Ultraviolet and visible spectrophotometer for water pollution detection and detection method

Abstract

The invention relates to the technical field of water pollution detection, in particular to an ultraviolet and visible spectrophotometer for water pollution detection and a detection method.The ultraviolet and visible spectrophotometer comprises an ultraviolet and visible spectrophotometer body, a motor, a sliding assembly, a colorimetric stand, a cuvette, a cleaning assembly and a spray head; the ultraviolet and visible spectrophotometer body is provided with a detection area, the detection area is provided with a detection window, one side of the detection area is provided with an extrusion cavity, and a motor is fixedly mounted in the detection area; a sliding assembly is arranged on the motor, a colorimetric frame is mounted on the sliding assembly, cuvettes are arranged on the colorimetric frame in a linear array manner, and the motor drives the colorimetric frame to slide at equal intervals through the sliding assembly; a cleaning assembly is arranged on one side of the sliding assembly and connected with the nozzle, and the nozzle is driven to spray air through the cleaning assembly when the sliding assembly slides at equal intervals; according to the detection device, multiple samples can be detected at a time through rotation movement, meanwhile, the detection window is cleaned, the detection efficiency is improved, and the detection precision is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of water pollution detection technology, specifically to an ultraviolet-visible spectrophotometer and detection method for water pollution detection.

[0002] Background Technology It is necessary to test various water qualities, identify problems in a timely manner, and take corresponding measures to improve them, so as to ensure that people use water resources safely and healthily.

[0003] The ultraviolet-visible spectrophotometer mainly consists of a light source, a monochromator, a cuvette, a detector, and a signal processor. In use, the sample is poured into the cuvette, which is then placed in the cuvette holder inside the spectrophotometer for fixation. The spectrophotometer is then started, and the light source emits incident light. This incident light is decomposed into a monochromatic beam by the monochromator. The monochromatic beam passes through the cuvette, where the sample absorbs it, causing a decrease in the monochromatic light intensity. The detector converts this intensity into an electrical signal, which is then sent to the signal processor for display, thus determining the water pollution result.

[0004] When conducting outdoor water pollution testing of rivers and lakes, multi-area sampling is required. When testing samples, the photometer needs to be frequently turned on and the samples need to be changed, making the testing process cumbersome and inefficient. At the same time, frequent turning on of the photometer can easily cause dust in the environment to enter the photometer and adhere to the optical instrument, thereby reducing the light transmission and causing inaccurate water pollution detection.

[0005] In view of this, we propose an ultraviolet-visible spectrophotometer and detection method for water pollution detection. Summary of the Invention

[0006] The purpose of this invention is to provide a UV-Vis spectrophotometer and detection method for water pollution detection, so as to solve the problem of low detection efficiency of UV-Vis spectrophotometers mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A UV-Vis spectrophotometer for water pollution detection includes: a UV-Vis spectrophotometer body, a motor, a sliding assembly, a colorimetric holder, cuvettes, a cleaning assembly, and a nozzle. The UV-Vis spectrophotometer body has a detection area with a detection window. The detection area is used to place the water sample to be tested, and the water sample is placed directly in front of the detection window for testing. A squeezing chamber communicating with the detection area is located on one side of the detection area and is connected to the outside. A motor is fixedly installed within the detection area. The motor has a sliding assembly, and a colorimetric holder is mounted on the sliding assembly. Cuvettes are linearly arranged on the colorimetric holder. The motor drives the colorimetric holder to slide equidistantly through the sliding assembly, thereby driving the cuvettes to sequentially pass through the detection window. During testing, the motor-driven sliding assembly moves the cuvette at equal intervals, causing the cuvettes fixed on it to sequentially stop and pass in front of the testing window, thus completing the testing of multiple samples at once, improving testing efficiency and avoiding the reduction in testing efficiency caused by frequent cuvette replacements. A cleaning assembly is provided on one side of the sliding assembly, which is located inside the extrusion chamber and connected to the nozzle. The nozzle is located on one side of the testing window. When the sliding assembly moves at equal intervals, it drives the nozzle to spray air through the cleaning assembly. The nozzle is located between the cuvette and the testing window. When the sliding assembly moves the cuvette, it drives the nozzle to spray air through the cleaning assembly to clean the testing window, thus preventing dust adhering to the cuvettes and testing window from affecting the testing accuracy.

[0008] Preferably, the colorimetric device consists of a frame and a cover plate. The frame has a linear array of fixing slots, and detection slots are symmetrically formed on both sides of the fixing slots. The other two sides of the fixing slots have a grid array of friction protrusions. The fixing slots are used to fix and place cuvettes. There are multiple fixing slots. The first fixing slot is used to place a cuvette containing blank reagents, i.e., the fixing slot closest to the nozzle. Subsequent fixing slots are used to place water samples from different areas. The cuvettes are divided into rough and smooth surfaces. When installing the cuvettes, the smooth surface of the cuvette is installed in accordance with the detection slot for detection, while the rough surface is installed in accordance with the friction protrusions to ensure the stability of the installation. The frame is detachably connected to a cover plate, which is used to seal the cuvettes and fix the upper part of the cuvettes. At the same time, the cover plate seals the cuvettes, thereby ensuring the cleanliness of the water samples inside the cuvettes and preventing dust from being blown into the cuvettes during nozzle cleaning, which would affect the detection results.

[0009] Preferably, the sliding assembly includes a drive shaft, a bushing, a fixing plate, a vibrating block, and a vibrating rod; the drive shaft is fixedly connected to a motor, and the front end of the drive shaft is threaded, with a bushing slidably mounted on the drive shaft; the bushing has a threaded groove that mates with the thread, and the bushing is slidably mounted in the detection area. The detection area fixes both sides of the bushing through its inner wall, thereby restricting the bushing's degree of freedom, allowing it to slide only in a straight line. When the cuvette to be tested needs to be replaced, the motor starts rotating forward, thereby driving the drive shaft to rotate synchronously. The drive shaft drives the bushing to slide horizontally through the threaded transmission, and the bushing slides along the nozzle direction. A fixing plate is fixedly mounted on the bushing; the fixing plate is connected to the frame, and the fixing plate has two sides that... The device is equipped with vibrating blocks; the vibrating blocks are linearly arrayed on a fixed plate, and a vibrating rod is provided on one side of each vibrating block; the vibrating rod is fixedly installed in the detection area, and when the bushing slides, it drives the fixed plate to slide synchronously, which in turn drives the colorimetric holder fixed on it to slide synchronously, thereby causing the cuvettes in the colorimetric holder to stop and be detected one by one in front of the detection window; at the same time, during the sliding of the fixed plate, the vibrating blocks on the fixed plate come into contact with the vibrating rod in the detection area, thereby generating vibration, which is transmitted through the fixed plate to the colorimetric holder, and then to the cuvettes. The cuvettes are subjected to vibration, which in turn drives the water sample in the cuvettes to oscillate slightly, thereby driving the components in the water sample to be evenly distributed, thus avoiding the precipitation of substances in the water sample, which would lead to poor detection accuracy.

[0010] Preferably, the fixed plate is provided with a conductive column, and the frame is provided with a conductive groove that cooperates with the conductive column. The conductive groove is located at the gap of the fixed groove and is at the same height as the detection groove. The conductive column on the fixed plate is used to improve the transmission efficiency of vibration. The conductive column is similar to the tip of a tuning fork. When the bottom of the tuning fork is struck to generate vibration, the tip of the tuning fork is the area of ​​the strongest vibration, thereby improving the transmission efficiency of the conductive column and ensuring the vibration intensity of the water sample in the cuvette. At the same time, the top of the conductive column is flush with the top of the detection groove, ensuring that the water sample in the detection groove area can be vibrated and ensuring the vibration intensity, thereby ensuring the uniformity of the water sample and improving the detection accuracy.

[0011] Preferably, the vibrating block has a hemispherical structure; the vibrating block is located on both sides of the transmission column and corresponds to the transmission column. The hemispherical structure of the vibrating block reduces the friction between the vibrating block and the vibrating rod, thereby facilitating relative sliding between the vibrating block and the vibrating rod. At the same time, the area where the vibrating block is located corresponds to the transmission column, thereby reducing the transmission distance between the vibrating block and the transmission column, thus ensuring the vibration intensity.

[0012] Preferably, the cleaning assembly includes a top rod, a linkage mechanism, an airbag, a one-way exhaust valve, a one-way intake valve, and a filter screen; the top rod is fixedly connected to a fixed plate, and multiple sets of linkage mechanisms are symmetrically arranged on both sides of the top rod, with push grooves symmetrically opened on the top rod for driving the linkage mechanisms; the linkage mechanism fits into the airbag; the airbag is fixedly installed in the compression chamber, and a one-way exhaust valve and a one-way intake valve are respectively installed on the airbag, which is connected to the nozzle through the one-way exhaust valve; when the fixed block slides along the nozzle direction, the fixed block drives the top rod to slide synchronously, and the top rod pushes the linkage mechanism to slide through the push groove, and the linkage mechanism slides relative to the airbag, thereby compressing the airbag and transmitting the gas in the airbag to the nozzle through the one-way exhaust valve for spraying out to detect the detection window; The airbag is connected to the outside world through a one-way air intake valve, which is fixedly connected to the compression chamber. A filter screen is provided on one side of the one-way air intake valve, and the filter screen is fixedly connected to the compression chamber. The one-way air intake valve is used for the reset of the airbag. After the water quality sample is tested, the motor reverses and drives the mechanism to reset. At this time, the push rod no longer compresses and pushes the linkage mechanism. At this time, the linkage mechanism no longer compresses the airbag, and the airbag begins to draw in gas from the outside through the one-way air intake valve to reset. The airbag pushes the linkage mechanism to reset. The one-way air intake valve and the one-way air outlet valve restrict the flow direction of the gas, thereby ensuring the stable operation of the airbag's exhaust and intake. When the airbag is inhaling, the filter screen filters the incoming gas, thereby ensuring the cleanliness of the gas and preventing impurities in the outside gas from being sent into the detection area, which would affect the detection accuracy.

[0013] Preferably, the linkage mechanism includes a driving rod and a driven rod; the driving rod is symmetrically arranged on both sides of the top rod and slidably connected to the detection area; one end of the driving rod has a push groove that cooperates with the top rod, and the other side of the driving rod has a squeezing groove, and the driven rod is vertically arranged thereon; the driven rod is slidably installed with the detection area, one end of the driven rod has a squeezing groove that cooperates with the driving rod, and the other end of the driven rod is located in the squeezing chamber and fits against the airbag. When the fixed plate drives the top rod to slide synchronously towards the airbag, the top rod squeezes the driving rod to slide horizontally through the push groove. When the driving rod slides, it pushes the driven rod to slide along the airbag direction through the squeezing groove, thereby squeezing the airbag and driving the gas to be ejected from the nozzle. The bottom of both the driving rod and the driven rod is provided with a limiting slider, and the inner wall of the detection area is provided with a limiting groove corresponding to the limiting slider. The driving rod and the driven rod are slidably connected to the detection area through the mutual cooperation of the limiting slider and the limiting groove.

[0014] Preferably, the driven rod has a pressure-increasing surface at its front end. The pressure-increasing surface is used to increase the contact area between the driven rod and the airbag, thereby enhancing the compression area of ​​the airbag, ensuring the amount of air sprayed by the nozzle, and thus ensuring the cleaning effect on the detection window.

[0015] Preferably, a guide vane is fixedly connected to the rear end of the drive shaft, and the guide vane is installed on the opposite side of the nozzle. When the drive shaft rotates, it drives the guide vane to rotate synchronously, thereby guiding the gas in the detection area. When the nozzle sprays gas, the gas blows the dust off the detection window. At this time, the guide vane guides the gas, thereby guiding the dust towards itself, preventing the dust from adhering to the cuvette and cuvette holder, which would affect the detection accuracy.

[0016] A UV-Vis spectrophotometer detection method includes the following steps: Step 1: Start and preheat the UV-Vis spectrophotometer body; First, start the UV-Vis spectrophotometer body to preheat for 30 minutes to ensure that the light source, electronic components and mechanical system reach thermal equilibrium, thereby obtaining stable and accurate measurement results; Step 2: Place the blank reagent and water samples from different areas into different cuvettes; Staff members hold the rough side of the cuvettes and pour blank reagents and water samples from different areas into different cuvettes, then number the cuvettes and wipe the smooth side of the cuvettes to ensure cleanliness. Step 3: Place the cuvettes for the blank reagent and the water sample into the testing rack in sequence; First, place the cuvette containing the blank reagent into the first fixed slot of the cuvette holder, and then place the cuvettes containing the water quality samples into the fixed slots in sequence according to the cuvette numbers; Step 4: The UV-Vis spectrophotometer body detects the blank reagent; Staff close the testing area, and the ultraviolet-visible spectrophotometer emits a monochromatic light beam through a monochromatic mirror. The monochromatic light beam is then used to test the blank reagent in the detection slot on the colorimeter holder, thereby generating a data graph for comparison with the water quality sample. Step 5: The motor drives the colorimeter holder to slide at equal intervals through the sliding assembly, and tests the water quality samples in sequence; After the blank reagent test is completed, the motor drives the colorimetric holder to slide for the first time through the sliding component, sliding the cuvette numbered 1 to the front of the detection window for testing, generating the first water quality sample data graph. Then, the motor drives the colorimetric holder to slide for the second time through the sliding component, testing the cuvette numbered 2, and so on to complete the testing of all cuvettes. Step 6: During each sliding motion of the sliding component, the nozzle is driven by the cleaning component to spray air to clean the detection window; When the sliding component drives the colorimeter holder to slide, the sliding component cleans the detection window by driving the nozzle to spray air through the cleaning component, thereby ensuring the detection accuracy of water quality samples; Step 7: After the test is completed, remove the cuvette and clean it. After the water quality sample is tested, the staff opens the detection area of ​​the UV-Vis spectrophotometer, then starts the motor to reverse and drive the colorimeter holder to reset, and then removes the cuvette from the colorimeter holder for cleaning.

[0017] Compared with the prior art, the beneficial effects of the present invention are: An ultraviolet-visible spectrophotometer and detection method for water pollution detection are disclosed. The invention ensures the uniformity of water samples and the cleanliness of the detection window through the cooperation of a sliding component and a cleaning component, thereby ensuring the accuracy of water sample detection.

[0018] An ultraviolet-visible spectrophotometer and detection method for water pollution detection are disclosed. The present invention enables the detection of multiple water quality samples at one time through a sliding component, thereby improving the efficiency of water quality sample detection. At the same time, vibration of the water quality sample ensures the uniformity of the components within the water quality sample and guarantees the detection accuracy.

[0019] An ultraviolet-visible spectrophotometer and detection method for water pollution detection are disclosed. The invention achieves the unification of detection and cleaning through a cleaning component, so that the detection window is cleaned before each water sample is tested, thereby ensuring the cleanliness of the detection window and guaranteeing detection accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall body of the ultraviolet-visible spectrophotometer of the present invention; Figure 2 This is a half-sectional schematic diagram of the ultraviolet-visible spectrophotometer body of the present invention; Figure 3 For the present invention Figure 2 A magnified view of point A; Figure 4 For the present invention Figure 2 A magnified view of point B; Figure 5 This is a schematic diagram of the sliding component and cleaning component of the present invention; Figure 6 This is a half-sectional schematic diagram of the sliding component of the present invention; Figure 7 For the present invention Figure 6 A magnified view of part C; Figure 8 This is an overall view of the cleaning components of the present invention; Figure 9 This is a half-sectional schematic diagram of the cleaning component of the present invention; Figure 10 This is a half-section schematic diagram of the detection area of ​​the present invention; Figure 11 For the present invention Figure 10 A magnified view of point D.

[0021] In the picture: 1. Ultraviolet-Vis spectrophotometer body; 11. Detection area; 111. Detection window; 12. Squeezing chamber; 2. Electric motor; 3. Sliding assembly; 31. Drive shaft; 311. Drainage vane; 32. Bushing; 33. Fixing plate; 331. Conducting column; 34. Vibrating block; 341. Hemispherical structure; 35. Vibrating rod; 4. Colorimeter rack; 41. Frame; 411. Fixing slot; 412. Testing slot; 413. Transmission slot; 42. Cover plate; 5. Cuvettes; 6. Cleaning assembly; 61. Top rod; 611. Push groove; 62. Linkage mechanism; 621. Driving rod; 6211. Extrusion groove; 622. Driven rod; 6222. Pressure boosting surface; 63. Airbag; 64. One-way exhaust valve; 65. One-way intake valve; 66. Filter screen; 7. Spray nozzle. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] An ultraviolet-visible spectrophotometer is an instrument that analyzes radiation absorbed by molecules in the ultraviolet-visible spectral region. It mainly consists of a light source, monochromator, cuvette, detector, and signal processor. The light source provides the required incident light and is divided into two categories: thermal radiation sources and gas discharge sources. Thermal radiation sources are used in the visible light region and are generally tungsten lamps or halogen tungsten lamps, with a wavelength range of 350-1000 nm. Gas discharge sources are used in the ultraviolet light region and are generally hydrogen lamps or deuterium lamps, with a continuous wavelength range of 180-360 nm. The monochromator decomposes the composite light generated by the light source into monochromatic light and separates the desired monochromatic beam. The cuvette is used to hold blank liquids and samples for detection. The bottom and sides of the cuvette are made of frosted glass, while the other two sides are optically transparent. To reduce light reflection loss, the optical surface of the absorption cell must be completely perpendicular to the beam direction. Based on the material, cuvettes can be divided into two types: glass cuvettes and quartz cuvettes. The former is used for measurements in the visible light region, while the latter is used in the ultraviolet light region. When a monochromatic light beam passes through a cuvette, the liquid in the cuvette absorbs the monochromatic light beam, which in turn reduces the light intensity of the monochromatic light beam. The detector receives the light intensity of the absorbed monochromatic light beam and converts it into an electrical signal. The signal display system amplifies the electrical signal output by the detector and displays it.

[0024] The ultraviolet-visible spectrophotometer mainly consists of a light source, a monochromator, cuvettes, a detector, and a signal processor. In use, blank reagent and water sample are poured into separate cuvettes. First, the cuvette containing the blank reagent is placed inside the spectrophotometer and fixed with a cuvette holder. The incident light emitted by the light source is decomposed into a monochromatic beam by the monochromator. This monochromatic beam illuminates the cuvette and passes through the blank reagent within it. The substances in the blank reagent absorb the monochromatic beam. The detector receives the intensity of the absorbed monochromatic beam and converts it into an electrical signal, which is then sent to the signal processor for display. Next, the blank reagent is removed and placed into the sample cuvette. After the above process, the light intensity result is displayed by the signal processor and compared with the result of the blank reagent, thus determining the water pollution result.

[0025] However, when conducting outdoor water pollution testing in rivers and lakes, multi-area sampling is required, that is, sampling and testing in different areas of a river or lake. When testing samples, the photometer needs to be turned on frequently to change samples, which leads to excessively long testing time and low testing efficiency. At the same time, frequent turning on of the photometer can easily cause dust in the environment to enter the photometer and adhere to the optical instrument, thereby reducing the light transmission and causing inaccurate water pollution detection.

[0026] The present invention provides a technical solution: like Figures 1 to 11 As shown, a UV-Vis spectrophotometer and detection method for water pollution detection are described: A UV-Vis spectrophotometer for water pollution detection includes: a UV-Vis spectrophotometer body 1, a motor 2, a sliding assembly 3, a colorimetric holder 4, a cuvette 5, a cleaning assembly 6, and a nozzle 7; the UV-Vis spectrophotometer body 1 has a detection area 11, a detection window 111, and a squeezing chamber 12 communicating with the detection area 11 on one side, the squeezing chamber 12 communicating with the outside; the motor 2 is fixedly installed inside the detection area 11; the motor 2 is equipped with a sliding assembly. Component 3, the sliding assembly 3 is equipped with a colorimeter holder 4, and colorimeter cuvettes 5 are arranged in a linear array on the colorimeter holder 4. The motor 2 drives the colorimeter holder 4 to slide at equal intervals through the sliding assembly 3, thereby driving the colorimeter cuvettes 5 to pass through the detection window 111 in sequence. A cleaning assembly 6 is provided on one side of the sliding assembly 3. The cleaning assembly 6 is located in the extrusion chamber 12. The cleaning assembly 6 is connected to the nozzle 7. The nozzle 7 is located on one side of the detection window 111. When the sliding assembly 3 slides at equal intervals, the cleaning assembly 6 drives the nozzle 7 to spray air. Specifically, the UV-Vis spectrophotometer body 1 has a detection area 11, and a detection window 111 is provided on the detection area 11. The detection area 11 is used to place the water sample to be tested. The water sample is placed directly in front of the detection window 111 for testing. A power supply and a monochromatic mirror are provided behind the detection window 111. The monochromatic mirror decomposes the light beam into monochromatic beams, which are then emitted through the detection window 111 and pass through the water sample. A squeezing chamber 12 is provided on one side of the detection area 11 and communicates with it. The squeezing chamber 12 is connected to the outside. A motor 2 is fixedly installed inside the detection area 11. A sliding assembly 3 is provided on the motor 2, and a colorimeter holder 4 is installed on the sliding assembly 3. Cuvettes 5 are arranged in a linear array on the colorimeter holder 4. The motor 2 is connected to the external environment. The sliding component 3 drives the cuvette 4 to slide at equal intervals, thereby driving the cuvettes 5 to pass through the detection window 111 in sequence. The cuvettes 5 are used to hold blank reagents and water samples from various areas. After the blank reagents and water samples are injected, the cuvettes 5 are numbered and placed into the cuvette 4 for fixation. During detection, the motor 2 drives the sliding component to move the cuvette 4 at equal intervals. The cuvette 4 drives the cuvettes 5 fixed on it to stop and pass through the detection window 111 in sequence, thereby completing the detection of multiple samples at once, improving detection efficiency, avoiding frequent replacement of cuvettes 5 which would reduce detection efficiency, and avoiding frequent opening and closing of the UV-Vis spectrophotometer body 1, which would cause dust to enter and affect detection accuracy. A cleaning component 6 is provided on one side of the sliding assembly 3. The cleaning component 6 is located inside the extrusion chamber 12 and is connected to the nozzle 7. The nozzle 7 is located on one side of the detection window 111. When the sliding assembly 3 slides at equal intervals, it drives the nozzle 7 to spray air through the cleaning component 6. The nozzle 7 is located between the colorimeter holder 4 and the detection window 111. When the sliding assembly 3 moves the colorimeter holder 4, it drives the nozzle 7 to spray air through the cleaning component 6 to clean the detection window 111, thereby preventing dust from adhering to the cuvette 5 and the detection window 111 and affecting the detection accuracy. At the same time, the detection and cleaning are synchronized. Every time the colorimeter holder 4 moves a cuvette 5 to stop in front of the detection window 111 for detection, the sliding assembly 3 will drive the nozzle 7 to spray air once during the sliding process to clean it. Thus, before each cuvette 5 is detected, the nozzle 7 will spray air to clean the detection window 111. Preferably, the nozzle 7 can be an adjustable-angle nozzle 7 as in the prior art, which makes it easy to adjust the angle of the nozzle 7 to find the most suitable cleaning angle.

[0027] In this embodiment, the colorimeter is composed of a frame 41 and a cover plate 42. The frame 41 has a linear array of fixing grooves 411. The fixing grooves 411 are symmetrically provided with detection grooves 412 on both sides. The fixing grooves 411 have a grid array of friction protrusions on the other two sides. The fixing grooves 411 are used to fix and place the colorimeter 5. Specifically, multiple fixing slots 411 are provided. The first fixing slot 411 is used to place the cuvette 5 containing blank reagents, i.e., the fixing slot 411 closest to the nozzle 7. Subsequent fixing slots 411 are used to place water samples from different areas. The cuvette 5 has a rough surface and a smooth surface. When installing the cuvette 5, the smooth surface of the cuvette 5 is installed corresponding to the detection slot 412 for detection. At the same time, the rough surface is installed corresponding to the friction protrusions to ensure the stability of the installation. During detection, a monochromatic light beam passes through the cuvette 5 through the detection slot 412 and targets the water sample. The water sample absorbs the monochromatic light beam. This completes the detection. Meanwhile, the roughness of the surface of the cuvette 5 is relatively large, which, together with the friction protrusions on the inner wall of the fixing groove 411, enhances the friction between the cuvette 5 and the cuvette holder 4, thereby enhancing the stability of the installation of the cuvette holder 4 and the cuvette 5. A cover plate 42 is detachably connected to the holder 41. The cover plate 42 is used to seal the cuvette 5 and to fix the upper end of the cuvette 5. At the same time, sealing the cuvette 5 ensures the cleanliness of the water sample inside the cuvette 5 and prevents dust from being blown into the cuvette 5 during the spray cleaning by the nozzle 7, which would affect the detection results.

[0028] In this embodiment, the sliding assembly 3 includes a drive shaft 31, a bushing 32, a fixing plate 33, vibrating blocks 34, and a vibrating rod 35. The drive shaft 31 is fixedly connected to the motor 2. The front end of the drive shaft 31 is threaded, and the bushing 32 is slidably mounted on the drive shaft 31. The bushing 32 has a threaded groove that mates with the thread. The bushing 32 is slidably mounted in the detection area 11, and the fixing plate 33 is fixedly mounted on the bushing 32. The fixing plate 33 is connected to the frame 41, and the vibrating blocks 34 are symmetrically arranged on both sides of the fixing plate 33. The vibrating blocks 34 are linearly arrayed on the fixing plate 33, and a vibrating rod 35 is provided on one side of each vibrating block 34. The vibrating rod 35 is fixedly mounted in the detection area 11. Specifically, the drive shaft 31 is fixedly connected to the motor 2. The front end of the drive shaft 31 has a thread, and a bushing 32 is slidably mounted on the drive shaft 31. The bushing 32 has a threaded groove that mates with the thread. The bushing 32 is slidably mounted within the detection area 11. The detection area 11 fixes both sides of the bushing 32 through its inner wall, thus restricting the freedom of the bushing 32, allowing it to slide only in a straight line. When the cuvette 5 to be tested needs to be replaced, the motor 2 starts rotating forward, thereby driving the drive shaft 31 to rotate synchronously. The drive shaft 31... The threaded drive shaft 31 slides horizontally, and the bushing 32 slides along the nozzle 7. Preferably, the motor 2 can be a continuously variable motor 2 of existing technology, thereby ensuring the smoothness of the sliding and stopping of the colorimeter holder 4, and thus avoiding violent shaking of the liquid in the colorimeter cuvette 5 due to inertia. At the same time, the use of threaded drive improves the transmission accuracy and achieves equidistant sliding. The sliding distance of the threaded drive is obtained by multiplying the number of rotations by the thread lead, and the thread lead is fixed before production. The distance between the colorimeter cuvettes 5 is also fixed, so only control is needed. The number of rotations of motor 2 is sufficient to achieve equidistant sliding. A fixed plate 33 is fixedly installed on the bushing 32. The fixed plate 33 is connected to the frame 41, and vibration blocks 34 are symmetrically arranged on both sides of the fixed plate 33. The vibration blocks 34 are linearly arrayed on the fixed plate 33, and a vibration rod 35 is provided on one side of the vibration block 34. The vibration rod 35 is fixedly installed in the detection area 11. When the bushing 32 slides, it drives the fixed plate 33 to slide synchronously. The fixed plate 33 then drives the colorimeter holder 4 fixed on it to slide synchronously, thereby driving the cuvettes 5 in the colorimeter holder 4 to move one by one in front of the detection window 111. The detection process involves a stationary phase. Simultaneously, during the sliding of the fixed plate 33, the vibrating block 34 on the fixed plate 33 contacts the vibrating rod 35 in the detection area 11, thereby generating vibration. The vibration is transmitted through the fixed plate 33 to the colorimetric holder 4, and then to the cuvette 5. The cuvette 5 is subjected to vibration, which in turn drives the water sample in the cuvette 5 to oscillate slightly, thereby driving the components in the water sample to be evenly distributed, thus avoiding the precipitation of substances in the water sample, which would lead to poor detection accuracy. The vibrating block 34 and the vibrating rod 35 are made of elastic materials, such as rubber.

[0029] In this embodiment, the fixing plate 33 is provided with a transmission column 331, and the frame 41 is provided with a transmission groove 413 that cooperates with the transmission column 331. The transmission groove 413 is located at the gap of the fixing groove 411 and is at the same height as the detection groove 412. Specifically, the conduction column 331 on the fixed plate 33 is used to improve the transmission efficiency of vibration. The conduction column 331 is similar to the tip of a tuning fork. When the bottom of the tuning fork is struck to generate vibration, the tip of the tuning fork is the area with the strongest vibration, thereby improving the transmission efficiency of the conduction column 331 and ensuring the vibration intensity of the water sample in the cuvette 5. At the same time, the top of the conduction column 331 is flush with the top of the detection groove 412, ensuring that the water sample in the detection groove 412 area can be vibrated and ensuring the vibration intensity, thereby ensuring the uniformity of the water sample and improving the detection accuracy.

[0030] In this embodiment, the vibration block 34 is a hemispherical structure 341; the vibration block 34 is located on both sides of the conduction column 331 and corresponds to the conduction column 331; Specifically, the vibrating block 34 adopts a hemispherical structure 341 to reduce the friction between the vibrating block 34 and the vibrating rod 35, thereby facilitating relative sliding between the vibrating block 34 and the vibrating rod 35. At the same time, the area where the vibrating block 34 is located corresponds to the transmission column 331, thereby reducing the transmission distance between the vibrating block 34 and the transmission column 331, thus ensuring the vibration intensity. Furthermore, the correspondence between the vibrating block 34 and the transmission column 331 ensures that there is no vibrating block 34 in the area of ​​the fixing groove 411, thereby avoiding the problem that the vibrating block 34 and the vibrating rod 35 will squeeze each other during the test, which would cause the colorimeter holder 4 to tilt slightly, and then cause the cuvette 5 to tilt synchronously, resulting in a deviation in the verticality of the cuvette 5 and a decrease in the test accuracy.

[0031] In this embodiment, the cleaning assembly 6 includes a top rod 61, a linkage mechanism 62, an airbag 63, a one-way air outlet valve 64, a one-way air inlet valve 65, and a filter screen 66. The top rod 61 is fixedly connected to the fixing plate 33. Multiple sets of linkage mechanisms 62 are symmetrically arranged on both sides of the top rod 61. Push grooves 611 for driving the linkage mechanisms 62 are symmetrically opened on the top rod 61. The linkage mechanism 62 is in contact with the airbag 63. The airbag 63 is fixedly installed in the squeezing chamber 12. A one-way air outlet valve 64 and a one-way air inlet valve 65 are respectively installed on the airbag 63. The airbag 63 is connected to the nozzle 7 through the one-way air outlet valve 64. The airbag 63 is connected to the outside through the one-way air inlet valve 65. The one-way air inlet valve 65 is fixedly connected to the squeezing chamber 12. A filter screen 66 is provided on one side of the one-way air inlet valve 65. The filter screen 66 is fixedly connected to the squeezing chamber 12. Specifically, the push rod 61 is fixedly connected to the fixed plate 33. Multiple sets of linkage mechanisms 62 are symmetrically arranged on both sides of the push rod 61. Push grooves 611 for driving the linkage mechanisms 62 are symmetrically opened on the push rod 61. The linkage mechanisms 62 are fitted into the airbag 63. The airbag 63 is fixedly installed in the extrusion chamber 12. A one-way exhaust valve 64 and a one-way intake valve 65 are respectively installed on the airbag 63. The airbag 63 is connected to the nozzle 7 through the one-way exhaust valve 64. When the fixed block slides along the direction of the nozzle 7, the fixed block drives the push rod 61 to slide synchronously. The push rod 61 pushes the linkage mechanisms 62 through the push grooves 611. The linkage mechanism 62 slides relative to the airbag 63, thereby compressing the airbag 63 and transmitting the gas inside the airbag 63 to the nozzle 7 through the one-way exhaust valve 64 for spraying out to detect the detection window 111. The number of linkage mechanisms 62 is consistent with the number of sample detection slots 412 on the colorimetric holder 4, so that before each water sample is tested, the top rod 61 pushes the linkage mechanism 62 corresponding to the colorimetric cuvette 5, thereby compressing the airbag 63 and causing the nozzle 7 to spray air for cleaning, achieving uniformity of detection and cleaning. The airbag 63 is connected to the outside through the one-way intake valve 65. One-way air inlet valve 65 is fixedly connected to the squeezing chamber 12. A filter screen 66 is provided on one side of the one-way air inlet valve 65, and the filter screen 66 is fixedly connected to the squeezing chamber 12. The one-way air inlet valve 65 is used for the reset of the airbag 63. After the water quality sample is tested, the motor 2 reverses to drive the mechanism to reset. At this time, the push rod 61 no longer squeezes and pushes the linkage mechanism 62. At this time, the linkage mechanism 62 no longer squeezes the airbag 63, and the airbag 63 begins to draw in gas from the outside through the one-way air inlet valve 65 to reset. The airbag 63 pushes the linkage mechanism 62 to reset. The one-way air inlet valve 65 and the one-way air outlet valve 64 regulate the direction of gas flow. The system restricts the airbag 63 to ensure stable operation during air intake and exhaust. When the airbag 63 is compressed, the one-way inlet valve 65 prevents the gas inside the airbag 63 from being discharged, and the gas inside the airbag 63 can only be discharged through the one-way outlet valve 64. When the airbag 63 is no longer compressed and is inhaling, the one-way outlet valve 64 prevents the airflow from entering through the nozzle 7, and the airflow can only enter through the one-way inlet valve 65. When the airbag 63 is inhaling, the filter screen 66 filters the incoming gas, thereby ensuring the cleanliness of the gas and preventing impurities in the external gas from being sent into the detection area 11, which would affect the detection accuracy.

[0032] In this embodiment, the linkage mechanism 62 includes a driving rod 621 and a driven rod 622. The driving rod 621 is symmetrically arranged on both sides of the top rod 61 and is slidably connected to the detection area 11. One end of the driving rod 621 has a push groove 611 that cooperates with the top rod 61, and the other side of the driving rod 621 has a squeezing groove 6211. The driven rod 622 is vertically arranged thereon. The driven rod 622 is slidably installed with the detection area 11. One end of the driven rod 622 has a squeezing groove 6211 that cooperates with the driving rod 621, and the other end of the driven rod 622 is located in the squeezing chamber 12 and fits against the airbag 63. Specifically, when the fixed plate 33 drives the push rod 61 to slide synchronously towards the airbag 63, the push rod 61 squeezes the active rod 621 to slide horizontally through the push groove 611. When the active rod 621 slides, it pushes the driven rod 622 to slide along the direction of the airbag 63 through the compression groove 6211, thereby squeezing the airbag 63 and driving the gas to be ejected from the nozzle 7. The bottom of both the active rod 621 and the driven rod 622 are provided with limiting sliders. The inner wall of the detection area 11 is provided with limiting grooves corresponding to the limiting sliders. The active rod 621 and the driven rod 622 achieve sliding connection with the detection area 11 through the mutual cooperation of the limiting sliders and the limiting grooves.

[0033] In this embodiment, the driven rod 622 is provided with a pressure-boosting surface 6222 at its front end; Specifically, the pressure-boosting surface 6222 is used to increase the contact area between the driven rod 622 and the airbag 63, thereby enhancing the compression area of ​​the airbag 63, ensuring the amount of air sprayed by the nozzle 7, and thus ensuring the cleaning effect on the detection window 111.

[0034] In this embodiment, a guide vane 311 is fixedly connected to the rear end of the drive shaft 31, and the guide vane 311 is installed on the opposite side of the nozzle 7. Specifically, when the drive shaft 31 rotates, it drives the guide vane 311 to rotate synchronously. The guide vane 311 then pulls the gas in the detection area 11. When the nozzle 7 sprays gas, the gas blows the dust off the detection window 111. At this time, the guide vane 311 pulls the gas and then pulls the dust towards itself, preventing the dust from adhering to the cuvette 5 and cuvette holder 4 and affecting the detection accuracy. When the mechanism resets, the motor 2 reverses and drives the drive shaft 31 to rotate synchronously. The drive shaft 31 drives the guide vane 311 to rotate and discharge the airflow in the detection area 11, thus ensuring the cleanliness of the detection area 11 when it is opened.

[0035] When using the UV-Vis spectrophotometer for water pollution detection of the present invention, after the UV-Vis spectrophotometer body 1 is preheated, the staff will fill the water sample into cuvettes 5 and fix them in the frame 41 of the cuvette holder 4. Then, the cover plate 42 will be put on to seal the cuvettes 5, and the staff will close the detection area 11. After the UV-Vis spectrophotometer body 1 completes the blank reagent test, the motor 2 rotates forward, thereby driving the drive shaft 31 to rotate synchronously. The drive shaft 31 slides horizontally along the nozzle 7 via the threaded drive shaft 31 sleeve. The bushing 32 drives the fixing plate 33 to slide synchronously, and the fixing plate 33 drives the colorimeter holder 4 to slide synchronously. The colorimeter holder 4 drives the cuvette 5 of the first water quality sample to slide in front of the detection window 111 for detection. During the sliding process of the fixing plate 33, the vibrating block 34 comes into contact with and collides with the vibrating rod 35, thereby generating vibration. The vibration is transmitted to the cuvette 5 through the transmission column 331, causing the water quality sample in the cuvette 5 to oscillate, thereby ensuring the homogeneity of the water quality sample; at the same time, the fixing... Plate 33 drives push rod 61 to slide synchronously. Push rod 61 pushes the first set of active rods 621 to slide horizontally through push groove 611. Active rod 621 pushes the corresponding driven rod 622 to slide vertically through squeezing groove 6211. Driven rod 622 squeezes airbag 63. Gas in airbag 63 is sprayed out through nozzle 7 to clean detection window 111. At the same time, drive shaft 31 drives guide vane 311 to rotate to pull airflow. When motor 2 stops rotating, the cuvette 5 of the first water quality sample is facing the detection window 111 and then detected. After the first water quality sample is detected, motor 2 starts to rotate forward and repeats the above process until all cuvettes 5 of all water quality samples are detected. After the test is completed, the staff opens the test area 11, starts the motor 2 in reverse, and the motor 2 drives the drive shaft 31 to rotate synchronously. The drive shaft 31 drives the drainage blades 311 to rotate synchronously, and the drainage blades 311 discharge the airflow in the test area 11, thus ensuring the cleanliness of the test area 11 when it is opened. At the same time, the drive shaft 31 drives the bushing 32 to slide back to its original position, the bushing 32 drives the fixing plate 33 to its original position, and the fixing plate 33 drives the colorimeter holder 4 to its original position. At the same time, the fixing plate 33 drives the top rod 61 to its original position. The top rod 61 no longer presses the active rod 621. At this time, the airbag 63 draws air through the one-way air intake valve 65 to its original position. The airbag 63 pushes the driven rod 622 to its original position. The driven rod 622 pushes the active rod 621 to its original position through the squeezing groove 6211. The staff opens the cover plate 42 and takes out the colorimeter cuvette 5 for cleaning.

[0036] A UV-Vis spectrophotometer detection method includes the following steps: Step 1: Start and preheat the UV-Vis spectrophotometer body 1; Step 2: Place the blank reagent and water samples from different areas into different cuvettes 5; Step 3: Place the blank reagent and the cuvette 5 containing the water sample into the test rack in sequence; Step 4: The UV-Vis spectrophotometer body 1 detects the blank reagent; Step 5: Motor 2 drives colorimeter holder 4 to slide at equal intervals through sliding assembly 3, and tests water quality samples in sequence; Step 6: During each sliding motion of the sliding component 3, the nozzle 7 is driven by the cleaning component 6 to spray air to clean the detection window 111; Step 7: After the test is completed, remove cuvette 5 and clean it. Specifically, the UV-Vis spectrophotometer body 1 is first preheated for 30 minutes to ensure that the light source, electronic components, and mechanical system reach thermal equilibrium, thereby obtaining stable and accurate measurement results. The operator holds the rough surface of the cuvette 5 and pours the blank reagent and water samples from different areas into different cuvettes 5, numbering them accordingly. The smooth surface of the cuvette 5 is then wiped clean. First, the cuvette 5 containing the blank reagent is placed in the first fixing slot 411 of the colorimetric holder 4. Then, the cuvettes 5 containing the water samples are placed into the fixing slots 411 according to their numbers. The operator closes the detection area 11, and the UV-Vis spectrophotometer body 1 emits a monochromatic light beam through the monochromatic mirror. This monochromatic light beam passes through the detection slot 412 on the colorimetric holder 4 to detect the blank reagent, thereby generating a signal for comparison with... Data graphs comparing water quality samples; After the blank reagent test is completed, the motor drives the cuvette 4 to slide for the first time through the sliding component 3, sliding cuvette 5 numbered 1 to the detection window 111 for testing, generating the first water quality sample data graph. Then, the motor 2 drives the cuvette 4 to slide for the second time through the sliding component 3, testing cuvette 5 numbered 2, and so on, completing the testing of all cuvettes 5. While the sliding component 3 drives the cuvette 4 to slide, the sliding component 3 drives the nozzle 7 through the cleaning component 6 to spray air to clean the detection window 111, thereby ensuring the detection accuracy of the water quality sample. After the water quality sample test is completed, the staff opens the detection area 11 of the UV-Vis spectrophotometer body 1, then starts the motor 2 to reverse and drive the cuvette 4 to reset, and then removes the cuvette 5 from the cuvette 4 for cleaning.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A UV-Vis spectrophotometer for water pollution detection, characterized in that, include: The UV-Vis spectrophotometer body (1), motor (2), sliding assembly (3), colorimeter holder (4), cuvette (5), cleaning assembly (6), and nozzle (7); The ultraviolet-visible spectrophotometer body (1) has a detection area (11) and a detection window (111) on the detection area (11). A squeezing chamber (12) communicating with the detection area (11) is provided on one side of the detection area (11). The squeezing chamber (12) is communicating with the outside. A motor (2) is fixedly installed in the detection area (11). The motor (2) is provided with a sliding component (3), and a colorimeter frame (4) is installed on the sliding component (3). Colorimeter cuvettes (5) are placed in a linear array on the colorimeter frame (4). The motor (2) drives the colorimeter frame (4) to slide at equal intervals through the sliding component (3), thereby driving the colorimeter cuvettes (5) to pass through the detection window (111) in sequence. A cleaning component (6) is provided on one side of the sliding component (3). The cleaning component (6) is located in the extrusion chamber (12). The cleaning component (6) is connected to the nozzle (7). The nozzle (7) is located on one side of the detection window (111). When the sliding component (3) slides at equal distances, the nozzle (7) is driven to spray air through the cleaning component (6).

2. The ultraviolet-visible spectrophotometer according to claim 1, characterized in that: The colorimeter is composed of a frame (41) and a cover plate (42). The frame (41) has a linear array of fixing grooves (411). The fixing grooves (411) have symmetrically opened detection grooves (412) on both sides. The fixing grooves (411) have a grid array of friction protrusions on the other two sides. The fixing grooves (411) are used to fix and place the colorimeter (5). The cover plate (42) is detachably connected to the frame (41). The cover plate (42) is used to seal the colorimeter (5).

3. The ultraviolet-visible spectrophotometer according to claim 2, characterized in that: The sliding assembly (3) includes a drive shaft (31), a bushing (32), a fixing plate (33), a vibration block (34), and a vibration rod (35). The drive shaft (31) is fixedly connected to the motor (2), and the front end of the drive shaft (31) is provided with a thread, and a bushing (32) is slidably installed on the drive shaft (31). The bushing (32) has a threaded groove that engages with the threaded part. The bushing (32) is slidably installed in the detection area (11). A fixing plate (33) is fixedly installed on the bushing (32). The fixing plate (33) is connected to the frame (41), and vibration blocks (34) are symmetrically arranged on both sides of the fixing plate (33). The vibrating blocks (34) are linearly arrayed on the fixed plate (33), and a vibrating rod (35) is provided on one side of the vibrating blocks (34). The vibration rod (35) is fixedly installed in the detection area (11).

4. The ultraviolet-visible spectrophotometer according to claim 3, characterized in that: The fixed plate (33) is provided with a transmission column (331), and the frame (41) is provided with a transmission groove (413) that cooperates with the transmission column (331). The transmission groove (413) is located at the gap of the fixed groove (411) and is at the same height as the detection groove (412).

5. The ultraviolet-visible spectrophotometer according to claim 4, characterized in that: The vibrating block (34) is a hemispherical structure (341); the vibrating block (34) is located on both sides of the conduction column (331) and corresponds to the conduction column (331).

6. The ultraviolet-visible spectrophotometer according to claim 4, characterized in that: The cleaning assembly (6) includes a top rod (61), a linkage mechanism (62), an airbag (63), a one-way air outlet valve (64), a one-way air inlet valve (65), and a filter screen (66). The top rod (61) is fixedly connected to the fixed plate (33). Multiple sets of linkage mechanisms (62) are symmetrically arranged on both sides of the top rod (61). Push grooves (611) for driving the linkage mechanism (62) are symmetrically opened on the top rod (61). The linkage mechanism (62) is attached to the airbag (63); The airbag (63) is fixedly installed in the extrusion chamber (12). The airbag (63) is equipped with a one-way air outlet valve (64) and a one-way air inlet valve (65). The airbag (63) is connected to the nozzle (7) through the one-way air outlet valve (64). The airbag (63) is connected to the outside world through a one-way air intake valve (65). The one-way air intake valve (65) is fixedly connected to the compression chamber (12). A filter screen (66) is provided on one side of the one-way air intake valve (65). The filter screen (66) is fixedly connected to the compression chamber (12).

7. The ultraviolet-visible spectrophotometer according to claim 6, characterized in that: The linkage mechanism (62) includes a driving link (621) and a driven link (622). The active rod (621) is symmetrically arranged on both sides of the top rod (61) and is slidably connected to the detection area (11); one end of the active rod (621) is provided with a push groove (611) that cooperates with the top rod (61), and the other side of the active rod (621) is provided with a squeezing groove (6211) and a driven rod (622) is vertically arranged. The driven rod (622) is slidably installed with the detection area (11). One end of the driven rod (622) is provided with a squeezing groove (6211) that cooperates with the driving rod (621), and the other end of the driven rod (622) is located in the squeezing chamber (12) and fits against the airbag (63).

8. The ultraviolet-visible spectrophotometer according to claim 7, characterized in that: The driven rod (622) has a pressure-boosting surface (6222) at its front end.

9. The ultraviolet-visible spectrophotometer according to claim 6, characterized in that: A guide vane (311) is fixedly connected to the rear end of the drive shaft (31), and the guide vane (311) is installed on the opposite side of the nozzle (7).

10. A UV-Vis spectrophotometer detection method, used in the UV-Vis spectrophotometer according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Start the UV-Vis spectrophotometer body (1) and preheat it; Step 2: Place the blank reagent and water samples from different areas into different cuvettes (5); Step 3: Place the blank reagent and the cuvette (5) of the water quality sample into the test rack in sequence; Step 4: The UV-Vis spectrophotometer body (1) detects the blank reagent; Step 5: The motor (2) drives the colorimeter holder (4) to slide at equal intervals through the sliding assembly (3) to test the water quality samples in sequence; Step 6: During each sliding process, the sliding component (3) drives the nozzle (7) to spray air onto the detection window (111) through the cleaning component (6) to clean it. Step 7: After the test is completed, take out the cuvette (5) and clean it.

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