Pretreatment device for detecting water sample by using fluorospectro photometer

Abstract

The utility model relates to the technical field of water detection, in particular to a pretreatment device for detecting a water sample by using a fluorospectro photometer, which comprises a base, a controller, a filtering mechanism, a diluting mechanism and a treatment mechanism, the diluting mechanism comprises a water storage tank, a liquid metering pump and a shunting assembly; the filtering mechanism comprises a plurality of filter membranes and a plurality of sample adding assemblies. According to the pretreatment device for detecting the water sample by the fluorospectro photometer, the water sample to be detected can be automatically filtered and diluted, so that the subsequent detection standard is met, manual filtering and filtering operation are not needed, a large number of steps are reduced, the pretreatment time is saved, and the detection efficiency is improved. The pretreatment efficiency of the water sample is improved, and the detection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of water detection technology, specifically to a pretreatment device for water sample detection using a fluorescence spectrophotometer. Background Technology

[0002] Fluorescence spectrophotometry is a sensitive and efficient analytical method for wastewater testing, particularly suitable for detecting pollutants with fluorescent properties, such as polycyclic aromatic hydrocarbons, petroleum hydrocarbons, and dissolved organic matter. Before testing, the water sample should be pretreated to ensure the accuracy and reliability of the results. Pretreatment first requires removing physical interferences, i.e., treating suspended particulate matter in the wastewater, and diluting the sample to remove light loss caused by turbidity. Then, the sample needs to be treated to eliminate chemical interferences, preventing the impact of internal filtration effects, pH sensitivity, and fluorescence quenching on the accuracy of the results.

[0003] Existing preprocessing methods have the following shortcomings:

[0004] Currently, fluorescence detection of water samples requires manual filtration using a 0.45µm filter membrane, followed by proportional dilution. This process is time-consuming and results in low water sample detection efficiency.

[0005] Because the pipeline cannot be flushed in time, the mixing of water samples of different concentrations can affect the accuracy of water sample test results. Utility Model Content

[0006] The purpose of this invention is to provide a pretreatment device for water sample detection using a fluorescence spectrophotometer.

[0007] The present invention adopts the following technical solution:

[0008] A pretreatment device for detecting water samples using a fluorescence spectrophotometer includes a base and a controller, with the controller located on top of the base.

[0009] It also includes a filtration system, a dilution system, and a treatment system;

[0010] The processing mechanism is located on the top of the base. The processing mechanism includes a vacuum assembly, a stirring assembly, and several water sample bottles. The several water sample bottles are symmetrically arranged on the top of the base. The stirring assembly is located inside the several water sample bottles, and the vacuum assembly is located between the base and the several water sample bottles.

[0011] The dilution mechanism is located on the top of the base. The dilution mechanism includes a water storage tank, a liquid metering pump, and a flow distribution assembly. The water storage tank is fixedly located on the top of the base, the flow distribution assembly is located between several sample dispensing assemblies, and the liquid metering pump is fixedly located between the water storage tank and the flow distribution assembly.

[0012] The filtration mechanism is located above the processing mechanism. The filtration mechanism includes several filter membranes and several sample dispensing components. Each water sample bottle is fitted with a sealing cap on top. Each sample dispensing component is located on top of a sealing cap. Each filter membrane is located on a sample dispensing component. The vacuuming component, stirring component, diversion component, and each sample dispensing component are electrically connected to the controller.

[0013] Preferably, each sample feeding assembly includes a filter device, a delivery pipe, a first solenoid valve, and a second solenoid valve. A support frame is fixedly provided on the top of the base, and the filter device is fixedly provided on the support frame. Each sealing cap has a water inlet at its top and a water outlet at its bottom. The delivery pipe is fixedly provided between the water outlet and the water inlet. The first solenoid valve is fixedly provided on the outer wall of the delivery pipe near the filter device. The second solenoid valve is fixedly provided on the outer wall of the delivery pipe near the sealing cap. An annular plate for installing the filter membrane is fixedly provided inside the filter device. Both the first and second solenoid valves are electrically connected to the controller.

[0014] Preferably, the stirring assembly includes several magnetic stirrers, each of which is rotatably mounted on the inner bottom of a water sample bottle. Each water sample bottle has a liquid level sensor on its inner wall, and each magnetic stirrer and each liquid level sensor are electrically connected to the controller.

[0015] Preferably, the vacuum assembly includes a vacuum pump, a suction pipe, and several first branch pipes. The vacuum pump is fixedly mounted on the top of the base, the suction pipe is fixedly mounted on its input end via a quick connector, and several first branch pipes are fixedly mounted between the suction pipe and several water sample bottles. Each first branch pipe has a third solenoid valve fixedly mounted on the outer wall of the end near the water sample bottle. The vacuum pump and each third solenoid valve are electrically connected to the controller.

[0016] Preferably, the diversion assembly includes an inlet pipe, several second branch pipes, several fourth solenoid valves, and several fifth solenoid valves. A drain pipe is provided at the bottom of the water storage tank. The input end of the liquid metering pump is fixedly connected to the drain pipe. The inlet pipe is fixedly located at the output end of the liquid metering pump. Several second branch pipes are fixedly located between the bottom of the inlet pipe and several delivery pipes. Several fourth solenoid valves are equally spaced on the outer wall of the inlet pipe. Each fifth solenoid valve is fixedly located on the outer wall of each second branch pipe. Each fourth solenoid valve and each fifth solenoid valve are electrically connected to the controller.

[0017] Preferably, a discharge tube is fixed on the bottom outer wall of each water sample bottle, and a manual valve is provided on the outer wall of each discharge tube.

[0018] Preferably, a sealing ring is fitted on the bottom and top outer walls of each sealing cap.

[0019] Preferably, a sample addition tube is fixedly provided at the top of each filter device.

[0020] The beneficial effects of this utility model are:

[0021] This invention, through the design of a filtration mechanism consisting of several filter membranes and several sample dispensing components, first allows the water sample to be tested to pass through a 0.45µm pore size filter membrane, automatically removing particulate matter, suspended solids, and some impurities from the water sample. This improves the purity of the water sample entering the sample bottle, eliminating the need for manual filtration, thus increasing the filtration efficiency of the water sample. It is more suitable for detection by a fluorescence spectrophotometer, ensuring unobstructed light path and accurate transmission of light signals, thereby improving detection accuracy.

[0022] This invention incorporates a dilution mechanism, consisting of a water storage tank, a liquid metering pump, and a diversion component. The liquid metering pump inputs a corresponding proportion of pure water based on the concentration of the water sample, and a magnetic stirrer agitates the mixture. This ensures that the high-concentration water sample is mixed evenly and quickly with the added pure water, allowing for real-time adjustment of the dilution ratio. This allows for adjustment of the dilution degree of the water sample, meeting the dilution requirements of different water samples and enhancing the flexibility of the device.

[0023] Combining the beneficial effects of points 1 and 2, this utility model designs a pretreatment device for water samples to be detected by a fluorescence spectrophotometer. It can realize automatic filtration and automatic dilution of sewage, thereby meeting the subsequent detection standards. It eliminates the need for manual filtration and filtration operations, reduces a large number of steps, saves working time, improves the pretreatment efficiency of water samples, and thus helps to improve the detection efficiency of sewage.

[0024] This invention, through the design of a diversion component and several sample feeding components, along with several first, second, third, fourth, and fifth solenoid valves, can perform forward and reverse flushing of the delivery tube for adding water samples to the water sample bottle. On the one hand, it can prevent impurities from clogging the delivery tube; on the other hand, it can flush down the water sample previously adhering to the inner wall of the delivery tube, preventing it from being confused with the water sample entering for subsequent testing and causing inaccurate subsequent test data. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0028] Figure 4 for Figure 3 Enlarged view of point B in the image;

[0029] Figure 5 This is a cross-sectional three-dimensional structural diagram of the filtration device and water sample bottle of this utility model;

[0030] Figure 6 for Figure 5 Enlarged view of point C in the image;

[0031] In the diagram: Controller 1, water sample bottle 2, water storage tank 3, liquid metering pump 4, filter membrane 5, sealing cap 6, filtration device 7, delivery pipe 8, first solenoid valve 9, second solenoid valve 10, annular plate 11, magnetic stirrer 12, liquid level sensor 13, vacuum pump 14, suction pipe 15, first branch pipe 16, third solenoid valve 17, water inlet pipe 18, second branch pipe 19, fourth solenoid valve 20, fifth solenoid valve 21, drain pipe 22, discharge pipe 23, manual valve 24, sealing ring 25, sample addition pipe 26. Detailed Implementation

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0034] Reference Figures 1 to 6 As shown, a pretreatment device for detecting water samples using a fluorescence spectrophotometer includes a base and a controller 1. The controller 1 is located on the top of the base. The outer wall of the controller 1 is equipped with a display, several switch buttons, and several rotary switches. The operator can adjust the rotary switches according to the liquid level signal in the water sample bottle 2 to input the volume of the sample to be obtained and the dilution factor. The several switch buttons can control the opening and closing of the liquid metering pump 4, the vacuum pump 14, the first solenoid valve 9, the second solenoid valve 10, the third solenoid valve 17, the fourth solenoid valve 20, and the fifth solenoid valve 21 to realize forward washing, back washing, and other operation functions.

[0035] It also includes a filtration system, a dilution system, and a treatment system;

[0036] The processing mechanism is located on the top of the base. The processing mechanism includes a vacuuming component, a stirring component, and several water sample bottles 2. The several water sample bottles 2 are symmetrically arranged on the top of the base. The stirring component is located inside the several water sample bottles 2, and the vacuuming component is located between the base and the several water sample bottles 2.

[0037] The dilution mechanism is located on the top of the base. The dilution mechanism includes a water storage tank 3, a liquid metering pump 4, and a flow distribution assembly. The water storage tank 3 is fixedly located on the top of the base. The flow distribution assembly is located between several sample addition assemblies. The liquid metering pump 4 is fixedly located between the water storage tank 3 and the flow distribution assembly.

[0038] The filtration mechanism is located above the processing mechanism. The filtration mechanism includes several filter membranes 5 and several sample dispensing components. Each water sample bottle 2 is fitted with a sealing cap 6 on top. Each sample dispensing component is located on top of a sealing cap 6. Each filter membrane 5 is located on a sample dispensing component. The vacuuming component, stirring component, diversion component, and each sample dispensing component are electrically connected to the controller 1.

[0039] Reference Figures 1 to 6 As shown, each sample dispensing assembly includes a filter device 7, a delivery pipe 8, a first solenoid valve 9, and a second solenoid valve 10. A support frame is fixedly mounted on the top of the base, and the filter device 7 is fixedly mounted on the support frame. Each sealing cap 6 has a water inlet at its top and a water outlet at its bottom. The delivery pipe 8 is fixedly positioned between the water outlet and the water inlet. The first solenoid valve 9 is fixedly mounted on the outer wall of the delivery pipe 8 near the end of the filter device 7, and the second solenoid valve 10 is fixedly mounted on the outer wall of the delivery pipe 8 near the end of the sealing cap 6. An annular plate 11 for mounting the filter membrane 5 is fixedly mounted inside the filter device 7. Both the first solenoid valve 9 and the second solenoid valve 10 are electrically connected to the controller 1. When the water sample enters the interior of the filter device 7 through the sample dispensing pipe 26, the controller 1 activates the first solenoid valve. 9 and the second solenoid valve 10 allow the water sample to first pass through a filter membrane 5 with a filter hole diameter of 0.45 μm. After the water sample is filtered through the filter membrane 5, particulate matter, suspended solids and some impurities in the water sample can be removed to obtain a purer sample, which is more suitable for detection by a fluorescence spectrophotometer. This ensures the smooth flow of the light path and the accurate transmission of the light signal, which is beneficial to improving the detection accuracy. The filtered water sample enters the water sample bottle 2 through the outlet, the delivery pipe 8 and the inlet in sequence. Before this, the inside of the water sample bottle 2 has been vacuumed. It should be noted that magnetic stirring is existing technology and common knowledge to those skilled in the art, so it will not be described in detail here. At the same time, it should be noted that pure water can be poured from the filter cylinder into the delivery pipe 8 through the sample addition tube 26 to rinse the delivery pipe 8 in the forward direction.

[0040] Reference Figures 1 to 6As shown, the stirring assembly includes several magnetic stirrers 12, each of which is rotatably mounted on the inner bottom of a water sample bottle 2. Each water sample bottle 2 has a liquid level sensor 13 installed on its inner wall. Each magnetic stirrer 12 and each liquid level sensor 13 are electrically connected to the controller 1. When pure water enters the water sample bottle 2, the controller 1 activates the magnetic stirrer 12, thereby stirring the added pure water and the water sample inside the bottle 2. This facilitates rapid mixing and allows for appropriate dilution of water samples with excessively high concentrations, adjusting the concentration to a measurable range and improving detection efficiency. The liquid level sensor 13 monitors the liquid level in the water sample bottle 2 in real time, allowing the testing personnel to know the water sample content in the bottle 2. Simultaneously, a certain proportion of pure water is precisely input via the liquid metering pump 4, facilitating real-time adjustment of the dilution ratio to regulate the degree of dilution and meet the dilution requirements of different water samples, thus enhancing the flexibility of the device.

[0041] Reference Figures 1 to 6 As shown, the vacuum assembly includes a vacuum pump 14, a suction pipe 15, and several first branch pipes 16. The vacuum pump 14 is fixedly mounted on the top of the base. The suction pipe 15 is fixedly mounted on its input end via a quick connector. Several first branch pipes 16 are fixedly mounted between the suction pipe 15 and several water sample bottles 2. Each first branch pipe 16 has a third solenoid valve 17 fixedly mounted on its outer wall near the end of the water sample bottle 2. The vacuum pump 14 and each third solenoid valve 17 are electrically connected to the controller 1. Before the water sample enters the water sample bottle 2 after filtration, the vacuum pump 14 and several third solenoid valves 17 are activated by the controller 1. 7. At the same time, several second solenoid valves 10 remain closed. Since the suction pipe 15 is fixedly connected to the input end of the vacuum pump 14 through a quick connector, the suction pipe 15 and several water sample bottles 2 are respectively fixedly connected to both ends of several first branch pipes 16. Each first branch pipe 16 is fixedly connected to a third solenoid valve 17 at the end near the water sample bottle 2. Thus, the vacuum pump 14, the suction pipe 15 and the several first branch pipes 16 simultaneously evacuate the inside of several water sample bottles 2, extracting the air trapped in the several water sample bottles 2 to prevent it from affecting the next batch of water sample processing.

[0042] Reference Figures 1 to 6As shown, the diversion assembly includes an inlet pipe 18, several second branch pipes 19, several fourth solenoid valves 20, and several fifth solenoid valves 21. A drain pipe 22 is located at the bottom of the water storage tank 3. The input end of the liquid metering pump 4 is fixedly connected to the drain pipe 22. The inlet pipe 18 is fixedly located at the output end of the liquid metering pump 4. Several second branch pipes 19 are fixedly located between the bottom of the inlet pipe 18 and several delivery pipes 8. Several fourth solenoid valves 20 are evenly spaced on the outer wall of the inlet pipe 18. Each fifth solenoid valve 21 is fixedly located on the outer wall of each second branch pipe 19. Each fourth solenoid valve 20 and each fifth solenoid valve 21 are electrically connected to the controller 1. When the concentration of the water sample in a certain water sample bottle 2 is too high, the liquid metering pump 4 is activated by the controller 1. Since the input and output ends of the liquid metering pump 4 are respectively connected to the water storage tank 3... One end of the drain pipe 22 and the inlet pipe 18 of tank 3 are fixedly connected, thus opening the fifth solenoid valve 21 on the outer wall of the second branch pipe 19 connected to the water sample bottle 2. The remaining unused fourth solenoid valve 20 and fifth solenoid valve 21 are kept closed, so that the pure water in the water storage tank 3 is accurately input into the water sample bottle 2 with a higher water sample concentration through the liquid metering pump 4, thereby achieving the dilution of the high concentration water sample and adjusting the sample concentration to the measurable range. It should be noted that by closing the second solenoid valve 10, the liquid metering pump 4 can sequentially transport pure water through the inlet pipe 18 and the second branch pipe 19 to the inside of the delivery pipe 8 for backwashing of the delivery pipe 8. Combined with the forward washing operation, the inner wall of the delivery pipe 8 can be effectively cleaned, thereby preventing the mixing of water samples of different concentrations inside the water delivery pipe and causing inaccurate test data.

[0043] Reference Figures 1 to 6 As shown, each water sample bottle 2 has a drain tube 23 fixed on the bottom outer wall, and each drain tube 23 has a manual valve 24 on its outer wall. When the water sample in the water sample bottle 2 meets the detection requirements of the fluorescence spectrophotometer after pretreatment, the pretreated water sample is discharged from the water sample bottle 2 through the drain tube 23 by manually rotating the handwheel designed on the manual valve 24, which facilitates the transfer of the pretreated water sample into the fluorescence spectrophotometer.

[0044] Reference Figures 1 to 6 As shown, each sealing cap 6 has a sealing ring 25 fitted on its bottom and top outer walls. The sealing cap 6 seals the water sample bottle 2 to prevent pollutants in the outside air from entering the water sample bottle 2 and causing secondary pollution of the filtered water sample, which would lead to inaccurate detection by the subsequent fluorescence spectrophotometer. The two sealing rings 25 are positioned one above the other to tightly clamp the sealing cap 6 to the top of the water sample bottle 2, thereby achieving a complete seal on the top opening of the water sample bottle 2 and improving the sealing effect.

[0045] Reference Figures 1 to 6As shown, each filter device 7 is fixedly equipped with a sample dispensing tube 26 at its top. In wastewater testing, it is necessary to determine what types of pollutants are in the wastewater, which requires the use of a fluorescence spectrophotometer for detection. However, the wastewater sample needs to be pre-treated before fluorescence detection can be performed. When the wastewater pretreatment is carried out, the extracted water sample is first poured into the interior of the filter device 7 through the sample dispensing tube 26. The top of the sample dispensing tube 26 is designed in the shape of a funnel to facilitate the rapid entry of the water sample into the filter device 7, which helps to improve the efficiency of water sample dispensing.

Claims

1. A pretreatment device for detecting water samples using a fluorescence spectrophotometer, comprising a base and a controller (1), wherein the controller (1) is disposed on the top of the base, characterized in that: It also includes a filtration system, a dilution system, and a treatment system; The processing mechanism is located on the top of the base. The processing mechanism includes a vacuum assembly, a stirring assembly and several water sample bottles (2). Several water sample bottles (2) are symmetrically arranged on the top of the base. The stirring assembly is located inside the several water sample bottles (2). The vacuum assembly is located between the base and the several water sample bottles (2). The dilution mechanism is located on the top of the base. The dilution mechanism includes a water storage tank (3), a liquid metering pump (4), and a diversion assembly. The water storage tank (3) is fixedly located on the top of the base. The diversion assembly is located between several sample addition assemblies. The liquid metering pump (4) is fixedly located between the water storage tank (3) and the diversion assembly. The filtration mechanism is located above the processing mechanism. The filtration mechanism includes several filter membranes (5) and several sample feeding components. Each water sample bottle (2) is fitted with a sealing cap (6) on top. Each sample feeding component is located on top of a sealing cap (6). Each filter membrane (5) is located on a sample feeding component. The vacuum component, stirring component, diversion component and each sample feeding component are electrically connected to the controller (1).

2. The pretreatment device for fluorescent spectrophotometer detection of water samples according to claim 1, characterized in that: Each sample feeding assembly includes a filter device (7), a delivery pipe (8), a first solenoid valve (9), and a second solenoid valve (10). A support frame is fixedly provided on the top of the base. The filter device (7) is fixedly provided on the support frame. Each sealing cap (6) has a water inlet on its top. Each filter device (7) has a water outlet at its bottom. The delivery pipe (8) is fixedly provided between the water outlet and the water inlet. The first solenoid valve (9) is fixedly provided on the outer wall of the delivery pipe (8) near the filter device (7). The second solenoid valve (10) is fixedly provided on the outer wall of the delivery pipe (8) near the sealing cap (6). An annular plate (11) for installing the filter membrane (5) is fixedly provided inside the filter device (7). The first solenoid valve (9) and the second solenoid valve (10) are both electrically connected to the controller (1).

3. The pretreatment apparatus for fluorescent spectrophotometer detection of water samples according to claim 2, characterized in that: The stirring assembly includes several magnetic stirrers (12), each magnetic stirrer (12) is rotatably mounted on the inner bottom of a water sample bottle (2), and each water sample bottle (2) is provided with a liquid level sensor (13) on its inner wall. Each magnetic stirrer (12) and each liquid level sensor (13) are electrically connected to the controller (1).

4. The pretreatment apparatus for fluorescent spectrophotometer detection of water samples according to claim 3, characterized in that: The vacuum assembly includes a vacuum pump (14), a suction pipe (15), and several first branch pipes (16). The vacuum pump (14) is fixedly mounted on the top of the base. The first branch pipes (16) are fixedly mounted on their input ends via quick connectors. Several first branch pipes (16) are fixedly mounted between the suction pipe (15) and several water sample bottles (2). Each first branch pipe (16) has a third solenoid valve (17) fixedly mounted on the outer wall of one end near the water sample bottle (2). The vacuum pump (14) and each third solenoid valve (17) are electrically connected to the controller (1).

5. The pretreatment apparatus for fluorescent spectrophotometer detection of water samples according to claim 4, characterized in that: The diversion assembly includes an inlet pipe (18), several second branch pipes (19), several fourth solenoid valves (20) and several fifth solenoid valves (21). The bottom of the water storage tank (3) is provided with a drain pipe (22). The input end of the liquid metering pump (4) is fixedly connected to the drain pipe (22). The inlet pipe (18) is fixedly installed on the output end of the liquid metering pump (4). Several second branch pipes (19) are fixedly installed between the bottom of the inlet pipe (18) and several delivery pipes (8). Several fourth solenoid valves (20) are equally spaced on the outer wall of the inlet pipe (18). Each fifth solenoid valve (21) is fixedly installed on the outer wall of each second branch pipe (19). Each fourth solenoid valve (20) and each fifth solenoid valve (21) are electrically connected to the controller (1).

6. The pretreatment apparatus for fluorescent spectrophotometer detection of water samples according to claim 5, wherein: Each water sample bottle (2) has a drain tube (23) fixed on the bottom outer wall, and each drain tube (23) has a manual valve (24) on its outer wall.

7. The pretreatment apparatus for fluorescent spectrophotometer detection of water samples according to claim 6, wherein: Each sealing cap (6) has a sealing ring (25) fitted on its bottom and top outer walls.

8. The pretreatment device for water sample detection by a fluorescence spectrophotometer according to claim 7, characterized in that: Each filter device (7) is fixedly equipped with a sample addition tube (26) at the top.

Images