An ammonia nitrogen water quality monitoring instrument

Abstract

This utility model relates to the technical field of water quality monitoring instruments, and in particular to an ammonia nitrogen water quality monitoring instrument. It improves work efficiency by automatically converting and sampling multiple water samples using a push-pull structure. The instrument includes a housing, a peristaltic pump, and a water quality analysis unit. It also includes a tray, a sampling tube, an air extraction tube, a piston cylinder, a piston, and a push rod. The tray is installed in the lower part of the monitoring chamber of the housing and is used to hold multiple water samples. The output end of the sampling tube is connected to the input end of the peristaltic pump, and the input end of the sampling tube is located above the tray. The output end of the air extraction tube is connected to the input end of the peristaltic pump, and the input end of the air extraction tube extends into the upper end of the piston cylinder. The piston cylinder is installed in the lower part of the monitoring chamber, and the piston is slidably installed inside the piston cylinder. The lower end of the push rod is connected to the piston, and the upper end of the push rod extends above the piston cylinder. The push rod is located below the input end of the sampling tube and is used to push the water sample upwards, causing the sampling tube to insert into the water sample.

Description

Technical Field

[0001] This utility model relates to the technical field of water quality monitoring instruments, and in particular to an ammonia nitrogen water quality monitoring instrument. Background Technology

[0002] Excessive ammonia nitrogen content in water can lead to the uncontrolled growth of aquatic plants such as algae, affecting not only waterways but also crowding out other aquatic species and disrupting the ecological balance. Therefore, wastewater needs to be tested using an automatic ammonia nitrogen water quality monitor before discharge. This monitor contains essential components such as a metering tube, a peristaltic pump, and a digestion cup, enabling the detection of ammonia nitrogen in wastewater. Chinese utility model patent CN216525765U discloses an automatic ammonia nitrogen water quality monitor. Internally, the monitor has a mounting plate connected by threads. A metering tube, a peristaltic pump, and a digestion cup are mounted on one outer wall of the mounting plate. A bracket is welded to one outer wall of the mounting plate, with the metering tube located at the top of the bracket. A fixing knob is located at the top of the metering tube, comprising a semi-circular disc. A handle is integrally formed on one outer wall of the semi-circular disc, and a cam is integrally formed on another outer wall of the semi-circular disc. A connecting shaft is welded to one outer wall of the cam, and one end of the connecting shaft passes through the mounting plate and is welded with a baffle. This utility model uses a bracket and a fixing knob to support the metering tube of an automatic water quality monitor. When the semi-circular disc and cam of the fixing knob rotate, they can respectively block and squeeze the metering tube to fix it, thus achieving the effect of convenient installation and disassembly of the metering tube of the automatic water quality monitor.

[0003] The existing water quality monitoring instruments can be loaded with multiple water samples and can monitor the water quality of multiple water samples. However, the water quality monitoring instruments do not have a lifting component for water samples, which makes it impossible to automatically switch between multiple water samples and automatically sample and monitor them, resulting in low work efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an ammonia nitrogen water quality monitor that improves work efficiency by setting a top-pushing structure to automatically convert and automatically sample and monitor multiple water quality samples.

[0005] This utility model discloses an ammonia nitrogen water quality monitor, comprising a housing, a peristaltic pump, and a water quality analysis unit. The housing contains a monitoring chamber, and a door at the front of the housing communicates with the monitoring chamber. The peristaltic pump and the water quality analysis unit are installed in the upper part of the monitoring chamber. The output end of the peristaltic pump is connected to the monitoring end of the water quality analysis unit via a pipeline. The monitor also includes a tray, a sampling tube, an air extraction tube, a piston cylinder, a piston, and a push rod. The tray is installed in the lower part of the monitoring chamber and is used to hold multiple water samples. The output end of the sampling tube is connected to the input end of the peristaltic pump, and the input end of the sampling tube is located above the tray. The output end of the air extraction tube is connected to the input end of the peristaltic pump and extends into the upper end of the piston cylinder. The piston cylinder is installed in the lower part of the monitoring chamber, and the piston is slidably installed inside the piston cylinder. The lower end of the push rod is connected to the piston, and the upper end of the push rod extends above the piston cylinder. The push rod is located below the input end of the sampling tube and is used to push the water sample upwards, causing the sampling tube to insert into the water sample. During operation, multiple samples are collected. Water samples are loaded onto a tray, with the inlet of the sampling tube positioned above the sample. A peristaltic pump operates, drawing air through the sampling and extraction tubes. The extraction tube removes air from the piston cylinder, causing the piston to move upwards under atmospheric pressure. This pushes the push rod upwards, elevating the water sample on the tray. The sampling tube then extends into the water sample, drawing water into the peristaltic pump. The water is then fed into the water quality analysis unit for ammonia nitrogen analysis, thus monitoring the water sample. After sampling and monitoring, the peristaltic pump stops, and air is introduced into the piston cylinder through the extraction tube, causing the piston and push rod to descend and reset. This allows the sampling tube to be extracted from the water sample. The tray then moves to bring the next water sample below the sampling tube and piston cylinder. This process is repeated for each water sample until all samples have been monitored, improving efficiency.

[0006] Preferably, the system also includes a valve body, a conical sealing surface, and a sealing ball. The valve body is mounted on the sampling tube, and a cavity is provided inside the valve body. A conical sealing surface is provided at the bottom of the cavity of the valve body, and the sealing ball is movably installed in the cavity of the valve body, blocking the connection between the cavity of the valve body and the input end of the sampling tube. At this time, the peristaltic pump works, and the air inside the piston cylinder is extracted through the air extraction tube, causing the piston and push rod to rise. During this process, the sealing ball blocks the input port at the bottom of the cavity of the valve body under the action of gravity, thereby improving the rising efficiency of the piston and push rod. When the piston is raised to the correct position, the peristaltic pump continues to work, and a negative pressure is formed in the cavity of the valve body. The negative pressure causes the water sample to enter the cavity of the valve body through the sampling tube, pushing the sealing ball up and separating it from the conical sealing surface, so that the water sample is drawn into the peristaltic pump and the water quality analysis unit through the sampling tube. After the water sample monitoring is completed, the peristaltic pump stops, and the sealing ball falls to block the sampling tube, preventing residual water sample from contaminating the next water quality sample.

[0007] Preferably, it also includes a sample tube and a retaining ring. The tray is provided with multiple insertion holes, and the sample tube is movably inserted into the insertion holes of the tray. The upper end of the sample tube is provided with an outwardly protruding retaining ring. The sample tube is used to load water quality samples. Multiple sample tubes are movably inserted into multiple insertion holes of the tray respectively. The multiple retaining rings make the sample tubes rest on the tray. The containers of multiple water quality samples are placed into multiple sample tubes respectively, making the loading of water quality samples more stable and accurate.

[0008] Preferably, the sample tube also includes a screw, a base, and a support plate. A threaded hole is provided at the bottom of the sample tube, and the screw is rotatably screwed into the threaded hole of the sample tube. A support plate is installed at the upper end of the screw, located inside the sample tube. A base is provided at the lower end of the screw, located above the push rod. The screw is rotated by the base, causing it to rise and fall under the action of the threads, which in turn drives the support plate to rise and fall. This allows the sample tube to hold containers of water quality samples of different heights. When the push rod rises, it pushes the base, pushing the sample tube upwards, thus raising the water quality sample container and improving versatility.

[0009] Preferably, it also includes a photoelectric head and multiple reflectors. The photoelectric head is installed in the lower part of the monitoring chamber of the housing, below the tray and the sampling tube. The multiple reflectors are respectively installed on multiple sample tubes, and the photoelectric head is matched with the multiple reflectors. The tray rotates intermittently under the action of the drive component. When the sample tube drives the reflector to reach above the photoelectric head, the photoelectric head receives the signal reflected by the reflector and generates an electrical signal. When the electrical signal is generated, the drive component of the tray stops and sampling begins for water quality monitoring, thereby improving the positioning accuracy of the multiple sample tubes.

[0010] Preferably, it also includes a stepper motor, a insertion shaft, and a support ring. The stepper motor is installed at the bottom of the monitoring chamber of the housing. The output shaft of the stepper motor is fitted with the insertion shaft. The bottom of the insertion shaft has an outwardly protruding support ring. The center of the tray has an insertion slot that matches the insertion shaft. Multiple insertion holes are evenly arranged around the circumference of the tray. The tray is inserted into the insertion shaft through the insertion slot. The support ring holds the tray in place. The stepper motor drives the insertion shaft to rotate intermittently, thereby rotating the tray. This allows multiple water quality samples to be automatically sampled and monitored below the sampling tube in sequence, which is convenient for installation and disassembly and improves work efficiency.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: During operation, multiple water samples are loaded onto a tray. At this time, the inlet end of the sampling tube is located above the water samples. The peristaltic pump operates to draw air through the sampling tube and the air extraction tube. The air extraction tube extracts the air above the piston cylinder, causing the piston to move upward under the action of external atmospheric pressure. This causes the piston to push the push rod upward, which in turn pushes the water samples on the tray upward, raising the water samples. This allows the inlet end of the sampling tube to extend into the water samples, allowing the water in the samples to pass through the sampling tube. The sample is drawn into a peristaltic pump and then piped into a water quality analysis unit for ammonia nitrogen content analysis, thereby monitoring the water quality sample. After sampling and monitoring are completed, the peristaltic pump stops, and air is introduced into the piston cylinder through the air extraction pipe, causing the piston and push rod to descend, thereby lowering and resetting the water quality sample, allowing the sampling tube to be extracted from the water quality sample. The tray action brings the next water quality sample to the bottom of the sampling tube and piston cylinder, and the above actions are repeated to monitor the next water quality sample until all water quality samples are monitored, improving work efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a front view structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 4 It is a structural diagram of the tray, sample cylinder, stepper motor, insert shaft, and support ring, etc.

[0016] Figure 5 It is a structural diagram of the sample cylinder, retaining ring, screw, base, tray, photoelectric head and reflector, etc.

[0017] Figure 6 It is a structural diagram of the sampling tube, the gas extraction tube, the piston cylinder, the piston, the push rod, the valve body, the conical sealing surface, and the sealing ball.

[0018] The following components are labeled in the attached diagram: 1. Housing; 2. Peristaltic pump; 3. Water quality analysis unit; 4. Tray; 5. Sampling tube; 6. Air extraction tube; 7. Piston cylinder; 8. Piston; 9. Push rod; 10. Valve body; 11. Conical sealing surface; 12. Sealing ball; 13. Sample cylinder; 14. Retaining ring; 15. Screw; 16. Base; 17. Support plate; 18. Photoelectric head; 19. Reflector; 20. Stepper motor; 21. Insert shaft; 22. Support ring. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, an ammonia nitrogen water quality monitor includes a housing 1, a peristaltic pump 2, and a water quality analysis unit 3. The housing 1 has a monitoring chamber inside, and a door communicating with the monitoring chamber is located at the front of the housing 1. The peristaltic pump 2 and the water quality analysis unit 3 are installed in the upper part of the monitoring chamber of the housing 1. The output end of the peristaltic pump 2 is connected to the monitoring end of the water quality analysis unit 3 via a pipeline. The monitor also includes a tray 4, a sampling tube 5, an air extraction tube 6, a piston cylinder 7, a piston 8, and a push rod 9. The tray 4 is installed in the lower part of the monitoring chamber of the housing 1 and is used to hold multiple water samples. The output end of the sampling tube 5 is connected to the input end of the peristaltic pump 2, and the input end of the sampling tube 5 is located above the tray 4. The output end of the air extraction tube 6 is connected to the input end of the peristaltic pump 2. The inlet end of the trachea 6 extends into the upper end of the piston cylinder 7. The piston cylinder 7 is installed in the lower part of the monitoring chamber. The piston 8 is slidably installed inside the piston cylinder 7. The lower end of the push rod 9 is connected to the piston 8, and the upper end of the push rod 9 extends above the piston cylinder 7. The push rod 9 is located below the inlet end of the sampling tube 5. The push rod 9 is used to push the water quality sample upward so that the sampling tube 5 is inserted into the water quality sample. It also includes a valve body 10, a conical sealing surface 11, and a sealing ball 12. The valve body 10 is installed on the sampling tube 5. The valve body 10 has a cavity inside. The bottom of the cavity of the valve body 10 is provided with a conical sealing surface 11. The sealing ball 12 is movably installed in the cavity of the valve body 10. The sealing ball 12 blocks the connection between the cavity of the valve body 10 and the inlet end of the sampling tube 5.

[0021] During operation, multiple water samples are loaded onto tray 4. At this time, the input end of sampling tube 5 is positioned above the water samples. Peristaltic pump 2 operates to extract air through sampling tube 5 and air extraction tube 6. Air extraction tube 6 extracts the air above the piston cylinder 7. During this process, sealing ball 12 blocks the input port at the bottom of the cavity of valve body 10 under the action of gravity, thereby improving the lifting efficiency of piston 8 and push rod 9. This causes piston 8 to move upward under the action of external atmospheric pressure, pushing push rod 9 upward. Push rod 9 pushes the water samples on tray 4 upward, raising the water samples and allowing the input end of sampling tube 5 to extend into the water samples. After piston 8 reaches its raised position, peristaltic pump 2 continues to operate, creating a negative pressure in the cavity of valve body 10. This negative pressure forces the water sample through sampling tube 5 into valve body 10. In the cavity, the sealing ball 12 is pushed up and separated from the conical sealing surface 11, so that the water in the water sample is drawn into the peristaltic pump 2 through the sampling tube 5, and then input into the water quality analysis unit 3 through the pipeline for ammonia nitrogen content analysis, thereby monitoring the water quality sample. After the sampling and monitoring is completed, the peristaltic pump 2 stops, the sealing ball 12 falls and blocks the sampling tube 5 to prevent residual water sample from contaminating the next water quality sample. Air is introduced into the interior of the piston cylinder 7 through the air extraction tube 6, causing the piston 8 and push rod 9 to descend, thereby driving the water quality sample to descend and reset, so that the sampling tube 5 is extracted from the water quality sample. The tray 4 moves to bring the next water quality sample to the bottom of the sampling tube 5 and piston cylinder 7. The above actions are repeated to monitor the next water quality sample until all water quality samples are monitored, improving work efficiency. Example 2

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, based on Embodiment 1, it also includes a sample cylinder 13 and a retaining ring 14. The tray 4 has multiple insertion holes, and the sample cylinder 13 is movably inserted into these holes. The upper end of the sample cylinder 13 has an outwardly protruding retaining ring 14. The sample cylinder 13 is used to hold water samples. It also includes a screw 15, a base 16, and a support plate 17. The bottom of the sample cylinder 13 has a threaded hole, and the screw 15 is rotatably screwed into the threaded hole of the sample cylinder 13. The upper end of the screw 15 is fitted with the support plate 17, which is located inside the sample cylinder 13. The lower end of the screw 15 has the base 16, which is located above the push rod 9. It also includes... The system includes a photoelectric head 18 and multiple reflective sheets 19. The photoelectric head 18 is installed in the lower part of the monitoring chamber of the housing 1, below the tray 4 and the sampling tube 5. The multiple reflective sheets 19 are respectively installed on multiple sample tubes 13, and the photoelectric head 18 is matched with the multiple reflective sheets 19. The system also includes a stepper motor 20, a insertion shaft 21, and a support ring 22. The stepper motor 20 is installed at the bottom of the monitoring chamber of the housing 1. The output shaft of the stepper motor 20 is fitted with the insertion shaft 21. The bottom of the insertion shaft 21 is provided with an outwardly protruding support ring 22. The center of the tray 4 is provided with an insertion slot that matches the insertion shaft 21. Multiple insertion holes are evenly arranged around the circumference of the tray 4.

[0023] Rotating the screw 15 via the base 16 causes the screw 15 to rise and fall under the action of the thread, which in turn drives the tray 17 to rise and fall, allowing the sample cylinder 13 to load containers of water quality samples of different heights, thus improving versatility; multiple sample cylinders 13 are respectively movably inserted into multiple holes in the tray 4, and multiple retaining rings 14 are used to place the sample cylinders 13 on the tray 4, so that multiple containers of water quality samples can be placed into multiple sample cylinders 13, making the loading of water quality samples more stable and accurate;

[0024] The tray 4 is inserted into the insert shaft 21 through the insertion slot. The support ring 22 holds the tray 4 for easy installation and disassembly. The stepper motor 20 drives the insert shaft 21 to rotate intermittently, thereby rotating the tray 4. This allows multiple water quality samples to be automatically sampled and monitored below the sampling tube 5 in sequence. When the sample tube 13 drives the reflector 19 to the top of the photoelectric head 18, the photoelectric head 18 receives the signal reflected by the reflector 19 and generates an electrical signal. The stepper motor 20 pauses when the push rod 9 rises, pushing the base plate 16 to push the sample tube 13 upward, causing the sample tube 13 to lift the water quality sample container and start sampling for water quality monitoring.

[0025] like Figures 1 to 6As shown, this utility model discloses an ammonia nitrogen water quality monitor. During operation, multiple water samples are first placed into multiple sample cylinders 13. At this time, the input end of the sampling tube 5 is positioned above the water samples. Then, the peristaltic pump 2 operates, drawing air through the sampling tube 5 and the air extraction tube 6. The air extraction tube 6 extracts the air from the top of the piston cylinder 7, causing the piston 8 to move upwards under atmospheric pressure. This causes the piston 8 to push the push rod 9 upwards, which in turn pushes the water sample on the tray 4 upwards, raising the water sample level. This allows the input end of the sampling tube 5 to extend into the water sample, and then the water in the sample is drawn into the peristaltic pump 2 through the sampling tube 5. In pump 2, the ammonia nitrogen content is then analyzed in water quality analysis unit 3 through pipeline, thereby monitoring the water quality sample. After sampling and monitoring are completed, peristaltic pump 2 stops, and air is introduced into the piston cylinder 7 through air extraction pipe 6, causing piston 8 and push rod 9 to descend, thereby driving the water quality sample to descend and reset, so that sampling tube 5 is extracted from the water quality sample. Finally, stepper motor 20 drives insertion shaft 21 to rotate intermittently, thereby driving tray 4 to rotate, so that multiple water quality samples are successively brought to the bottom of sampling tube 5 and piston cylinder 7. The above actions are repeated to monitor the next water quality sample until all water quality samples are monitored.

[0026] The main functions achieved by this utility model are:

[0027] 1. By setting up a top-pushing structure, multiple water quality samples can be automatically converted and automatically sampled for monitoring, thereby improving work efficiency;

[0028] 2. By setting the valve body 10, the conical sealing surface 11 and the sealing ball 12, the one-way shut-off function is realized, the lifting efficiency of the piston 8 and the push rod 9 is improved, and the residual water sample is prevented from contaminating the next water quality sample.

[0029] 3. It is a container that can hold water samples at different heights and has good versatility.

[0030] The ammonia nitrogen water quality monitor of this utility model uses common mechanical methods for installation, connection, or setting. Any method that achieves the desired beneficial effect can be implemented. The components of the ammonia nitrogen water quality monitor, including the housing 1, peristaltic pump 2, water quality analysis unit 3, tray 4, sampling tube 5, air extraction tube 6, piston cylinder 7, piston 8, push rod 9, valve body 10, conical sealing surface 11, sealing ball 12, sample cylinder 13, screw 15, support plate 17, photoelectric head 18, reflector 19, and stepper motor 20, are commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An ammonia nitrogen water quality monitor, comprising a housing (1), a peristaltic pump (2), and a water quality analysis unit (3), wherein a monitoring chamber is provided inside the housing (1), and a door communicating with the monitoring chamber is provided at the front of the housing (1), the peristaltic pump (2) and the water quality analysis unit (3) are installed on the upper part of the monitoring chamber of the housing (1), and the output end of the peristaltic pump (2) is connected to the monitoring end of the water quality analysis unit (3) through a pipeline; characterized in that, It also includes a tray (4), a sampling tube (5), an air extraction tube (6), a piston cylinder (7), a piston (8), and a push rod (9). The tray (4) is installed in the lower part of the monitoring chamber of the housing (1). The tray (4) is used to load multiple water quality samples. The output end of the sampling tube (5) is connected to the input end of the peristaltic pump (2). The input end of the sampling tube (5) is located above the tray (4). The output end of the air extraction tube (6) is connected to the input end of the peristaltic pump (2). The input end of the air extraction tube (6) extends into the upper end of the piston cylinder (7). The piston cylinder (7) is installed in the lower part of the monitoring chamber. The piston (8) is slidably installed inside the piston cylinder (7). The lower end of the push rod (9) is connected to the piston (8). The upper end of the push rod (9) extends out above the piston cylinder (7). The push rod (9) is located below the input end of the sampling tube (5). The push rod (9) is used to push the water quality sample upward so that the sampling tube (5) is inserted into the water quality sample.

2. The ammonia nitrogen water quality monitor as described in claim 1, characterized in that, It also includes a valve body (10), a conical sealing surface (11) and a sealing ball (12). The valve body (10) is installed on the sampling tube (5). A cavity is provided inside the valve body (10). A conical sealing surface (11) is provided at the bottom of the cavity of the valve body (10). The sealing ball (12) is movably installed in the cavity of the valve body (10). The sealing ball (12) blocks the connection between the cavity of the valve body (10) and the input end of the sampling tube (5).

3. The ammonia nitrogen water quality monitor as described in claim 1, characterized in that, It also includes a sample tube (13) and a retaining ring (14). Multiple insertion holes are provided on the tray (4). The sample tube (13) is movably inserted into the insertion holes of the tray (4). The upper end of the sample tube (13) is provided with an outwardly protruding retaining ring (14). The sample tube (13) is used to load water quality samples.

4. The ammonia nitrogen water quality monitor as described in claim 3, characterized in that, It also includes a screw (15), a base plate (16) and a support plate (17). The bottom of the sample tube (13) is provided with a threaded hole. The screw (15) is rotatably screwed into the threaded hole of the sample tube (13). The upper end of the screw (15) is equipped with a support plate (17), which is located inside the sample tube (13). The lower end of the screw (15) is provided with a base plate (16), which is located above the push rod (9).

5. The ammonia nitrogen water quality monitor as described in claim 3, characterized in that, It also includes a photoelectric head (18) and multiple reflective plates (19). The photoelectric head (18) is installed in the lower part of the monitoring chamber of the housing (1). The photoelectric head (18) is located below the tray (4) and the sampling tube (5). Multiple reflective plates (19) are installed on multiple sample tubes (13) respectively. The photoelectric head (18) is matched with multiple reflective plates (19).

6. The ammonia nitrogen water quality monitor as described in claim 3, characterized in that, It also includes a stepper motor (20), a plug shaft (21) and a support ring (22). The stepper motor (20) is installed at the bottom of the monitoring chamber of the housing (1). The output shaft of the stepper motor (20) is installed with the plug shaft (21). The bottom of the plug shaft (21) is provided with an outwardly protruding support ring (22). The middle part of the tray (4) is provided with a plug slot that matches the plug shaft (21). Multiple plug holes are evenly arranged around the circumference of the tray (4).

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