Sewage sampling device for water conservancy survey

Abstract

The invention belongs to the technical field of water pollution detection, particularly relates to a sewage sampling device for water conservancy survey, and provides the following scheme aiming at the problems that an existing sewage sampling device is easy to block, a sample is polluted and sludge flows back: the sewage sampling device comprises a sampling device body; the sampling mechanism is arranged at the top of the sampling equipment body and is used for sampling sewage; the height adjusting device is arranged on the sampling mechanism and is used for adjusting the height of the sampling mechanism; the sewage sampling device for water conservancy survey has the advantages that by integrating the functions of precise height adjustment, anti-blocking cleaning, sample protection, multi-module cooperation, batch sampling and the like, the defects of low adjustment precision, easiness in blockage, sample pollution, sludge backflow, poor collaboration, low switching efficiency and the like in the prior art are effectively overcome, and the sewage sampling device for water conservancy survey is efficient, stable, precise, reliable and convenient to maintain; and a powerful guarantee is provided for smooth development of water conservancy survey work.

Description

Technical Field

[0001] This application relates to the field of water pollution detection technology, and in particular to a wastewater sampling device for water conservancy surveying. Background Technology

[0002] Wastewater sampling is a core component of water conservancy surveying. By collecting and analyzing wastewater samples, key data such as the degree of water pollution and the types of pollutants can be accurately obtained, providing a scientific basis for water resource protection and pollution control solutions. Wastewater sampling devices used in water conservancy surveys must possess characteristics such as accurate sampling, adaptability to different water depths, uncontaminated samples, and easy cleaning and maintenance to ensure the authenticity and reliability of the sampling data.

[0003] For example, Chinese invention patent CN222105147U discloses a wastewater sampling device for water conservancy engineering surveys, including a water storage tank, a sealing cap, an air extraction pipe, an air pump, an air inflator pipe, and a water intake pipe. During use, controlling the air pump allows gas to continuously enter the water intake pipe through the air inflator pipe and the water storage tank. This prevents wastewater from entering the wastewater pipe when the water intake pipe is inserted into the wastewater, or when adjusting the insertion depth of the water intake pipe. Controlling the air pump creates a negative pressure state in the water storage tank and the water intake pipe through the air extraction pipe. This allows wastewater to enter the water storage tank through the water intake pipe, completing the wastewater sampling. When sampling wastewater at different depths in the same water area, simply replace the water storage tank and adjust the insertion depth of the water intake pipe. The operation is simple and facilitates continuous sampling of wastewater at different depths in the same water area.

[0004] Currently, existing wastewater sampling devices used in water conservancy surveys generally have the following defects: Firstly, the sampling mechanism is prone to clogging. Sludge and other impurities in the sewage easily adhere to the sampling channel and filter components. The lack of an efficient cleaning and anti-clogging mechanism will reduce sampling efficiency in the long run. Secondly, the samples are easily contaminated. After sampling, the wastewater remaining on the inner wall of the sampling device will mix with subsequent samples, and there is a lack of effective rinsing and filtration and disinfection mechanisms for the rinsing water, which leads to the distortion of sample data. Third, incomplete sludge treatment can lead to the sludge being returned to the sampling mechanism, causing blockages or contamination again and affecting the normal operation of the equipment. There is an urgent need for a wastewater sampling device for water conservancy surveys that can prevent clogging and cleaning, protect samples, efficiently treat sludge, and coordinate multiple modules to address the above-mentioned deficiencies. Summary of the Invention

[0005] In order to improve the problems of easy clogging, sample contamination and sludge backflow of existing sewage sampling devices, this application provides a sewage sampling device for water conservancy survey.

[0006] The wastewater sampling device for water conservancy surveying provided in this application adopts the following technical solution: A wastewater sampling device for water conservancy surveying includes: a sampling device body; The sampling mechanism, located on top of the sampling equipment body, is used for sewage sampling. A height adjustment device is installed on the sampling mechanism and is used to adjust the height of the sampling mechanism. The first filtration device, located to the left of the height adjustment device, is used to filter the backwash water. There are two rinsing devices, both of which are located on the sampling mechanism and are used to rinse the sampling mechanism. A nitrogen replenishment device is located at the rear of the sampling mechanism and is used to fill the sampling mechanism with nitrogen. The second filtration device is located at the bottom of the sampling mechanism to prevent sludge from clogging the sampling mechanism. There are two cleaning devices, each located at the bottom of the rinsing device, used to clean the second filter device. Two sludge transfer devices are provided, each located in front of one of the two cleaning devices. They are used to transfer the cleaned sludge to prevent the sludge from flowing back and contaminating the second filtration device. The rotating device, located inside the sampling equipment body, is used to drive multiple reagent bottles to rotate in conjunction with the sampling operation; The sampling mechanism includes a first fixed frame and a sampling inner liner. The first fixed frame is connected to the top inner wall of the sampling device body. A first protective sleeve is connected to the through hole of the first fixed frame. A second protective sleeve is slidably connected to the inner wall of the first protective sleeve. A first three-way pipe is connected to the center through hole of the first protective sleeve. A second inlet check valve is installed at the bottom outlet of the first three-way pipe. A sewage suction component is installed at the outlet of the second inlet check valve. An outlet nozzle is installed at the outlet of the sewage suction component. The outlet nozzle is fixedly connected to the mounting groove of the first fixed frame. A water pipe is sleeved inside the second and first protective sleeves. The two ends of the water pipe are fixedly connected to the inlet of the first three-way pipe and the outlet of the sampling inner liner, respectively. A sampling shell is sleeved around the sampling inner liner. A two-position two-way solenoid valve is installed at the inlet of the sampling inner liner. A liquid-gas separation pressure relief valve is installed at the outlet of the first three-way pipe. A third outlet check valve is installed at each of the multiple outlet holes of the sampling inner liner. The height adjustment device includes a first rotating motor and a guide rod. The first rotating motor is installed on the top inner wall of the sampling device body. The output shaft of the first rotating motor is fixedly connected to a second bevel gear. The left side of the second bevel gear meshes with the first bevel gear. The bottom of the second bevel gear is fixedly connected to a screw. The bottom end of the screw is threadedly connected to a connecting rod. The top of the sampling device body is connected to a connecting frame. The bottom of the connecting frame is connected to a sliding sleeve. The sliding sleeve is slidably connected to the connecting rod. The bottom end of the connecting rod is fixedly connected to the top end of the sampling housing. The two ends of the guide rod are fixedly connected to the top end of the sampling housing and the bottom end of the connecting frame, respectively. The first filtration device includes a spiral sterilizing glass tube, a filter tank, and a synchronous toothed belt. A first rotating shaft is fixedly connected to the left side of the first bevel gear, and a synchronous toothed belt pulley is fixedly connected to the left end of the first rotating shaft. The synchronous toothed belt pulley is connected to another synchronous toothed belt pulley via a synchronous toothed belt drive. The first rotating shaft is rotatably mounted on the left through hole of the connecting frame. A first inlet check valve is installed in the filter tank mounting hole. A rotating connector is rotatably provided at the outlet port of the first inlet check valve. A filter sleeve is connected to the right side of the rotating connector, and another rotating connector is connected to the right side of the filter sleeve. A dust collection frame is connected to the inner wall of the left end of the filter tank. The dust collection frame is rotatably connected to the other rotating connector. The guide tube of the dust collection frame extends out of the filter tank, and a waste container is installed at the bottom of the guide tube of the dust collection frame. The sludge pump has a pull-out ash collection box connected to the front side of the first fixed frame. The inlet of the pull-out ash collection box is fixedly connected to the outlet of the sludge pump. A second circular rack is fitted around the filter sleeve. Multiple second gears mesh around the second circular rack. The left side of the second gear at the top is fixedly connected to the left side of the synchronous toothed pulley at the bottom. A first one-way valve is installed at the bottom outlet of the filter tank. An ultraviolet disinfection module is installed on the left side of the first fixed frame. A water pump is installed on the right side of the ultraviolet disinfection module. A second three-way pipe is installed at the outlet of the water pump. A second one-way valve is installed at both outlets of the second three-way pipe. The two ends of the spiral disinfection glass tube are fixedly connected to the outlet of the first one-way valve and the inlet of the water pump, respectively. The flushing device on the left includes a nozzle, which is installed on the mounting hole of the sampling housing. A hose connects the output port of the second water outlet check valve to the input port of the nozzle. A second fixed frame is fixedly connected to the inner wall of the sampling housing. A second rotating shaft is rotatably provided at the center point of the second fixed frame. A conversion fan blade is connected to the top of the second rotating shaft. Two nozzles are aligned with the blades of the two conversion fan blades. A protective shell is fixedly connected to the left side of the sampling inner tank. The second rotating shaft passes through the top through hole of the protective shell. The two flushing devices are symmetrically distributed with the longitudinal central axis of the sampling inner tank as the center. The nitrogen replenishment device includes a nitrogen replenishment component, which is installed on the rear inner wall of the first fixed frame. An output pump is installed at the output port of the nitrogen replenishment component, and an intake check valve is installed at the inlet of the first three-way pipe. A hose connects the output port of the output pump to the input port of the intake check valve. The second filtration device includes a liner, multiple return springs, multiple guide sleeves, and a filter plate. The inner wall of the sampling liner is fixedly connected to the liner. The multiple return springs are respectively located inside the multiple guide sleeves. The two ends of the multiple return springs and the multiple guide sleeves are fixedly connected to the bottom of the liner and the top of the filter plate, respectively. The cleaning device on the left includes a third bevel gear, a second rotating shaft fixedly connected to the third bevel gear, a fifth bevel gear meshing with the right side of the third bevel gear, a third rotating shaft fixedly connected to the right side of the fifth bevel gear, a cam fixedly connected to the right side of the third rotating shaft, the cam abutting against the top of the filter plate, a sixth bevel gear meshing with the bottom of the fifth bevel gear, a scraper fixedly connected to the bottom of the sixth bevel gear, and the bristles of the scraper abutting against the bottom of the filter plate. The two cleaning devices are symmetrically distributed with the longitudinal central axis of the sampling inner liner as the center. The sludge transfer device on the left includes a dust collection hood, an extension plate of which is connected to the front side of the sampling housing. A fourth bevel gear meshes with the front side of the third bevel gear. A fourth rotating shaft is fixedly connected to the front side of the fourth bevel gear. A third gear is fixedly connected to the front side of the fourth rotating shaft. A fourth gear meshes with the right side of the third gear. A transfer screw is fixedly connected to the front side of the fourth gear. A discharge check valve is installed at the discharge port of the dust collection hood. The extension shaft of the transfer screw passes through the housing of the discharge check valve. A guide cylinder is connected to the discharge port of the discharge check valve. The two sludge transfer devices are symmetrically distributed with the longitudinal central axis of the sampling inner tank as the center. The rotating device includes a support frame, which is fixedly connected to the inner wall of the sampling device body. A rotating box is rotatably mounted in the interlayer of the support frame. A first circular rack is sleeved around the extension plate of the rotating box. A first gear is mounted on the front side of the first circular rack. A second rotating motor is mounted on the top of the support frame. The output shaft of the second rotating motor is connected to the first gear. A sealing cover is snapped onto the rotating box. Multiple sensing plates are fixedly connected to the top of the sealing cover. A sensing component is mounted on the front side of the first fixed frame. Any one of the multiple sensing plates senses the sensing head of the sensing component.

[0007] In summary, this application includes at least one of the following beneficial technical effects: 1. Integrated anti-clogging and cleaning system ensures smooth sampling. The second filtration device pre-filters large particles of sludge in the wastewater to prevent clogging of the sampling channel; the cleaning device efficiently cleans the sludge on the filter plate through the dual action of cam pushing and scraping; the sludge transfer device promptly discharges the cleaned sludge to avoid backflow contamination, forming an anti-clogging closed loop of "filtration, cleaning, and transfer"; in conjunction with the rinsing device, the sampling mechanism is thoroughly rinsed, and the nitrogen replenishment device dries residual moisture to prevent cross-contamination of samples.

[0008] 2. Sample contamination prevention and control to ensure data accuracy. The rinsing device uses high-pressure spray combined with fan blade rotation to achieve thorough rinsing of the inner wall of the sampling mechanism; the first filtration device filters and disinfects the backwash water before recycling it, which is both energy-saving and environmentally friendly, and prevents the rinsing water from carrying impurities and contaminating the sampling mechanism; the nitrogen replenishment device fills the gas with nitrogen to dry the residual moisture, further eliminating cross-contamination of samples; the extensive use of one-way valves ensures unidirectional flow of water and materials, avoiding backflow contamination.

[0009] This invention effectively overcomes the shortcomings of existing technologies, such as low adjustment accuracy, easy clogging, sample protection, multi-module collaboration, and batch sampling, by integrating functions such as precise height adjustment, anti-clogging cleaning, sample protection, multi-module collaboration, and batch sampling. It provides a high-efficiency, stable, accurate, reliable, and easy-to-maintain wastewater sampling device for water conservancy surveys, providing strong support for the smooth progress of water conservancy survey work. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the internal structure in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the connection structure of the fixed frame, sampling mechanism, height adjustment device, first filter device, flushing device, nitrogen replenishment device, second filter device, cleaning device, sludge transfer device and rotating device in Embodiment 1 of this application. Figure 4 This is a schematic diagram of the connection structure of the sampling mechanism, height adjustment device, first filter device, flushing device, nitrogen replenishment device, second filter device, cleaning device, sludge transfer device and rotating device in Embodiment 1 of this application; Figure 5 This is a schematic diagram of the rotating device structure in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the sampling mechanism, height adjustment device, first filter device, rinsing device, second filter device, cleaning device, and sludge transfer device in Embodiment 1 of this application. Figure 7 This is a schematic diagram of the structure of the first filtration device in Embodiment 1 of this application; Figure 8 This is a schematic diagram of the internal structure of the first filter device in Embodiment 1 of this application; Figure 9 This is a schematic diagram of the connection (internal) structure between the sampling mechanism and the height adjustment device in Embodiment 1 of this application; Figure 10 This is a schematic diagram of the sampling mechanism structure in Embodiment 1 of this application; Figure 11 This is a schematic diagram of the internal structure of the sampling mechanism in Embodiment 1 of this application; Figure 12 This is a schematic diagram of the connection structure of the second filtration device, cleaning device, and sludge conveying device in Embodiment 1 of this application; Figure 13 This is a schematic diagram of the connection structure between the cleaning device and the sludge conveying device in Embodiment 1 of this application; Figure 14 This is a schematic diagram of the sludge transfer device in Embodiment 1 of this application; Figure 15 This is a schematic diagram of the structure of the second filtration device in Embodiment 1 of this application.

[0011] Reference numerals: 1. Sampling device body; 2. Support frame; 3. Output pump; 4. First fixed frame; 5. Nitrogen replenishment assembly; 6. Rotating box; 7. Sealing cover; 8. Discharge nozzle; 9. Sensing assembly; 10. Synchronous toothed belt; 11. Synchronous toothed belt pulley; 12. Filter canister; 13. Ultraviolet disinfection module; 14. Pull-out dust collection box; 15. First rotating shaft; 16. First bevel gear; 17. First rotating motor; 18. Second bevel gear; 19. Sensing... 20. First circular rack; 21. Second rotating motor; 22. First gear; 23. Sewage suction assembly; 24. Guide rod; 25. First protective sleeve; 26. Second protective sleeve; 27. Sampling housing; 28. Second gear; 29. ​​Second circular rack; 30. Rotary connector; 31. First inlet check valve; 32. Filter sleeve; 33. First outlet check valve; 34. Spiral disinfection glass tube; 35. Ash collection frame; 36. Sewage... 37. Mud pump; 38. Second outlet check valve; 39. Sliding sleeve; 40. Connecting rod; 41. Liquid-gas separation pressure relief valve; 42. Second inlet check valve; 43. First three-way pipe; 44. Ash collection hood; 45. Discharge check valve; 46. Guide cylinder; 47. Air inlet check valve; 48. Water pipe; 49. Nozzle; 50. Third outlet check valve; 51. Protective shell; 52. Two-position two-way solenoid valve; 53. Sampling inner tank; 54. Second fixing frame; 55. Conversion 55. Fan blade; 56. Second shaft; 57. Third bevel gear; 58. Fourth bevel gear; 59. Fifth bevel gear; 60. Third shaft; 61. Cam; 62. Sixth bevel gear; 63. Scraper; 64. Fourth shaft; 65. Fourth gear; 66. Third gear; 67. Transmission screw; 68. Return spring; 69. Liner; 70. Guide sleeve; 71. Filter plate; 72. Screw; 73. Connecting frame; 74. Water pump; 75. Second tee pipe. Detailed Implementation

[0012] Example 1: The following is in conjunction with the appendix Figures 1-15 The first embodiment of this application will be described in further detail.

[0013] A wastewater sampling device for water conservancy surveying includes: Sampling device body 1; The sampling mechanism is located on the top of the sampling equipment body 1 and is used for sewage sampling. A height adjustment device is installed on the sampling mechanism and is used to adjust the height of the sampling mechanism. The first filtration device, located to the left of the height adjustment device, is used to filter the backwash water. There are two rinsing devices, both of which are located on the sampling mechanism and are used to rinse the sampling mechanism. A nitrogen replenishment device is located at the rear of the sampling mechanism and is used to fill the sampling mechanism with nitrogen. The second filtration device is located at the bottom of the sampling mechanism to prevent sludge from clogging the sampling mechanism. There are two cleaning devices, each located at the bottom of the rinsing device, used to clean the second filter device. Two sludge transfer devices are provided, each located in front of one of the two cleaning devices. They are used to transfer the cleaned sludge to prevent the sludge from flowing back and contaminating the second filtration device. The rotating device, located inside the sampling equipment body, is used to drive multiple reagent bottles to rotate in conjunction with the sampling operation; In this embodiment, the sampling mechanism includes a first fixed frame 4 and a sampling inner liner 52. The first fixed frame 4 is connected to the top inner wall of the sampling device body 1. A first protective sleeve 25 is connected to the through hole of the first fixed frame 4. A second protective sleeve 26 is slidably connected to the inner wall of the first protective sleeve 25. A first tee pipe 42 is connected to the center through hole of the first protective sleeve 25. A second inlet check valve 41 is installed at the bottom outlet of the first tee pipe 42. A sewage suction assembly 23 is installed at the outlet of the second inlet check valve 41. A sewage suction assembly 23 is installed at the outlet of the sewage suction assembly 23. The outlet nozzle 8 is fixedly connected to the mounting groove of the first fixed frame 4, and the second protective sleeve 26 and the first protective sleeve 25 are fitted with a water pipe 47. The two ends of the water pipe 47 are fixedly connected to the inlet of the first three-way pipe 42 and the outlet of the sampling inner tank 52, respectively. The outer periphery of the sampling inner tank 52 is fitted with a sampling shell 27. The inlet of the sampling inner tank 52 is equipped with a two-position two-way solenoid valve 51. The outlet of the first three-way pipe 42 is equipped with a liquid-gas separation pressure relief valve 40. The multiple outlet holes of the sampling inner tank 52 are all equipped with a third outlet one-way valve 49. Specifically, the wastewater suction assembly 23 adopts a self-priming pump structure to provide power for wastewater sampling. When the two-position two-way solenoid valve 51 is opened, the wastewater suction assembly 23 is started. Wastewater enters through the inlet of the sampling inner tank 52, is transported to the first three-way pipe 42 through the third outlet one-way valve 49 and the water pipe 47, and then discharged from the outlet nozzle 8 through the second inlet one-way valve 41 and the wastewater suction assembly 23, falling precisely into the reagent bottle below to complete the sampling. The liquid-gas separation pressure relief valve 40 balances the internal air pressure of the sampling inner tank 52 in real time to ensure smooth sampling. After the sampling is completed, the two-position two-way solenoid valve 51 and the wastewater suction assembly 23 are closed.

[0014] In this embodiment, the height adjustment device includes a first rotating motor 17 and a guide rod 24. The first rotating motor 17 is installed on the top inner wall of the sampling device body 1. The output shaft of the first rotating motor 17 is fixedly connected to a second bevel gear 18. The left side of the second bevel gear 18 is meshed with a first bevel gear 16. The bottom of the second bevel gear 18 is fixedly connected to a screw 71. The bottom end of the screw 71 is threadedly connected to a connecting rod 39. The top of the sampling device body 1 is connected to a connecting frame 72. The bottom of the connecting frame 72 is connected to a sliding sleeve 38. The sliding sleeve 38 is slidably connected to the connecting rod 39. The bottom end of the connecting rod 39 is fixedly connected to the top end of the sampling housing 27. The two ends of the guide rod 24 are fixedly connected to the top end of the sampling housing 27 and the bottom end of the connecting frame 72, respectively. Specifically, the first rotating motor 17 is started, driving the second bevel gear 18 to rotate. The second bevel gear 18 meshes with and drives the first bevel gear 16 to rotate, simultaneously driving the bottom screw 71 to rotate. The screw 71 is threadedly engaged with the connecting rod 39, driving the connecting rod 39 to slide up and down along the sliding sleeve 38, thereby driving the sampling housing 27 and the internal sampling liner 52 to rise and fall synchronously. The guide rod 24 restricts the rotation of the sampling housing 27 to ensure a smooth lifting process. By controlling the forward and reverse rotation and speed of the first rotating motor 17, the height of the sampling mechanism can be precisely adjusted to adapt to the sampling needs of different water depths.

[0015] In this embodiment, the first filtration device includes a spiral sterilization glass tube 34, a filter tank 12, and a synchronous toothed belt 10. A first rotating shaft 15 is fixedly connected to the left side of the first bevel gear 16, and a synchronous toothed pulley 11 is fixedly connected to the left end of the first rotating shaft 15. The synchronous toothed pulley 11 is connected to another synchronous toothed pulley 11 via the synchronous toothed belt 10. The first rotating shaft 15 is rotatably mounted on the left through hole of the connecting frame 72. A first inlet check valve 31 is installed in the mounting hole of the filter tank 12. A rotating connector 30 is rotatably provided at the outlet of the first inlet check valve 31. A filter sleeve 32 is connected to the right side of the rotating connector 30, and another rotating connector 30 is connected to the right side of the filter sleeve 32. A dust collection frame 35 is connected to the inner wall of the left end of the filter tank 12. The dust collection frame 35 is rotatably connected to the other rotating connector 30. The guide tube of the dust collection frame 35 extends out of the filter tank 12, and the guide tube of the dust collection frame 35... A sludge pump 36 is installed at the bottom of the pipe. A pull-out ash collection box 14 is connected to the front side of the first fixed frame 4. The inlet of the pull-out ash collection box 14 is fixedly connected to the outlet of the sludge pump 36. A second circular rack 29 is fitted around the filter sleeve 32. Multiple second gears 28 mesh around the second circular rack 29. The left side of the second gear 28 at the top is fixedly connected to the left side of the synchronous toothed pulley 11 at the bottom. A first outlet check valve 33 is installed at the bottom outlet of the filter tank 12. An ultraviolet disinfection module 13 is installed on the left side of the first fixed frame 4. A water pump 73 is installed on the right side of the ultraviolet disinfection module 13. A second three-way pipe 74 is installed at the outlet of the water pump 73. A second outlet check valve 37 is installed at both outlets of the second three-way pipe 74. The two ends of the spiral disinfection glass tube 34 are fixedly connected to the outlet of the first outlet check valve 33 and the inlet of the water pump 73, respectively. Specifically, the rotating connector 30 uses a sealed rotary joint to ensure sewage transport without affecting the rotation of the filter sleeve 32; the filter sleeve 32 is connected to the right side of the rotating connector 30 via a flange, and the filter sleeve 32 is made of stainless steel filter screen material to achieve the separation of sewage and impurities; the rotation of the first bevel gear 16 drives the first rotating shaft 15 to rotate, and through the cooperation of the synchronous toothed pulley 11 and the synchronous toothed belt 10, it drives the second gear 28 at the top to rotate; the second gear 28 meshes and drives the second circular rack 29 to rotate, thereby driving the filter sleeve 32 to rotate; external tap water flows through... The first inlet check valve 31 and the rotating connector 30 enter the filter sleeve 32. During the rotation, tap water passes through the filter screen and enters the filter tank 12. A small amount of impurities in the water are intercepted in the filter sleeve 32 and fall into the ash collection frame 35. The sludge pump 36 is started to extract the impurities and sludge in the ash collection frame 35 to the pull-out ash collection box 14. The filtered clean water enters the spiral disinfection glass tube 34 through the first outlet check valve 33. After being disinfected by the ultraviolet disinfection module 13, it is pumped by the water pump 73 to the second three-way pipe 74, and then transported to the flushing device through the second outlet check valve 37.

[0016] In this embodiment, the rinsing device on the left includes a nozzle 48, which is installed on the mounting hole of the sampling housing 27. The output port of the second water outlet check valve 37 is connected to the input port of the nozzle 48 by a hose. A second fixing frame 53 is fixedly connected to the inner wall of the sampling housing 27. A second rotating shaft 55 is rotatably provided at the center point of the second fixing frame 53. A conversion fan blade 54 is connected to the top of the second rotating shaft 55. The two nozzles 48 are aligned with the blades of the two conversion fan blades 54. A protective shell 50 is fixedly connected to the left side of the sampling inner tank 52. The second rotating shaft 55 passes through the top through hole of the protective shell 50. The two rinsing devices are symmetrically distributed with the longitudinal central axis of the sampling inner tank 52 as the center. Specifically, the disinfected clean water is delivered to the nozzle 48 through a hose. The nozzle 48 sprays high-pressure water to impact the blades of the conversion fan 54, driving the conversion fan 54 to rotate the second shaft 55. At the same time, the high-pressure water sprays and rinses the inner wall of the sampling housing 27 and the surface of the sampling inner liner 52 to remove residual sewage and impurities.

[0017] In this embodiment, the nitrogen replenishment device includes a nitrogen replenishment component 5, which is installed on the rear inner wall of the first fixed frame 4. An output pump 3 is installed at the output port of the nitrogen replenishment component 5, and an intake one-way valve 46 is installed at the inlet of the first three-way pipe 42. A hose is connected between the output port of the output pump 3 and the input port of the intake one-way valve 46. Specifically, after rinsing, the output pump 3 is started, and the high-pressure nitrogen in the nitrogen replenishment component 5 enters the first three-way pipe 42 through the hose and the air inlet check valve 46, and then enters the sampling inner tank 52 through the water pipe 47 to dry the residual rinsing water inside the sampling mechanism; the air inlet check valve 46 prevents sewage or air from flowing back into the nitrogen delivery channel; after drying, the output pump 3 is turned off to avoid the sample being diluted or contaminated by water during subsequent sampling.

[0018] In this embodiment, the second filtering device includes a liner 68, a plurality of return springs 67, a plurality of guide sleeves 69, and a filter plate 70. The inner wall of the sampling inner liner 52 is fixedly connected to the liner 68. The plurality of return springs 67 are respectively disposed inside the plurality of guide sleeves 69. The two ends of the plurality of return springs 67 and the plurality of guide sleeves 69 are respectively fixedly connected to the bottom of the liner 68 and the top of the filter plate 70. Specifically, after the wastewater enters the sampling inner tank 52, it first passes through the filter plate 70 for filtration. Large particles of sludge are intercepted on the filter plate 70, and the filtered wastewater is discharged through the outlet hole of the sampling inner tank 52. During the filtration process, the reset spring 67 can buffer the impact of wastewater and prevent damage to the filter plate 70. When there is a lot of sludge accumulated on the filter plate 70, it is cleaned by the cleaning device.

[0019] In this embodiment, the cleaning device on the left includes a third bevel gear 56, a second rotating shaft 55 fixedly connected to the third bevel gear 56, a fifth bevel gear 58 meshing with the right side of the third bevel gear 56, a third rotating shaft 59 fixedly connected to the right side of the fifth bevel gear 58, a cam 60 fixedly connected to the right side of the third rotating shaft 59, the cam 60 abutting against the top of the filter plate 70, a sixth bevel gear 61 meshing with the bottom of the fifth bevel gear 58, a scraper 62 fixedly connected to the bottom of the sixth bevel gear 61, the bristles of the scraper 62 abutting against the bottom of the filter plate 70, and the two cleaning devices are symmetrically distributed with the longitudinal central axis of the sampling inner liner 52 as the center. Specifically, the rotation of the second shaft 55 drives the third bevel gear 56 to rotate, and the third bevel gear 56 meshes with and drives the fifth bevel gear 58 to rotate, which in turn drives the third shaft 59 and the cam 60 to rotate. The cam 60 rotates eccentrically and pushes the filter plate 70 downward, compressing the return spring 67. When the eccentric end of the cam 60 leaves the filter plate 70, the return spring 67 rebounds and drives the filter plate 70 to vibrate upward, shaking off the surface sludge. At the same time, the fifth bevel gear 58 meshes with and drives the sixth bevel gear 61 to rotate, driving the scraper 62 to rotate and scrape the sludge at the bottom of the filter plate 70, realizing the dual function of vibration and scraping to clean, ensuring that the filter plate 70 is clean and smooth.

[0020] In this embodiment, the sludge transfer device on the left includes a dust collection hood 43, an extension plate of which is connected to the front side of the sampling housing 27, a fourth bevel gear 57 meshing with the front side of the third bevel gear 56, a fourth rotating shaft 63 fixedly connected to the front side of the fourth bevel gear 57, a third gear 65 fixedly connected to the front side of the fourth rotating shaft 63, a fourth gear 64 meshing with the right side of the third gear 65, a transfer screw 66 fixedly connected to the front side of the fourth gear 64, a discharge check valve 44 installed at the discharge port of the dust collection hood 43, an extension shaft of the transfer screw 66 penetrating the housing of the discharge check valve 44, and a guide cylinder 45 connected to the discharge port of the discharge check valve 44. The two sludge transfer devices are symmetrically distributed with the longitudinal central axis of the sampling inner liner 52 as the center. Specifically, the rotation of the third bevel gear 56 drives the rotation of the fourth bevel gear 57, which in turn drives the transmission screw 66 to rotate through the transmission of the fourth shaft 63, the third gear 65, and the fourth gear 64. The sludge cleaned by the cleaning device falls into the ash collection hood 43. The rotation of the transmission screw 66 pushes the sludge forward and discharges it to the external collection device through the discharge check valve 44 and the guide cylinder 45. The discharge check valve 44 prevents the discharged sludge from flowing back and avoids re-contamination of the filter plate 70.

[0021] In this embodiment, the rotating device includes a support frame 2, which is fixedly connected to the inner wall of the sampling device body 1. A rotating box 6 is rotatably provided in the interlayer of the support frame 2. A first circular rack 20 is sleeved and connected to the outer periphery of the extension plate of the rotating box 6. A first gear 22 is installed on the front side of the first circular rack 20. A second rotating motor 21 is installed on the top of the support frame 2. The output shaft of the second rotating motor 21 is connected to the first gear 22. A sealing cover 7 is snapped onto the rotating box 6. A plurality of sensing plates 19 are fixedly connected to the top of the sealing cover 7. A sensing component 9 is installed on the front side of the first fixed frame 4. Any one of the multiple sensing plates 19 senses each other with the sensing head of the sensing component 9. Specifically, multiple empty reagent bottles are placed into the rotating box 6 and the sealing cap 7 is closed; the second rotating motor 21 is started, driving the first gear 22 to rotate, and the first gear 22 meshes and drives the first circular rack 20 to rotate, thereby driving the rotating box 6 and the reagent bottles to rotate synchronously; when a certain sensing plate 19 rotates to align with the sensing head of the sensing component 9, the sensing component 9 sends a signal to the central control system to control the second rotating motor 21 to stop rotating. At this time, the corresponding reagent bottle is exactly located directly below the outlet nozzle 8, completing the precise switching of the reagent bottle; after sampling is completed, the above process is repeated to achieve batch sampling.

[0022] The implementation principle of a wastewater sampling device for water conservancy surveying in this application embodiment is as follows: 1. Height Adjustment Stage: After the central control system issues an adjustment command, the first rotating motor 17 of the height adjustment device starts, and its output shaft drives the second bevel gear 18 to rotate at a constant speed. Since the second bevel gear 18 meshes with the first bevel gear 16 on the left, the power is transmitted in a different direction through the bevel gear set. At the same time, the screw 71 fixed at the bottom of the second bevel gear 18 rotates synchronously. The screw 71 is threaded with the connecting rod 39, converting the rotational motion into linear motion, which drives the connecting rod 39 to rise and fall smoothly along the sliding sleeve 38 at the bottom of the connecting frame 72. Since the bottom end of the connecting rod 39 is fixedly connected to the sampling housing 27, the entire sampling mechanism, including the sampling inner tank 52 and the sewage suction component 23, rises and falls synchronously. At this time, the guide rod 24 slides synchronously along the installation channel between the connecting frame 72 and the sampling housing 27, limiting the rotation trend of the sampling mechanism and ensuring that the lifting process is smooth and without shaking. When the sampling mechanism descends to the preset sampling height, the central control system controls the first rotating motor 17 to stop running, completing the height positioning. During this process, the rotation of the first bevel gear 16 synchronously drives the rotation of the first rotating shaft 15 on the left side. Through the transmission cooperation between the synchronous toothed pulley 11 and the synchronous toothed belt 10, the second gear 28 at the top of the first filter device is driven to rotate. The second gear 28 meshes with the second circular rack 29 on the periphery of the filter sleeve 32, causing the filter sleeve 32 to rotate at a uniform speed in advance, forming centrifugal force for filtration in advance, and preparing for the subsequent backwash water circulation.

[0023] 2. Sampling Stage: After the height positioning is completed, the central control system triggers the sampling command, and the second rotating motor 21 of the rotating device starts. Its output shaft drives the first gear 22 to rotate. The first gear 22 meshes with the first circular rack 20 on the periphery of the extension plate of the rotating box 6, driving the rotating box 6 to rotate the internal reagent bottle at a constant speed along the interlayer of the support frame 2. When a certain sensing plate 19 on the top of the sealing cap 7 rotates to align with the sensing head of the sensing component 9 on the front side of the first fixed frame 4, the sensing component 9 immediately sends a positioning signal to the central control system. The central control system controls the second rotating motor 21 to stop running. At this time, the corresponding first reagent bottle is precisely located directly below the outlet nozzle 8, completing the reagent bottle positioning. Subsequently, the two-position two-way solenoid valve 51 of the sampling mechanism is energized and opened, and the self-priming pump of the sewage absorption component 23 is started. Under the negative pressure of the pump body, the external sewage enters through the inlet of the sampling inner tank 52 and is pre-treated by the filter plate 70 of the second filter device. Large particles of sludge are intercepted on the filter plate 70. The filtered sewage flows out through multiple outlet holes at the bottom of the sampling inner tank 52 and is prevented from flowing back into the water pipe 47 by the third outlet check valve 49. The sewage is transported along the water pipe 47 to the first three-way pipe 42, and then enters the sewage absorption component 23 through the second inlet check valve 41 to prevent the sewage from flowing back into the nitrogen channel. After being pressurized by the pump body, it is sprayed out at a uniform speed from the outlet nozzle 8 and accurately injected into the reagent bottle positioned below. When the preset sampling volume is reached, the central control system controls the sewage absorption component 23 to stop operating, and at the same time, the two-position two-way solenoid valve 51 is de-energized and closed, completing a single sampling. During this process, the liquid-gas separation pressure relief valve 40 at the outlet of the first three-way pipe 42 works in real time to balance the pressure fluctuations inside the sampling inner tank 52 caused by the flow of sewage, and to avoid excessive pressure that could damage the sampling inner tank 52 or affect the sampling flow rate.

[0024] 3. Cleaning and Sludge Treatment Stage: After a single sampling is completed, to avoid residual wastewater contaminating subsequent samples, the cleaning and sludge treatment process is immediately initiated. First, the water pump 73 of the first filtration device is started, drawing pre-treated clean water or filtered disinfected water left over from the previous operation into the second three-way pipe 74. The clean water is then delivered to the nozzles 48 of the two rinsing devices through two second outlet one-way valves 37 to prevent backflow. High-pressure clean water is atomized and sprayed from the nozzles 48, directly rinsing the inner wall of the sampling housing 27 and the outer surface of the sampling inner liner 52 under high pressure. At the same time, it precisely impacts the blades of the conversion fan 54. Under the impact of the water flow, the conversion fan 54 drives the second rotating shaft 55 to rotate at a constant speed along the center point of the second fixed frame 53. The rotation of the second rotating shaft 55 synchronously drives the third bevel gear 56 of the cleaning device to rotate. The third bevel gear 56 meshes with the fifth bevel gear 58 on the right side, and the power is transmitted to the third rotating shaft 59 in a different direction, driving the cam 60 to rotate at a constant speed. The eccentric end of the cam 60 periodically pushes the top of the filter plate 70, causing the filter plate 70 to move downward against the elastic force of the return spring 67. When the eccentric end of the cam 60 leaves the filter plate 70, the return spring 67 elastically rebounds under the limiting action of the guide sleeve 69, causing the filter plate 70 to vibrate upward and shake off the sludge intercepted on the surface. At the same time, the fifth bevel gear 58 meshes with the sixth bevel gear 61 at the bottom, driving the scraper 62 to rotate synchronously. The bristles of the scraper 62 closely adhere to the bottom of the filter plate 70 and scrape, thoroughly cleaning the stubborn sludge remaining, achieving a dual cleaning of "vibration shaking + rotation scraping". At the same time, the third bevel gear 56 meshes with the fourth bevel gear 57 on the front side, and the power is transmitted to the third gear 65 through the fourth rotating shaft 63. The third gear 65 meshes with the fourth gear 64 to drive the transmission screw 66 to rotate. The cleaned sludge falls into the ash collection hood 43 under the action of gravity. The rotation of the transmission screw 66 pushes the sludge forward at a uniform speed. The discharge check valve 44 prevents the sludge from flowing back to the sampling mechanism, and the guide cylinder 45 discharges it to the external sludge collection device. If sludge accumulates in the ash collection frame 35 of the first filter device, the sludge pump 36 can be started simultaneously to extract the sludge in the ash collection frame 35 to the pull-out ash collection box 14. After rinsing is completed, water pump 73 stops running and nozzle 48 stops spraying water. Then, the output pump 3 of the nitrogen replenishment device starts, and the high-pressure nitrogen in the nitrogen replenishment component 5 is delivered to the air inlet check valve 46 through the hose. After the check valve opens, the nitrogen enters the first three-way pipe 42, and then enters the sampling inner tank 52 and each sewage channel through the water pipe 47 to blow dry the residual rinsing water inside under high pressure, ensuring that there is no water residue in the channel. After drying is completed, the output pump 3 stops running, the air inlet check valve 46 closes automatically, and the cleaning and sludge treatment process ends.

[0025] Example 2: The difference between this example and Example 1 is that a liquid level sensor is added inside the sampling liner 52 to monitor the sampling volume in real time and achieve accurate quantitative sampling.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wastewater sampling device for water conservancy surveying, comprising: The sampling device body (1) is characterized by: The sampling mechanism is located on the top of the sampling equipment body (1) and is used for sewage sampling. A height adjustment device is installed on the sampling mechanism and is used to adjust the height of the sampling mechanism. The first filtration device, located to the left of the height adjustment device, is used to filter the backwash water. There are two rinsing devices, both of which are located on the sampling mechanism and are used to rinse the sampling mechanism. A nitrogen replenishment device is located at the rear of the sampling mechanism and is used to fill the sampling mechanism with nitrogen. The second filtration device is located at the bottom of the sampling mechanism to prevent sludge from clogging the sampling mechanism. There are two cleaning devices, each located at the bottom of the rinsing device, used to clean the second filter device. Two sludge transfer devices are provided, each located in front of one of the two cleaning devices. They are used to transfer the cleaned sludge to prevent the sludge from flowing back and contaminating the second filtration device. The rotating device, located inside the sampling equipment body, is used to drive multiple reagent bottles to rotate in conjunction with the sampling process.

2. The wastewater sampling device for water conservancy surveying according to claim 1, characterized in that: The sampling mechanism includes a first fixed frame (4) and a sampling inner liner (52). The first fixed frame (4) is connected to the top inner wall of the sampling device body (1). A first protective sleeve (25) is connected to the through hole of the first fixed frame (4). A second protective sleeve (26) is slidably connected to the inner wall of the first protective sleeve (25). A first three-way pipe (42) is connected to the center through hole of the first protective sleeve (25). A second inlet check valve (41) is installed at the bottom outlet of the first three-way pipe (42). A sewage suction assembly (23) is installed at the outlet of the second inlet check valve (41). A discharge spray is installed at the outlet of the sewage suction assembly (23). The nozzle (8) is fixedly connected to the mounting groove of the first fixed frame (4), and a water pipe (47) is fitted inside the second protective sleeve (26) and the first protective sleeve (25). The two ends of the water pipe (47) are fixedly connected to the inlet of the first three-way pipe (42) and the outlet of the sampling inner tank (52), respectively. A sampling shell (27) is fitted around the sampling inner tank (52). A two-position two-way solenoid valve (51) is installed at the inlet of the sampling inner tank (52). A liquid-gas separation pressure relief valve (40) is installed at the outlet of the first three-way pipe (42). A third one-way valve (49) is installed at each of the multiple outlet holes of the sampling inner tank (52).

3. A wastewater sampling device for water conservancy surveying according to claim 2, characterized in that: The height adjustment device includes a first rotating motor (17) and a guide rod (24). The first rotating motor (17) is installed on the top inner wall of the sampling device body (1). The output shaft of the first rotating motor (17) is fixedly connected to a second bevel gear (18). The left side of the second bevel gear (18) is meshed with a first bevel gear (16). The bottom of the second bevel gear (18) is fixedly connected to a screw (71). The bottom end of the screw (71) is threadedly connected to a connecting rod (39). The top of the sampling device body (1) is connected to a connecting frame (72). The bottom of the connecting frame (72) is connected to a sliding sleeve (38). The sliding sleeve (38) is slidably connected to the connecting rod (39). The bottom end of the connecting rod (39) is fixedly connected to the top end of the sampling housing (27). The two ends of the guide rod (24) are fixedly connected to the top end of the sampling housing (27) and the bottom end of the connecting frame (72), respectively.

4. A wastewater sampling device for water conservancy surveying according to claim 3, characterized in that: The first filtration device includes a spiral sterilization glass tube (34), a filter tank (12), and a synchronous toothed belt (10). A first rotating shaft (15) is fixedly connected to the left side of the first bevel gear (16). A synchronous toothed pulley (11) is fixedly connected to the left end of the first rotating shaft (15). The synchronous toothed pulley (11) is connected to another synchronous toothed pulley (11) through the synchronous toothed belt (10). The first rotating shaft (15) is rotatably mounted on the through hole on the left side of the connecting frame (72). A first one-way water inlet is installed in the mounting hole of the filter tank (12). The valve (31) has a rotating connector (30) at its outlet. A filter sleeve (32) is connected to the right side of the rotating connector (30), and another rotating connector (30) is connected to the right side of the filter sleeve (32). A dust collection frame (35) is connected to the inner wall of the left end of the filter tank (12). The dust collection frame (35) is rotatably connected to the other rotating connector (30). The guide tube of the dust collection frame (35) extends out of the filter tank (12), and the guide tube of the dust collection frame (35) extends out of the filter tank (12). A sludge pump (36) is installed at the bottom of the pipe. A pull-out ash collection box (14) is connected to the front side of the first fixed frame (4). The inlet of the pull-out ash collection box (14) is fixedly connected to the outlet of the sludge pump (36). A second circular rack (29) is fitted around the outer periphery of the filter sleeve (32). Multiple second gears (28) mesh around the outer periphery of the second circular rack (29). The left side of the second gear (28) at the top is fixedly connected to the left side of the synchronous toothed pulley (11) at the bottom. The filter tank (12) A first one-way valve (33) is installed at the bottom outlet. An ultraviolet disinfection module (13) is installed on the left side of the first fixed frame (4). A water pump (73) is installed on the right side of the ultraviolet disinfection module (13). A second three-way pipe (74) is installed at the output port of the water pump (73). A second one-way valve (37) is installed at both outlets of the second three-way pipe (74). The two ends of the spiral disinfection glass tube (34) are fixedly connected to the outlet of the first one-way valve (33) and the inlet of the water pump (73), respectively.

5. A wastewater sampling device for water conservancy surveying according to claim 4, characterized in that: The flushing device on the left includes a nozzle (48), which is installed on the mounting hole of the sampling housing (27). The output port of the second water outlet check valve (37) is connected to the input port of the nozzle (48) by a hose. The inner wall of the sampling housing (27) is fixedly connected to a second fixed frame (53). The center point of the second fixed frame (53) is provided with a second rotating shaft (55). The top of the second rotating shaft (55) is connected to a conversion fan blade (54). The two nozzles (48) are aligned with the blades of the two conversion fan blades (54). The left side of the sampling inner liner (52) is fixedly connected to a protective shell (50). The second rotating shaft (55) passes through the top through hole of the protective shell (50). The two flushing devices are symmetrically distributed with the longitudinal central axis of the sampling inner liner (52) as the center.

6. A wastewater sampling device for water conservancy surveying according to claim 5, characterized in that: The nitrogen replenishment device includes a nitrogen replenishment component (5), which is installed on the rear inner wall of the first fixed frame (4). An output pump (3) is installed at the output port of the nitrogen replenishment component (5), and an intake check valve (46) is installed at the inlet of the first three-way pipe (42). A hose is connected between the output port of the output pump (3) and the input port of the intake check valve (46).

7. A wastewater sampling device for water conservancy surveying according to claim 6, characterized in that: The second filtration device includes a liner (68), multiple return springs (67), multiple guide sleeves (69), and a filter plate (70). The inner wall of the sampling inner liner (52) is fixedly connected to the liner (68). The multiple return springs (67) are respectively located inside the multiple guide sleeves (69). The two ends of the multiple return springs (67) and the multiple guide sleeves (69) are respectively fixedly connected to the bottom of the liner (68) and the top of the filter plate (70).

8. A wastewater sampling device for water conservancy surveying according to claim 7, characterized in that: The cleaning device on the left includes a third bevel gear (56), the second rotating shaft (55) is fixedly connected to the third bevel gear (56), the right side of the third bevel gear (56) is meshed with a fifth bevel gear (58), the right side of the fifth bevel gear (58) is fixedly connected to a third rotating shaft (59), the right side of the third rotating shaft (59) is fixedly connected to a cam (60), the cam (60) abuts against the top of the filter plate (70), the bottom of the fifth bevel gear (58) is meshed with a sixth bevel gear (61), the bottom of the sixth bevel gear (61) is fixedly connected to a scraper (62), the bristles of the scraper (62) abut against the bottom of the filter plate (70), and the two cleaning devices are symmetrically distributed with the longitudinal central axis of the sampling inner liner (52) as the center.

9. A wastewater sampling device for water conservancy surveying according to claim 8, characterized in that: The sludge transfer device on the left includes a dust collection hood (43), the extension plate of which is connected to the front side of the sampling housing (27). The front side of the third bevel gear (56) is meshed with a fourth bevel gear (57). The front side of the fourth bevel gear (57) is fixedly connected to a fourth rotating shaft (63). The front side of the fourth rotating shaft (63) is fixedly connected to a third gear (65). The right side of the third gear (65) is meshed with a fourth gear (64). The front side of the fourth gear (64) is fixedly connected to a transfer screw (66). The discharge port of the dust collection hood (43) is equipped with a discharge check valve (44). The extension shaft of the transfer screw (66) passes through the housing of the discharge check valve (44). The discharge port of the discharge check valve (44) is connected to a guide cylinder (45). The two sludge transfer devices are symmetrically distributed with the longitudinal central axis of the sampling inner liner (52) as the center.

10. A wastewater sampling device for water conservancy surveying according to claim 9, characterized in that: The rotating device includes a support frame (2), which is fixedly connected to the inner wall of the sampling device body (1). The interlayer of the support frame (2) is rotatably provided with a rotating box (6). The outer periphery of the extension plate of the rotating box (6) is fitted with a first circular rack (20). A first gear (22) is installed on the front side of the first circular rack (20). A second rotating motor (21) is installed on the top of the support frame (2). The output shaft of the second rotating motor (21) is connected to the first gear (22). A sealing cover (7) is snapped onto the rotating box (6). A plurality of sensing plates (19) are fixedly connected to the top of the sealing cover (7). A sensing component (9) is installed on the front side of the first fixed frame (4). Any one of the sensing plates (19) senses the sensing head of the sensing component (9).

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