Portable multi-parameter water quality detector

Abstract

This invention relates to the field of water quality testing technology, specifically a portable multi-parameter water quality analyzer, comprising a main unit and a reagent kit. The main unit is equipped with a water extraction tube. A miniature water pump is located inside the main unit, and a slot matching the reagent kit is provided on the main unit. The reagent kit includes a box, a top cover, and a back plate. The detection chambers are all located below the water inlet chamber, and each detection chamber and water inlet chamber is connected by an opening. A water injection tube is provided on the top cover, and a sealing tube is slidably installed inside the water injection tube. This invention designs the reagent kit as an independent sealed unit, with a sealing tube and a closing spring inside the water injection tube. After sampling, the sealing tube automatically resets and seals the water injection tube, completely locking the water sample and reaction waste liquid inside the reagent kit. Users do not need to contact the waste liquid or perform any pouring operations, completely avoiding secondary pollution of the environment by the testing waste liquid and complying with environmental protection regulations for field operations.

Description

Technical Field

[0001] This invention relates to the field of water quality testing technology, specifically to a portable multi-parameter water quality analyzer. Background Technology

[0002] Water quality testing is a crucial component of environmental monitoring, drinking water safety assessment, and industrial wastewater management. With the increasing demand for rapid on-site testing, portable multi-parameter water quality analyzers have been widely used in scenarios such as field sampling, emergency monitoring, and rural water supply inspection due to their advantages of small size, ease of operation, and ability to provide on-site results.

[0003] Currently, commercially available portable multi-parameter water quality analyzers are mainly divided into two categories: one is direct-reading instruments based on electrochemical sensors (such as pH, dissolved oxygen, and conductivity), and the other is chemical reagent-based instruments based on colorimetry. Among them, colorimetry dominates the portable device market due to its high detection accuracy and wide parameter coverage (such as ammonia nitrogen, total phosphorus, COD, and residual chlorine).

[0004] In the colorimetric detection process, the detector usually needs to mix the water sample to be tested with a variety of chemical reagents (such as color developers, masking agents, pH adjusters, etc.) in a colorimetric bottle or reaction cell, and the concentration of pollutants is obtained by measuring the absorbance of the liquid after the reaction.

[0005] Most existing portable testing instruments use open-type cuvettes or detachable reaction chambers. To avoid reagent interactions and ensure accurate results when testing different items, it's usually necessary to replace the cuvettes with different ones after each test, making the testing process complex. Furthermore, after a test, the water sample contains the chemical reagents added during the test. These cuvettes need to be removed from the instrument, sealed, and then replaced with the next cuvette. This process of removal and replacement can easily lead to leakage and secondary contamination.

[0006] Moreover, since various chemical reagents for testing need to be carried, the complex terrain during field testing can easily cause reagent leakage and contamination due to bumps or other environmental factors during walking and testing.

[0007] Therefore, a portable multi-parameter water quality analyzer is proposed. Summary of the Invention

[0008] The purpose of this invention is to provide a portable multi-parameter water quality analyzer that solves the problems of complex detection operations and easy leakage of chemical reagents that cause pollution, as mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A portable multi-parameter water quality analyzer includes a main unit and a reagent kit. The main unit has a water suction pipe, which can be a rigid pipe, a flexible pipe, or a retractable corrugated pipe. A miniature water pump is installed inside the main unit, and the inlet of the miniature water pump is connected to the water suction pipe. The main unit has a slot that matches the reagent kit, and an outlet pipe is located at the top of the slot, connected to the outlet of the miniature water pump. A pressure plate is horizontally slidably mounted on the upper side of the slot, and a connector is fixedly mounted on the pressure plate. The connector passes through the pressure plate and is slidably engaged within the outlet pipe. A return spring is installed inside the outlet pipe to keep the connector pushed upwards. The main unit also has a starting slot connected to the slot, and a starting rod is horizontally mounted inside the starting slot. The starting rod is fixedly connected to the pressure plate. A start button is located at the bottom of the starting slot and is electrically connected to the miniature water pump. The reagent kit includes a box body, a top cover, and a back panel, wherein the back panel is made of transparent plastic or transparent glass. The box body, top cover, and back panel together form a sealed chamber, which is further divided into an inlet chamber and multiple detection chambers. The detection chambers are all located below the inlet chamber, and each detection chamber is connected to the inlet chamber by a through-hole. The detection chambers are used to store powdered test reagents. The top cover is provided with a water injection tube that matches the connector. A hollow sealing tube is slidably installed inside the water injection tube. The top of the sealing tube is open and the bottom is closed. A liquid outlet is horizontally opened on the lower side of the sealing tube, penetrating the sealing tube. The water injection tube is also provided with a sealing spring for keeping the sealing tube pushed upward.

[0010] In use, insert the pumping tube into the water body to be sampled. Then, simply insert the reagent kit with the top cap facing upwards into the slot, aligning the injection tube with the insertion tube. Pull the starter rod downwards along the starter groove. The starter rod moves the pressure plate and insertion tube downwards, causing the insertion tube to insert into the injection tube. At this point, the return spring is compressed. As the insertion tube is inserted into the injection tube, it pushes down the sealing tube inside the injection tube, exposing the bottom of the sealing tube and its outlet. The insertion tube then connects to the inlet chamber. As the starter rod moves downwards, finally pressing the start button activates the micro-pump, drawing water and delivering the sample to the inlet chamber. The water sample then enters different detection chambers through various openings, contacting the detection reagents inside and initiating the reaction.

[0011] Because the inlet chamber is sealed, once the extracted water sample has filled to a certain level, no more water sample can be added to the reagent kit. At this point, the starting lever can be released, and the pressure plate and connector will return to their original positions under the action of the reset spring, disengaging the connector from the water inlet tube. Without the pressure of the water inlet tube, the sealing tube also returns to its original position under the action of the sealing spring, re-entering the water inlet tube and resealing it. At this point, the water sample inside the reagent kit cannot leave the kit, achieving a sealing effect during sampling. After sampling, simply remove the reagent kit and perform colorimetric analysis on the liquid inside each detection chamber. Then, you can replace it with the next reagent kit to sample and test the next body of water. The operation is convenient.

[0012] By separating the water quality analyzer into a main unit and reagent kits, and pre-encapsulating multiple reagents within the kit's various detection chambers, multiple tests can be performed simultaneously by drawing water samples from an external water body through the main unit and injecting them into the kit. This eliminates the need for frequent sampling and reagent replacement, significantly improving the device's ease of use. Furthermore, because the reagent kit's injection tube is sealed when not in use, the reagents and the tested water sample will not leak from the kit into the external environment, achieving a "test-and-encapsulate" function. This effectively solves the problems of difficult post-test water sample disposal and potential leakage that could pollute the environment. Simultaneously, pre-encapsulating multiple reagents within a single kit facilitates rapid testing and prevents the omission of any test items.

[0013] Moreover, the entire device only requires controlling one start lever to perform sampling and testing operations, eliminating the need for extra steps and further improving the ease of use of the device.

[0014] Preferably, each detection chamber is divided into a water inlet and a reaction chamber. The inlet is connected to the top of the water inlet, and the lower side of the water inlet is connected to the lower side of the reaction chamber. The reaction chamber is provided with a partition platform, and a reaction port for liquid flow is opened on the partition platform. The partition platform is provided with an elastic plastic baffle. One end of the plastic baffle is fixedly installed on one side of the reaction port, and the other end is a free end that is tilted upward and overlaps the other side of the reaction port. The plastic baffle is used to separate the reaction chamber and the water inlet. Powdered detection reagents are stored in the reaction chamber.

[0015] By setting up a partition and plastic baffles, the powdered test reagents are stored in the reaction section and isolated by the plastic baffles. This prevents the reagents from tilting and entering the water inlet chamber from the inlet when the test personnel are carrying the reagent kits. It also avoids the problem of different reagents mixing together, which would lead to poor test results.

[0016] When extracting water samples, the micro-pump draws pressurized water. After entering the inlet, the sample moves downwards, pressing upwards against a plastic baffle. This causes the baffle to bend and deform, opening the reaction port and allowing the water sample to enter the reaction chamber and react with the powdered reagent. Once the reaction chamber is filled with water, and the pressure prevents further sample entry, the plastic baffle reshapes and closes the reaction port after the pressure equalizes, effectively preventing dissolved reagents from flowing into other reaction chambers and interfering with other tests, thus ensuring the accuracy of water quality testing.

[0017] The purpose of placing the connection between the reaction section and the water inlet section on the lower side is to change the direction of the water flow. Because under gravity, the powdered test reagent falls onto the plastic baffle and the partition platform, and the water flows upwards, it can contact the test reagent immediately and carry it upwards. The water flow can quickly disperse the test reagent, allowing it to react more rapidly and fully with the water, thus improving the detection reaction rate.

[0018] Preferably, a partition is slidably installed inside the water inlet chamber. The partition is inverted "n" shape and divides the water inlet chamber into a liquid chamber and a gas chamber. The liquid chamber is located on the lower side, and the lower end of the water injection pipe is located in the liquid chamber. The liquid chamber and the gas chamber are sealed and isolated by the partition. A top spring is provided in the gas chamber to keep the partition pushed downward. An exhaust hole is provided on the top plate, and a sealing block is fixedly installed on the partition. When the partition moves upward to its limit position, the sealing block inserts into the exhaust hole and seals the exhaust hole.

[0019] By incorporating a baffle, as water sample enters the liquid chamber through the injection tube, the rising water level creates an upward buoyancy force on the baffle. This buoyancy forces the baffle to overcome the pressure of the top spring and move upwards. Simultaneously, gas in the gas chamber can escape through the vent on the top plate, ensuring the baffle moves smoothly upwards. This allows more water sample to enter the reagent kit, preventing excessive gas buildup during initial packaging, which could lead to excessive internal pressure during water sampling and insufficient water sample to enter the detection chambers and react with the reagents.

[0020] When the liquid chamber is filled to the preset water level, the partition rises to its limit position, and the sealing block precisely inserts into and seals the vent, creating a closed space in the gas chamber. This prevents the reacted water sample from flowing into the gas chamber and leaking through the vent during reagent kit transport due to shaking. At this point, the pressure between the liquid and gas chambers reaches equilibrium, effectively preventing further water sample from entering.

[0021] Preferably, each of the reaction sections is provided with a connecting pipe at its top, the connecting pipe being used to connect the reaction section to the gas chamber, a float plate being slidably installed inside the reaction section, the float plate being located above the plastic baffle, and the powdered detection reagent being stored between the plastic baffle and the float plate.

[0022] By incorporating a connecting pipe and a float, as the water sample enters the reaction chamber, the float moves upward under buoyancy as the water level rises. Since the connecting pipe links the reaction chamber to the gas chamber, air above the float in the reaction chamber can be discharged into the gas chamber through the connecting pipe when the float moves upward, ensuring the float can float smoothly and providing sufficient space for the water sample to enter and react. Simultaneously, the float exerts a certain squeezing and pushing effect on the powdered reagent below it. When the water sample impacts the plastic baffle and enters the reaction chamber from below, it spreads outwards as the float rises with the water level. Due to the relatively small internal space of the reaction chamber, the side walls prevent the water sample from impacting the float, causing a backflow that further disperses and disrupts the powdered reagent, promoting thorough mixing and contact between the reagent and the water sample, and accelerating the dissolution and reaction rates.

[0023] Preferably, the partition is provided with a side plate on the side away from the water injection pipe. The side plate is located in the liquid chamber. A push plate is horizontally slidably installed in the liquid chamber. The bottom of the push plate is in contact with the bottom of the water inlet chamber. The top and left and right sides of the push plate are respectively in contact with the bottom and left and right sides of the "n"-shaped partition. A horizontal spring is horizontally installed on the side plate. The horizontal spring is used to keep pushing the side plate towards the water injection pipe.

[0024] By setting up a pusher plate, during sampling, the pusher plate first blocks the water sample, allowing the water sample to fill the detection chamber closest to the water injection pipe. After the water sample can no longer enter the first detection chamber closest to the water injection pipe, the water flow pressure pushes the pusher plate to move and expose the opening connecting to the next detection chamber. The water flow then begins to enter the next detection chamber. This ensures that each detection chamber is filled with water sample in sequence, avoiding the situation where some detection chambers are not filled due to uneven water flow distribution.

[0025] Specifically, when the water sample first enters the liquid chamber, the pusher plate, under the action of the horizontal spring, is positioned closer to the water injection pipe. At this time, only the opening corresponding to the detection chamber closest to the water injection pipe is open, and the water sample preferentially enters that detection chamber. As the detection chamber is gradually filled with water sample, the internal pressure increases, and the pushing force of the water flow on the pusher plate gradually overcomes the elastic force of the horizontal spring, pushing the pusher plate away from the water injection pipe. During the movement of the pusher plate, the openings of subsequent detection chambers are opened sequentially, allowing the water sample to flow into each detection chamber in order until all detection chambers are filled. This structural design ensures that each detection chamber receives sufficient water sample to react with the reagents, further improving the accuracy and reliability of the detection results.

[0026] Preferably, a groove is provided between the top of the reaction section and the top of the water inlet section. An elastic sealing sheet made of plastic sheet is slidably installed inside the groove. The elastic sealing sheet includes a raised part and a horizontal part. The horizontal part is horizontally slidably inserted into the groove. The raised part is located inside the reaction section and bends downward. The end of the raised part away from the horizontal part abuts against the side wall of the reaction section away from the water inlet section.

[0027] By incorporating a chute and an elastic sealing plate, along with a float plate, as the float plate moves upward under the buoyancy of the water sample, it gradually contacts and compresses the raised portion of the elastic sealing plate. Because the raised portion is bent downwards and elastic, it undergoes upward elastic deformation under the pressure of the float plate. As the float plate compresses, the raised portion gradually adheres to the top of the reaction section. Furthermore, as the raised portion straightens, it pushes the horizontal portion to extend horizontally towards the water inlet and blocks the opening, thereby further preventing the reacted liquid in the reaction section from flowing back to the water inlet.

[0028] In this way, even if the plastic baffle fails to completely seal the reaction port due to an accident, the elastic sealing sheet can act as a second barrier, achieving double protection and effectively avoiding cross-contamination of reagents between different detection chambers, further improving the accuracy and reliability of the test results.

[0029] After the test is completed, the reagent kit is opened and all the sealed water samples are poured out. Due to the loss of water sample pressure, the elastic sealing sheet can return to its original shape under its own elasticity. The raised part bends downward again, and the horizontal part retracts into the groove, so that the opening is open again.

[0030] Preferably, the top of the partition is provided with multiple storage slots corresponding to multiple reaction sections. The top of each storage slot and the side facing the back plate are provided with openings. The top cover is provided with multiple top rods corresponding to multiple storage slots. Each top rod is provided with a sealing plate at its bottom. The sealing plate is used to insert into the storage slot and seal the top of the storage slot. Each sealing plate is provided with a needle at its bottom. An air bladder is provided inside the storage slot. The air bladder is used to seal and store liquid detection reagents. The storage slot, together with the back plate and the sealing plate, forms a sealed chamber. The bottom of the partition is provided with multiple injection tubes corresponding to multiple reaction sections. Each injection tube penetrates the top of the corresponding reaction section and penetrates the float plate inside the reaction section. The injection tube is used to connect the storage slot and the corresponding reaction section.

[0031] After each detection chamber is filled with water sample, the pressure in the liquid chamber increases when the sample is injected, pushing the baffle upwards. The baffle then expels air from the gas chamber through the vent. As the baffle moves upwards, the storage tank moves upwards simultaneously, with the top cover sliding relative to the storage tank. As the baffle continues to move the airbag upwards, the needle on the top cover punctures the airbag, allowing the liquid reagent inside to flow into the storage tank. With the baffle's upward movement, the pressure inside the storage tank gradually increases, and the liquid reagent is injected into the corresponding reaction section through the injection tube. The injection tube passes through the float, which remains unaffected by its vertical movement, allowing the liquid reagent to directly enter the reaction space below the float and react with the water sample, which has already been thoroughly mixed with the powdered reagent. By pre-setting the liquid reagent in the storage tank, the powdered and liquid reagents are added in stages. After the water sample reacts initially with the powdered reagent, the liquid reagent is injected for a secondary reaction, simulating more complex detection processes and improving the diversity and accuracy of the detection results. The sealing plate also prevents water from flowing into the gas chamber when the water sample is mixed with the powdered reagent, and prevents water from leaking out of the vent.

[0032] For example, some water quality testing requires first removing interfering substances with powdered reagents (e.g., sodium potassium tartrate (masking agent) + sodium hydroxide (pH adjuster)) before adding liquid colorimetric reagents (e.g., Nessler's reagent) for color development. This step-by-step addition method perfectly meets the needs of such tests. Meanwhile, the injection of liquid reagents is triggered by the mechanical movement of the baffle, requiring no additional operation, further simplifying the testing steps and ensuring precise timing of reagent addition.

[0033] Preferably, each of the plastic baffles has a plurality of protrusions on its free end, and the plurality of protrusions are evenly spaced along the length of the plastic baffle.

[0034] When water flows through the reaction port, the protrusions create disturbance to the water flow, generating eddies and enhancing the flushing and stirring effect of the water flow on the powdered test reagent below the plastic baffle.

[0035] These protrusions act like small flow guides. When the water sample impacts the plastic baffle from bottom to top, the water flow creates local turbulence between the protrusions. This not only disperses the reagents more effectively but also drives the reagent particles upward, increasing their contact area with the water sample and making the mixing more uniform. This further accelerates the dissolution rate and reaction efficiency of the reagents, ensuring more accurate and reliable test results.

[0036] Preferably, the box body, top plate, and back plate are all detachably sealed. Because the reagent kit design in this invention is relatively complex, the detachable sealed connection method can significantly reduce assembly difficulty when considering factors such as production, installation, and subsequent maintenance.

[0037] During the production process, the individual components of the box body, top plate, and back plate can be processed separately, and then assembled using sealing connectors (such as sealing bolts and sealing rings). This facilitates precise adjustment of internal structures such as the detection chamber and connecting tubes. Simultaneously, it allows testing personnel to pre-package different reagent combinations into the reagent kit according to different testing requirements, making it convenient to carry to the site for rapid testing. This enables flexible combination of testing items, unlike some water quality analyzers that can only detect a few indicators.

[0038] During later maintenance, if the internal structure malfunctions or vulnerable parts (such as elastic sealing sheets, airbags, etc.) need to be replaced, the corresponding connecting parts can be disassembled for repair or replacement, eliminating the need to discard the entire reagent kit and effectively reducing usage costs.

[0039] Meanwhile, the detachable connection design also facilitates subsequent optimization and upgrades of the reagent kit structure. Functional updates can be achieved simply by replacing the corresponding modules, enhancing the applicability and lifespan of the equipment.

[0040] Preferably, the end of the pressure plate away from the insertion tube is provided with a downwardly inclined squeezing tab, which is used to horizontally squeeze the reagent kit into the slot when the pressure plate moves downward.

[0041] By incorporating a squeeze tab, when the starting lever is pulled, the squeeze tab contacts the top edge of the reagent kit as the pressure plate moves downwards. Due to the downward-sloping design of the squeeze tab, the force generated by its contact with the reagent kit can be decomposed into two components: a vertical downward force and a horizontal inward force. The vertical downward force further enhances the pressure plate's clamping effect on the reagent kit, while the horizontal inward force pushes the reagent kit towards the slot, ensuring a more stable position within the slot and further positioning the reagent kit to ensure alignment between the insertion tube and the water infusion tube. This structural design cleverly utilizes mechanical principles, achieving both positioning and fixation of the reagent kit simultaneously through the movement of the pressure plate without adding extra operational steps.

[0042] Preferably, a humidity sensor is provided on the lower side of the pressure plate corresponding to the exhaust hole. A connecting spring is provided between the humidity sensor and the bottom of the pressure plate. The top end of the connecting spring is fixedly installed on the bottom of the pressure plate, and the bottom end of the connecting spring is fixedly connected to the humidity sensor. The sealing block is wrapped with a water-guiding layer. The water-guiding layer is made of a porous material with a hydrophilic surface. The bottom of the water-guiding layer is fixedly connected to the top surface of the partition. A buzzer is provided on the main body. The humidity sensor is electrically connected to the buzzer and the humidity sensor is electrically connected to the start button.

[0043] By setting a humidity sensor and using a connecting spring to extend downward into the vent hole when the pressure plate moves downward, when a water sample accidentally leaks through the partition into the gas chamber and comes into contact with the water-conducting layer on the partition, the hydrophilic porous material will quickly absorb the moisture and transfer the moisture to the top of the sealing block through capillary effect. The humidity sensor can detect the humidity change by contacting the water-conducting layer.

[0044] At this point, the humidity sensor will immediately trigger a buzzer alarm, alerting the operator that the reagent kit may have a seal failure, allowing for timely intervention. Simultaneously, it will forcibly disconnect the start button's circuit, interrupting the micro-pump's pumping action to prevent further water from entering the sealed reagent kit, giving the operator sufficient time to seal the vent. This prevents the partition from failing to rise under water pressure due to insufficient sealing and thus avoids environmental pollution caused by chemical reagent leakage.

[0045] The electrical connection between the humidity sensor and the start button ensures that the sealing status is monitored from the beginning of the detection process, forming an intelligent sensing system that further guarantees the stability of the equipment during operation.

[0046] The humidity sensor is mounted by connecting a spring, which can contract under pressure. This ensures that when the partition is properly sealed, the humidity sensor inserted into the vent will not interfere with the upward movement of the sealing block.

[0047] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The portable multi-parameter water quality analyzer designed in this invention utilizes a reagent kit as an independent sealed unit. The water injection tube contains a sealing tube and a closing spring. After sampling, the sealing tube automatically resets and seals the water injection tube, completely locking the water sample and reaction waste liquid inside the reagent kit. Users do not need to handle the waste liquid or perform any pouring operations, completely avoiding secondary pollution of the environment by the testing waste liquid and complying with environmental protection regulations for field operations.

[0048] 2. The portable multi-parameter water quality analyzer designed in this invention, through the design of the starter rod and reagent kit, allows users to complete a series of actions sequentially, including connecting the pipe, opening the seal, starting the water pump, injecting the water sample, and automatically resetting, simply by placing the pumping tube into the water, inserting the reagent kit, and pulling down the starter rod. The entire testing process eliminates the need for step-by-step reagent addition and repeated disassembly, significantly reducing the operational threshold and human error in on-site testing.

[0049] 3. The portable multi-parameter water quality analyzer designed in this invention opens the ports of each detection chamber sequentially by setting a push plate, ensuring that each detection chamber can obtain sufficient water samples; a double anti-backflow barrier is formed by a plastic baffle and an elastic sealing sheet to avoid cross-contamination between different detection chambers; combined with the design of the float plate and the protrusion, the water flow forms turbulence in the narrow space, promoting the rapid dissolution and uniform mixing of powdered reagents, thereby ensuring the accuracy and repeatability of the test results. Attached Figure Description

[0050] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a perspective view of the internal structure of the host body in this invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the internal structure of the reagent kit and the host body in this invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 For the present invention Figure 5 Enlarged view of point C in the middle; Figure 7 This is an exploded view of the reagent kit of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point D in the middle; Figure 9 This is a perspective view of the partition and the box body in this invention. Figure 10 This is a front view of the partition and the box body in this invention. Figure 11 For the present invention Figure 10 Sectional view at EE; Figure 12 This is a three-dimensional structural diagram of the partition in this invention; Figure 13 This is a schematic diagram of the water-diverting layer in this invention.

[0051] In the diagram: 1. Main unit; 2. Reagent kit; 201. Box body; 202. Top cover; 203. Back plate; 3. Water inlet pipe; 4. Miniature water pump; 5. Slot; 6. Water outlet pipe; 7. Pressure plate; 8. Insertion pipe; 9. Reset spring; 10. Start-up slot; 11. Start-up lever; 12. Start-up button; 13. Water inlet chamber; 131. Liquid chamber; 132. Gas chamber; 14. Detection chamber; 141. Water inlet section; 142. Reaction section; 15. Port; 16. Water injection pipe; 17. Sealing tube; 18. Liquid outlet; 19. Sealing spring; 20. Divider platform; 2 1. Reaction port; 22. Plastic baffle; 23. Partition; 24. Top spring; 25. Vent; 26. Connecting pipe; 27. Float; 28. Side plate; 29. ​​Push plate; 30. Horizontal spring; 31. Slide groove; 32. Elastic sealing sheet; 321. Raised part; 322. Horizontal part; 33. Storage tank; 34. Top rod; 35. Sealing plate; 36. Needle; 37. Airbag; 38. Injection tube; 39. Protrusion; 40. Extrusion plate; 41. Sealing block; 42. Humidity sensor; 43. Connecting spring; 44. Water-conducting layer; 45. Buzzer. Detailed Implementation

[0052] Please see Figures 1 to 12 This invention provides a portable multi-parameter water quality analyzer, the technical solution of which is as follows: A portable multi-parameter water quality analyzer, reference Figures 1 to 4 The kit includes a main unit 1 and a reagent kit 2. The main unit 1 is equipped with a water pump 3, which can be a rigid pipe, a flexible pipe, or a retractable corrugated pipe. The main unit 1 contains a miniature water pump 4, and a power supply for the miniature water pump 4 is also located inside the main unit 1. The inlet of the miniature water pump 4 is connected to the pumping pipe 3. The main body 1 has a slot 5 that matches the reagent kit 2. A water outlet pipe 6 is located at the top of the slot 5 and is connected to the outlet of the miniature water pump 4. A pressure plate 7 is horizontally slidably mounted on the upper side of the slot 5. A connector 8 is fixedly mounted on the pressure plate 7, passing through the pressure plate 7 and slidably engaged within the water outlet pipe 6. A return spring 9 is installed inside the water outlet pipe 6 to keep the connector 8 pushed upwards. The main body 1 also has a starting groove 10 connected to the slot 5. A starting rod 11 is horizontally mounted inside the starting groove 10 and is fixedly connected to the pressure plate 7. A start button 12 is located at the bottom of the starting groove 10 and is electrically connected to the miniature water pump 4. A downwardly inclined squeezing plate 40 is also provided at the end of the pressure plate 7 away from the connector 8.

[0053] refer to Figures 5 to 10The reagent kit 2 includes a box body 201, a top cover 202, and a back plate 203, all of which are detachably and sealed together. The back plate 203 is made of transparent plastic or transparent glass. The box body 201, top cover 202, and back plate 203 together form a sealed chamber, which is further divided into an inlet chamber 13 and multiple detection chambers 14.

[0054] refer to Figure 5 and Figure 6 The top cover 202 is provided with a water injection pipe 16 that matches the insertion pipe 8. A hollow sealing pipe 17 is slidably installed inside the water injection pipe 16. The top of the sealing pipe 17 is open and the bottom is closed. A liquid outlet 18 is horizontally opened on the lower side of the sealing pipe 17, which passes through the sealing pipe 17. The water injection pipe 16 is also provided with a sealing spring 19 for keeping the sealing pipe 17 pushed upward.

[0055] Among them, reference Figure 5 , Figure 6 , Figure 7 as well as Figure 12 A partition 23 is slidably installed inside the water inlet chamber 13. The partition 23 is inverted "n" shape and divides the water inlet chamber 13 into a liquid chamber 131 and a gas chamber 132. The liquid chamber 131 is located on the lower side, and the lower end of the water injection pipe 16 is located in the liquid chamber 131. The liquid chamber 131 and the gas chamber 132 are sealed and isolated by the partition 23. A top spring 24 is provided in the gas chamber 132 to keep the partition 23 pushed downward. An exhaust hole 25 is provided on the top cover 202. A sealing block 41 is fixedly installed on the partition 23. When the partition 23 moves upward to the limit position, the sealing block 41 is inserted into the exhaust hole 25 and seals the exhaust hole 25.

[0056] refer to Figure 5 , Figure 6 as well as Figure 12 A side plate 28 is provided on the side of the partition 23 away from the water inlet pipe 16. The side plate 28 is located inside the liquid chamber 131. A push plate 29 is horizontally slidably installed inside the liquid chamber 131. The bottom of the push plate 29 is in contact with the bottom of the water inlet chamber 13, and the top and left and right sides of the push plate 29 are in contact with the bottom and left and right sides of the "n"-shaped partition 23, respectively. A horizontal spring 30 is horizontally installed on the side plate 28. The elastic force of the horizontal spring 30 is less than that of the top spring 24. The horizontal spring 30 is used to keep the side plate 28 pushed towards the water inlet pipe 16.

[0057] In addition, refer to Figures 5 to 11Each detection chamber 14 is located below the water inlet chamber 13, and each detection chamber 14 is connected to the water inlet chamber 13 by a through-hole 15. Each detection chamber 14 is further divided into a water inlet section 141 and a reaction section 142. The through-hole 15 is connected to the top of the water inlet section 141, and the lower side of the water inlet section 141 is connected to the lower side of the reaction section 142. The reaction section 142 is provided with a partition platform 20, and a reaction port 21 for liquid flow is opened on the partition platform 20. An elastic plastic baffle 22 is provided on the partition platform 20. One end of the plastic baffle 22 is fixedly installed on one side of the reaction port 21, and the other end is a free end that is tilted upward and overlaps the other side of the reaction port 21. The plastic baffle 22 is used to separate the reaction section 142 and the water inlet section 141. The reaction section 142 contains powdered detection reagents. Each plastic baffle 22 also has multiple protrusions 39 on its free end, and the multiple protrusions 39 are evenly spaced along the length of the plastic baffle 22.

[0058] refer to Figure 5 and Figure 6 Each reaction section 142 is provided with a connecting pipe 26 at the top. The connecting pipe 26 is used to connect the reaction section 142 with the gas chamber 132. A float plate 27 is slidably installed inside the reaction section 142. The float plate 27 is located on the upper side of the plastic baffle 22. Powdered test reagents are stored between the plastic baffle 22 and the float plate 27.

[0059] refer to Figure 6 A groove 31 is provided between the top of the reaction section 142 and the top of the water inlet section 141. An elastic sealing sheet 32 ​​made of plastic sheet is slidably installed inside the groove 31. The elastic sealing sheet 32 ​​includes a raised part 321 and a horizontal part 322. The horizontal part 322 is horizontally slidably inserted into the groove 31. The raised part 321 is located inside the reaction section 142 and is bent downward. The end of the raised part 321 away from the horizontal part 322 abuts against the side wall of the reaction section 142 away from the water inlet section 141.

[0060] In addition, refer to Figure 7 as well as Figures 9 to 12The top of the partition 23 is provided with multiple storage slots 33 corresponding to multiple reaction sections 142. The top of the storage slots 33 and the side facing the back plate 203 are provided with openings. The top cover 202 is provided with multiple push rods 34 corresponding to multiple storage slots 33. Each push rod 34 is provided with a sealing plate 35 at its bottom. The sealing plate 35 is used to insert into the storage slot 33 and seal the top of the storage slot 33. Each sealing plate 35 is provided with a needle 36 at its bottom. An air bladder 37 is provided inside the storage slot 33. The air bladder 37 is used to seal and store liquid test reagents. The storage slot 33, together with the back plate 203 and the sealing plate 35, forms a sealed chamber. The bottom of the partition 23 is provided with multiple injection tubes 38 corresponding to multiple reaction sections 142. Each injection tube 38 penetrates the top of the corresponding reaction section 142 and penetrates the float plate 27 inside the reaction section 142. The injection tube 38 is used to connect the storage slot 33 with the corresponding reaction section 142.

[0061] refer to Figure 4 and Figure 13 To better understand whether the reagent kit 2 leaks during the sampling process, a humidity sensor 42 is also provided on the lower side of the pressure plate 7 corresponding to the vent 25. A connecting spring 43 is provided between the humidity sensor 42 and the bottom of the pressure plate 7. The top end of the connecting spring 43 is fixedly installed on the bottom of the pressure plate 7, and the bottom end of the connecting spring 43 is fixedly connected to the humidity sensor 42. The sealing block 41 is wrapped with a water-absorbing layer 44. The water-absorbing layer 44 is made of a porous material with a hydrophilic surface, such as a sponge. The bottom of the water-absorbing layer 44 is fixedly connected to the top surface of the partition 23. A buzzer 45 is provided on the main body. The humidity sensor 42 is electrically connected to the buzzer 45, and the humidity sensor 42 is also electrically connected to the start button 12.

[0062] Working principle of the invention: Before use, depending on the different needs of water body testing, set the corresponding test reagents in the corresponding reagent kit 2, including the location for storing powdered test reagents and the location for loading liquid test reagents.

[0063] In use, hold the main unit 1 and walk to the side of the water to be tested. Then, with the top plate of the reagent kit 2 facing the pressure plate 7, insert the reagent kit 2 into the slot 5 and press it down. Next, insert the water inlet tube 3 into the water to be tested. Then, pull the starting rod 11 down along the starting groove 10. When the starting rod 11 moves downward, it will drive the pressure plate 7 to move downward synchronously. At this time, the insertion tube 8 on the pressure plate 7 will overcome the elastic force of the return spring 9 in the water outlet tube 6 and move downward. At the same time, during the downward movement of the pressure plate 7, the squeezing plate 40 at its end will contact the top edge of the reagent kit 2. Through the downward tilting design, a horizontal inward component force is generated, squeezing the reagent kit 2 into the slot 5, ensuring that the reagent kit 2 is stably positioned in the slot 5 and that the insertion tube 8 is precisely aligned with the water inlet tube 16.

[0064] refer to Figures 3 to 6As the pressure plate 7 moves downward, the lower end of the insertion tube 8 is inserted into the water injection tube 16 of the reagent kit 2 and aligns with the top opening of the sealing tube 17. As the insertion tube 8 continues to be pressed down, the sealing tube 17 slides downward within the water injection tube 16 and compresses the sealing spring 19. When the outlet 18 on the sealing tube 17 extends downward below the bottom end of the water injection tube 16 and into the liquid chamber 131, the passage of the water injection tube 16 is opened.

[0065] refer to Figures 2 to 4 When the start lever 11 moves downward to a certain extent, it will touch the start button 12 at the bottom of the start slot 10, and the start button 12 will trigger the micro water pump 4 to start working.

[0066] refer to Figures 5 to 11 The micro water pump 4 extracts a water sample from the water body to be tested through the pumping pipe 3. The water sample passes sequentially through the micro water pump 4, the outlet pipe 6, the insertion pipe 8, and the sealing pipe 17, and enters the liquid chamber 131 of the water inlet chamber 13 of the reagent kit 2 from the liquid outlet 18 of the sealing pipe 17. After the water sample enters the liquid chamber 131, due to the setting of the push plate 29, the water sample will first flow into the area with lower pressure. In this way, the water sample first enters the water inlet 141 of the first detection chamber 14 from the opening 15 closest to the water injection pipe 16. After the water sample enters the water inlet 141, it will squeeze the plastic baffle 22 on the partition platform 20 from below. Under the action of the water sample pressure, the plastic baffle 22 bends upward and tilts upward. At this time, the reaction port 21 opens, and the water sample smoothly enters the reaction section 142 of the first detection chamber 14 and mixes with the powdered detection reagent in the reaction section 142. When the water sample passes through the reaction port 21, the multiple extrusion plates 40 on the plastic baffle 22 can agitate the water flow, allowing the water sample to mix thoroughly with the powdered test reagent.

[0067] refer to Figures 5 to 8 As water samples continuously enter the reaction section 142 of the first detection chamber 14, the water samples begin to push the float 27 upward. When the float 27 moves upward, it squeezes the air inside the reaction section 142 of the first detection chamber 14 upward, allowing the air inside the reaction section 142 to be discharged into the gas chamber 132 through the connecting pipe 26, and discharged out of the reagent kit 2 from the exhaust port 25 at the top of the gas chamber 132. This ensures that the water sample can smoothly fill the reaction section 142 of the first detection chamber 14, ensuring that there is enough water sample to mix and react with the powdered test reagent.

[0068] refer to Figure 5 , Figure 6As the water sample continuously pushes the float 27 upward, the float 27 compresses the raised portion 321 of the elastic sealing sheet 32. Because the raised portion 321 is bent downwards and elastic, under the pressure of the float 27, it undergoes upward elastic deformation. The raised portion 321 gradually adheres to the top of the reaction section 142 as the float 27 compresses it. Furthermore, as the raised portion 321 straightens, it pushes the horizontal portion 322 to extend horizontally towards the water inlet 141 and block the opening 15. At this point, the water sample has completely filled the first detection chamber 14. The plastic baffle 22, having lost the impact of the water flow, resets under its own elasticity and re-closes the reaction port 21. The elastic sealing sheet 32 ​​also seals the opening 15. Under this double barrier, the water sample in the first detection chamber 14 cannot flow back into the liquid chamber 131, preventing the reagent in the first detection chamber 14 from affecting the reaction between the reagent and water sample in other detection chambers 14.

[0069] refer to Figure 5 , Figure 6 Since the first detection chamber 14 is already full of water, as the water sample is continuously filled into the liquid chamber 131, the pressure inside the liquid chamber 131 increases. The water sample inside the liquid chamber 131 begins to push the push plate 29 to move horizontally, and the horizontal spring 30 is compressed. When the push plate 29 moves and exposes the second opening 15, the water sample begins to enter the second opening 15 under pressure and begins to fill the second detection chamber 14 in the same way as filling the first detection chamber 14.

[0070] This process continues until all the detection chambers 14 are filled and sealed in sequence, and the water sample inside each detection chamber 14 has fully reacted with the powdered detection reagent in its respective reaction section 142.

[0071] Then, refer to Figure 7 , Figure 9 , Figure 10 as well as Figure 11 As the water sample continues to enter the liquid chamber 131, the pressure inside the liquid chamber 131 increases and begins to push the partition 23 upward. As the partition 23 moves, the multiple storage slots 33 on the partition 23 also cause the air bladders 37 inside them to move upward. As the air bladders 37 move upward, the needles 36 below the sealing plate 35 on the top cover 202 will puncture the air bladders 37 in the corresponding storage slots 33 and release the liquid detection reagents in the air bladders 37 into the corresponding storage slots 33. Furthermore, as the partition 23 moves upward, the space inside the storage slots 33 decreases and the air pressure increases. Under the action of air pressure, the liquid detection reagents inside the storage slots 33 enter the corresponding injection tubes 38 and are finally injected into the corresponding reaction section 142 to react with the water sample.

[0072] refer to Figures 1 to 4 as well as Figure 5 and Figure 7When the partition 23 moves upward to its limit position, the sealing block 41 on the partition 23 abuts against the vent 25 and seals the vent 25. At this time, the micro water pump 4 is no longer able to pump the water sample into the liquid chamber 131. At this time, the start lever 11 is released, and the start lever 11 is reset under the action of the return spring 9. The start button 12 stops, the micro water pump 4 stops, and the pressure plate 7 and the insertion pipe 8 are also reset under the action of the return spring 9. Since the downward pressure of the insertion pipe 8 is lost, the sealing pipe 17 is also retracted into the water injection pipe 16 under the action of the sealing spring 19, and the water injection pipe 16 is also resealed.

[0073] At this point, the entire reagent kit 2 is completely sealed, and the water sample inside can no longer flow out of the reagent kit 2. The reagent kit 2 can then be pulled out of the slot 5 and compared one by one with the colorimetric card according to the items detected in the corresponding detection chamber 14.

[0074] For other testing items, simply replace the kit with the corresponding test reagent and repeat the above steps to perform the test again.

[0075] Throughout the entire testing process, refer to Figure 4 and Figure 13 As the pressure plate begins to move downwards, the humidity sensor 42 at the bottom of the pressure plate moves downwards under the action of the connecting spring 43 and the pressure plate 7, extending into the vent hole and abutting against the top of the sealing block 41. When water sample accidentally leaks through the partition 23 into the gas chamber 132 and comes into contact with the water-conducting layer 44 on the partition 23, the hydrophilic porous material will quickly absorb the moisture and transfer it to the top of the sealing block 41. The humidity sensor 42 can detect the humidity change by contacting the water-conducting layer 44.

[0076] At this moment, the humidity sensor 42 will immediately trigger the buzzer 45 to sound an alarm, reminding the operator that there may be a sealing failure in the reagent kit 2, so that timely measures can be taken to seal the vent 25 before the water sample fills the entire gas chamber and overflows from the vent 25, preventing contamination caused by the water sample mixed with chemical reagents. At the same time, the circuit of the start button 12 will be forcibly cut off, interrupting the pumping action of the micro water pump 4, preventing more water from filling the sealed reagent kit, and giving the experimenter enough time to seal the vent.

[0077] The electrical connection between the humidity sensor 42 and the start button 12 ensures that the sealing status is monitored at the beginning of the detection process, forming an intelligent sensing system that further guarantees the stability of the equipment during operation.

[0078] The water-conducting layer 44, made of hydrophilic porous material, conducts water through capillary effect. In the absence of a sealing problem with the partition 23, the partition 23 can drive the sealing block 41 to move upward and press against the vent 25, sealing the vent 25. When the water-conducting layer 44 at the top of the sealing block 41 is pressed against the edge of the vent 25, the pressure compresses the loose porous structure of the water-conducting layer 44, and the capillary effect almost fails. Therefore, there is no need to worry about the water-conducting layer 44 causing water sample leakage.

[0079] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A portable multi-parameter water quality analyzer, comprising a main unit (1) and a reagent kit (2), characterized in that, The main body (1) is provided with a water pump (3), and a micro water pump (4) is provided inside the main body (1). The inlet of the micro water pump (4) is connected to the water pump (3). The main body (1) is provided with a slot (5) that matches the reagent kit (2). The top of the slot (5) is provided with a water outlet pipe (6). The water outlet pipe (6) is connected to the outlet of the micro water pump (4). A pressure plate (7) is horizontally slidably installed on the upper side of the slot (5). A connector (8) is fixedly installed on the pressure plate (7). The insertion tube (8) passes through the pressure plate (7) and is slidably engaged in the water outlet pipe (6). A return spring (9) is provided inside the water outlet pipe (6). The return spring (9) is used to keep the insertion tube (8) pushed upward. The main body (1) is also provided with a starting groove (10) communicating with the slot (5). A starting rod (11) is horizontally installed inside the starting groove (10). The starting rod (11) is fixedly connected to the pressure plate (7). A start button (12) is provided at the bottom of the starting groove (10). Button (12) is electrically connected to micro water pump (4); the reagent kit (2) includes a box body (201), a top cover (202) and a back plate (203). The box body (201), the top cover (202) and the back plate (203) together form a sealed chamber. The sealed chamber is divided into a water inlet chamber (13) and multiple detection chambers (14). The detection chambers (14) are all located below the water inlet chamber (13). Each detection chamber (14) is connected to the water inlet chamber (13) by a port (15). The detection chamber (14) is used to store powdered test reagents. The top cover (202) is provided with a water injection tube (16) that matches the insertion tube (8). A hollow sealing tube (17) is slidably arranged inside the water injection tube (16). The top of the sealing tube (17) is open and the bottom is closed. A liquid outlet (18) that passes through the sealing tube (17) is horizontally opened on the lower side of the sealing tube (17). The water injection tube (16) is also provided with a sealing spring (19) for keeping the sealing tube (17) pushed upward.

2. The portable multi-parameter water quality analyzer according to claim 1, characterized in that, Each of the detection chambers (14) is divided into a water inlet (141) and a reaction chamber (142). The inlet (15) is connected to the top of the water inlet (141), and the lower side of the water inlet (141) is connected to the lower side of the reaction chamber (142). The reaction chamber (142) is provided with a partition platform (20). The partition platform (20) is provided with a reaction port (21) for liquid flow. The partition platform (20) is provided with an elastic plastic baffle (22). One end of the plastic baffle (22) is fixedly installed on one side of the reaction port (21), and the other end is a free end that is tilted upward and overlaps the other side of the reaction port (21). The plastic baffle (22) is used to separate the reaction chamber (142) and the water inlet (141). Powdered detection reagents are stored in the reaction chamber (142).

3. The portable multi-parameter water quality analyzer according to claim 2, characterized in that, The water inlet chamber (13) is equipped with a partition (23) that slides up and down inside. The partition (23) is inverted "n" shape. The partition (23) divides the water inlet chamber (13) into a liquid chamber (131) and a gas chamber (132). The liquid chamber (131) is located on the lower side. The lower end of the water injection pipe (16) is located in the liquid chamber (131). The liquid chamber (131) and the gas chamber (132) are sealed and isolated by the partition (23). The gas chamber (132) is provided with a top spring (24) for pushing the partition (23) downward. The top cover (202) is provided with an exhaust hole (25) that passes through the top cover (202). A sealing block (41) is fixedly installed on the partition (23). When the partition (23) moves upward to the limit position, the sealing block (41) is inserted into the exhaust hole (25) and seals the exhaust hole (25).

4. A portable multi-parameter water quality analyzer according to claim 3, characterized in that, Each of the reaction sections (142) is provided with a connecting pipe (26) at the top. The connecting pipe (26) is used to connect the reaction section (142) and the gas chamber (132). A float plate (27) is slidably installed inside the reaction section (142). The float plate (27) is located on the upper side of the plastic baffle (22). The powdered test reagent is stored between the plastic baffle (22) and the float plate (27).

5. A portable multi-parameter water quality analyzer according to claim 3, characterized in that, The partition (23) has a side plate (28) on the side away from the water injection pipe (16). The side plate (28) is located in the liquid chamber (131). A push plate (29) is horizontally slidably installed in the liquid chamber (131). The bottom of the push plate (29) is in contact with the bottom of the water inlet chamber (13). The top and left and right sides of the push plate (29) are in contact with the bottom and left and right sides of the "n"-shaped partition (23), respectively. A horizontal spring (30) is horizontally installed on the side plate (28). The horizontal spring (30) is used to keep pushing the side plate (28) toward the water injection pipe (16).

6. A portable multi-parameter water quality analyzer according to claim 4, characterized in that, A groove (31) is provided between the top of the reaction section (142) and the top of the water inlet section (141). An elastic sealing sheet (32) made of plastic sheet is slidably installed inside the groove (31). The elastic sealing sheet (32) includes a raised part (321) and a horizontal part (322). The horizontal part (322) is horizontally slidably inserted into the groove (31). The raised part (321) is located inside the reaction section (142) and bends downward. The end of the raised part (321) away from the horizontal part (322) abuts against the side wall of the reaction section (142) away from the water inlet section (141).

7. A portable multi-parameter water quality analyzer according to claim 6, characterized in that, The top of the partition (23) is provided with multiple storage slots (33) corresponding to multiple reaction sections (142). The top of each storage slot (33) and the side facing the back plate (203) are provided with openings. The top cover (202) is provided with multiple push rods (34) corresponding to multiple storage slots (33). Each push rod (34) is provided with a sealing plate (35) at its bottom. The sealing plate (35) is used to insert into the storage slot (33) and close the top of the storage slot (33). Each sealing plate (35) is provided with a needle (36) at its bottom. An airbag (37) is provided inside the tank (33). The airbag (37) is used to seal and store liquid test reagents. The storage tank (33) forms a sealed chamber with the back plate (203) and the sealing plate (35). The bottom of the partition plate (23) is provided with multiple injection tubes (38) corresponding to multiple reaction parts (142). Each injection tube (38) penetrates the top of the corresponding reaction part (142) and penetrates the float plate (27) inside the reaction part (142). The injection tube (38) is used to connect the storage tank (33) with the corresponding reaction part (142).

8. A portable multi-parameter water quality analyzer according to claim 2, characterized in that, Each of the plastic baffles (22) has a plurality of protrusions (39) on its free end, and the plurality of protrusions (39) are evenly spaced along the length of the plastic baffle (22).

9. A portable multi-parameter water quality analyzer according to claim 3, characterized in that, A humidity sensor (42) is provided on the lower side of the pressure plate (7) corresponding to the exhaust hole (25). A connecting spring (43) is provided between the humidity sensor (42) and the bottom of the pressure plate (7). The top end of the connecting spring (43) is fixedly installed on the bottom of the pressure plate (7), and the bottom end of the connecting spring (43) is fixedly connected to the humidity sensor (42). The sealing block (41) is wrapped with a water-absorbing layer (44). The water-absorbing layer (44) is made of a porous material with a hydrophilic surface. The bottom of the water-absorbing layer (44) is fixedly connected to the top surface of the partition (23). A buzzer (45) is provided on the main body. The humidity sensor (42) is electrically connected to the buzzer (45), and the humidity sensor (42) is electrically connected to the start button (12).

10. A portable multi-parameter water quality analyzer according to claim 1, characterized in that, The end of the pressure plate (7) away from the insertion tube (8) is provided with a downwardly inclined extrusion plate (40), which is used to horizontally extrude the reagent kit (2) into the slot (5) when the pressure plate (7) moves downward.

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