Total nitrogen online monitor

Abstract

The utility model provides an on-line total nitrogen monitor, which relates to the technical field of environmental monitoring and comprises a shell, an agent feeding component, a circular-truncated-cone-shaped reaction cavity, a driving device, a filtering component and an integrated electric control system, annularly-distributed agent storage cavities are formed in the rotating disc assembly, a rotating disc is driven by a servo motor to rotate in a stepping mode, a regulator is precisely and quantitatively released into the reaction cavity through an elastic structure, the reaction cavity rotates through a driving device to generate centrifugal vortex, and efficient mixing of a water sample and the regulator is achieved; different types of conditioning agents can be pre-stored in the multiple independent cavities, the multi-scene monitoring requirement is met, each fixed cavity corresponds to an independent bottom channel, it is ensured that only one conditioning agent in one cavity is released into the reaction chamber through the bottom channel at a time, and dosage errors or cross infection caused by simultaneous leakage of the multiple cavities is avoided; the filtering assembly can intercept suspended matters, so that the problem of weak anti-interference capability of a traditional monitor is solved; the device has the advantages of accurate and automatic feeding of the regulator, uniform mixing, blockage resistance, continuous online monitoring and the like.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, and in particular to an online total nitrogen monitor. Background Technology

[0002] Total nitrogen (TN) is a crucial indicator of water quality, representing the total amount of inorganic and organic nitrogen in water. It includes inorganic nitrogen such as nitrate nitrogen (NO3⁻), nitrite nitrogen (NO2⁻), and ammonium nitrogen (NH4⁺), as well as organic nitrogen such as proteins, amino acids, and organic amines. In surface water, when nitrogen and phosphorus levels exceed standards, microorganisms proliferate, plankton grow vigorously, and eutrophication occurs, easily leading to serious environmental pollution problems. As a key indicator for assessing eutrophication, online monitoring of TN helps evaluate water pollution and self-purification status. With increasingly stringent environmental protection requirements, the accuracy and efficiency of TN monitoring in water have become critical aspects of water quality monitoring.

[0003] However, existing total nitrogen monitors in water still have the following technical problems in practical applications:

[0004] 1) Manual addition of conditioning agents is inconvenient: When monitoring the water quality of different areas, conditioning agents such as potassium persulfate and buffer solution need to be added manually in quantitative quantities, which increases the complexity of operation and affects the monitoring efficiency. In addition, manual operation is prone to errors, affecting the monitoring accuracy. When frequently changing water samples, the dosage needs to be adjusted repeatedly, which is not conducive to continuous monitoring.

[0005] 2) Weak anti-interference ability and easily affected by suspended matter and impurities: Solid suspended matter in water samples, such as silt and algae, will scatter or absorb light signals, leading to deviations in monitoring data of colorimetric or ultraviolet digestion methods.

[0006] Therefore, we propose an online total nitrogen monitor to address the problems mentioned above. Utility Model Content

[0007] This invention proposes an online total nitrogen monitor. Through the step-by-step rotation of the turntable and the annular distribution design of the fixed cavity, it achieves automatic quantitative addition of the regulator. It also integrates a frustum-shaped reaction chamber and a centrifugal mixing structure with a drive motor, which enables the water sample and regulator to be mixed quickly and evenly. Suspended solids are filtered through the filter assembly, achieving efficient digestion, resistance to suspended solids interference, and fully automated monitoring throughout the process, thereby solving the problems mentioned in the background technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an online total nitrogen monitor, comprising a housing and a dosing assembly, wherein the dosing assembly is located in the inner cavity of the housing and extends to the outer end of the housing;

[0009] The dosing assembly includes a servo motor located at the upper end of the housing. The output shaft of the servo motor drives a positioning column. A turntable assembly is mounted on the outside of the positioning column. The turntable assembly includes a tray fitted onto the outside of the positioning column. The tray has a central hole located at the center of the turntable assembly and not in contact with the positioning column. A fixing cavity located inside the turntable assembly is formed outside the central hole. An anti-slip pad is fixedly installed inside the fixing cavity. A turntable is mounted on the lower part of the tray. A bottom channel is formed inside the turntable. The turntable and the bottom end of the positioning column are fixedly connected.

[0010] The anti-slip mat has a storage chamber inside, which includes a bottle body. The bottle body is hollow and cylindrical. The bottom end of the bottle body is connected to the upper surface of the turntable. The top end of the bottle body is detachably installed with a top cap via a buckle. An elastic component is installed inside the bottle body. The elastic component includes a spring. One end of the spring is fixedly installed on the lower surface of the top cap via a limiting block. The other end of the spring is installed with a positioning block. A soluble coating is placed under the positioning block.

[0011] Preferably, the number of fixing cavities is several, and they are evenly arranged in a ring shape inside the tray. The bottom channel is adapted to the fixing cavity. A first fixing plate is installed inside the outer shell. The first fixing plate includes a fixing plate body. The outer periphery of the fixing plate body is fixedly connected to the inner periphery of the outer shell. A limiting groove is opened inside the fixing plate body. The turntable is engaged inside the limiting groove.

[0012] Preferably, a reaction chamber is installed at the lower part of the turntable. The reaction chamber is frustum-shaped. A support plate is installed at the bottom of the reaction chamber. An infusion assembly is installed on one side of the upper end of the support plate. The infusion assembly includes a peristaltic pump. A first water pipe is installed above the peristaltic pump. One end of the first water pipe is connected to the outlet of the peristaltic pump. The other end of the first water pipe is connected to the peripheral side of the reaction chamber. A second water pipe is installed on the side of the peristaltic pump. One end of the second water pipe is connected to the inlet of the peristaltic pump. The other end of the second water pipe passes through the peripheral side of the outer shell and extends to the outside of the outer shell. A filter assembly is installed inside the second water pipe. The filter assembly includes a filter plate. The outer peripheral surface of the filter plate is engaged with the inner peripheral surface of the second water pipe. A handle is installed at the top of the filter plate. The handle passes through the second water pipe and extends to the outside of the second water pipe.

[0013] Preferably, a motor is installed at the lower part of the support plate, and the output shaft of the motor passes through the support plate and is fixedly connected to the lower end of the reaction chamber. A detector located inside the outer shell is installed at the upper part of the support plate. A liquid guide tube is installed on the side of the detector. One end of the liquid guide tube is connected to the reaction chamber and the other end is connected to the detector. A solenoid valve is fitted outside the liquid guide tube and is located between the reaction chamber and the detector.

[0014] Preferably, a controller is installed on the inner wall of the housing, a display is installed on the outer wall of the housing, a second fixing plate located inside the housing is fixedly installed on the outer surface of the dosing assembly, and the controller is electrically connected to a servo motor, a detector, a solenoid valve, a display, and a peristaltic pump.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. A servo motor drives the turntable to rotate at preset time intervals and angles, causing the bottom channel to rotate directly below the corresponding fixed chamber. A storage chamber and elastic component are set up to push the regulator into the reaction chamber. Multiple independent chambers can pre-store different types of regulators to meet the monitoring needs of multiple scenarios. Each fixed chamber corresponds to an independent bottom channel, ensuring that only one chamber's regulator is released into the reaction chamber through the bottom channel at a time. This avoids dosage errors or cross-contamination caused by simultaneous leakage from multiple chambers, which would affect the monitoring data. Furthermore, when monitoring water quality in different areas, there is no need to manually add regulators, reducing operational complexity and errors, and improving monitoring efficiency.

[0017] 2. By setting up a filter plate, it is possible to effectively prevent mud, algae and other substances from entering the reaction chamber and interfering with optical detection, and a handle is provided to facilitate cleaning and replacement of the filter plate. Attached Figure Description

[0018] Figure 1 This utility model provides a front view of the internal structure of an online total nitrogen monitor;

[0019] Figure 2 A three-dimensional view of the internal structure of an online total nitrogen monitor is provided for this utility model;

[0020] Figure 3 A three-dimensional diagram of the regulator storage structure in an online total nitrogen monitor is provided for this utility model;

[0021] Figure 4 A three-dimensional view of the rotating disk assembly structure in an online total nitrogen monitor is provided for this utility model;

[0022] Figure 5 A three-dimensional diagram of the elastic structure in an online total nitrogen monitor is provided for this utility model;

[0023] Figure 6A partial three-dimensional view of a total nitrogen online monitoring instrument is provided for this utility model.

[0024] Legend: 1. Outer shell; 2. Dosing assembly; 201. Servo motor; 202. Positioning post; 203. Turntable assembly; 2031. Tray; 2032. Anti-slip mat; 2033. Center hole; 2034. Fixing cavity; 2035. Turntable; 2036. Bottom channel; 204. Storage cavity; 2041. Bottle body; 2042. Top cap; 205. Elastic assembly; 2051. Spring; 2052. Positioning block; 2053. 3. Soluble coating; 4. First fixing plate; 5. Fixing plate body; 6. Limiting groove; 7. Reaction chamber; 8. Support plate; 9. Infusion assembly; 10. Peristaltic pump; 11. First water infusion pipe; 12. Second water infusion pipe; 13. Filter assembly; 14. Filter plate; 15. Handle; 16. Motor; 17. Detector; 18. Liquid guide tube; 19. Solenoid valve; 10. Controller; 11. Display; 12. Second fixing plate. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can also be implemented in other ways than those described herein, and therefore the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] Example 1, such as Figures 1-5 As shown, this utility model provides an online total nitrogen monitor, which includes a housing 1 and a dosing assembly 2, wherein the dosing assembly 2 is located in the inner cavity of the housing 1 and extends to the outer end of the housing 1;

[0028] The dosing assembly 2 includes a servo motor 201, which is located at the upper end of the housing 1. The output shaft of the servo motor 201 drives a positioning column 202. A turntable assembly 203 is installed on the outside of the positioning column 202. The turntable assembly 203 includes a tray 2031, which is fitted onto the outside of the positioning column 202. A central hole 2033 is opened inside the tray 2031. The central hole 2033 is located at the center of the turntable assembly 203 and does not contact the positioning column 202. A fixing cavity 2034 is opened outside the central hole 2033 and is located inside the turntable assembly 203. An anti-slip pad 2032 is fixedly installed inside the fixing cavity 2034. A turntable 2035 is installed at the lower part of the tray 2031. A bottom channel 2036 is opened inside the turntable 2035. The turntable 2035 and the bottom end of the positioning column 202 are fixedly connected.

[0029] The anti-slip mat 2032 has a storage chamber 204 inside, which includes a bottle body 2041. The bottle body 2041 is a hollow cylinder. The bottom end of the bottle body 2041 is connected to the upper surface of the turntable 2035. The top cover 2042 is detachably installed on the upper end of the bottle body 2041 by a buckle. The bottle body 2041 has an elastic component 205 inside, which includes a spring 2051. One end of the spring 2051 is fixedly installed on the lower surface of the top cover 2042 by a limiting block. The other end of the spring 2051 is installed with a positioning block 2052. A soluble coating 2053 is placed under the positioning block 2052.

[0030] The effect achieved by the entire embodiment 1 is as follows: the servo motor 201 is started to drive the turntable 2035 to rotate step by step at a preset time interval and angle, so that the bottom channel 2036 rotates to the position directly below the corresponding fixed cavity 2034, and the regulator is pushed into the reaction chamber 4 by setting the storage cavity 204 and the elastic component 205; when monitoring the water quality of different areas, there is no need to manually add regulator, reducing the complexity of operation and error, and improving the monitoring efficiency.

[0031] Example 2, as Figure 1 , Figure 4 and Figure 6 As shown, this utility model provides an online total nitrogen monitor: the number of fixed cavities 2034 is several, and they are evenly arranged in a ring shape inside the tray 2031. The bottom channel 2036 is adapted to the fixed cavity 2034. A first fixing plate 3 is installed inside the outer shell 1. The first fixing plate 3 includes a fixing plate body 301. The outer periphery of the fixing plate body 301 is fixedly connected to the inner periphery of the outer shell 1. A limiting groove 302 is opened inside the fixing plate body 301. The turntable 2035 is snapped into the inside of the limiting groove 302.

[0032] The overall effect of Embodiment 2 is as follows: different types of regulators can be pre-stored in multiple independent cavities to meet the monitoring needs of multiple scenarios. Each fixed cavity 2034 corresponds to an independent bottom channel 2036, ensuring that only one cavity's regulator is released into the reaction chamber 4 through the bottom channel 2036 at a time, avoiding dosage errors or cross-contamination caused by simultaneous leakage from multiple cavities, which would affect the monitoring data. At the same time, the synergistic effect of the fixed plate body 301 and the limiting groove 302 restricts the radial displacement of the turntable 2035, ensuring the stability of the rotation axis and avoiding deviation in the regulator release position due to mechanical vibration.

[0033] Example 3, as Figures 1-2 and Figure 6 As shown, this utility model provides an online total nitrogen monitor: a reaction chamber 4 is installed at the lower part of the turntable 2035. The reaction chamber 4 is frustum-shaped. A support plate 5 is installed at the bottom of the reaction chamber 4. An infusion assembly 6 is installed on one side of the upper end of the support plate 5. The infusion assembly 6 includes a peristaltic pump 601. A first water infusion pipe 602 is installed above the peristaltic pump 601. One end of the first water infusion pipe 602 is connected to the outlet of the peristaltic pump 601, and the other end of the first water infusion pipe 602 is connected to the peripheral side of the reaction chamber 4. A second water infusion pipe is installed on the side of the peristaltic pump 601. Pipe 603, one end of the second water supply pipe 603 is connected to the inlet of the peristaltic pump 601, and the other end of the second water supply pipe 603 passes through the peripheral side of the outer casing 1 and extends to the outside of the outer casing 1. A filter assembly 604 is installed inside the second water supply pipe 603. The filter assembly 604 includes a filter plate 6041. The outer peripheral surface of the filter plate 6041 is engaged with the inner peripheral surface of the second water supply pipe 603. A handle 6042 is installed at the top of the filter plate 6041. The handle 6042 passes through the second water supply pipe 603 and extends to the outside of the second water supply pipe 603.

[0034] The overall effect achieved in Embodiment 3 is as follows: the structure of the reaction chamber 4 is frustum-shaped, and with the motor 7 driving its rotation, centrifugal force and eddy current effect are generated, which enables the water sample and the regulator to be mixed quickly and evenly, avoiding detection deviation caused by uneven local concentration; the water sample enters the peristaltic pump 601 through the independent second water supply pipe 603, and is directionally transported to the reaction chamber 4 through the first water supply pipe 602 to avoid backflow interference; the peristaltic pump 601 is dynamically controlled by the controller 11 to pump water at a rate that matches the rhythm of regulator addition and maintains a constant liquid level in the reaction chamber; the filter assembly 604 effectively prevents silt, algae, etc. from entering the reaction chamber and interfering with optical detection.

[0035] Example 4, as Figures 1-2As shown, this utility model provides an online total nitrogen monitor: a motor 7 is installed on the lower part of the support plate 5, and the output shaft of the motor 7 passes through the support plate 5 and is fixedly connected to the lower end of the reaction chamber 4. A detector 8 located inside the outer shell 1 is installed on the upper part of the support plate 5. A liquid guide tube 9 is installed on the side of the detector 8. One end of the liquid guide tube 9 is connected to the reaction chamber 4, and the other end is connected to the detector 8. A solenoid valve 10 is fitted on the outside of the liquid guide tube 9. The solenoid valve 10 is located between the reaction chamber 4 and the detector 8. A controller 11 is installed on the inner wall of the outer shell 1, and a display 12 is installed on the outer wall of the outer shell 1. A second fixing plate 13 located inside the outer shell 1 is fixedly installed on the outer surface of the dosing assembly 2. The controller 11 is electrically connected to the servo motor 201, the detector 8, the solenoid valve 10, the display 12, and the peristaltic pump 601.

[0036] The overall effect of embodiment 4 is as follows: the output shaft of motor 7 passes through support plate 5, which ensures precise alignment of the rotation axis, reduces the interference of mechanical vibration on the monitoring process, and improves the reliability of long-term operation; the controller 11 centrally controls servo motor 201, detector 8, solenoid valve 10, display 12 and peristaltic pump 601, realizing fully automated control and efficient data management, which significantly improves the accuracy, stability and ease of operation of total nitrogen monitoring.

[0037] The working principle of the entire device is as follows: Water sample input and filtration stage: External water sample enters the device through the second water supply pipe 603. The filter component 604 in the pipeline pre-treats the water sample. The filter plate 6041 intercepts suspended solids such as mud and algae. The peristaltic pump 601 draws water sample through the second water supply pipe 603 and transports it to the reaction chamber 4 through the first water supply pipe 602.

[0038] Reaction stage: The servo motor 201 is started, and its output shaft drives the positioning column 202 to drive the turntable 2035 to rotate step by step at a preset time interval and angle. The tray 2031 has multiple fixed cavities 2034 inside. Each fixed cavity 2034 is connected to the reaction chamber 4 through the bottom channel 2036. When the servo motor 201 drives the bottom channel 2036 to rotate directly below a certain fixed cavity 2034, the spring 2051 inside the bottle 2041 is released due to the compression force. Under the action of elastic force, the soluble coating 2053 is pushed through the positioning block 2052 to release the regulator into the reaction chamber 4. The structure of the reaction chamber 4 is frustum-shaped, wider at the top and narrower at the bottom. With the rotation driven by the motor 7, centrifugal force and vortex effect are formed to make the water sample and regulator fully mixed and avoid local uneven concentration.

[0039] Detection stage: After the water sample and conditioning agent in the reaction chamber 4 are completely mixed, the solenoid valve 10 is opened by the controller 11, and the liquid in the reaction chamber 4 is introduced into the detector 8 through the liquid guide tube 9 for optical detection. After the detection is completed, the controller 11 converts the signal into a total nitrogen concentration value and displays the detection result in real time through the external display 12.

[0040] Reset and preparation for the next cycle: Only after the detection data is fully displayed on the display 12 will the digestion solution in the detector 8 be discharged from the pipe at its rear end. At this time, the servo motor 201 will receive the instruction to drive the bottom channel 2036 to rotate directly below the next fixed cavity 2034, ensuring that each monitoring is independent and free from cross-contamination. The filter plate 6041 can be pulled out from the second water supply pipe 603 through the handle 6042 for cleaning and replacement.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An online total nitrogen monitor, comprising a housing (1) and a dosing assembly (2), characterized in that: The dosing assembly (2) is located in the inner cavity of the outer shell (1) and extends to the outer end of the outer shell (1); The dosing assembly (2) includes a servo motor (201), which is located at the upper end of the outer casing (1). The output shaft of the servo motor (201) drives a positioning column (202). A turntable assembly (203) is installed outside the positioning column (202). The turntable assembly (203) includes a tray (2031), which is fitted onto the outside of the positioning column (202). A central hole (2033) is provided inside the tray (2031). 3) Located at the center of the turntable assembly (203) and not in contact with the positioning post (202), the center hole (2033) has a fixed cavity (2034) located inside the turntable assembly (203) on its outside. An anti-slip pad (2032) is fixedly installed inside the fixed cavity (2034). A turntable (2035) is installed on the lower part of the tray (2031). A bottom channel (2036) is opened inside the turntable (2035). The bottom end of the turntable (2035) and the positioning post (202) are fixedly connected. The anti-slip mat (2032) has a storage chamber (204) inside. The storage chamber (204) includes a bottle body (2041). The bottle body (2041) is a hollow cylinder. The bottom end of the bottle body (2041) is connected to the upper surface of the turntable (2035). The top end of the bottle body (2041) is detachably installed with a top cover (2042) by a buckle. The bottle body (2041) has an elastic component (205) inside. The elastic component (205) includes a spring (2051). One end of the spring (2051) is fixedly installed on the lower surface of the top cover (2042) by a limiting block. The other end of the spring (2051) is installed with a positioning block (2052). A soluble coating (2053) is placed under the positioning block (2052).

2. The total nitrogen online monitoring instrument according to claim 1, characterized in that: The number of fixed cavities (2034) is several, and they are evenly arranged in a ring shape inside the tray (2031). The bottom channel (2036) is adapted to the fixed cavity (2034).

3. The total nitrogen online monitoring instrument according to claim 1, characterized in that: The first fixing plate (3) is installed inside the outer shell (1). The first fixing plate (3) includes a fixing plate body (301). The outer periphery of the fixing plate body (301) is fixedly connected to the inner periphery of the outer shell (1). A limiting groove (302) is opened inside the fixing plate body (301). The turntable (2035) is engaged inside the limiting groove (302).

4. The total nitrogen online monitoring instrument according to claim 1, characterized in that: A reaction chamber (4) is installed at the lower part of the turntable (2035). The reaction chamber (4) is frustum-shaped. A support plate (5) is installed at the bottom of the reaction chamber (4). An infusion assembly (6) is installed on one side of the upper end of the support plate (5). The infusion assembly (6) includes a peristaltic pump (601). A first water pipe (602) is installed above the peristaltic pump (601). One end of the first water pipe (602) is connected to the outlet of the peristaltic pump (601), and the other end of the first water pipe (602) is connected to the peripheral side of the reaction chamber (4). A second water pipe (603) is installed on the side of the peristaltic pump (601). One end of the second water supply pipe (603) is connected to the inlet of the peristaltic pump (601), and the other end of the second water supply pipe (603) passes through the peripheral side of the outer shell (1) and extends to the outside of the outer shell (1). A filter assembly (604) is installed inside the second water supply pipe (603). The filter assembly (604) includes a filter plate (6041). The outer peripheral surface of the filter plate (6041) is engaged with the inner peripheral surface of the second water supply pipe (603). A handle (6042) is installed at the top of the filter plate (6041). The handle (6042) passes through the second water supply pipe (603) and extends to the outside of the second water supply pipe (603).

5. The total nitrogen online monitoring instrument according to claim 4, characterized in that: A motor (7) is installed on the lower part of the support plate (5), and the output shaft of the motor (7) passes through the support plate (5) and is fixedly connected to the lower end of the reaction chamber (4).

6. The total nitrogen online monitoring instrument according to claim 5, characterized in that: The upper part of the support plate (5) is equipped with a detector (8) located inside the outer shell (1). A liquid guide tube (9) is installed on the side of the detector (8). One end of the liquid guide tube (9) is connected to the reaction chamber (4), and the other end is connected to the detector (8). A solenoid valve (10) is fitted on the outside of the liquid guide tube (9). The solenoid valve (10) is located between the reaction chamber (4) and the detector (8).

7. The total nitrogen online monitoring instrument according to claim 1, characterized in that: The inner wall of the outer shell (1) is equipped with a controller (11), the outer wall of the outer shell (1) is equipped with a display (12), the outer surface of the dosing assembly (2) is fixedly equipped with a second fixing plate (13) located inside the outer shell (1), and the controller (11) is electrically connected to a servo motor (201), a detector (8), a solenoid valve (10), a display (12), a peristaltic pump (601) and a motor (7).

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