Multi-parameter water quality on-line detection analyzer

Abstract

The utility model discloses a multi-parameter water quality on-line detection analyzer, which belongs to the technical field of water quality detection, and comprises a box body, a total phosphorus detection system and a water sample collection and detection system, the interior of the box body is divided into an upper layer cavity and a lower layer cavity by a horizontal partition plate; the total phosphorus detection system comprises a mounting back plate and a plurality of matched detection components for detecting the total phosphorus of a water sample; the mounting back plate divides the upper-layer cavity into an upper-layer front-side cavity and an upper-layer rear-side cavity; the water sample collection and detection system comprises a water sample collection pipeline, a plurality of water quality detection sensors and a water quality sampling port, and the water quality sampling port is communicated with the detection component and supplies a water sample; a plurality of reagent bottles containing different solutions are placed in the cavity on the rear side of the upper layer, and the detection component can selectively extract reagents in the reagent bottles for calibration, detection or automatic cleaning. The device is high in automation degree, can detect total phosphorus and other physical and chemical indexes of water on line in real time, and meets the detection requirements of various water samples.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to a multi-parameter water quality online detection analyzer. Background Art

[0002] At present, the water quality testing devices used by enterprises or environmental protection units are mostly relatively simple. They cannot analyze and test the quality of water at one time. They need to manually add test liquid, shake it manually, and put it into the designated position manually. The whole set of testing methods requires a large workload, increases manual operation costs, and reduces the economic benefits of the enterprise. In addition, manual color confirmation is required, which leads to large errors and low water quality testing efficiency.

[0003] Chinese patent CN107677667A discloses "automatic water quality detection and analysis device". The technical solution includes a machine body, a material transport track is provided in the machine body, a sample placement bottle is provided on the material transport track, a detection liquid adder is installed above the sample placement bottle, a clamping claw is provided on the right side of the sample placement bottle, a heating plate is installed on the right side of the clamping claw, an auxiliary agent adder is provided above the heating plate, and a color discriminator is provided on the side of the heating plate. The sample placement bottle is transported to the position detector through the transport track, the detection liquid adder adds liquid, the clamping claw clamps the sample placement bottle, the shaking motor shakes it to reduce personnel costs, the rotating motor rotates, the sample placement bottle moves to the heating plate through the transport track, the auxiliary agent adder adds, and finally the color discriminator is displayed through the display screen. The whole device is convenient and fast, and the detection liquid is automatically added, making the addition accuracy more accurate, reducing the workload, increasing the economic benefits of the enterprise, and improving the detection quality of water quality. Although this technical solution has improved the automation level of water sample detection through structural improvements, its detection function is relatively simple and its automation level needs to be further improved. In addition, using mechanical methods to improve automation will also lead to an increase in the complexity of the mechanical structure and increase the maintenance cost of the equipment. Utility Model Content

[0004] Technical problem to be solved: In view of the problems that the existing water quality monitoring equipment has a relatively single number of detections, cumbersome operation and cumbersome maintenance, the utility model provides a multi-parameter water quality online detection analyzer with a high degree of automation. It can detect total phosphorus and other physical and chemical indicators of water quality in real time online to meet the detection needs of various water samples.

[0005] Technical solution: The utility model discloses a multi-parameter water quality online detection analyzer, which includes:

[0006] A box body, wherein the box body is divided into an upper cavity and a lower cavity by a horizontal partition, and an upper electrical door and a lower electrical door are hingedly connected to the upper cavity and the lower cavity respectively on the front side of the box body;

[0007] A total phosphorus detection system, the total phosphorus detection system comprising a mounting back plate and a plurality of matching detection components integrated on the mounting back plate for detecting total phosphorus in a water sample; the mounting back plate is placed in the upper cavity to separate the upper cavity into an upper front cavity and an upper rear cavity corresponding to the front and rear;

[0008] A water sample collection and detection system, which is correspondingly arranged in the lower cavity; the water sample collection and detection system comprises a water sample collection pipeline, a plurality of water quality detection sensors sequentially connected to the water sample collection pipeline, and a water quality sampling port, the inlet end of the water sample collection pipeline is connected to an external water source, and the water quality sampling port is connected to the detection component and supplies water samples;

[0009] Among them, a number of reagent bottles containing different solutions are placed in the upper rear side cavity, and the detection component can selectively extract reagents from the reagent bottles for calibration, detection or automatic cleaning.

[0010] Preferably, the detection components include a peristaltic pump, a detection cell, a valve island, and a metering mechanism;

[0011] The inlet end of the peristaltic pump is connected to the air, and the outlet end is connected to the inlet end of the metering mechanism. The peristaltic pump compresses the hose or pipe to generate peristalsis inside to push or extract the liquid to the target position;

[0012] The common end at the top of the valve island is connected to the outlet end of the metering mechanism, the common end on the right side of the valve island is respectively connected to the inlet and outlet ends of the detection pool, the left port of the valve island is respectively connected to the water quality sampling port and several reagent bottles, and the common end at the bottom of the valve island is connected to the waste liquid bottle through a delivery pipeline; a pipeline connection port corresponding to the valve island is provided on one side of the box body.

[0013] Preferably, the reagent bottles include a standard sample reagent bottle, a pure water reagent bottle and a reaction reagent bottle which are sequentially connected to the valve island.

[0014] Preferably, a peristaltic pump motor and a peristaltic pump driver are fixedly mounted on the back side of the mounting back plate, a driving shaft of the peristaltic pump motor passes through the mounting back plate and is transmission-connected to the peristaltic pump, and the peristaltic pump motor is connected to the peristaltic pump driver.

[0015] Preferably, the detection pool comprises a support frame with front and rear sides open, and a front cover plate and a rear cover plate correspondingly sealed and connected to the front and rear sides of the support frame; at least one cooling fan is arranged on the rear cover plate;

[0016] A detection tube is arranged between the upper and lower end plates of the support frame, and sealing columns are arranged at the upper and lower ends of the detection tube, respectively, and the sealing columns are fixedly connected to the support frame through fixing nuts;

[0017] The two side plates of the support frame are provided with detection light source transmitting ends and detection light source receiving ends, and through holes for light to pass through are opened on both sides of the support frame;

[0018] The detection light source emitting end emits light that passes through the detection tube, and the detection light source receiving end receives the light to measure the absorbance of the digested solution.

[0019] Preferably, a heating wire is wound around the surface of the detection tube, and the heating wire is connected to the heating wire assembly through a wire passing through the mounting back plate, and a temperature sensor is also provided on one side of the detection tube.

[0020] Preferably, the metering mechanism comprises a metering frame and a metering tube longitudinally arranged in the metering frame, the upper end of the metering tube is connected to the peristaltic pump through a pipeline, and the lower end of the metering tube is connected to one of the pipeline interfaces of the valve island through a pipeline;

[0021] A high-position light source transmitting end and a high-position light source receiving end, a low-position light source transmitting end and a low-position light source receiving end are respectively arranged on both sides of the upper and lower ends of the metering tube.

[0022] Preferably, the water quality detection sensor includes a turbidity sensor, a pH sensor, an ammonia nitrogen sensor and a COD sensor which are sequentially arranged along the water sample collection pipeline;

[0023] The inlet end of the water sample collection pipeline is provided with a water inlet ball valve, and the inlet end of the water sample collection pipeline is connected to an overflow branch pipe and an overflow ball valve connected to the outlet end of the overflow branch pipe;

[0024] The water sample collection pipeline is located between the turbidity sensor and the pH sensor and is connected with a Y-type filter;

[0025] The water quality sampling port is correspondingly arranged at the drainage port of the water sample collection pipeline.

[0026] Preferably, a signal transmission panel is provided on the side wall of the box, and the signal transmission panel is provided with a 220V power input terminal including a switch and fuse protection, a USB socket interface, a Micro-USB interface for debugging the control circuit, a 485 interface, a 232 interface for signal output and a self-priming pump socket for controlling an external self-priming pump.

[0027] Preferably, a touch screen is provided at the top of the upper electrical door, and an observation window is provided at the bottom of the upper electrical door; the upper electrical door and the lower electrical door are respectively provided with a buckle lock on the side away from the hinge part;

[0028] The side wall of the upper cavity is provided with air holes and a ventilation fan;

[0029] Lifting handles are correspondingly arranged on both sides of the box body.

[0030] Compared with the prior art, the utility model has at least the following beneficial effects:

[0031] 1. The analyzer of the utility model includes multiple water quality detection sensors, reaction detection units, data acquisition devices, data processing units, display screens and other components, which can detect various physical and chemical indicators of water samples in real time, such as the temperature, pH value, COD, ammonia nitrogen, turbidity and other indicators of water samples, and automatically alarm or automatically control according to preset thresholds;

[0032] 2. The water sample collection and detection system uses multiple water quality detection sensors as the core detection components of the water quality indicators of the analyzer, such as pH sensor, COD sensor, turbidity sensor, turbidity sensor, etc., which can measure water quality indicators through electrochemical, optical, ion selection and other methods to meet the detection needs of various water quality indicators; the total phosphorus detection system uses chemical methods for detection, and uses chemical reagents to use spectrophotometry to detect total phosphorus in water samples;

[0033] 3. The analyzer adopts advanced automatic calibration and automatic cleaning functions, which can automatically perform reference calibration and self-cleaning processing, so that the stability and accuracy of the analyzer are effectively guaranteed; at the same time, the analyzer is also equipped with a complete data processing and alarm device, which monitors data in real time and sends alarm information in time when the total nitrogen in water quality reaches the warning value, reminding the operator to take corresponding measures, effectively ensuring the safety and stability of water quality;

[0034] 4. The analyzer can realize online real-time detection of water quality efficiently, accurately and reliably, and has broad application prospects. It has important application value in the fields of water quality monitoring, environmental protection, water resources management, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of the analyzer of the utility model from the first perspective;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the analyzer from the second perspective;

[0037] Figure 3 for Figure 1 Main view of the device installation structure on the middle installation backplane;

[0038] Figure 4 for Figure 1 Main view of the signal transmission panel structure;

[0039] Figure 5 for Figure 3 Schematic diagram of the structure of the detection pool from the first perspective;

[0040] Figure 6 for Figure 5Schematic diagram of the structure of the middle detection pool from the second perspective;

[0041] Figure 7 for Figure 5 Main view of the internal structure of the detection pool;

[0042] Figure 8 for Figure 3 Main view of the structure of the middle metering mechanism;

[0043] Fig. 9 for Figure 1 Main view of the structure of the water sample collection and detection system;

[0044] Fig.10 for Figure 1 Schematic diagram of the reagent bottle structure in the rear cavity of the upper middle layer.

[0045] Figure numerals: 100, analyzer; 1, box; 101, horizontal partition; 102, upper front cavity; 103, lower cavity; 104, first through slot; 105, upper rear cavity; 106, second through slot; 2, upper electrical door; 3, touch screen; 4, buckle lock; 5, observation window; 6, hinge joint; 7, installation back plate; 8, signal transmission panel; 801, 220V power input terminal; 802, USB socket interface; 803, Micro-usb interface; 804, 485 interface; 805, 232 interface; 806, self-priming pump socket; 9, lifting handle; 10, pipeline connection port; 11, air vent; 12, rotating lock; 13, peristaltic pump; 14, detection pool; 141, support frame; 142, front cover; 143, rear cover; 144, cooling fan; 145, detection tube; 1 46. ​​Sealing column; 147. Fixing nut; 148. Detection light source transmitting end; 149. Detection light source receiving end; 15. Valve island; 16. Measuring mechanism; 161. Measuring frame; 162. Measuring tube; 163. High-position light source transmitting end; 164. High-position light source receiving end; 165. Low-position light source transmitting end; 166. Low-position light source receiving end; 17. Lower electrical door; 18. Water sample collection and detection system; 181. Water sample collection pipeline; 182. Water inlet ball valve; 183. Overflow ball valve; 184. Turbidity sensor; 185. Y-type filter; 186. pH sensor; 187. Ammonia nitrogen sensor; 188. COD sensor; 189. Water quality sampling port; 1810. Drain port; 19. Ventilation fan; 20. Standard sample reagent bottle; 21. Pure water reagent bottle; 22. Reaction reagent bottle; 23. Waste liquid bottle. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the utility model clearer, the following will be combined with the attached Figures 1 to 10The technical solution of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0047] like Figure 1~2 In the illustrated embodiment, the utility model discloses a multi-parameter water quality online detection analyzer, the analyzer 100 includes a housing 1, a total phosphorus detection system, a water sample collection and detection system 18, the housing 1 is divided into an upper cavity and a lower cavity 103 by a horizontal partition 101, and the front side of the housing 1 is hinged with an upper electrical door 2 and a lower electrical door 17 corresponding to the upper cavity and the lower cavity 103, respectively, a touch screen 3 is provided on the top of the upper electrical door 2, and an observation window 5 is provided on the bottom of the upper electrical door 2, and the observation window 5 is made of transparent glass or acrylic board; one side of the upper electrical door 2 and the lower electrical door 17 are respectively hingedly connected to the housing 1 through a hinge part, and the upper electrical door 2 and the lower electrical door 17 are respectively provided with a buckle 4 on the side away from the hinge part, and the upper electrical door 2 and the lower electrical door 17 can be fixedly locked with the housing 1 by the buckle 4. The side walls of the upper cavity are provided with air holes 11 and ventilation fans 19; specifically, the lower part of both side walls of the upper cavity is provided with air holes 11, and one, two, or even more ventilation fans 19 are provided on the upper part of both side walls of the upper cavity to realize forced ventilation inside the box 1. Lifting handles 9 are provided on both sides of the box 1, and the analyzer 100 can be moved and transported by the lifting handles 9. Universal wheels are provided at the four corners of the bottom of the box 1.

[0048] like Figures 1 to 3As shown, the total phosphorus detection system includes a mounting back plate 7 and a plurality of coordinated detection components integrated on the mounting back plate 7 for detecting total phosphorus in water samples; the mounting back plate 7 is placed in the upper cavity to divide the upper cavity into an upper front cavity 102 and an upper rear cavity 105 corresponding to each other, a hinge joint 6 connected to the inner wall of the upper cavity is provided on one side of the mounting back plate 7, and a rotary lock 12 is provided on the side of the mounting back plate 7 away from the hinge joint 6, and opening the rotary lock 12 can drive the mounting back plate 7 to open outward along the hinge joint 6, thereby realizing the connection between the upper front cavity 102 and the upper rear cavity 105. The detection components include a peristaltic pump 13, a detection cell 14, a valve island 15, and a metering mechanism 16. The inlet end of the peristaltic pump 13 is connected to the air, and the outlet end thereof is connected to the inlet end of the metering mechanism 16. The peristaltic pump 13 compresses the hose or pipe to generate peristalsis inside it to push or extract the liquid to the target position. A peristaltic pump motor (not shown in the figure) and a peristaltic pump driver (not shown in the figure) are fixedly installed on the back side of the mounting back plate 7. The driving shaft of the peristaltic pump motor passes through the mounting back plate 7 and is transmission-connected to the peristaltic pump 13, and the peristaltic pump motor is connected to the peristaltic pump driver. By controlling the peristaltic pump driver, the peristaltic pump motor can be controlled to start and drive the rotation of the peristaltic pump 13. The common end at the top of the valve island 15 is connected to the outlet end of the metering mechanism 16, the common end on the right side of the valve island 15 is respectively connected to the inlet and outlet ends of the detection pool 14, the left port of the valve island 15 is respectively connected to the water quality sampling port 189 and multiple reagent bottles, and the common end at the bottom of the valve island 15 is connected to the waste liquid bottle 23 through a delivery pipeline; a pipeline connection port 10 corresponding to the valve island 15 is provided on one side of the box.

[0049] like Fig. 9As shown, the water sample collection and detection system 18 is correspondingly arranged in the lower cavity 103, and a first through groove 104 is opened on the side wall of the lower cavity of the box body 1. The water sample collection and detection system 18 is connected to the external water source through a delivery hose. The water sample collection and detection system 18 includes a water sample collection pipeline 181, a plurality of water quality detection sensors connected to the water sample collection pipeline 181 in sequence, and a water quality sampling port 189. The inlet end of the water sample collection pipeline 181 is connected to the external water source, and the water quality sampling port 189 is connected to the detection component and supplies water sample, that is, the water quality sampling port 189 is specifically fixedly connected to a connection port of the valve island 15 in the detection component. The water quality detection sensor includes a turbidity sensor 184, a pH sensor 186, an ammonia nitrogen sensor 187, and a COD sensor 188 arranged in sequence along the water sample collection pipeline 181. The inlet end of the water sample collection pipeline 181 is provided with an inlet ball valve 182, and the inlet end of the water sample collection pipeline 181 is connected with an overflow branch pipe and an overflow ball valve 183 connected to the outlet end of the overflow branch pipe. The inlet ball valve 182 and the overflow ball valve 183 are used to adjust the water pressure entering the water sample collection pipeline 181, so that the water flow can better enter the branches of each water quality detection sensor. A Y-type filter 185 is connected between the turbidity sensor 184 and the pH sensor 186 in the water sample collection pipeline 181. The Y-type filter 185 can filter large impurity particles in the water sample, reduce the maintenance cost of the water quality detection sensor, increase the service life of the water quality detection sensor, and reduce the impact of debris in the water sample on the detection result. The water quality sampling port 189 is correspondingly arranged at the drainage port 1810 of the water sample collection pipeline. The water sample first enters through the water sample collection pipeline 181 and then detects the turbidity, pH value and other parameters of the water sample through the water quality detection sensor, and then enters the total phosphorus detection system through the valve island 15 for total phosphorus detection. The horizontal partition 101 is provided with a second through groove 106 along its width direction, and the second through groove 106 is for a connecting hose between the valve island 15 and the water quality sampling port 189 to pass through.

[0050] like Fig.10As shown, a plurality of reagent bottles containing different solutions are placed in the upper rear cavity 105, and the detection components can selectively extract the reagents in the reagent bottles for calibration, detection or automatic cleaning. The reagent bottles include a standard sample reagent bottle 20, a pure water reagent bottle 21 and a reaction reagent bottle 22 which are connected to the valve island 15 in sequence. The standard sample reagent bottle 20 contains a standard sample, which is a potassium dihydrogen phosphate solution with a total phosphorus value of 10 mg / L; the pure water reagent bottle contains a pure water sample, which is distilled water; the reaction reagent bottle contains a reactant, which is a mixed solution of ammonium molybdate, ammonium metavanadate and hydrochloric acid. After the required reagents are prepared according to the above reagent requirements, they are injected into the corresponding reagent bottles, and then the reagent bottles are placed in the upper rear cavity 105, which can meet the needs of multiple detection of water samples. When the corresponding detection reagents are consumed, they can be replaced. The analyzer is equipped with a pure water reagent bottle, which contains distilled water. After completing a total phosphorus test, the distilled water can be circulated along the detection system 1 to 3 times using the same working method to complete the automatic cleaning of the equipment. The analyzer is equipped with a standard sample reagent bottle, which can automatically perform reference calibration on the detection system to improve the accuracy of the analyzer's detection.

[0051] like Figures 5 to 7 As shown, the detection pool 14 includes a support frame 141 with open front and rear sides, and a front cover plate 142 and a rear cover plate 143 correspondingly connected to the front and rear sides of the support frame 141 in a sealed manner. The rear cover plate 143 is provided with at least one cooling fan 144. Specifically, a cooling fan is provided at the upper and lower ends of the rear cover plate 143. A detection tube 145 is provided between the upper and lower end plates of the support frame 141. The upper and lower ends of the detection tube 145 are respectively provided with sealing columns 146, and the sealing columns 146 are respectively fixedly connected to the support frame 141 through fixing nuts 147; the two side plates of the support frame 141 are correspondingly provided with detection light source emitting ends 148 and detection light source receiving ends 149, and through holes for light to pass through are correspondingly opened on both sides of the support frame 141; the detection light source emitting end 148 emits light to pass through the detection tube 145, and the detection light source receiving end 149 receives the light to measure the absorbance of the solution after detection.

[0052] like Figure 8 As shown, the metering mechanism 16 includes a metering frame 161 and a metering tube 162 longitudinally arranged in the metering frame 161. The upper end of the metering tube 162 is connected to the peristaltic pump 13 through a pipeline, and the lower end thereof is connected to one of the pipeline interfaces of the valve island 15 through a pipeline, so as to ensure the smooth flow and precise control of the fluid; a high-position light source emitting end 163 and a high-position light source receiving end 164, a low-position light source emitting end 165 and a low-position light source receiving end 166 are respectively arranged on both sides of the upper and lower ends of the metering tube 162. The metering mechanism 16 arranged in this way realizes the volume measurement of the liquid flowing through by detecting the changes in the liquid level in the metering tube 162.

[0053] like Figure 4 As shown, the side wall of the box 1 is provided with a signal transmission panel 8, and the signal transmission panel 8 is provided with a 220V power input terminal 801 including a switch and a fuse protection, a USB socket interface 802, a Micro-USB interface 803 for debugging the control circuit, a 485 interface 804, a 232 interface 805 for signal output, and a self-priming pump socket 806 for controlling an external self-priming pump. The box can also be integrated with an alarm device, such as an audible and visual alarm, and data processing and alarm warning can be realized through the cooperation of the signal transmission panel 8 and the alarm device, real-time data monitoring, and timely sending of alarm information when the total nitrogen content of the water quality reaches the warning value, reminding the operator to take corresponding measures, and effectively ensuring the safety and stability of the water quality.

[0054] It should be noted that the analyzer 100 of the present invention also includes a control system integrated with the prior art. The detection components, water quality detection sensors, etc. in the total phosphorus detection system and the water sample collection and detection system of the present invention are all connected to the control system through wires. For example, the peristaltic pump motor, peristaltic pump driver, solenoid valve in the valve island, low-level light source transmitting end, low-level light source receiving end, high-level light source transmitting end, high-level light source receiving end, detection light source transmitting end and detection light source receiving end in the total phosphorus detection system are all connected to the control system through wires. For example, the turbidity sensor, pH sensor, ammonia nitrogen sensor and COD sensor in the water sample collection and detection system are connected to the control system through wires. The control system includes a control circuit and a touch screen. The control circuit is arranged in the box, and the touch screen is installed on the upper electrical door. The control system controls the operation of each component of the analyzer according to the preset process. The control system is integrated with a data collector, which can convert, store and transmit the data collected by the water quality detection sensor. The existing technologies including analog-to-digital converter (ADC) technology and digital signal processing technology can be used to convert the analog signal collected by the water quality detection sensor into a digital signal, and then transmit it to the data processing unit for processing; the control system is integrated with a data processing unit, and the main functions of the data processing unit include data storage, data analysis and alarm control, etc. The data processing unit uses existing processing technologies including fuzzy logic, neural networks, genetic algorithms, etc., which can process and analyze the collected data, and automatically alarm or automatically control according to the preset threshold. A communication module is integrated in the control system. The communication module uses two methods of wired communication and wireless communication, such as Ethernet, RS485, GPRS, WIFI and other existing technologies, and the collected data can be transmitted to the control system through a touch screen digital display or a remote monitoring center. The above-mentioned functional modules integrated in the control system can all be integrated with existing technologies to realize their functions, which will not be repeated here.

[0055] The working principle or working method of the utility model:

[0056] During operation, the water sample collection and detection system 18 is connected to an external water source, and the water sample is pumped into the water sample collection pipe 181 through a self-priming pump, and is divided into two parts after passing through the water inlet ball valve 182. Part of the water sample enters the overflow ball valve 183 for discharge, and part of the water sample enters the turbidity sensor 184. The water inlet ball valve 182 and the overflow ball valve 183 cooperate to realize the pressure regulation of the water quality detection sensor pipeline, so that the water sample can better enter each water quality detection sensor branch. After passing through the turbidity sensor 184, the water sample enters the Y-type filter 185. The Y-type filter 185 can filter out the debris particles in the water sample, reduce the impact of the debris in the water sample on the test results, reduce the maintenance cost of the water quality detection sensor, and increase the service life of the water quality detection sensor; then the water sample enters the pH sensor 186, the ammonia nitrogen sensor 187 and the COD sensor 188 in turn for corresponding water quality parameter detection, and finally after completing the water quality parameter collection of the water sample, enters the total phosphorus detection system in the upper cavity through the water quality sampling port 189 for total phosphorus sampling detection. Most of the water samples flowing through the water sample collection pipeline 181 are discharged through the drainage port 1810 of the water sample collection pipeline. After completing the total phosphorus detection, the water samples entering the total phosphorus detection system are mixed with the detection reagent and discharged into the waste liquid bottle for storage through the valve island 15. The waste liquid in the waste liquid bottle is uniformly recycled and processed.

[0057] When testing the total phosphorus of a water sample, open the solenoid valve connected to the water quality sampling port 189 in the valve island 15, use a peristaltic pump to extract the water sample in the water sample collection and detection system 18 into the metering mechanism 16, and after the volume is measured by the metering mechanism 16, open the solenoid valve of the detection pool 14, start the peristaltic pump 13 to inject the water sample into the detection pool 14, selectively open the solenoid valve corresponding to one or a combination of multiple reagent bottles of the valve island 15, use the peristaltic pump 13 to extract the reagent in the reagent bottle into the metering mechanism 16, and after the volume is measured by the metering mechanism 16, open the solenoid valve of the detection pool, and inject the reaction reagent into the detection tube 145. After all the detection reagents are injected, close the solenoid valve of the detection pool. Start the detection light source transmitting end 148 and the detection light source receiving end 149, the detection light source is 370nm, and the analyzer 100 analyzes the color changes before and after the detection, and converts this change into an AD value for digital display and storage through the touch screen 3. The waste liquid after detection is first sucked into the metering mechanism 16 through the valve island 15, and then the waste liquid in the metering mechanism is pumped into the waste liquid bottle for centralized collection and unified recycling.

[0058] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A multi-parameter water quality online detection analyzer, characterized in that: The analyzer (100) comprises: A box body (1), wherein the box body (1) is divided into an upper cavity and a lower cavity (103) by a horizontal partition (101), and an upper electrical door (2) and a lower electrical door (17) are hingedly connected to the upper cavity and the lower cavity (103) respectively on the front side of the box body (1); A total phosphorus detection system, the total phosphorus detection system comprising a mounting back plate (7) and a plurality of matching detection components integrated on the mounting back plate (7) for detecting total phosphorus in a water sample; the mounting back plate (7) is placed in the upper cavity to separate the upper cavity into an upper front cavity (102) and an upper rear cavity (105) corresponding to each other. A water sample collection and detection system (18), the water sample collection and detection system (18) being arranged in the lower cavity (103); the water sample collection and detection system (18) comprising a water sample collection pipeline (181), a plurality of water quality detection sensors sequentially connected to the water sample collection pipeline (181), and a water quality sampling port (189); the inlet end of the water sample collection pipeline (181) is connected to an external water source, and the water quality sampling port (189) is connected to a detection component and supplies water samples; A plurality of reagent bottles containing different solutions are placed in the upper rear cavity (105), and the detection component can selectively extract reagents from the reagent bottles for calibration, detection or automatic cleaning.

2. The multi-parameter water quality online detection analyzer according to claim 1 is characterized in that: The detection components include a peristaltic pump (13), a detection cell (14), a valve island (15), and a metering mechanism (16); The inlet end of the peristaltic pump (13) is connected to air, and the outlet end thereof is connected to the inlet end of the metering mechanism (16). The peristaltic pump (13) compresses a hose or a pipe to generate peristalsis inside the hose or pipe to push or extract the liquid to a target position. The top common end of the valve island (15) is connected to the outlet end of the metering mechanism (16); the right common end of the valve island (15) is respectively connected to the inlet end and the outlet end of the detection pool (14); the left port of the valve island (15) is respectively connected to the water quality sampling port (189) and a plurality of reagent bottles; the bottom common end of the valve island (15) is connected to the waste liquid bottle (23) via a delivery pipeline; and a pipeline connection port (10) corresponding to the valve island (15) is provided on one side of the box body.

3. The multi-parameter water quality online detection analyzer according to claim 2 is characterized in that: The reagent bottles comprise a standard sample reagent bottle (20), a pure water reagent bottle (21) and a reaction reagent bottle (22) which are sequentially connected to the valve island (15).

4. The multi-parameter water quality online detection and analysis instrument according to claim 2 is characterized in that: A peristaltic pump motor and a peristaltic pump driver are fixedly mounted on the back side of the mounting back plate (7); a drive shaft of the peristaltic pump motor passes through the mounting back plate (7) and is transmission-connected to the peristaltic pump (13); and the peristaltic pump motor is connected to the peristaltic pump driver.

5. The multi-parameter water quality online detection and analysis instrument according to claim 2 is characterized in that: The detection pool (14) comprises a support frame (141) with front and rear sides open, and a front cover plate (142) and a rear cover plate (143) correspondingly sealed and connected to the front and rear sides of the support frame (141); at least one cooling fan (144) is provided on the rear cover plate (143); A detection tube (145) is provided between the upper and lower end plates of the support frame (141), and sealing columns (146) are provided at the upper and lower ends of the detection tube (145), respectively, and the sealing columns (146) are fixedly connected to the support frame (141) via fixing nuts (147); The two side plates of the support frame (141) are provided with detection light source transmitting ends (148) and detection light source receiving ends (149) correspondingly, and through holes for light to pass through are provided on the two sides of the support frame (141); The detection light source emitting end (148) emits light that passes through the detection tube (145), and the detection light source receiving end (149) receives the light to measure the absorbance of the solution after digestion.

6. The multi-parameter water quality online detection and analysis instrument according to claim 5, characterized in that: A heating wire is wound around the surface of the detection tube (145), and the heating wire is connected to the heating wire assembly through a wire passing through the mounting back plate (7). A temperature sensor is also provided on one side of the detection tube (145).

7. The multi-parameter water quality online detection and analysis instrument according to claim 4, characterized in that: The metering mechanism (16) comprises a metering frame (161) and a metering tube (162) longitudinally arranged in the metering frame (161); the upper end of the metering tube (162) is connected to the peristaltic pump (13) through a pipeline, and the lower end of the metering tube (162) is connected to a pipeline interface of the valve island (15) through a pipeline; A high-position light source transmitting end (163) and a high-position light source receiving end (164), a low-position light source transmitting end (165) and a low-position light source receiving end (166) are respectively provided on both sides of the upper and lower ends of the metering tube (162).

8. The multi-parameter water quality online detection and analysis instrument according to claim 2, characterized in that: The water quality detection sensor comprises a turbidity sensor (184), a pH sensor (186), an ammonia nitrogen sensor (187) and a COD sensor (188) which are sequentially arranged along the water sample collection pipeline (181); The inlet end of the water sample collection pipe (181) is provided with a water inlet ball valve (182), and the inlet end of the water sample collection pipe (181) is connected to an overflow branch pipe and an overflow ball valve (183) connected to the outlet end of the overflow branch pipe; The water sample collection pipeline (181) is located between the turbidity sensor (184) and the pH sensor (186) and is connected to a Y-type filter (185); The water quality sampling port (189) is arranged correspondingly at the drainage port (1810) of the water sample collection pipeline.

9. The multi-parameter water quality online detection and analysis instrument according to claim 1, characterized in that: The side wall of the box body (1) is provided with a signal transmission panel (8), and the signal transmission panel (8) is provided with a 220V power input terminal (801) including a switch and a fuse protection, a USB socket interface (802), a Micro-USB interface (803) for debugging the control circuit, a 485 interface (804), a 232 interface (805) for signal output, and a self-priming pump socket (806) for controlling an external self-priming pump.

10. The multi-parameter water quality online detection and analysis instrument according to claim 1, characterized in that: The top of the upper electrical door (2) is provided with a touch screen (3), and the bottom of the upper electrical door (2) is provided with an observation window (5); the upper electrical door (2) and the lower electrical door (17) are respectively provided with a buckle lock (4) on a side away from the hinged portion; The side wall of the upper cavity is provided with air holes (11) and a ventilation fan (19); Lifting handles (9) are correspondingly provided on both sides of the box body (1).

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