and long life.

[0025] Preferably, the side wall of the transparent measuring bucket 30 described in the present embodiment is provided with a scale 25 identifying the sampling volume. Further, the central axis of the lens of the camera 602 is in the same plane as the horizontal plane where the scale 25 corresponding to one-half of the sampling volume of the transparent measuring bucket 30 is located. In this application, the camera 602 lens can capture the overall form of the water sample and its subtle changes with the best viewing angle. Whether it is the distribution of suspended matter, the accumulation of sediment, or the gradual change of the water sample color and transparency, all can be clearly and completely presented under the record of the camera 602, which not only improves the measurement accuracy of parameters such as sedimentation ratio, but also provides more abundant and detailed information for water quality analysis.

[0026] Preferably, the transparent measuring barrel 30 is a glass transparent measuring barrel 30, so that the water sample and its changing process inside the measuring barrel are clearly visible. Preferably, the collecting barrel 20 is a transparent collecting barrel 20, and the transparent collecting barrel 20 is provided with scale lines, so that the settling status inside the collecting barrel 20 can be observed in real time. After the settling is completed, the supernatant above can be collected into the collection bottle 40.

[0027] Preferably, the collection barrel 20 is provided with an overflow port to ensure that the amount of water in the collection barrel 20 can be maintained within the same range.

[0028] Preferably, the water quality detection module 70 includes a total nitrogen detector, an orthophosphorus detector, a COD detector, an ORP detector, an NH3-N detector and a NO3-N detector. The module covers the detection of multiple key water quality indicators such as total nitrogen (TN), orthophosphorus (PO4-P), chemical oxygen demand (COD), oxidation-reduction potential (ORP), ammonia nitrogen (NH3-N) and nitrate nitrogen (NO3-N). These indicators can comprehensively reflect key information such as the pollution status, nutrient content, organic matter load and oxidation-reduction state of the water body, and provide a scientific basis for water quality assessment, pollution control and water resource management. The water quality detection module 70 is connected to the PLC control module, and these data can be intuitively viewed through the display screen matched with the PLC control module.

[0029] Preferably, an ultrasonic cleaning component is provided in the transparent measuring barrel 30 so that the transparent measuring barrel 30 can be cleaned better.

[0030] It should be noted that when the full-process automatic sampling device for water quality testing is used, the sampling pump 50 is started and the vent valve 21 of the collection barrel 20 is opened simultaneously. First, the collection barrel 20 is thoroughly rinsed to ensure that there are no impurities remaining in the barrel. After the rinsing process is completed, the vent valve 21 is quickly closed. At this time, the liquid level of the collection barrel 20 rises steadily as the water sample continues to flow in until it reaches the preset overflow port height, thereby ensuring that the sample amount collected at the subsequent sampling point is both quantitative and accurate. Subsequently, the PLC control module controls the sedimentation ratio sampling valve 23 to open for a preset time, so that the water sample in the collection barrel 20 flows smoothly into the transparent measuring barrel 30. After that, the sampling pump 50 is immediately closed, and the water sample is allowed to settle in the collection barrel 20 for 30 minutes, laying a solid foundation for the subsequent collection of the supernatant sample of the full process. At the same time, the sedimentation ratio detection module 60 monitors the sedimentation process of the sample in the transparent measuring cylinder, records and reads the sedimentation ratio data in real time, and then transmits it to the PLC control module for easy manual acquisition and analysis. After the sample has finished settling, the PLC control module starts opening the supernatant sampling valve 24 and introduces the supernatant sample into the collection bottle 40. Then, the water quality detection module 70 integrated in the collection bottle 40 performs a full range of water quality testing on the sample. After the supernatant sample is collected, the drain valve 21 is opened again, and the remaining sample in the collection barrel 20 is discharged smoothly, and then the drain valve 21 is closed. Since the supernatant that remains on the top of the collection barrel is the settled supernatant, its relatively clean nature makes this part of the liquid an ideal choice for flushing the barrel body. Finally, after the sample in the collection barrel is completely emptied, all related equipment is turned off, and the entire operation process is completed. The full-process automatic sampling device for water quality testing can be taken to the next sampling point for sampling.

[0031] The present invention provides a fully automated sampling device for water quality testing, comprising a housing 10 equipped with a collection bucket 20, a transparent measuring bucket 30, a collection bottle 40, a sampling pump 50, a sedimentation ratio detection module 60, a water quality detection module 70, and a PLC control module. First, the collection bucket 20 uses the sampling pump 50 to sample and is equipped with an overflow port to ensure that the sample volume collected each time meets a preset standard, thereby ensuring accurate and consistent sample volume. Second, the transparent measuring bucket 30, in conjunction with the sedimentation ratio detection module 60 and the collection bottle 40, collects the supernatant after the collection bucket 20 settles. Together with the water quality detection module 70, this enables real-time monitoring and recording of sedimentation ratios and water quality parameters. This facilitates timely understanding of water quality changes and provides reliable data for adjusting wastewater treatment strategies. Furthermore, the sampling and cleaning processes are automated, with wastewater flowing sequentially into the collection bucket 20, the transparent measuring bucket 30, and the collection bottle 40. After each sampling, the remaining liquid is discharged through the vent valve 21. Since the top of the residual liquid is the supernatant, when the vent valve 21 discharges the residual liquid, the supernatant can clean the collection bucket 20, preventing cross-contamination of sewage at each sampling point and improving the accuracy of the test results. Finally, through the connection of the PLC control module with the sampling pump 50, the vent valve 21, the sedimentation ratio sampling valve 23, the supernatant sampling valve 24, the sedimentation ratio detection module 60 and the water quality detection module 70, the full-process automatic control is realized, ensuring the accuracy and consistency of the operation. Therefore, the full-process automatic sampling device for water quality detection realizes full-process automatic sampling and detection, which not only reduces the labor intensity of the staff and improves the sampling efficiency, but also can monitor water quality changes in real time and accurately, providing strong support for the operation and management of the sewage treatment plant.

[0032] It is also possible that the water quality detection module 70 described in the present application includes a sampling component, and the sampling component samples the supernatant sample and then performs manual testing, and the manual testing includes the following tests: Total nitrogen detection: using alkaline potassium persulfate digestion ultraviolet spectrophotometry. First, the sample sampled by the sampling component is added to a reagent containing alkaline potassium persulfate, and digested under high temperature conditions to convert organic nitrogen into ammonia nitrogen and oxidize inorganic nitrogen into nitrate. Subsequently, the absorption characteristics of ultraviolet light are used to measure the concentrations of ammonia nitrogen and nitrate in the solution to calculate the total nitrogen content. Total phosphorus detection: using ammonium molybdate spectrophotometry. The sample first reacts with the ammonium molybdate reagent to form a yellow complex, and then its absorbance is measured by a spectrophotometer, and the total phosphorus concentration is calculated according to the standard curve. Determination of COD chemical oxygen demand: using rapid digestion spectrophotometry. First, the sample is reacted with an oxidant (such as high concentration sodium persulfate) to rapidly oxidize organic matter under high temperature conditions to produce colored compounds. The sample's absorbance is then measured using a spectrophotometer, and the COD value is calculated by comparing it with a standard solution. Ammonia nitrogen detection: Nessler's reagent spectrophotometry is used. Ammonia nitrogen in the sample reacts with Nessler's reagent under alkaline conditions to form a yellow complex. The absorbance is then measured using a spectrophotometer, and the ammonia nitrogen concentration is calculated based on the standard curve. Therefore, this manual detection method can comprehensively reflect the concentration of key pollutants in the supernatant sample, effectively assessing the pollution status of the water body and enabling subsequent treatment.

[0033] The above disclosures are merely some preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A full-process automatic sampling device for water quality testing, comprising a device housing, characterized in that: A collecting barrel, a transparent measuring barrel, a collecting bottle, a sampling pump, a sedimentation ratio detection module, a water quality detection module and a PLC control module are provided on the shell of the device. The side of the collecting barrel is connected to the sampling pump through a pipeline, and a vent valve is provided at the bottom of the collecting barrel. A connecting pipe is connected to the middle side of the collecting barrel. A sedimentation ratio sampling valve and a supernatant sampling valve are provided on the connecting pipe. The end of the sedimentation ratio sampling valve is connected to the transparent measuring barrel through a pipeline, and the end of the supernatant sampling valve is connected to the collecting bottle through a pipeline. The sedimentation ratio detection module is arranged on the side of the transparent measuring barrel, the water quality detection module is arranged in the collecting bottle, and the PLC control module is connected to the sampling pump, the vent valve, the sedimentation ratio sampling valve, the supernatant sampling valve, the sedimentation ratio detection module and the water quality detection module.

2. The full-process automatic sampling device for water quality testing according to claim 1, characterized in that: The sedimentation ratio detection module includes a light source and a camera. The light source is arranged on the side or top of the transparent measuring barrel to provide light for the transparent measuring barrel. The camera is arranged on the side of the transparent measuring barrel to take pictures of the transparent measuring barrel.

3. The full-process automatic sampling device for water quality testing according to claim 2, characterized in that: The illumination light source is a spotlight, and the spotlight is placed on one side of the transparent measuring barrel.

4. The full-process automatic sampling device for water quality testing according to claim 2, characterized in that: The side wall of the transparent measuring barrel is provided with a scale for marking the sampling volume.

5. The full-process automatic sampling device for water quality testing according to claim 4, characterized in that: The central axis of the camera lens and the horizontal plane where the scale corresponding to half of the sampling volume of the transparent measuring barrel is located are in the same plane.

6. The full-process automatic sampling device for water quality testing according to claim 1, characterized in that: The transparent measuring barrel is a glass transparent measuring barrel.

7. The full-process automatic sampling device for water quality testing according to claim 1, characterized in that: The collecting bucket is a transparent collecting bucket, and scale lines are provided on the transparent collecting bucket.

8. The full-process automatic sampling device for water quality testing according to claim 1, characterized in that: The collecting bucket is provided with an overflow port.

9. The full-process automatic sampling device for water quality testing according to claim 1, characterized in that: The water quality detection module includes a total nitrogen detector, a phosphorus detector, a COD detector, an ORP detector, an NH3-N detector and a NO3-N detector.

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