Online COD monitoring and analysis instrument in water

Abstract

This utility model relates to the field of water quality testing technology and discloses an online COD monitoring and analysis instrument for water. It includes an instrument housing with a cabinet door rotatably connected to the front side. A testing mechanism is located in the middle of the inner side of the instrument housing for cleaning and filtering the test water. A maintenance mechanism is located inside the instrument housing for maintaining the cleaning equipment. The testing mechanism includes a support plate, the outer wall of which is fixedly connected to the inner side of the instrument housing. A detection module is fixedly connected to the top center of the support plate. In this utility model, the inlet water pressure is initially controlled by a water pump, and then the flow rate of the water sample entering the detection module is precisely adjusted by a peristaltic pump, avoiding flow fluctuations that occur when a single pump is running. Simultaneously, a cleaner performs backwashing inside the detection module, reducing the risk of sampling failure due to pipeline blockage during automated control.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing technology, and in particular to an online COD monitoring and analysis instrument for water. Background Technology

[0002] Against the backdrop of continuous industrialization and urbanization, water pollution has become increasingly prominent. Among these issues, organic pollution has a particularly significant impact on water quality. Large amounts of industrial wastewater, domestic sewage, and agricultural non-point source pollutants enter water bodies without adequate treatment, leading to the accumulation of reducing substances and causing a series of problems such as decreased dissolved oxygen and ecosystem imbalance. This directly threatens the sustainable use of water resources and ecological security. COD, as a core indicator for measuring the total amount of organic matter and reducing substances in water bodies, directly reflects the degree of water pollution. Therefore, accurate monitoring of COD is crucial for understanding the water environment and implementing effective governance. With increasing environmental protection efforts, COD has been incorporated into the national key pollutant emission control system. Relevant laws and regulations clearly require key polluting units to monitor COD in their wastewater discharge in real time and connect to the monitoring platform of the environmental protection authorities to ensure real-time transmission and effective supervision of monitoring data.

[0003] Traditional laboratory COD testing methods rely on manual sampling and offline analysis, which are not only cumbersome and time-consuming, but also difficult to track water pollution in real time, capture dynamic changes in pollution, and meet the needs of rapid response and continuous monitoring. The continuous development of sensor technology, automated control technology, spectral analysis technology, and data transmission technology has enabled instruments to achieve integrated functions of automatic sampling, digestion, detection, data processing, and remote communication. This not only improves the efficiency and accuracy of monitoring, but also reduces errors caused by manual intervention and enhances the stable operation of equipment in complex environments. However, the stability of sensors is easily affected by the complexity of water sample matrix and is relatively sensitive to changes in turbidity and color. When algae and sediment are mixed in the water, measurement interference is easily generated, affecting the accuracy of the data. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an online COD monitoring and analysis instrument for water, aiming to improve the problems in the prior art where the stability of the sensor is easily affected by the complexity of the water sample matrix, it is relatively sensitive to changes in the turbidity and color of the water sample, and when the water body is mixed with sediment, it is easy to cause measurement interference and affect the accuracy of the data.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an online COD monitoring and analysis instrument in water, comprising an instrument housing, a cabinet door rotatably connected to the front side of the instrument housing, a testing mechanism disposed in the middle of the inner side of the instrument housing, the testing mechanism being used for cleaning and filtering the test water, a maintenance mechanism disposed in the inner side of the instrument housing, the maintenance mechanism being used for maintaining the cleaning equipment, the testing mechanism comprising a support plate, the outer wall of the support plate being fixedly connected to the inner side of the instrument housing, a detection module being fixedly connected to the top center of the support plate, a peristaltic pump being connected to the left side of the detection module, a cleaning tank being connected to the bottom of the peristaltic pump, an L-shaped pipe being connected to the left side of the cleaning tank, a water pump being connected to the bottom of the L-shaped pipe, the bottom of the water pump being fixedly connected to the bottom left end of the inner side of the instrument housing, a support assembly being disposed at the bottom of the cleaning tank, and a cleaning assembly being disposed on the right side of the detection module.

[0006] As a further description of the above technical solution:

[0007] The maintenance mechanism includes a filter screen, the outer wall of which is disposed inside the cleaning box. An adjusting plate is slidably connected to the front of the cleaning box. An opening is provided in the upper middle part of the adjusting plate. A cover plate is provided on the top of the cleaning box. A sliding groove is provided on the top of the cover plate. An adjusting plate is slidably connected to the inner side of the sliding groove. The front side of the adjusting plate engages with the inner wall of the opening.

[0008] As a further description of the above technical solution:

[0009] The support assembly includes a support block, the rear side of which is fixedly connected to the inner rear end of the instrument housing, and a support platform is fixedly connected to the top of the support block, the top of which is fitted against the bottom of the cleaning box.

[0010] As a further description of the above technical solution:

[0011] The cleaning assembly includes a cleaning tank, the bottom of which is fixedly connected to the bottom right end of the inner side of the instrument housing, and the top front side of the cleaning tank is connected to an inlet pipe.

[0012] As a further description of the above technical solution:

[0013] The top of the cleaning tank is connected to a connecting pipe, and a control valve is installed on the front side of the connecting pipe.

[0014] As a further description of the above technical solution:

[0015] The top of the connecting pipe is connected to a cleaner, and the left side of the cleaner is connected to the right side of the detection module.

[0016] As a further description of the above technical solution:

[0017] An observation panel is fixedly connected to the front side of the cabinet door, and a display screen is fixedly connected to the top of the inner front end of the instrument housing.

[0018] As a further description of the above technical solution:

[0019] A protective plate is rotatably connected to the bottom left side of the instrument housing, and casters are fixedly connected to all four sides of the bottom of the instrument housing.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the inlet water pressure is initially controlled by a water pump, and then the flow rate of the water sample entering the detection module is precisely adjusted by a peristaltic pump. This avoids flow fluctuations that occur when a single pump is running. When cleaning is required, the detection module can be backwashed by a cleaner, which reduces the risk of sampling failure due to pipeline blockage in automated control, reduces the frequency of downtime maintenance due to system failure, and ensures the continuity of online monitoring.

[0022] 2. In this utility model, the water entering the cleaning box is filtered through a filter screen. Then, by sliding the first adjustment plate upward, the engagement between the second adjustment plate and the hole is released. By sliding the second adjustment plate backward, the cover can be rotated and opened to clean the filter material on the top of the filter screen, preventing clogging and avoiding problems such as reduced water flow and interruption of detection caused by filter screen blockage. At the same time, corresponding chemical reagents can be added according to different water sources to further improve the water purification effect and indirectly improve the accuracy of COD measurement. Attached Figure Description

[0023] Figure 1 This is a perspective view of the front side of the instrument casing of the online COD monitoring and analysis instrument in water proposed in this utility model.

[0024] Figure 2 This is a partial structural diagram of the support plate of the online COD monitoring and analysis instrument in water proposed in this utility model;

[0025] Figure 3 This is a partial structural diagram of the support platform for the online COD monitoring and analysis instrument in water proposed in this utility model;

[0026] Figure 4 This is a partial structural exploded view of the cleaning tank of the online COD monitoring and analysis instrument in water proposed in this utility model;

[0027] Figure 5 This is a partial structural breakdown diagram of the adjustment plate of the online COD monitoring and analysis instrument in water proposed in this utility model.

[0028] Legend:

[0029] 1. Instrument housing; 2. Testing mechanism; 201. Support plate; 202. Detection module; 203. Peristaltic pump; 204. Cleaning box; 205. L-shaped tube; 206. Water pump; 207. Support assembly; 2071. Support block; 2072. Support platform; 208. Cleaning assembly; 2081. Cleaning tank; 2082. Liquid inlet pipe; 2083. Connecting pipe; 2084. Control valve; 2085. Cleaner; 3. Maintenance mechanism; 301. Filter screen; 302. Adjustment plate one; 303. Hole; 304. Cover plate; 305. Slide groove; 306. Adjustment plate two; 4. Cabinet door; 5. Observation plate; 6. Display screen; 7. Protective plate; 8. Casters. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 - Appendix Figure 3 An embodiment of this utility model provides an online COD monitoring and analysis instrument in water, including an instrument housing 1, a cabinet door 4 rotatably connected to the front side of the instrument housing 1, a testing mechanism 2 provided in the middle of the inner side of the instrument housing 1, the testing mechanism 2 being used for cleaning and filtering the test water, a maintenance mechanism 3 provided in the inner side of the instrument housing 1, the maintenance mechanism 3 being used for maintaining the cleaning equipment, the testing mechanism 2 including a support plate 201, the outer wall of the support plate 201 being fixedly connected to the inner side of the instrument housing 1, a detection module 202 being fixedly connected to the top center of the support plate 201, a peristaltic pump 203 being connected to the left side of the detection module 202, a cleaning tank 204 being connected to the bottom of the peristaltic pump 203, an L-shaped pipe 205 being connected to the left side of the cleaning tank 204, a water pump 206 being connected to the bottom of the L-shaped pipe 205, the bottom of the water pump 206 being fixedly connected to the bottom left end of the inner side of the instrument housing 1, a support component 207 being provided at the bottom of the cleaning tank 204, and a cleaning component 208 being provided on the right side of the detection module 202;

[0032] Specifically, a cabinet door 4 is provided on the front side of the instrument housing 1 via a rotating connection, facilitating instrument operation and maintenance. A testing mechanism 2 is located in the center of the inner side of the instrument housing 1, its function being to ensure the accuracy of test results. A maintenance mechanism 3 is also provided on the inner side of the instrument housing 1, used for necessary maintenance to ensure long-term stable operation. A support plate 201 is located on the inner side of the instrument housing 1, providing stable support for the entire testing mechanism 2. A detection module 202 is fixedly connected to the top center of the support plate 201; this is the core part for COD determination, used to achieve the detection effect. A peristaltic pump 203 is connected to the left side of the detection module 202, used to propel the water sample through the system. A cleaning tank 204 is connected to the bottom of the peristaltic pump 203, used to store filtered clean water samples. An L-shaped pipe 205 is connected to the left side of the cleaning tank 204, and a water pump 206 is further connected to the bottom of the L-shaped pipe 205. The bottom of the water pump 206 is fixedly connected to the bottom left end of the inner side of the instrument housing 1, ensuring the stability of the water pump 206.

[0033] Please see the appendix Figure 3 - Appendix Figure 5 The maintenance mechanism 3 includes a filter screen 301. The outer wall of the filter screen 301 is set inside the cleaning box 204. An adjustment plate 302 is slidably connected to the front side of the cleaning box 204. An opening 303 is provided in the upper middle part of the adjustment plate 302. A cover plate 304 is provided on the top of the cleaning box 204. A sliding groove 305 is provided on the top of the cover plate 304. An adjustment plate 306 is slidably connected to the inner side of the sliding groove 305. The front side of the adjustment plate 306 engages with the inner wall of the opening 303.

[0034] Specifically, the outer wall of the filter screen 301 is fixed to the inner side of the cleaning box 204, which can ensure the stability of the filter screen 301 in the cleaning box 204, thereby intercepting impurities entering the cleaning box 204. The upper middle part of the adjusting plate 302 is specially provided with a hole 303. This hole 303 is for the fixed engagement of the structure. The cover plate 304 protects the internal structure of the cleaning box 204 and controls the cleaning of impurities. The adjusting plate 306 is slidably installed on the inner side of the slide groove 305. The front side of the adjusting plate 306 can engage with the inner wall of the hole 303 to achieve protection after internal cleaning and maintenance.

[0035] Please see the appendix Figure 1 - Appendix Figure 3An observation plate 5 is fixedly connected to the front side of the cabinet door 4. A display screen 6 is fixedly connected to the top of the inner front end of the instrument housing 1. The support assembly 207 includes a support block 2071. The rear side of the support block 2071 is fixedly connected to the rear end of the inner side of the instrument housing 1. A support platform 2072 is fixedly connected to the top of the support block 2071. The top of the support platform 2072 is attached to the bottom of the cleaning box 204. A protective plate 7 is rotatably connected to the bottom left side of the instrument housing 1. Universal wheels 8 are fixedly connected to all four sides of the bottom of the instrument housing 1.

[0036] Specifically, the observation plate 5 facilitates viewing the monitoring results inside the cabinet. The display screen 6 is fixedly connected to the top of the inner front of the instrument housing 1 to display various operating information and status of the instrument. The rear part of the support block 2071 is fixedly connected to the inner rear part of the instrument housing 1 to ensure overall stability. The top of the support block 2071 is fixedly connected to the support platform 2072. The top plane of the support platform 2072 fits against the bottom plane of the cleaning box 204 to provide stable support. There is a rotatable protective plate 7 at the bottom left side of the instrument housing 1. This protective plate 7 can rotate when needed to facilitate connection to the test water source. Multiple casters 8 are evenly fixedly connected around the bottom of the instrument housing 1, making the entire instrument easy to move.

[0037] Please see the appendix Figure 1 - Appendix Figure 3 The cleaning assembly 208 includes a cleaning tank 2081. The bottom of the cleaning tank 2081 is fixedly connected to the bottom right end of the inner side of the instrument housing 1. The top front side of the cleaning tank 2081 is connected to an inlet pipe 2082. The top of the cleaning tank 2081 is connected to a connecting pipe 2083. A control valve 2084 is installed on the front side of the connecting pipe 2083. The top of the connecting pipe 2083 is connected to a cleaner 2085. The left side of the cleaner 2085 is connected to the right side of the detection module 202.

[0038] Specifically, the bottom of the cleaning tank 2081 is fixedly connected to the bottom right end of the inner side of the instrument housing 1 to ensure its stability during use. The top of the cleaning tank 2081 is connected to the liquid inlet pipe 2082 for easy addition of cleaning solution. The top of the cleaning tank 2081 is connected to the connecting pipe 2083 to form a liquid transmission channel. A control valve 2084 is installed on the front side of the connecting pipe 2083. The control valve 2084 is used to regulate the flow rate and velocity of the liquid to ensure the controllability of the cleaning process. The top of the connecting pipe 2083 continues to extend to the cleaner 2085. The left side of the cleaner 2085 is connected to the right side of the detection module 202 to ensure that the cleaned liquid can enter the detection module 202 for cleaning.

[0039] Working principle: The water is connected to the water source to be monitored via water pump 206, and then the water is transferred to the cleaning tank 204 for purification. The purified water is then transferred to the detection module 202 by peristaltic pump 203 for detection. The water pump 206 can initially control the inlet water pressure, and the peristaltic pump 203 can precisely adjust the flow rate of the water sample entering the detection module 202, avoiding flow fluctuations that occur when a single pump is running. When cleaning is required, the cleaning fluid inside the cleaning tank 2081 can be extracted through the cleaner 2085 to ensure a stable water sample supply during the detection process. The water is then transferred to the detection module 202 and the pipe is backwashed, reducing the risk of sampling failure due to pipe blockage in automated control, reducing the frequency of downtime maintenance due to system failure, and ensuring the continuity of online monitoring.

[0040] The water entering the cleaning tank 204 is filtered through the filter screen 301. Then, by sliding the first adjustment plate 302 upward, the engagement between the second adjustment plate 306 and the hole 303 is released. By sliding the second adjustment plate 306 backward, the cover plate 304 can be rotated and opened to clean the filter material on the top of the filter screen 301, preventing clogging and avoiding problems such as reduced water flow and interruption of detection caused by clogging of the filter screen 301. At the same time, corresponding chemical reagents can be added according to different water sources to further improve the water purification effect and indirectly improve the accuracy of COD measurement.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online COD monitoring and analysis instrument for water, including an instrument housing (1), characterized in that: The front side of the instrument housing (1) is rotatably connected to a cabinet door (4). A testing mechanism (2) is provided in the middle of the inner side of the instrument housing (1). The testing mechanism (2) is used for cleaning and filtering the test water. A maintenance mechanism (3) is provided on the inner side of the instrument housing (1). The maintenance mechanism (3) is used for maintaining the cleaning equipment. The testing mechanism (2) includes a support plate (201), the outer wall of which is fixedly connected to the inner side of the instrument housing (1). A detection module (202) is fixedly connected to the top center of the support plate (201). A peristaltic pump (203) is connected to the left side of the detection module (202). A cleaning box (204) is connected to the bottom of the peristaltic pump (203). An L-shaped tube (205) is connected to the left side of the cleaning box (204). A water pump (206) is connected to the bottom of the L-shaped tube (205). The bottom of the water pump (206) is fixedly connected to the bottom left end of the inner side of the instrument housing (1). A support component (207) is provided at the bottom of the cleaning box (204). A cleaning component (208) is provided on the right side of the detection module (202).

2. The online COD monitoring and analysis instrument in water according to claim 1, characterized in that: The maintenance mechanism (3) includes a filter screen (301), the outer wall of which is disposed inside the cleaning box (204). An adjusting plate (302) is slidably connected to the front side of the cleaning box (204). A hole (303) is provided in the upper middle part of the adjusting plate (302). A cover plate (304) is provided on the top of the cleaning box (204). A sliding groove (305) is provided on the top of the cover plate (304). An adjusting plate (306) is slidably connected to the inner side of the sliding groove (305). The front side of the adjusting plate (306) engages with the inner wall of the hole (303).

3. The online COD monitoring and analysis instrument in water according to claim 1, characterized in that: The support assembly (207) includes a support block (2071), the rear side of which is fixedly connected to the inner rear end of the instrument housing (1), and a support platform (2072) is fixedly connected to the top of the support block (2071), the top of which is attached to the bottom of the cleaning box (204).

4. The online COD monitoring and analysis instrument in water according to claim 1, characterized in that: The cleaning assembly (208) includes a cleaning tank (2081), the bottom of which is fixedly connected to the bottom right end of the inner side of the instrument housing (1), and the top front side of the cleaning tank (2081) is connected to an inlet pipe (2082).

5. The online COD monitoring and analysis instrument in water according to claim 4, characterized in that: The top of the cleaning tank (2081) is connected to a connecting pipe (2083), and a control valve (2084) is installed on the front side of the connecting pipe (2083).

6. The online COD monitoring and analysis instrument in water according to claim 5, characterized in that: The top of the connecting pipe (2083) is connected to a cleaner (2085), and the left side of the cleaner (2085) is connected to the right side of the detection module (202).

7. The online COD monitoring and analysis instrument in water according to claim 1, characterized in that: An observation panel (5) is fixedly connected to the front side of the cabinet door (4), and a display screen (6) is fixedly connected to the top of the inner front end of the instrument housing (1).

8. The online COD monitoring and analysis instrument in water according to claim 1, characterized in that: A protective plate (7) is rotatably connected to the bottom left side of the instrument housing (1), and casters (8) are fixedly connected to the bottom of the instrument housing (1) on all four sides.

Images