A digestion module for water quality testing

Abstract

This utility model discloses a digestion module for water quality testing, including a digestion tube support and a liquid collection head. The digestion tube support houses a digestion tube, a heating module, and a temperature sensor. An upper support adapter plate is connected to the top of the digestion tube support, and a lower support adapter plate is connected to the bottom. A central hole is vertically provided in the middle of the digestion tube support, through which the digestion tube passes. The upper and lower ends of the digestion tube are clamped and fixed by the upper and lower support adapter plates. The upper support adapter plate has an air path connector, a first high-pressure valve, and an air passage. The air path connector is connected to an air intake pump and an air blowing pump. One end of the air passage is connected to the air path connector, and the other end is connected to the digestion tube and the first high-pressure valve. The lower support adapter plate has a flow path connector, a second high-pressure valve, and a flow passage. The liquid collection head has a liquid collection hole, and its bottom is connected to the flow path connector. This utility model's technical solution improves the accuracy of the test results, as well as efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing technology, and in particular to a digestion module for water quality testing. Background Technology

[0002] In the field of water quality monitoring, real-time and accurate understanding of water quality is of great significance for water environment management, ecological protection, and public health safeguards. Currently, miniature water quality monitoring stations are widely used in various water body on-site monitoring scenarios as a mainstream application product. These monitoring stations monitor nine major water quality parameters—COD, ammonia nitrogen, phosphate, nitrate, turbidity, dissolved oxygen, conductivity, temperature, and pH—based on national standard methods. They feature rapid on-site setup and installation, are compatible with solar power systems, and can be stably applied in complex outdoor environments.

[0003] However, existing miniature water quality monitoring stations still have significant limitations in their testing processes: the digestion and treatment of water samples mainly relies on manual operation. In actual monitoring, operators need to pre-treat the collected water samples before conducting tests. This manual operation not only increases labor costs but is also prone to introducing errors due to differences in operating techniques and reaction time control. This results in poor consistency of test results between different batches or different operators, seriously affecting the reliability of the test data and making it difficult to meet the needs of high-precision water quality monitoring. Therefore, to address the shortcomings of the digestion and treatment process in existing miniature water quality monitoring stations, it is urgent to optimize their structural design to improve automation and testing stability. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model discloses a digestion module for water quality testing, which improves the accuracy, reliability, and consistency of the test results.

[0005] The technical solution of this utility model is as follows:

[0006] A digestion module for water quality testing includes a hollow digestion tube support and a liquid receiving head. The digestion tube support houses a digestion tube, a heating module, and a temperature sensor. An upper support adapter plate is connected to the top of the digestion tube support, and a lower support adapter plate is connected to the bottom. A central hole is vertically provided in the middle of the digestion tube support, through which the digestion tube passes. The upper and lower ends of the digestion tube are clamped and fixed by the upper and lower support adapter plates. Heat dissipation holes are provided on the front sidewall of the digestion tube support.

[0007] The upper support adapter plate is equipped with an air circuit connector, a first high-pressure valve and an air passage. The air circuit connector is connected to the suction pump and the blowing pump. One end of the air passage is connected to the air circuit connector and the other end of the air passage is connected to the digestion tube and the first high-pressure valve.

[0008] The lower support adapter plate is equipped with a flow path connector, a second high-pressure valve and a flow channel. One end of the flow channel is connected to the digestion tube and the second high-pressure valve. The flow channel is also connected to the three-way solenoid valve and the flow path connector.

[0009] The liquid receiving head is provided with a liquid receiving hole, and the bottom of the liquid receiving head is connected to the flow path connector.

[0010] The flow path connector is connected to the sample inlet pipe of the testing module.

[0011] When this technical solution is used, after the sample solution is added to the receiving head, the digestion module processes the sample solution. First, the suction pump starts to draw in air, and the high-pressure valve and three-way solenoid valve in the single flow path open to create negative pressure, while other flow paths are blocked. The liquid flows through the flow path connector, the solenoid three-way valve, the second high-pressure valve, and the flow channel of the lower support adapter plate into the digestion tube. Once all the liquid is drawn into the digestion tube, the suction pump continues to draw in air, causing the liquid in the digestion tube to continuously bubble, thus achieving uniform mixing. Next, the suction pump, high-pressure valve, and solenoid three-way valve stop working, and the heating wire starts to heat the liquid in the digestion tube, initiating the digestion reaction. After the set time is reached, the heating wire stops working, and the digestion tube waits for cooling. When the temperature of the liquid in the digestion tube drops to normal, the testing stage begins. The blowing pump starts to blow air, and the high-pressure valve and three-way solenoid valve in the single flow path open to create positive pressure, while other flow paths are blocked. The liquid flows through the flow channel of the lower support adapter plate into the testing module for testing. The entire process is convenient to operate and reduces the influence of human factors.

[0012] As a further improvement of this utility model, the bottom of the upper bracket adapter plate is provided with a first sealing ring that connects to the digestion tube, and the top of the lower bracket adapter plate is provided with a second sealing ring that connects to the digestion tube.

[0013] As a further improvement of this utility model, the bottom of the upper bracket adapter plate is provided with a first sealing ring groove, and the top of the lower bracket adapter plate is provided with a second sealing ring groove.

[0014] As a further improvement of this utility model, the lower part of the liquid collection hole has an inverted conical structure.

[0015] As a further improvement of this utility model, a fan is provided on the rear side wall of the digestion tube support, and the position of the fan is opposite to the position of the heat dissipation hole.

[0016] As a further improvement of this utility model, the flow channel includes a first flow channel, a second flow channel and a third flow channel connected in sequence. The first flow channel is connected to the digestion tube and the second high-pressure valve, the second flow channel is connected to the three-way solenoid valve and the second high-pressure valve, and the third flow channel is connected to the three-way solenoid valve and the flow path connector. The first flow channel is vertically arranged, the second flow channel is inclined, and the third flow channel is horizontally arranged.

[0017] As a further improvement of this utility model, the lower support adapter plate is connected to the flow path cover plate, which is located on one side of the second flow channel; the flow path cover plate is fixed to the lower support adapter plate by screws. The lower support adapter plate is provided with a sealing ring that connects to the flow path cover plate.

[0018] As a further improvement of this utility model, the top of the digestion tube support is provided with a first fixing hole, and the upper support adapter plate is fixedly connected to the digestion tube support through a first fixing member and a first positioning hole.

[0019] The bottom of the digestion tube support is provided with a second fixing hole, and the lower support adapter plate is fixedly connected to the digestion tube support through a second fixing member and a second positioning hole.

[0020] The upper bracket adapter plate is provided with an air connection mounting hole for installing an air connection connector and a first high-pressure valve mounting hole for installing a first high-pressure valve.

[0021] The lower support adapter plate is provided with a flow path connector mounting hole, a second high pressure valve mounting hole for installing a second high pressure valve, and a solenoid valve mounting hole for installing a three-way solenoid valve.

[0022] As a further improvement of this utility model, the digestion module for water quality testing includes a mounting frame, which is provided with a plurality of liquid collection head fixing holes and a plurality of digestion tube support fixing components. The digestion tube support is fixed to the mounting frame by the digestion tube support fixing components, and the liquid collection head is fixed to the mounting frame by the liquid collection head fixing holes.

[0023] As a further improvement of this utility model, the mounting bracket is also provided with heat dissipation holes, which are located on one side of the fan. The fan can dissipate heat to the decomposition tube through these holes.

[0024] As a further improvement of this utility model, the digestion tube support fixing component includes a fixing hole and a groove. The groove is located below the fixing hole. The digestion tube support is fixed on the mounting bracket by a fixing screw that cooperates with the fixing hole. The fixing screw has a boss. After the fixing screw passes through the fixing hole, it is pushed downward to make the boss cooperate with the groove for fixing.

[0025] As a further improvement of this utility model, the liquid receiving head is provided with an external thread, and the liquid receiving head is fixed on the liquid receiving head fixing hole by the external thread.

[0026] As a further improvement of this utility model, the upper support adapter plate and the lower support adapter plate are made of PEEK, nylon or PTFE, the digestion tube support is made of aluminum alloy, and the liquid receiving head is made of PFA or PTFE.

[0027] As a further improvement of this utility model, the material of the flow path cover is PEEK, nylon or PTFE.

[0028] As a further improvement of this utility model, the mounting bracket is made of corrosion-resistant metal materials such as 316L stainless steel or titanium alloy. Furthermore, the bottom of the mounting bracket is provided with several fixing holes for fixing it to the digestion platform with screws.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] The technical solution of this utility model can automatically control the addition of samples and chemicals for digestion. The standardized digestion process improves the accuracy, efficiency and safety of the test results, and results with better reliability and consistency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the digestion module according to an embodiment of the present invention; wherein, (a) is a front view and (b) is a cross-sectional view of the digestion module.

[0032] Figure 2 This is a schematic diagram of the digestion tube support according to an embodiment of the present invention; wherein, (a) is a schematic diagram of the external structure and (b) is a schematic diagram of the internal structure.

[0033] Figure 3 This is a schematic diagram of the upper bracket adapter plate according to an embodiment of the present utility model; wherein (a) to (d) are the left view, front view, right view and bottom view, respectively.

[0034] Figure 4 This is a schematic diagram of the structure of the lower support adapter plate according to an embodiment of the present utility model; wherein (a) to (d) are the top view, left view, front view and right view, respectively.

[0035] Figure 5 This is a schematic diagram of the liquid receiving head according to an embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of the flow path cover plate according to an embodiment of the present utility model.

[0037] Figure 7 This is a schematic diagram of the fixing screw according to an embodiment of the present invention.

[0038] Figure 8 This is a schematic diagram of the mounting bracket according to an embodiment of the present invention.

[0039] The reference numerals in the figures include:

[0040] 1-Digestion tube support, 2-Liquid receiving head, 3-Digestion tube, 4-Heating wire, 5-Temperature sensor, 6-Upper support adapter plate, 7-Lower support adapter plate, 8-Flow path cover plate, 9-Mounting bracket, 10-Fixing screw;

[0041] 11-Center hole, 12-Heat dissipation hole, 13-Fan; 14-First mounting hole, 15-Second mounting hole;

[0042] 21-Liquid collection hole;

[0043] 61-Gas connector; 62-First high-pressure valve; 63-Gas passage; 64-First sealing ring; 65-Gas connector mounting hole; 66-First high-pressure valve mounting hole; 67-First sealing ring groove;

[0044] 71-Flow path connector, 72-Second high pressure valve, 73-Three-way solenoid valve, 74-Second sealing ring, 75-First flow channel, 76-Second flow channel, 77-Third flow channel, 78-Second sealing ring groove, 79-Flow path connector mounting hole, 80-Second high pressure valve mounting hole, 81-Solenoid valve mounting hole;

[0045] 91-Liquid receiving head fixing hole, 92-Heat dissipation hole, 93-Fixing hole, 94-Groove;

[0046] 101 - convex surface. Detailed Implementation

[0047] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] like Figures 1 to 8 As shown, a digestion module for water quality testing includes a hollow digestion tube support 1 and a liquid collection head 2. The digestion tube support 1 houses a digestion tube 3, a heating wire 4, and a temperature sensor 5. The top of the digestion tube support 1 is connected to an upper support adapter plate 6, and the bottom is connected to a lower support adapter plate 7. A central hole 11 is vertically provided in the middle of the digestion tube support 1, through which the digestion tube 3 passes. The upper and lower ends of the digestion tube 3 are clamped and fixed by the upper support adapter plate 6 and the lower support adapter plate 7. A heat dissipation hole 12 is provided on the front side wall of the digestion tube support 1. A fan 13 is provided on the rear side wall of the digestion tube support 1, and the position of the fan 13 is opposite to the position of the heat dissipation hole 12.

[0049] The upper support adapter plate 6 is equipped with a gas path connector 61, a first high-pressure valve 62, and a gas channel 63. The gas path connector 61 is connected to an air intake pump and an air blowing pump. One end of the gas channel 63 is connected to the gas path connector 61, and the other end of the gas channel 63 is connected to the digestion tube 3 and the first high-pressure valve 62. The lower support adapter plate 7 is equipped with a flow path connector 71, a second high-pressure valve 72, and a flow channel. One end of the flow channel is connected to the digestion tube 3 and the second high-pressure valve 72, and the flow channel is also connected to the three-way solenoid valve 73 and the flow path connector 71. The liquid receiving head 2 is equipped with a liquid receiving hole 21, and the bottom of the liquid receiving head 2 is connected to the flow path connector 71. The flow path connector 71 is connected to the sample injection line of the testing module. Specifically, the flow channel includes a first flow channel 75, a second flow channel 76, and a third flow channel 77 connected in sequence. The first flow channel 75 is connected to the digestion tube 3 and the second high-pressure valve 72. The second flow channel 76 is connected to the three-way solenoid valve 73 and the second high-pressure valve 72. The third flow channel 77 is connected to the three-way solenoid valve 73 and the flow path connector 71. The first flow channel 75 is vertically arranged, the second flow channel 76 is inclined, and the third flow channel 77 is horizontally arranged. The lower support adapter plate 7 is connected to the flow path cover plate 8, which is located on one side of the second flow channel 76. The flow path cover plate 8 is fixed to the lower support adapter plate 7 with screws.

[0050] The bottom of the upper support adapter plate 6 is provided with a first sealing ring groove 67, and the top of the lower support adapter plate 7 is provided with a second sealing ring groove 78. The first sealing ring groove 67 is provided with a first sealing ring 64 connected to the digestion tube 3, and the second sealing ring groove 78 is provided with a second sealing ring 74 connected to the digestion tube 3. The lower support adapter plate 7 is provided with a sealing ring connected to the flow path cover plate 8.

[0051] The lower part of the liquid collection hole 21 has an inverted conical structure.

[0052] The digestion tube support 1 has a first fixing hole 14 at its top, and the upper support adapter plate 6 is fixedly connected to the digestion tube support 1 through a first fixing member and a first positioning hole 14; the digestion tube support 1 has a second fixing hole 15 at its bottom, and the lower support adapter plate 7 is fixedly connected to the digestion tube support 1 through a second fixing member and a second positioning hole 15; the upper support adapter plate 6 has a gas path connector mounting hole 65 for installing a gas path connector 61 and a first high-pressure valve mounting hole 66 for installing a first high-pressure valve 62; the lower support adapter plate 7 has a flow path connector mounting hole 79, a second high-pressure valve mounting hole 80 for installing a second high-pressure valve 72, and a solenoid valve mounting hole 81 for installing a three-way solenoid valve 73.

[0053] The digestion module for water quality testing includes a mounting frame 9. The mounting frame 9 has several liquid collection head fixing holes 91 and several digestion tube support brackets 1. The digestion tube supports 1 are fixed to the mounting frame 9 by the digestion tube support brackets 1. The liquid collection head 2 is fixed to the mounting frame 9 through the liquid collection head fixing holes 91. The mounting frame 9 also has heat dissipation holes 92 located on one side of the fan 13. The fan 13 can dissipate heat from the digestion tube 3 through these holes. The liquid collection head 2 has external threads and is fixed to the liquid collection head fixing holes 91 by the external threads.

[0054] Furthermore, the digestion tube support 1 fixing component includes a fixing hole 93 and a groove 94. The groove 94 is located below the fixing hole 93. The digestion tube support 1 is fixed to the mounting bracket 9 by a fixing screw 10 cooperating with the fixing hole 93. The fixing screw 10 is provided with a boss 101. After the fixing screw 10 passes through the fixing hole 93, it is pushed downward to make the boss 101 cooperate with the groove 94 for fixing.

[0055] Furthermore, the upper support adapter plate 6 and the lower support adapter plate 7 are made of PEEK, nylon or PTFE, the digestion tube support 1 is made of aluminum alloy, and the liquid receiving head 2 is made of PFA or PTFE.

[0056] Furthermore, the material of the flow path cover plate 8 is PEEK, nylon, or PTFE.

[0057] Furthermore, the mounting bracket 9 is made of corrosion-resistant metals such as 316L stainless steel or titanium alloy. Furthermore, the bottom of the mounting bracket 9 has several fixing holes for fixing it to the digestion platform with screws.

[0058] When this technical solution is used, after the sample solution is added to the receiving head 2, the digestion module processes the sample solution. First, the air pump starts to draw in air, and the two high-pressure valves (first high-pressure valve 62 and second high-pressure valve 72) and the three-way solenoid valve 73 in a single flow path open to create negative pressure. Other flow paths are blocked. The liquid flows through the flow path connector 71, the third flow channel 77 of the lower support adapter plate 7, the solenoid three-way valve 73, the second flow channel 76 of the lower support adapter plate 7, the second high-pressure valve 72, and the first flow channel 75 of the lower support adapter plate 7 into the digestion tube 3. After all the liquid is drawn into the digestion tube 3, the air pump continues to draw in air, and the liquid in the digestion tube 3 will continuously bubble, achieving a uniform mixing effect. Then, the air pump, the two high-pressure valves, and the solenoid three-way valve 73 stop working, the heating wire 4 starts heating, and the liquid in the digestion tube 3 begins the digestion reaction. After the set time is reached, the heating wire 4 stops working, and the fan 13 starts to cool the digestion tube 3. During this stage, the suction pump repeatedly starts and stops, performing the previous work on each flow path of the liquid receiving head 2. Once the liquid temperature in the digestion tube 3 drops to normal, the testing stage begins. The blowing pump starts blowing air, and the two high-pressure valves and the three-way solenoid valve 73 in each flow path open to create positive pressure. Other flow paths are blocked. The liquid flows through the first flow channel 75, the second high-pressure valve 72, the second flow channel 76, the solenoid three-way valve 73, and the third flow channel 77 of the lower support adapter plate 7 into the testing module for inspection. During this stage, the blowing pump repeatedly starts and stops, performing the previous work on each flow path of the digestion tube 3. The entire process is automatically controlled, easy to operate, and reduces the impact of human factors.

[0059] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0062] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the shape and structure of this utility model are within the protection scope of this utility model.

Claims

1. A digestion module for water quality testing, characterized by: The device includes a digestion tube support and a liquid receiving head. The digestion tube support houses a digestion tube, a heating module, and a temperature sensor. The top of the digestion tube support is connected to an upper support adapter plate, and the bottom is connected to a lower support adapter plate. A central hole is vertically provided in the middle of the digestion tube support, through which the digestion tube passes. The upper and lower ends of the digestion tube are clamped and fixed by the upper and lower support adapter plates. The front side wall of the digestion tube support is provided with heat dissipation holes. The upper support adapter plate is equipped with an air circuit connector, a first high-pressure valve and an air passage. The air circuit connector is connected to the suction pump and the blowing pump. One end of the air passage is connected to the air circuit connector and the other end of the air passage is connected to the digestion tube and the first high-pressure valve. The lower support adapter plate is equipped with a flow path connector, a second high-pressure valve and a flow channel. One end of the flow channel is connected to the digestion tube and the second high-pressure valve. The flow channel is also connected to the three-way solenoid valve and the flow path connector. The liquid receiving head is provided with a liquid receiving hole, and the bottom of the liquid receiving head is connected to the flow path connector.

2. The digestion module for water quality testing of claim 1, wherein: The bottom of the upper bracket adapter plate is provided with a first sealing ring that connects to the digestion tube, and the top of the lower bracket adapter plate is provided with a second sealing ring that connects to the digestion tube.

3. The digestion module for water quality testing of claim 1, wherein: The lower part of the liquid collection hole has an inverted conical structure.

4. The digestion module for water quality testing of claim 1, wherein: A fan is provided on the rear side wall of the digestion tube support, and the position of the fan is opposite to the position of the heat dissipation hole.

5. The digestion module for water quality testing of claim 1, wherein: The flow channel includes a first flow channel, a second flow channel, and a third flow channel connected in sequence. The first flow channel is connected to the digestion tube and the second high-pressure valve. The second flow channel is connected to the three-way solenoid valve and the second high-pressure valve. The third flow channel is connected to the three-way solenoid valve and the flow path connector. The first flow channel is vertically arranged, the second flow channel is inclined, and the third flow channel is horizontally arranged.

6. The digestion module for water quality testing of claim 1, wherein: The lower support adapter plate is connected to the flow path cover plate, which is located on one side of the second flow channel; the flow path cover plate is fixed to the lower support adapter plate with screws.

7. The digestion module for water quality testing of claim 1, wherein: The top of the digestion tube support is provided with a first fixing hole, and the upper support adapter plate is fixedly connected to the digestion tube support through a first fixing member and a first positioning hole; The bottom of the digestion tube support is provided with a second fixing hole, and the lower support adapter plate is fixedly connected to the digestion tube support through a second fixing member and a second positioning hole. The upper bracket adapter plate is provided with an air connection mounting hole for installing an air connection connector and a first high-pressure valve mounting hole for installing a first high-pressure valve. The lower support adapter plate is provided with a flow path connector mounting hole, a second high pressure valve mounting hole for installing a second high pressure valve, and a solenoid valve mounting hole for installing a three-way solenoid valve.

8. The digestion module for water quality testing according to any one of claims 1 to 7, characterized in that: It includes a mounting frame, which has a plurality of liquid collection head fixing holes and a plurality of digestion tube support fixing components. The digestion tube supports are fixed to the mounting frame by the digestion tube support fixing components, and the liquid collection heads are fixed to the mounting frame by the liquid collection head fixing holes. The mounting frame also has heat dissipation holes.

9. The digestion module for water quality testing of claim 8, wherein: The digestion tube support fixing component includes a fixing hole and a groove. The groove is located below the fixing hole. The digestion tube support is fixed to the mounting bracket by fixing screws that cooperate with the fixing hole. The fixing screws have bosses that cooperate with the grooves for fixing.

10. The digestion module for water quality testing of claim 9, wherein: The liquid collection head is provided with external threads, and the liquid collection head is fixed to the liquid collection head fixing hole by the external threads; The upper and lower support adapter plates are made of PEEK, nylon, or PTFE; the digestion tube support is made of aluminum alloy; and the liquid collection head is made of PFA or PTFE.

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