Automatic cleaning and anti-blocking sampling head for water quality on-line monitoring instrument

Abstract

The sampling device comprises a sampling head, a pipe collecting piece, a sampling head supporting piece and a cleaning box body, the sampling head comprises a bearing disc, a placing disc, a filter cage, a conical block and a water pumping part, the placing disc is fixed at the bottom of the bearing disc, the conical block is arranged at the bottom of the filter cage, and the water pumping part is arranged in the filter cage; a water level block is arranged on the outer side wall of the filter cage, a plurality of water level jet heads are arranged on the water level block, and a plurality of flocculation breaking jet heads are arranged on the conical block. According to the automatic cleaning and anti-blocking sampling head for the water quality on-line monitoring instrument, the blocking problem caused by impurities in the sampling process can be effectively avoided, the purity of a collected water sample is guaranteed, and therefore the accuracy of water quality monitoring data is improved; meanwhile, the sampling head can be cleaned without manual intervention, the workload and cost of manual maintenance are reduced, the continuity of sampling operation can be ensured, the risk of monitoring interruption caused by untimely cleaning of parts is reduced, and the long-term and stable operation requirement of water quality online monitoring is met.

Description

Technical Field

[0001] This application relates to the technical field of water sampling, and in particular to an automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments. Background Technology

[0002] In the field of online water quality monitoring, sampling heads are key components for ensuring the accuracy of monitoring data, requiring continuous water sample collection from natural water bodies (such as rivers and lakes). However, existing sampling heads have significant limitations in practical applications: natural water bodies commonly contain floating debris, suspended impurities, and sediments. These substances easily adhere to the filter cage and inner wall of the sampling head, causing filter blockage or pipeline obstruction. This not only interrupts the water sampling process but may also affect the accuracy of subsequent monitoring data due to water flow disturbance caused by blockage. Furthermore, blockage requires manual disassembly and cleaning, which increases the workload and time costs for maintenance personnel. Manual cleaning is also prone to incomplete cleaning, and residual impurities can cause cross-contamination in subsequent sampling. In addition, frequent manual intervention is difficult to adapt to the long-term, continuous operation requirements of remote monitoring sites or large-scale monitoring networks, thus restricting the efficiency and stability of online water quality monitoring. Summary of the Invention

[0003] This application aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, one objective of this application is to provide an automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments, which can effectively avoid clogging problems caused by impurities during sampling, ensure the purity of collected water samples, and thus improve the accuracy of water quality monitoring data; at the same time, the sampling head can be cleaned without manual intervention, reducing the workload and cost of manual maintenance, ensuring the continuity of sampling operations, reducing the risk of monitoring interruption due to untimely cleaning of components, and adapting to the long-term and stable operation requirements of online water quality monitoring.

[0005] To achieve the above objectives, the first aspect of this application provides an automatic cleaning and anti-clogging sampling head for an online water quality monitoring instrument, including a sampling head, a tube receiving fitting, a sampling head support, and a cleaning box.

[0006] The sampling head includes a supporting plate, a placement plate, a filter cage, a conical block, and a water pumping component. The placement plate is fixed to the bottom of the supporting plate, the conical block is provided at the bottom of the filter cage, and the water pumping component is provided inside the filter cage.

[0007] The outer wall of the filter cage is provided with a water level block, and the water level block is provided with several water level jet nozzles. The conical block is provided with several lint-breaking jet nozzles. The water level jet nozzles and lint-breaking jet nozzles are all connected to the air source.

[0008] The receiving fitting is connected to the sampling head to realize the receiving and placement of the sampling head, the sampling head support is used to carry the recovered sampling head, and the cleaning box is used to clean the sampling head.

[0009] The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to the embodiments of this application can effectively avoid clogging problems caused by impurities during sampling, ensure the purity of collected water samples, and thus improve the accuracy of water quality monitoring data. At the same time, the sampling head can be cleaned without manual intervention, reducing the workload and cost of manual maintenance, ensuring the continuity of sampling operations, reducing the risk of monitoring interruption due to untimely cleaning of components, and meeting the long-term and stable operation requirements of online water quality monitoring.

[0010] In addition, the automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments proposed in this application may also have the following additional technical features:

[0011] In one embodiment of this application, the conical block includes a pointed end face and a conical side face, and the lint-breaking jet head is divided into two groups: the first group of lint-breaking jet heads is disposed on the pointed end face of the conical block, and the second group of lint-breaking jet heads is evenly distributed circumferentially along the conical side face of the conical block, and the jet direction of the second group of lint-breaking jet heads in each layer is obliquely outward and downward, with an angle of °-° with the axis of the conical block;

[0012] The water level jet head includes three groups, which are arranged from top to bottom along the height direction of the water level block as an upward oblique jet group, a horizontal jet group, and an downward oblique jet group.

[0013] The jet direction of the upward-sloping jet group is inclined upward at a degree of °-° relative to the radial direction of the water level block; the jet direction of the horizontal jet group is consistent with the radial direction of the water level block; and the jet direction of the downward-sloping jet group is inclined downward at a degree of °-° relative to the radial direction of the water level block.

[0014] Each group of water level jet nozzles is evenly distributed along the circumferential direction of the outer peripheral wall of the water level block.

[0015] Furthermore, the pumping component also includes a pumping pipe, absorbent cotton, and a water collection head;

[0016] The water pumping pipe is located inside the filter cage, and its outer wall is wrapped with absorbent cotton. The water pumping pipe is connected to the water pumping device, and a water collection head is provided at the outlet of the water pumping pipe.

[0017] Furthermore, the water collecting head has a funnel-shaped structure, with its large-diameter end connected to the outlet of the pumping pipe and its small-diameter end sealed to the pumping device, and the inner wall of the water collecting head is provided with several axially extending guide ridges.

[0018] In one embodiment of this application, the pipe receiving component includes a fixing frame, a bearing seat assembly, a multi-axis output device, a pipe reel, a rope reel, a pumping connection pipe, and a pull rope;

[0019] The fixed frame is provided with a bearing seat frame, and a multi-axis output device is installed on the bearing seat frame. The output ends of the multi-axis output device are respectively connected to a tube drum and a rope drum.

[0020] A pumping connection pipe is wound around the pipe reel, and one end of the pumping connection pipe is connected to the pumping component.

[0021] A pull rope is wound on the rope drum, the load-bearing plate and the placement plate are connected by multiple sets of pull posts, and one end of the pull rope is connected to the top of the load-bearing plate.

[0022] The top surface of the placement tray is provided with multiple sets of support rings.

[0023] Furthermore, the pipe receiving fitting also includes a rope guide wheel and a pipe guide wheel. The rope guide wheel and the two sets of pipe guide wheels are all mounted on a fixed frame. The rope body of the pull rope passes around the rope guide wheel. The pipe body of the pumping connection pipe is disposed between the two sets of pipe guide wheels. The pumping port of the pumping connection pipe is connected to the pumping component.

[0024] In one embodiment of this application, the sampling head support includes a sampling head tray, an arc-shaped tray, a strip tray, an entry wheel, and a stop.

[0025] The sampling head tray has an arc-shaped tray at its bottom, and the strip-shaped trays are symmetrically arranged on both sides of the arc-shaped tray. Several driving wheels are spaced along the length of the strip-shaped tray. A stop is provided at the end of the strip-shaped tray away from the arc-shaped tray. The stop is elastically connected to the inside of the sampling head tray. The stop is an inclined block structure, with an inclined surface on the side facing the entrance of the strip-shaped tray and a vertical surface on the side away from the entrance.

[0026] The multi-wheel drive device is installed on the outside of the sampling head tray, and adjacent driving wheels are connected through drive wheels. The output of the multi-wheel drive device is connected to one of the driving wheels.

[0027] The inner diameter of the arc-shaped tray is larger than the outer diameter of the tray being placed on by mm-mm.

[0028] In one embodiment of this application, the cleaning box includes a cleaning chamber and a lifting motor. The bottom of the cleaning chamber is connected to the output end of the lifting motor, and an ultrasonic cleaning device is provided inside the cleaning chamber.

[0029] In one embodiment of this application, it further includes a three-part pipe and an external water source inlet. The external water source inlet is connected to the water inlet of the cleaning tank through a first branch pipe and to the water inlet of the three-part pipe through a second branch pipe.

[0030] The three-way pipe has three interfaces: its inlet port is connected to the second branch pipe, its first outlet port is connected to the end of the pumping connection pipe near the pipe reel through a pipe, and its second outlet port is connected to the input end of the external pumping equipment through a pipe.

[0031] In one embodiment of this application, the device further includes a detection chamber and a cover, with the cover hinged to one side of the detection chamber. A tube receiving fitting, a sampling head support, and a cleaning box are disposed inside the detection chamber, with the cleaning box located below the sampling head support.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0034] Figure 1 This is a schematic diagram of the automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to this application;

[0035] Figure 2 This is a schematic diagram of the back structure of the detection chamber in the automatic cleaning and anti-clogging sampling head of the water quality online monitoring instrument according to this application;

[0036] Figure 3 This is a schematic diagram of the structure of the inlet pipe fitting for the automatic cleaning and anti-clogging sampling head of an online water quality monitoring instrument according to this application;

[0037] Figure 4 This is a schematic diagram of the sampling head in the automatic cleaning and anti-clogging sampling head used in online water quality monitoring instruments according to this application;

[0038] Figure 5 This is a schematic diagram of the split structure of the sampling head in the automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to this application;

[0039] Figure 6 This is a schematic diagram of the conical block in the automatic cleaning and anti-clogging sampling head of the water quality online monitoring instrument according to this application;

[0040] Figure 7 This is a schematic diagram of the water pumping component in the automatic cleaning and anti-clogging sampling head of an online water quality monitoring instrument according to this application;

[0041] Figure 8This is a schematic diagram of the cleaning chamber in the automatic cleaning and anti-clogging sampling head of an online water quality monitoring instrument according to this application.

[0042] Figure 9 This is a schematic diagram of the sampling head and three-part tube in the automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to this application.

[0043] Figure 10 This is a schematic diagram of the sampling head support in the automatic cleaning and anti-clogging sampling head used in online water quality monitoring instruments according to this application.

[0044] As shown in the figure: 1. Testing chamber; 2. Chamber lid; 3. Cleaning chamber; 4. Sampling head; 5. Pipe retraction fitting; 6. Three-way pipe; 7. External water source inlet; 8. Sampling head support; 301. Cleaning chamber; 302. Lifting motor; 401. Support plate; 402. Pull column; 403. Placement plate; 404. Support ring; 405. Filter cage; 406. Water level block; 407. Water level jet nozzle; 408. Conical block; 409. Floc breaking jet nozzle; 410. Pumping component; 4 101. Pumping pipe; 4102. Absorbent cotton; 4103. Water collecting head; 501. Fixing frame; 502. Bearing seat assembly; 503. Multi-axis output device; 504. Pipe reel; 505. Rope reel; 506. Pumping connection pipe; 507. Pull rope; 508. Rope guide wheel; 509. Pipe guide wheel; 801. Sampling head tray; 802. Arc-shaped tray; 803. Strip-shaped tray; 804. Drive-in wheel; 805. Stop head; 806. Multi-wheel transmission device. Detailed Implementation

[0045] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0046] The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to embodiments of this application will be described below with reference to the accompanying drawings.

[0047] like Figures 1-10 As shown in the embodiment of this application, the automatic cleaning and anti-clogging sampling head for an online water quality monitoring instrument includes a sampling head 4, a tube receiving fitting 5, a sampling head support 8, and a cleaning box 3.

[0048] The sampling head 4 includes a supporting plate 401, a placement plate 403, a filter cage 405, a conical block 408, and a water pumping component 410. The bottom of the supporting plate 401 is fixed with the placement plate 403, the bottom of the filter cage 405 is provided with the conical block 408, and the water pumping component 410 is provided inside the filter cage 405.

[0049] The outer wall of the filter cage 405 is provided with a water level block 406, and a number of water level jet nozzles 407 are provided on the water level block 406. A number of lint-breaking jet nozzles 409 are provided on the conical block 408. The water level jet nozzles 407 and the lint-breaking jet nozzles 409 are all connected to the air source.

[0050] The tube receiving fitting 5 is connected to the sampling head 4 to realize the receiving and placement of the sampling head 4. The sampling head support 8 is used to support the recovered sampling head 4. The cleaning box 3 is used to clean the sampling head 4.

[0051] Specifically, during sampling, the retractor 5 releases the sampling head 4, causing it to sink towards the water area to be monitored. During this process, the cone-shaped block 408 first contacts the water surface, and the floc-breaking jet nozzles 409 on its surface activate, using airflow to break up and push away floating flocculation, creating a floc-free sampling area. As the sampling head 4 continues to sink, when the water level block 406 outside the filter cage 405 reaches the water surface, the water level jet nozzles 407 activate, creating an annular air curtain through jets at different angles. This continuously prevents surrounding floating flocculation or impurities from moving towards the filter cage 405 area, maintaining the cleanliness of the sampling area. At this time, the pumping unit 410 inside the filter cage 405 begins operation, extracting the clean water sample and transporting it to the monitoring instrument.

[0052] After sampling is completed, the pipe retractor 5 reverses its movement to retract the sampling head 4. Guided by the sampling head support 8, the sampling head 4 moves to the bearing position and is stably supported by the sampling head support 8. Subsequently, the cleaning box 3 operates to clean the recovered sampling head 4, removing residual impurities adhering to the filter cage 405, the pumping component 410, and the surfaces of various components, in preparation for the next sampling.

[0053] The entire process achieves anti-clogging function through lint-breaking air jets and water level air curtain maintenance, and achieves automatic cleaning through the cleaning action of the cleaning box, ensuring the continuity of sampling and the accuracy of water samples.

[0054] In one embodiment of this application, such as Figures 4-6 As shown, the conical block 408 includes a pointed end face and a conical side face. The lint-breaking jet nozzles 409 are divided into two groups: the first group of lint-breaking jet nozzles is located on the pointed end face of the conical block 408, and the second group of lint-breaking jet nozzles is evenly distributed circumferentially along the conical side face of the conical block 408. The jet direction of the second group of lint-breaking jet nozzles in each layer is obliquely outward and downward, with an angle of 30°-60° with the axis of the conical block 408.

[0055] The water level jet head 407 includes three groups, which are arranged from top to bottom along the height direction of the water level block 406 as an upward oblique jet group, a horizontal jet group, and an downward oblique jet group.

[0056] The jet direction of the upward-sloping jet group is inclined upward at 30°-45° to the radial direction of the water level block 406, the jet direction of the horizontal jet group is consistent with the radial direction of the water level block 406, and the jet direction of the downward-sloping jet group is inclined downward at 30°-45° to the radial direction of the water level block 406.

[0057] Each group of water level jet nozzles 407 is evenly distributed along the circumferential direction of the outer wall of the water level block 406.

[0058] Specifically, during the descent of the sampling head, the floc-breaking jet nozzles 409 of the cone block 408 work synergistically in the following manner: when the cone block contacts the water surface, the first set of floc-breaking jet nozzles on the tip face first sprays air, directly impacting the floating flocs on the water surface and initially breaking up the flocs' aggregation; at the same time, the second set of floc-breaking jet nozzles on the side of the cone is activated. Because they are evenly distributed along the circumference and set in multiple layers, the jet direction is obliquely outward and downward at 30°-60°, forming an airflow that diffuses in all directions, further pushing the broken flocs outward, gradually expanding the floc-free collection area, and creating a clean collection environment for the subsequent descent of the sampling head.

[0059] When the sampling head sinks to the level of the water level block 406 and is flush with the water surface, the water level jet head 407 starts to work: three sets of jet heads distributed along the height of the water level block form a three-dimensional air curtain. The upward jet group sprays air at an angle of 30°-45° to the radial direction to block floating objects from falling into the filter cage area; the horizontal jet group sprays air radially to form a lateral barrier to prevent side impurities from approaching the filter cage; and the downward jet group sprays air at an angle of 30°-45° to the radial direction to inhibit the floating of sediment below.

[0060] Three sets of jet nozzles are evenly distributed around the circumference to ensure that the air curtain covers the entire area around the filter cage, continuously maintaining a clean collection environment and preventing floating lint or other impurities from entering the filter cage during the sampling process, thus ensuring the purity of the water samples collected by the pumping unit.

[0061] In one embodiment of this application, such as Figures 4-7 As shown, the water pumping component 410 also includes a water pumping pipe 4101, absorbent cotton 4102, and a water collecting head 4103;

[0062] The water pumping pipe 4101 is located inside the filter cage 405, and its outer wall is wrapped with absorbent cotton 4102. The water pumping pipe 4101 is connected to the water pumping device, and a water collecting head 4103 is provided at the outlet of the water pumping pipe 4101.

[0063] Specifically, the pumping unit 410 performs the functions of water sample collection and preliminary purification during the sampling process: when the filter cage 405 is in the clean collection area, the external water sample enters the interior through the perforated structure of the filter cage and first comes into contact with the absorbent cotton 4102 wrapped around the outer wall of the pumping pipe 4101. The absorbent cotton further filters the water sample through its porous structure, adsorbing fine suspended impurities in the water and preventing them from entering the pumping pipe and causing blockage.

[0064] Subsequently, under the suction of the pumping device, the water sample, purified by the absorbent cotton, enters the pumping pipe 4101 and flows along the pipe cavity towards the outlet. When the water flow reaches the outlet of the pumping pipe, the water collecting head 4103, through its structural characteristics, gathers the dispersed water flow, forming a stable columnar flow, reducing turbulence during the flow process, ensuring that the water sample enters the subsequent transmission path in a stable state, and guaranteeing the accuracy of the monitoring data.

[0065] In this embodiment, as follows: Figure 7 As shown, the water collecting head 4103 has a funnel-shaped structure. Its large-diameter end is connected to the outlet of the pumping pipe 4101, and its small-diameter end is sealed to the pumping device. The inner wall of the water collecting head 4103 is provided with several axially extending guide ridges.

[0066] During water sampling, the water collection head 4103 achieves efficient water flow convergence through its structural characteristics: when the water sample transported by the pumping pipe 4101 flows out of the outlet, the large-diameter end of the funnel-shaped structure can fully receive the dispersed water flow, avoiding leakage or transmission loss caused by water diffusion. At the same time, the gradual design of the diameter from large to small naturally guides the water flow to converge towards the small-diameter end, gradually reducing the water flow cross section and improving the stability of the water flow velocity.

[0067] During this process, the axially extending guide ridges on the inner wall of the water collection head play a stabilizing role: the guide ridges divide the water flow into several axially extending sub-channels, limiting turbulent phenomena such as rotation and vortices within the water collection head, avoiding bubbles or water flow impacts caused by turbulence, and ensuring that the water sample always flows in a stable laminar state. Finally, the water sample, after being collected and stabilized, enters the subsequent transmission path through the small-diameter end, reducing the impact of water flow disturbance on the physical state of the water sample, such as dissolved oxygen content and suspended particle distribution, providing a stable and consistent water sample basis for subsequent water quality monitoring.

[0068] In one embodiment of this application, such as Figure 3 As shown, the pipe receiving component 5 includes a fixing frame 501, a bearing seat assembly 502, a multi-axis output device 503, a pipe drum 504, a rope drum 505, a pumping connection pipe 506, and a pull rope 507.

[0069] The fixed frame 501 is provided with a bearing seat frame 502, and a multi-axis output device 503 is installed on the bearing seat frame 502. The output ends of the multi-axis output device 503 are respectively connected to the tube drum 504 and the rope drum 505.

[0070] A pumping connection pipe 506 is wound around the pipe reel 504, and one end of the pumping connection pipe 506 is connected to the pumping component 410.

[0071] A pull rope 507 is wound on the rope drum 505. The load-bearing plate 401 and the placement plate 403 are connected by multiple sets of pull posts 402. One end of the pull rope 507 is connected to the top of the load-bearing plate 401.

[0072] The top surface of the placement tray 403 is provided with multiple sets of support rings 404.

[0073] The specific working process during the deployment and retraction of sampling head 4 is as follows:

[0074] When sampling is initiated, the multi-axis output device 503 operates forward under the support of the bearing seat frame 502. Its two output ends synchronously drive the tube reel 504 and the rope reel 505 to rotate. As the tube reel 504 rotates, it gradually releases the wound pumping connection pipe 506, providing a water sample transmission channel for the sampling head 4 to sink. At the same time, the rope reel 505 synchronously releases the pull rope 507. The pull rope 507, through its connection with the top of the load-bearing plate 401, drives the sampling head 4 to slowly sink into the water area to be monitored. During this process, the multiple sets of pull columns 402 between the load-bearing plate 401 and the placement plate 403 evenly transmit the tension, preventing the sampling head 4 from tilting due to uneven force and ensuring a stable sinking posture.

[0075] When sampling is completed and the sampling head 4 needs to be retrieved, the multi-axis output device 503 rotates in reverse, and the tube drum 504 and the rope drum 505 rotate synchronously in opposite directions: the rope drum 505 first applies an upward pulling force to the load-bearing plate 401 through the pull rope 507, driving the sampling head 4 out of the water area; at the same time, the tube drum 504 synchronously retrieves the pumping connection pipe 506 to avoid the connection pipe from getting tangled or worn due to slack and drooping, and finally pulls the sampling head 4 back smoothly to the bearing range of the sampling head support 8.

[0076] In one embodiment of this application, such as Figure 3 As shown, the pipe receiving component 5 also includes a rope guide wheel 508 and a pipe guide wheel 509. The rope guide wheel 508 and the two sets of pipe guide wheels 509 are all installed on the fixed frame 501. The rope body of the pull rope 507 passes around the rope guide wheel 508. The pipe body of the pumping connection pipe 506 is set between the two sets of pipe guide wheels 509. The pumping port of the pumping connection pipe 506 is connected to the pumping component 410.

[0077] When the sampling head is lowered, the rope guide wheel 508 changes the direction of the pull rope 507 and reduces friction; the two sets of pipe guide wheels 509 clamp the pumping connection pipe 506 to prevent it from deviating and avoid the rope and pipe from getting tangled.

[0078] When the sampling head is retrieved, the rope guide wheel 508 guides the pull rope 507 to be neatly wound back onto the rope drum 505, and the tube guide wheel 509 assists the connecting tube 506 to be evenly wound onto the tube drum 504 to prevent twisting and stacking.

[0079] In one embodiment of this application, such as Figure 10 As shown, the sampling head support 8 includes a sampling head tray 801, an arc-shaped tray 802, a strip-shaped tray 803, an entry wheel 804, and a stop 805;

[0080] The sampling head tray 801 has an arc-shaped tray 802 at its bottom. The arc-shaped tray 802 has symmetrical strip trays 803 on both sides. The strip trays 803 have several entry wheels 804 spaced along their length. The end of the strip tray 803 away from the arc-shaped tray 802 has a stop head 805. The stop head 805 is elastically connected to the inside of the sampling head tray 801. The stop head 805 has an inclined block structure. The side facing the entrance of the strip tray 803 is an inclined surface, and the side away from the entrance is a vertical surface.

[0081] The multi-wheel drive device 806 is installed on the outside of the sampling head tray 801. Adjacent driving wheels 804 are connected through drive wheels. The output of the multi-wheel drive device 806 is connected to one of the driving wheels 804.

[0082] The inner diameter of the curved tray 802 is 2mm-5mm larger than the outer diameter of the placement tray 403.

[0083] When the sampling head is retrieved, the multi-wheel transmission device 806 drives the entry wheel 804 to rotate, and the adjacent entry wheels operate synchronously through the transmission wheel, conveying the sampling head along the strip tray 803 to the arc tray 802.

[0084] During the movement of the sampling head, its bottom structure contacts the inclined surface of the stop 805, pushing open the elastically connected stop. When the placement tray 403 reaches the position of the arc-shaped tray 802, because the inner diameter of the arc-shaped tray is 2mm-5mm larger than the outer diameter of the placement tray, it can accurately accommodate the placement tray and achieve positioning. At this time, the stop springs back, and its vertical surface abuts against the sampling head to prevent it from moving backward, thus completing the load-bearing and fixing.

[0085] In one embodiment of this application, the cleaning box 3 includes a cleaning chamber 301 and a lifting motor 302. The bottom of the cleaning chamber 301 is connected to the output end of the lifting motor 302, and an ultrasonic cleaning device is provided inside the cleaning chamber 301.

[0086] After the sampling head is positioned by the sampling head support, the lifting motor 302 drives the cleaning tank 301 to rise until the cleaning tank accommodates the components of the sampling head that need to be cleaned, such as the filter cage and the water pump. Then, the ultrasonic cleaning device is activated, using ultrasonic vibration to remove residual impurities from the surface and crevices of the components. After cleaning is complete, the lifting motor 302 lowers the cleaning tank 301 back to its original position, releasing the sampling head for future use.

[0087] In one embodiment of this application, it further includes a three-way pipe 6 and an external water source inlet 7. The external water source inlet 7 is connected to the water inlet of the cleaning tank 301 through a first branch pipe and to the water inlet of the three-way pipe 6 through a second branch pipe.

[0088] The three-way pipe 6 has three interfaces: its inlet port is connected to the second branch pipe, its first outlet port is connected to the end of the pumping connection pipe 506 near the pipe reel 504 through a pipe, and its second outlet port is connected to the input end of the external pumping equipment through a pipe.

[0089] Specifically, one water source is directly connected to the inlet of the cleaning tank 301 through the first branch pipeline to replenish the cleaning water for the cleaning tank. When the cleaning tank rises to cover the sampling head, this water source works with the ultrasonic cleaning device inside the cleaning tank to soak and ultrasonically clean the exposed parts of the sampling head, such as the filter cage 405 and the water pump 410, to remove impurities attached to the surface.

[0090] Another water source enters the inlet port of the three-way pipe 6 through the second branch pipe. After being diverted by the three-way pipe, one of the branches connects to the end of the pumping connection pipe 506 near the pipe reel 504 through the first outlet port. This water source flows along the pumping connection pipe to the pumping component 410 of the sampling head, flushing the inner wall of the pumping connection pipe and the internal passages of the pumping component, such as the pumping pipe 4101 and the water collecting head 4103, to remove residual water samples and fine impurities, thereby cleaning the internal water path of the sampling head and ensuring that the water path is clean and uncontaminated during the next sampling.

[0091] In one embodiment of this application, the device further includes a detection chamber 1 and a cover 2. The cover 2 is hinged to one side of the detection chamber 1. The tube receiving component 5, the sampling head support component 8, and the cleaning box 3 are disposed inside the detection chamber 1. The cleaning box 3 is located below the sampling head support component 8.

[0092] Specifically, casters with brakes or a combination of casters and directional casters are evenly installed at the four corners or edges of the bottom of the testing chamber 1. The casters can flexibly adjust the direction of the equipment's movement; the brake function can lock the wheels after the equipment reaches the target monitoring point to prevent the equipment from sliding accidentally, thus ensuring the stability of the sampling, cleaning, and testing process.

[0093] In addition, handles or folding handles that are easy to grip can be added to the sides or top of the detection box 1. Operators can push or pull the box by the handles and easily move the entire equipment with the bottom casters.

[0094] In actual use, when the sampling head is lowered, the cone-shaped block 408 first contacts the water surface, and the floc-breaking jet nozzles 409 on its surface spray air simultaneously from the tip and the side of the cone. The tip breaks up the surface floc accumulation, and the airflow on the side of the cone pushes the floc away in all directions, clearing the collection area in advance and preventing the floc from getting tangled in the filter cage 405.

[0095] When the water level block 406 is level with the water surface, the water level jet nozzles 407 on it form a three-dimensional air curtain in three groups: diagonally upward, horizontally, and diagonally downward. This curtain blocks impurities from the top, bottom, and sides from approaching the filter cage 405, thus continuously maintaining the cleanliness of the collection area.

[0096] After the water sample enters through the filter cage 405, it first passes through the absorbent cotton 4102 outside the water pumping pipe 4101 to adsorb fine suspended impurities, thus preventing them from clogging the water pumping pipe 4101 and subsequent passages.

[0097] After the sampling head is fixed by the sampling head support 8, the lifting motor 302 in the cleaning box 3 drives the cleaning box 301 to rise, automatically wrapping the filter cage 405, water pipe 4101 and other parts that need to be cleaned.

[0098] External: The ultrasonic cleaning device inside the cleaning tank 301 is activated to remove impurities from the surface and crevices of the components. An external water source inlet 7 is required to supply water to the cleaning tank 301 through the first branch pipeline.

[0099] Internal: The external water source inlet 7 supplies water to the third branch pipe 6 through the second branch pipe. After the water is diverted, the inner wall of the pipe, the pumping pipe 4101 and the water collection head 4103 are flushed through the pumping connection pipe 506 to prevent residual pollution.

[0100] After cleaning is completed, the lifting motor 302 drives the cleaning tank 301 to descend and reset, and the sampling head is ready to be used.

[0101] In summary, the automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments in this application embodiment can effectively avoid clogging caused by impurities during sampling, ensuring the purity of collected water samples and thus improving the accuracy of water quality monitoring data. At the same time, the sampling head can be cleaned without manual intervention, reducing the workload and cost of manual maintenance, ensuring the continuity of sampling operations, reducing the risk of monitoring interruption due to untimely cleaning of components, and meeting the long-term and stable operation requirements of online water quality monitoring.

[0102] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0103] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0104] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An automatic cleaning and anti-clogging sampling head for water quality on-line monitoring instrument, characterized in that, Includes a sampling head (4), a tube receiving fitting (5), a sampling head support (8), and a cleaning box (3); The sampling head (4) includes a supporting plate (401), a placement plate (403), a filter cage (405), a conical block (408), and a water pumping component (410). The bottom of the supporting plate (401) is fixed with the placement plate (403), the bottom of the filter cage (405) is provided with the conical block (408), and the water pumping component (410) is provided inside the filter cage (405). The filter cage (405) has a water level block (406) on its outer wall, and a number of water level jet nozzles (407) are provided on the water level block (406). A number of lint-breaking jet nozzles (409) are provided on the conical block (408). The water level jet nozzles (407) and the lint-breaking jet nozzles (409) are both connected to the air source. The receiving fitting (5) is connected to the sampling head (4) to realize the receiving and releasing of the sampling head (4), the sampling head support (8) is used to carry the recovered sampling head (4), and the cleaning box (3) is used to clean the sampling head (4).

2. The self-cleaning and anti-clogging sampling head for water quality on-line monitoring instrument according to claim 1, characterized in that, The conical block (408) includes a pointed end face and a conical side face. The lint-breaking jet head (409) is divided into two groups: the first group of lint-breaking jet heads is located on the pointed end face of the conical block (408), and the second group of lint-breaking jet heads is evenly distributed circumferentially along the conical side face of the conical block (408). The jet direction of the second group of lint-breaking jet heads in each layer is obliquely outward and downward, with an angle of 30°-60° with the axis of the conical block (408). The water level jet head (407) includes three groups, which are arranged from top to bottom along the height direction of the water level block (406) as an upward jet group, a horizontal jet group, and a downward jet group; The jet direction of the upward-sloping jet group is inclined upward at 30°-45° to the radial direction of the water level block (406), the jet direction of the horizontal jet group is consistent with the radial direction of the water level block (406), and the jet direction of the downward-sloping jet group is inclined downward at 30°-45° to the radial direction of the water level block (406). Each group of water level jet nozzles (407) is evenly distributed along the circumferential direction of the outer peripheral wall of the water level block (406).

3. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 1, characterized in that, The pumping component (410) also includes a pumping pipe (4101), absorbent cotton (4102), and a water collecting head (4103); The water pumping pipe (4101) is located inside the filter cage (405), and its outer wall is wrapped with absorbent cotton (4102). The water pumping pipe (4101) is connected to the water pumping device, and a water collecting head (4103) is provided at the outlet of the water pumping pipe (4101).

4. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 3, characterized in that, The water collecting head (4103) has a funnel-shaped structure. Its large-diameter end is connected to the outlet of the pumping pipe (4101), and its small-diameter end is sealed to the pumping device. The inner wall of the water collecting head (4103) is provided with several axially extending guide ridges.

5. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 1, characterized in that, The pipe receiving component (5) includes a fixing frame (501), a bearing seat assembly (502), a multi-axis output device (503), a pipe drum (504), a rope drum (505), a pumping connection pipe (506), and a pull rope (507). The fixed frame (501) is provided with a bearing seat frame (502), and a multi-axis output device (503) is installed on the bearing seat frame (502). The output ends of the multi-axis output device (503) are respectively connected to a tube drum (504) and a rope drum (505). A pumping connection pipe (506) is wound around the pipe reel (504), and one end of the pumping connection pipe (506) is connected to the pumping component (410). A pull rope (507) is wound on the rope drum (505), the load-bearing plate (401) and the placement plate (403) are connected by multiple sets of pull posts (402), and one end of the pull rope (507) is connected to the top of the load-bearing plate (401). The top surface of the placement tray (403) is provided with multiple sets of support rings (404).

6. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 5, characterized in that, The pipe receiving component (5) also includes a rope guide wheel (508) and a pipe guide wheel (509). The rope guide wheel (508) and the two sets of pipe guide wheels (509) are all installed on the fixed frame (501). The rope body of the pull rope (507) passes around the rope guide wheel (508). The pipe body of the pumping connection pipe (506) is arranged between the two sets of pipe guide wheels (509). The pumping port of the pumping connection pipe (506) is connected to the pumping component (410).

7. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 1, characterized in that, The sampling head support (8) includes a sampling head tray (801), an arc-shaped tray (802), a strip-shaped tray (803), an entry wheel (804), and a stop (805); The sampling head tray (801) has an arc-shaped tray (802) at its bottom. The arc-shaped tray (802) has strip-shaped trays (803) symmetrically arranged on both sides. The strip-shaped tray (803) has a number of drive wheels (804) spaced along its length. The end of the strip-shaped tray (803) away from the arc-shaped tray (802) has a stop (805). The stop (805) is elastically connected to the inside of the sampling head tray (801). The stop (805) is an inclined block structure. The side facing the entrance of the strip-shaped tray (803) is an inclined surface, and the side away from the entrance is a vertical surface. The multi-wheel drive device (806) is installed on the outside of the sampling head tray (801), and the adjacent driving wheels (804) are connected by drive wheels. The output of the multi-wheel drive device (806) is connected to one of the driving wheels (804). The inner diameter of the arc-shaped tray (802) is 2mm-5mm larger than the outer diameter of the placement tray (403).

8. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 1, characterized in that, The cleaning box (3) includes a cleaning chamber (301) and a lifting motor (302). The bottom of the cleaning chamber (301) is connected to the output end of the lifting motor (302). An ultrasonic cleaning device is provided inside the cleaning chamber (301).

9. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to claim 1, characterized in that, It also includes a three-way pipe (6) and an external water source inlet (7), wherein the external water source inlet (7) is connected to the water inlet of the cleaning tank (301) through a first branch pipe and to the water inlet of the three-way pipe (6) through a second branch pipe; The three-way pipe (6) has three interfaces: its inlet port is connected to the second branch pipe, its first outlet port is connected to the end of the pumping connection pipe (506) near the pipe reel (504) through a pipe, and its second outlet port is connected to the input end of the external pumping equipment through a pipe.

10. The automatic cleaning and anti-clogging sampling head for online water quality monitoring instruments according to any one of claims 1-9, characterized in that, It also includes a detection box (1) and a box cover (2), with the box cover (2) hinged to one side of the detection box (1). The tube receiving fitting (5), the sampling head support (8) and the cleaning box (3) are disposed inside the detection box (1), and the cleaning box (3) is located below the sampling head support (8).

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