A water quality detection colorimetric device provided with an anti-interference pretreatment structure

Abstract

The utility model is used for water quality detection technical field discloses a water quality detection colorimetric device with anti -interference pretreatment structure, including mounting seat, the lower end inside fixed mounting of mounting seat has first switching motor, and first switching motor's output shaft upper end penetrates the upper surface of mounting seat. This water quality detection colorimetric device with anti -interference pretreatment structure, through first switching motor drive pretreatment disc rotation, cooperate and place the filter screen on pretreatment disc, can carry out sufficient filtration to water quality sample, intercept suspended particle, colloidal impurity etc. Solid state interference, simultaneously, when the process of pretreatment disc rotation can be placed after the sample of filtration, promote the small particle that is not intercepted to settle down, further improve sample purity, effectively avoid the reflection, scattering of light of impurity in colorimetric detection stage, reduce the deviation of micro -size silicon photoelectric detector receiving light signal, improve the accuracy of pollutant concentration calculation.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing technology, specifically a water quality testing colorimetric device with an anti-interference pretreatment structure. Background Technology

[0002] In fields such as environmental monitoring, drinking water safety assessment, and industrial wastewater discharge control, accurate detection of water pollutant concentrations is a core link in ensuring ecological security and human health. Colorimetry, as a convenient and efficient water quality detection technology, can quickly calculate the content of pollutants in water by comparing the light absorption characteristics of samples and standard samples. Its core relies on the signal accuracy of optical components such as miniature silicon photodetectors. The purity of the test sample directly determines the authenticity of the optical signal. Therefore, the sample pretreatment process becomes a key factor affecting the test results. Currently, most mainstream water quality testing colorimetric devices suffer from a design flaw of "emphasizing detection but neglecting pretreatment," making it difficult to effectively remove interfering terms from samples and thus limiting detection accuracy. Specific problems manifest in the following two aspects: Firstly, incomplete sample pretreatment leaves solid interference residues that affect optical detection. Water samples often contain suspended particles, colloidal impurities, microbial aggregates, and other solid substances. Existing devices, if they do not have a targeted pretreatment structure or only use a single-layer simple filter, cannot completely remove fine impurities. Even if some devices are equipped with filter components, they lack a post-filter settling buffer mechanism, and the unremoved tiny particles remain suspended in the sample. During the colorimetric detection stage, these suspended impurities will reflect and scatter the detection light, causing deviations in the light signal received by the miniature silicon photodetector, which in turn leads to inaccurate pollutant concentration calculation results. Secondly, the liquid collection process is prone to disturbing the sediment and destroying the sample settling effect. Although some devices recognize the importance of settling for impurity sedimentation, when transferring the settled sample to the testing station, the traditional liquid collection methods such as open pouring and pipette aspiration are easily caused by operational disturbances, which cause the impurities that have settled in the lower layer to float back up and mix into the clear liquid in the upper layer. Utility Model Content

[0003] The purpose of this invention is to provide a water quality detection colorimetric device with an anti-interference pretreatment structure to solve the problems mentioned in the background art, such as incomplete sample pretreatment, residual solid interference affecting optical detection, and easy disturbance of sedimentation during liquid collection, which damages the sample settling effect and leads to limited detection accuracy.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a water quality detection colorimetric device with an anti-interference pretreatment structure, comprising a mounting base, a first switching motor fixedly mounted inside the lower end of the mounting base, the upper end of the output shaft of the first switching motor penetrating the upper surface of the mounting base, and a pretreatment disk fixedly connected to the upper end of the output shaft of the first switching motor, a filter screen placed on the upper end of the pretreatment disk, a functional seat provided on one side of the mounting base, a second switching motor fixedly mounted inside the lower end of the functional seat, the upper end of the output shaft of the second switching motor penetrating the upper surface of the functional seat, a placement disk fixedly connected to the upper end of the output shaft of the second switching motor, a sample receiving disk placed on the upper surface of the placement disk, a standard sample receiving disk placed on the upper end of the functional seat on one side of the placement disk, and a first electric push rod fixedly mounted on the upper end of the functional seat on one side of the standard sample receiving disk, a sliding plate fixedly connected to one end of the first electric push rod, the sliding plate being slidably connected to the functional seat, and a miniature silicon photodetector fixedly mounted on the lower surface of the sliding plate; An extrusion seat is fixedly installed inside the upper end of the mounting base. A functional cavity is opened inside the upper end of the pretreatment plate, and a sliding lifting ring is installed inside the pretreatment plate. A rotating contact wheel is installed at the lower end of the lifting ring. A sliding piston plate and piston block are installed on the inner surface of the upper end of the pretreatment plate, and a connecting groove is opened inside the piston block. A pressure relief groove is opened inside the inner surface of the upper end of the pretreatment plate, and a one-way valve is fixedly installed on the outer surface of the upper end of the pretreatment plate. A liquid outlet groove is opened inside the inner surface of the lower end of the pretreatment plate, and a guide groove and a second electric push rod are fixedly installed on the outer surface of the pretreatment plate.

[0005] Preferably, the extrusion seat is an isosceles trapezoid with both ends angled downwards, and the plane at the upper end of the extrusion seat is in contact with the contact wheel.

[0006] By adopting the above technical solution, the contact wheel can roll along the inclined surface of the extrusion seat during the rotation of the pretreatment disc, driving the lifting ring to slide upward in the pretreatment disc, so that the upper inclined surface of the lifting ring fits against the lower inner surface of the functional cavity, thereby sealing the functional cavity and ensuring that the functional cavity remains closed during the sampling stage.

[0007] Preferably, the upper end of the lifting ring is inclined, and the inclined surface of the upper end of the lifting ring faces downward toward the outside of the pretreatment plate. The lifting ring and the pretreatment plate are connected by sliding friction, and a spring is connected between the lifting ring and the pretreatment plate. The outer surface of the upper end of the lifting ring is in contact with the inner surface of the lower end of the functional cavity.

[0008] By adopting the above technical solution, the inclined surface design of the upper end of the lifting ring facilitates its contact with the inner surface of the lower end of the functional cavity, thereby sealing the functional cavity. The sliding friction connection and the setting of the spring allow the lifting ring to slide along the pretreatment disc under the drive of the contact wheel, and to reset under the action of the spring after the contact wheel leaves the extrusion seat, while ensuring the contact effect between the outer surface of the upper end of the lifting ring and the inner surface of the lower end of the functional cavity.

[0009] Preferably, the piston plate and the pretreatment disk are connected by sliding friction, and a spring is connected between the piston plate and the pretreatment disk, and one end of the internal cavity of the pretreatment disk in which the piston plate is located penetrates the outer surface of the pretreatment disk.

[0010] By adopting the above technical solution, the piston plate can slide inside the pretreatment disk and, under the action of the spring, keep one end of the cavity inside the pretreatment disk sealed, preventing the sample from leaking out from that end and ensuring the stability of the sample during the pretreatment process.

[0011] Preferably, the piston block and the pretreatment disk are connected by sliding friction, and a spring is connected between the piston block and the pretreatment disk. One end of the internal cavity of the pretreatment disk in which the piston block is located penetrates the outer surface of the pretreatment disk, and the two ends of the connecting groove penetrate the end of the piston block facing the inside of the pretreatment disk and the lower surface of the piston block, respectively.

[0012] Using the above technical solution, the piston block can slide inside the pretreatment disk. Initially, it blocks the outer surface of the pretreatment disk under the action of the spring. When the second electric push rod pushes the piston block to move into the pretreatment disk, the two ends of the connecting groove pass through the end of the piston block facing the inside of the pretreatment disk and the lower surface, respectively, allowing the upper layer of clear liquid of the sample to flow out through the liquid outlet groove, realizing the directional delivery of clear liquid. At the same time, the spring ensures the blocking state of the piston block when it is not pushed.

[0013] Preferably, one end of the pressure relief groove penetrates the upper surface of the functional cavity, and the other end of the pressure relief groove is connected to the one-way valve. The upper end of the liquid outlet groove penetrates the inner surface of the cavity inside the pretreatment plate where the piston block is located, and the lower end of the liquid outlet groove penetrates the outer surface of the pretreatment plate. The lower end of the liquid outlet groove is directly opposite the guide groove. The inner bottom surface of the guide groove is designed with a slope, and one end of the guide groove is directly opposite the sample receiving plate. One end of the second electric push rod is directly opposite the cavity inside the pretreatment plate where the piston block is located.

[0014] Using the above technical solution, the pressure relief tank is connected to the one-way valve to balance the pressure in the pretreatment tray. The upper end of the liquid outlet tank penetrates the inner surface of the cavity where the piston block is located, and the lower end is directly opposite the guide tank, which facilitates the outflow of clear liquid. The inclined design of the bottom surface inside the guide tank can directionally transport the clear liquid to the sample receiving tray. The second electric push rod pushes the piston block to move so that the connecting tank and the liquid outlet tank are aligned, realizing the outflow of clear liquid. The entire structure works together to avoid disturbing the sediment during liquid collection, ensuring the stability of the liquid collection process and ensuring that the clear liquid is accurately delivered to the sample receiving tray.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the water quality detection colorimetric device equipped with an anti-interference pretreatment structure: 1. The pretreatment disk is driven to rotate by the first switching motor. In conjunction with the filter screen placed on the pretreatment disk, the water sample can be fully filtered to intercept solid interferences such as suspended particles and colloidal impurities. At the same time, the filtered sample can be allowed to stand and buffer during the rotation of the pretreatment disk, which promotes the sedimentation of the small particles that have not been intercepted, further improving the purity of the sample. This effectively avoids the reflection and scattering of light by impurities during the colorimetric detection stage, reduces the deviation of the light signal received by the micro silicon photodetector, and improves the accuracy of pollutant concentration calculation. 2. During liquid collection, the contact wheel is pressurized, causing the lifting ring to move upward and seal the functional chamber. The upper clear liquid is then directionally transported to the sample receiving tray through the liquid outlet and guide channel. This avoids disturbance to the sedimentation caused by traditional open-top pouring and pipette suction methods, and prevents the lower sedimented impurities from mixing into the upper clear liquid. At the same time, the pressure relief tank and one-way valve can balance the pressure in the pretreatment tray, ensuring a stable liquid collection process and further guaranteeing the reliability of the test results.

[0016] 3. The second switching motor drives the placement tray to rotate, enabling rapid switching between the sample receiving tray and the standard sample receiving tray. Combined with the first electric push rod driving the sliding plate and the miniature silicon photodetector to slide and detect, the entire detection process is highly automated, reducing manual intervention. This not only improves detection efficiency but also reduces the risk of human error, making it suitable for the rapid detection needs of batch samples and meeting the requirements of continuously upgrading water quality testing standards. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram showing the connection between the mounting base, pretreatment tray, and filter screen of this utility model; Figure 3 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model; Figure 4 This is a three-dimensional structural diagram of the connection between the mounting base, pretreatment disc, and filter screen of this utility model; Figure 5 This is a three-dimensional structural diagram of the connection between the mounting base and the extrusion base of this utility model; Figure 6 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Mounting base; 2. First switching motor; 3. Pretreatment tray; 4. Filter screen; 5. Functional seat; 6. Second switching motor; 7. Placement tray; 8. Sample receiving tray; 9. Standard sample receiving tray; 10. First electric push rod; 11. Sliding plate; 12. Miniature silicon photodetector; 13. Squeezing seat; 14. Functional cavity; 15. Lifting ring; 16. Contact wheel; 17. Piston plate; 18. Piston block; 19. Connecting groove; 20. Pressure relief groove; 21. One-way valve; 22. Liquid outlet groove; 23. Flow guide groove; 24. Second electric push rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-6 This utility model provides a technical solution: a water quality detection colorimetric device with an anti-interference pretreatment structure.

[0021] Example 1: This example discloses: a mounting base 1, a first switching motor 2 is fixedly installed inside the lower end of the mounting base 1, and the upper end of the output shaft of the first switching motor 2 passes through the upper surface of the mounting base 1, and a pretreatment disk 3 is fixedly connected to the upper end of the output shaft of the first switching motor 2. A filter screen 4 is placed on the upper end of the pretreatment disk 3. A functional seat 5 is provided on one side of the mounting base 1, and a second switching motor 6 is fixedly installed inside the lower end of the functional seat 5. The upper end of the output shaft of the second switching motor 6 passes through the upper surface of the functional seat 5, and a placement disk 7 is fixedly connected to the upper end of the output shaft of the second switching motor 6. A sample receiving disk 8 is placed on the upper surface of the placement disk 7. A standard sample receiving disk 9 is placed on the upper end of the functional seat 5 on one side of the placement disk 7, and a first electric push rod 10 is fixedly installed on the upper end of the functional seat 5 on one side of the standard sample receiving disk 9. A sliding plate 11 is fixedly connected to one end of the first electric push rod 10, and the sliding plate 11 is slidably connected to the functional seat 5. A miniature silicon photodetector 12 is fixedly installed on the lower surface of the sliding plate 11. When the water sample is poured into the pretreatment tray 3, the first switching motor 2 starts, and its output shaft drives the pretreatment tray 3 to rotate around the axis of the mounting base 1. The filter screen 4 at the top of the pretreatment tray 3 rotates with the tray to perform preliminary filtration of the sample and intercept solid interferences such as suspended particles and colloidal impurities. During the rotation of the pretreatment disk 3, the lifting ring 15 is connected to the pretreatment disk 3 through a spring. When the contact wheel 16 at its lower end rolls along the inclined surface of the extrusion seat 13, the lifting ring 15 can slide upward in the pretreatment disk 3. Its upper inclined surface is in contact with the inner surface of the lower end of the functional cavity 14, ensuring that the functional cavity 14 remains closed during the sampling stage. The piston plate 17 and the piston block 18 are connected to the pretreatment disk 3 through a spring. In the initial state, they seal the side cavity of the pretreatment disk 3 to prevent sample leakage.

[0022] Example 2: This example is based on Example 1: A squeezing seat 13 is fixedly installed inside the upper end of the mounting base 1; a functional cavity 14 is opened inside the upper end of the pretreatment plate 3; a sliding lifting ring 15 is installed inside the pretreatment plate 3; a rotating contact wheel 16 is installed at the lower end of the lifting ring 15; a sliding piston plate 17 and a piston block 18 are installed on the inner surface of the upper end of the pretreatment plate 3; a connecting groove 19 is opened inside the piston block 18; a pressure relief groove 20 is opened inside the inner surface of the upper end of the pretreatment plate 3; a one-way valve 21 is fixedly installed on the outer surface of the upper end of the pretreatment plate 3; a liquid outlet groove 22 is opened inside the inner surface of the lower end of the pretreatment plate 3; and a guide groove 23 and a second electric push rod 24 are fixedly installed on the outer surface of the pretreatment plate 3. The extrusion seat 13 is an isosceles trapezoid with both ends angled downwards, and the plane at the upper end of the extrusion seat 13 is in contact with the contact wheel 16; The upper end of the lifting ring 15 is set with an inclined surface, and the inclined surface of the upper end of the lifting ring 15 is set downward and facing the outside of the pretreatment plate 3. The lifting ring 15 and the pretreatment plate 3 are connected by sliding friction, and a spring is connected between the lifting ring 15 and the pretreatment plate 3. The outer surface of the upper end of the lifting ring 15 is in contact with the inner surface of the lower end of the functional cavity 14. The piston plate 17 and the pretreatment disk 3 are connected by sliding friction, and a spring is connected between the piston plate 17 and the pretreatment disk 3. One end of the internal cavity of the pretreatment disk 3 where the piston plate 17 is located penetrates the outer surface of the pretreatment disk 3. The piston block 18 is connected to the pretreatment disk 3 by sliding friction, and a spring is connected between the piston block 18 and the pretreatment disk 3. One end of the internal cavity of the pretreatment disk 3 where the piston block 18 is located penetrates the outer surface of the pretreatment disk 3, and the two ends of the connecting groove 19 penetrate the end of the piston block 18 facing the inside of the pretreatment disk 3 and the lower surface of the piston block 18, respectively. One end of the pressure relief groove 20 penetrates the upper surface of the functional cavity 14, and the other end of the pressure relief groove 20 is connected to the one-way valve 21. The upper end of the liquid outlet groove 22 penetrates the inner surface of the cavity inside the pretreatment plate 3 where the piston block 18 is located, and the lower end of the liquid outlet groove 22 penetrates the outer surface of the pretreatment plate 3. The lower end of the liquid outlet groove 22 is set directly opposite the guide groove 23. The inner bottom surface of the guide groove 23 is designed with a slope, and one end of the guide groove 23 is set directly opposite the sample receiving plate 8. One end of the second electric push rod 24 is set directly opposite the cavity inside the pretreatment plate 3 where the piston block 18 is located. After the sample has settled, the second electric push rod 24 extends and pushes the piston block 18 into the pretreatment tray 3 until the lower end of the connecting groove 19 in the piston block 18 is directly opposite the upper opening of the liquid outlet 22. The clear liquid on the upper layer of the sample flows into the guide groove 23 through the liquid outlet 22. The bottom surface of the guide groove 23 is designed with a slope to directionally transport the clear liquid to the sample receiving tray 8. The contact wheel 16 drives the lifting ring 15 to seal the lower end of the functional chamber 14 to prevent internal pressure fluctuations during liquid collection. The pressure relief tank 20 is connected to the outside through the one-way valve 21 to balance the air pressure in the pretreatment tray 3 and ensure stable outflow of the clear liquid. The piston plate 17 is kept in a blocked state under the action of the spring to prevent the sample from overflowing from other channels, thus achieving the technical effect of "liquid collection without disturbing the sedimentation". At the same time, the piston plate 17 is closed in the functional chamber 14 to balance the internal pressure of the functional chamber 14 and prevent the lifting ring 15 from being unable to slide upward. After the sample receiving tray 8 receives liquid, the second switching motor 6 drives the placement tray 7 to rotate, rotating the sample receiving tray 8 sequentially to below the miniature silicon photodetector 12. The first electric push rod 10 drives the sliding plate 11 to slide along the functional seat 5, causing the miniature silicon photodetector 12 to move down to the detection position. The light absorption characteristics of the samples and standard samples in the sample receiving tray 8 and the standard sample receiving tray 9 are detected respectively. Through automated switching and detection processes, human intervention errors are reduced, adapting to the needs of batch sample detection.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water quality testing colorimetric device with an anti-interference pretreatment structure, comprising a mounting base (1), wherein a first switching motor (2) is fixedly mounted inside the lower end of the mounting base (1), and the upper end of the output shaft of the first switching motor (2) penetrates the upper surface of the mounting base (1), and a pretreatment disc (3) is fixedly connected to the upper end of the output shaft of the first switching motor (2), characterized in that: A filter screen (4) is placed on the upper end of the pretreatment tray (3). A functional seat (5) is provided on one side of the mounting base (1). A second switching motor (6) is fixedly installed inside the lower end of the functional seat (5). The upper end of the output shaft of the second switching motor (6) passes through the upper surface of the functional seat (5). A placement tray (7) is fixedly connected to the upper end of the output shaft of the second switching motor (6). A sample receiving tray (8) is placed on the upper surface of the placement tray (7). A standard sample receiving tray (9) is placed on the upper end of the functional seat (5) on one side of the placement tray (7). A first electric push rod (10) is fixedly installed on the upper end of the functional seat (5) on one side of the standard sample receiving tray (9). A sliding plate (11) is fixedly connected to one end of the first electric push rod (10). The sliding plate (11) is slidably connected to the functional seat (5). A miniature silicon photodetector (12) is fixedly installed on the lower surface of the sliding plate (11).

2. The water quality detection colorimetric device with anti-interference pre-processing structure according to claim 1, characterized in that: The upper end of the mounting base (1) is fixedly provided with a squeezing seat (13), the upper end of the pretreatment plate (3) is provided with a functional cavity (14), and the interior of the pretreatment plate (3) is provided with a sliding lifting ring (15), and the lower end of the lifting ring (15) is provided with a rotating contact wheel (16). The upper inner surface of the pretreatment plate (3) is provided with a sliding piston plate (17) and a piston block (18), and the interior of the piston block (18) is provided with a connecting groove (19). The upper side surface of the pretreatment plate (3) is provided with a pressure relief groove (20), and the upper outer surface of the pretreatment plate (3) is fixedly provided with a one-way valve (21). The lower side surface of the pretreatment plate (3) is provided with a liquid outlet groove (22), and the outer surface of the pretreatment plate (3) is fixedly provided with a guide groove (23) and a second electric push rod (24).

3. A water quality detection colorimetric device with anti-interference pre-processing structure according to claim 2, characterized in that: The extrusion seat (13) is an isosceles trapezoid with both ends angled downwards, and the plane at the upper end of the extrusion seat (13) is in contact with the contact wheel (16).

4. The water quality testing colorimetric device with anti-interference pre-processing structure according to claim 2, characterized in that: The upper end of the lifting ring (15) is set with an inclined surface, and the inclined surface of the upper end of the lifting ring (15) is set downward towards the outside of the pretreatment plate (3). The lifting ring (15) and the pretreatment plate (3) are connected by sliding friction, and a spring is connected between the lifting ring (15) and the pretreatment plate (3). The outer surface of the upper end of the lifting ring (15) is in contact with the inner surface of the lower end of the functional cavity (14).

5. The water quality testing colorimetric device with anti-interference pre-processing structure according to claim 2, characterized in that: The piston plate (17) and the pretreatment disk (3) are connected by sliding friction, and a spring is connected between the piston plate (17) and the pretreatment disk (3). One end of the internal cavity of the pretreatment disk (3) where the piston plate (17) is located penetrates the outer surface of the pretreatment disk (3).

6. The water quality testing colorimetric device with anti-interference pre-processing structure according to claim 2, characterized in that: The piston block (18) and the pretreatment disk (3) are connected by sliding friction, and a spring is connected between the piston block (18) and the pretreatment disk (3). One end of the internal cavity of the pretreatment disk (3) where the piston block (18) is located penetrates the outer surface of the pretreatment disk (3). The two ends of the connecting groove (19) penetrate the end of the piston block (18) facing the inside of the pretreatment disk (3) and the lower surface of the piston block (18), respectively.

7. A water quality detection colorimetric device with an anti-interference pretreatment structure according to claim 2, characterized in that: One end of the pressure relief groove (20) penetrates the upper surface of the functional cavity (14), and the other end of the pressure relief groove (20) is connected to the one-way valve (21). The upper end of the liquid outlet groove (22) penetrates the inner surface of the cavity inside the pretreatment plate (3) where the piston block (18) is located, and the lower end of the liquid outlet groove (22) penetrates the outer surface of the pretreatment plate (3). The lower end of the liquid outlet groove (22) is set directly opposite the guide groove (23). The inner bottom surface of the guide groove (23) is designed with a slope, and one end of the guide groove (23) is set directly opposite the sample receiving plate (8). One end of the second electric push rod (24) is set directly opposite the cavity inside the pretreatment plate (3) where the piston block (18) is located.

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