An online monitoring water quality sampling device

Abstract

The utility model discloses an online monitoring water quality sampling device, including the float seat, the sampling box body of being fixedly connected on the top of float seat through two support plates, the inlet pipe of lower end protruding float seat, one end with sampling box body upper end intercommunication, the first water pipe of other end with inlet pipe upper end intercommunication, the outlet pipe of intercommunication in sampling box body lower extreme and the elbow pipe of intercommunication in sampling box body top cap, first water pipe detachable connection has water pump on the pipeline between sampling box body and inlet pipe, first water pipe detachable connection has first valve between inlet pipe and water pump, the inlet pipe upper end and horizontal position are higher than the pipe section of first water pipe and have the air pipe on intercommunication, be equipped with the second valve on the air pipe, the vertical section of outlet pipe detachable connection has third valve, the utility model has the advantages of: the present application has effectively prevented the pollution of the residual water of pipeline to the current water sample, and the water quality online monitoring result accuracy has been improved.

Description

Technical Field

[0001] This utility model relates to the field of water quality sampling technology, and in particular to an online water quality monitoring and sampling device. Background Technology

[0002] Online water quality monitoring is a crucial means of ensuring water environment safety and achieving scientific water resource management. To guarantee the accuracy and representativeness of online monitoring data, it is typically necessary to use a water sampling device to collect water samples and transport them to sensors or analysis modules for testing. The performance of the water sampling device directly affects the reliability and stability of the monitoring results.

[0003] Existing water sampling methods mainly include manual sampling and automated sampling. While manual sampling is flexible, it requires personnel to collect samples on-site and send them to a laboratory for testing, which is not only inefficient and labor-intensive but also fails to reflect dynamic changes in water quality in a timely manner. In contrast, automated sampling devices can continuously collect water samples at fixed points or specific time intervals, enabling real-time monitoring in conjunction with online analysis equipment. However, existing sampling devices often have difficulty emptying the sampling tank, leading to sample mixing during continuous sampling and consequently, inaccurate monitoring results. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an online water quality monitoring and sampling device.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] An online water quality monitoring sampling device includes a float base, a sampling box fixed above the float base by two support plates, an inlet pipe extending from the float base at its lower end, a first water pipe with one end connected to the upper end of the sampling box and the other end connected to the upper end of the inlet pipe, an outlet pipe connected to the lower end of the sampling box, and a bend pipe connected to the top cover of the sampling box; a water pump is detachably connected to the first water pipe located between the sampling box and the inlet pipe; a first valve is detachably connected to the first water pipe between the inlet pipe and the water pump; a vent pipe is connected to the upper end of the inlet pipe, and the section of the pipe at a horizontal position higher than the first water pipe; a second valve is provided on the vent pipe; and a third valve is detachably connected to the vertical section of the outlet pipe.

[0007] Furthermore, a controller is detachably connected to the top cover of the sampling box; the controller is electrically connected to the water pump, the first valve, the second valve, and the third valve respectively.

[0008] Furthermore, an online monitoring device for online water quality monitoring is detachably connected to the upper middle part of the sampling box; a protective cover is also detachably connected to the upper part of the sampling box; the online monitoring device and the controller are both located inside the protective cover; the curved air inlet extends out of the side wall of the protective cover.

[0009] Furthermore, a filter screen is fixedly connected to the air inlet of the bent pipe extending from the side wall of the protective cover.

[0010] Furthermore, a cylindrical filter screen is fixedly connected to the water inlet at the lower end of the water inlet pipe.

[0011] Furthermore, the horizontal section of the outlet pipe contacts the upper end of the float seat, and the port of the horizontal section extends out of the side edge of the float seat.

[0012] The beneficial effects of this utility model are:

[0013] By controlling the first, second, and third valves, effective isolation of the pipeline during the sampling and evacuation stages was ensured; residual water in the pipeline was effectively prevented from contaminating the current water sample, thus improving the accuracy of online water quality monitoring results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] In the picture,

[0017] 1-Float base, 2-Sampling box, 3-Inlet pipe, 4-First water pipe, 5-Outlet pipe, 6-Ventilation pipe, 7-Bend, 8-Water pump, 9-First valve, 10-Second valve, 11-Third valve, 12-Online monitoring equipment, 13-Controller, 14-Protective cover;

[0018] 21-Support plate, 31-Cylindrical filter screen, 71-Filter screen. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] Reference Figure 1-2As shown, an online water quality monitoring sampling device includes a float base 1, a sampling box 2 fixed above the float base 1 by two support plates 21, an inlet pipe 3 extending from the float base 1 at its lower end, a first water pipe 4 connected at one end to the upper end of the sampling box 2 and at the other end to the upper end of the inlet pipe 3, an outlet pipe 5 connected to the lower end of the sampling box 2, and a bent pipe 7 connected to the top cover of the sampling box 2; a water pump 8 is detachably connected to the first water pipe 4 located between the sampling box 2 and the inlet pipe 3; a first valve 9 is detachably connected to the first water pipe 4 between the inlet pipe 3 and the water pump 8; a vent pipe 6 is connected to the upper end of the inlet pipe 3 and the section of the pipe that is horizontally higher than the first water pipe 4; a second valve 10 is provided on the vent pipe 6; and a third valve 11 is detachably connected to the vertical section of the outlet pipe 5.

[0021] It should be noted that the float seat 1 provides buoyancy for the entire device, enabling it to float stably on the water surface. The float seat 1 can be made of closed-cell foam material (such as polystyrene foam EPS or extruded polystyrene foam XPS) or hollow plastic floats (such as polyethylene floats formed using rotational molding). Its shape is preferably a flat, streamlined structure with a low center of gravity to enhance resistance to wind and waves and stability, reducing capsizing or violent shaking caused by water flow impact. The float seat 1 can be molded in one piece or assembled from multiple buoyancy modules. The support plate 21 is preferably made of corrosion-resistant metal material (such as stainless steel 304 or 316L) or high-strength engineering plastic (such as glass fiber reinforced polypropylene), and is reliably connected to the float seat 1 and sampling box 2 by means such as bolts or welding to ensure the stability of the overall structure. The sampling box 2 is used to hold the water sample to be tested, and its volume can be set according to monitoring requirements, such as 5 liters, 10 liters, or 20 liters. The sampling chamber 2 is preferably made of a transparent or semi-transparent material (such as polycarbonate PC or polymethyl methacrylate PMMA) to facilitate direct observation of the water sample inside the chamber, including the presence of air bubbles or sediment. The top cover of the sampling chamber 2 is designed to be openable, for example, by using a flange with a silicone sealing ring for sealing, facilitating regular maintenance and cleaning of the interior and preventing biological adhesion or cross-contamination. The lower end of the inlet pipe 3 extends downwards from the float seat 1, with its inlet located at a predetermined depth below the water surface (e.g., 0.5 to 1 meter underwater) to collect representative water samples from a specific water layer, avoiding surface floating objects. The inlet pipe 3 should be made of corrosion-resistant material, such as UPVC, ABS, or stainless steel. One end of the first water pipe 4 is connected to the upper end of the sampling chamber 2, and the other end is connected to the upper end of the inlet pipe 3. On the first water pipe 4, located on the section between the sampling chamber 2 and the inlet pipe 3, a water pump 8 is detachably connected via a quick connector (such as a clamp connector or a pagoda connector). Pump 8 provides power to draw water from inlet pipe 3 and pump it into sampling chamber 2. Pump 8 is preferably a corrosion-resistant, low-power diaphragm pump or peristaltic pump, such as Lange's peristaltic pump series or KNF's diaphragm pump series. Its flow rate and head need to be selected based on the volume of sampling chamber 2, sampling time requirements, and pipeline resistance; for example, the flow rate range is 0.1-1 L / min. A first valve 9 is detachably connected to the first water pipe 4 section between inlet pipe 3 and pump 8 via threads or flanges to control the opening and closing of the water inlet passage. The first valve 9 is preferably a solenoid valve or an electric ball valve for easy automatic control; for example, an ASCO solenoid valve can be selected. The function of the vent pipe 6 and the second valve 10 is as follows: when sampling is required, the second valve 10 is closed, and the water pump 8 operates to draw water into the sampling chamber 2; when sampling is completed or needs to be stopped, the second valve 10 is opened, allowing the upper part of the inlet pipe 3 to communicate with the atmosphere, emptying the water sample in the inlet pipe 3, facilitating the next sampling, and making the results more accurate. The outlet pipe 5 is used to drain the water sample from the chamber or for cleaning after monitoring is completed.The vertical section of the water outlet pipe 5 is detachably connected to a third valve 11 via a quick connector to control the opening and closing of the water outlet passage. The third valve 11 is preferably a solenoid valve or an electric ball valve. The air inlet of the bend 7 faces downwards or to the side, its main function being to smoothly expel air from the sampling chamber 2 when water is injected, avoiding air resistance that could affect water intake efficiency and the accuracy of water sample volume; it also maintains the air pressure inside the chamber consistent with atmospheric pressure. The outlet direction design of the bend 7 effectively prevents rainwater from directly entering.

[0022] Specifically, a controller 13 is detachably connected to the top cover of the sampling box 2; the controller 13 is electrically connected to the water pump 8, the first valve 9, the second valve 10, and the third valve 11. To achieve automated control and data acquisition of the sampling process, the controller 13 is detachably connected to the top cover of the sampling box 2 via a mounting bracket. The controller 13 can be an industrial-grade programmable logic controller (PLC); in this application, a Siemens S7-1200 model is used, but those skilled in the art can select according to their needs. The controller 13 is electrically connected to the water pump 8, the first valve 9, the second valve 10, and the third valve 11 via waterproof cables. The controller 13 can preset various sampling programs, such as timed sampling (e.g., sampling every 4 hours), proportional sampling (triggered by flow signal), or sampling triggered by external monitoring signals (e.g., encrypted sampling after a sudden water quality alarm). It can also precisely control the action sequence of each actuator (e.g., at the start of sampling, the controller 13 closes the second valve 10 and the third valve 11, opens the first valve 9, and then starts the water pump 8 to run for a predetermined time; after sampling, the controller 13 first stops the water pump 8, then closes the first valve 9, and can open the third valve 11 to discharge the water sample according to the preset program).

[0023] Specifically, an online monitoring device 12 for online water quality monitoring is detachably connected to the upper middle part of the sampling box 2; a protective cover 14 is also detachably connected to the upper part of the sampling box 2; both the online monitoring device 12 and the controller 13 are located inside the protective cover 14; the air inlet of the bend 7 extends out of the side wall of the protective cover 14. To achieve the online water quality monitoring function, the online monitoring device 12 is detachably connected to the upper middle part of the sampling box 2 via a clamp or threaded interface. The online monitoring device 12 can integrate various water quality sensors, such as pH sensors (e.g., Mettler Toledo InPro 3250i series), dissolved oxygen sensors (e.g., Hach LDO sc series), turbidity sensors (e.g., Hach SOLITAX sc series), conductivity / TDS sensors (e.g., Hamilton CONDUCTICY 4 series), ORP sensors, or chemical parameter sensors such as ammonia nitrogen and COD. The measuring ends of these sensors should extend into the water sample inside the sampling box 2 to an appropriate depth. The signal output terminal of the online monitoring device 12 is connected to the controller 13 via a cable, transmitting monitoring data to the controller 13 in real time. The controller 13 can process the data, display it on a local screen (optional), store it in its built-in memory, or remotely transmit it to the monitoring center via an integrated / external wireless communication module (such as GPRS, 4G, NB-IoT module, for example, corresponding products for the Internet of Things). To protect the controller 13 and the online monitoring device 12 from environmental factors such as sunlight, rain, and dust, a protective cover 14 is detachably connected to the upper end of the sampling box 2. Both the online monitoring device 12 and the controller 13 are located inside the protective cover 14. The protective cover 14 should be made of waterproof (IP65 rating or above) and UV-resistant materials (such as ASA engineering plastics), and should have necessary cable interfaces and ventilation holes (dustproof nets can be added). The air inlet of the bend 7 needs to extend beyond the side wall of the protective cover 14 to ensure communication with the atmosphere.

[0024] Specifically, to prevent airborne pollutants such as particulate matter, pollen, and insects from entering the sampling chamber 2 through the bend 7, contaminating the water sample, and affecting monitoring accuracy, a filter 71 is fixedly connected to the air inlet of the bend 7 extending from the side wall of the protective cover 14. The filter 71 can be made of stainless steel wire mesh (e.g., 200 mesh) or polyester sintered filter element, and the pore size should be small enough to effectively block impurities while ensuring smooth airflow.

[0025] Specifically, to prevent suspended solids, algae, and small aquatic organisms in the water from clogging the inlet pipe and to extend the maintenance cycle, a cylindrical filter screen 31 is fixedly connected to the inlet at the lower end of the inlet pipe 3. The cylindrical filter screen 31 can also be made of corrosion-resistant 316 stainless steel woven or sintered mesh, and its pore size can be selected according to the water conditions, for example, 100 mesh to 40 mesh (corresponding to an pore size of approximately 0.15mm to 0.4mm), effectively blocking larger impurities while ensuring sufficient water flow. The cylindrical design provides a larger filtration area, reducing the frequency of clogging.

[0026] Specifically, the horizontal section of the outlet pipe 5 contacts the upper end of the float seat 1, and the port of the horizontal section extends beyond the side edge of the float seat 1. This allows the water flow to be guided to the lower outer side of the float seat 1 when discharging water samples or cleaning wastewater, preventing direct scouring of the float seat 1's main structure or affecting the device's buoyancy stability. This application may also include a fixing hinge to secure the device, ensuring smooth monitoring.

[0027] The working principle of this utility model:

[0028] After the device is deployed and positioned in the target water area, the controller 13 initiates the sampling cycle according to a preset program or by receiving a remote command. First, the controller 13 closes the second valve 10 and the third valve 11, opens the first valve 9, and starts the water pump 8. Water in the water area is initially filtered through the cylindrical filter screen 31 at the lower end of the inlet pipe 3 before being pumped into the sampling chamber 2. Air inside the sampling chamber 2 is discharged through the bend pipe 7 and its top filter screen 71. When the water sample reaches a predetermined capacity (controllable by pump running time) or the sampling time is reached, the controller 13 stops the water pump 8 and closes the first valve 9. The online monitoring device 12 monitors the water sample inside the chamber in real time, and the data is recorded, processed, and transmitted wirelessly to the monitoring center by the controller 13. After monitoring is complete, the controller 13 can open the third valve 11 to discharge the water sample through the outlet pipe 5, preparing for the next sampling; or, according to the program settings, the water sample can be stored for a certain period for offline precision analysis in the laboratory. Closing the first valve 9 while simultaneously opening the vent pipe 6 and the second valve 10 allows the water inlet pipe 3 to be emptied as well, further ensuring the accuracy of the next sampling. The controller 13 can also integrate a self-diagnostic function to monitor the water pump operating current, valve status, etc., and alarm when abnormalities occur.

[0029] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An online water quality monitoring and sampling device, characterized in that: The system includes a float seat (1), a sampling box (2) fixed above the float seat (1) by two support plates (21), an inlet pipe (3) extending from the float seat (1) at its lower end, a first water pipe (4) with one end connected to the upper end of the sampling box (2) and the other end connected to the upper end of the inlet pipe (3), an outlet pipe (5) connected to the lower end of the sampling box (2), and a bend pipe (7) connected to the top cover of the sampling box (2); a water pump (8) is detachably connected to the first water pipe (4) located between the sampling box (2) and the inlet pipe (3); a first valve (9) is detachably connected to the first water pipe (4) between the inlet pipe (3) and the water pump (8); a vent pipe (6) is connected to the upper end of the inlet pipe (3) and the section of the pipe that is horizontally higher than the first water pipe (4); a second valve (10) is provided on the vent pipe (6); and a third valve (11) is detachably connected to the vertical section of the outlet pipe (5).

2. The online water quality monitoring sampling device according to claim 1, characterized in that: The top cover of the sampling box (2) is detachably connected to a controller (13); the controller (13) is electrically connected to the water pump (8), the first valve (9), the second valve (10) and the third valve (11).

3. The online water quality monitoring sampling device according to claim 2, characterized in that: The upper middle part of the sampling box (2) is detachably connected to an online monitoring device (12) for online water quality monitoring; the upper part of the sampling box (2) is also detachably connected to a protective cover (14); the online monitoring device (12) and the controller (13) are both located inside the protective cover (14); the air inlet of the bent pipe (7) extends out of the side wall of the protective cover (14).

4. The online water quality monitoring sampling device according to claim 3, characterized in that: A filter screen (71) is fixedly connected to the air inlet of the bend (7) extending out of the side wall of the protective cover (14).

5. The online water quality monitoring sampling device according to any one of claims 1 to 4, characterized in that: A cylindrical filter screen (31) is fixedly connected to the water inlet at the lower end of the water inlet pipe (3).

6. The online water quality monitoring sampling device according to any one of claims 1 to 4, characterized in that: The horizontal section of the outlet pipe (5) contacts the upper end of the float seat (1), and the port of the horizontal section extends out of the side edge of the float seat (1).

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