A digestion and detection device for online analysis of water quality

Abstract

The utility model discloses a kind of digestion and detection device for water quality online analysis, including digestion pool, left mounting plate, right mounting plate, upper support block, lower support block, O ring, LED lamp PCB board and light absorption PCB board.Digestion pool is used to accommodate water sample and reagent to carry out reaction, upper and lower support block is respectively arranged in the upper and lower both ends of digestion pool, O ring is arranged between digestion pool and support block and forms sealing structure, left and right mounting plate is respectively located in the both sides of digestion pool, LED lamp PCB board is installed on left mounting plate, light absorption PCB board is installed on right mounting plate, both are relatively arranged along horizontal direction, light path passes through digestion pool.The utility model further includes heating wire wound on the outer surface of digestion pool and PT100 temperature sensor embedded in digestion pool.The device integrates digestion reaction and optical detection together, realizes the automation online monitoring of water quality analysis, with compact structure, good sealing, the advantages of accurate measurement.

Description

Technical Field

[0001] This utility model relates to the field of water quality analysis technology, and in particular to a digestion and detection device for online water quality analysis, which is suitable for automatically monitoring the concentration of specific pollutants in water. Background Technology

[0002] Water quality monitoring is a crucial aspect of environmental protection and water resource management, and online analysis technology enables real-time water quality monitoring, providing timely data support for water quality management. Currently, many water quality analysis methods require digestion before analysis using methods such as colorimetry.

[0003] Traditional water quality analysis typically employs manual sampling and analysis methods in laboratories, which is time-consuming, labor-intensive, and prone to delays, failing to meet the needs of real-time monitoring. With the development of automated analysis technology, integrated automated water quality analysis equipment has been put into use. These devices typically include functional modules for sample collection, digestion, and result detection.

[0004] In existing online water quality analysis equipment, digestion and detection are usually designed as two separate functional units. After water sample digestion, it needs to be transferred to the detection unit for analysis, which increases the complexity of the system and the probability of errors. At the same time, the sealing performance of the digestion device, the accuracy of temperature control, and the stability of the optical detection system also directly affect the accuracy of the measurement results.

[0005] In addition, existing digestion devices often suffer from problems such as poor sealing leading to reactant leakage, inaccurate temperature control affecting reaction results, and unreasonable optical path design leading to unstable detection signals. These issues limit the measurement accuracy and reliability of online water quality analysis systems. Utility Model Content

[0006] In view of this, this application provides a digestion and detection device for online water quality analysis, which solves the problems in the prior art where the separation of digestion and detection leads to system complexity, poor sealing affecting reaction effect, and optical path instability affecting measurement accuracy.

[0007] This application provides a digestion and detection device for online water quality analysis, including: A digestion tank for containing water samples and reagents for reaction; a left mounting plate and a right mounting plate, respectively located on opposite sides of the digestion tank; an upper support block disposed at the upper end of the digestion tank; a lower support block disposed at the lower end of the digestion tank; at least two O-rings disposed between the digestion tank and the upper support block and between the digestion tank and the lower support block, respectively, to form a sealing structure; an LED lamp PCB board mounted on the left mounting plate; and a light-absorbing PCB board mounted on the right mounting plate, wherein the LED lamp PCB board and the light-absorbing PCB board are arranged opposite each other in a horizontal direction, and the light path passes through the digestion tank.

[0008] The digestion tank is equipped with a heating wire and a PT100 temperature sensor. The heating wire is wound around the outer surface of the digestion tank, and the PT100 temperature sensor is embedded in the digestion tank to monitor the temperature inside the digestion tank.

[0009] It also includes: an upper pressure plate configured to press the upper support block; two lower pressure plates configured to press the lower support block; and a plurality of screws for fixing the upper pressure plate and the lower pressure plate to the left mounting plate and the right mounting plate, respectively.

[0010] The O-rings include two fluororubber O-rings, one of which is disposed between the upper end of the digestion tank and the upper support block, and the other of which is disposed between the lower end of the digestion tank and the lower support block. The specifications of the fluororubber O-rings are D7*d1.5.

[0011] The left mounting plate is provided with a first mounting structure for mounting the LED lamp PCB board, and the right mounting plate is provided with a second mounting structure for mounting the light-absorbing PCB board. The first mounting structure and the second mounting structure are configured to ensure that the LED lamp PCB board and the light-absorbing PCB board are aligned with the digestion pool to form a light path.

[0012] The heating wire is connected to the control system via a circuit, and the PT100 temperature sensor is connected to the control system via a circuit. The control system is configured to control the heating power of the heating wire based on the temperature value detected by the PT100 temperature sensor, so as to maintain the temperature in the digestion tank within a preset range.

[0013] The left mounting plate and the right mounting plate are fixedly connected by multiple M3 hexagon socket head cap screws to form a frame structure. The frame structure is used to support and fix the digestion tank, the upper support block, the lower support block, the LED lamp PCB board, and the light-absorbing PCB board. It also includes: multiple M3*5 copper studs for mounting the LED lamp PCB board and the light-absorbing PCB board; a pad block, located below the lower support block, for auxiliary positioning of the light-absorbing PCB board; and a mounting shaft for auxiliary positioning of the LED lamp.

[0014] The LED lamp PCB board is configured to emit a light source with a fixed light intensity, the light-absorbing PCB board is configured to receive light passing through the digestion cell, and the device is configured to calculate the concentration of the analyte in the digestion cell by detecting the difference between the light intensity emitted by the LED lamp PCB board and the light intensity received by the light-absorbing PCB board.

[0015] This application has the following technical effects: This invention integrates digestion and detection functions into a compact device, eliminating the sample transfer process and improving analytical efficiency and accuracy. O-ring seals at both ends of the digestion cell ensure a tight seal during the reaction process, preventing reactant leakage and external contamination. The combination of a heating wire and a PT100 temperature sensor enables precise control of the digestion temperature, ensuring the reaction proceeds under optimal conditions and improving the reliability of the detection results. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this disclosure and, together with the specification, serve to explain the technical solutions of this disclosure. It should be understood that the following drawings only show some embodiments of this disclosure and should not be considered as limiting the scope. Those skilled in the art can obtain other related drawings based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of a digestion and detection device for online water quality analysis provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the exploded structure of the digestion and detection device provided in an embodiment of the present invention. Explanation of the numbers in the diagram: 1-Upper support block; 2-D7d1.5 fluororubber O-ring; 3-Upper pressure plate; 4-Right mounting plate; 5-Lower support block; 6-Lower pressure plate; 7-Left mounting plate; 8-Mounting shaft; 9-Padded block; 10-LED lamp PCB board; 11-M35 copper stud; 12-Light-absorbing PCB board; 13-M3 socket head cap screw; 14-Digestion tank; 15-Heating wire; 16-PT100 temperature sensor; 17-M3 Phillips head screw. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In this document, the term "and / or" merely describes a relationship, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0021] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] This application provides a digestion and detection device for online water quality analysis, including: A digestion tank for containing a water sample and reagents for reaction; a left mounting plate and a right mounting plate located on opposite sides of the digestion tank; an upper support block positioned at the upper end of the digestion tank; a lower support block positioned at the lower end of the digestion tank; at least two O-rings positioned between the digestion tank and the upper support block and between the digestion tank and the lower support block, respectively, to form a sealing structure; an LED lamp PCB board mounted on the left mounting plate; and a light-absorbing PCB board mounted on the right mounting plate, with the LED lamp PCB board and the light-absorbing PCB board arranged horizontally opposite each other, and the light path passing through the digestion tank.

[0024] The digestion tank is equipped with a heating wire and a PT100 temperature sensor. The heating wire is wound around the outer surface of the digestion tank, and the PT100 temperature sensor is embedded in the digestion tank to monitor the temperature inside the digestion tank.

[0025] It also includes: an upper pressure plate configured to press the upper support block; two lower pressure plates configured to press the lower support block; and a plurality of screws for fixing the upper pressure plate and the lower pressure plate to the left mounting plate and the right mounting plate, respectively.

[0026] The O-rings include two fluororubber O-rings, one of which is disposed between the upper end of the digestion tank and the upper support block, and the other of which is disposed between the lower end of the digestion tank and the lower support block. The specifications of the fluororubber O-rings are D7*d1.5.

[0027] The left mounting plate is provided with a first mounting structure for mounting the LED lamp PCB board, and the right mounting plate is provided with a second mounting structure for mounting the light-absorbing PCB board. The first mounting structure and the second mounting structure are configured to ensure that the LED lamp PCB board and the light-absorbing PCB board are aligned with the digestion pool to form a light path.

[0028] The heating wire is connected to the control system via a circuit, and the PT100 temperature sensor is connected to the control system via a circuit. The control system is configured to control the heating power of the heating wire based on the temperature value detected by the PT100 temperature sensor, so as to maintain the temperature in the digestion tank within a preset range.

[0029] The left mounting plate and the right mounting plate are fixedly connected by multiple M3 hexagon socket head cap screws to form a frame structure. The frame structure is used to support and fix the digestion tank, the upper support block, the lower support block, the LED lamp PCB board, and the light-absorbing PCB board. It also includes: multiple M3*5 copper studs for mounting the LED lamp PCB board and the light-absorbing PCB board; a pad block, located below the lower support block, for auxiliary positioning of the light-absorbing PCB board; and a mounting shaft for auxiliary positioning of the LED lamp.

[0030] The LED lamp PCB board is configured to emit a light source with a fixed light intensity, the light-absorbing PCB board is configured to receive light passing through the digestion cell, and the device is configured to calculate the concentration of the analyte in the digestion cell by detecting the difference between the light intensity emitted by the LED lamp PCB board and the light intensity received by the light-absorbing PCB board.

[0031] This application has the following technical effects: This invention integrates digestion and detection functions into a compact device, eliminating the sample transfer process and improving analytical efficiency and accuracy. O-ring seals at both ends of the digestion cell ensure a tight seal during the reaction process, preventing reactant leakage and external contamination. The combination of a heating wire and a PT100 temperature sensor enables precise control of the digestion temperature, ensuring the reaction proceeds under optimal conditions and improving the reliability of the detection results.

[0032] Specifically, this utility model provides a digestion and detection device for online water quality analysis. This device integrates digestion and optical detection functions, and simplifies the water quality analysis process through integrated design, thereby improving analysis efficiency and accuracy.

[0033] Reference Figure 1 and Figure 2 The digestion and testing device of this utility model mainly includes a digestion tank 14, a left mounting plate 7, a right mounting plate 4, an upper support block 1, a lower support block 5, an upper pressure plate 3, a lower pressure plate 6, an O-ring 2, an LED lamp PCB board 10, a light-absorbing PCB board 12, and other components, as well as connecting elements such as screws and studs for fixing and connecting these components.

[0034] First, the digestion tank 14 is the core component of this device, used to contain and react the water sample and reagents. The digestion tank 14 is made of a transparent material, which can withstand temperature changes during heating while allowing light to pass through for optical detection. Heating wires 15 are wound around the outer surface of the digestion tank 14 to heat the liquid inside. A PT100 temperature sensor 16 is also embedded within the digestion tank 14 for real-time temperature monitoring.

[0035] The upper and lower ends of the digestion tank 14 are in contact with the upper support block 1 and the lower support block 5, respectively. To ensure a tight seal, D7*d1.5 fluororubber O-rings 2 are installed between the digestion tank 14 and the upper support block 1, and between the digestion tank 14 and the lower support block 5. This sealing structure effectively prevents liquid leakage and the entry of external contaminants during the digestion process, ensuring the purity of the reaction environment.

[0036] To further enhance the sealing and fixing effects, the upper pressure plate 3 is configured to press against the upper support block 1, and the two lower pressure plates 6 are configured to press against the lower support block 5. The upper pressure plate 3 and the lower pressure plate 6 are respectively fixedly connected to the left mounting plate 7 and the right mounting plate 4 by M3 Phillips head screws 17, forming a stable pressing structure.

[0037] The left mounting plate 7 and the right mounting plate 4 constitute the main frame of this device, and the two are fixedly connected by multiple M3 hexagon socket head cap screws 13. The left mounting plate 7 and the right mounting plate 4 are located on both sides of the digestion tank 14, respectively, and not only serve to support and fix other components, but also serve as the mounting base for the LED lamp PCB board 10 and the light-absorbing PCB board 12, respectively.

[0038] The LED PCB board 10 is mounted on the left mounting plate 7, and the light-absorbing PCB board 12 is mounted on the right mounting plate 4. They are positioned horizontally opposite each other, forming a light path passing through the digestion tank 14. The LED PCB board 10 and the light-absorbing PCB board 12 are respectively fixed to their respective mounting plates using M3*5 copper studs 11. The left mounting plate 7 has a first mounting structure for mounting the LED PCB board 10, and the right mounting plate 4 has a second mounting structure for mounting the light-absorbing PCB board 12. These mounting structures ensure that the LED PCB board 10 and the light-absorbing PCB board 12 can be precisely aligned with the digestion tank 14, guaranteeing the stability of the light path and the accuracy of the measurement.

[0039] In addition, the device also includes a pad 9, which is disposed below the lower support block 5 for adjusting the position of the lower support block 5; and a mounting shaft 8 for assisting in the positioning of the LED light.

[0040] During operation, the working principle of this device is as follows: After the instrument starts measuring, the system automatically introduces the reagents and water sample into the digestion tank 14. The heating wire 15, once energized, begins to heat the digestion tank 14, causing the reagents and water sample to undergo a chemical reaction at a specific temperature. The PT100 temperature sensor 16 monitors the temperature inside the digestion tank in real time and transmits the temperature data to the control system. The control system adjusts the heating power of the heating wire 15 based on the temperature data to maintain the temperature inside the digestion tank within a preset range.

[0041] While the reaction is underway, the LED PCB board 10 emits a light source with a fixed intensity. The light passes through the digestion tank 14 and the reactants within it, and is then received by the light-absorbing PCB board 12. The system calculates the concentration of the analyte by detecting the light intensity difference between the emitting and receiving ends. Since the degree to which a reactant absorbs light of a specific wavelength is proportional to its concentration, this method can accurately determine the content of specific substances in a water sample.

[0042] Compared with the prior art, the present invention has the following advantages: High integration: Digestion and detection functions are integrated into a compact device, eliminating the sample transfer process, simplifying the system structure, and improving analysis efficiency.

[0043] Good sealing performance: The combination design of upper and lower support blocks, O-rings and pressure plates ensures good sealing performance of the digestion process, preventing reactant leakage and external contamination.

[0044] Precise temperature control: The combination of heating wire and PT100 temperature sensor enables real-time monitoring and precise control of digestion temperature, ensuring that the reaction proceeds under optimal conditions.

[0045] Stable optical path: The LED lamp PCB board and the light-absorbing PCB board are fixed on the left and right mounting plates respectively, forming a stable optical path system, which reduces the impact of mechanical vibration and external factors on the measurement results.

[0046] Robust structure: Multiple fixing connections ensure the structural stability and durability of the entire device, making it suitable for long-term online monitoring.

[0047] In summary, the digestion and detection device provided by this utility model, through innovative structural design and functional integration, effectively solves the problems of poor sealing, inaccurate temperature control, and unstable optical path in traditional water quality analysis equipment, improves the efficiency and accuracy of online water quality analysis, and has important practical value.

[0048] In specific embodiments of this utility model, the materials and structures of various components of the device can be selected and optimized. For example, the digestion tank 14 can be made of materials that are resistant to high temperatures and corrosion and have good optical transparency, such as quartz glass of specific specifications or special polymer materials; the O-ring 2 can be made of sealing materials of different materials according to the actual use environment, such as special rubber materials that are more corrosion resistant in strong acid and strong alkali environments; the LED lamp PCB board 10 can be designed to emit light sources of specific wavelengths to meet the detection requirements of different water quality indicators.

[0049] In addition, this device can be further integrated with an automatic sampling system, a waste liquid discharge system, and a data processing system to form a complete online water quality monitoring station, enabling fully automatic and continuous monitoring of water bodies.

[0050] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A digestion and detection device for online water quality analysis, characterized in that, include: A digestion tank; A left mounting plate and a right mounting plate are respectively located on both sides of the digestion tank; An upper support block is disposed at the upper end of the digestion tank; An upper pressure plate is disposed on the upper support block; A lower support block is disposed at the lower end of the digestion tank; Two lower pressure plates are disposed below the lower support block; At least two O-rings are provided, the two O-rings being respectively disposed between the digestion tank and the upper support block and between the digestion tank and the lower support block; An LED lamp PCB board is mounted on the left mounting plate; as well as A light-absorbing PCB board is mounted on the right mounting plate.

2. The digestion and detection apparatus according to claim 1, characterized in that, The digestion tank is equipped with a heating wire and a PT100 temperature sensor. The heating wire is wound around the outer surface of the digestion tank, and the PT100 temperature sensor is located inside the digestion tank.

3. The digestion and detection apparatus according to claim 1, characterized in that, The upper pressure plate is fixedly connected to the left mounting plate and the right mounting plate by screws, and the lower pressure plate is fixedly connected to the left mounting plate and the right mounting plate by screws. The upper pressure plate is configured to press the upper support block, and the lower pressure plate is configured to press the lower support block.

4. The digestion and detection apparatus according to claim 1, characterized in that, The O-rings include two D7*d1.5 fluororubber O-rings, one of which is disposed between the upper end of the digestion tank and the upper support block, and the other of which is disposed between the lower end of the digestion tank and the lower support block.

5. The digestion and detection apparatus according to claim 1, characterized in that, The LED lamp PCB board is mounted on the left mounting plate using M35 copper studs, and the light-absorbing PCB board is mounted on the right mounting plate using M35 copper studs. The LED lamp PCB board and the light-absorbing PCB board are arranged opposite each other in the horizontal direction, and the light path passes through the digestion tank.

6. The digestion and detection apparatus according to claim 1, characterized in that, The left mounting plate and the right mounting plate are fixedly connected by M3 hex socket head cap screws, and the upper pressure plate is fixedly connected to the left mounting plate and the right mounting plate by M3 Phillips head screws.

7. The digestion and detection apparatus according to claim 1, characterized in that, Also includes: A pad is placed below the lower support block to assist in positioning the light-absorbing PCB board; And a mounting shaft for assisting in the positioning of the LED.

8. The digestion and detection apparatus according to claim 1, characterized in that, The LED PCB board is used to emit light, and the light-absorbing PCB board is used to receive light passing through the digestion cell. The concentration of the analyte in the digestion cell is calculated by detecting the light intensity difference between the emitting end and the receiving end.

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