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CN-121994870-A - Electrode method water quality detector with cleaning and calibrating functions and detection method

CN121994870ACN 121994870 ACN121994870 ACN 121994870ACN-121994870-A

Abstract

The application relates to an electrode method water quality detector with a cleaning and calibrating function and a detection method, belonging to the technical field of water quality detection, the electrode method water quality detector with the cleaning and calibrating functions comprises a plurality of measuring electrodes, a circular plate, an electric linear module, a rotary driving assembly, a workbench, a plurality of detecting cups, a plurality of cleaning devices and a waste liquid collecting box. The water sample detection method comprises the steps of liquid preparation, pretreatment of a detection cup, electrode alignment and insertion, water sample parameter detection, cleaning after detection, cleaning of a measurement electrode, calibration of the measurement electrode and the like. The application has the advantages of considering detection efficiency, result accuracy and equipment durability, being applicable to batch and continuous water quality detection scenes, effectively reducing labor cost and detection error and improving the overall quality of water quality detection work.

Inventors

  • CHEN DONGXIAO
  • SONG PENGFEI
  • LIANG HAIJIAN

Assignees

  • 山东中节能天融环保技术有限公司

Dates

Publication Date
20260508
Application Date
20251223

Claims (10)

  1. 1. An electrode method water quality testing appearance with wash calibration function, its characterized in that: The device comprises a plurality of measuring electrodes (1), a circular plate (2), an electric linear module (5), a rotary driving assembly, a workbench (6), a plurality of detecting cups (7), a plurality of cleaning devices and a waste liquid collecting box (22); The measuring electrode (1) is detachably connected with the circular plate (2), the measuring electrode (1) is vertically arranged, and the detecting end is positioned below the circular plate (2); the electric linear module (5) drives the circular plate (2) to move up and down, and the rotary driving assembly is used for controlling the circular plate (2) to rotate so as to adjust the azimuth of each measuring electrode (1); the electric linear module (5) is fixedly connected with the workbench (6) through a fixing frame, and the detection cups (7) and the cleaning devices are arranged on the workbench (6) at intervals and are distributed in an annular array around the axis of the circular plate (2), a first liquid discharge pipe (702) is arranged at the bottom of the detection cup (7), a stop valve is connected in series with the first liquid discharge pipe (702), and the tail end of the first liquid discharge pipe is communicated with the waste liquid collecting box (22); The outside of the workbench (6) is provided with a distilled water tank, a detection water tank, a calibration water tank and a high-pressure air supply assembly; The detection water tank and the calibration water tank are communicated with the liquid supply main pipe (27) through a water pipe with a water pump and a stop valve; The water outlet pipeline of the distilled water tank is connected with a water pump, a first three-way valve (23) and a second three-way valve (25) in series, the first three-way valve (23) is communicated with the detection water tank through a first bypass pipe (24), the second three-way valve (25) is communicated with the cleaning device through a second bypass pipe (26), and the tail end of the liquid supply main pipe (27) is communicated with the detection cup (7).
  2. 2. The electrode method water quality detector with cleaning and calibrating functions according to claim 1, wherein: The rotary driving assembly comprises a telescopic control device (3) and a rack (301), and the telescopic control device (3) controls the rack (301) to stretch and retract; A gear (202) is fixed at the top end of the rotating shaft (201), and the gear (202) is meshed with a rack (301) when the circular plate (2) moves upwards to the upper dead point.
  3. 3. The electrode method water quality detector with cleaning and calibrating functions according to claim 2, wherein: a rotating shaft (201) is coaxially fixed above the circular plate (2), and positioning jacks (203) are concavely arranged on the rotating shaft (201) and are radially distributed along the rotating shaft; The circular plate (2) is connected with a sliding part (501) of the electric linear module (5) through a connecting frame (4), a sleeve (401) sleeved outside the rotating shaft (201) is arranged at the end part of the connecting frame (4), and a through hole corresponding to the positioning jack (203) is arranged on the sleeve (401); A guide bracket (16) and a stay cord fixing bracket (18) are fixed on the connecting frame (4); The ejector rod (14) is horizontally arranged and is in sliding connection with a sliding hole on the guide bracket (16), a spring seat (1401) is fixed on the ejector rod (14), a spring (15) is sleeved on the ejector rod (14) and two ends of the spring are respectively abutted with the spring seat (1401) and the guide bracket (16), and the end part of the ejector rod (14) is inserted into the positioning jack (203) through a through hole in a free state; The fork rod (19) is arranged right above the connecting frame (4), an opening (402) corresponding to the fork rod (19) is formed in the connecting frame (4), a fork groove (1901) corresponding to the pull rope (17) is concavely formed in the bottom of the fork rod (19), and when the circular plate (2) moves to the upper dead point, the pull rope (17) is pressed down by the fork groove (1901) to enable the ejector rod (14) to be separated from the positioning jack (203).
  4. 4. The electrode method water quality detector with cleaning and calibrating functions according to claim 1, wherein: The inner wall of the detection cup (7) is concavely provided with a spiral groove (703), a first liquid inlet pipe (701) is connected to the outside in a penetrating way, and the first liquid inlet pipe (701) is communicated with a top port of the spiral groove (703); An upper cover (8) is covered at the opening of the detection cup (7), a penetrating hole is formed in the center of the upper cover (8), and the inner diameter of the penetrating hole is larger than the outer diameter of the detection end of the measurement electrode (1).
  5. 5. The electrode method water quality detector with cleaning and calibrating functions according to claim 1, wherein: The cleaning device comprises a cleaning cup (9), an annular water pipe (11) and a pneumatic assembly; The upper end of the cleaning cup (9) is open, the bottom is connected with a second liquid discharge pipe (901) in a penetrating way, the second liquid discharge pipe (901) is connected with a stop valve in series, and the tail end of the second liquid discharge pipe is communicated with a waste liquid collecting box (22); The annular water pipe (11) is coaxially arranged in the cleaning cup (9), a through hole which is inclined inwards and downward is formed in the annular water pipe, and a second liquid inlet pipe (1101) which is communicated with the annular water pipe (11) is arranged outside the cleaning cup (9); The pneumatic assembly is communicated with an air inlet pipe (903) outside the cleaning cup (9), and the annular water pipe (11) is arranged below the pneumatic assembly and is tightly attached to the inner wall of the cleaning cup (9).
  6. 6. The electrode water quality detector with cleaning and calibrating functions according to claim 5, wherein: the cleaning cup (9) is internally provided with a cleaning component (10), and the cleaning component (10) is positioned between the annular water pipe (11) and the pneumatic assembly and comprises a clamping ring (1001) and a plurality of brushes (1002); the outer wall of the clamping ring (1001) is abutted with the inner wall of the cleaning cup (9), and the hairbrush (1002) is fixed on the inner side of the clamping ring (1001); The inner wall of the cleaning cup (9) is convexly provided with a supporting ring (902), and the bottom surface of the clamping ring (1001) is abutted with the top surface of the supporting ring (902).
  7. 7. The electrode method water quality detector with cleaning and calibrating functions according to claim 6, wherein: the pneumatic assembly comprises two fixed rings (12) and a rotating ring (13) which are oppositely arranged at intervals up and down, and the fixed rings (12) and the rotating ring (13) are coaxial with the cleaning cup (9); the fixing rings (12) comprise supporting rings (1201), clamping rings (1202) and mounting rings (1203) are respectively and convexly arranged at the inner end and the outer end of the supporting rings (1201), the mounting rings (1203) are fixedly connected with the inner wall of the cleaning cup (9), and the supporting rings (1201) of the two fixing rings (12) are respectively positioned at the upper side and the lower side of the through holes of the air inlet pipe (903) and the cleaning cup (9); clamping grooves (1302) are concavely formed in the upper side and the lower side of the inner wall of the rotating ring (13), the clamping grooves (1302) are clamped with the clamping rings (1202), a plurality of air ejector pipes (1303) are fixed in the middle of the rotating ring (13), the air ejector pipes (1303) are communicated with an inner cavity formed by the rotating ring (13) and the fixed ring (12), and air is ejected from the outlets of the air ejector pipes (1303) to form tangential air flow; The bottom of the rotating ring (13) is provided with air jet holes (1304) with the inner side inclined downwards, the air jet holes (1304) are communicated with the inner cavity of the cleaning cup (9), The outside of the rotating ring (13) is fixedly connected with the clamping ring (1001) through a plurality of connecting rods (1305).
  8. 8. The electrode method water quality detector with a cleaning and calibrating function according to claim 1, wherein: the connecting port of the liquid supply main pipe (27) and the calibration water tank is nearest to the first liquid inlet pipe (701), the connecting port of the liquid supply main pipe (27) and the distilled water tank is farthest from the first liquid inlet pipe (701), and the high-pressure gas supply assembly comprises an air compressor, a high-pressure gas cylinder, a pressure regulating valve and corresponding connecting gas pipes.
  9. 9. The water sample detection method is characterized by comprising the following steps of: s01, preparing liquid: Filling a sufficient amount of water sample to be detected into the detection water tank, and filling distilled water into the distilled water tank to ensure that the waste liquid collecting tank (22) is in an empty state; s02, pretreatment of a detection cup: Injecting a water sample to be detected into the detection cup (7) through the first liquid inlet pipe (701), guiding the water sample to form vortex by using a spiral groove (703) on the inner wall of the detection cup (7) so as to clean the detection cup (7), and simultaneously opening a stop valve on the first liquid outlet pipe (702) to enable the cleaned water sample to be detected to flow into the waste liquid collecting box (22); Closing a stop valve on the first liquid discharge pipe (702) after cleaning is finished, and injecting a water sample to be detected into the detection cup (7) to a detection height, so that the detection end can be completely immersed into the water sample to be detected after the measurement electrode (1) moves downwards; S03, electrode alignment and insertion: in the initial state, the circular plate (2) is near the bottom dead center, the ejector rod (14) is pushed by the spring (15) to be inserted into the positioning jack (203) of the rotating shaft (201) to lock the circular plate (2), and the measuring electrode (1) is opposite to the detecting cup (7); starting an electric linear module (5) to drive a connecting frame (4) and a circular plate (2) to move downwards, enabling a detection end of a measuring electrode (1) to penetrate through an upper cover (8) and penetrate through a jack to dip into a water sample to be detected of a detection cup (7), and stopping moving downwards after the detection end is completely immersed; S04, detecting water sample parameters: after the electrode (1) to be measured is fully contacted with the water sample and stabilized for 1-3 minutes, recording detection data; Starting the electric linear module (5) to drive the circular plate (2) to move upwards to the upper dead point, pressing the pull rope (17) by the fork rod (19) to enable the ejector rod (14) to be separated from the positioning jack (203), and simultaneously enabling the gear (202) at the top end of the rotating shaft (201) to be meshed with the rack (301); Starting the electric linear module (5) to drive the circular plate (2) to move downwards, reinserting the ejector rod (14) into the positioning jack (203) to lock the circular plate (2), recording detection data after the immersed water sample at the electrode detection end is stable, and finishing parameter detection of all the measurement electrodes (1); S05, cleaning after detection: after the detection is completed, the electric linear module (5) is started to drive the circular plate (2) to move upwards so that the measuring electrode (1) is completely separated from the detection cup (7); Opening a stop valve of the first liquid discharge pipe (702), discharging the water sample to be detected in the detection cup (7) into the waste liquid collecting box (22), and closing the stop valve; If different water samples need to be continuously detected, switching a first three-way valve (23) to enable distilled water to be injected into a detection water tank through a first bypass pipe (24), flushing a detection cup (7) and a pipeline through a liquid supply main pipe (27) and a first liquid inlet pipe (701), discharging flushing liquid into a waste liquid collecting box (22), and repeating for 2-3 times to finish cleaning; s06, cleaning a measuring electrode: When partial measuring electrodes (1) are used for water sample detection, the rest measuring electrodes (1) are inserted into a cleaning cup (9) for cleaning; The detection end of the measuring electrode (1) passes through the cleaning assembly (10), and the hairbrush (1002) mechanically scrapes the outer surface of the electrode; continuously moving downwards to the relative position of the annular water pipe (11), introducing distilled water into the annular water pipe (11), and spraying the distilled water to flush the surface of the electrode through the inner inclined downward through hole; simultaneously, high-pressure air is introduced, the high-pressure air is sprayed out through an air spraying pipe (1303) of the rotating ring (13) to form tangential air flow to drive the rotating ring (13) to rotate, the rotating ring (13) drives the cleaning assembly (10) to synchronously rotate through a connecting rod (1305), and the air spraying holes (1304) spray rotating air flow to the surface of the electrode; In the upward moving process of the measuring electrode (1), the residual distilled water on the surface of the measuring electrode is blow-dried by air flow; S07, calibrating a measuring electrode: cleaning the measuring electrode (1) and the detecting cup (7) is completed before calibration; Injecting standard calibration liquid into the calibration water tank, switching a valve to enable the liquid supply main pipe (27) to be communicated with the calibration water tank, injecting the calibration liquid into the detection cup (7) through the first liquid inlet pipe (701) to form vortex, and standing for 2-5 minutes; aligning the measuring electrode (1) to be calibrated to the upper part of the calibration liquid detecting cup (7), and moving downwards to enable the detecting end to be immersed in the calibration liquid; After the electrode detection value is stable, comparing the detection value with a standard value of a calibration solution, and adjusting the electrode coefficient to finish calibration; After calibration, the electrode is moved up, the calibration liquid is discharged and the test cup (7) is rinsed 2-3 times.
  10. 10. The water sample detection method according to claim 9, wherein: in step S06, during the process of introducing high pressure air into the high pressure air supply assembly, the air flow blown downwards by the air injection holes (1304) blows away the dirt remained on the brush (1002), so as to realize self-cleaning of the cleaning assembly (10).

Description

Electrode method water quality detector with cleaning and calibrating functions and detection method Technical Field The application belongs to the technical field of water quality detection, and particularly relates to an electrode method water quality detector with a cleaning and calibrating function and a detection method. Background In fields such as environmental protection monitoring, hydraulic engineering, industrial wastewater treatment and drinking water safety guarantee, accurate detection of water quality parameters is a core link for realizing water quality control. The electrode method is used as a mature water quality detection technology, and is widely applied to the determination of key parameters such as pH value, dissolved oxygen, conductivity, turbidity and the like of a water sample by virtue of the advantages of simple operation, rapid response, real-time monitoring and the like. The key principle of the technology is that the detection end of the measuring electrode and the water sample are utilized to generate electrochemical or physical action to convert the water quality parameter into an identifiable electric signal, so that quantitative analysis of the water quality index is realized, and the detection precision is directly dependent on the cleanliness and stability of the detection end of the measuring electrode and the rationality of the detection flow. However, the existing electrode water sample detection technology and the matched device mostly adopt a single high-pressure water flow flushing or low-pressure air flow purging mode for cleaning the measuring electrode, and lack a specific stubborn dirt treatment mechanism. Biofilm, suspended particles, organic viscous impurities and the like which are commonly contained in a water sample are easy to adhere closely to the surface of the electrode detection end, loose dirt on the surface can be removed only by single water flow flushing, the stubborn attachments cannot be effectively stripped, and the pure air flow flushing can only realize a drying function and has no cleaning effect on the adhered dirt. The existing electrode method water quality monitoring device mostly adopts the structural design of a single electrode, a single detection cup and a single cleaning station, the detection flow is required to follow a serial mode of detecting, taking out the electrode, cleaning, drying and then detecting again, namely, the detection of the next water sample can be carried out after the cleaning and drying of the previous electrode are required to be completed. For a multi-parameter detection scene, different types of electrodes need to be replaced frequently, or the same electrode is alternately used for detecting a plurality of water samples, and the waiting time for cleaning occupies more than 50% of the detection period, so that the single detection takes too long. Although a part of the device is provided with multiple electrodes, the arrangement of the cleaning stations and the detection stations lacks of collaborative design, electrode switching and station switching depend on manual operation, the automation degree is low, misoperation easily occurs, a parallel operation mode of synchronous detection and cleaning cannot be realized, the overall detection efficiency is low, and the requirement of rapid detection of batch water samples is difficult to meet. Disclosure of Invention The application aims to solve the technical problems that: the application provides an electrode method water quality detector with a cleaning and calibrating function and a detection method, which are suitable for batch and continuous water quality detection scenes, can effectively reduce labor cost and detection error and improve the overall quality of water quality detection work. The application solves the problems existing in the prior art by adopting the technical scheme that: An electrode method water quality detector with a cleaning and calibrating function comprises a plurality of measuring electrodes, a circular plate, an electric linear module, a rotary driving assembly, a workbench, a plurality of detecting cups, a plurality of cleaning devices and a waste liquid collecting box. The measuring electrode is detachably connected with the circular plate, the measuring electrode is vertically arranged, and the detecting end is positioned below the circular plate. The electric linear module drives the circular plate to move up and down, and the rotary driving assembly is used for controlling the circular plate to rotate so as to adjust the azimuth of each measuring electrode. The electric linear module is fixedly connected with the workbench through the fixing frame, and the detection cups and the cleaning device are arranged on the workbench at intervals and are distributed in an annular array around the axis of the circular plate. The bottom of the detection cup is provided with a first liquid discharge pipe, and the first liquid discharge